Do a better job of 942a35f517

Commit 3e659bd4ec removed the concept of
an usptream DNS server which is capable of DNSSEC: they are all
(at least in theory) now usable. As a very unfortunate side-effect,
this removed the filter that ensured that dnssec_server() ONLY
returns servers, and not domains with literal addresses.

If we try and do DNSSEC queries for a domain, and there's
a --address line which matches the domain, then dnssec_server()
will return that. This would break DNSSEC validation, but that's
turns out not to matter, because under these circumstances
dnssec_server() will probably return an out-of-bounds index into
the servers[] array, and the process dies with SIGSEGV.

Many thanks to the hard workers at the Tomato project who
found this bug and provided enough information to diagnose it.

.gitignore

@@ -7,15 +7,4 @@ src/.copts_*
 contrib/lease-tools/dhcp_lease_time
 contrib/lease-tools/dhcp_release
 contrib/lease-tools/dhcp_release6
-debian/.debhelper
-debian/auto-build
-debian/debhelper-build-stamp
-debian/files
-debian/*.substvars
-debian/*.debhelper
-debian/*.log
-debian/dnsmasq-base-lua/
-debian/dnsmasq-base/
-debian/dnsmasq-utils/
-debian/dnsmasq/
-debian/tmp
+

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "debian"]
+	path = debian
+	url = git://thekelleys.org.uk/dnsmasq-debian.git
+[submodule "submodules/dnsmasq-debian"]
+	path = submodules/dnsmasq-debian
+	url = https://thekelleys.org.uk/git/dnsmasq-debian

CHANGELOG

@@ -1,3 +1,154 @@
+version 2.92
+        Redesign the interaction between DNSSEC validation and per-domain
+	servers, specified as --server=/<domain>/<ip-address>. This should
+	just work in all cases now. If the normal chain-of-trust exists into
+	the delegated domain then whether the domain is signed or not, DNSSEC
+	validation will function normally. In the case the delegated domain
+	is an "overlay" on top of the global DNS and no NS and/or DS records
+	exist connecting it to the global dns, then if the domain is
+	unsigned the situation will be handled by synthesising a
+	proof-of-non-existence-of-DS for the domain and queries will be
+	answered unvalidated; this action will be logged. A signed domain
+	without chain-of-trust can be validated if a suitable trust-anchor
+	is provided using --trust-anchor. This change should be backwards
+	compatible for all existing working configurations; it extends the
+	space of possible configurations which are functional.
+
+	Fix a couple of problems with DNSSEC validation and DNAME. One
+	could cause validation failure on correct domains, and the other
+	would fail to spot an invalid domain. Thanks to Graham Clinch
+	for spotting the problem.
+
+	
+version 2.91
+	Fix spurious "resource limit exceeded messages". Thanks to 
+	Dominik Derigs for the bug report.
+
+	Fix out-of-bounds heap read in order_qsort().
+	We only need to order two server records on the ->serial field.
+	Literal address records are smaller and don't have
+	this field and don't need to be ordered on it.
+	To actually provoke this bug seems to need the same server-literal
+	to be repeated twice, e.g., --address=/a/1.1.1.1 --address-/a/1.1.1.1
+	which is clearly rare in the wild, but if it did exist it could
+	provoke a SIGSEGV. Thanks to Daniel Rhea for fuzzing this one.
+
+	Fix buffer overflow when configured lease-change script name
+	is too long.
+	Thanks to Daniel Rhea for finding this one.
+
+	Improve behaviour in the face of non-responsive upstream TCP DNS
+	servers. Without shorter timeouts, clients are blocked for too long
+	and fail with their own timeouts.
+
+	Set --fast-dns-retries by default when doing DNSSEC. A single
+	downstream query can trigger many upstream queries. On an
+	unreliable network, there may not be enough downstream retries
+	to ensure that all these queries complete.
+
+	Improve behaviour in the face of truncated answers to queries
+	for DNSSEC records. Getting these answers by TCP doesn't now
+	involve a faked truncated answer to the downstream client to
+	force it to move to TCP. This improves performance and robustness
+	in the face of broken clients which can't fall back to TCP.
+
+	No longer remove data from truncated upstream answers. If an
+	upstream replies with a truncated answer, but the answer has some
+	RRs included, return those RRs, rather than returning and
+	empty answer.
+
+	Fix handling of EDNS0 UDP packet sizes.
+	When talking upstream we always add a pseudo header, and set the
+        UDP packet size to --edns-packet-max. Answering queries from
+	downstream, we get the answer (either from upstream or local
+	data) If local data won't fit the advertised size (or 512 if
+	there's not an EDNS0 header) return truncated. If upstream
+        returns truncated, do likewise. If upstream is OK, but the
+	answer is too big for downstream, truncate the answer.
+
+	Modify the behaviour of --synth-domain for IPv6.
+	When deriving a domain name from an IPv6 address, an address
+	such as 1234:: would become 1234--.example.com, which is
+	not legal in IDNA2008. Stop using the :: compression method,
+	so 1234:: becomes
+	1234-0000-0000-0000-0000-0000-0000-0000.example.com
+
+	Fix broken dhcp-relay on *BSD. Thanks to Harold for finding
+	this problem.
+
+	Add --dhcp-option-pxe config. This acts almost exactly like
+	--dhcp-option except that the defined option is only sent when
+	replying to PXE clients. More importantly, these options are sent
+	in reply PXE clients when dnsmasq in acting in PXE proxy mode. In
+	PXE proxy mode, the set of options sent is defined by the PXE standard
+	and the normal set of options is not sent. This config allows arbitrary
+	options in PXE-proxy replies. A typical use-case is to send option
+	175 to iPXE. Thanks to Jason Berry for finding the requirement for
+	this.
+
+	Support PXE proxy-DHCP and DHCP-relay at the same time.
+        When using PXE proxy-DHCP, dnsmasq supplies PXE information to
+        the client, which also talks to another "normal" DHCP server
+        for address allocation and similar. The normal DHCP server may
+        be on the local network, but it may also be remote, and accessed via
+        a DHCP relay. This change allows dnsmasq to act as both a
+        PXE proxy-DHCP server AND a DHCP relay for the same network.
+
+	Fix erroneous "DNSSEC validated" state with non-DNSSEC
+	upstream servers.  Thanks to Dominik Derigs for the bug report.
+
+	Handle queries with EDNS client subnet fields better. If dnsmasq
+	is configured to add an EDNS client subnet to a query, it is careful
+	to suppress use of the cache, since a cached answer may not be valid
+	for a query with a different client subnet. Extend this behaviour
+	to queries which arrive a dnsmasq already carrying an EDNS client
+	subnet.
+
+	Handle DS queries to auth zones. When dnsmasq is configured to
+	act as an authoritative server and has an authoritative zone
+	configured, and receives a query for that zone _as_forwarder_
+	it answers the query directly rather than forwarding it. This
+	doesn't affect the answer, but it saves dnsmasq forwarding the
+	query to the recursor upstream, which then bounces it back to dnsmasq
+	in auth mode. The exception should be when the query is for the root
+	of zone, for a DS RR. The answer to that has to come from the parent,
+	via the recursor, and will typically be a proof-of-non-existence
+	since dnsmasq doesn't support signed zones. This patch suppresses
+	local answers and forces forwarding to the upstream recursor for such
+	queries. It stops breakage when a DNSSEC validating client makes
+	queries to dnsmasq acting as forwarder for a zone for which it is
+	authoritative.
+
+	Implement "DNS-0x20 encoding", for extra protection against
+	reply-spoof attacks. Since DNS queries are case-insensitive,
+	it's possible to randomly flip the case of letters in a query
+	and still get the correct answer back.
+	This adds an extra dimension for a cache-poisoning attacker
+	to guess when sending replies in-the-blind since it's expected
+	that the legitimate answer will have the same  pattern of upper
+	and lower case as the query, so any replies which don't can be
+	ignored as malicious. The amount of extra entropy clearly depends
+	on the number of a-z and A-Z characters in the query, and this
+	implementation puts a hard limit of 32 bits to make resource
+	allocation easy. This about doubles entropy over the standard
+	random ID and random port combination. This technique can interact
+	badly with rare broken DNS servers which don't preserve the case
+	of the query in their reply. The first time a reply is returned
+	which matches the query in all respects except case, a warning
+	will be logged. In this release, 0x020-encoding is default-off
+	and must be explicitly enabled with --do-0x20-encoding. In future
+	releases it may default on. You can avoid a future release
+	changing the behaviour of an installation with --no-x20-encode.
+	
+	Fix a long-standing problem when two queries which are identical
+	in every respect _except_ case, get combined by dnsmasq. If
+	dnsmasq gets eg, two queries for example.com and Example.com
+	in quick succession it will get the answer for example.com from
+	upstream and send that answer to both requestors. This means that
+	the query for Example.com will get an answer for example.com, and
+	in the modern DNS, that answer may not be accepted.
+
+	
 version 2.90
 	Fix reversion in --rev-server introduced in 2.88 which
 	caused breakage if the prefix length is not exactly divisible
@@ -8,7 +159,7 @@ version 2.90
 	for a particular domain. Thanks to Daniel Danzberger for
 	spotting this bug.
 
-	Set the default maximum DNS UDP packet sice to 1232. This
+	Set the default maximum DNS UDP packet size to 1232. This
 	has been the recommended value since 2020 because it's the
 	largest value that avoid fragmentation, and fragmentation
 	is just not reliable on the modern internet, especially
@@ -16,16 +167,61 @@ version 2.90
 	--edns-packet-max for special circumstances.
 
 	Add --no-dhcpv4-interface and --no-dhcpv6-interface for
-	better control over which inetrfaces are providing DHCP service.
+	better control over which interfaces are providing DHCP service.
 
 	Fix issue with stale caching: After replying with stale data,
 	dnsmasq sends the query upstream to refresh the cache asynchronously
 	and sometimes sends the wrong packet: packet length can be wrong,
 	and if an EDE marking stale data is added to the answer that can
 	end up in the query also. This bug only seems to cause problems
-	when the usptream server is a DOH/DOT proxy. Thanks to Justin He
+	when the upstream server is a DOH/DOT proxy. Thanks to Justin He
 	for the bug report.
+
+	Add configurable caching for arbitrary RR-types.
+
+	Add --filter-rr option, to filter arbitrary RR-types.
+	--filter-rr=ANY has a special meaning: it filters the
+	answers to queries for the ANY RR-type.
 	
+	Add limits on the resources used to do DNSSEC validation.
+	DNSSEC introduces a potential CPU DoS, because a crafted domain
+	can force a validator to a large number of cryptographic
+	operations whilst attempting to do validation. When using TCP
+	transport a DNSKEY RRset contain thousands of members and any
+	RRset can have thousands of signatures. The potential number
+	of signature validations to follow the RFC for validation
+	for one RRset is the cross product of the keys and signatures,
+	so millions. In practice, the actual numbers are much lower,
+	so attacks can be mitigated by limiting the amount of
+	cryptographic "work" to a much lower amount. The actual
+	limits are number a signature validation fails per RRset(20),
+	number of signature validations and hash computations
+	per query(200), number of sub-queries  to fetch  DS and DNSKEY
+	RRsets per query(40), and the number of iterations in a
+	NSEC3 record(150). These values are sensible, but there is, as yet,
+	no standardisation on the values for a "conforming" domain, so a
+	new option --dnssec-limit is provided should they need to be altered.
+	The algorithm to validate DS records has also been altered to reduce
+	the maximum work from cross product of the number of DS records and
+	number of DNSKEYs to the cross product of the number of DS records
+	and supported DS digest types. As the number of DS digest types
+	is in single figures, this reduces the exposure.
+
+	Credit is due to Elias Heftrig, Haya Schulmann, Niklas Vogel,
+	and Michael Waidner from the German National Research Center for
+	Applied Cybersecurity ATHENE for finding this vulnerability.
+
+	CVE 2023-50387 and CVE 2023-50868 apply.
+	Note that this a security vulnerability only when DNSSEC validation
+	is enabled.
+	
+	Fix memory-leak when attempting to cache SRV records with zero TTL.
+	Thanks to Damian Sawicki for the bug report.
+
+	Add --max-tcp-connections option to make limit on TCP handling
+	processes configurable.  Also keep stats on how near the limit
+	we're getting, to help with tuning. Patch from Damian Sawicki.
+
 	
 version 2.89
         Fix bug introduced in 2.88 (commit fe91134b) which can result
@@ -102,7 +298,7 @@ version 2.88
 	upstream servers from /etc/resolv.conf or other sources that
 	can change dnsmasq tries to avoid memory fragmentation by re-using
 	existing records that are being re-read unchanged. This involves
-	seaching all the server records for each new one installed.
+	searching all the server records for each new one installed.
 	During startup this search is pointless, and can cause long
 	start times with thousands of --server options because the work
 	needed is O(n^2). Handle this case more intelligently.
@@ -165,7 +361,7 @@ version 2.87
 
 	Enhance --domain to accept, for instance,
 	--domain=net2.thekelleys.org.uk,eth2 so that hosts get a domain
-	which relects the interface they are attached to in a way which
+	which reflects the interface they are attached to in a way which
 	doesn't require hard-coding addresses. Thanks to Sten Spans for
 	the idea.
 
@@ -539,22 +735,22 @@ version 2.80
         but those which used the default of no checking will need to be
         altered to explicitly select no checking. The new default is
         because switching off checking for unsigned replies is
-	inherently dangerous. Not only does it open the possiblity of forged
+	inherently dangerous. Not only does it open the possibility of forged
         replies, but it allows everything to appear to be working even
         when the upstream namesevers do not support DNSSEC, and in this
-        case no DNSSEC validation at all is occuring.
+        case no DNSSEC validation at all is occurring.
 
         Fix DHCP broken-ness when --no-ping AND --dhcp-sequential-ip
 	are set. Thanks to Daniel Miess for help with this.
 
-	Add a facilty to store DNS packets sent/recieved in a
+	Add a facility to store DNS packets sent/received in a
 	pcap-format file for later debugging. The file location
 	is given by the --dumpfile option, and a bitmap controlling
 	which packets should be dumped is given by the --dumpmask
 	option.
 
 	Handle the case of both standard and constructed dhcp-ranges on the
-	same interface better. We don't now contruct a dhcp-range if there's
+	same interface better. We don't now construct a dhcp-range if there's
 	already one specified. This allows the specified interface to
 	have different parameters and avoids advertising the same
 	prefix twice. Thanks to Luis Marsano for spotting this case.
@@ -1024,7 +1220,7 @@ version 2.73
 
 	Use inotify for checking on updates to /etc/resolv.conf and
 	friends under Linux. This fixes race conditions when the files are 
-	updated rapidly and saves CPU by noy polling. To build
+	updated rapidly and saves CPU by not polling. To build
 	a binary that runs on old Linux kernels without inotify,
 	use make COPTS=-DNO_INOTIFY
 
@@ -1364,7 +1560,7 @@ version 2.68
 	are dynamic and works much better than the previous
 	work-around which exempted constructed DHCP ranges from the
 	IP address filtering. As a consequence, that work-around
-	is removed. Under certain circumstances, this change wil
+	is removed. Under certain circumstances, this change will
 	break existing configuration: if you're relying on the
 	constructed-range exception, you need to change --auth-zone
 	to specify the same interface as is used to construct your
@@ -1821,7 +2017,7 @@ version 2.61
 
 	Set the environment variable DNSMASQ_LOG_DHCP when running
 	the script id --log-dhcp is in effect, so that script can
-	taylor their logging verbosity. Suggestion from Malte
+	tailor their logging verbosity. Suggestion from Malte
 	Forkel.
 
 	Arrange that addresses specified with --listen-address

Makefile

@@ -1,4 +1,4 @@
-# dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+# dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -29,6 +29,7 @@ LDFLAGS       =
 COPTS         = 
 RPM_OPT_FLAGS = 
 LIBS          = 
+LUA           = lua
 
 #################################################################
 
@@ -60,22 +61,18 @@ idn2_cflags =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LIBIDN2 $(PKG_CONFI
 idn2_libs =     `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LIBIDN2 $(PKG_CONFIG) --libs libidn2`
 ct_cflags =     `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_CONNTRACK $(PKG_CONFIG) --cflags libnetfilter_conntrack`
 ct_libs =       `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_CONNTRACK $(PKG_CONFIG) --libs libnetfilter_conntrack`
-lua_cflags =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --cflags lua5.4` 
-lua_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --libs lua5.4` 
-nettle_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC     $(PKG_CONFIG) --cflags 'nettle hogweed' \
-                                                        HAVE_CRYPTOHASH $(PKG_CONFIG) --cflags nettle \
-                                                        HAVE_NETTLEHASH $(PKG_CONFIG) --cflags nettle`
-nettle_libs =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC     $(PKG_CONFIG) --libs 'nettle hogweed' \
-                                                        HAVE_CRYPTOHASH $(PKG_CONFIG) --libs nettle \
-                                                        HAVE_NETTLEHASH $(PKG_CONFIG) --libs nettle`
+lua_cflags =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --cflags $(LUA)` 
+lua_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LUASCRIPT $(PKG_CONFIG) --libs $(LUA)` 
+nettle_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC     $(PKG_CONFIG) --cflags 'nettle hogweed'`
+nettle_libs =   `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC     $(PKG_CONFIG) --libs 'nettle hogweed'`
 gmp_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DNSSEC NO_GMP --copy -lgmp`
 sunos_libs =    `if uname | grep SunOS >/dev/null 2>&1; then echo -lsocket -lnsl -lposix4; fi`
 nft_cflags =    `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_NFTSET $(PKG_CONFIG) --cflags libnftables` 
 nft_libs =      `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_NFTSET $(PKG_CONFIG) --libs libnftables`
 version =       -DVERSION='\"`$(top)/bld/get-version $(top)`\"'
 
-sum?=$(shell $(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' ')
-sum!=$(CC) -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' '
+sum?=$(shell echo $(CC) -DDNSMASQ_COMPILE_FLAGS="$(CFLAGS)" -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' ')
+sum!=echo $(CC) -DDNSMASQ_COMPILE_FLAGS="$(CFLAGS)" -DDNSMASQ_COMPILE_OPTS $(COPTS) -E $(top)/$(SRC)/dnsmasq.h | ( md5sum 2>/dev/null || md5 ) | cut -f 1 -d ' '
 copts_conf = .copts_$(sum)
 
 objs = cache.o rfc1035.o util.o option.o forward.o network.o \
@@ -84,7 +81,7 @@ objs = cache.o rfc1035.o util.o option.o forward.o network.o \
        dhcp-common.o outpacket.o radv.o slaac.o auth.o ipset.o pattern.o \
        domain.o dnssec.o blockdata.o tables.o loop.o inotify.o \
        poll.o rrfilter.o edns0.o arp.o crypto.o dump.o ubus.o \
-       metrics.o hash-questions.o domain-match.o nftset.o
+       metrics.o domain-match.o nftset.o
 
 hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
        dns-protocol.h radv-protocol.h ip6addr.h metrics.h
@@ -105,9 +102,7 @@ clean : mostly_clean
 	rm -f core */core
 	rm -f *~ contrib/*/*~ */*~
 
-install : all install-common
-
-install-common :
+install : all
 	$(INSTALL) -d $(DESTDIR)$(BINDIR)
 	$(INSTALL) -d $(DESTDIR)$(MANDIR)/man8
 	$(INSTALL) -m 644 $(MAN)/dnsmasq.8 $(DESTDIR)$(MANDIR)/man8 
@@ -124,7 +119,11 @@ all-i18n : $(BUILDDIR)
 		cd $(top) && cd $(BUILDDIR) && $(MAKE) top="$(top)" -f $(top)/Makefile $${f%.po}.mo; \
 	done
 
-install-i18n : all-i18n install-common
+install-i18n : all-i18n
+	$(INSTALL) -d $(DESTDIR)$(BINDIR)
+	$(INSTALL) -d $(DESTDIR)$(MANDIR)/man8
+	$(INSTALL) -m 644 $(MAN)/dnsmasq.8 $(DESTDIR)$(MANDIR)/man8 
+	$(INSTALL) -m 755 $(BUILDDIR)/dnsmasq $(DESTDIR)$(BINDIR)
 	cd $(BUILDDIR); $(top)/bld/install-mo $(DESTDIR)$(LOCALEDIR) $(INSTALL)
 	cd $(MAN); ../bld/install-man $(DESTDIR)$(MANDIR) $(INSTALL)
 

bld/Android.mk

@@ -11,14 +11,14 @@ LOCAL_SRC_FILES :=  bpf.c cache.c dbus.c dhcp.c dnsmasq.c \
 		    radv.c slaac.c auth.c ipset.c domain.c \
 	            dnssec.c dnssec-openssl.c blockdata.c tables.c \
 		    loop.c inotify.c poll.c rrfilter.c edns0.c arp.c \
-		    crypto.c dump.c ubus.c metrics.c hash-questions.c \
-                    domain-match.c
+		    crypto.c dump.c ubus.c metrics.c \
+                    domain-match.c nftset.c
 
 LOCAL_MODULE := dnsmasq
 
 LOCAL_C_INCLUDES := external/dnsmasq/src
 
-LOCAL_CFLAGS := -O2 -g -W -Wall -D__ANDROID__ -DNO_IPV6 -DNO_TFTP -DNO_SCRIPT
+LOCAL_CFLAGS := -O2 -g -W -Wall -D__ANDROID__ -DNO_TFTP -DNO_SCRIPT
 LOCAL_SYSTEM_SHARED_LIBRARIES := libc libcutils
 
 LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog

debian

@@ -0,0 +1 @@
+submodules/dnsmasq-debian/debian

debian/control

@@ -1,68 +0,0 @@
-Source: dnsmasq
-Section: net
-Priority: optional
-Build-Depends: dh-exec, gettext, libnetfilter-conntrack-dev [linux-any],
-               libidn2-dev, libdbus-1-dev (>=0.61), libgmp-dev,
-               nettle-dev (>=2.4-3), libbsd-dev [kfreebsd-any],
-	       liblua5.4-dev, dh-runit, debhelper-compat (= 13),
-               pkg-config, libnftables-dev
-Maintainer: Simon Kelley <simon@thekelleys.org.uk>
-Homepage: https://www.thekelleys.org.uk/dnsmasq/doc.html
-Vcs-Git: https://thekelleys.org.uk/git/dnsmasq.git
-Vcs-Browser: https://thekelleys.org.uk/gitweb/?p=dnsmasq.git
-Standards-Version: 4.6.2
-Rules-Requires-Root: no
-
-Package: dnsmasq
-Architecture: all
-Pre-Depends: ${misc:Pre-Depends}
-Depends: netbase, dnsmasq-base,
-         ${misc:Depends}
-Suggests: resolvconf
-Breaks: ${runit:Breaks}
-Conflicts: resolvconf (<<1.15), ${runit:Conflicts}
-Description: Small caching DNS proxy and DHCP/TFTP server - system daemon
- Dnsmasq is a lightweight, easy to configure, DNS forwarder and DHCP
- server. It is designed to provide DNS and optionally, DHCP, to a
- small network. It can serve the names of local machines which are
- not in the global DNS. The DHCP server integrates with the DNS
- server and allows machines with DHCP-allocated addresses
- to appear in the DNS with names configured either in each host or
- in a central configuration file. Dnsmasq supports static and dynamic
- DHCP leases and BOOTP/TFTP for network booting of diskless machines.
-
-Package: dnsmasq-base
-Architecture: any
-Depends: ${misc:Depends}, ${shlibs:Depends}
-Breaks: dnsmasq (<< 2.63-1~)
-Replaces: dnsmasq (<< 2.63-1~), dnsmasq-base
-Recommends: dns-root-data
-Provides: dnsmasq-base
-Conflicts: dnsmasq-base-lua
-Description: Small caching DNS proxy and DHCP/TFTP server - executable
- This package contains the dnsmasq executable and documentation, but
- not the infrastructure required to run it as a system daemon. For
- that, install the dnsmasq package.
-
-Package: dnsmasq-base-lua
-Architecture: any
-Depends: ${misc:Depends}, ${shlibs:Depends}
-Breaks: dnsmasq (<< 2.63-1~)
-Replaces: dnsmasq (<< 2.63-1~), dnsmasq-base
-Recommends: dns-root-data
-Provides: dnsmasq-base
-Conflicts: dnsmasq-base
-Description: Small caching DNS proxy and DHCP/TFTP server - executable, Lua-enabled
- This package contains the dnsmasq executable and documentation, but
- not the infrastructure required to run it as a system daemon. For
- that, install the dnsmasq package. This package is an alternative
- to dnsmasq-base which includes the Lua interpreter.
-
-Package: dnsmasq-utils
-Architecture: linux-any
-Depends: ${misc:Depends}, ${shlibs:Depends}
-Conflicts: dnsmasq (<<2.40)
-Description: Utilities for manipulating DHCP leases
- Small utilities to query a DHCP server's lease database and
- remove leases from it. These programs are distributed with dnsmasq
- and may not work correctly with other DHCP servers.

debian/copyright

@@ -1,58 +0,0 @@
-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: dnsmasq
-Upstream-Contact: Simon Kelley <simon@thekelleys.org.uk>
-Source: https://thekelleys.org.uk/dnsmasq/
-
-Files: *
-Copyright: 2000-2024 Simon Kelley <simon@thekelleys.org.uk>
-License: GPL-2 or GPL-3
-
-Files: src/dnssec.c
-Copyright: 2012-2024 Simon Kelley <simon@thekelleys.org.uk>
-           2012      Giovanni Bajo <rasky@develer.com>
-
-Files: debian/*
-Copyright: 2004-2024 Simon Kelley <simon@thekelleys.org.uk>
-           2012      Lars Bahner <bahner@debian.org>
-           2024      Sven Geuer <debmaint@g-e-u-e-r.de>
-License: GPL-2 or GPL-3
-
-License: GPL-2
- This program is free software; you can redistribute it
- and/or modify it under the terms of the GNU General Public
- License as published by the Free Software Foundation;
- version 2 dated June, 1991.
- .
- This program is distributed in the hope that it will be
- useful, but WITHOUT ANY WARRANTY; without even the implied
- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- PURPOSE.  See the GNU General Public License for more
- details.
- .
- You should have received a copy of the GNU General Public
- License along with this program.  If not, see
- <https://www.gnu.org/licenses/gpl-2.0>.
- .
- On Debian systems, the full text of the GNU General Public
- License can be found in the file
- `/usr/share/common-licenses/GPL-2'.
-
-License: GPL-3
- This program is free software; you can redistribute it
- and/or modify it under the terms of the GNU General Public
- License as published by the Free Software Foundation;
- version 3 dated 29 June, 2007.
- .
- This program is distributed in the hope that it will be
- useful, but WITHOUT ANY WARRANTY; without even the implied
- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- PURPOSE.  See the GNU General Public License for more
- details.
- .
- You should have received a copy of the GNU General Public
- License along with this program.  If not, see
- <https://www.gnu.org/licenses/gpl-3.0>.
- .
- On Debian systems, the full text of the GNU General Public
- License can be found in the file
- `/usr/share/common-licenses/GPL-3'.

debian/dbus.conf

@@ -1,18 +0,0 @@
-<!DOCTYPE busconfig PUBLIC
- "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
- "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
-<busconfig>
-	<policy user="root">
-		<allow own="uk.org.thekelleys.dnsmasq"/>
-		<allow send_destination="uk.org.thekelleys.dnsmasq"/>
-	</policy>
-        <policy user="dnsmasq">
-                <allow own="uk.org.thekelleys.dnsmasq"/>
-                <allow send_destination="uk.org.thekelleys.dnsmasq"/>
-        </policy>
-	<policy context="default">
-                <deny own="uk.org.thekelleys.dnsmasq"/>
-                <deny send_destination="uk.org.thekelleys.dnsmasq"/>
-        </policy>
-</busconfig>
-

debian/dnsmasq-base-lua.dirs

@@ -1 +0,0 @@
-dnsmasq-base.dirs

debian/dnsmasq-base-lua.docs

@@ -1 +0,0 @@
-dnsmasq-base.docs

debian/dnsmasq-base-lua.install

@@ -1,3 +0,0 @@
-#!/usr/bin/dh-exec
-debian/dbus.conf => /usr/share/dbus-1/system.d/dnsmasq.conf
-trust-anchors.conf /usr/share/dnsmasq-base-lua

debian/dnsmasq-base-lua.links

@@ -1,2 +0,0 @@
-usr/share/dnsmasq-base-lua usr/share/dnsmasq-base
-usr/share/doc/dnsmasq-base-lua usr/share/doc/dnsmasq-base

debian/dnsmasq-base-lua.maintscript

@@ -1,9 +0,0 @@
-# With the use of debhelper /usr/share/doc/dnsmasq-base-lua has become a
-# directory as required in
-# https://www.debian.org/doc/debian-policy/ch-docs.html#additional-documentation
-# thus /usr/share/doc/dnsmasq-base will be a link from now onwards.
-symlink_to_dir /usr/share/doc/dnsmasq-base-lua /usr/share/doc/dnsmasq-base 2.89-1.1~ dnsmasq-base-lua
-dir_to_symlink /usr/share/doc/dnsmasq-base /usr/share/doc/dnsmasq-base-lua 2.89-1.1~ dnsmasq-base-lua
-# Due to lintian warning dbus-policy-in-etc this file has been moved to
-# /usr/share/dbus-1/system.d/dnsmasq.conf and thus is not a conffile any more.
-rm_conffile /etc/dbus-1/system.d/dnsmasq.conf 2.89-1.1~ dnsmasq-base-lua

debian/dnsmasq-base-lua.postinst

@@ -1 +0,0 @@
-dnsmasq-base.postinst

debian/dnsmasq-base-lua.postrm

@@ -1 +0,0 @@
-dnsmasq-base.postrm

debian/dnsmasq-base.dirs

@@ -1 +0,0 @@
-/var/lib/misc

debian/dnsmasq-base.docs

@@ -1,8 +0,0 @@
-doc.html
-setup.html
-dnsmasq.conf.example
-FAQ
-CHANGELOG.archive
-dbus/DBus-interface
-debian/systemd_howto
-debian/readme

debian/dnsmasq-base.install

@@ -1,3 +0,0 @@
-#!/usr/bin/dh-exec
-debian/dbus.conf => /usr/share/dbus-1/system.d/dnsmasq.conf
-trust-anchors.conf /usr/share/dnsmasq-base

debian/dnsmasq-base.maintscript

@@ -1,3 +0,0 @@
-# Due to lintian warning dbus-policy-in-etc this file has been moved to
-# /usr/share/dbus-1/system.d/dnsmasq.conf and thus is not a conffile any more.
-rm_conffile /etc/dbus-1/system.d/dnsmasq.conf 2.89-1.1~ dnsmasq-base

debian/dnsmasq-base.postinst

@@ -1,30 +0,0 @@
-#!/bin/sh
-set -e
-
-# Create the dnsmasq user in dnsmasq-base, so that Dbus doesn't complain.
-
-if [ "$1" = "configure" ]; then
-  # Create the user to run as.
-  if [ -z "`id -u dnsmasq 2> /dev/null`" ]; then
-    useradd --system \
-            --gid nogroup \
-            --comment dnsmasq \
-            --home-dir /var/lib/misc --no-create-home \
-            --shell /usr/sbin/nologin \
-            dnsmasq
-  fi
-
-  # Make the directory where we keep the pid file - this
-  # has to be owned by "dnsmasq" so that the file can be unlinked.
-  # This is only actually used by the dnsmasq binary package, not
-  # dnsmasq-base, but it's much easier to create it here so that
-  # we don't have synchronisation issues with the creation of the
-  # dnsmasq user.
-  if [ ! -d /run/dnsmasq ]; then
-    mkdir /run/dnsmasq
-    chown dnsmasq:nogroup /run/dnsmasq
-  fi
-fi
-
-#DEBHELPER#
-

debian/dnsmasq-base.postrm

@@ -1,10 +0,0 @@
-#!/bin/sh
-set -e
-
-if [ purge = "$1" ]; then
-  userdel dnsmasq
-  rm -rf /run/dnsmasq
-fi
-
-#DEBHELPER#
-

debian/dnsmasq-utils.install

@@ -1,3 +0,0 @@
-dhcp_lease_time	/usr/bin
-dhcp_release	/usr/bin
-dhcp_release6	/usr/bin

debian/dnsmasq-utils.manpages

@@ -1,3 +0,0 @@
-dhcp_lease_time.1
-dhcp_release.1
-dhcp_release6.1

debian/dnsmasq.default

@@ -1,42 +0,0 @@
-# This file has six functions:
-# 1) to completely disable starting this dnsmasq instance
-# 2) to set DOMAIN_SUFFIX by running `dnsdomainname`
-# 3) to select an alternative config file
-#    by setting DNSMASQ_OPTS to --conf-file=<file>
-# 4) to tell dnsmasq to read the files in /etc/dnsmasq.d for
-#    more configuration variables.
-# 5) to stop the resolvconf package from controlling dnsmasq's
-#    idea of which upstream nameservers to use.
-# 6) to avoid using this dnsmasq instance as the system's default resolver
-#    by setting DNSMASQ_EXCEPT="lo"
-# For upgraders from very old versions, all the shell variables set
-# here in previous versions are still honored by the init script
-# so if you just keep your old version of this file nothing will break.
-
-#DOMAIN_SUFFIX=`dnsdomainname`
-#DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
-
-# The dnsmasq daemon is run by default conforming to the Debian Policy.
-# To disable the service,
-# for SYSV init, use "update-rc.d dnsmasq disable",
-# for systemd, use "systemctl disable dnsmasq".
-
-# By default search this drop directory for configuration options.
-# Libvirt leaves a file here to make the system dnsmasq play nice.
-# Comment out this line if you don't want this. The dpkg-* are file
-# endings which cause dnsmasq to skip that file. This avoids pulling
-# in backups made by dpkg.
-CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
-
-# If the resolvconf package is installed, dnsmasq will use its output
-# rather than the contents of /etc/resolv.conf to find upstream
-# nameservers. Uncommenting this line inhibits this behaviour.
-# Note that including a "resolv-file=<filename>" line in
-# /etc/dnsmasq.conf is not enough to override resolvconf if it is
-# installed: the line below must be uncommented.
-#IGNORE_RESOLVCONF=yes
-
-# If the resolvconf package is installed, dnsmasq will tell resolvconf
-# to use dnsmasq under 127.0.0.1 as the system's default resolver.
-# Uncommenting this line inhibits this behaviour.
-#DNSMASQ_EXCEPT="lo"

debian/dnsmasq.init

@@ -1,170 +0,0 @@
-#!/bin/sh
-### BEGIN INIT INFO
-# Provides:       dnsmasq
-# Required-Start: $network $remote_fs $syslog
-# Required-Stop:  $network $remote_fs $syslog
-# Default-Start:  2 3 4 5
-# Default-Stop:   0 1 6
-# Description:    DHCP and DNS server
-### END INIT INFO
-
-# Don't exit on error status
-set +e
-
-# The following test ensures the dnsmasq service is not started, when the
-# package 'dnsmasq' is removed but not purged, even if the dnsmasq-base
-# package is still in place.
-if [ -r /usr/share/dnsmasq/init-system-common ]; then
-    # 'dnsmasq' is installed: source initial code used also with systemd.
-    . /usr/share/dnsmasq/init-system-common
-else
-    # 'dnsmasq' is removed but not purged, or damaged: do nothing.
-    exit 0
-fi
-
-# Double-check 'dnsmasq-base' or 'dnsmasq-base-lua' is installed.
-test -x ${DAEMON} || exit 0
-
-# Source the SysV init-functions which should always be available.
-. /lib/lsb/init-functions || exit 0
-
-start()
-{
-    # Return
-    #   0 if daemon has been started
-    #   1 if daemon was already running
-    #   2 if daemon could not be started
-
-    # /run may be volatile, so we need to ensure that
-    # /run/dnsmasq exists here as well as in postinst
-    if [ ! -d /run/dnsmasq ]; then
-        mkdir /run/dnsmasq || { [ -d /run/dnsmasq ] || return 2 ; }
-        chown dnsmasq:nogroup /run/dnsmasq || return 2
-    fi
-    [ -x /sbin/restorecon ] && /sbin/restorecon /run/dnsmasq
-
-    start-stop-daemon --start --quiet --pidfile /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid --exec ${DAEMON} --test > /dev/null || return 1
-    start-stop-daemon --start --quiet --pidfile /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid --exec ${DAEMON} -- \
-        -x /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid \
-        ${MAILHOSTNAME:+ -m ${MAILHOSTNAME}} \
-        ${MAILTARGET:+ -t ${MAILTARGET}} \
-        ${DNSMASQ_USER:+ -u ${DNSMASQ_USER}} \
-        ${DNSMASQ_INTERFACES:+ ${DNSMASQ_INTERFACES}} \
-        ${DHCP_LEASE:+ -l ${DHCP_LEASE}} \
-        ${DOMAIN_SUFFIX:+ -s ${DOMAIN_SUFFIX}} \
-        ${RESOLV_CONF:+ -r ${RESOLV_CONF}} \
-        ${CACHESIZE:+ -c ${CACHESIZE}} \
-        ${CONFIG_DIR:+ -7 ${CONFIG_DIR}} \
-        ${DNSMASQ_OPTS:+ ${DNSMASQ_OPTS}} \
-        || return 2
-}
-
-stop()
-{
-    # Return
-    #   0 if daemon has been stopped
-    #   1 if daemon was already stopped
-    #   2 if daemon could not be stopped
-    #   other if a failure occurred
-    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid --name ${NAME}
-}
-
-status()
-{
-    # Return
-    #   0 if daemon is running
-    #   1 if daemon is dead and pid file exists
-    #   3 if daemon is not running
-    #   4 if daemon status is unknown
-    start-stop-daemon --start --quiet --pidfile /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid --exec ${DAEMON} --test > /dev/null
-    case "${?}" in
-      0) [ -e "/run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid" ] && return 1 ; return 3 ;;
-      1) return 0 ;;
-      *) return 4 ;;
-    esac
-}
-
-case "${1}" in
-  start)
-    log_daemon_msg "Starting ${DESC}" "${NAME}${INSTANCE:+.${INSTANCE}}"
-    start
-    case "${?}" in
-      0)
-        log_end_msg 0
-        start_resolvconf
-        exit 0
-        ;;
-      1)
-        log_success_msg "(already running)"
-        exit 0
-        ;;
-      *)
-        log_end_msg 1
-        exit 1
-        ;;
-    esac
-    ;;
-  stop)
-    stop_resolvconf
-    log_daemon_msg "Stopping ${DESC}" "${NAME}${INSTANCE:+.${INSTANCE}}"
-    stop
-    RETVAL="${?}"
-    case "${RETVAL}" in
-      0) log_end_msg 0 ; exit 0 ;;
-      1) log_warning_msg "(not running)" ; exit 0 ;;
-      *) log_end_msg 1; exit 1 ;;
-    esac
-    ;;
-  restart|force-reload)
-    checkconfig
-    if [ ${?} -ne 0 ]; then
-        NAME="configuration syntax check"
-        RETVAL="2"
-    else
-        stop_resolvconf
-        stop
-        RETVAL="${?}"
-    fi
-    log_daemon_msg "Restarting ${DESC}" "${NAME}${INSTANCE:+.${INSTANCE}}"
-    case "${RETVAL}" in
-      0|1)
-        sleep 2
-        start
-        case "${?}" in
-          0)
-            log_end_msg 0
-            start_resolvconf
-            exit 0
-            ;;
-          *)
-            log_end_msg 1
-            exit 1
-            ;;
-        esac
-        ;;
-      *)
-        log_end_msg 1
-        exit 1
-        ;;
-    esac
-    ;;
-  status)
-    log_daemon_msg "Checking ${DESC}" "${NAME}${INSTANCE:+.${INSTANCE}}"
-    status
-    case "${?}" in
-      0) log_success_msg "(running)" ; exit 0 ;;
-      1) log_success_msg "(dead, pid file exists)" ; exit 1 ;;
-      3) log_success_msg "(not running)" ; exit 3 ;;
-      *) log_success_msg "(unknown)" ; exit 4 ;;
-    esac
-    ;;
-  dump-stats)
-    kill -s USR1 `cat /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid`
-    ;;
-  *)
-    echo "Usage: /etc/init.d/${NAME} {start|stop|restart|force-reload|dump-stats|status}" >&2
-    exit 3
-    ;;
-esac
-
-exit 0

debian/dnsmasq.install

@@ -1,8 +0,0 @@
-#!/usr/bin/dh-exec
-debian/resolvconf => /etc/resolvconf/update.d/dnsmasq
-debian/resolvconf-package => /usr/lib/resolvconf/dpkg-event.d/dnsmasq
-debian/init-system-common => /usr/share/dnsmasq/init-system-common
-debian/systemd-helper => /usr/share/dnsmasq/systemd-helper
-dnsmasq.conf.example => /etc/dnsmasq.conf
-debian/readme.dnsmasq.d => /etc/dnsmasq.d/README
-debian/insserv => /etc/insserv.conf.d/dnsmasq

debian/dnsmasq.links

@@ -1 +0,0 @@
-usr/share/dnsmasq-base/trust-anchors.conf usr/share/dnsmasq/trust-anchors.conf

debian/dnsmasq.maintscript

@@ -1,2 +0,0 @@
-# /usr/share/doc/dnsmasq was a symlink in versions < 2.81-1 (see #985282)
-symlink_to_dir /usr/share/doc/dnsmasq dnsmasq-base 2.84-1.2~ dnsmasq

debian/dnsmasq.runit

@@ -1 +0,0 @@
-debian/dnsmasq.runscript name=dnsmasq,logscript,presubj

debian/dnsmasq.runscript/finish

@@ -1,5 +0,0 @@
-#!/bin/sh -eu
-if [ -x /sbin/resolvconf ] ; then
-	/sbin/resolvconf -d lo.dnsmasq
-fi
-

debian/dnsmasq.runscript/run

@@ -1,43 +0,0 @@
-#!/lib/runit/invoke-run
-
-readonly name=dnsmasq
-readonly daemon=/usr/sbin/dnsmasq
-readonly marker=/usr/share/dnsmasq/installed-marker
-
-test -e "${marker}" || exec sv down "${name}"
-test -x "${daemon}" || exec sv down "${name}"
-
-if [ ! "${RESOLV_CONF:-}" ] &&
-   [ "${IGNORE_RESOLVCONF:-}" != "yes" ] &&
-   [ -x /sbin/resolvconf ]
-then
-	RESOLV_CONF=/run/dnsmasq/resolv.conf
-fi
-
-# This tells dnsmasq to ignore DNS requests that don't come from a local network.
-# It's automatically ignored if  --interface --except-interface, --listen-address
-# or --auth-server exist in the configuration, so for most installations, it will
-# have no effect, but for otherwise-unconfigured installations, it stops dnsmasq
-# from being vulnerable to DNS-reflection attacks.
-
-DNSMASQ_OPTS="${DNSMASQ_OPTS:-} --local-service"
-
-# If the dns-root-data package is installed, then the trust anchors will be
-# available in $ROOT_DS, in BIND zone-file format. Reformat as dnsmasq
-# --trust-anchor options.
-
-ROOT_DS="/usr/share/dns/root.ds"
-
-if [ -f $ROOT_DS ]; then
-    DNSMASQ_OPTS="$DNSMASQ_OPTS `env LC_ALL=C sed -rne "s/^([.a-zA-Z0-9]+)([[:space:]]+[0-9]+)*([[:space:]]+IN)*[[:space:]]+DS[[:space:]]+/--trust-anchor=\1,/;s/[[:space:]]+/,/gp" $ROOT_DS | tr '\n' ' '`"
-fi
-
-mkdir -p /run/dnsmasq
-chown dnsmasq:nogroup /run/dnsmasq
-[ -x /sbin/restorecon ] && /sbin/restorecon /run/dnsmasq
-exec "${daemon}" \
-	--keep-in-foreground \
-	--log-facility=/dev/stdout \
-	${RESOLV_CONF:+ -r $RESOLV_CONF} \
-	${DNSMASQ_OPTS} \
-	-u dnsmasq

debian/dnsmasq.service

@@ -1,31 +0,0 @@
-[Unit]
-Description=dnsmasq - A lightweight DHCP and caching DNS server
-Requires=network.target
-Wants=nss-lookup.target
-Before=nss-lookup.target
-After=network.target
-
-[Service]
-Type=forking
-PIDFile=/run/dnsmasq/dnsmasq.pid
-
-# Test the config file and refuse starting if it is not valid.
-ExecStartPre=/usr/share/dnsmasq/systemd-helper checkconfig
-
-# We run dnsmasq via the /usr/share/dnsmasq/systemd-helper script which acts
-# as a wrapper picking up extra configuration files and then execs dnsmasq
-# itself, when called with the "exec" function.
-ExecStart=/usr/share/dnsmasq/systemd-helper exec
-
-# The *-resolvconf functions configure (and deconfigure)
-# resolvconf to work with the dnsmasq DNS server. They're called like
-# this to get correct error handling (ie don't start-resolvconf if the
-# dnsmasq daemon fails to start).
-ExecStartPost=/usr/share/dnsmasq/systemd-helper start-resolvconf
-ExecStop=/usr/share/dnsmasq/systemd-helper stop-resolvconf
-
-
-ExecReload=/bin/kill -HUP $MAINPID
-
-[Install]
-WantedBy=multi-user.target

debian/dnsmasq.tmpfiles

@@ -1 +0,0 @@
-d /run/dnsmasq 755 dnsmasq nogroup

debian/dnsmasq@.service

@@ -1,31 +0,0 @@
-[Unit]
-Description=dnsmasq (%i) - A lightweight DHCP and caching DNS server
-Requires=network.target
-Wants=nss-lookup.target
-Before=nss-lookup.target
-After=network.target
-
-[Service]
-Type=forking
-PIDFile=/run/dnsmasq/dnsmasq.%i.pid
-
-# Test the config file and refuse starting if it is not valid.
-ExecStartPre=/usr/share/dnsmasq/systemd-helper checkconfig "%i"
-
-# We run dnsmasq via the /usr/share/dnsmasq/systemd-helper script which acts
-# as a wrapper picking up extra configuration files and then execs dnsmasq
-# itself, when called with the "exec" function.
-ExecStart=/usr/share/dnsmasq/systemd-helper exec "%i"
-
-# The *-resolvconf functions configure (and deconfigure)
-# resolvconf to work with the dnsmasq DNS server. They're called like
-# this to get correct error handling (ie don't start-resolvconf if the
-# dnsmasq daemon fails to start).
-ExecStartPost=/usr/share/dnsmasq/systemd-helper start-resolvconf "%i"
-ExecStop=/usr/share/dnsmasq/systemd-helper stop-resolvconf "%i"
-
-
-ExecReload=/bin/kill -HUP $MAINPID
-
-[Install]
-WantedBy=multi-user.target

debian/init-system-common

@@ -1,102 +0,0 @@
-# -*- shell-script -*-
-PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
-DAEMON=/usr/sbin/dnsmasq
-NAME=dnsmasq
-DESC="DNS forwarder and DHCP server"
-INSTANCE="${2}"
-
-# Most configuration options in /etc/default/dnsmasq are deprecated
-# but still honoured.
-if [ -r /etc/default/${NAME}${INSTANCE:+.${INSTANCE}} ]; then
-    . /etc/default/${NAME}${INSTANCE:+.${INSTANCE}}
-fi
-
-# Get the system locale, so that messages are in the correct language, and the
-# charset for IDN is correct
-if [ -r /etc/default/locale ]; then
-    . /etc/default/locale
-    export LANG
-fi
-
-# RESOLV_CONF:
-# If the resolvconf package is installed then use the resolv conf file
-# that it provides as the default.  Otherwise use /etc/resolv.conf as
-# the default.
-#
-# If IGNORE_RESOLVCONF is set in /etc/default/dnsmasq or an explicit
-# filename is set there then this inhibits the use of the resolvconf-provided
-# information.
-#
-# Note that if the resolvconf package is installed it is not possible to
-# override it just by configuration in /etc/dnsmasq.conf, it is necessary
-# to set IGNORE_RESOLVCONF=yes in /etc/default/dnsmasq.
-
-if [ ! "${RESOLV_CONF}" ] &&
-   [ "${IGNORE_RESOLVCONF}" != "yes" ] &&
-   [ -x /sbin/resolvconf ]
-then
-    RESOLV_CONF=/run/dnsmasq/resolv.conf
-fi
-
-for INTERFACE in ${DNSMASQ_INTERFACE}; do
-    DNSMASQ_INTERFACES="${DNSMASQ_INTERFACES} -i ${INTERFACE}"
-done
-
-for INTERFACE in ${DNSMASQ_EXCEPT}; do
-    DNSMASQ_INTERFACES="${DNSMASQ_INTERFACES} -I ${INTERFACE}"
-done
-
-if [ ! "${DNSMASQ_USER}" ]; then
-    DNSMASQ_USER="dnsmasq"
-fi
-
-# This tells dnsmasq to ignore DNS requests that don't come from a local network.
-# It's automatically ignored if --interface --except-interface, --listen-address
-# or --auth-server exist in the configuration, so for most installations, it will
-# have no effect, but for otherwise-unconfigured installations, it stops dnsmasq
-# from being vulnerable to DNS-reflection attacks.
-
-DNSMASQ_OPTS="${DNSMASQ_OPTS} --local-service"
-
-# If the dns-root-data package is installed, then the trust anchors will be
-# available in ROOT_DS, in BIND zone-file format. Reformat as dnsmasq
-# --trust-anchor options.
-
-ROOT_DS="/usr/share/dns/root.ds"
-
-if [ -f ${ROOT_DS} ]; then
-    DNSMASQ_OPTS="$DNSMASQ_OPTS `env LC_ALL=C sed -rne "s/^([.a-zA-Z0-9]+)([[:space:]]+[0-9]+)*([[:space:]]+IN)*[[:space:]]+DS[[:space:]]+/--trust-anchor=\1,/;s/[[:space:]]+/,/gp" $ROOT_DS | tr '\n' ' '`"
-fi
-
-checkconfig()
-{
-    ${DAEMON} --test ${CONFIG_DIR:+ -7 ${CONFIG_DIR}} ${DNSMASQ_OPTS:+ ${DNSMASQ_OPTS}} >/dev/null 2>&1
-}
-
-start_resolvconf()
-{
-# If interface "lo" is explicitly disabled in /etc/default/dnsmasq
-# Then dnsmasq won't be providing local DNS, so don't add it to
-# the resolvconf server set.
-    for interface in ${DNSMASQ_EXCEPT}; do
-        [ ${interface} = lo ] && return
-    done
-
-    # Also skip this if DNS functionality is disabled in /etc/dnsmasq.conf
-    if grep -qs '^port=0' /etc/dnsmasq.conf; then
-        return
-    fi
-
-    if [ -x /sbin/resolvconf ] ; then
-        echo "nameserver 127.0.0.1" | /sbin/resolvconf -a lo.${NAME}${INSTANCE:+.${INSTANCE}}
-    fi
-    return 0
-}
-
-stop_resolvconf()
-{
-    if [ -x /sbin/resolvconf ] ; then
-        /sbin/resolvconf -d lo.${NAME}${INSTANCE:+.${INSTANCE}}
-    fi
-    return 0
-}

debian/insserv

@@ -1 +0,0 @@
-$named dnsmasq

debian/patches/eliminate-privacy-breaches.patch

@@ -1,40 +0,0 @@
-Description: Remove or replace privacy breaching logos and forms
- Lintian complains about these by issuing the tags privacy-breach-logo and
- privacy-breach-donation.
-Forwarded: not-needed
-Author: Sven Geuer <debmaint@g-e-u-e-r.de>
-Last-Update: 2023-11-18
-
---- a/doc.html
-+++ b/doc.html
-@@ -1,14 +1,11 @@
- <HTML>
- <HEAD>
- <TITLE> Dnsmasq - network services for small networks.</TITLE>
--<link rel="icon" href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
- </HEAD>
- <BODY BGCOLOR="WHITE"> 
- <table width="100%" border="0" cellpadding="0" cellspacing="0">
- <tr>
--<td align="left" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td>
- <td align="middle" valign="middle"><h1>Dnsmasq</h1></td>
--<td align="right" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td></tr>
- </table>
- Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be 
- lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used 
-@@ -88,14 +85,6 @@
- Dnsmasq is mainly written and maintained by Simon Kelley. For most of its life, dnsmasq has been a spare-time project. 
- These days I'm working on it as my main activity. 
- I don't have an employer or anyone who pays me regularly to work on dnsmasq. If you'd like to make 
--a contribution towards my expenses, please use the donation button below.
--<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top">
--<input type="hidden" name="cmd" value="_s-xclick">
--<input type="hidden" name="hosted_button_id" value="V3X9GVW5GX6DA">
--<input type="image" src="https://www.paypalobjects.com/en_US/GB/i/btn/btn_donateCC_LG.gif" border="0" name="submit" alt="PayPal – The safer, easier way to pay online.">
--<img alt="" border="0" src="https://www.paypalobjects.com/en_GB/i/scr/pixel.gif" width="1" height="1">
--</form>
--
--
-+a contribution towards my expenses, please use the donation button at <A HREF="https://www.thekelleys.org.uk/dnsmasq/doc.html">the project's home page</A>.
- </BODY>
- 

debian/patches/series

@@ -1 +0,0 @@
-eliminate-privacy-breaches.patch

debian/readme

@@ -1,80 +0,0 @@
-Notes on configuring dnsmasq as packaged for Debian.
-
-(1) To configure dnsmasq edit /etc/dnsmasq.conf. The file is well
-    commented; see also the dnsmasq.8 man page for explanation of
-    the options. The file /etc/default/dnsmasq also exists but it
-    shouldn't need to be touched in most cases. To set up DHCP
-    options you might need to refer to a copy of RFC 2132. This is
-    available on Debian systems in the package doc-rfc-std as the file
-    /usr/share/doc/RFC/draft-standard/rfc2132.txt.gz .
-
-(2) Installing the dnsmasq package also creates the directory
-    /etc/dnsmasq.d which is searched by dnsmasq for configuration file
-    fragments. This behaviour can be disabled by editing
-    /etc/default/dnsmasq.
-
-(3) If the Debian resolvconf package is installed then, regardless
-    of what interface configuration daemons are employed, the list of
-    nameservers to which dnsmasq should forward queries can be found
-    in /var/run/dnsmasq/resolv.conf; also, 127.0.0.1 is listed as the
-    first nameserver address in /etc/resolv.conf. This works using the
-    default configurations of resolvconf and dnsmasq.
-
-(4) In the absence of resolvconf, if you are using dhcpcd then
-    dnsmasq should read the list of nameservers from the automatically
-    generated file /etc/dhcpc/resolv.conf.  You should list 127.0.0.1
-    as the first nameserver address in /etc/resolv.conf.
-
-(5) In the absence of resolvconf, if you are using pppd then
-    dnsmasq should read the list of nameservers from the automatically
-    generated file /etc/ppp/resolv.conf.  You should list 127.0.0.1
-    as the first nameserver address in /etc/resolv.conf.
-
-(6) In the absence of resolvconf, dns-nameservers lines in
-    /etc/network/interfaces are ignored. If you do not use
-    resolvconf, list 127.0.0.1 as the first nameserver address
-    in /etc/resolv.conf and configure your nameservers using
-    "server=<IP-address>" lines in /etc/dnsmasq.conf.
-
-(7) If you run multiple DNS servers on a single machine, each
-    listening on a different interface, then it is necessary to use
-    the bind-interfaces option by uncommenting "bind-interfaces" in
-    /etc/dnsmasq.conf. This option stops dnsmasq from binding the
-    wildcard address and allows servers listening on port 53 on
-    interfaces not in use by dnsmasq to work. The Debian
-    libvirt package will add a configuration file in /etc/dnsmasq.d
-    which does this so that the "system" dnsmasq and "private" dnsmasq
-    instances started by libvirt do not clash.
-
-(8) The following options are supported in DEB_BUILD_OPTIONS
-      noopt       : compile without optimisation.
-      nostrip     : don't remove symbols from binary.
-      nodocs      : omit documentation.
-      notftp      : omit TFTP support.
-      nodhcp      : omit DHCP support.
-      nodhcp6     : omit DHCPv6 support.
-      noscript    : omit lease-change script support.
-      uselua      : provide support for lease-change scripts written
-                    in Lua.
-      noipv6      : omit IPv6 support.
-      nodbus      : omit DBus support.
-      noconntrack : omit connection tracking support.
-      noipset     : omit IPset support.
-      nonftset    : omit nftset support.
-      nortc       : compile alternate mode suitable for systems without an RTC.
-      noi18n      : omit translations and internationalisation support.
-      noidn       : omit international domain name support, must be
-                    combined with noi18n to be effective.
-      gitversion  : set the version of the produced packages from the
-                    git-derived versioning information on the source,
-                    rather than the debian changelog.
-
-(9) Dnsmasq comes as three packages - dnsmasq-utils, dnsmasq-base and
-    dnsmasq. Dnsmasq-base provides the dnsmasq executable and
-    documentation (including this file). Dnsmasq, which depends on
-    dnsmasq-base, provides the init script and configuration
-    infrastructure. This file assumes that both are installed. It is
-    possible to install only dnsmasq-base and use dnsmasq as a
-    non-"system" daemon. Libvirt, for instance, does this.
-    Dnsmasq-utils provides the utilities dhcp_release and
-    dhcp_lease_time.

debian/readme.dnsmasq.d

@@ -1,7 +0,0 @@
-# All files in this directory will be read by dnsmasq as 
-# configuration files, except if their names end in 
-# ".dpkg-dist",".dpkg-old" or ".dpkg-new"
-#
-# This can be changed by editing /etc/default/dnsmasq
-
-

debian/resolvconf

@@ -1,84 +0,0 @@
-#!/bin/sh
-#
-# Script to update the resolver list for dnsmasq
-#
-# N.B. Resolvconf may run us even if dnsmasq is not (yet) running.
-# If dnsmasq is installed then we go ahead and update the resolver list
-# in case dnsmasq is started later.
-#
-# Assumption: On entry, PWD contains the resolv.conf-type files.
-#
-# This file is part of the dnsmasq package.
-#
-
-set -e
-
-RUN_DIR="/run/dnsmasq"
-RSLVRLIST_FILE="${RUN_DIR}/resolv.conf"
-TMP_FILE="${RSLVRLIST_FILE}_new.$$"
-MY_NAME_FOR_RESOLVCONF="dnsmasq"
-
-[ -x /usr/sbin/dnsmasq ] || exit 0
-[ -x /lib/resolvconf/list-records ] || exit 1
-
-PATH=/bin:/sbin
-
-report_err() { echo "$0: Error: $*" >&2 ; }
-
-# Stores arguments (minus duplicates) in RSLT, separated by spaces
-# Doesn't work properly if an argument itself contains whitespace
-uniquify()
-{
-	RSLT=""
-	while [ "$1" ] ; do
-		for E in $RSLT ; do
-			[ "$1" = "$E" ] && { shift ; continue 2 ; }
-		done
-		RSLT="${RSLT:+$RSLT }$1"
-		shift
-	done
-}
-
-if [ ! -d "$RUN_DIR" ] && ! mkdir --parents --mode=0755 "$RUN_DIR" ; then
-	report_err "Failed trying to create directory $RUN_DIR"
-	exit 1
-fi
-
-RSLVCNFFILES=""
-for F in $(/lib/resolvconf/list-records --after "lo.$MY_NAME_FOR_RESOLVCONF") ; do
-	case "$F" in
-	    "lo.$MY_NAME_FOR_RESOLVCONF")
-		# Omit own record
-		;;
-	    lo.*)
-		# Include no more records after one for a local nameserver
-		RSLVCNFFILES="${RSLVCNFFILES:+$RSLVCNFFILES }$F"
-		break
-		;;
-	  *)
-		RSLVCNFFILES="${RSLVCNFFILES:+$RSLVCNFFILES }$F"
-		;;
-	esac
-done
-
-NMSRVRS=""
-if [ "$RSLVCNFFILES" ] ; then
-	uniquify $(sed -n -e 's/^[[:space:]]*nameserver[[:space:]]\+//p' $RSLVCNFFILES)
-	NMSRVRS="$RSLT"
-fi
-
-# Dnsmasq uses the mtime of $RSLVRLIST_FILE, with a resolution of one second,
-# to detect changes in the file. This means that if a resolvconf update occurs
-# within one second of the previous one then dnsmasq may fail to notice the
-# more recent change. To work around this problem we sleep one second here
-# if necessary in order to ensure that the new mtime is different.
-if [ -f "$RSLVRLIST_FILE" ] && [ "$(ls -go --time-style='+%s' "$RSLVRLIST_FILE" | { read p h s t n ; echo "$t" ; })" = "$(date +%s)" ] ; then
-	sleep 1
-fi
-
-clean_up() { rm -f "$TMP_FILE" ; }
-trap clean_up EXIT
-: >| "$TMP_FILE"
-for N in $NMSRVRS ; do echo "nameserver $N" >> "$TMP_FILE" ; done
-mv -f "$TMP_FILE" "$RSLVRLIST_FILE"
-

debian/resolvconf-package

@@ -1,13 +0,0 @@
-#!/bin/sh
-# Resolvconf packaging event hook script for the dnsmasq package
-restart_dnsmasq() {
-    if which invoke-rc.d >/dev/null 2>&1 ; then
-        invoke-rc.d dnsmasq restart
-    elif [ -x /etc/init.d/dnsmasq ] ; then
-        /etc/init.d/dnsmasq restart
-    fi
-}
-
-case "$1" in
-  install) restart_dnsmasq ;;
-esac

debian/rules

@@ -1,127 +0,0 @@
-#!/usr/bin/make -f
-# -*- makefile -*-
-
-# Uncomment this to turn on verbose mode.
-export DH_VERBOSE=1
-
-# Make sure lintian does not complain about missing hardenings.
-export DEB_BUILD_MAINT_OPTIONS = hardening=+all
-
-include /usr/share/dpkg/architecture.mk
-
-PREFIX = /usr
-# Upstream does not handle CPPFLAGS, so we add it to CFLAGS here.
-CFLAGS += $(CPPFLAGS)
-COPTS =
-
-ifeq (,$(filter nodbus,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DHAVE_DBUS
-endif
-
-ifeq (,$(filter noidn, $(DEB_BUILD_OPTIONS)))
-	COPTS += -DHAVE_LIBIDN2
-endif
-
-ifeq (,$(filter nonftset, $(DEB_BUILD_OPTIONS)))
-	COPTS += -DHAVE_NFTSET
-endif
-
-ifeq (,$(filter noconntrack,$(DEB_BUILD_OPTIONS)))
-ifeq ($(DEB_HOST_ARCH_OS),linux)
-	COPTS += -DHAVE_CONNTRACK
-endif
-endif
-
-ifneq (,$(filter noipset,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DNO_IPSET
-endif
-
-ifneq (,$(filter nodhcp6,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DNO_DHCP6
-endif
-
-ifneq (,$(filter noipv6,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DNO_IPV6
-endif
-
-ifneq (,$(filter notftp,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DNO_TFTP
-endif
-
-ifneq (,$(filter nodhcp,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DNO_DHCP
-endif
-
-ifneq (,$(filter noscript,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DNO_SCRIPT
-endif
-
-ifneq (,$(filter nortc,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DHAVE_BROKEN_RTC
-endif
-
-ifeq (,$(filter nodnssec,$(DEB_BUILD_OPTIONS)))
-	COPTS += -DHAVE_DNSSEC
-endif
-
-
-%:
-	# Ubuntu and derivates do not support runit, see
-	# https://bugs.debian.org/960401 for details.
-	if dpkg-vendor --derives-from Ubuntu; then \
-		dh $@; \
-	else \
-		dh $@ --with runit; \
-	fi
-
-# Upstream builds and installs in one go, so do we.
-override_dh_auto_build:
-
-override_dh_auto_install:
-	dh_auto_build -p dnsmasq-base --no-parallel -- install-i18n \
-		BUILDDIR=debian/auto-build/dnsmasq-base \
-		DESTDIR=$(CURDIR)/debian/dnsmasq-base \
-		PREFIX=$(PREFIX) CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" \
-		COPTS="$(COPTS)"
-	dh_auto_build -p dnsmasq-base-lua --no-parallel -- install-i18n \
-		BUILDDIR=debian/auto-build/dnsmasq-base-lua \
-		DESTDIR=$(CURDIR)/debian/dnsmasq-base-lua \
-		PREFIX=$(PREFIX) CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" \
-		COPTS="$(COPTS) -DHAVE_LUASCRIPT"
-	dh_auto_build -p dnsmasq-utils -D contrib/lease-tools
-
-override_dh_auto_clean:
-	dh_auto_clean -p dnsmasq-base -- \
-		BUILDDIR=debian/auto-build/dnsmasq-base
-	dh_auto_clean -p dnsmasq-base-lua -- \
-		BUILDDIR=debian/auto-build/dnsmasq-base-lua
-	rm -rf debian/auto-build
-	dh_auto_clean -p dnsmasq-utils -D contrib/lease-tools
-
-override_dh_install:
-	dh_install -p dnsmasq-utils --sourcedir=contrib/lease-tools
-	dh_install --remaining-packages
-
-# If 'nodoc' is absent from DEB_BUILD_OPTIONS, Correct name or location of
-# some doc files.
-# We would prefer do this via dh-exec if it would support dh_installdocs.
-ifeq (,$(findstring nodoc,$(DEB_BUILD_OPTIONS)))
-execute_after_dh_installdocs:
-	for d in $(CURDIR)/debian/dnsmasq-base*/usr/share/doc/dnsmasq-base*; do \
-		cd $$d; \
-		mv readme README.Debian; \
-		mv CHANGELOG.archive changelog.archive; \
-		mkdir examples; \
-		mv dnsmasq.conf.example examples/; \
-	done
-endif
-
-# If 'nodoc' is present in DEB_BUILD_OPTIONS, drop the man pages already
-# installed by the upstream build script. Then, let dh_installman do what
-# else needs doing.
-override_dh_installman:
-ifneq (,$(findstring nodoc,$(DEB_BUILD_OPTIONS)))
-	rm -rf debian/dnsmasq-base*/usr/share/man
-endif
-	dh_installman -p dnsmasq-utils --sourcedir=contrib/lease-tools
-	dh_installman --remaining-packages

debian/source/format

@@ -1 +0,0 @@
-3.0 (quilt)

debian/systemd-helper

@@ -1,34 +0,0 @@
-#!/bin/sh
-
-. /usr/share/dnsmasq/init-system-common
-
-case "$1" in
-	checkconfig)
-		checkconfig
-		;;
-	start-resolvconf)
-		start_resolvconf
-		;;
-	stop-resolvconf)
-		stop_resolvconf
-		;;
-	exec)
-		# /run may be volatile, so we need to ensure that
-		# /run/dnsmasq exists here as well as in postinst
-		if [ ! -d /run/dnsmasq ]; then
-			mkdir /run/dnsmasq || { [ -d /run/dnsmasq ] || exit 2 ; }
-			chown dnsmasq:nogroup /run/dnsmasq || exit 2
-		fi
-		exec ${DAEMON} -x /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid \
-			${MAILHOSTNAME:+ -m ${MAILHOSTNAME}} \
-			${MAILTARGET:+ -t ${MAILTARGET}} \
-			${DNSMASQ_USER:+ -u ${DNSMASQ_USER}} \
-			${DNSMASQ_INTERFACES:+ ${DNSMASQ_INTERFACES}} \
-			${DHCP_LEASE:+ -l ${DHCP_LEASE}} \
-			${DOMAIN_SUFFIX:+ -s ${DOMAIN_SUFFIX}} \
-			${RESOLV_CONF:+ -r ${RESOLV_CONF}} \
-			${CACHESIZE:+ -c ${CACHESIZE}} \
-			${CONFIG_DIR:+ -7 ${CONFIG_DIR}} \
-			${DNSMASQ_OPTS:+ ${DNSMASQ_OPTS}}
-		;;
-esac

debian/systemd_howto

@@ -1,41 +0,0 @@
-HOWTO
-=====
-dnsmasq comes with the possibility to run multiple systemd service instances on the same machine.
-There is the main service which is enabled by default via `systemctl enable dnsmasq.service` and uses the configuration from `/etc/default/dnsmasq`.
-
-Additional service instances can be enabled via `systemctl enable dnsmasq@<instance name>.service` that use the configuration from `/etc/default/dnsmasq.<instance name>`.
-It is recommended to use a separate configuration file and directory for each instance.
-Additionally make sure that all instances use either different ports and/or ip addresses to avoid binding collisions.
-
-Example setup for an instance called "alt"
-#1 File `/etc/dnsmasq.alt.conf` copied from `/etc/dnsmasq.conf`
-#2 Directory `/etc/dnsmasq.alt.d`
-#3 File `/etc/default/dnsmasq.alt` copied from `/etc/default/dnsmasq` with following adaptions:
-   * The options DNSMASQ_OPTS and CONFIG_DIR point to the correct configuration file and directory.
-     DNSMASQ_OPTS="... --conf-file=/etc/dnsmasq.alt.conf ..."
-     CONFIG_DIR=/etc/dnsmasq.alt.d,.dpkg-dist,.dpkg-old,.dpkg-new
-   * The option DNSMASQ_EXCEPT must contain "lo" to avoid that an instance becomes the machine's DNS resolver.
-     DNSMASQ_EXCEPT="lo"
-  * If the additional instance should bind to all IP addresses of a specific interface, e.g. "dnsalt01", then the following addition could be used:
-    DNSMASQ_OPTS="... --bind-dynamic --interface=dnsalt01 ..."
-    Additionally the main instance must be stopped from binding to interfaces that are used by other instances:
-    DNSMASQ_OPTS="... --bind-dynamic --except-interface=dnsalt* ..."
-  * If the additional instance should not use the machine's DNS resolver, normally that's the dnsmasq main instance, as upstream server, then the following addition could be used:
-    IGNORE_RESOLVCONF=yes
-#4 Enable additional instance via `systemctl enable dnsmasq@alt.service`
-#5 Start additional instance without reboot via `systemctl start dnsmasq@alt.service`
-
-
-
-TODO
-====
-#1 - Found shortcoming on 2019-03-10
-Only the option DNSMASQ_EXCEPT="lo" avoids that an DNS instance will be set as the machine's DNS resolver.
-This may interfere with the wish to run an additional instance on a different port on the localhost addresses.
-My suggestion in the initial Debian report [1] was to specify an explicit variable for this.
-
-[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=914305#5
-
-
-#2 - Preferred configuration way
-Should the variables DNSMASQ_INTERFACE and DNSMASQ_EXCEPT be used instead of --interface and --except-interface?  (while "lo" still has to be in DNSMASQ_EXCEPT as of now)

debian/tests/compile-time-options

@@ -1,7 +0,0 @@
-#!/bin/sh
-
-set -e
-
-. debian/tests/functions
-
-check_compile_time_options

debian/tests/compile-time-options+lua

@@ -1,7 +0,0 @@
-#!/bin/sh
-
-set -e
-
-. debian/tests/functions
-
-check_compile_time_options +lua

debian/tests/control

@@ -1,39 +0,0 @@
-Tests: compile-time-options
-Depends: dnsmasq,
-         dnsmasq-base,
-Restrictions: needs-root,
-              isolation-container,
-
-Tests: compile-time-options+lua
-Depends: dnsmasq,
-         dnsmasq-base-lua,
-Restrictions: needs-root,
-              isolation-container,
-
-Tests: get-address+query-dns+check-utils
-Depends: bind9,
-         bind9-dnsutils,
-         dnsmasq,
-         dnsmasq-base,
-         dnsmasq-utils,
-Restrictions: needs-root,
-              allow-stderr,
-              isolation-container,
-
-Tests: get-address+query-dns+lua+alt
-Depends: bind9,
-         bind9-dnsutils,
-         dnsmasq,
-         dnsmasq-base-lua,
-Restrictions: needs-root,
-              allow-stderr,
-              isolation-container,
-
-Tests: get-address+query-dns+sysv+alt
-Depends: bind9,
-         bind9-dnsutils,
-         dnsmasq,
-         dnsmasq-base,
-Restrictions: needs-root,
-              allow-stderr,
-              isolation-container,

debian/tests/functions

@@ -1,151 +0,0 @@
-# -*- shell-script -*-
-
-FUNCTIONS_DIR="debian/tests/functions.d"
-
-match_or_exit () {
-	file_to_match="$1"
-	pattern_file="$2"
-
-	while read line_to_match <&3 && read pattern_line <&4 ; do
-		if [ "${line_to_match##$pattern_line}" ]; then
-			echo '!!! MISMATCH !!!' >&2
-			echo "Line:    ${line_to_match}" >&2
-			echo "Pattern: ${pattern_line}" >&2
-			exit 1
-		fi;
-	done 3<"${file_to_match}" 4<"${pattern_file}"
-}
-
-linecount () {
-	wc -l $1 | cut -d' ' -f1
-}
-
-error_exit () {
-	echo "ERROR: $1"
-	exit 1
-}
-
-stop_dnsmasq_bind_networking () {
-	systemctl stop dnsmasq.service
-	systemctl stop named.service
-	systemctl stop networking.service
-}
-
-configure_and_start_networking () {
-	#Add interfaces needed for the test
-	cat ${FUNCTIONS_DIR}/add-to.interfaces >> /etc/network/interfaces
-	systemctl start networking.service
-}
-
-configure_and_start_bind () {
-	cp ${FUNCTIONS_DIR}/db.autopkg.test /etc/bind/
-	cat ${FUNCTIONS_DIR}/add-to.named.conf.local >> /etc/bind/named.conf.local
-	cp ${FUNCTIONS_DIR}/named.conf.options /etc/bind/named.conf.options
-	systemctl start named.service
-}
-
-configure_and_start_dnsmasq () {
-	alt_mode=0
-	lua_mode=0
-	sysv_mode=0
-	service='dnsmasq.service'
-	sysv_param2=''
-	conf_dir='/etc/dnsmasq.d'
-
-	while [ -n "$1" ]; do
-		case "$1" in
-			alt|lua|sysv) eval ${1}_mode=1 ;;
-			*) error_exit "configure_and_start_dnsmasq(): invalid flag '$1'"
-		esac
-		shift
-	done
-
-	if [ ${alt_mode} -eq 1 ]; then
-		cp ${FUNCTIONS_DIR}/dnsmasq.alt-autopkgtest.default /etc/default/dnsmasq.alt
-		cp /etc/dnsmasq.conf /etc/dnsmasq.alt.conf
-		mkdir /etc/dnsmasq.alt.d
-		service='dnsmasq@alt.service'
-		sysv_param2='alt'
-		conf_dir='/etc/dnsmasq.alt.d'
-	fi
-
-	cp ${FUNCTIONS_DIR}/dnsmasq-autopkgtest.conf "${conf_dir}"
-
-	if [ ${lua_mode} -eq 1 ]; then
-		mkdir -p /usr/local/share/dnsmasq
-		cp ${FUNCTIONS_DIR}/log.lua /usr/local/share/dnsmasq/
-		echo "dhcp-luascript=/usr/local/share/dnsmasq/log.lua\n" \
-			>>"${conf_dir}"/dnsmasq-autopkgtest.conf
-	fi
-
-	if [ ${sysv_mode} -eq 1 ]; then
-		SYSTEMCTL_SKIP_REDIRECT=1 /etc/init.d/dnsmasq start "${sysv_param2}"
-	else
-		systemctl enable "${service}"
-		systemctl start "${service}"
-	fi
-}
-
-check_compile_time_options () {
-	journalctl -b -u dnsmasq
-	echo ~~~ Check compile time options...
-	journalctl -b -u dnsmasq -g '[a-z]+: ' --output cat >options.msg
-	cat options.msg
-	match_or_exit options.msg ${FUNCTIONS_DIR}/options${1}.patterns
-}
-
-get_address_on_veth1_and_check_the_result () {
-	echo ~~~ Get an address on veth1 and check the result...
-	ip netns exec clientnet ifup veth1
-	ip netns exec clientnet ip addr show dev veth1 >ip-addr.out 2>&1
-	cat ip-addr.out
-	match_or_exit ip-addr.out ${FUNCTIONS_DIR}/ip-addr.patterns
-}
-
-query_test_zone_records_and_check_the_result () {
-	echo ~~~ Query some test zone records and check the result...
-	ip netns exec clientnet dig +short SOA autopkg.test >dig.out 2>&1
-	ip netns exec clientnet dig +short NS autopkg.test >>dig.out 2>&1
-	ip netns exec clientnet dig +short A ns.autopkg.test >>dig.out 2>&1
-	ip netns exec clientnet dig +short A dhcp3.autopkg.test >>dig.out 2>&1
-	cat dig.out
-	if [ `linecount dig.out` -ne `linecount ${FUNCTIONS_DIR}/dig.patterns` ] ; then
-		error_exit 'empty or unexpected output'
-	fi
-	match_or_exit dig.out ${FUNCTIONS_DIR}/dig.patterns
-}
-
-check_utils () {
-	#Test dhcp_lease_time and dhcp_release
-	leases_file='/var/lib/misc/dnsmasq.leases'
-	client_ip_address=`cut -d' ' -f3 $leases_file`
-	client_mac_address=`cut -d' ' -f2 $leases_file`
-	echo ~~~ Test dhcp_lease_time...
-	if ! dhcp_lease_time $client_ip_address; then
-		error_exit "'dhcp_lease_time $client_ip_address' failed with return code $?"
-	else
-		#Add \n to dhcp_lease_time's output
-		echo ''
-	fi
-	echo ~~~ Test dhcp_release...
-	cat $leases_file
-	if ! dhcp_release veth0 $client_ip_address 1-$client_mac_address; then
-		error_exit "'dhcp_release veth0 $client_ip_address 1-$client_mac_address' failed with return code $?0"
-	fi
-	if [ -n "`cat $leases_file`" ]; then
-		cat $leases_file
-		error_exit "$leases_file is not empty"
-	fi
-}
-
-check_lua_log () {
-	log_file='/var/log/dnsmasq-lua.log'
-	echo ~~~ Check log file generated by lua script
-	ls -l ${log_file}
-	if [ -s ${log_file} ]; then
-		cat ${log_file}
-		match_or_exit ${log_file} ${FUNCTIONS_DIR}/log.patterns
-	else
-		error_exit "${log_file} is empty"
-	fi
-}

debian/tests/functions.d/add-to.interfaces

@@ -1,18 +0,0 @@
-
-auto dummy0
-iface dummy0 inet static
-    pre-up ip link add dummy0 type dummy
-    address 192.168.141.1
-    netmask 255.255.255.248
-    post-down ip link del dummy0
-
-auto veth0
-iface veth0 inet static
-    pre-up ip netns add clientnet
-    pre-up ip link add veth0 type veth peer veth1 netns clientnet
-    address 192.168.142.1
-    netmask 255.255.255.248
-    post-down ip link del veth0
-    post-down ip netns del clientnet
-
-iface veth1 inet dhcp

debian/tests/functions.d/add-to.named.conf.local

@@ -1,2 +0,0 @@
-zone "autopkg.test"      { type master; file "/etc/bind/db.autopkg.test"; };
-

debian/tests/functions.d/db.autopkg.test

@@ -1,18 +0,0 @@
-$TTL    604800
-@       IN      SOA     ns.autopkg.test. hostmaster.autopkg.test. (
-                              2         ; Serial
-                         604800         ; Refresh
-                          86400         ; Retry
-                        2419200         ; Expire
-                            300 )       ; Negative Cache TTL
-;
-@	IN	NS	ns
-ns	IN	A	192.168.141.1
-host	IN	A	192.168.142.1
-dhcp0	IN	A	192.168.142.2
-dhcp1	IN	A	192.168.142.3
-dhcp2	IN	A	192.168.142.4
-dhcp3	IN	A	192.168.142.5
-dhcp4	IN	A	192.168.142.6
-brdcst	IN	A	192.168.142.7
-

debian/tests/functions.d/dig.patterns

@@ -1,4 +0,0 @@
-ns.autopkg.test. hostmaster.autopkg.test. 2 604800 86400 2419200 300
-ns.autopkg.test.
-192.168.141.1
-192.168.142.5

debian/tests/functions.d/dnsmasq-autopkgtest.conf

@@ -1,6 +0,0 @@
-no-resolv
-server=/autopkg.test/192.168.141.1
-listen-address=192.168.142.1,127.0.0.1
-bind-interfaces
-dhcp-range=192.168.142.2,192.168.142.6
-dhcp-authoritative

debian/tests/functions.d/dnsmasq.alt-autopkgtest.default

@@ -1,42 +0,0 @@
-# This file has six functions:
-# 1) to completely disable starting this dnsmasq instance
-# 2) to set DOMAIN_SUFFIX by running `dnsdomainname`
-# 3) to select an alternative config file
-#    by setting DNSMASQ_OPTS to --conf-file=<file>
-# 4) to tell dnsmasq to read the files in /etc/dnsmasq.d for
-#    more configuration variables.
-# 5) to stop the resolvconf package from controlling dnsmasq's
-#    idea of which upstream nameservers to use.
-# 6) to avoid using this dnsmasq instance as the system's default resolver
-#    by setting DNSMASQ_EXCEPT="lo"
-# For upgraders from very old versions, all the shell variables set
-# here in previous versions are still honored by the init script
-# so if you just keep your old version of this file nothing will break.
-
-#DOMAIN_SUFFIX=`dnsdomainname`
-DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt.conf"
-
-# The dnsmasq daemon is run by default conforming to the Debian Policy.
-# To disable the service,
-# for SYSV init, use "update-rc.d dnsmasq disable",
-# for systemd, use "systemctl disable dnsmasq".
-
-# By default search this drop directory for configuration options.
-# Libvirt leaves a file here to make the system dnsmasq play nice.
-# Comment out this line if you don't want this. The dpkg-* are file
-# endings which cause dnsmasq to skip that file. This avoids pulling
-# in backups made by dpkg.
-CONFIG_DIR=/etc/dnsmasq.alt.d,.dpkg-dist,.dpkg-old,.dpkg-new
-
-# If the resolvconf package is installed, dnsmasq will use its output
-# rather than the contents of /etc/resolv.conf to find upstream
-# nameservers. Uncommenting this line inhibits this behaviour.
-# Note that including a "resolv-file=<filename>" line in
-# /etc/dnsmasq.conf is not enough to override resolvconf if it is
-# installed: the line below must be uncommented.
-#IGNORE_RESOLVCONF=yes
-
-# If the resolvconf package is installed, dnsmasq will tell resolvconf
-# to use dnsmasq under 127.0.0.1 as the system's default resolver.
-# Uncommenting this line inhibits this behaviour.
-#DNSMASQ_EXCEPT="lo"

debian/tests/functions.d/ip-addr.patterns

@@ -1,6 +0,0 @@
-?: veth1@if?: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
-    link/ether ??:??:??:??:??:?? brd ff:ff:ff:ff:ff:ff link-netnsid 0
-    inet 192.168.142.?/29 brd 192.168.142.7 scope global dynamic veth1
-       valid_lft 3[56][0-9][0-9]sec preferred_lft 3[56][0-9][0-9]sec
-    inet6 fe80::*:*:*:*/64 scope link*
-       valid_lft forever preferred_lft forever

debian/tests/functions.d/log.lua

@@ -1,40 +0,0 @@
--- Lua script logging calls from dnsmasq
-
--- Open the log file in append mode 
-logfile = assert(io.open("/var/log/dnsmasq-lua.log", "a"))
-
--- Prepend date and time to a string and write the result to the log file
-function __log(str)
-	logfile:write(os.date("!%FT%TZ ")..str.."\n")
-end
-
--- flush the log file
-function __flush_log()
-	logfile:flush()
-end
-
--- Log a call to init()
-function init()
-	__log("initialising")
-	__flush_log()
-end
-
--- Log a call to shutdown()
-function shutdown()
-	__log("shutting down")
-	__flush_log()
-end
-
--- Log a call to lease() including all arguments
-function lease(operation, params)
-	local lines = {}
-	__log(operation.." lease")
-	for key,value in pairs(params) do
-		table.insert(lines, key..": "..value)
-	end
-	table.sort(lines)
-	for index,line in ipairs(lines) do
-		__log("\t"..line)
-	end
-	__flush_log()
-end

debian/tests/functions.d/log.patterns

@@ -1,10 +0,0 @@
-????-??-??T??:??:??Z initialising
-????-??-??T??:??:??Z add lease
-????-??-??T??:??:??Z 	client_id: ??:??:??:??:??:??:??:??:??:??:??:??:??:??:??:??:??:??:??
-????-??-??T??:??:??Z 	data_missing: 1.0
-????-??-??T??:??:??Z 	hostname: ?*
-????-??-??T??:??:??Z 	interface: veth0
-????-??-??T??:??:??Z 	ip_address: 192.168.142.[2-6]
-????-??-??T??:??:??Z 	lease_expires: [1-9]*
-????-??-??T??:??:??Z 	mac_address: ??:??:??:??:??:??
-????-??-??T??:??:??Z 	time_remaining: 3600.0

debian/tests/functions.d/named.conf.options

@@ -1,6 +0,0 @@
-options {
-        directory "/var/cache/bind";
-        listen-on { 192.168.141.1; };
-        recursion no;
-};
-

debian/tests/functions.d/options+lua.patterns

@@ -1 +0,0 @@
-*: IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 Lua TFTP conntrack ipset nftset auth cryptohash DNSSEC loop-detect inotify dumpfile

debian/tests/functions.d/options.patterns

@@ -1 +0,0 @@
-*: IPv6 GNU-getopt DBus no-UBus i18n IDN2 DHCP DHCPv6 no-Lua TFTP conntrack ipset nftset auth cryptohash DNSSEC loop-detect inotify dumpfile

debian/tests/get-address+query-dns+check-utils

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -e
-
-. debian/tests/functions
-
-stop_dnsmasq_bind_networking
-configure_and_start_networking
-configure_and_start_bind
-configure_and_start_dnsmasq
-
-get_address_on_veth1_and_check_the_result
-
-query_test_zone_records_and_check_the_result
-
-check_utils
-
-#Done
-echo Looks good.

debian/tests/get-address+query-dns+lua+alt

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -e
-
-. debian/tests/functions
-
-stop_dnsmasq_bind_networking
-configure_and_start_networking
-configure_and_start_bind
-configure_and_start_dnsmasq lua alt
-
-get_address_on_veth1_and_check_the_result
-
-query_test_zone_records_and_check_the_result
-
-check_lua_log
-
-#Done
-echo Looks good.

debian/tests/get-address+query-dns+sysv+alt

@@ -1,18 +0,0 @@
-#!/bin/sh
-
-set -e
-
-. debian/tests/functions
-
-stop_dnsmasq_bind_networking
-configure_and_start_networking
-configure_and_start_bind
-configure_and_start_dnsmasq sysv alt
-
-get_address_on_veth1_and_check_the_result
-
-query_test_zone_records_and_check_the_result
-
-#Done
-echo Looks good.
-SYSTEMCTL_SKIP_REDIRECT=1 /etc/init.d/dnsmasq stop alt

debian/upstream/metadata

@@ -1,9 +0,0 @@
-Cite-As: dnsmasq
-Contact: simon@thekelleys.org.uk
-Security-Contact: https://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
-Repository: https://thekelleys.org.uk/git/dnsmasq.git
-Repository-Browse: https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=summary
-Changelog: https://thekelleys.org.uk/dnsmasq/CHANGELOG
-Documentation: https://thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html
-FAQ: https://thekelleys.org.uk/dnsmasq/docs/FAQ
-Bug-Submit: https://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss

debian/upstream/signing-key.asc

@@ -1,63 +0,0 @@
------BEGIN PGP PUBLIC KEY BLOCK-----
-
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debian/watch

@@ -1,5 +0,0 @@
-version=4
-opts=\
-pgpmode=auto \
-https://thekelleys.org.uk/dnsmasq/ \
-dnsmasq-([\d.]+)@ARCHIVE_EXT@

man/dnsmasq.8

@@ -1,4 +1,4 @@
-.TH DNSMASQ 8 2021-08-16
+.TH DNSMASQ 8 2025-02-05
 .SH NAME
 dnsmasq \- A lightweight DHCP and caching DNS server.
 .SH SYNOPSIS
@@ -114,7 +114,8 @@ which defaults to 1000ms. If the second parameter is given this controls
 how long the retries will continue for
 otherwise this defaults to 10000ms. Retries are repeated with exponential
 backoff. Using this option increases memory usage and
-network bandwidth.
+network bandwidth. If not otherwise configured, this option is activated
+with the default parameters when \fB--dnssec\fP is set.
 .TP
 .B \-k, --keep-in-foreground
 Do not go into the background at startup but otherwise run as
@@ -133,7 +134,7 @@ only, to stop dnsmasq daemonising in production, use
 Log the results of DNS queries handled by dnsmasq. Enable a full cache dump on receipt of SIGUSR1. If the argument "extra" is supplied, ie
 .B --log-queries=extra
 then the log has extra information at the start of each line.
-This consists of a serial number which ties together the log lines associated with an individual query, and the IP address of the requestor.
+This consists of a serial number which ties together the log lines associated with an individual query, and the IP address of the requestor. If the argument "proto" is supplied, this shows everything that "extra" does and also the network protocol used to communicate the queries.
 .TP
 .B \-8, --log-facility=<facility>
 Set the facility to which dnsmasq will send syslog entries, this
@@ -386,7 +387,11 @@ Remove A records from answers. No IPv4 addresses will be returned.
 Remove AAAA records from answers. No IPv6 addresses will be returned.
 .TP
 .B --filter-rr=<rrtype>[,<rrtype>...]
-Remove records of the specified type(s) from answers.
+Remove records of the specified type(s) from answers. The otherwise-nonsensical --filter-rr=ANY has
+a special meaning: it filters replies to queries for type ANY. Everything other than A, AAAA, MX and CNAME
+records are removed. Since ANY queries with forged source addresses can be used in DNS amplification attacks
+(replies to ANY queries can be large) this defangs such attacks, whilst still supporting the
+one remaining possible use of ANY queries. See RFC 8482 para 4.3 for details.
 .TP
 .B --cache-rr=<rrtype>[,<rrtype>...]
 By default, dnsmasq caches A, AAAA, CNAME and SRV DNS record types.
@@ -493,10 +498,7 @@ xxx.internal.thekelleys.org.uk at 192.168.1.1 then giving  the flag
 .B --server=/internal.thekelleys.org.uk/192.168.1.1
 will send all queries for
 internal machines to that nameserver, everything else will go to the
-servers in /etc/resolv.conf. DNSSEC validation is turned off for such
-private nameservers, UNLESS a
-.B --trust-anchor
-is specified for the domain in question. An empty domain specification,
+servers in /etc/resolv.conf. An empty domain specification,
 .B // 
 has the special meaning of "unqualified names only" ie names without any
 dots in them. A non-standard port may be specified as 
@@ -764,19 +766,18 @@ results in the name internal-0.thekelleys.org.uk. returning 192.168.0.50, intern
 Second, 
 .B --synth-domain=thekelleys.org.uk,192.168.0.0/24,internal- (no *)
 will result in a query for internal-192-168-0-56.thekelleys.org.uk returning
-192.168.0.56 and a reverse query vice versa. The same applies to IPv6,
-but IPv6 addresses may start with '::'
-but DNS labels may not start with '-' so in this case if no prefix is
-configured a zero is added in front of the label. ::1 becomes 0--1.
-
-V4 mapped IPv6 addresses, which have a representation like ::ffff:1.2.3.4 are handled specially, and become like 0--ffff-1-2-3-4
+192.168.0.56 and a reverse query vice versa. The same applies to IPv6;
+the representation doesn't use the :: compression feature or
+the special representation of V4 mapped IPv6 addresses as these
+can generate illegal domain names, so all domains are of the form
+internal-1000-0000-0000-0000-0000-0000-0000-0008.example.com
 
 The address range can be of the form
 <start address>,<end address> or <ip address>/<prefix-length> in both forms of the option. For IPv6 the start and end addresses
 must fall in the same /64 network, or prefix-length must be greater than or equal to 64 except that shorter prefix lengths than 64 are allowed only if non-sequential names are in use.
 .TP
 .B --dumpfile=<path/to/file>
-Specify the location of a pcap-format file which dnsmasq uses to dump copies of network packets for debugging purposes. If the file exists when dnsmasq starts, it is not deleted; new packets are added to the end.
+Specify the location of a pcap-format file which dnsmasq uses to dump copies of network packets for debugging purposes. If the file exists when dnsmasq starts, it is not deleted; new packets are added to the end. The file may be a named-pipe which Wireshark is listening to.
 .TP
 .B --dumpmask=<mask>
 Specify which types of packets should be added to the dumpfile. The argument should be the OR of the bitmasks for each type of packet to be dumped: it can be specified in hex by preceding the number with 0x in  the normal way. Each time a packet is written to the dumpfile, dnsmasq logs the packet sequence and the mask
@@ -848,6 +849,18 @@ name on successive queries, for load-balancing. This turns off that
 behaviour, so that the records are always returned in the order
 that they are received from upstream.
 .TP
+.B --do-0x20-encode, --no-0x20-encode
+Dnsmasq can scramble the case of letters in DNS queries it sends upstream as a security feature.
+This technique can interact badly with rare broken DNS servers which don't preserve the case
+of the query in their reply. The first time a reply is returned
+which matches the query in all respects except case, a warning
+will be logged. If this coincides with DNS not functioning, it
+is necessary to disable the feature. As at version 2.91, 0x20 encoding
+is disabled by default, and must be enabled with --do-0x20-encode. The default
+may change in the future, so to be sure of its status after an upgrade, set --do-0x20-encode
+or --no-0x20-encode in your config. --no-0x20-encode overrides --do-x20-encode or a future default
+0x20-encode enable.
+.TP
 .B --use-stale-cache[=<max TTL excess in s>]
 When set, if a DNS name exists in the cache, but its time-to-live has expired, dnsmasq will return the data anyway. (It attempts to refresh the
 data with an upstream query after returning the stale data.) This can improve speed and reliability. It comes at the expense
@@ -860,7 +873,7 @@ Set the maximum number of concurrent DNS queries. The default value is
 150, which should be fine for most setups. The only known situation
 where this needs to be increased is when using web-server log file
 resolvers, which can generate large numbers of concurrent queries. This
-parameter actually controls the number of concurrent queries per server group, where a server group is the set of server(s) associated with a single domain. So if a domain has it's own server via --server=/example.com/1.2.3.4 and 1.2.3.4 is not responding, but queries for *.example.com cannot go elsewhere, then other queries will not be affected. On configurations with many such server groups and tight resources, this value may need to be reduced.
+parameter actually controls the number of concurrent queries per server group, where a server group is the set of server(s) associated with a single domain. So if a domain has its own server via --server=/example.com/1.2.3.4 and 1.2.3.4 is not responding, but queries for *.example.com cannot go elsewhere, then other queries will not be affected. On configurations with many such server groups and tight resources, this value may need to be reduced.
 .TP
 .B --dnssec
 Validate DNS replies and cache DNSSEC data. When forwarding DNS queries, dnsmasq requests the 
@@ -878,12 +891,15 @@ ie capable of returning DNSSEC records with data. If they are not,
 then dnsmasq will not be able to determine the trusted status of
 answers and this means that DNS service will be entirely broken.
 .TP
-.B --trust-anchor=[<class>],<domain>,<key-tag>,<algorithm>,<digest-type>,<digest>
+.B --trust-anchor=<domain>,[<class>,][<key-tag>,<algorithm>,<digest-type>,<digest>]
 Provide DS records to act a trust anchors for DNSSEC
-validation. Typically these will be the DS record(s) for Key Signing
+validation. The class defaults to IN. Typically these will be the DS record(s) for Key Signing
 key(s) (KSK) of the root zone,
-but trust anchors for limited domains are also possible. The current
-root-zone trust anchors may be downloaded from https://data.iana.org/root-anchors/root-anchors.xml 
+but trust anchors for limited domains are also possible.
+A negative trust anchor (ie. proof that a DS record doesn't exist) may be configured be specifying
+only the name or only the name and class. This can be useful for forcing dnsmasq to treat zones delegated
+using \fB--server=/<domain>/<ip-address>\fP as unsigned. The current
+root-zone trust anchors may be downloaded from https://data.iana.org/root-anchors/root-anchors.xml
 .TP
 .B --dnssec-check-unsigned[=no]
 As a default, dnsmasq checks that unsigned DNS replies are
@@ -927,6 +943,15 @@ Authenticated Data bit correctly in all cases is not technically possible. If th
 when using this option, then the cache should be disabled using --cache-size=0. In most cases, enabling DNSSEC validation
 within dnsmasq is a better option. See --dnssec for details.
 .TP
+.B --dnssec-limits=<limit>[,<limit>.......]
+Override the default resource limits applied to DNSSEC validation. Cryptographic operations are expensive and crafted domains
+can DoS a DNSSEC validator by forcing it to do hundreds of thousands of such operations. To avoid this, the dnsmasq validation code
+applies limits on how much work will be expended in validation. If any of the limits are exceeded, the validation will fail and the
+domain treated as BOGUS. There are four limits, in order(default values in parens): number a signature validation fails per RRset(20), number of signature validations and
+hash computations per query(200), number of sub-queries to fetch DS and DNSKEY RRsets per query(40), and the number of iterations in a NSEC3 record(150).
+The maximum values reached during validation are stored, and dumped as part of the stats generated by SIGUSR1. Supplying a limit value of 0 leaves the default in place, so
+\fB--dnssec-limits=0,0,20\fP sets the number of sub-queries to 20 whilst leaving the other limits at default values.
+.TP
 .B --dnssec-debug
 Set debugging mode for the DNSSEC validation, set the Checking Disabled bit on upstream queries, 
 and don't convert replies which do not validate to responses with
@@ -1175,7 +1200,7 @@ available, though it normally is for direct-connected clients, or
 clients using DHCP relays which support RFC 6939.
 
 
-For DHCPv4, the  special option id:* means "ignore any client-id 
+For DHCPv4, the special option \fBid:*\fP means "ignore any client-id 
 and use MAC addresses only." This is useful when a client presents a client-id sometimes 
 but not others.
 
@@ -1203,36 +1228,34 @@ the result is undefined. A corollary to this is that the name associated with a
 does not appear in the DNS until the host obtains a DHCP lease.
 
 
-The special keyword "ignore"
-tells dnsmasq to never offer a DHCP lease to a machine. The machine
-can be specified by hardware address, client ID or hostname, for
-instance
-.B --dhcp-host=00:20:e0:3b:13:af,ignore
-This is
-useful when there is another DHCP server on the network which should
+The special keyword \fBignore\fP tells dnsmasq never to offer a DHCP lease
+to a machine. The machine
+can be specified by hardware address, client ID or hostname. For
+example: \fB--dhcp-host=00:20:e0:3b:13:af,ignore\fP. 
+This can be useful when there is another DHCP server on the network which should
 be used by some machines.
 
-The set:<tag> construct sets the tag
+The \fBset:<tag>\fP construct sets the tag
 whenever this \fB--dhcp-host\fP directive is in use. This can be used to
 selectively send DHCP options just for this host. More than one tag
 can be set in a \fB--dhcp-host\fP directive (but not in other places where
-"set:<tag>" is allowed). When a host matches any
+\fBset:<tag>\fP is allowed). When a host matches any
 \fB--dhcp-host\fP directive (or one implied by /etc/ethers) then the special
-tag "known" is set. This allows dnsmasq to be configured to
+tag \fBknown\fP is set. This allows dnsmasq to be configured to
 ignore requests from unknown machines using
-.B --dhcp-ignore=tag:!known
+\fB--dhcp-ignore=tag:!known\fP.
 If the host matches only a \fB--dhcp-host\fP directive which cannot
-be used because it specifies an address on different subnet, the tag "known-othernet" is set.
+be used because it specifies an address on a different subnet, the tag \fBknown-othernet\fP is set.
 
-The tag:<tag> construct filters which dhcp-host directives are used; more than
-one can be provided, in this case the request must match all of them. Tagged
+The \fBtag:<tag>\fP construct filters which dhcp-host directives are used. More than
+one tag can be provided. In this case, the request must match all tags. Tagged
 directives are used in preference to untagged ones. Note that one of <hwaddr>,
-<client_id> or <hostname> still needs to be specified (can be a wildcard).
+<client_id> or <hostname> still must be specified (can be a wildcard).
 
 Ethernet addresses (but not client-ids) may have
 wildcard bytes, so for example 
 .B --dhcp-host=00:20:e0:3b:13:*,ignore 
-will cause dnsmasq to ignore a range of hardware addresses. Note that
+will cause dnsmasq to ignore the given range of hardware addresses. Note that
 the "*" will need to be escaped or quoted on a command line, but not
 in the configuration file.
 
@@ -1246,11 +1269,11 @@ is 6.
 
 As a special case, in DHCPv4, it is possible to include more than one
 hardware address. eg:
-.B --dhcp-host=11:22:33:44:55:66,12:34:56:78:90:12,192.168.0.2
+\fB--dhcp-host=11:22:33:44:55:66,12:34:56:78:90:12,192.168.0.2\fP.
 This allows an IP address to be associated with
 multiple hardware addresses, and gives dnsmasq permission to abandon a
 DHCP lease to one of the hardware addresses when another one asks for
-a lease. Beware that this is a dangerous thing to do, it will only
+a lease. Beware that this is a dangerous thing to do: it will only
 work reliably if only one of the hardware addresses is active at any
 time and there is no way for dnsmasq to enforce this. It is, for instance,
 useful to allocate a stable IP address to a laptop which
@@ -1297,27 +1320,25 @@ options containing the same information. /etc/ethers is re-read when
 dnsmasq receives SIGHUP. IPv6 addresses are NOT read from /etc/ethers.
 .TP
 .B \-O, --dhcp-option=[tag:<tag>,[tag:<tag>,]][encap:<opt>,][vi-encap:<enterprise>,][vendor:[<vendor-class>],][<opt>|option:<opt-name>|option6:<opt>|option6:<opt-name>],[<value>[,<value>]]
-Specify different or extra options to DHCP clients. By default,
+Send various extra options to DHCP clients. By default,
 dnsmasq sends some standard options to DHCP clients, the netmask and
 broadcast address are set to the same as the host running dnsmasq, and
 the DNS server and default route are set to the address of the machine
 running dnsmasq. (Equivalent rules apply for IPv6.) If the domain name option has been set, that is sent.
 This configuration allows these defaults to be overridden,
-or other options specified. The option, to be sent may be given as a
-decimal number or as "option:<option-name>" The option numbers are
+or other options specified. The option to be sent may be given as a
+decimal number or as \fBoption:<option-name>\fP. 
+
+Option numbers are
 specified in RFC2132 and subsequent RFCs. The set of option-names
-known by dnsmasq can be discovered by running "dnsmasq --help dhcp".
-For example, to set the default route option to 
-192.168.4.4, do 
-.B --dhcp-option=3,192.168.4.4 
-or
-.B --dhcp-option = option:router, 192.168.4.4
-and to set the time-server address to 192.168.0.4, do
-.B --dhcp-option = 42,192.168.0.4 
-or 
-.B --dhcp-option = option:ntp-server, 192.168.0.4
-The special address 0.0.0.0 is taken to mean "the address of the
-machine running dnsmasq".
+known by dnsmasq can be discovered by running \fBdnsmasq --help dhcp\fP.
+For example, to set the default route option to 192.168.4.4, use 
+\fB--dhcp-option=3,192.168.4.4\fP or 
+\fB--dhcp-option=option:router,192.168.4.4\fP 
+and to set the time-server address to 192.168.0.4, use
+\fB--dhcp-option=42,192.168.0.4\fP or
+\fB--dhcp-option=option:ntp-server,192.168.0.4\fP.
+The special address 0.0.0.0 means "the address of the system running dnsmasq".
 
 An option without data is valid, and includes just the option without data.
 (There is only one option with a zero length data field currently defined for DHCPv4, 80:rapid commit, so this feature is not very useful in practice). Options for which dnsmasq normally
@@ -1338,30 +1359,29 @@ to option 120 are handled as per RFC 3361. Dotted-quad IP addresses
 which are followed by a slash and then a netmask size are encoded as
 described in RFC 3442.
 
-IPv6 options are specified using the 
-.B option6:
+IPv6 options are specified using the \fBoption6:\fP
 keyword, followed by the option number or option name. The IPv6 option
 name space is disjoint from the IPv4 option name space. IPv6 addresses
 in options must be bracketed with square brackets, eg. 
-.B --dhcp-option=option6:ntp-server,[1234::56]
+\fB --dhcp-option=option6:ntp-server,[1234::56]\fP. 
 For IPv6, [::] means "the global address of
 the machine running dnsmasq", whilst [fd00::] is replaced with the
 ULA, if it exists, and [fe80::] with the link-local address.
 
-Be careful: no checking is done that the correct type of data for the
-option number is sent, it is quite possible to
-persuade dnsmasq to generate illegal DHCP packets with injudicious use
-of this flag. When the value is a decimal number, dnsmasq must determine how 
+Be careful: data-type suitability for the option number sent is not checked.
+It is quite possible to persuade dnsmasq to generate illegal DHCP packets with
+injudicious use of this flag. 
+When the value is a decimal number, dnsmasq must determine how 
 large the data item is. It does this by examining the option number and/or the
 value, but can be overridden by appending a single letter flag as follows:
 b = one byte, s = two bytes, i = four bytes. This is mainly useful with 
 encapsulated vendor class options (see below) where dnsmasq cannot
-determine data size from the  option number. Option data which
+determine data size from the option number. Option data which
 consists solely of periods and digits will be interpreted by dnsmasq
 as an IP address, and inserted into an option as such. To force a
 literal string, use quotes. For instance when using option 66 to send
-a literal IP address as TFTP server name, it is necessary to do
-.B --dhcp-option=66,"1.2.3.4"
+a literal IP address as TFTP server name, it is necessary to do 
+\fB--dhcp-option=66,"1.2.3.4"\fP.
 
 Encapsulated Vendor-class options may also be specified (IPv4 only) using
 \fB--dhcp-option\fP: for instance
@@ -1382,7 +1402,7 @@ Options may be encapsulated (IPv4 only) within other options: for instance
 will send option 175, within which is the option 190. If multiple
 options are given which are encapsulated with the same option number
 then they will be correctly combined into one encapsulated option.
-encap: and vendor: are may not both be set in the same \fB--dhcp-option\fP.
+encap: and vendor: may not both be set in the same \fB--dhcp-option\fP.
 
 The final variant on encapsulated options is "Vendor-Identifying
 Vendor Options" as specified by RFC3925. These are denoted like this: 
@@ -1390,7 +1410,7 @@ Vendor Options" as specified by RFC3925. These are denoted like this:
 The number in the vi-encap: section is the IANA enterprise number
 used to identify this option. This form of encapsulation is supported
 in IPv6.
- 
+
 The address 0.0.0.0 is not treated specially in
 encapsulated options.
 .TP
@@ -1401,6 +1421,10 @@ except that the option will always be sent, even if the client does
 not ask for it in the parameter request list. This is sometimes
 needed, for example when sending options to PXELinux.
 .TP
+.B --dhcp-option-pxe=[tag:<tag>,[tag:<tag>,]][encap:<opt>,][vi-encap:<enterprise>,]<opt>,[<value>[,<value>]]
+A variant of --dhcp-option which defines options only sent in reply to PXE clients. In addition, such options are
+sent in reply to PXE clients when dnsmasq is acting as a PXE proxy, unlike other options. A typical use-case is option 175, sent to iPXE.
+.TP
 .B --dhcp-no-override
 (IPv4 only) Disable re-use of the DHCP servername and filename fields as extra
 option space. If it can, dnsmasq moves the boot server and filename
@@ -1412,7 +1436,7 @@ forces "simple and safe" behaviour to avoid problems in such a case.
 .B --dhcp-relay=<local address>[,<server address>[#<server port>]][,<interface]
 Configure dnsmasq to do DHCP relay. The local address is an address
 allocated to an interface on the host running dnsmasq. All DHCP
-requests arriving on that interface will we relayed to a remote DHCP
+requests arriving on that interface will be relayed to a remote DHCP
 server at the server address. It is possible to relay from a single local
 address to multiple remote servers by using multiple \fB--dhcp-relay\fP
 configs with the same local address and different server
@@ -1512,45 +1536,47 @@ via relays. If a list of IP addresses is given, only interactions via
 relays at those addresses are affected.
 .TP
 .B --dhcp-match=set:<tag>,<option number>|option:<option name>|vi-encap:<enterprise>[,<value>]
-Without a value, set the tag if the client sends a DHCP
-option of the given number or name. When a value is given, set the tag only if
-the option is sent and matches the value. The value may be of the form
+Without \fB<value>\fP, set \fB<tag>\fP if the client sends a DHCP
+\fBoption\fP of the given number or name. With \fB<value>\fP, set \fB<tag>\fP only if
+the client sends the \fBoption\fP matching or containing \fB<value>\fP. 
+
+The value may be of the form
 "01:ff:*:02" in which case the value must match (apart from wildcards)
 but the option sent may have unmatched data past the end of the
 value. The value may also be of the same form as in 
 .B --dhcp-option
 in which case the option sent is treated as an array, and one element
-must match, so
+must match.
 .B --dhcp-match=set:efi-ia32,option:client-arch,6
-will set the tag "efi-ia32" if the the number 6 appears in the list of
+sets the tag \fBefi-ia32\fP if the number \fB6\fP appears in the list of
 architectures sent by the client in option 93. (See RFC 4578 for
-details.)  If the value is a string, substring matching is used.
+details.) If the value is a string, substring matching is used.
 
 The special form with vi-encap:<enterprise number> matches against
 vendor-identifying vendor classes for the specified enterprise. Please
 see RFC 3925 for more details of these rare and interesting beasts.
 .TP
 .B --dhcp-name-match=set:<tag>,<name>[*]
-Set the tag if the given name is supplied by a DHCP client. There may be a single trailing wildcard *, which has the usual meaning. Combined with dhcp-ignore or dhcp-ignore-names this gives the ability to ignore certain clients by name, or disallow certain hostnames from being claimed by a client.
+Set a \fB<tag>\fP if the given \fB<name>\fP is supplied by a DHCP client. There may be a single trailing wildcard *, with a glob meaning. Combined with \fBdhcp-ignore\fP or \fBdhcp-ignore-names\fP this gives the ability to ignore certain clients by name, or disallow certain hostnames from being claimed by a client.
 .TP
 .B --tag-if=set:<tag>[,set:<tag>[,tag:<tag>[,tag:<tag>]]]
-Perform boolean operations on tags. Any tag appearing as set:<tag> is set if
-all the tags which appear as tag:<tag> are set, (or unset when tag:!<tag> is used)
-If no tag:<tag> appears set:<tag> tags are set unconditionally.
-Any number of set: and tag: forms may appear, in any order. 
-\fB--tag-if\fP lines are executed in order, so if the tag in tag:<tag> is a
+Perform boolean operations on tags. All \fBset:<tag>\fP tags are set if
+all \fBtag:<tag>\fP are already set, (or unset when \fBtag:!<tag>\fP is used).
+If no \fBtag:<tag>\fP appears, \fBset:<tag>\fP tags are set unconditionally.
+Any number of \fBset:\fP and \fBtag:\fP forms may appear, in any order. 
+\fB--tag-if\fP lines are executed in order, so if the tag in \fBtag:<tag>\fP is a
 tag set by another
 .B --tag-if,
-the line which sets the tag must precede the one which tests it.
+the line which sets the tag must precede the line which tests it.
 
-As an extension, the tag:<tag> clauses support limited wildcard matching,
-similar to the matching in the \fB--interface\fP directive.  This allows, for
-example, using \fB--tag-if=set:ppp,tag:ppp*\fP to set the tag 'ppp' for all requests
-received on any matching interface (ppp0, ppp1, etc).  This can be used in conjunction
-with the tag:!<tag> format meaning that no tag matching the wildcard may be set.
+As an extension, the \fBtag:<tag>\fP clauses support limited wildcard matching,
+similar to the matching in the \fB--interface\fP directive. This allows the
+example \fB--tag-if=set:ppp,tag:ppp*\fP to set the tag 'ppp' for all requests
+received on any matching interface (ppp0, ppp1, etc). This can be used in conjunction
+with the \fBtag:!<tag>\fP format meaning that no tag matching the wildcard may be set.
 .TP
 .B \-J, --dhcp-ignore=tag:<tag>[,tag:<tag>]
-When all the given tags appear in the tag set ignore the host and do
+When all the given tags appear in the tag set, ignore the host and do
 not allocate it a DHCP lease.
 .TP
 .B --dhcp-ignore-names[=tag:<tag>[,tag:<tag>]]
@@ -1663,6 +1689,11 @@ to allow netbooting. This mode is enabled using the
 .B proxy
 keyword in
 .B --dhcp-range.
+If the "other" DHCP server is on a remote network, it is
+possible, and useful, to configure dnsmasq as both a PXE proxy-DHCP server
+and a DHCP relay to the remote DHCP server. See
+.B --dhcp-relay
+for details. PXE is only supported over IPv4 at this time.
 .TP
 .B --dhcp-pxe-vendor=<vendor>[,...]
 According to UEFI and PXE specifications, DHCP packets between PXE clients and
@@ -2394,48 +2425,67 @@ the CNAME. To work around this, add the CNAME to /etc/hosts so that
 the CNAME is shadowed too.
 
 .PP
-The tag system works as follows: For each DHCP request, dnsmasq
-collects a set of valid tags from active configuration lines which
-include set:<tag>, including one from the 
-.B --dhcp-range
-used to allocate the address, one from any matching 
-.B --dhcp-host
-(and "known" or "known-othernet" if a \fB--dhcp-host\fP matches)
-The tag "bootp" is set for BOOTP requests, and a tag whose name is the 
-name of the interface on which the request arrived is also set.
+The tag system works as follows: dnsmasq tags each DHCP request
+with tags from applicable configuration lines containing \fBset:<tag>\fP i.e. 
 
-Any configuration lines which include one or more tag:<tag> constructs
-will only be valid if all that tags are matched in the set derived
-above. Typically this is \fB--dhcp-option\fP.
-.B --dhcp-option
-which has tags will be used in preference  to an untagged 
-.B --dhcp-option,
-provided that _all_ the tags match somewhere in the
-set collected as described above. The prefix '!' on a tag means 'not'
-so \fB--dhcp-option=tag:!purple,3,1.2.3.4\fP sends the option when the
-tag purple is not in the set of valid tags. (If using this in a
-command line rather than a configuration file, be sure to escape !,
-which is a shell metacharacter)
+\fBset:<tag>\fP from the \fB--dhcp-range\fP used to allocate the address;
+
+\fBset:<tag>\fP from any matching \fB--dhcp-host\fP (plus the tag \fBknown\fP or 
+\fBknown-othernet\fP).
+
+BOOTP requests are tagged \fBbootp\fP. Each request is also tagged with the name of  
+the interface on which the request arrived.
+
+Each configuration line containing one or more \fBtag:<tag>\fP constructs
+applies when all its tags exist on the request. That is:
+
+Configuration tag:A applies to a request set:tagged A.
+
+Configuration tag:B applies to a request set:tagged B.
+
+Configuration tag:A+B doesn't apply to a request set:tagged A.
+
+Configuration tag:A+B doesn't apply to a request set:tagged B.
+
+Configurations tag:A+B, tag:A, tag:B apply to a request set:tagged A+B.
+
+\fBset:<tag>\fP constructs in \fB--dhcp-range\fP and \fB--dhcp-host\fP tag requests.
+
+Use \fBtag:<tag>\fPs in \fB--dhcp-option\fPs to match \fBset:<tag>\fP and apply configurations.
+
+A \fB--dhcp-option\fP with \fBtag:<tag>\fP is preferred over an untagged 
+\fB--dhcp-option\fP, provided that \fBall\fP its tags match somewhere in the
+set gathered above. 
+
+The tag prefix '!' means 'not'.
+\fB--dhcp-option=tag:!purple,3,1.2.3.4\fP sends the option when the request 
+is not tagged with purple. (The shell metacharacter '!' must be escaped on the
+command line but not in a configuration file).
+
+When selecting \fB--dhcp-option\fPs, a \fB--dhcp-range\fP tag is second class 
+to other tags, to make it easy to override options for
+individual hosts, so:
 
-When selecting \fB--dhcp-options\fP, a tag from \fB--dhcp-range\fP is second class
-relative to other tags, to make it easy to override options for
-individual hosts, so 
 .B --dhcp-range=set:interface1,......
+
 .B --dhcp-host=set:myhost,.....
+
 .B --dhcp-option=tag:interface1,option:nis-domain,"domain1"
+
 .B --dhcp-option=tag:myhost,option:nis-domain,"domain2"
-will set the NIS-domain to domain1 for hosts in the range, but
-override that to domain2 for a particular host.
+
+sets the NIS-domain to domain1 for hosts in the range, but
+to domain2 for a particular host that may or may not fall in the range.
 
 .PP
-Note that for 
-.B --dhcp-range
-both tag:<tag> and set:<tag> are allowed, to both select the range in
+Note that for \fB--dhcp-range\fP both 
+\fBtag:<tag>\fP and 
+\fBset:<tag>\fP are possible, in order to both select the range in
 use based on (eg) \fB--dhcp-host\fP, and to affect the options sent, based on
 the range selected.
 
-This system evolved from an earlier, more limited one and for backward
-compatibility "net:" may be used instead of "tag:" and "set:" may be
+The tag system evolved from an earlier, more limited system. For backward
+compatibility, "net:" may be used instead of "tag:" and "set:" may be
 omitted. (Except in 
 .B --dhcp-host,
 where "net:" may be used instead of "set:".) For the same reason, '#'
@@ -2453,7 +2503,7 @@ configuration option is present to activate the DHCP server
 on a particular network. (Setting \fB--bootp-dynamic\fP removes the need for
 static address mappings.) The filename
 parameter in a BOOTP request is used as a tag,
-as is the tag "bootp", allowing some control over the options returned to
+as is the tag \fBbootp\fP, allowing some control over the options returned to
 different classes of hosts.
 
 .SH AUTHORITATIVE CONFIGURATION

po/de.po

@@ -2,7 +2,7 @@
 #
 # This revised version is (C) Copyright by
 # Matthias Andree <matthias.andree@gmx.de>, 2010 - 2021.
-# Conrad Kostecki <conrad@kostecki.com>, 2014 - 2022.
+# Conrad Kostecki <conrad@kostecki.com>, 2014 - 2024.
 # It is subject to the GNU General Public License v2,
 # or at your option, any later version.
 #
@@ -10,10 +10,10 @@
 # Simon Kelley <simon@thekelleys.org.uk>, 2005.
 msgid ""
 msgstr ""
-"Project-Id-Version: dnsmasq 2.88\n"
+"Project-Id-Version: dnsmasq 2.91\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2021-03-20 00:00+0000\n"
-"PO-Revision-Date: 2022-11-17 20:08+0100\n"
+"PO-Revision-Date: 2024-12-23 22:36+0100\n"
 "Last-Translator: Conrad Kostecki <conrad@kostecki.com>\n"
 "Language-Team: German <de@li.org>\n"
 "Language: de\n"
@@ -21,7 +21,7 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
-"X-Generator: Poedit 3.2\n"
+"X-Generator: Poedit 3.5\n"
 
 #: cache.c:652
 msgid "Internal error in cache."
@@ -43,9 +43,9 @@ msgid "bad name at %s line %d"
 msgstr "Fehlerhafter Name in %s Zeile %d"
 
 #: cache.c:1265
-#, fuzzy, c-format
+#, c-format
 msgid "read %s - %d names"
-msgstr "%s gelesen - %d Adressen"
+msgstr "%s gelesen - %d Namen"
 
 #: cache.c:1381
 msgid "cleared cache"
@@ -84,7 +84,7 @@ msgstr "weitergeleitete Anfragen %u, lokal beantwortete Anfragen %u"
 #: cache.c:1766
 #, c-format
 msgid "queries answered from stale cache %u"
-msgstr ""
+msgstr "Anfragen beantwortet vom veralteten Cache %u"
 
 #: cache.c:1768
 #, c-format
@@ -92,9 +92,9 @@ msgid "queries for authoritative zones %u"
 msgstr "Anfragen nach autoritativen Zonen %u"
 
 #: cache.c:1796
-#, fuzzy, c-format
+#, c-format
 msgid "server %s#%d: queries sent %u, retried %u, failed %u, nxdomain replies %u, avg. latency %ums"
-msgstr "Server %s#%d: Anfragen gesendet %u, erneut versucht oder fehlgeschlagen %u"
+msgstr "Server %s#%d: Anfragen gesendet %u, erneut versucht %u, fehlgeschlagen %u, nxdomain-Antworten %u, durchschnittliche Latenz %ums"
 
 #: util.c:51
 #, c-format
@@ -120,14 +120,14 @@ msgid "failed to allocate %d bytes"
 msgstr "Konnte %d Bytes nicht belegen"
 
 #: util.c:344
-#, fuzzy, c-format
+#, c-format
 msgid "failed to reallocate %d bytes"
-msgstr "Konnte %d Bytes nicht belegen"
+msgstr "Konnte %d Bytes nicht allozieren"
 
 #: util.c:465
-#, fuzzy, c-format
+#, c-format
 msgid "cannot read monotonic clock: %s"
-msgstr "kann Netlink-Socket nicht erzeugen: %s"
+msgstr "monotone Uhr kann nicht gelesen werden: %s"
 
 # @Simon: not perfect but I cannot get nearer right now.
 #: util.c:579
@@ -188,11 +188,11 @@ msgstr "Unberechtigte DNS-Anfragen von Windows-Rechnern nicht weiterleiten."
 
 #: option.c:404
 msgid "Don't include IPv4 addresses in DNS answers."
-msgstr ""
+msgstr "Keine IPv4-Adressen in DNS-Antworten inkludieren."
 
 #: option.c:405
 msgid "Don't include IPv6 addresses in DNS answers."
-msgstr ""
+msgstr "Keine IPv6-Adressen in DNS-Antworten inkludieren."
 
 #: option.c:406
 msgid "Enable DHCP in the range given with lease duration."
@@ -313,7 +313,7 @@ msgstr "Fehlerhafte Suchergebnisse NICHT zwischenspeichern."
 
 #: option.c:434
 msgid "Use expired cache data for faster reply."
-msgstr ""
+msgstr "Verwende abgelaufene Cachedaten für schnellere Antwort."
 
 #: option.c:435
 #, c-format
@@ -347,7 +347,7 @@ msgstr "Ausgehenden Port für DNS-Anfragen an vorgelagerte Server erzwingen."
 
 #: option.c:442
 msgid "Set maximum number of random originating ports for a query."
-msgstr ""
+msgstr "Setze die maximale Anzahl zufälliger Ursprungsports für eine Abfrage."
 
 #: option.c:443
 msgid "Do NOT read resolv.conf."
@@ -404,7 +404,7 @@ msgstr "Spezifiziere untere Gültigkeitsdauergrenze für Zwischenspeicher."
 
 #: option.c:456
 msgid "Retry DNS queries after this many milliseconds."
-msgstr ""
+msgstr "DNS-Abfragen nach so vielen Millisekunden wiederholen."
 
 #: option.c:457
 #, c-format
@@ -520,7 +520,7 @@ msgstr "Konfiguration aus allen Dateien in diesem Verzeichnis lesen."
 
 #: option.c:484
 msgid "Execute file and read configuration from stdin."
-msgstr ""
+msgstr "Führe Datei aus und lese die Konfiguration aus stdin."
 
 #: option.c:485
 msgid "Log to this syslog facility or file. (defaults to DAEMON)"
@@ -680,7 +680,7 @@ msgstr "Anfragende MAC-Adresse in die weiterleitende DNS-Anfrage einfügen."
 
 #: option.c:523
 msgid "Strip MAC information from queries."
-msgstr ""
+msgstr "Entferne die MAC-Information von Abfragen."
 
 #: option.c:524
 msgid "Add specified IP subnet to forwarded DNS queries."
@@ -688,7 +688,7 @@ msgstr "Füge spezifiziertes IP-Subnetz an weitergeleiteten DNS-Anfragen hinzu."
 
 #: option.c:525
 msgid "Strip ECS information from queries."
-msgstr ""
+msgstr "Entferne die ECS-Information von Abfragen."
 
 #: option.c:526
 msgid "Add client identification to forwarded DNS queries."
@@ -773,9 +773,8 @@ msgid "Specify ipsets to which matching domains should be added"
 msgstr "Spezifiziere IPSets, zu denen passende Domains hinzugefügt werden sollen"
 
 #: option.c:546
-#, fuzzy
 msgid "Specify nftables sets to which matching domains should be added"
-msgstr "Spezifiziere IPSets, zu denen passende Domains hinzugefügt werden sollen"
+msgstr "Geben Sie nftables sets an, zu denen passende Domänen hinzugefügt werden sollen"
 
 #: option.c:547
 msgid "Enable filtering of DNS queries with connection-track marks."
@@ -880,7 +879,7 @@ msgstr "Protokolliere kein Routine-TFTP."
 
 #: option.c:572
 msgid "Suppress round-robin ordering of DNS records."
-msgstr ""
+msgstr "Unterdrückt die Round-Robin-Sortierung von DNS-Einträgen."
 
 #: option.c:802
 #, c-format
@@ -915,11 +914,11 @@ msgstr "Schnittstellenbindung nicht unterstützt"
 
 #: option.c:955
 msgid "Cannot resolve server name"
-msgstr ""
+msgstr "Servername kann nicht aufgelöst werden"
 
 #: option.c:991
 msgid "cannot use IPv4 server address with IPv6 source address"
-msgstr ""
+msgstr "IPv4-Serveradresse kann nicht mit IPv6-Quelladresse verwendet werden"
 
 #: option.c:997 option.c:1043
 msgid "interface can only be specified once"
@@ -931,21 +930,19 @@ msgstr "Fehlerhafter Schnittestellenname"
 
 #: option.c:1037
 msgid "cannot use IPv6 server address with IPv4 source address"
-msgstr ""
+msgstr "IPv6-Serveradresse kann nicht mit IPv4-Quelladresse verwendet werden"
 
 #: option.c:1124
-#, fuzzy
 msgid "bad IPv4 prefix length"
-msgstr "fehlerhafte Präfixlänge"
+msgstr "ungültige IPv4-Präfixlänge"
 
 #: option.c:1155 option.c:1165 option.c:1240 option.c:1250 option.c:5360
 msgid "error"
 msgstr "Fehler"
 
 #: option.c:1207
-#, fuzzy
 msgid "bad IPv6 prefix length"
-msgstr "fehlerhafte Präfixlänge"
+msgstr "ungültige IPv6-Präfixlänge"
 
 #: option.c:1467
 msgid "inappropriate vendor:"
@@ -1034,7 +1031,6 @@ msgid "recompile with HAVE_LUASCRIPT defined to enable Lua scripts"
 msgstr "Neuübersetzung mit HAVE_LUASCRIPT nötig, um benutzerdefinierte Lua-Skripte auszuführen"
 
 #: option.c:2447
-#, fuzzy
 msgid "invalid auth-zone"
 msgstr "unzulässiger Alias-Bereich"
 
@@ -1059,9 +1055,8 @@ msgid "recompile with HAVE_IPSET defined to enable ipset directives"
 msgstr "Neuübersetzung mit HAVE_IPSET nötig, um IPSet-Direktiven zu aktivieren"
 
 #: option.c:3117
-#, fuzzy
 msgid "recompile with HAVE_NFTSET defined to enable nftset directives"
-msgstr "Neuübersetzung mit HAVE_IPSET nötig, um IPSet-Direktiven zu aktivieren"
+msgstr "Neukompilieren mit definiertem HAVE_NFTSET, um NFTSET-Direktiven zu aktivieren"
 
 #: option.c:3192 option.c:3210
 msgid "recompile with HAVE_CONNTRACK defined to enable connmark-allowlist directives"
@@ -1259,7 +1254,7 @@ msgstr "unzulässige Option"
 #: option.c:5363
 #, c-format
 msgid " in output from %s"
-msgstr ""
+msgstr " in der Ausgabe von %s"
 
 #: option.c:5365
 #, c-format
@@ -1272,9 +1267,9 @@ msgid "read %s"
 msgstr "%s gelesen"
 
 #: option.c:5446
-#, fuzzy, c-format
+#, c-format
 msgid "cannot execute %s: %s"
-msgstr "kann %s nicht erstellen: %s"
+msgstr "kann %s nicht ausführen: %s"
 
 #: option.c:5454 option.c:5615 tftp.c:790
 #, c-format
@@ -1282,14 +1277,14 @@ msgid "cannot read %s: %s"
 msgstr "kann %s nicht lesen: %s"
 
 #: option.c:5473
-#, fuzzy, c-format
+#, c-format
 msgid "error executing %s: %s"
-msgstr "konnte %s nicht ausführen: %s"
+msgstr "Fehler bei der Ausführung von %s: %s"
 
 #: option.c:5476
 #, c-format
 msgid "%s returns non-zero error code"
-msgstr ""
+msgstr "%s gibt einen Fehlercode ungleich Null zurück"
 
 #: option.c:5775
 msgid "junk found in command line"
@@ -1399,14 +1394,14 @@ msgid "reducing DNS packet size for nameserver %s to %d"
 msgstr "Reduziere die DNS-Paketgröße für Nameserver %s auf %d"
 
 #: forward.c:1565
-#, fuzzy, c-format
+#, c-format
 msgid "ignoring query from non-local network %s (logged only once)"
-msgstr "Ignoriere Anfrage von auswärtigem Netzwerk"
+msgstr "Ignoriere Abfrage von nicht-lokalen Netzwerk %s (Nur einmal protokolliert)"
 
 #: forward.c:2139
-#, fuzzy, c-format
+#, c-format
 msgid "ignoring query from non-local network %s"
-msgstr "Ignoriere Anfrage von auswärtigem Netzwerk"
+msgstr "Ignoriere Abfrage von nicht-lokalen Netzwerk %s"
 
 #: forward.c:2501
 #, c-format
@@ -1488,7 +1483,7 @@ msgstr "ignoriere Namensserver %s - kann Socket nicht erzeugen/binden: %s"
 
 #: network.c:1643
 msgid "more servers are defined but not logged"
-msgstr ""
+msgstr "mehr Server sind definiert aber nicht protokolliert"
 
 #: network.c:1654
 msgid "(no DNSSEC)"
@@ -1605,7 +1600,7 @@ msgstr "max_port darf nicht kleiner als min_port sein"
 
 #: dnsmasq.c:271
 msgid "port_limit must not be larger than available port range"
-msgstr ""
+msgstr "port_limit darf nicht größer als der verfügbare Portbereich sein"
 
 #: dnsmasq.c:278
 msgid "--auth-server required when an auth zone is defined."
@@ -1810,9 +1805,9 @@ msgid "restricting maximum simultaneous TFTP transfers to %d"
 msgstr "Begrenze gleichzeitige TFTP-Übertragungen auf maximal %d"
 
 #: dnsmasq.c:1095
-#, fuzzy, c-format
+#, c-format
 msgid "error binding DHCP socket to device %s"
-msgstr "Fehler beim Senden des DHCP-Pakets an %s: %s"
+msgstr "Fehler beim Binden des DHCP-Sockets an Gerät %s"
 
 #: dnsmasq.c:1229
 msgid "connected to system DBus"
@@ -1981,19 +1976,19 @@ msgid "read %s - %d addresses"
 msgstr "%s gelesen - %d Adressen"
 
 #: dhcp.c:1136
-#, fuzzy, c-format
+#, c-format
 msgid "Cannot broadcast DHCP relay via interface %s"
-msgstr "Kann nicht zum DHCPv6 Server multicasten ohne korrekte Schnittstelle"
+msgstr "DHCP-Relay kann nicht über die Schnittstelle %s gesendet werden"
 
 #: dhcp.c:1160
 #, c-format
 msgid "broadcast via %s"
-msgstr ""
+msgstr "broadcast via %s"
 
 #: dhcp.c:1163 rfc3315.c:2219
-#, fuzzy, c-format
+#, c-format
 msgid "DHCP relay at %s -> %s"
-msgstr "DHCP Relais %s -> %s"
+msgstr "DHCP-Relay bei %s -> %s"
 
 #: lease.c:64
 #, c-format
@@ -2405,14 +2400,14 @@ msgid "release received"
 msgstr "Freigabe empfangen"
 
 #: rfc3315.c:2200
-#, fuzzy, c-format
+#, c-format
 msgid "Cannot multicast DHCP relay via interface %s"
-msgstr "Kann nicht zum DHCPv6 Server multicasten ohne korrekte Schnittstelle"
+msgstr "Multicast-DHCP-Relay über Schnittstelle %s nicht möglich"
 
 #: rfc3315.c:2216
 #, c-format
 msgid "multicast via %s"
-msgstr ""
+msgstr "multicast via %s"
 
 #: dhcp-common.c:187
 #, c-format
@@ -2484,9 +2479,9 @@ msgid "router advertisement on %s%s"
 msgstr "Router-Advertisment auf %s%s"
 
 #: dhcp-common.c:1043
-#, fuzzy, c-format
+#, c-format
 msgid "DHCP relay from %s via %s"
-msgstr "DHCP Weiterleitung von %s nach %s"
+msgstr "DHCP-Relay von %s über %s"
 
 #: dhcp-common.c:1045
 #, c-format
@@ -2621,9 +2616,9 @@ msgid "Insecure DS reply received for %s, check domain configuration and upstrea
 msgstr "Unsichere DS-Antwort für %s, bitte Domainkonfiguration und Upstream DNS-Server für DNSSEC-Unterstützung überprüfen"
 
 #: blockdata.c:55
-#, fuzzy, c-format
+#, c-format
 msgid "pool memory in use %zu, max %zu, allocated %zu"
-msgstr "Speicherpool in Benutzung %u, Max %u, zugewiesen %u"
+msgstr "Speicherpool in Benutzung %zu, Max %zu, zugewiesen %zu"
 
 #: tables.c:61
 #, c-format
@@ -2695,24 +2690,23 @@ msgid "bad dynamic directory %s: %s"
 msgstr "fehlerhaftes dynamisches Verzeichnis %s: %s"
 
 #: inotify.c:186
-#, fuzzy
 msgid "not a directory"
-msgstr "Kann auf Verzeichnis %s nicht zugreifen: %s"
+msgstr "ist kein Verzeichnis"
 
 #: inotify.c:299
 #, c-format
 msgid "inotify: %s removed"
-msgstr ""
+msgstr "inotify: %s entfernt"
 
 #: inotify.c:301
-#, fuzzy, c-format
+#, c-format
 msgid "inotify: %s new or modified"
-msgstr "inotify, neue oder geänderte Datei %s"
+msgstr "inotify: %s neu oder modifiziert"
 
 #: inotify.c:309
 #, c-format
 msgid "inotify: flushed %u names read from %s"
-msgstr ""
+msgstr "inotify: %u Namen gelöscht, aus %s gelesen"
 
 #: dump.c:68
 #, c-format
@@ -2729,14 +2723,14 @@ msgid "failed to write packet dump"
 msgstr "schreiben des Paketmitschnitts fehlgeschlagen"
 
 #: dump.c:289
-#, fuzzy, c-format
+#, c-format
 msgid "%u dumping packet %u mask 0x%04x"
-msgstr "Lade UDP Paket %u Maske 0x%04x ab"
+msgstr "%u dumpe Paket %u Maske 0x%04x"
 
 #: dump.c:291
-#, fuzzy, c-format
+#, c-format
 msgid "dumping packet %u mask 0x%04x"
-msgstr "Lade UDP Paket %u Maske 0x%04x ab"
+msgstr "Dumpe Packet %u Make 0x%04x"
 
 #: ubus.c:79
 #, c-format
@@ -2770,9 +2764,8 @@ msgid "Failed to create SHA-256 hash object"
 msgstr "Kann SHA-256-Hash-Objekt nicht erstellen"
 
 #: nftset.c:35
-#, fuzzy
 msgid "failed to create nftset context"
-msgstr "konnte IPset-Kontroll-Socket nicht erzeugen: %s"
+msgstr "Fehler beim Erstellen des NFTSET-Kontexts"
 
 #~ msgid "bad IPv4 prefix"
 #~ msgstr "fehlerhaftes IPv4-Präfix"

src/arp.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -35,7 +35,7 @@ struct arp_record {
 static struct arp_record *arps = NULL, *old = NULL, *freelist = NULL;
 static time_t last = 0;
 
-static int filter_mac(int family, char *addrp, char *mac, size_t maclen, void *parmv)
+static int filter_mac(int family, void *addrp, char *mac, size_t maclen, void *parmv)
 {
   struct arp_record *arp;
 
@@ -152,7 +152,7 @@ int find_mac(union mysockaddr *addr, unsigned char *mac, int lazy, time_t now)
 	 if (arp->status != ARP_EMPTY)
 	   arp->status = ARP_MARK;
        
-       iface_enumerate(AF_UNSPEC, NULL, filter_mac);
+       iface_enumerate(AF_UNSPEC, NULL, (callback_t){.af_unspec=filter_mac});
        
        /* Remove all unconfirmed entries to old list. */
        for (arp = arps, up = &arps; arp; arp = tmp)

src/auth.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -96,8 +96,8 @@ int in_zone(struct auth_zone *zone, char *name, char **cut)
 }
 
 
-size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now, union mysockaddr *peer_addr, 
-		   int local_query, int do_bit, int have_pseudoheader) 
+size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t now,
+		   union mysockaddr *peer_addr, int local_query) 
 {
   char *name = daemon->namebuff;
   unsigned char *p, *ansp;
@@ -137,7 +137,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
       nameoffset = p - (unsigned char *)header;
 
       /* now extract name as .-concatenated string into name */
-      if (!extract_name(header, qlen, &p, name, 1, 4))
+      if (!extract_name(header, qlen, &p, name, EXTR_NAME_EXTRACT, 4))
 	return 0; /* bad packet */
  
       GETSHORT(qtype, p); 
@@ -513,7 +513,7 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
 		 nxdomain = 0;
 		 if ((crecp->flags & flag) && (local_query || filter_zone(zone, flag, &(crecp->addr))))
 		   {
-		     log_query(crecp->flags, name, &crecp->addr, record_source(crecp->uid), 0);
+		     log_query(crecp->flags & ~F_REVERSE, name, &crecp->addr, record_source(crecp->uid), 0);
 		     if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, 
 					     daemon->auth_ttl, NULL, qtype, C_IN, 
 					     qtype == T_A ? "4" : "6", &crecp->addr))
@@ -868,7 +868,13 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
   
   /* truncation */
   if (trunc)
-    header->hb3 |= HB3_TC;
+    {
+      header->hb3 |= HB3_TC;
+      if (!(ansp = skip_questions(header, qlen)))
+	return 0; /* bad packet */
+      anscount = authcount = 0;
+      log_query(F_AUTH, "reply", NULL, "truncated", 0);
+    }
   
   if ((auth || local_query) && nxdomain)
     SET_RCODE(header, NXDOMAIN);
@@ -890,10 +896,6 @@ size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, time_t n
       return resize_packet(header,  ansp - (unsigned char *)header, NULL, 0);
     }
   
-  /* Advertise our packet size limit in our reply */
-  if (have_pseudoheader)
-    return add_pseudoheader(header,  ansp - (unsigned char *)header, (unsigned char *)limit, daemon->edns_pktsz, 0, NULL, 0, do_bit, 0);
-
   return ansp - (unsigned char *)header;
 }
   

src/blockdata.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -101,7 +101,7 @@ static struct blockdata *blockdata_alloc_real(int fd, char *data, size_t len)
 	      memcpy(block->key, data, blen);
 	      data += blen;
 	    }
-	  else if (!read_write(fd, block->key, blen, 1))
+	  else if (!read_write(fd, block->key, blen, RW_READ))
 	    {
 	      /* failed read free partial chain */
 	      blockdata_free(ret);
@@ -193,7 +193,7 @@ void *blockdata_retrieve(struct blockdata *block, size_t len, void *data)
 {
   size_t blen;
   struct  blockdata *b;
-  void *new, *d;
+  uint8_t *new, *d;
   
   static unsigned int buff_len = 0;
   static unsigned char *buff = NULL;
@@ -228,7 +228,7 @@ void blockdata_write(struct blockdata *block, size_t len, int fd)
   for (; len > 0 && block; block = block->next)
     {
       size_t blen = len > KEYBLOCK_LEN ? KEYBLOCK_LEN : len;
-      read_write(fd, block->key, blen, 0);
+      read_write(fd, block->key, blen, RW_WRITE);
       len -= blen;
     }
 }

src/bpf.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -47,7 +47,7 @@ static union all_addr del_addr;
 
 #if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
 
-int arp_enumerate(void *parm, int (*callback)())
+int arp_enumerate(void *parm, callback_t callback)
 {
   int mib[6];
   size_t needed;
@@ -91,7 +91,7 @@ int arp_enumerate(void *parm, int (*callback)())
       rtm = (struct rt_msghdr *)next;
       sin2 = (struct sockaddr_inarp *)(rtm + 1);
       sdl = (struct sockaddr_dl *)((char *)sin2 + SA_SIZE(sin2));
-      if (!(*callback)(AF_INET, &sin2->sin_addr, LLADDR(sdl), sdl->sdl_alen, parm))
+      if (!callback.af_unspec(AF_INET, &sin2->sin_addr, LLADDR(sdl), sdl->sdl_alen, parm))
 	return 0;
     }
 
@@ -100,7 +100,7 @@ int arp_enumerate(void *parm, int (*callback)())
 #endif /* defined(HAVE_BSD_NETWORK) && !defined(__APPLE__) */
 
 
-int iface_enumerate(int family, void *parm, int (*callback)())
+int iface_enumerate(int family, void *parm, callback_t callback)
 {
   struct ifaddrs *head, *addrs;
   int errsave, fd = -1, ret = 0;
@@ -126,112 +126,110 @@ int iface_enumerate(int family, void *parm, int (*callback)())
   
   for (addrs = head; addrs; addrs = addrs->ifa_next)
     {
-      if (addrs->ifa_addr->sa_family == family)
+      int iface_index = if_nametoindex(addrs->ifa_name);
+      
+      if (iface_index == 0 || !addrs->ifa_addr || 
+	  addrs->ifa_addr->sa_family != family ||
+	  (!addrs->ifa_netmask && family != AF_LINK))
+	continue;
+      
+      if (family == AF_INET)
 	{
-	  int iface_index = if_nametoindex(addrs->ifa_name);
-
-	  if (iface_index == 0 || !addrs->ifa_addr || 
-	      (!addrs->ifa_netmask && family != AF_LINK))
+	  struct in_addr addr, netmask, broadcast;
+	  addr = ((struct sockaddr_in *) addrs->ifa_addr)->sin_addr;
+#ifdef HAVE_BSD_NETWORK
+	  if (del_family == AF_INET && del_addr.addr4.s_addr == addr.s_addr)
 	    continue;
-
-	  if (family == AF_INET)
-	    {
-	      struct in_addr addr, netmask, broadcast;
-	      addr = ((struct sockaddr_in *) addrs->ifa_addr)->sin_addr;
-#ifdef HAVE_BSD_NETWORK
-	      if (del_family == AF_INET && del_addr.addr4.s_addr == addr.s_addr)
-		continue;
 #endif
-	      netmask = ((struct sockaddr_in *) addrs->ifa_netmask)->sin_addr;
-	      if (addrs->ifa_broadaddr)
-		broadcast = ((struct sockaddr_in *) addrs->ifa_broadaddr)->sin_addr; 
-	      else 
-		broadcast.s_addr = 0;	      
-	      if (!((*callback)(addr, iface_index, NULL, netmask, broadcast, parm)))
-		goto err;
-	    }
-	  else if (family == AF_INET6)
-	    {
-	      struct in6_addr *addr = &((struct sockaddr_in6 *) addrs->ifa_addr)->sin6_addr;
-	      unsigned char *netmask = (unsigned char *) &((struct sockaddr_in6 *) addrs->ifa_netmask)->sin6_addr;
-	      int scope_id = ((struct sockaddr_in6 *) addrs->ifa_addr)->sin6_scope_id;
-	      int i, j, prefix = 0;
-	      u32 valid = 0xffffffff, preferred = 0xffffffff;
-	      int flags = 0;
+	  netmask = ((struct sockaddr_in *) addrs->ifa_netmask)->sin_addr;
+	  if (addrs->ifa_broadaddr)
+	    broadcast = ((struct sockaddr_in *) addrs->ifa_broadaddr)->sin_addr; 
+	  else 
+	    broadcast.s_addr = 0;	      
+	  if (!callback.af_inet(addr, iface_index, NULL, netmask, broadcast, parm))
+	    goto err;
+	}
+      else if (family == AF_INET6)
+	{
+	  struct in6_addr *addr = &((struct sockaddr_in6 *) addrs->ifa_addr)->sin6_addr;
+	  unsigned char *netmask = (unsigned char *) &((struct sockaddr_in6 *) addrs->ifa_netmask)->sin6_addr;
+	  int scope_id = ((struct sockaddr_in6 *) addrs->ifa_addr)->sin6_scope_id;
+	  int i, j, prefix = 0;
+	  u32 valid = 0xffffffff, preferred = 0xffffffff;
+	  int flags = 0;
 #ifdef HAVE_BSD_NETWORK
-	      if (del_family == AF_INET6 && IN6_ARE_ADDR_EQUAL(&del_addr.addr6, addr))
-		continue;
+	  if (del_family == AF_INET6 && IN6_ARE_ADDR_EQUAL(&del_addr.addr6, addr))
+	    continue;
 #endif
 #if defined(HAVE_BSD_NETWORK) && !defined(__APPLE__)
-	      struct in6_ifreq ifr6;
-
-	      memset(&ifr6, 0, sizeof(ifr6));
-	      safe_strncpy(ifr6.ifr_name, addrs->ifa_name, sizeof(ifr6.ifr_name));
+	  struct in6_ifreq ifr6;
+	  
+	  memset(&ifr6, 0, sizeof(ifr6));
+	  safe_strncpy(ifr6.ifr_name, addrs->ifa_name, sizeof(ifr6.ifr_name));
+	  
+	  ifr6.ifr_addr = *((struct sockaddr_in6 *) addrs->ifa_addr);
+	  if (fd != -1 && ioctl(fd, SIOCGIFAFLAG_IN6, &ifr6) != -1)
+	    {
+	      if (ifr6.ifr_ifru.ifru_flags6 & IN6_IFF_TENTATIVE)
+		flags |= IFACE_TENTATIVE;
+	      
+	      if (ifr6.ifr_ifru.ifru_flags6 & IN6_IFF_DEPRECATED)
+		flags |= IFACE_DEPRECATED;
 	      
-	      ifr6.ifr_addr = *((struct sockaddr_in6 *) addrs->ifa_addr);
-	      if (fd != -1 && ioctl(fd, SIOCGIFAFLAG_IN6, &ifr6) != -1)
-		{
-		  if (ifr6.ifr_ifru.ifru_flags6 & IN6_IFF_TENTATIVE)
-		    flags |= IFACE_TENTATIVE;
-		  
-		  if (ifr6.ifr_ifru.ifru_flags6 & IN6_IFF_DEPRECATED)
-		    flags |= IFACE_DEPRECATED;
-
 #ifdef IN6_IFF_TEMPORARY
-		  if (!(ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)))
-		    flags |= IFACE_PERMANENT;
+	      if (!(ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_AUTOCONF | IN6_IFF_TEMPORARY)))
+		flags |= IFACE_PERMANENT;
 #endif
-
+	      
 #ifdef IN6_IFF_PRIVACY
-		  if (!(ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_AUTOCONF | IN6_IFF_PRIVACY)))
-		    flags |= IFACE_PERMANENT;
+	      if (!(ifr6.ifr_ifru.ifru_flags6 & (IN6_IFF_AUTOCONF | IN6_IFF_PRIVACY)))
+		flags |= IFACE_PERMANENT;
 #endif
-		}
-	      
-	      ifr6.ifr_addr = *((struct sockaddr_in6 *) addrs->ifa_addr);
-	      if (fd != -1 && ioctl(fd, SIOCGIFALIFETIME_IN6, &ifr6) != -1)
-		{
-		  valid = ifr6.ifr_ifru.ifru_lifetime.ia6t_vltime;
-		  preferred = ifr6.ifr_ifru.ifru_lifetime.ia6t_pltime;
-		}
+	    }
+	  
+	  ifr6.ifr_addr = *((struct sockaddr_in6 *) addrs->ifa_addr);
+	  if (fd != -1 && ioctl(fd, SIOCGIFALIFETIME_IN6, &ifr6) != -1)
+	    {
+	      valid = ifr6.ifr_ifru.ifru_lifetime.ia6t_vltime;
+	      preferred = ifr6.ifr_ifru.ifru_lifetime.ia6t_pltime;
+	    }
 #endif
-	      	      
-	      for (i = 0; i < IN6ADDRSZ; i++, prefix += 8) 
-                if (netmask[i] != 0xff)
-		  break;
-	      
-	      if (i != IN6ADDRSZ && netmask[i]) 
-                for (j = 7; j > 0; j--, prefix++) 
-		  if ((netmask[i] & (1 << j)) == 0)
-		    break;
-	      
-	      /* voodoo to clear interface field in address */
-	      if (!option_bool(OPT_NOWILD) && IN6_IS_ADDR_LINKLOCAL(addr))
-		{
-		  addr->s6_addr[2] = 0;
-		  addr->s6_addr[3] = 0;
-		} 
-	     
-	      if (!((*callback)(addr, prefix, scope_id, iface_index, flags,
-				(int) preferred, (int)valid, parm)))
-		goto err;	      
-	    }
-
-#ifdef HAVE_DHCP6      
-	  else if (family == AF_LINK)
-	    { 
-	      /* Assume ethernet again here */
-	      struct sockaddr_dl *sdl = (struct sockaddr_dl *) addrs->ifa_addr;
-	      if (sdl->sdl_alen != 0 && 
-		  !((*callback)(iface_index, ARPHRD_ETHER, LLADDR(sdl), sdl->sdl_alen, parm)))
-		goto err;
-	    }
-#endif 
+	  
+	  for (i = 0; i < IN6ADDRSZ; i++, prefix += 8) 
+	    if (netmask[i] != 0xff)
+	      break;
+	  
+	  if (i != IN6ADDRSZ && netmask[i]) 
+	    for (j = 7; j > 0; j--, prefix++) 
+	      if ((netmask[i] & (1 << j)) == 0)
+		break;
+	  
+	  /* voodoo to clear interface field in address */
+	  if (!option_bool(OPT_NOWILD) && IN6_IS_ADDR_LINKLOCAL(addr))
+	    {
+	      addr->s6_addr[2] = 0;
+	      addr->s6_addr[3] = 0;
+	    } 
+	  
+	  if (!callback.af_inet6(addr, prefix, scope_id, iface_index, flags,
+				 (unsigned int) preferred, (unsigned int)valid, parm))
+	    goto err;	      
 	}
+      
+#ifdef HAVE_DHCP6      
+      else if (family == AF_LINK)
+	{ 
+	  /* Assume ethernet again here */
+	  struct sockaddr_dl *sdl = (struct sockaddr_dl *) addrs->ifa_addr;
+	  if (sdl->sdl_alen != 0 && 
+	      !callback.af_local(iface_index, ARPHRD_ETHER, LLADDR(sdl), sdl->sdl_alen, parm))
+	    goto err;
+	}
+#endif 
     }
   
   ret = 1;
-
+  
  err:
   errsave = errno;
   freeifaddrs(head); 

src/cache.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -101,6 +101,7 @@ static const struct {
   { 63,  "ZONEMD" }, /* Message Digest Over Zone Data [RFC8976] ZONEMD/zonemd-completed-template 2018-12-12*/
   { 64,  "SVCB" }, /* Service Binding [draft-ietf-dnsop-svcb-https-00] SVCB/svcb-completed-template 2020-06-30*/
   { 65,  "HTTPS" }, /* HTTPS Binding [draft-ietf-dnsop-svcb-https-00] HTTPS/https-completed-template 2020-06-30*/
+  { 66,  "DSYNC" }, /* Endpoint discovery for delegation synchronization [draft-ietf-dnsop-generalized-notify-03] DSYNC/dsync-completed-template 2024-12-10 */
   { 99,  "SPF" }, /* [RFC7208] */
   { 100, "UINFO" }, /* [IANA-Reserved] */
   { 101, "UID" }, /* [IANA-Reserved] */
@@ -112,6 +113,7 @@ static const struct {
   { 107, "LP" }, /* [RFC6742] ILNP/lp-completed-template */
   { 108, "EUI48" }, /* an EUI-48 address [RFC7043] EUI48/eui48-completed-template 2013-03-27*/
   { 109, "EUI64" }, /* an EUI-64 address [RFC7043] EUI64/eui64-completed-template 2013-03-27*/
+  { 128, "NXNAME" }, /* NXDOMAIN indicator for Compact Denial of Existence https://www.iana.org/go/draft-ietf-dnsop-compact-denial-of-existence-04 */
   { 249, "TKEY" }, /* Transaction Key [RFC2930] */
   { 250, "TSIG" }, /* Transaction Signature [RFC8945] */
   { 251, "IXFR" }, /* incremental transfer [RFC1995] */
@@ -125,6 +127,9 @@ static const struct {
   { 259, "DOA" }, /* Digital Object Architecture [draft-durand-doa-over-dns] DOA/doa-completed-template 2017-08-30*/
   { 260, "AMTRELAY" }, /* Automatic Multicast Tunneling Relay [RFC8777] AMTRELAY/amtrelay-completed-template 2019-02-06*/
   { 261, "RESINFO" }, /* Resolver Information as Key/Value Pairs https://datatracker.ietf.org/doc/draft-ietf-add-resolver-info/06/ */
+  { 262, "WALLET" }, /* Public wallet address https://www.iana.org/assignments/dns-parameters/WALLET/wallet-completed-template */
+  { 263, "CLA" }, /*  BP Convergence Layer Adapter https://www.iana.org/go/draft-johnson-dns-ipn-cla-07 */
+  { 264, "IPN" }, /* BP Node Number https://www.iana.org/go/draft-johnson-dns-ipn-cla-07 */
   { 32768,  "TA" }, /* DNSSEC Trust Authorities [Sam_Weiler][http://cameo.library.cmu.edu/][ Deploying DNSSEC Without a Signed Root. Technical Report 1999-19, Information Networking Institute, Carnegie Mellon University, April 2004.] 2005-12-13*/
   { 32769,  "DLV" }, /* DNSSEC Lookaside Validation (OBSOLETE) [RFC8749][RFC4431] */
 };
@@ -474,7 +479,7 @@ static struct crec *cache_scan_free(char *name, union all_addr *addr, unsigned s
 	  if ((crecp->flags & F_FORWARD) && hostname_isequal(cache_get_name(crecp), name))
 	    {
 	      int rrmatch = 0;
-	      if (crecp->flags & flags & F_RR)
+	      if (addr && (crecp->flags & flags & F_RR))
 		{
 		  unsigned short rrc = (crecp->flags & F_KEYTAG) ? crecp->addr.rrblock.rrtype : crecp->addr.rrdata.rrtype;
 		  unsigned short rra = (flags & F_KEYTAG) ? addr->rrblock.rrtype : addr->rrdata.rrtype;
@@ -798,36 +803,32 @@ void cache_end_insert(void)
 	      u16 class = new_chain->uid;
 #endif
 	      
-	      read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), 0);
-	      read_write(daemon->pipe_to_parent, (unsigned char *)name, m, 0);
-	      read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->ttd, sizeof(new_chain->ttd), 0);
-	      read_write(daemon->pipe_to_parent, (unsigned  char *)&flags, sizeof(flags), 0);
-
-	      if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS | F_RR))
+	      read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), RW_WRITE);
+	      read_write(daemon->pipe_to_parent, (unsigned char *)name, m, RW_WRITE);
+	      read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->ttd, sizeof(new_chain->ttd), RW_WRITE);
+	      read_write(daemon->pipe_to_parent, (unsigned  char *)&flags, sizeof(flags), RW_WRITE);
+	      read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr, sizeof(new_chain->addr), RW_WRITE);
+	      
+	      if (flags & F_RR)
 		{
-		  read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr, sizeof(new_chain->addr), 0);
-
-		  if (flags & F_RR)
-		    {
-		      /* A negative RR entry is possible and has no data, obviously. */
-		      if (!(flags & F_NEG) && (flags & F_KEYTAG))
-			blockdata_write(new_chain->addr.rrblock.rrdata, new_chain->addr.rrblock.datalen, daemon->pipe_to_parent);
-		    }
-#ifdef HAVE_DNSSEC
-		  if (flags & F_DNSKEY)
-		    {
-		      read_write(daemon->pipe_to_parent, (unsigned char *)&class, sizeof(class), 0);
-		      blockdata_write(new_chain->addr.key.keydata, new_chain->addr.key.keylen, daemon->pipe_to_parent);
-		    }
-		  else if (flags & F_DS)
-		    {
-		      read_write(daemon->pipe_to_parent, (unsigned char *)&class, sizeof(class), 0);
-		      /* A negative DS entry is possible and has no data, obviously. */
-		      if (!(flags & F_NEG))
-			blockdata_write(new_chain->addr.ds.keydata, new_chain->addr.ds.keylen, daemon->pipe_to_parent);
-		    }
-#endif
+		  /* A negative RR entry is possible and has no data, obviously. */
+		  if (!(flags & F_NEG) && (flags & F_KEYTAG))
+		    blockdata_write(new_chain->addr.rrblock.rrdata, new_chain->addr.rrblock.datalen, daemon->pipe_to_parent);
 		}
+#ifdef HAVE_DNSSEC
+	      if (flags & F_DNSKEY)
+		{
+		  read_write(daemon->pipe_to_parent, (unsigned char *)&class, sizeof(class), RW_WRITE);
+		  blockdata_write(new_chain->addr.key.keydata, new_chain->addr.key.keylen, daemon->pipe_to_parent);
+		}
+	      else if (flags & F_DS)
+		{
+		  read_write(daemon->pipe_to_parent, (unsigned char *)&class, sizeof(class), RW_WRITE);
+		  /* A negative DS entry is possible and has no data, obviously. */
+		  if (!(flags & F_NEG))
+		    blockdata_write(new_chain->addr.ds.keydata, new_chain->addr.ds.keylen, daemon->pipe_to_parent);
+		}
+#endif
 	    }
 	}
       
@@ -838,7 +839,21 @@ void cache_end_insert(void)
   if (daemon->pipe_to_parent != -1)
     {
       ssize_t m = -1;
-      read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), 0);
+
+      read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), RW_WRITE);
+
+#ifdef HAVE_DNSSEC
+      /* Sneak out possibly updated crypto HWM values. */
+      read_write(daemon->pipe_to_parent,
+		 (unsigned char *)&daemon->metrics[METRIC_CRYPTO_HWM],
+		 sizeof(daemon->metrics[METRIC_CRYPTO_HWM]), RW_WRITE);
+      read_write(daemon->pipe_to_parent,
+		 (unsigned char *)&daemon->metrics[METRIC_SIG_FAIL_HWM],
+		 sizeof(daemon->metrics[METRIC_SIG_FAIL_HWM]), RW_WRITE);
+      read_write(daemon->pipe_to_parent,
+		 (unsigned char *)&daemon->metrics[METRIC_WORK_HWM],
+		 sizeof(daemon->metrics[METRIC_WORK_HWM]), RW_WRITE);
+#endif
     }
       
   new_chain = NULL;
@@ -857,21 +872,88 @@ int cache_recv_insert(time_t now, int fd)
   
   cache_start_insert();
   
-  while(1)
+  while (1)
     {
  
-      if (!read_write(fd, (unsigned char *)&m, sizeof(m), 1))
+      if (!read_write(fd, (unsigned char *)&m, sizeof(m), RW_READ))
 	return 0;
       
       if (m == -1)
 	{
+#ifdef HAVE_DNSSEC
+	  /* Sneak in possibly updated crypto HWM. */
+	  unsigned int val;
+	  
+	  if (!read_write(fd, (unsigned char *)&val, sizeof(val), RW_READ))
+	    return 0;
+	  if (val > daemon->metrics[METRIC_CRYPTO_HWM])
+	    daemon->metrics[METRIC_CRYPTO_HWM] = val;
+	  if (!read_write(fd, (unsigned char *)&val, sizeof(val), RW_READ))
+	    return 0;
+	  if (val > daemon->metrics[METRIC_SIG_FAIL_HWM])
+	    daemon->metrics[METRIC_SIG_FAIL_HWM] = val;
+	  if (!read_write(fd, (unsigned char *)&val, sizeof(val), RW_READ))
+	    return 0;
+	  if (val > daemon->metrics[METRIC_WORK_HWM])
+	    daemon->metrics[METRIC_WORK_HWM] = val;
+#endif
 	  cache_end_insert();
 	  return 1;
 	}
 
-      if (!read_write(fd, (unsigned char *)daemon->namebuff, m, 1) ||
-	  !read_write(fd, (unsigned char *)&ttd, sizeof(ttd), 1) ||
-	  !read_write(fd, (unsigned char *)&flags, sizeof(flags), 1))
+#ifdef HAVE_DNSSEC
+      /* UDP validation moved to TCP to avoid truncation. 
+	 Restart UDP validation process with the returned result. */
+      if (m == -2)
+	{
+	  int status, uid, keycount, validatecount;
+	  int *keycountp, *validatecountp;
+	  size_t ret_len;
+	  
+	  struct frec *forward;
+	  
+	  if (!read_write(fd, (unsigned char *)&status, sizeof(status), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&ret_len, sizeof(ret_len), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)daemon->packet, ret_len, RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&forward, sizeof(forward), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&uid, sizeof(uid), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&keycount, sizeof(keycount), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&keycountp, sizeof(keycountp), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&validatecount, sizeof(validatecount), RW_READ))
+	    return 0;
+	  if (!read_write(fd, (unsigned char *)&validatecountp, sizeof(validatecountp), RW_READ))
+	    return 0;
+	  
+	  /* There's a tiny chance that the frec may have been freed 
+	     and reused before the TCP process returns. Detect that with
+	     the uid field which is unique modulo 2^32 for each use. */
+	  if (uid == forward->uid)
+	    {
+	      /* repatriate the work counters from the child process. */
+	      *keycountp = keycount;
+	      *validatecountp = validatecount;
+	      
+	      if (!forward->dependent)
+		return_reply(now, forward, (struct dns_header *)daemon->packet, ret_len, status);
+	      else
+		pop_and_retry_query(forward, status, now);
+	    }
+	  
+	  return 1;
+	}
+#endif
+       
+      if (!read_write(fd, (unsigned char *)daemon->namebuff, m, RW_READ) ||
+	  !read_write(fd, (unsigned char *)&ttd, sizeof(ttd), RW_READ) ||
+	  !read_write(fd, (unsigned char *)&flags, sizeof(flags), RW_READ) ||
+	  !read_write(fd, (unsigned char *)&addr, sizeof(addr), RW_READ))
 	return 0;
 
       daemon->namebuff[m] = 0;
@@ -902,30 +984,23 @@ int cache_recv_insert(time_t now, int fd)
 	{
 	  unsigned short class = C_IN;
 
-	  if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS | F_RR))
-	    {
-	      if (!read_write(fd, (unsigned char *)&addr, sizeof(addr), 1))
-		return 0;
-	      
-	      if ((flags & F_RR) && !(flags & F_NEG) && (flags & F_KEYTAG)
-		  && !(addr.rrblock.rrdata = blockdata_read(fd, addr.rrblock.datalen)))
-		return 0;
+	  if ((flags & F_RR) && !(flags & F_NEG) && (flags & F_KEYTAG)
+	      && !(addr.rrblock.rrdata = blockdata_read(fd, addr.rrblock.datalen)))
+	    return 0;
 #ifdef HAVE_DNSSEC
-	      if (flags & F_DNSKEY)
-		{
-		  if (!read_write(fd, (unsigned char *)&class, sizeof(class), 1) ||
-		      !(addr.key.keydata = blockdata_read(fd, addr.key.keylen)))
-		    return 0;
-		}
-	      else  if (flags & F_DS)
-		{
-		  if (!read_write(fd, (unsigned char *)&class, sizeof(class), 1) ||
-		      (!(flags & F_NEG) && !(addr.key.keydata = blockdata_read(fd, addr.key.keylen))))
-		    return 0;
-		}
-#endif
+	  if (flags & F_DNSKEY)
+	    {
+	      if (!read_write(fd, (unsigned char *)&class, sizeof(class), RW_READ) ||
+		  !(addr.key.keydata = blockdata_read(fd, addr.key.keylen)))
+		return 0;
 	    }
-	  
+	  else  if (flags & F_DS)
+	    {
+	      if (!read_write(fd, (unsigned char *)&class, sizeof(class), RW_READ) ||
+		  (!(flags & F_NEG) && !(addr.key.keydata = blockdata_read(fd, addr.key.keylen))))
+		return 0;
+	    }
+#endif
 	  crecp = really_insert(daemon->namebuff, &addr, class, now, ttl, flags);
 	}
     }
@@ -1378,11 +1453,17 @@ void cache_reload(void)
 	cache->flags = F_FORWARD | F_IMMORTAL | F_DS | F_CONFIG | F_NAMEP;
 	cache->ttd = daemon->local_ttl;
 	cache->name.namep = ds->name;
-	cache->addr.ds.keylen = ds->digestlen;
-	cache->addr.ds.algo = ds->algo;
-	cache->addr.ds.keytag = ds->keytag;
-	cache->addr.ds.digest = ds->digest_type;
 	cache->uid = ds->class;
+	if (ds->digestlen != 0)
+	  {
+	    cache->addr.ds.keylen = ds->digestlen;
+	    cache->addr.ds.algo = ds->algo;
+	    cache->addr.ds.keytag = ds->keytag;
+	    cache->addr.ds.digest = ds->digest_type;
+	  }
+	else
+	  cache->flags |= F_NEG | F_DNSSECOK | F_NO_RR;
+	
 	cache_hash(cache);
 	make_non_terminals(cache);
       }
@@ -1782,15 +1863,31 @@ int cache_make_stat(struct txt_record *t)
 #endif
 
 /* There can be names in the cache containing control chars, don't 
-   mess up logging or open security holes. */
+   mess up logging or open security holes. Also convert to all-LC
+   so that 0x20-encoding doesn't make logs look like ransom notes
+   made out of letters cut from a newspaper.
+   Overwrites daemon->workspacename */
 static char *sanitise(char *name)
 {
-  unsigned char *r;
+  unsigned char *r = (unsigned char *)name;
+  
   if (name)
-    for (r = (unsigned char *)name; *r; r++)
-      if (!isprint((int)*r))
-	return "<name unprintable>";
-
+    {
+      char *d = name = daemon->workspacename;
+      
+      for (; *r; r++, d++)
+	if (!isprint((int)*r))
+	  return "<name unprintable>";
+	else
+	  {
+	    unsigned char c = *r;
+	    
+	    *d = (char)((c >= 'A' && c <= 'Z') ? c + 'a' - 'A' : c);
+	  }
+      
+      *d = 0;
+    }
+  
   return name;
 }
 
@@ -1809,8 +1906,18 @@ static void dump_cache_entry(struct crec *cache, time_t now)
   p = buff;
   
   *a = 0;
-  if (strlen(n) == 0 && !(cache->flags & F_REVERSE))
-    n = "<Root>";
+
+  if (cache->flags & F_REVERSE)
+    {
+      if ((cache->flags & F_NEG))
+	n = "";
+    }
+  else
+    {
+      if (strlen(n) == 0)
+	n = "<Root>";
+    }
+  
   p += sprintf(p, "%-30.30s ", sanitise(n));
   if ((cache->flags & F_CNAME) && !is_outdated_cname_pointer(cache))
     a = sanitise(cache_get_cname_target(cache));
@@ -1893,6 +2000,11 @@ void dump_cache(time_t now)
 #ifdef HAVE_AUTH
   my_syslog(LOG_INFO, _("queries for authoritative zones %u"), daemon->metrics[METRIC_DNS_AUTH_ANSWERED]);
 #endif
+#ifdef HAVE_DNSSEC
+  my_syslog(LOG_INFO, _("DNSSEC per-query subqueries HWM %u"), daemon->metrics[METRIC_WORK_HWM]);
+  my_syslog(LOG_INFO, _("DNSSEC per-query crypto work HWM %u"), daemon->metrics[METRIC_CRYPTO_HWM]);
+  my_syslog(LOG_INFO, _("DNSSEC per-RRSet signature fails HWM %u"), daemon->metrics[METRIC_SIG_FAIL_HWM]);
+#endif
 
   blockdata_report();
   my_syslog(LOG_INFO, _("child processes for TCP requests: in use %zu, highest since last SIGUSR1 %zu, max allowed %zu."),
@@ -2052,6 +2164,11 @@ static char *edestr(int ede)
     case EDE_NO_AUTH:                     return "no reachable authority";
     case EDE_NETERR:                      return "network error";
     case EDE_INVALID_DATA:                return "invalid data";
+    case EDE_SIG_E_B_V:                   return "signature expired before valid";
+    case EDE_TOO_EARLY:                   return "too early";
+    case EDE_UNS_NS3_ITER:                return "unsupported NSEC3 iterations value";
+    case EDE_UNABLE_POLICY:               return "uanble to conform to policy";
+    case EDE_SYNTHESIZED:                 return "synthesized";
     default:                              return "unknown";
     }
 }
@@ -2171,12 +2288,12 @@ void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg,
     }
   else if (flags & F_AUTH)
     source = "auth";
-   else if (flags & F_DNSSEC)
+  else if (flags & F_DNSSEC)
     {
       source = arg;
       verb = "to";
     }
-   else if (flags & F_SERVER)
+  else if (flags & F_SERVER)
     {
       source = "forwarded";
       verb = "to";
@@ -2205,12 +2322,21 @@ void log_query(unsigned int flags, char *name, union all_addr *addr, char *arg,
   
   if (option_bool(OPT_EXTRALOG))
     {
-      if (flags & F_NOEXTRA)
-	my_syslog(LOG_INFO, "%u %s %s%s%s %s%s", daemon->log_display_id, source, name, gap, verb, dest, extra);
+      int display_id = daemon->log_display_id;
+      char *proto = "";
+
+      if (option_bool(OPT_LOG_PROTO))
+	proto = (display_id < 0) ? "TCP " : "UDP ";
+      
+      if (display_id < 0)
+	display_id = -display_id;
+      
+      if (flags & F_NOEXTRA || !daemon->log_source_addr)
+	my_syslog(LOG_INFO, "%s%u %s %s%s%s %s%s", proto, display_id, source, name, gap, verb, dest, extra);
       else
 	{
 	   int port = prettyprint_addr(daemon->log_source_addr, daemon->addrbuff2);
-	   my_syslog(LOG_INFO, "%u %s/%u %s %s%s%s %s%s", daemon->log_display_id, daemon->addrbuff2, port, source, name, gap, verb, dest, extra);
+	   my_syslog(LOG_INFO, "%s%u %s/%u %s %s%s%s %s%s", proto, display_id, daemon->addrbuff2, port, source, name, gap, verb, dest, extra);
 	}
     }
   else

src/config.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -18,11 +18,15 @@
 #define MAX_PROCS 20 /* default max no children for TCP requests */
 #define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */
 #define TCP_MAX_QUERIES 100 /* Maximum number of queries per incoming TCP connection */
+#define TCP_TIMEOUT 5 /* timeout waiting to connect to an upstream server - double this for answer */
 #define TCP_BACKLOG 32  /* kernel backlog limit for TCP connections */
 #define EDNS_PKTSZ 1232 /* default max EDNS.0 UDP packet from from  /dnsflagday.net/2020 */
-#define SAFE_PKTSZ 1232 /* "go anywhere" UDP packet size, see https://dnsflagday.net/2020/ */
 #define KEYBLOCK_LEN 40 /* choose to minimise fragmentation when storing DNSSEC keys */
-#define DNSSEC_WORK 50 /* Max number of queries to validate one question */
+#define DNSSEC_LIMIT_WORK 40 /* Max number of queries to validate one question */
+#define DNSSEC_LIMIT_SIG_FAIL 20 /* Number of signature that can fail to validate in one answer */
+#define DNSSEC_LIMIT_CRYPTO 200 /* max no. of crypto operations to validate one query. */
+#define DNSSEC_LIMIT_NSEC3_ITERS 150 /* Max. number if iterations allowed in NSEC3 record. */
+#define DNSSEC_ASSUMED_DS_TTL 3600 /* TTL for negative DS records implied by server=/domain/ */
 #define TIMEOUT 10     /* drop UDP queries after TIMEOUT seconds */
 #define SMALL_PORT_RANGE 30 /* If DNS port range is smaller than this, use different allocation. */
 #define FORWARD_TEST 50 /* try all servers every 50 queries */
@@ -126,9 +130,6 @@ HAVE_AUTH
    define this to include the facility to act as an authoritative DNS
    server for one or more zones.
 
-HAVE_CRYPTOHASH
-   include just hash function from crypto library, but no DNSSEC.
-
 HAVE_DNSSEC
    include DNSSEC validator.
 
@@ -197,7 +198,6 @@ RESOLVFILE
 /* #define HAVE_IDN */
 /* #define HAVE_LIBIDN2 */
 /* #define HAVE_CONNTRACK */
-/* #define HAVE_CRYPTOHASH */
 /* #define HAVE_DNSSEC */
 /* #define HAVE_NFTSET */
 
@@ -363,6 +363,11 @@ HAVE_SOCKADDR_SA_LEN
 #define HAVE_INOTIFY
 #endif
 
+/* This never compiles code, it's only used by the makefile to fingerprint builds. */
+#ifdef DNSMASQ_COMPILE_FLAGS
+static char *compile_flags = DNSMASQ_COMPILE_FLAGS;
+#endif
+
 /* Define a string indicating which options are in use.
    DNSMASQ_COMPILE_OPTS is only defined in dnsmasq.c */
 
@@ -435,10 +440,6 @@ static char *compile_opts =
 "no-"
 #endif
 "auth "
-#if !defined(HAVE_CRYPTOHASH) && !defined(HAVE_DNSSEC)
-"no-"
-#endif
-"cryptohash "
 #ifndef HAVE_DNSSEC
 "no-"
 #endif

src/conntrack.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/crypto.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -16,7 +16,7 @@
 
 #include "dnsmasq.h"
 
-#if defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH)
+#if defined(HAVE_DNSSEC)
 
 /* Minimal version of nettle */
 
@@ -30,9 +30,6 @@
 #define MIN_VERSION(major, minor) ((NETTLE_VERSION_MAJOR == (major) && NETTLE_VERSION_MINOR >= (minor)) || \
 				   (NETTLE_VERSION_MAJOR > (major)))
 
-#endif /* defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH) */
-
-#if defined(HAVE_DNSSEC)
 #include <nettle/rsa.h>
 #include <nettle/ecdsa.h>
 #include <nettle/ecc-curve.h>
@@ -476,9 +473,6 @@ char *nsec3_digest_name(int digest)
     }
 }
 
-#endif /* defined(HAVE_DNSSEC) */
-
-#if defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH)
 /* Find pointer to correct hash function in nettle library */
 const struct nettle_hash *hash_find(char *name)
 {
@@ -509,4 +503,4 @@ const struct nettle_hash *hash_find(char *name)
 #endif
 }
 
-#endif /* defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH) */
+#endif /* defined(HAVE_DNSSEC) */

src/dbus.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -485,28 +485,37 @@ static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
   return error;
 }
 
-static DBusMessage *dbus_set_bool(DBusMessage *message, int flag, char *name)
+static DBusMessage *dbus_get_bool(DBusMessage *message, dbus_bool_t *enabled, char *name)
 {
   DBusMessageIter iter;
-  dbus_bool_t enabled;
 
   if (!dbus_message_iter_init(message, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
     return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS, "Expected boolean argument");
   
-  dbus_message_iter_get_basic(&iter, &enabled);
-
-  if (enabled)
-    { 
-      my_syslog(LOG_INFO, _("Enabling --%s option from D-Bus"), name);
-      set_option_bool(flag);
-    }
+  dbus_message_iter_get_basic(&iter, enabled);
+  
+  if (*enabled)
+    my_syslog(LOG_INFO, _("Enabling --%s option from D-Bus"), name);
   else
+    my_syslog(LOG_INFO, _("Disabling --%s option from D-Bus"), name);
+  
+  return NULL;
+}
+
+static DBusMessage *dbus_set_bool(DBusMessage *message, int flag, char *name)
+{
+  dbus_bool_t val;
+  DBusMessage *reply = dbus_get_bool(message, &val, name);
+  
+  if (!reply)
     {
-      my_syslog(LOG_INFO, _("Disabling --%s option from D-Bus"), name);
-      reset_option_bool(flag);
+      if (val)
+	set_option_bool(flag);
+      else
+	reset_option_bool(flag);
     }
 
-  return NULL;
+  return reply;
 }
 
 #ifdef HAVE_DHCP
@@ -829,23 +838,37 @@ DBusHandlerResult message_handler(DBusConnection *connection,
   else if (strcmp(method, "SetFilterA") == 0)
     {
       static int done = 0;
-      static struct rrlist list = { T_A, NULL };
+      static struct rrlist list = { 0, NULL };
+      dbus_bool_t enabled;
 
-      if (!done)
+      if (!(reply = dbus_get_bool(message, &enabled, "filter-A")))
 	{
-	  list.next = daemon->filter_rr;
-	  daemon->filter_rr = &list;
+	  if (!done)
+	    {
+	      done = 1;
+	      list.next = daemon->filter_rr;
+	      daemon->filter_rr = &list;
+	    }
+
+	  list.rr = enabled ? T_A : 0;
 	}
     }
   else if (strcmp(method, "SetFilterAAAA") == 0)
     {
       static int done = 0;
-      static struct rrlist list = { T_AAAA, NULL };
-
-      if (!done)
+      static struct rrlist list = { 0, NULL };
+      dbus_bool_t enabled;
+      
+      if (!(reply = dbus_get_bool(message, &enabled, "filter-AAAA")))
 	{
-	  list.next = daemon->filter_rr;
-	  daemon->filter_rr = &list;
+	  if (!done)
+	    {
+	      done = 1;
+	      list.next = daemon->filter_rr;
+	      daemon->filter_rr = &list;
+	    }
+	  
+	  list.rr = enabled ? T_AAAA : 0;
 	}
     }
   else if (strcmp(method, "SetLocaliseQueriesOption") == 0)

src/dhcp-common.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -128,22 +128,41 @@ struct dhcp_netid *run_tag_if(struct dhcp_netid *tags)
   return tags;
 }
 
+/* pxemode == 0 -> don't include dhcp-option-pxe options.
+   pxemode == 1 -> do include dhcp-option-pxe options.
+   pxemode == 2 -> include ONLY dhcp-option-pxe options. */
+int pxe_ok(struct dhcp_opt *opt, int pxemode)
+{
+  if (opt->flags & DHOPT_PXE_OPT)
+    {
+      if (pxemode != 0)
+	return 1;
+    }
+  else
+    {
+      if (pxemode != 2)
+	return 1;
+    }
+  
+  return 0;
+}
 
-struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags, struct dhcp_opt *opts)
+struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags, struct dhcp_opt *opts, int pxemode)
 {
   struct dhcp_netid *tagif = run_tag_if(tags);
   struct dhcp_opt *opt;
   struct dhcp_opt *tmp;  
-
+  
   /* flag options which are valid with the current tag set (sans context tags) */
   for (opt = opts; opt; opt = opt->next)
     {
       opt->flags &= ~DHOPT_TAGOK;
       if (!(opt->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925)) &&
-	  match_netid(opt->netid, tagif, 0))
+	  match_netid(opt->netid, tagif, 0) &&
+	  pxe_ok(opt, pxemode))
 	opt->flags |= DHOPT_TAGOK;
     }
-
+  
   /* now flag options which are valid, including the context tags,
      otherwise valid options are inhibited if we found a higher priority one above */
   if (context_tags)
@@ -163,7 +182,8 @@ struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *con
 
       for (opt = opts; opt; opt = opt->next)
 	if (!(opt->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925 | DHOPT_TAGOK)) &&
-	    match_netid(opt->netid, tagif, 0))
+	    match_netid(opt->netid, tagif, 0) &&
+	    pxe_ok(opt, pxemode))
 	  {
 	    struct dhcp_opt *tmp;  
 	    for (tmp = opts; tmp; tmp = tmp->next) 
@@ -176,7 +196,9 @@ struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *con
   
   /* now flag untagged options which are not overridden by tagged ones */
   for (opt = opts; opt; opt = opt->next)
-    if (!(opt->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925 | DHOPT_TAGOK)) && !opt->netid)
+    if (!(opt->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925 | DHOPT_TAGOK)) &&
+	!opt->netid &&
+	pxe_ok(opt, pxemode))
       {
 	for (tmp = opts; tmp; tmp = tmp->next) 
 	  if (tmp->opt == opt->opt && (tmp->flags & DHOPT_TAGOK))
@@ -186,7 +208,7 @@ struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *con
 	else if (!tmp->netid)
 	  my_syslog(MS_DHCP | LOG_WARNING, _("Ignoring duplicate dhcp-option %d"), tmp->opt); 
       }
-
+  
   /* Finally, eliminate duplicate options later in the chain, and therefore earlier in the config file. */
   for (opt = opts; opt; opt = opt->next)
     if (opt->flags & DHOPT_TAGOK)

src/dhcp-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/dhcp.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@ static int complete_context(struct in_addr local, int if_index, char *label,
 			    struct in_addr netmask, struct in_addr broadcast, void *vparam);
 static int check_listen_addrs(struct in_addr local, int if_index, char *label,
 			      struct in_addr netmask, struct in_addr broadcast, void *vparam);
-static int relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz);
+static void relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz);
 static struct dhcp_relay *relay_reply4(struct dhcp_packet *mess, char *arrival_interface);
 
 static int make_fd(int port)
@@ -317,7 +317,7 @@ void dhcp_packet(time_t now, int pxe_fd)
 	  match.ind = iface_index;
 	  
 	  if (!daemon->if_addrs ||
-	      !iface_enumerate(AF_INET, &match, check_listen_addrs) ||
+	      !iface_enumerate(AF_INET, &match, (callback_t){.af_inet=check_listen_addrs}) ||
 	      !match.matched)
 	    return;
 	  
@@ -327,17 +327,10 @@ void dhcp_packet(time_t now, int pxe_fd)
 	  complete_context(match.addr, iface_index, NULL, match.netmask, match.broadcast, &parm);
 	}    
             
-      if (relay_upstream4(iface_index, mess, (size_t)sz))
-	return;
-      
-      if (!iface_enumerate(AF_INET, &parm, complete_context))
+      if (!iface_enumerate(AF_INET, &parm, (callback_t){.af_inet=complete_context}))
 	return;
 
-      /* Check for a relay again after iface_enumerate/complete_context has had
-	 chance to fill in relay->iface_index fields. This handles first time through
-	 and any changes in interface config. */
-       if (relay_upstream4(iface_index, mess, (size_t)sz))
-	return;
+      relay_upstream4(iface_index, mess, (size_t)sz);
        
       /* May have configured relay, but not DHCP server */
       if (!daemon->dhcp)
@@ -398,6 +391,10 @@ void dhcp_packet(time_t now, int pxe_fd)
       struct in_pktinfo *pkt;
       msg.msg_control = control_u.control;
       msg.msg_controllen = sizeof(control_u);
+
+      /* alignment padding passed to the kernel should not be uninitialised. */
+      memset(&control_u, 0, sizeof(control_u));
+
       cmptr = CMSG_FIRSTHDR(&msg);
       pkt = (struct in_pktinfo *)CMSG_DATA(cmptr);
       pkt->ipi_ifindex = rcvd_iface_index;
@@ -1073,14 +1070,14 @@ char *host_from_dns(struct in_addr addr)
   return NULL;
 }
 
-static int relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz)
+static void relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz)
 {
   struct in_addr giaddr = mess->giaddr;
   u8 hops = mess->hops;
   struct dhcp_relay *relay;
 
   if (mess->op != BOOTREQUEST)
-    return 0;
+    return;
 
   for (relay = daemon->relay4; relay; relay = relay->next)
     if (relay->iface_index != 0 && relay->iface_index == iface_index)
@@ -1088,7 +1085,7 @@ static int relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz)
 
   /* No relay config. */
   if (!relay)
-    return 0;
+    return;
   
   for (; relay; relay = relay->next)
     if (relay->iface_index != 0 && relay->iface_index == iface_index)
@@ -1121,6 +1118,9 @@ static int relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz)
 	to.sa.sa_family = AF_INET;
 	to.in.sin_addr = relay->server.addr4;
 	to.in.sin_port = htons(relay->port);
+#ifdef HAVE_SOCKADDR_SA_LEN
+	to.in.sin_len = sizeof(struct sockaddr_in);
+#endif
 	
 	/* Broadcasting to server. */
 	if (relay->server.addr4.s_addr == 0)
@@ -1164,7 +1164,8 @@ static int relay_upstream4(int iface_index, struct dhcp_packet *mess, size_t sz)
 	   }
       }
   
-  return 1;
+  /* restore in case of a local reply. */
+  mess->giaddr = giaddr;
 }
 
 

src/dhcp6-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/dhcp6.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -239,7 +239,7 @@ void dhcp6_packet(time_t now)
 	  relay_upstream6(if_index, (size_t)sz, &from.sin6_addr, from.sin6_scope_id, now))
 	return;
       
-      if (!iface_enumerate(AF_INET6, &parm, complete_context6))
+      if (!iface_enumerate(AF_INET6, &parm, (callback_t){.af_inet6=complete_context6}))
 	return;
       
       /* Check for a relay again after iface_enumerate/complete_context has had
@@ -617,7 +617,7 @@ void make_duid(time_t now)
 	newnow = now - 946684800;
 #endif      
       
-      iface_enumerate(AF_LOCAL, &newnow, make_duid1);
+      iface_enumerate(AF_LOCAL, &newnow, (callback_t){.af_local=make_duid1});
       
       if(!daemon->duid)
 	die("Cannot create DHCPv6 server DUID: %s", NULL, EC_MISC);
@@ -667,7 +667,7 @@ struct cparam {
 
 static int construct_worker(struct in6_addr *local, int prefix, 
 			    int scope, int if_index, int flags, 
-			    int preferred, int valid, void *vparam)
+			    unsigned int preferred, unsigned int valid, void *vparam)
 {
   char ifrn_name[IFNAMSIZ];
   struct in6_addr start6, end6;
@@ -801,7 +801,7 @@ void dhcp_construct_contexts(time_t now)
     if (context->flags & CONTEXT_CONSTRUCTED)
       context->flags |= CONTEXT_GC;
    
-  iface_enumerate(AF_INET6, &param, construct_worker);
+  iface_enumerate(AF_INET6, &param, (callback_t){.af_inet6=construct_worker});
 
   for (up = &daemon->dhcp6, context = daemon->dhcp6; context; context = tmp)
     {
@@ -812,7 +812,7 @@ void dhcp_construct_contexts(time_t now)
 	{
 	  if ((context->flags & CONTEXT_RA) || option_bool(OPT_RA))
 	    {
-	      /* previously constructed context has gone. advertise it's demise */
+	      /* previously constructed context has gone; advertise its demise */
 	      context->flags |= CONTEXT_OLD;
 	      context->address_lost_time = now;
 	      /* Apply same ceiling of configured lease time as in radv.c */

src/dns-protocol.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -112,8 +112,11 @@
 #define EDE_NO_AUTH        22  /* No Reachable Authority */
 #define EDE_NETERR         23  /* Network error */
 #define EDE_INVALID_DATA   24  /* Invalid Data */
-
-
+#define EDE_SIG_E_B_V      25  /* Signature Expired before Valid */
+#define EDE_TOO_EARLY      26  /* To Early */
+#define EDE_UNS_NS3_ITER   27  /* Unsupported NSEC3 Iterations Value */
+#define EDE_UNABLE_POLICY  28  /* Unable to conform to policy */
+#define EDE_SYNTHESIZED    29  /* Synthesized */
 
 
 struct dns_header {
@@ -139,15 +142,15 @@ struct dns_header {
 #define RCODE(x)           ((x)->hb4 & HB4_RCODE)
 #define SET_RCODE(x, code) (x)->hb4 = ((x)->hb4 & ~HB4_RCODE) | code
   
-#define GETSHORT(s, cp) { \
+#define GETSHORT(s, cp) do { \
 	unsigned char *t_cp = (unsigned char *)(cp); \
 	(s) = ((u16)t_cp[0] << 8) \
 	    | ((u16)t_cp[1]) \
 	    ; \
 	(cp) += 2; \
-}
+  } while(0)
 
-#define GETLONG(l, cp) { \
+#define GETLONG(l, cp) do { \
 	unsigned char *t_cp = (unsigned char *)(cp); \
 	(l) = ((u32)t_cp[0] << 24) \
 	    | ((u32)t_cp[1] << 16) \
@@ -155,17 +158,17 @@ struct dns_header {
 	    | ((u32)t_cp[3]) \
 	    ; \
 	(cp) += 4; \
-}
+  } while (0)
 
-#define PUTSHORT(s, cp) { \
+#define PUTSHORT(s, cp) do { \
 	u16 t_s = (u16)(s); \
 	unsigned char *t_cp = (unsigned char *)(cp); \
 	*t_cp++ = t_s >> 8; \
 	*t_cp   = t_s; \
 	(cp) += 2; \
-}
+  } while(0)
 
-#define PUTLONG(l, cp) { \
+#define PUTLONG(l, cp) do { \
 	u32 t_l = (u32)(l); \
 	unsigned char *t_cp = (unsigned char *)(cp); \
 	*t_cp++ = t_l >> 24; \
@@ -173,7 +176,7 @@ struct dns_header {
 	*t_cp++ = t_l >> 8; \
 	*t_cp   = t_l; \
 	(cp) += 4; \
-}
+  } while (0)
 
 #define CHECK_LEN(header, pp, plen, len) \
     ((size_t)((pp) - (unsigned char *)(header) + (len)) <= (plen))

src/dnsmasq.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,6 +32,7 @@ static volatile int pipewrite;
 static void set_dns_listeners(void);
 static void set_tftp_listeners(void);
 static void check_dns_listeners(time_t now);
+static void do_tcp_connection(struct listener *listener, time_t now, int slot);
 static void sig_handler(int sig);
 static void async_event(int pipe, time_t now);
 static void fatal_event(struct event_desc *ev, char *msg);
@@ -61,6 +62,7 @@ int main (int argc, char **argv)
   int need_cap_net_admin = 0;
   int need_cap_net_raw = 0;
   int need_cap_net_bind_service = 0;
+  int have_cap_chown = 0;
   char *bound_device = NULL;
   int did_bind = 0;
   struct server *serv;
@@ -131,19 +133,12 @@ int main (int argc, char **argv)
 	 '.' or NAME_ESCAPE then all would have to be escaped, so the 
 	 presentation format would be twice as long as the spec. */
       daemon->keyname = safe_malloc((MAXDNAME * 2) + 1);
-      daemon->workspacename = safe_malloc((MAXDNAME * 2) + 1);
+      daemon->cname = safe_malloc((MAXDNAME * 2) + 1);
       /* one char flag per possible RR in answer section (may get extended). */
       daemon->rr_status_sz = 64;
       daemon->rr_status = safe_malloc(sizeof(*daemon->rr_status) * daemon->rr_status_sz);
     }
 #endif
-
-#if defined(HAVE_CONNTRACK) && defined(HAVE_UBUS)
-  /* CONNTRACK UBUS code uses this buffer, so if not allocated above,
-     we need to allocate it here. */
-  if (option_bool(OPT_CMARK_ALST_EN) && !daemon->workspacename)
-    daemon->workspacename = safe_malloc((MAXDNAME * 2) + 1);
-#endif
   
 #ifdef HAVE_DHCP
   if (!daemon->lease_file)
@@ -321,9 +316,12 @@ int main (int argc, char **argv)
     {
       dhcp_init();
 #   ifdef HAVE_LINUX_NETWORK
+      /* Need NET_RAW to send ping. */
       if (!option_bool(OPT_NO_PING))
 	need_cap_net_raw = 1;
-      need_cap_net_admin = 1;
+      /* Need NET_ADMIN to change ARP cache if not always broadcasting. */
+      if (daemon->force_broadcast == NULL || daemon->force_broadcast->list != NULL)
+        need_cap_net_admin = 1;
 #   endif
     }
   
@@ -415,7 +413,6 @@ int main (int argc, char **argv)
     {
       cache_init();
       blockdata_init();
-      hash_questions_init();
 
       /* Scale random socket pool by ftabsize, but
 	 limit it based on available fds. */
@@ -429,8 +426,8 @@ int main (int argc, char **argv)
     }
 
 #ifdef HAVE_INOTIFY
-  if ((daemon->port != 0 || daemon->dhcp || daemon->doing_dhcp6)
-      && (!option_bool(OPT_NO_RESOLV) || daemon->dynamic_dirs))
+  if ((daemon->port != 0 && !option_bool(OPT_NO_RESOLV)) ||
+      daemon->dynamic_dirs)
     inotify_dnsmasq_init();
   else
     daemon->inotifyfd = -1;
@@ -562,6 +559,8 @@ int main (int argc, char **argv)
   data = safe_malloc(sizeof(*data) * capsize);
   capget(hdr, data); /* Get current values, for verification */
 
+  have_cap_chown = data->permitted & (1 << CAP_CHOWN);
+
   if (need_cap_net_admin && !(data->permitted & (1 << CAP_NET_ADMIN)))
     fail = "NET_ADMIN";
   else if (need_cap_net_raw && !(data->permitted & (1 << CAP_NET_RAW)))
@@ -689,7 +688,7 @@ int main (int argc, char **argv)
 	      if (getuid() == 0 && ent_pw && ent_pw->pw_uid != 0 && fchown(fd, ent_pw->pw_uid, ent_pw->pw_gid) == -1)
 		chown_warn = errno;
 
-	      if (!read_write(fd, (unsigned char *)daemon->namebuff, strlen(daemon->namebuff), 0))
+	      if (!read_write(fd, (unsigned char *)daemon->namebuff, strlen(daemon->namebuff), RW_WRITE))
 		err = 1;
 	      else
 		{
@@ -875,7 +874,14 @@ int main (int argc, char **argv)
   my_syslog(LOG_INFO, _("compile time options: %s"), compile_opts);
 
   if (chown_warn != 0)
-    my_syslog(LOG_WARNING, "chown of PID file %s failed: %s", daemon->runfile, strerror(chown_warn));
+    {
+#if defined(HAVE_LINUX_NETWORK)
+      if (chown_warn == EPERM && !have_cap_chown)
+        my_syslog(LOG_INFO, "chown of PID file %s failed: please add capability CAP_CHOWN", daemon->runfile);
+      else
+#endif
+      my_syslog(LOG_WARNING, "chown of PID file %s failed: %s", daemon->runfile, strerror(chown_warn));
+    }
   
 #ifdef HAVE_DBUS
   if (option_bool(OPT_DBUS))
@@ -925,7 +931,8 @@ int main (int argc, char **argv)
 	my_syslog(LOG_INFO, _("DNSSEC signature timestamps not checked until system time valid"));
 
       for (ds = daemon->ds; ds; ds = ds->next)
-	my_syslog(LOG_INFO, _("configured with trust anchor for %s keytag %u"),
+	my_syslog(LOG_INFO,
+		  ds->digestlen == 0 ? _("configured with negative trust anchor for %s") : _("configured with trust anchor for %s keytag %u"),
 		  ds->name[0] == 0 ? "<root>" : ds->name, ds->keytag);
     }
 #endif
@@ -957,7 +964,14 @@ int main (int argc, char **argv)
 	my_syslog(LOG_WARNING, _("warning: ignoring resolv-file flag because no-resolv is set"));
       daemon->resolv_files = NULL;
       if (!daemon->servers)
-	my_syslog(LOG_WARNING, _("warning: no upstream servers configured"));
+	{
+#ifdef HAVE_DBUS
+	  if (option_bool(OPT_DBUS))
+	    my_syslog(LOG_INFO, _("no upstream servers configured - please set them from DBus"));
+	  else
+#endif
+	  my_syslog(LOG_WARNING, _("warning: no upstream servers configured"));
+	}
     } 
 
   if (daemon->max_logs != 0)
@@ -1402,14 +1416,14 @@ static int read_event(int fd, struct event_desc *evp, char **msg)
 {
   char *buf;
 
-  if (!read_write(fd, (unsigned char *)evp, sizeof(struct event_desc), 1))
+  if (!read_write(fd, (unsigned char *)evp, sizeof(struct event_desc), RW_READ))
     return 0;
   
   *msg = NULL;
   
   if (evp->msg_sz != 0 && 
       (buf = malloc(evp->msg_sz + 1)) &&
-      read_write(fd, (unsigned char *)buf, evp->msg_sz, 1))
+      read_write(fd, (unsigned char *)buf, evp->msg_sz, RW_READ))
     {
       buf[evp->msg_sz] = 0;
       *msg = buf;
@@ -1472,7 +1486,7 @@ static void async_event(int pipe, time_t now)
 {
   pid_t p;
   struct event_desc ev;
-  int i, check = 0;
+  int wstatus, i, check = 0;
   char *msg;
   
   /* NOTE: the memory used to return msg is leaked: use msgs in events only
@@ -1523,6 +1537,7 @@ static void async_event(int pipe, time_t now)
 	  {
 	    lease_prune(NULL, now);
 	    lease_update_file(now);
+	    lease_update_dns(0);
 	  }
 #ifdef HAVE_DHCP6
 	else if (daemon->doing_ra)
@@ -1534,7 +1549,7 @@ static void async_event(int pipe, time_t now)
 		
       case EVENT_CHILD:
 	/* See Stevens 5.10 */
-	while ((p = waitpid(-1, NULL, WNOHANG)) != 0)
+	while ((p = waitpid(-1, &wstatus, WNOHANG)) != 0)
 	  if (p == -1)
 	    {
 	      if (errno != EINTR)
@@ -1545,6 +1560,20 @@ static void async_event(int pipe, time_t now)
 	      if (daemon->tcp_pids[i] == p)
 		{
 		  daemon->tcp_pids[i] = 0;
+
+		  if (!WIFEXITED(wstatus))
+		    {
+		      /* If a helper process dies, (eg with SIGSEV)
+			 log that and attempt to patch things up so that the 
+			 parent can continue to function. */
+		      my_syslog(LOG_WARNING, _("TCP helper process %u died unexpectedly"), (unsigned int)p);
+		      if (daemon->tcp_pipes[i] != -1)
+			{
+			  close(daemon->tcp_pipes[i]);
+			  daemon->tcp_pipes[i] = -1;
+			}
+		    }
+		  
 		  /* tcp_pipes == -1 && tcp_pids == 0 required to free slot */
 		  if (daemon->tcp_pipes[i] == -1)
 		    daemon->metrics[METRIC_TCP_CONNECTIONS]--;
@@ -1827,244 +1856,403 @@ static void check_dns_listeners(time_t now)
   struct listener *listener;
   struct randfd_list *rfl;
   int i;
-  int pipefd[2];
   
+  /* Note that handling events here can create or destroy fds and
+     render the result of the last poll() call invalid. Once
+     we find an fd that needs service, do it, then return to go around the
+     poll() loop again. This avoid really, really, wierd bugs. */
+
+  if (!option_bool(OPT_DEBUG))
+    for (i = 0; i < daemon->max_procs; i++)
+      if (daemon->tcp_pipes[i] != -1 &&
+	  poll_check(daemon->tcp_pipes[i], POLLIN | POLLHUP))
+	{
+	   /* Races. The child process can die before we read all of the data from the
+	      pipe, or vice versa. Therefore send tcp_pids to zero when we wait() the 
+	      process, and tcp_pipes to -1 and close the FD when we read the last
+	      of the data - indicated by cache_recv_insert returning zero.
+	      The order of these events is indeterminate, and both are needed
+	      to free the process slot. Once the child process has gone, poll()
+	      returns POLLHUP, not POLLIN, so have to check for both here. */
+	  if (!cache_recv_insert(now, daemon->tcp_pipes[i]))
+	    {
+	      close(daemon->tcp_pipes[i]);
+	      daemon->tcp_pipes[i] = -1;	
+	      /* tcp_pipes == -1 && tcp_pids == 0 required to free slot */
+	      if (daemon->tcp_pids[i] == 0)
+		daemon->metrics[METRIC_TCP_CONNECTIONS]--;
+	    }
+	  return;
+	}
+
   for (serverfdp = daemon->sfds; serverfdp; serverfdp = serverfdp->next)
     if (poll_check(serverfdp->fd, POLLIN))
-      reply_query(serverfdp->fd, now);
+      {
+	reply_query(serverfdp->fd, now);
+	return;
+      }
   
   for (i = 0; i < daemon->numrrand; i++)
     if (daemon->randomsocks[i].refcount != 0 && 
 	poll_check(daemon->randomsocks[i].fd, POLLIN))
-      reply_query(daemon->randomsocks[i].fd, now);
-
+      {
+	reply_query(daemon->randomsocks[i].fd, now);
+	return;
+      }
+  
   /* Check overflow random sockets too. */
   for (rfl = daemon->rfl_poll; rfl; rfl = rfl->next)
     if (poll_check(rfl->rfd->fd, POLLIN))
-      reply_query(rfl->rfd->fd, now);
-
-  /* Races. The child process can die before we read all of the data from the
-     pipe, or vice versa. Therefore send tcp_pids to zero when we wait() the 
-     process, and tcp_pipes to -1 and close the FD when we read the last
-     of the data - indicated by cache_recv_insert returning zero.
-     The order of these events is indeterminate, and both are needed
-     to free the process slot. Once the child process has gone, poll()
-     returns POLLHUP, not POLLIN, so have to check for both here. */
-  if (!option_bool(OPT_DEBUG))
-    for (i = 0; i < daemon->max_procs; i++)
-      if (daemon->tcp_pipes[i] != -1 &&
-	  poll_check(daemon->tcp_pipes[i], POLLIN | POLLHUP) &&
-	  !cache_recv_insert(now, daemon->tcp_pipes[i]))
-	{
-	  close(daemon->tcp_pipes[i]);
-	  daemon->tcp_pipes[i] = -1;	
-	  /* tcp_pipes == -1 && tcp_pids == 0 required to free slot */
-	  if (daemon->tcp_pids[i] == 0)
-	    daemon->metrics[METRIC_TCP_CONNECTIONS]--;
-	}
-	
+      {
+	reply_query(rfl->rfd->fd, now);
+	return;
+      }
+  
   for (listener = daemon->listeners; listener; listener = listener->next)
-    {
-      if (listener->fd != -1 && poll_check(listener->fd, POLLIN))
+    if (listener->fd != -1 && poll_check(listener->fd, POLLIN))
+      {
 	receive_query(listener, now); 
+	return;
+      }
+  
+  /* check to see if we have a free tcp process slot.
+     Note that we can't assume that because we had
+     at least one a poll() time, that we still do.
+     There may be more waiting connections after
+     poll() returns then free process slots. */
+  for (i = daemon->max_procs - 1; i >= 0; i--)
+    if (daemon->tcp_pids[i] == 0 && daemon->tcp_pipes[i] == -1)
+      break;
+
+  if (i >= 0)
+    for (listener = daemon->listeners; listener; listener = listener->next)
+      if (listener->tcpfd != -1 && poll_check(listener->tcpfd, POLLIN))
+	{
+	  do_tcp_connection(listener, now, i);
+	  return;
+	}
+}
+
+static void do_tcp_connection(struct listener *listener, time_t now, int slot)
+{
+  int confd, client_ok = 1;
+  struct irec *iface = NULL;
+  pid_t p;
+  union mysockaddr tcp_addr;
+  socklen_t tcp_len = sizeof(union mysockaddr);
+  unsigned char a = 0, *buff;
+  struct server *s; 
+  int flags, auth_dns;
+  struct in_addr netmask;
+  int pipefd[2];
+
+  while ((confd = accept(listener->tcpfd, NULL, NULL)) == -1 && errno == EINTR);
+  
+  if (confd == -1)
+    return;
+  
+  if (getsockname(confd, (struct sockaddr *)&tcp_addr, &tcp_len) == -1)
+    {
+    closeconandreturn:
+      shutdown(confd, SHUT_RDWR);
+      close(confd);
+      return;
+    }
+  
+  /* Make sure that the interface list is up-to-date.
+     
+     We do this here as we may need the results below, and
+     the DNS code needs them for --interface-name stuff.
+     
+     Multiple calls to enumerate_interfaces() per select loop are
+     inhibited, so calls to it in the child process (which doesn't select())
+     have no effect. This avoids two processes reading from the same
+     netlink fd and screwing the pooch entirely.
+  */
+  
+  enumerate_interfaces(0);
+  
+  if (option_bool(OPT_NOWILD))
+    iface = listener->iface; /* May be NULL */
+  else 
+    {
+      int if_index;
+      char intr_name[IF_NAMESIZE];
       
-      /* check to see if we have a free tcp process slot.
-	 Note that we can't assume that because we had
-	 at least one a poll() time, that we still do.
-	 There may be more waiting connections after
-	 poll() returns then free process slots. */
+      /* if we can find the arrival interface, check it's one that's allowed */
+      if ((if_index = tcp_interface(confd, tcp_addr.sa.sa_family)) != 0 &&
+	  indextoname(listener->tcpfd, if_index, intr_name))
+	{
+	  union all_addr addr;
+	  
+	  if (tcp_addr.sa.sa_family == AF_INET6)
+	    addr.addr6 = tcp_addr.in6.sin6_addr;
+	  else
+	    addr.addr4 = tcp_addr.in.sin_addr;
+	  
+	  for (iface = daemon->interfaces; iface; iface = iface->next)
+	    if (iface->index == if_index &&
+		iface->addr.sa.sa_family == tcp_addr.sa.sa_family)
+	      break;
+	  
+	  if (!iface && !loopback_exception(listener->tcpfd, tcp_addr.sa.sa_family, &addr, intr_name))
+	    client_ok = 0;
+	}
+      
+      if (option_bool(OPT_CLEVERBIND))
+	iface = listener->iface; /* May be NULL */
+      else
+	{
+	  /* Check for allowed interfaces when binding the wildcard address:
+	     we do this by looking for an interface with the same address as 
+	     the local address of the TCP connection, then looking to see if that's
+	     an allowed interface. As a side effect, we get the netmask of the
+	     interface too, for localisation. */
+	  
+	  for (iface = daemon->interfaces; iface; iface = iface->next)
+	    if (sockaddr_isequal(&iface->addr, &tcp_addr))
+	      break;
+	  
+	  if (!iface)
+	    client_ok = 0;
+	}
+    }
+  
+  if (!client_ok)
+    goto closeconandreturn;
+  
+  if (!option_bool(OPT_DEBUG))
+    {
+      if (pipe(pipefd) == -1)
+	goto closeconandreturn; /* pipe failed */
+            
+      if ((p = fork()) == -1)
+	{
+	  /* fork failed */
+	  close(pipefd[0]);
+	  close(pipefd[1]);
+	  goto closeconandreturn;
+	}
+
+      if (p != 0)
+	{
+	  /* fork() done: parent side */
+	  close(pipefd[1]); /* parent needs read pipe end. */
+      
+#ifdef HAVE_LINUX_NETWORK
+	  /* The child process inherits the netlink socket, 
+	     which it never uses, but when the parent (us) 
+	     uses it in the future, the answer may go to the 
+	     child, resulting in the parent blocking
+	     forever awaiting the result. To avoid this
+	     the child closes the netlink socket, but there's
+	     a nasty race, since the parent may use netlink
+	     before the child has done the close.
+	     
+	     To avoid this, the parent blocks here until a 
+	     single byte comes back up the pipe, which
+	     is sent by the child after it has closed the
+	     netlink socket. */
+	  
+	  read_write(pipefd[0], &a, 1, RW_READ);
+#endif
+	  
+
+	  daemon->tcp_pids[slot] = p;
+	  daemon->tcp_pipes[slot] = pipefd[0];
+	  daemon->metrics[METRIC_TCP_CONNECTIONS]++;
+	  if (daemon->metrics[METRIC_TCP_CONNECTIONS] > daemon->max_procs_used)
+	    daemon->max_procs_used = daemon->metrics[METRIC_TCP_CONNECTIONS];
+	
+	  close(confd);
+	  
+	  /* The child can use up to TCP_MAX_QUERIES ids, so skip that many. */
+	  daemon->log_id += TCP_MAX_QUERIES;
+#ifdef HAVE_DNSSEC
+	  /* It can do more if making DNSSEC queries too. */
+	  if (option_bool(OPT_DNSSEC_VALID))
+	    daemon->log_id += daemon->limit[LIMIT_WORK];
+#endif
+	  
+	  return;
+	}
+    }
+         
+  if (iface)
+    {
+      netmask = iface->netmask;
+      auth_dns = iface->dns_auth;
+    }
+  else
+    {
+      netmask.s_addr = 0;
+      auth_dns = 0;
+    }
+  
+  /* Arrange for SIGALRM after CHILD_LIFETIME seconds to
+     terminate the process. */
+  if (!option_bool(OPT_DEBUG))
+    {
+#ifdef HAVE_LINUX_NETWORK
+      /* See comment above re: netlink socket. */
+      close(daemon->netlinkfd);
+      read_write(pipefd[1], &a, 1, RW_WRITE);
+#endif		  
+      alarm(CHILD_LIFETIME);
+      close(pipefd[0]); /* close read end in child. */
+      daemon->pipe_to_parent = pipefd[1];
+    }
+
+  /* The connected socket inherits non-blocking
+     attribute from the listening socket. 
+     Reset that here. */
+  if ((flags = fcntl(confd, F_GETFL, 0)) != -1)
+    while(retry_send(fcntl(confd, F_SETFL, flags & ~O_NONBLOCK)));
+
+  buff = tcp_request(confd, now, &tcp_addr, netmask, auth_dns);
+	      
+  if (buff)
+    free(buff);
+  
+  for (s = daemon->servers; s; s = s->next)
+    if (s->tcpfd != -1)
+      {
+	shutdown(s->tcpfd, SHUT_RDWR);
+	close(s->tcpfd);
+	s->tcpfd = -1;
+      }
+  
+  if (!option_bool(OPT_DEBUG))
+    {
+      close(daemon->pipe_to_parent);
+      flush_log();
+      _exit(0);
+    }
+}
+
+
+#ifdef HAVE_DNSSEC
+/* If a DNSSEC query over UDP returns a truncated answer,
+   we swap to the TCP path. This routine is responsible for forking
+   the required process, the child then calls tcp_key_recurse() and
+   returns the result of the validation through the pipe to the parent
+   (which has also primed the cache with the relevant DS and DNSKEY records).
+   If we're in debug mode, don't fork and return the result directly, otherwise
+   return  STAT_ASYNC. The UDP validation process will restart when 
+   cache_recv_insert() calls pop_and_retry_query() after the result 
+   arrives via the pipe to the parent. */
+int swap_to_tcp(struct frec *forward, time_t now, int status, struct dns_header *header,
+		ssize_t *plen, char *name, int class, struct server *server, int *keycount, int *validatecount)
+{
+  struct server *s;
+
+  if (!option_bool(OPT_DEBUG))
+    {
+      pid_t p;
+      int i, pipefd[2];
+#ifdef HAVE_LINUX_NETWORK
+      unsigned char a = 0;
+#endif
+      
+      /* check to see if we have a free tcp process slot. */
       for (i = daemon->max_procs - 1; i >= 0; i--)
 	if (daemon->tcp_pids[i] == 0 && daemon->tcp_pipes[i] == -1)
 	  break;
-
-      if (listener->tcpfd != -1 && i >= 0 && poll_check(listener->tcpfd, POLLIN))
+      
+      /* No slots or no pipe */
+      if (i < 0 || pipe(pipefd) != 0)
+	return STAT_ABANDONED;
+				
+      if ((p = fork()) != 0)
 	{
-	  int confd, client_ok = 1;
-	  struct irec *iface = NULL;
-	  pid_t p;
-	  union mysockaddr tcp_addr;
-	  socklen_t tcp_len = sizeof(union mysockaddr);
-
-	  while ((confd = accept(listener->tcpfd, NULL, NULL)) == -1 && errno == EINTR);
-	  
-	  if (confd == -1)
-	    continue;
-	  
-	  if (getsockname(confd, (struct sockaddr *)&tcp_addr, &tcp_len) == -1)
+	  close(pipefd[1]); /* parent needs read pipe end. */
+	  if (p == -1)
 	    {
-	      close(confd);
-	      continue;
+	      /* fork() failed */
+	      close(pipefd[0]);
+	      return STAT_ABANDONED;
 	    }
-	  
-	  /* Make sure that the interface list is up-to-date.
+
+#ifdef HAVE_LINUX_NETWORK
+	  /* The child process inherits the netlink socket, 
+	     which it never uses, but when the parent (us) 
+	     uses it in the future, the answer may go to the 
+	     child, resulting in the parent blocking
+	     forever awaiting the result. To avoid this
+	     the child closes the netlink socket, but there's
+	     a nasty race, since the parent may use netlink
+	     before the child has done the close.
 	     
-	     We do this here as we may need the results below, and
-	     the DNS code needs them for --interface-name stuff.
-
-	     Multiple calls to enumerate_interfaces() per select loop are
-	     inhibited, so calls to it in the child process (which doesn't select())
-	     have no effect. This avoids two processes reading from the same
-	     netlink fd and screwing the pooch entirely.
-	  */
- 
-	  enumerate_interfaces(0);
-	  
-	  if (option_bool(OPT_NOWILD))
-	    iface = listener->iface; /* May be NULL */
-	  else 
-	    {
-	      int if_index;
-	      char intr_name[IF_NAMESIZE];
-	      
-	      /* if we can find the arrival interface, check it's one that's allowed */
-	      if ((if_index = tcp_interface(confd, tcp_addr.sa.sa_family)) != 0 &&
-		  indextoname(listener->tcpfd, if_index, intr_name))
-		{
-		  union all_addr addr;
-		  
-		  if (tcp_addr.sa.sa_family == AF_INET6)
-		    addr.addr6 = tcp_addr.in6.sin6_addr;
-		  else
-		    addr.addr4 = tcp_addr.in.sin_addr;
-		  
-		  for (iface = daemon->interfaces; iface; iface = iface->next)
-		    if (iface->index == if_index &&
-		        iface->addr.sa.sa_family == tcp_addr.sa.sa_family)
-		      break;
-		  
-		  if (!iface && !loopback_exception(listener->tcpfd, tcp_addr.sa.sa_family, &addr, intr_name))
-		    client_ok = 0;
-		}
-	      
-	      if (option_bool(OPT_CLEVERBIND))
-		iface = listener->iface; /* May be NULL */
-	      else
-		{
-		  /* Check for allowed interfaces when binding the wildcard address:
-		     we do this by looking for an interface with the same address as 
-		     the local address of the TCP connection, then looking to see if that's
-		     an allowed interface. As a side effect, we get the netmask of the
-		     interface too, for localisation. */
-		  
-		  for (iface = daemon->interfaces; iface; iface = iface->next)
-		    if (sockaddr_isequal(&iface->addr, &tcp_addr))
-		      break;
-		  
-		  if (!iface)
-		    client_ok = 0;
-		}
-	    }
-	  
-	  if (!client_ok)
-	    {
-	      shutdown(confd, SHUT_RDWR);
-	      close(confd);
-	    }
-	  else if (!option_bool(OPT_DEBUG) && pipe(pipefd) == 0 && (p = fork()) != 0)
-	    {
-	      close(pipefd[1]); /* parent needs read pipe end. */
-	      if (p == -1)
-		close(pipefd[0]);
-	      else
-		{
-#ifdef HAVE_LINUX_NETWORK
-		  /* The child process inherits the netlink socket, 
-		     which it never uses, but when the parent (us) 
-		     uses it in the future, the answer may go to the 
-		     child, resulting in the parent blocking
-		     forever awaiting the result. To avoid this
-		     the child closes the netlink socket, but there's
-		     a nasty race, since the parent may use netlink
-		     before the child has done the close.
-		     
-		     To avoid this, the parent blocks here until a 
-		     single byte comes back up the pipe, which
-		     is sent by the child after it has closed the
-		     netlink socket. */
-		  
-		  unsigned char a;
-		  read_write(pipefd[0], &a, 1, 1);
+	     To avoid this, the parent blocks here until a 
+	     single byte comes back up the pipe, which
+	     is sent by the child after it has closed the
+	     netlink socket. */
+	  read_write(pipefd[0], &a, 1, RW_READ);
 #endif
+	  
+	  /* i holds index of free slot */
+	  daemon->tcp_pids[i] = p;
+	  daemon->tcp_pipes[i] = pipefd[0];
+	  daemon->metrics[METRIC_TCP_CONNECTIONS]++;
+	  if (daemon->metrics[METRIC_TCP_CONNECTIONS] > daemon->max_procs_used)
+	    daemon->max_procs_used = daemon->metrics[METRIC_TCP_CONNECTIONS];
 
-		  /* i holds index of free slot */
-		  daemon->tcp_pids[i] = p;
-		  daemon->tcp_pipes[i] = pipefd[0];
-		  daemon->metrics[METRIC_TCP_CONNECTIONS]++;
-		  if (daemon->metrics[METRIC_TCP_CONNECTIONS] > daemon->max_procs_used)
-		    daemon->max_procs_used = daemon->metrics[METRIC_TCP_CONNECTIONS];
-		}
-	      close(confd);
+	  /* child can use a maximum of this many log serials. */
+	  daemon->log_id += daemon->limit[LIMIT_WORK];
 
-	      /* The child can use up to TCP_MAX_QUERIES ids, so skip that many. */
-	      daemon->log_id += TCP_MAX_QUERIES;
-	    }
-	  else
-	    {
-	      unsigned char *buff;
-	      struct server *s; 
-	      int flags;
-	      struct in_addr netmask;
-	      int auth_dns;
-	   
-	      if (iface)
-		{
-		  netmask = iface->netmask;
-		  auth_dns = iface->dns_auth;
-		}
-	      else
-		{
-		  netmask.s_addr = 0;
-		  auth_dns = 0;
-		}
-
-	      /* Arrange for SIGALRM after CHILD_LIFETIME seconds to
-		 terminate the process. */
-	      if (!option_bool(OPT_DEBUG))
-		{
+	  /* tell the caller we've forked. */
+	  return STAT_ASYNC;
+	}
+      else
+	{
+	  /* child starts here. */
 #ifdef HAVE_LINUX_NETWORK
-		  /* See comment above re: netlink socket. */
-		  unsigned char a = 0;
-
-		  close(daemon->netlinkfd);
-		  read_write(pipefd[1], &a, 1, 0);
+	  /* See comment above re: netlink socket. */
+	  close(daemon->netlinkfd);
+	  read_write(pipefd[1], &a, 1, RW_WRITE);
 #endif		  
-		  alarm(CHILD_LIFETIME);
-		  close(pipefd[0]); /* close read end in child. */
-		  daemon->pipe_to_parent = pipefd[1];
-		}
-
-	      /* start with no upstream connections. */
-	      for (s = daemon->servers; s; s = s->next)
-		 s->tcpfd = -1; 
-	      
-	      /* The connected socket inherits non-blocking
-		 attribute from the listening socket. 
-		 Reset that here. */
-	      if ((flags = fcntl(confd, F_GETFL, 0)) != -1)
-		while(retry_send(fcntl(confd, F_SETFL, flags & ~O_NONBLOCK)));
-	      
-	      buff = tcp_request(confd, now, &tcp_addr, netmask, auth_dns);
-	       
-	      if (buff)
-		free(buff);
-	      
-	      for (s = daemon->servers; s; s = s->next)
-		if (s->tcpfd != -1)
-		  {
-		    shutdown(s->tcpfd, SHUT_RDWR);
-		    close(s->tcpfd);
-		  }
-	      
-	      if (!option_bool(OPT_DEBUG))
-		{
-		  close(daemon->pipe_to_parent);
-		  flush_log();
-		  _exit(0);
-		}
-	    }
+	  close(pipefd[0]); /* close read end in child. */
+	  daemon->pipe_to_parent = pipefd[1];	  
 	}
     }
+  
+  status = tcp_from_udp(now, status, header, plen, class, name, server, keycount, validatecount);
+  
+  /* close upstream connections. */
+  for (s = daemon->servers; s; s = s->next)
+    if (s->tcpfd != -1)
+      {
+	shutdown(s->tcpfd, SHUT_RDWR);
+	close(s->tcpfd);
+	s->tcpfd = -1;
+      }
+  
+   if (!option_bool(OPT_DEBUG))
+     {
+       ssize_t m = -2;
+
+       /* tell our parent we're done, and what the result was then exit. */
+       read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)&status, sizeof(status), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)plen, sizeof(*plen), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)header, *plen, RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)&forward, sizeof(forward), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)&forward->uid, sizeof(forward->uid), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)keycount, sizeof(*keycount), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)&keycount, sizeof(keycount), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)validatecount, sizeof(*validatecount), RW_WRITE);
+       read_write(daemon->pipe_to_parent, (unsigned char *)&validatecount, sizeof(validatecount), RW_WRITE);
+       close(daemon->pipe_to_parent);
+       
+       flush_log();
+       _exit(0);
+     }
+   
+   /* path for debug mode. */
+   return status;
 }
+#endif
+
 
 #ifdef HAVE_DHCP
 int make_icmp_sock(void)

src/dnsmasq.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
  
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -14,7 +14,7 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#define COPYRIGHT "Copyright (c) 2000-2024 Simon Kelley"
+#define COPYRIGHT "Copyright (c) 2000-2025 Simon Kelley"
 
 /* We do defines that influence behavior of stdio.h, so complain
    if included too early. */
@@ -155,11 +155,7 @@ extern int capget(cap_user_header_t header, cap_user_data_t data);
 #include <priv.h>
 #endif
 
-/* Backwards compat with 2.83 */
-#if defined(HAVE_NETTLEHASH)
-#  define HAVE_CRYPTOHASH
-#endif
-#if defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH)
+#if defined(HAVE_DNSSEC)
 #  include <nettle/nettle-meta.h>
 #endif
 
@@ -282,7 +278,10 @@ struct event_desc {
 #define OPT_NO_IDENT       70
 #define OPT_CACHE_RR       71
 #define OPT_LOCALHOST_SERVICE  72
-#define OPT_LAST           73
+#define OPT_LOG_PROTO      73
+#define OPT_NO_0x20        74
+#define OPT_DO_0x20        75
+#define OPT_LAST           76
 
 #define OPTION_BITS (sizeof(unsigned int)*8)
 #define OPTION_SIZE ( (OPT_LAST/OPTION_BITS)+((OPT_LAST%OPTION_BITS)!=0) )
@@ -341,8 +340,8 @@ union all_addr {
      in the cache flags. */
   struct datablock {
     unsigned short rrtype;
-    unsigned char datalen;
-    char data[];
+    unsigned char datalen; /* also length of SOA in negative records. */
+    char data[1];
   } rrdata;
 };
 
@@ -456,6 +455,11 @@ struct host_record {
 #define INP4 4
 #define INP6 8
 
+#define RW_WRITE      0
+#define RW_READ       1
+#define RW_WRITE_ONCE 2
+#define RW_READ_ONCE  3
+
 struct interface_name {
   char *name; /* domain name */
   char *intr; /* interface name */
@@ -597,8 +601,7 @@ struct server {
   char interface[IF_NAMESIZE+1];
   unsigned int ifindex; /* corresponding to interface, above */
   struct serverfd *sfd; 
-  int tcpfd, edns_pktsz;
-  time_t pktsz_reduced;
+  int tcpfd;
   unsigned int queries, failed_queries, nxdomain_replies, retrys;
   unsigned int query_latency, mma_latency;
   time_t forwardtime;
@@ -747,6 +750,7 @@ struct dyndir {
 #define STAT_SECURE_WILDCARD    0x70000
 #define STAT_OK                 0x80000
 #define STAT_ABANDONED          0x90000
+#define STAT_ASYNC              0xa0000
 
 #define DNSSEC_FAIL_NYV         0x0001 /* key not yet valid */
 #define DNSSEC_FAIL_EXP         0x0002 /* key expired */
@@ -757,6 +761,9 @@ struct dyndir {
 #define DNSSEC_FAIL_NONSEC      0x0040 /* No NSEC */
 #define DNSSEC_FAIL_NODSSUP     0x0080 /* no supported DS algo. */
 #define DNSSEC_FAIL_NOKEY       0x0100 /* no DNSKEY */
+#define DNSSEC_FAIL_NSEC3_ITERS 0x0200 /* too many iterations in NSEC3 */
+#define DNSSEC_FAIL_BADPACKET   0x0400 /* bad packet */
+#define DNSSEC_FAIL_WORK        0x0800 /* too much crypto */
 
 #define STAT_ISEQUAL(a, b)  (((a) & 0xffff0000) == (b))
 
@@ -767,20 +774,17 @@ struct dyndir {
 #define FREC_DS_QUERY          16
 #define FREC_AD_QUESTION       32
 #define FREC_DO_QUESTION       64
-#define FREC_ADDED_PHEADER    128
-#define FREC_TEST_PKTSZ       256
-#define FREC_HAS_EXTRADATA    512
-#define FREC_HAS_PHEADER     1024
-
-#define HASH_SIZE 32 /* SHA-256 digest size */
+#define FREC_HAS_PHEADER      128
+#define FREC_GONE_TO_TCP      256
+#define FREC_ANSWER           512
 
 struct frec {
   struct frec_src {
     union mysockaddr source;
     union all_addr dest;
-    unsigned int iface, log_id;
+    unsigned int iface, log_id, encode_bitmap, *encode_bigmap;
     int fd;
-    unsigned short orig_id;
+    unsigned short orig_id, udp_pkt_size;
     struct frec_src *next;
   } frec_src;
   struct server *sentto; /* NULL means free */
@@ -790,11 +794,10 @@ struct frec {
   time_t time;
   u32 forward_timestamp;
   int forward_delay;
-  unsigned char *hash[HASH_SIZE];
-  struct blockdata *stash; /* Saved reply, whilst we validate */
+  struct blockdata *stash; /* saved query or saved reply, whilst we validate */
   size_t stash_len;
 #ifdef HAVE_DNSSEC 
-  int class, work_counter;
+  int uid, class, work_counter, validate_counter;
   struct frec *dependent; /* Query awaiting internally-generated DNSKEY or DS query */
   struct frec *next_dependent; /* list of above. */
   struct frec *blocking_query; /* Query which is blocking us. */
@@ -831,6 +834,12 @@ struct frec {
 #define LEASE_HAVE_HWADDR  128  /* Have set hwaddress */
 #define LEASE_EXP_CHANGED  256  /* Lease expiry time changed */
 
+#define LIMIT_SIG_FAIL    0
+#define LIMIT_CRYPTO      1
+#define LIMIT_WORK        2
+#define LIMIT_NSEC3_ITERS 3
+#define LIMIT_MAX         4
+
 struct dhcp_lease {
   int clid_len;          /* length of client identifier */
   unsigned char *clid;   /* clientid */
@@ -951,6 +960,7 @@ struct dhcp_opt {
 #define DHOPT_TAGOK           4096
 #define DHOPT_ADDR6           8192
 #define DHOPT_VENDOR_PXE     16384
+#define DHOPT_PXE_OPT        32768
 
 struct dhcp_boot {
   char *file, *sname, *tftp_sname;
@@ -1117,7 +1127,10 @@ struct tftp_prefix {
 };
 
 struct dhcp_relay {
-  union all_addr local, server;
+  union {
+    struct in_addr addr4;
+    struct in6_addr addr6;
+  } local, server;
   char *interface; /* Allowable interface for replies from server, and dest for IPv6 multicast */
   int iface_index; /* working - interface in which requests arrived, for return */
   int port;        /* Port of relay we forward to. */
@@ -1233,16 +1246,14 @@ extern struct daemon {
   char *packet; /* packet buffer */
   int packet_buff_sz; /* size of above */
   char *namebuff; /* MAXDNAME size buffer */
-#if (defined(HAVE_CONNTRACK) && defined(HAVE_UBUS)) || defined(HAVE_DNSSEC)
-  /* CONNTRACK UBUS code uses this buffer, as well as DNSSEC code. */
   char *workspacename;
-#endif
 #ifdef HAVE_DNSSEC
-  char *keyname; /* MAXDNAME size buffer */
+  char *keyname, *cname; /* MAXDNAME size buffer */
   unsigned long *rr_status; /* ceiling in TTL from DNSSEC or zero for insecure */
   int rr_status_sz;
   int dnssec_no_time_check;
   int back_to_the_future;
+  int limit[LIMIT_MAX];
 #endif
   struct frec *frec_list;
   struct frec_src *free_frec_src;
@@ -1376,24 +1387,24 @@ int is_name_synthetic(int flags, char *name, union all_addr *addr);
 int is_rev_synth(int flag, union all_addr *addr, char *name);
 
 /* rfc1035.c */
+int do_doctor(struct dns_header *header, size_t qlen, char *namebuff);
 int extract_name(struct dns_header *header, size_t plen, unsigned char **pp, 
-                 char *name, int isExtract, int extrabytes);
+                 char *name, int func, unsigned int parm);
 unsigned char *skip_name(unsigned char *ansp, struct dns_header *header, size_t plen, int extrabytes);
 unsigned char *skip_questions(struct dns_header *header, size_t plen);
 unsigned char *skip_section(unsigned char *ansp, int count, struct dns_header *header, size_t plen);
-unsigned int extract_request(struct dns_header *header, size_t qlen, 
-			       char *name, unsigned short *typep);
+unsigned int extract_request(struct dns_header *header, size_t qlen, char *name,
+			     unsigned short *typep, unsigned short *classp);
 void setup_reply(struct dns_header *header, unsigned int flags, int ede);
 int extract_addresses(struct dns_header *header, size_t qlen, char *name,
 		      time_t now, struct ipsets *ipsets, struct ipsets *nftsets, int is_sign,
-                      int check_rebind, int no_cache_dnssec, int secure, int *doctored);
+                      int check_rebind, int no_cache_dnssec, int secure);
 #if defined(HAVE_CONNTRACK) && defined(HAVE_UBUS)
 void report_addresses(struct dns_header *header, size_t len, u32 mark);
 #endif
 size_t answer_request(struct dns_header *header, char *limit, size_t qlen,  
 		      struct in_addr local_addr, struct in_addr local_netmask, 
-		      time_t now, int ad_reqd, int do_bit, int have_pseudoheader,
-		      int *stale, int *filtered);
+		      time_t now, int ad_reqd, int do_bit, int no_cache, int *stale, int *filtered);
 int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name, 
 			     time_t now);
 int check_for_ignored_address(struct dns_header *header, size_t qlen);
@@ -1405,32 +1416,34 @@ int add_resource_record(struct dns_header *header, char *limit, int *truncp,
 			int *offset, unsigned short type, unsigned short class, char *format, ...);
 int in_arpa_name_2_addr(char *namein, union all_addr *addrp);
 int private_net(struct in_addr addr, int ban_localhost);
+/* extract_name ops */
+#define EXTR_NAME_EXTRACT   1
+#define EXTR_NAME_COMPARE   2
+#define EXTR_NAME_NOCASE    3
+#define EXTR_NAME_FLIP      4
 
 /* auth.c */
 #ifdef HAVE_AUTH
 size_t answer_auth(struct dns_header *header, char *limit, size_t qlen, 
-		   time_t now, union mysockaddr *peer_addr, int local_query,
-		   int do_bit, int have_pseudoheader);
+		   time_t now, union mysockaddr *peer_addr, int local_query);
 int in_zone(struct auth_zone *zone, char *name, char **cut);
 #endif
 
 /* dnssec.c */
 #ifdef HAVE_DNSSEC
-size_t dnssec_generate_query(struct dns_header *header, unsigned char *end, char *name, int class, int type, int edns_pktsz);
-int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
-int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
+size_t dnssec_generate_query(struct dns_header *header, unsigned char *end, char *name, int class, int id, int type);
+int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t plen, char *name,
+			  char *keyname, int class, int *validate_count);
+int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name,
+		       char *keyname, int class, int *validate_count);
 int dnssec_validate_reply(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int *class,
-			  int check_unsigned, int *neganswer, int *nons, int *nsec_ttl);
+			  int check_unsigned, int *neganswer, int *nons, int *nsec_ttl, int *validate_count);
 int dnskey_keytag(int alg, int flags, unsigned char *key, int keylen);
 size_t filter_rrsigs(struct dns_header *header, size_t plen);
 int setup_timestamp(void);
 int errflags_to_ede(int status);
 #endif
 
-/* hash_questions.c */
-void hash_questions_init(void);
-unsigned char *hash_questions(struct dns_header *header, size_t plen, char *name);
-
 /* crypto.c */
 const struct nettle_hash *hash_find(char *name);
 int hash_init(const struct nettle_hash *hash, void **ctxp, unsigned char **digestp);
@@ -1513,6 +1526,13 @@ int option_read_dynfile(char *file, int flags);
 /* forward.c */
 void reply_query(int fd, time_t now);
 void receive_query(struct listener *listen, time_t now);
+void return_reply(time_t now, struct frec *forward, struct dns_header *header, ssize_t n, int status);
+#ifdef HAVE_DNSSEC
+void pop_and_retry_query(struct frec *forward, int status, time_t now);
+int tcp_from_udp(time_t now, int status, struct dns_header *header, ssize_t *n, 
+		 int class, char *name, struct server *server, 
+		 int *keycount, int *validatecount);
+#endif
 unsigned char *tcp_request(int confd, time_t now,
 			   union mysockaddr *local_addr, struct in_addr netmask, int auth_dns);
 void server_gone(struct server *server);
@@ -1632,6 +1652,10 @@ void queue_event(int event);
 void send_alarm(time_t event, time_t now);
 void send_event(int fd, int event, int data, char *msg);
 void clear_cache_and_reload(time_t now);
+#ifdef HAVE_DNSSEC
+int swap_to_tcp(struct frec *forward, time_t now, int status, struct dns_header *header,
+		ssize_t *plen, char *name, int class, struct server *server, int *keycount, int *validatecount);
+#endif
 
 /* netlink.c */
 #ifdef HAVE_LINUX_NETWORK
@@ -1649,7 +1673,13 @@ void route_sock(void);
 #endif
 
 /* bpf.c or netlink.c */
-int iface_enumerate(int family, void *parm, int (callback)());
+typedef union {
+	int (*af_unspec)(int family, void *addrp, char *mac, size_t maclen, void *parmv);
+	int (*af_inet)(struct in_addr local, int if_index, char *label, struct in_addr netmask, struct in_addr broadcast, void *vparam);
+	int (*af_inet6)(struct in6_addr *local, int prefix, int scope, int if_index, int flags, unsigned int preferred, unsigned int valid, void *vparam);
+	int (*af_local)(int index, unsigned int type, char *mac, size_t maclen, void *parm);
+} callback_t;
+int iface_enumerate(int family, void *parm, callback_t callback);
 
 /* dbus.c */
 #ifdef HAVE_DBUS
@@ -1763,8 +1793,9 @@ int do_snoop_script_run(void);
 void dhcp_common_init(void);
 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg);
 struct dhcp_netid *run_tag_if(struct dhcp_netid *tags);
+int pxe_ok(struct dhcp_opt *opt, int pxemode);
 struct dhcp_netid *option_filter(struct dhcp_netid *tags, struct dhcp_netid *context_tags,
-				 struct dhcp_opt *opts);
+				 struct dhcp_opt *opts, int pxemode);
 int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int tagnotneeded);
 char *strip_hostname(char *hostname);
 void log_tags(struct dhcp_netid *netid, u32 xid);
@@ -1854,7 +1885,7 @@ void from_wire(char *name);
 unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
 				   size_t *len, unsigned char **p, int *is_sign, int *is_last);
 size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *limit, 
-			unsigned short udp_sz, int optno, unsigned char *opt, size_t optlen, int set_do, int replace);
+			int optno, unsigned char *opt, size_t optlen, int set_do, int replace);
 size_t add_do_bit(struct dns_header *header, size_t plen, unsigned char *limit);
 size_t add_edns0_config(struct dns_header *header, size_t plen, unsigned char *limit, 
 			union mysockaddr *source, time_t now, int *cacheable);

src/domain-match.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -94,8 +94,7 @@ void build_server_array(void)
    server=/.example.com/ works.
 
    A flag of F_SERVER returns an upstream server only.
-   A flag of F_DNSSECOK returns a DNSSEC capable server only and
-   also disables NODOTS servers from consideration.
+   A flag of F_DNSSECOK disables NODOTS servers from consideration.
    A flag of F_DOMAINSRV returns a domain-specific server only.
    A flag of F_CONFIG returns anything that generates a local
    reply of IPv4 or IPV6.
@@ -338,12 +337,8 @@ int filter_servers(int seed, int flags, int *lowout, int *highout)
 		      
 		      if (i != nlow)
 			{
-			  /* If we want a server that can do DNSSEC, and this one can't, 
-			     return nothing, similarly if were looking only for a server
-			     for a particular domain. */
-			  if ((flags & F_DNSSECOK) && !(daemon->serverarray[nlow]->flags & SERV_DO_DNSSEC))
-			    nlow = nhigh;
-			  else if ((flags & F_DOMAINSRV) && daemon->serverarray[nlow]->domain_len == 0)
+			  /* If we want a server for a particular domain, and this one isn't, return nothing. */
+			  if ((flags & F_DOMAINSRV) && daemon->serverarray[nlow]->domain_len == 0)
 			    nlow = nhigh;
 			  else
 			    nhigh = i;
@@ -351,7 +346,7 @@ int filter_servers(int seed, int flags, int *lowout, int *highout)
 		      else
 			{
 			  /* --local=/domain/, only return if we don't need a server. */
-			  if (flags & (F_DNSSECOK | F_DOMAINSRV | F_SERVER))
+			  if (flags & (F_DOMAINSRV | F_SERVER))
 			    nhigh = i;
 			}
 		    }
@@ -405,11 +400,19 @@ size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header
   int start;
   union all_addr addr;
   
+  setup_reply(header, flags, ede);
+
   if (flags & (F_NXDOMAIN | F_NOERR))
     log_query(flags | gotname | F_NEG | F_CONFIG | F_FORWARD, name, NULL, NULL, 0);
-	  
-  setup_reply(header, flags, ede);
-	  
+
+  if (flags & F_RCODE)
+     {
+       union all_addr a;
+       a.log.rcode = RCODE(header);
+       a.log.ede = ede;
+       log_query(F_UPSTREAM | F_RCODE, "opcode", &a, NULL, 0);
+     }
+  
   if (!(p = skip_questions(header, size)))
     return 0;
 	  
@@ -444,7 +447,13 @@ size_t make_local_answer(int flags, int gotname, size_t size, struct dns_header
       }
 
   if (trunc)
-    header->hb3 |= HB3_TC;
+    {
+      header->hb3 |= HB3_TC;
+      if (!(p = skip_questions(header, size)))
+	return 0; /* bad packet */
+      anscount  = 0;
+    }
+  
   header->ancount = htons(anscount);
   
   return p - (unsigned char *)header;
@@ -458,7 +467,7 @@ int dnssec_server(struct server *server, char *keyname, int *firstp, int *lastp)
   /* Find server to send DNSSEC query to. This will normally be the 
      same as for the original query, but may be another if
      servers for domains are involved. */		      
-  if (!lookup_domain(keyname, F_DNSSECOK, &first, &last))
+  if (!lookup_domain(keyname, F_SERVER | F_DNSSECOK, &first, &last))
     return -1;
 
   for (index = first; index != last; index++)
@@ -541,9 +550,9 @@ static int order_qsort(const void *a, const void *b)
 
   /* Finally, order by appearance in /etc/resolv.conf etc, for --strict-order */
   if (rc == 0)
-    if (!(s1->flags & SERV_LITERAL_ADDRESS))
+    if (!(s1->flags & SERV_IS_LOCAL) && !(s2->flags & SERV_IS_LOCAL))
       rc = s1->serial - s2->serial;
-
+  
   return rc;
 }
 
@@ -739,12 +748,14 @@ int add_update_server(int flags,
 	serv->addr = *addr;
       if (source_addr)
 	serv->source_addr = *source_addr;
+
+      serv->tcpfd = -1;
     }
     
   serv->flags = flags;
   serv->domain = alloc_domain;
   serv->domain_len = strlen(alloc_domain);
-  
+    
   return 1;
 }
 

src/domain.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -115,26 +115,15 @@ int is_name_synthetic(int flags, char *name, union all_addr *addrp)
 	  
 	  *p = 0;	
 	  
-	  if (prot == AF_INET6 && strstr(tail, "--ffff-") == tail)
-	    {
-	      /* special hack for v4-mapped. */
-	      memcpy(tail, "::ffff:", 7);
-	      for (p = tail + 7; *p; p++)
-		if (*p == '-')
+	  /* swap . or : for - */
+	  for (p = tail; *p; p++)
+	    if (*p == '-')
+	      {
+		if (prot == AF_INET)
 		  *p = '.';
-	    }
-	  else
-	    {
-	      /* swap . or : for - */
-	      for (p = tail; *p; p++)
-		if (*p == '-')
-		  {
-		    if (prot == AF_INET)
-		      *p = '.';
-		    else
-		      *p = ':';
-		  }
-	    }
+		else
+		  *p = ':';
+	      }
 	  
 	  if (hostname_isequal(c->domain, p+1) && inet_pton(prot, tail, &addr))
 	    found = (prot == AF_INET) ? match_domain(addr.addr4, c) : match_domain6(&addr.addr6, c);
@@ -194,9 +183,8 @@ int is_rev_synth(int flag, union all_addr *addr, char *name)
 
    if ((flag & F_IPV6) && (c = search_domain6(&addr->addr6, daemon->synth_domains))) 
      {
-       char *p;
-       
        *name = 0;
+
        if (c->indexed)
 	 {
 	   u64 index = addr6part(&addr->addr6) - addr6part(&c->start6);
@@ -204,24 +192,17 @@ int is_rev_synth(int flag, union all_addr *addr, char *name)
 	 }
        else
 	 {
-	   if (c->prefix)
-	     strncpy(name, c->prefix, MAXDNAME - ADDRSTRLEN);
-       
-	   inet_ntop(AF_INET6, &addr->addr6, name + strlen(name), ADDRSTRLEN);
+	   int i;
+	   char frag[6];
 
-	   /* IPv6 presentation address can start with ":", but valid domain names
-	      cannot start with "-" so prepend a zero in that case. */
-	   if (!c->prefix && *name == ':')
+	   if (c->prefix)
+	     strncpy(name, c->prefix, MAXDNAME);
+	   
+	   for (i = 0; i < 16; i += 2)
 	     {
-	       *name = '0';
-	       inet_ntop(AF_INET6, &addr->addr6, name+1, ADDRSTRLEN);
+	       sprintf(frag, "%s%02x%02x",  i == 0 ? "" : "-", addr->addr6.s6_addr[i], addr->addr6.s6_addr[i+1]);
+	       strncat(name, frag, MAXDNAME);
 	     }
-	   
-	   /* V4-mapped have periods.... */
-	   for (p = name; *p; p++)
-	     if (*p == ':' || *p == '.')
-	       *p = '-';
-	   
 	 }
 
        strncat(name, ".", MAXDNAME);

src/dump.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -51,31 +51,39 @@ void dump_init(void)
 
   packet_count = 0;
   
+  header.magic_number = 0xa1b2c3d4;
+  header.version_major = 2;
+  header.version_minor = 4;
+  header.thiszone = 0;
+  header.sigfigs = 0;
+  header.snaplen = daemon->edns_pktsz + 200; /* slop for IP/UDP headers */
+  header.network = 101; /* DLT_RAW http://www.tcpdump.org/linktypes.html */
+
   if (stat(daemon->dump_file, &buf) == -1)
     {
       /* doesn't exist, create and add header */
-      header.magic_number = 0xa1b2c3d4;
-      header.version_major = 2;
-      header.version_minor = 4;
-      header.thiszone = 0;
-      header.sigfigs = 0;
-      header.snaplen = daemon->edns_pktsz + 200; /* slop for IP/UDP headers */
-      header.network = 101; /* DLT_RAW http://www.tcpdump.org/linktypes.html */
-
       if (errno != ENOENT ||
 	  (daemon->dumpfd = creat(daemon->dump_file, S_IRUSR | S_IWUSR)) == -1 ||
-	  !read_write(daemon->dumpfd, (void *)&header, sizeof(header), 0))
+	  !read_write(daemon->dumpfd, (void *)&header, sizeof(header), RW_WRITE))
 	die(_("cannot create %s: %s"), daemon->dump_file, EC_FILE);
     }
+  else if (S_ISFIFO(buf.st_mode))
+    {
+      /* File is named pipe (with wireshark on the other end, probably.)
+	 Send header. */
+      if  ((daemon->dumpfd = open(daemon->dump_file, O_APPEND | O_RDWR)) == -1 ||
+	   !read_write(daemon->dumpfd, (void *)&header, sizeof(header), RW_WRITE))
+	die(_("cannot open pipe %s: %s"), daemon->dump_file, EC_FILE);
+    }
   else if ((daemon->dumpfd = open(daemon->dump_file, O_APPEND | O_RDWR)) == -1 ||
-	   !read_write(daemon->dumpfd, (void *)&header, sizeof(header), 1))
+	   !read_write(daemon->dumpfd, (void *)&header, sizeof(header), RW_READ))
     die(_("cannot access %s: %s"), daemon->dump_file, EC_FILE);
   else if (header.magic_number != 0xa1b2c3d4)
     die(_("bad header in %s"), daemon->dump_file, EC_FILE);
   else
     {
       /* count existing records */
-      while (read_write(daemon->dumpfd, (void *)&pcap_header, sizeof(pcap_header), 1))
+      while (read_write(daemon->dumpfd, (void *)&pcap_header, sizeof(pcap_header), RW_READ))
 	{
 	  lseek(daemon->dumpfd, pcap_header.incl_len, SEEK_CUR);
 	  packet_count++;
@@ -280,12 +288,12 @@ static void do_dump_packet(int mask, void *packet, size_t len,
   pcap_header.ts_usec = time.tv_usec;
   
   if (rc == -1 ||
-      !read_write(daemon->dumpfd, (void *)&pcap_header, sizeof(pcap_header), 0) ||
-      !read_write(daemon->dumpfd, iphdr, ipsz, 0) ||
-      (proto == IPPROTO_UDP && !read_write(daemon->dumpfd, (void *)&udp, sizeof(udp), 0)) ||
-      !read_write(daemon->dumpfd, (void *)packet, len, 0))
+      !read_write(daemon->dumpfd, (void *)&pcap_header, sizeof(pcap_header), RW_WRITE) ||
+      !read_write(daemon->dumpfd, iphdr, ipsz, RW_WRITE) ||
+      (proto == IPPROTO_UDP && !read_write(daemon->dumpfd, (void *)&udp, sizeof(udp), RW_WRITE)) ||
+      !read_write(daemon->dumpfd, (void *)packet, len, RW_WRITE))
     my_syslog(LOG_ERR, _("failed to write packet dump"));
-  else if (option_bool(OPT_EXTRALOG))
+  else if (option_bool(OPT_EXTRALOG) && (mask & 0x00ff))
     my_syslog(LOG_INFO, _("%u dumping packet %u mask 0x%04x"),  daemon->log_display_id, ++packet_count, mask);
   else
     my_syslog(LOG_INFO, _("dumping packet %u mask 0x%04x"), ++packet_count, mask);

src/edns0.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -96,9 +96,12 @@ unsigned char *find_pseudoheader(struct dns_header *header, size_t plen, size_t
 }
  
 
-/* replace == 2 ->delete existing option only. */
+/* replace == 0 ->don't replace existing option
+   replace == 1 ->replace existing or add option
+   replace == 2 ->relpace existing option only.
+*/
 size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *limit, 
-			unsigned short udp_sz, int optno, unsigned char *opt, size_t optlen, int set_do, int replace)
+			int optno, unsigned char *opt, size_t optlen, int set_do, int replace)
 { 
   unsigned char *lenp, *datap, *p, *udp_len, *buff = NULL;
   int rdlen = 0, is_sign, is_last;
@@ -114,9 +117,10 @@ size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *l
       /* Existing header */
       int i;
       unsigned short code, len;
-
+      
       p = udp_len;
-      GETSHORT(udp_sz, p);
+
+      PUTSHORT(daemon->edns_pktsz, p);
       GETSHORT(rcode, p);
       GETSHORT(flags, p);
 
@@ -197,12 +201,12 @@ size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *l
 	  free(buff);
 	  return plen; /* bad packet */
 	}
-      
+
       *p++ = 0; /* empty name */
       PUTSHORT(T_OPT, p);
-      PUTSHORT(udp_sz, p); /* max packet length, 512 if not given in EDNS0 header */
-      PUTSHORT(rcode, p);    /* extended RCODE and version */
-      PUTSHORT(flags, p); /* DO flag */
+      PUTSHORT(daemon->edns_pktsz, p); /* max packet length, 512 if not given in EDNS0 header */
+      PUTSHORT(rcode, p);  /* extended RCODE and version */
+      PUTSHORT(flags, p);  /* DO flag */
       lenp = p;
       PUTSHORT(rdlen, p);    /* RDLEN */
       datap = p;
@@ -245,7 +249,7 @@ size_t add_pseudoheader(struct dns_header *header, size_t plen, unsigned char *l
 
 size_t add_do_bit(struct dns_header *header, size_t plen, unsigned char *limit)
 {
-  return add_pseudoheader(header, plen, (unsigned char *)limit, PACKETSZ, 0, NULL, 0, 1, 0);
+  return add_pseudoheader(header, plen, (unsigned char *)limit, 0, NULL, 0, 1, 0);
 }
 
 static unsigned char char64(unsigned char c)
@@ -290,7 +294,7 @@ static size_t add_dns_client(struct dns_header *header, size_t plen, unsigned ch
     replace = 2;
 
   if (replace != 0 || maclen == 6)
-    plen = add_pseudoheader(header, plen, limit, PACKETSZ, EDNS0_OPTION_NOMDEVICEID, (unsigned char *)encode, strlen(encode), 0, replace);
+    plen = add_pseudoheader(header, plen, limit, EDNS0_OPTION_NOMDEVICEID, (unsigned char *)encode, strlen(encode), 0, replace);
 
   return plen;
 }
@@ -315,7 +319,7 @@ static size_t add_mac(struct dns_header *header, size_t plen, unsigned char *lim
     replace = 2;
   
   if (replace != 0 || maclen != 0)
-    plen = add_pseudoheader(header, plen, limit, PACKETSZ, EDNS0_OPTION_MAC, mac, maclen, 0, replace);
+    plen = add_pseudoheader(header, plen, limit, EDNS0_OPTION_MAC, mac, maclen, 0, replace);
 
   return plen; 
 }
@@ -413,21 +417,34 @@ static size_t add_source_addr(struct dns_header *header, size_t plen, unsigned c
   else if (option_bool(OPT_STRIP_ECS))
     replace = 2;
   else
-    return plen;
-
-  return add_pseudoheader(header, plen, (unsigned char *)limit, PACKETSZ, EDNS0_OPTION_CLIENT_SUBNET, (unsigned char *)&opt, len, 0, replace);
+    {
+      unsigned char *pheader;
+      /* If we still think the data is cacheable, and we're not
+	 messing with EDNS client subnet ourselves, see if the client
+	 sent a client subnet. If so, mark the data as uncacheable */
+      if (*cacheable &&
+	  (pheader = find_pseudoheader(header, plen, NULL, NULL, NULL, NULL)) &&
+	  !check_source(header, plen, pheader, NULL))
+	*cacheable = 0;
+      
+      return plen;
+    }
+  
+  return add_pseudoheader(header, plen, (unsigned char *)limit, EDNS0_OPTION_CLIENT_SUBNET, (unsigned char *)&opt, len, 0, replace);
 }
 
 int check_source(struct dns_header *header, size_t plen, unsigned char *pseudoheader, union mysockaddr *peer)
 {
-  /* Section 9.2, Check that subnet option in reply matches. */
+  /* Section 9.2, Check that subnet option (if any) in reply matches.
+     if peer == NULL, this degrades to a check for the existence of and EDNS0 client-subnet option. */
   
   int len, calc_len;
   struct subnet_opt opt;
   unsigned char *p;
   int code, i, rdlen;
   
-  calc_len = calc_subnet_opt(&opt, peer, NULL);
+  if (peer)
+    calc_len = calc_subnet_opt(&opt, peer, NULL);
    
   if (!(p = skip_name(pseudoheader, header, plen, 10)))
     return 1;
@@ -439,21 +456,26 @@ int check_source(struct dns_header *header, size_t plen, unsigned char *pseudohe
     return 1; /* bad packet */
   
   /* check if option there */
-   for (i = 0; i + 4 < rdlen; i += len + 4)
+  for (i = 0; i + 4 < rdlen; i += len + 4)
      {
        GETSHORT(code, p);
        GETSHORT(len, p);
        if (code == EDNS0_OPTION_CLIENT_SUBNET)
 	 {
-	   /* make sure this doesn't mismatch. */
-	   opt.scope_netmask = p[3];
-	   if (len != calc_len || memcmp(p, &opt, len) != 0)
+	   if (peer)
+	     {
+	       /* make sure this doesn't mismatch. */
+	       opt.scope_netmask = p[3];
+	       if (len != calc_len || memcmp(p, &opt, len) != 0)
+		 return 0;
+	     }
+	   else if (((struct subnet_opt *)p)->source_netmask != 0)
 	     return 0;
 	 }
        p += len;
      }
-   
-   return 1;
+  
+  return 1;
 }
 
 /* See https://docs.umbrella.com/umbrella-api/docs/identifying-dns-traffic for
@@ -487,7 +509,7 @@ static size_t add_umbrella_opt(struct dns_header *header, size_t plen, unsigned
 {
   *cacheable = 0;
 
-  struct umbrella_opt opt = {{"ODNS"}, UMBRELLA_VERSION, 0, {}};
+  struct umbrella_opt opt = {{"ODNS"}, UMBRELLA_VERSION, 0, {0}};
   u8 *u = &opt.fields[0];
   int family = source->sa.sa_family;
   int size = family == AF_INET ? INADDRSZ : IN6ADDRSZ;
@@ -515,7 +537,7 @@ static size_t add_umbrella_opt(struct dns_header *header, size_t plen, unsigned
       PUTLONG(daemon->umbrella_asset, u);
     }
   
-  return add_pseudoheader(header, plen, (unsigned char *)limit, PACKETSZ, EDNS0_OPTION_UMBRELLA, (unsigned char *)&opt, u - (u8 *)&opt, 0, 1);
+  return add_pseudoheader(header, plen, (unsigned char *)limit, EDNS0_OPTION_UMBRELLA, (unsigned char *)&opt, u - (u8 *)&opt, 0, 1);
 }
 
 /* Set *check_subnet if we add a client subnet option, which needs to checked 
@@ -530,13 +552,13 @@ size_t add_edns0_config(struct dns_header *header, size_t plen, unsigned char *l
   plen = add_dns_client(header, plen, limit, source, now, cacheable);
   
   if (daemon->dns_client_id)
-    plen = add_pseudoheader(header, plen, limit, PACKETSZ, EDNS0_OPTION_NOMCPEID, 
+    plen = add_pseudoheader(header, plen, limit, EDNS0_OPTION_NOMCPEID, 
 			    (unsigned char *)daemon->dns_client_id, strlen(daemon->dns_client_id), 0, 1);
 
   if (option_bool(OPT_UMBRELLA))
     plen = add_umbrella_opt(header, plen, limit, source, cacheable);
   
   plen = add_source_addr(header, plen, limit, source, cacheable);
-  	  
+
   return plen;
 }

src/hash-questions.c

@@ -1,284 +0,0 @@
-/* Copyright (c) 2012-2023 Simon Kelley
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; version 2 dated June, 1991, or
-   (at your option) version 3 dated 29 June, 2007.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-
-/* Hash the question section. This is used to safely detect query 
-   retransmission and to detect answers to questions we didn't ask, which 
-   might be poisoning attacks. Note that we decode the name rather 
-   than CRC the raw bytes, since replies might be compressed differently. 
-   We ignore case in the names for the same reason. 
-
-   The hash used is SHA-256. If we're building with DNSSEC support,
-   we use the Nettle cypto library. If not, we prefer not to
-   add a dependency on Nettle, and use a stand-alone implementation. 
-*/
-
-#include "dnsmasq.h"
-
-#if defined(HAVE_DNSSEC) || defined(HAVE_CRYPTOHASH)
-
-static const struct nettle_hash *hash;
-static void *ctx;
-static unsigned char *digest;
-
-void hash_questions_init(void)
-{
-  if (!(hash = hash_find("sha256")))
-    die(_("Failed to create SHA-256 hash object"), NULL, EC_MISC);
-
-  ctx = safe_malloc(hash->context_size);
-  digest = safe_malloc(hash->digest_size);
-}
-
-unsigned char *hash_questions(struct dns_header *header, size_t plen, char *name)
-{
-  int q;
-  unsigned char *p = (unsigned char *)(header+1);
-
-  hash->init(ctx);
-
-  for (q = ntohs(header->qdcount); q != 0; q--) 
-    {
-      char *cp, c;
-
-      if (!extract_name(header, plen, &p, name, 1, 4))
-	return NULL; /* bad packet */
-
-      for (cp = name; (c = *cp); cp++)
-	 if (c >= 'A' && c <= 'Z')
-	   *cp += 'a' - 'A';
-
-      hash->update(ctx, cp - name, (unsigned char *)name);
-      /* CRC the class and type as well */
-      hash->update(ctx, 4, p);
-
-      p += 4;
-      if (!CHECK_LEN(header, p, plen, 0))
-	return NULL; /* bad packet */
-    }
-  
-  hash->digest(ctx, hash->digest_size, digest);
-  return digest;
-}
-
-#else /* HAVE_DNSSEC  || HAVE_CRYPTOHASH */
-
-#define SHA256_BLOCK_SIZE 32            /* SHA256 outputs a 32 byte digest */
-typedef unsigned char BYTE;             /* 8-bit byte */
-typedef unsigned int  WORD;             /* 32-bit word, change to "long" for 16-bit machines */
-
-typedef struct {
-  BYTE data[64];
-  WORD datalen;
-  unsigned long long bitlen;
-  WORD state[8];
-} SHA256_CTX;
-
-static void sha256_init(SHA256_CTX *ctx);
-static void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len);
-static void sha256_final(SHA256_CTX *ctx, BYTE hash[]);
-
-void hash_questions_init(void)
-{
-}
-
-unsigned char *hash_questions(struct dns_header *header, size_t plen, char *name)
-{
-  int q;
-  unsigned char *p = (unsigned char *)(header+1);
-  SHA256_CTX ctx;
-  static BYTE digest[SHA256_BLOCK_SIZE];
-  
-  sha256_init(&ctx);
-    
-  for (q = ntohs(header->qdcount); q != 0; q--) 
-    {
-      char *cp, c;
-
-      if (!extract_name(header, plen, &p, name, 1, 4))
-	return NULL; /* bad packet */
-
-      for (cp = name; (c = *cp); cp++)
-	 if (c >= 'A' && c <= 'Z')
-	   *cp += 'a' - 'A';
-
-      sha256_update(&ctx, (BYTE *)name, cp - name);
-      /* CRC the class and type as well */
-      sha256_update(&ctx, (BYTE *)p, 4);
-
-      p += 4;
-      if (!CHECK_LEN(header, p, plen, 0))
-	return NULL; /* bad packet */
-    }
-  
-  sha256_final(&ctx, digest);
-  return (unsigned char *)digest;
-}
-
-/* Code from here onwards comes from https://github.com/B-Con/crypto-algorithms
-   and was written by Brad Conte (brad@bradconte.com), to whom all credit is given.
-
-   This code is in the public domain, and the copyright notice at the head of this 
-   file does not apply to it.
-*/
-
-
-/****************************** MACROS ******************************/
-#define ROTLEFT(a,b) (((a) << (b)) | ((a) >> (32-(b))))
-#define ROTRIGHT(a,b) (((a) >> (b)) | ((a) << (32-(b))))
-
-#define CH(x,y,z) (((x) & (y)) ^ (~(x) & (z)))
-#define MAJ(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
-#define EP0(x) (ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22))
-#define EP1(x) (ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25))
-#define SIG0(x) (ROTRIGHT(x,7) ^ ROTRIGHT(x,18) ^ ((x) >> 3))
-#define SIG1(x) (ROTRIGHT(x,17) ^ ROTRIGHT(x,19) ^ ((x) >> 10))
-
-/**************************** VARIABLES *****************************/
-static const WORD k[64] = {
-			   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5,0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5,
-			   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3,0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174,
-			   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc,0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da,
-			   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7,0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967,
-			   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13,0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85,
-			   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3,0xd192e819,0xd6990624,0xf40e3585,0x106aa070,
-			   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5,0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3,
-			   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208,0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
-};
-
-/*********************** FUNCTION DEFINITIONS ***********************/
-static void sha256_transform(SHA256_CTX *ctx, const BYTE data[])
-{
-  WORD a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
-  
-  for (i = 0, j = 0; i < 16; ++i, j += 4)
-    m[i] = (((WORD)data[j]) << 24) | (((WORD)data[j + 1]) << 16) | (((WORD)data[j + 2]) << 8) | (((WORD)data[j + 3]));
-  for ( ; i < 64; ++i)
-    m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
-
-  a = ctx->state[0];
-  b = ctx->state[1];
-  c = ctx->state[2];
-  d = ctx->state[3];
-  e = ctx->state[4];
-  f = ctx->state[5];
-  g = ctx->state[6];
-  h = ctx->state[7];
-
-  for (i = 0; i < 64; ++i)
-    {
-      t1 = h + EP1(e) + CH(e,f,g) + k[i] + m[i];
-      t2 = EP0(a) + MAJ(a,b,c);
-      h = g;
-      g = f;
-      f = e;
-      e = d + t1;
-      d = c;
-      c = b;
-      b = a;
-      a = t1 + t2;
-    }
-  
-  ctx->state[0] += a;
-  ctx->state[1] += b;
-  ctx->state[2] += c;
-  ctx->state[3] += d;
-  ctx->state[4] += e;
-  ctx->state[5] += f;
-  ctx->state[6] += g;
-  ctx->state[7] += h;
-}
-
-static void sha256_init(SHA256_CTX *ctx)
-{
-  ctx->datalen = 0;
-  ctx->bitlen = 0;
-  ctx->state[0] = 0x6a09e667;
-  ctx->state[1] = 0xbb67ae85;
-  ctx->state[2] = 0x3c6ef372;
-  ctx->state[3] = 0xa54ff53a;
-  ctx->state[4] = 0x510e527f;
-  ctx->state[5] = 0x9b05688c;
-  ctx->state[6] = 0x1f83d9ab;
-  ctx->state[7] = 0x5be0cd19;
-}
-
-static void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len)
-{
-  WORD i;
-  
-  for (i = 0; i < len; ++i)
-    {
-      ctx->data[ctx->datalen] = data[i];
-      ctx->datalen++;
-      if (ctx->datalen == 64) {
-	sha256_transform(ctx, ctx->data);
-	ctx->bitlen += 512;
-	ctx->datalen = 0;
-      }
-    }
-}
-
-static void sha256_final(SHA256_CTX *ctx, BYTE hash[])
-{
-  WORD i;
-  
-  i = ctx->datalen;
-
-  /* Pad whatever data is left in the buffer. */
-  if (ctx->datalen < 56)
-    {
-      ctx->data[i++] = 0x80;
-      while (i < 56)
-	ctx->data[i++] = 0x00;
-    }
-  else
-    {
-      ctx->data[i++] = 0x80;
-      while (i < 64)
-	ctx->data[i++] = 0x00;
-      sha256_transform(ctx, ctx->data);
-      memset(ctx->data, 0, 56);
-    }
-  
-  /* Append to the padding the total message's length in bits and transform. */
-  ctx->bitlen += ctx->datalen * 8;
-  ctx->data[63] = ctx->bitlen;
-  ctx->data[62] = ctx->bitlen >> 8;
-  ctx->data[61] = ctx->bitlen >> 16;
-  ctx->data[60] = ctx->bitlen >> 24;
-  ctx->data[59] = ctx->bitlen >> 32;
-  ctx->data[58] = ctx->bitlen >> 40;
-  ctx->data[57] = ctx->bitlen >> 48;
-  ctx->data[56] = ctx->bitlen >> 56;
-  sha256_transform(ctx, ctx->data);
-  
-  /* Since this implementation uses little endian byte ordering and SHA uses big endian,
-     reverse all the bytes when copying the final state to the output hash. */
-  for (i = 0; i < 4; ++i)
-    {
-      hash[i]      = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 4]  = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 8]  = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
-      hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
-    }
-}
-
-#endif

src/helper.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -196,7 +196,7 @@ int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd)
 	}
       
       /* we read zero bytes when pipe closed: this is our signal to exit */ 
-      if (!read_write(pipefd[0], (unsigned char *)&data, sizeof(data), 1))
+      if (!read_write(pipefd[0], (unsigned char *)&data, sizeof(data), RW_READ))
 	{
 #ifdef HAVE_LUASCRIPT
 	  if (daemon->luascript)
@@ -258,7 +258,7 @@ int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd)
 	continue;
       
       if (!read_write(pipefd[0], buf, 
-		      data.hostname_len + data.ed_len + data.clid_len, 1))
+		      data.hostname_len + data.ed_len + data.clid_len, RW_READ))
 	continue;
 
       /* CLID into packet */

src/inotify.c

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
  
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -94,7 +94,7 @@ void inotify_dnsmasq_init()
   if (daemon->inotifyfd == -1)
     die(_("failed to create inotify: %s"), NULL, EC_MISC);
 
-  if (option_bool(OPT_NO_RESOLV))
+  if (daemon->port == 0 || option_bool(OPT_NO_RESOLV))
     return;
   
   for (res = daemon->resolv_files; res; res = res->next)

src/ip6addr.h

@@ -1,4 +1,4 @@
-/* dnsmasq is Copyright (c) 2000-2024 Simon Kelley
+/* dnsmasq is Copyright (c) 2000-2025 Simon Kelley
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by

src/ipset.c

@@ -75,11 +75,11 @@ static char *buffer;
 
 static inline void add_attr(struct nlmsghdr *nlh, uint16_t type, size_t len, const void *data)
 {
-  struct my_nlattr *attr = (void *)nlh + NL_ALIGN(nlh->nlmsg_len);
+  struct my_nlattr *attr = (struct my_nlattr *)((u8 *)nlh + NL_ALIGN(nlh->nlmsg_len));
   uint16_t payload_len = NL_ALIGN(sizeof(struct my_nlattr)) + len;
   attr->nla_type = type;
   attr->nla_len = payload_len;
-  memcpy((void *)attr + NL_ALIGN(sizeof(struct my_nlattr)), data, len);
+  memcpy((u8 *)attr + NL_ALIGN(sizeof(struct my_nlattr)), data, len);
   nlh->nlmsg_len += NL_ALIGN(payload_len);
 }
 
@@ -138,8 +138,8 @@ static int new_add_to_ipset(const char *setname, const union all_addr *ipaddr, i
   add_attr(nlh, 
 	   (af == AF_INET ? IPSET_ATTR_IPADDR_IPV4 : IPSET_ATTR_IPADDR_IPV6) | NLA_F_NET_BYTEORDER,
 	   addrsz, ipaddr);
-  nested[1]->nla_len = (void *)buffer + NL_ALIGN(nlh->nlmsg_len) - (void *)nested[1];
-  nested[0]->nla_len = (void *)buffer + NL_ALIGN(nlh->nlmsg_len) - (void *)nested[0];
+  nested[1]->nla_len = (u8 *)buffer + NL_ALIGN(nlh->nlmsg_len) - (u8 *)nested[1];
+  nested[0]->nla_len = (u8 *)buffer + NL_ALIGN(nlh->nlmsg_len) - (u8 *)nested[0];
 	
   while (retry_send(sendto(ipset_sock, buffer, nlh->nlmsg_len, 0,
 			   (struct sockaddr *)&snl, sizeof(snl))));