Bump to dnsmasq 2.77test1 - this includes a number of fixes since 2.76
and allows dropping of 2 LEDE carried patches.
Notable fix in rrfilter code when talking to Nominum's DNS servers
especially with DNSSEC.
A patch to switch dnsmasq back to 'soft fail' for SERVFAIL responses
from dns servers is also included. This mean dnsmasq tries all
configured servers before giving up.
A 'localise queries' enhancement has also been backported (it will
appear in test2/rc'n') this is especially important if using the
recently imported to LEDE 'use dnsmasq standalone' feature 9525743c
I have been following dnsmasq HEAD ever since 2.76 release.
Compile & Run tested: ar71xx, Archer C7 v2
Tested-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
master
Kevin Darbyshire-Bryant
8 years ago
committed by
Jo-Philipp Wich
parent
f9f6a21c81
commit
3bef96ef18
@ -0,0 +1,99 @@ |
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From d42d4706bbcce3b5a40ad778a5a356a997db6b34 Mon Sep 17 00:00:00 2001
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From: Simon Kelley <simon@thekelleys.org.uk>
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Date: Thu, 2 Feb 2017 16:52:06 +0000
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Subject: [PATCH] Make --localise-queries apply to names from
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--interface-name.
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---
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CHANGELOG | 7 +++++++
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man/dnsmasq.8 | 9 +++++----
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src/rfc1035.c | 21 ++++++++++++++++++++-
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3 files changed, 32 insertions(+), 5 deletions(-)
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--- a/CHANGELOG
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+++ b/CHANGELOG
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@@ -58,6 +58,13 @@ version 2.77
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this is Nominum's. Thanks to Dave Täht for spotting the
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bug and assisting in the fix.
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+ Fix the manpage which lied that only the primary address
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+ of an interface is used by --interface-name.
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+
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+ Make --localise-queries apply to names from --interface-name.
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+ Thanks to Kevin Darbyshire-Bryant and Eric Luehrsen
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+ for pushing this.
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+
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version 2.76
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Include 0.0.0.0/8 in DNS rebind checks. This range
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--- a/man/dnsmasq.8
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+++ b/man/dnsmasq.8
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@@ -289,8 +289,8 @@ option requires non-standard networking
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under Linux. On other platforms it falls-back to --bind-interfaces mode.
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.TP
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.B \-y, --localise-queries
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-Return answers to DNS queries from /etc/hosts which depend on the interface over which the query was
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-received. If a name in /etc/hosts has more than one address associated with
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+Return answers to DNS queries from /etc/hosts and --interface-name which depend on the interface over which the query was
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+received. If a name has more than one address associated with
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it, and at least one of those addresses is on the same subnet as the
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interface to which the query was sent, then return only the
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address(es) on that subnet. This allows for a server to have multiple
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@@ -604,7 +604,7 @@ given by the hex data, which may be of t
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012345 or any mixture of these.
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.TP
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.B --interface-name=<name>,<interface>[/4|/6]
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-Return a DNS record associating the name with the primary address on
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+Return DNS records associating the name with the address(es) of
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the given interface. This flag specifies an A or AAAA record for the given
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name in the same way as an /etc/hosts line, except that the address is
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not constant, but taken from the given interface. The interface may be
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@@ -614,7 +614,8 @@ down, not configured or non-existent, an
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matching PTR record is also created, mapping the interface address to
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the name. More than one name may be associated with an interface
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address by repeating the flag; in that case the first instance is used
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-for the reverse address-to-name mapping.
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+for the reverse address-to-name mapping. Note that a name used in
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+--interface-name may not appear in /etc/hosts.
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.TP
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.B --synth-domain=<domain>,<address range>[,<prefix>]
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Create artificial A/AAAA and PTR records for an address range. The
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--- a/src/rfc1035.c
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+++ b/src/rfc1035.c
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@@ -1516,9 +1516,24 @@ size_t answer_request(struct dns_header
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if (intr)
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{
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struct addrlist *addrlist;
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- int gotit = 0;
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+ int gotit = 0, localise = 0;
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enumerate_interfaces(0);
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+
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+ /* See if a putative address is on the network from which we recieved
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+ the query, is so we'll filter other answers. */
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+ if (local_addr.s_addr != 0 && option_bool(OPT_LOCALISE) && type == T_A)
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+ for (intr = daemon->int_names; intr; intr = intr->next)
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+ if (hostname_isequal(name, intr->name))
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+ for (addrlist = intr->addr; addrlist; addrlist = addrlist->next)
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+#ifdef HAVE_IPV6
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+ if (!(addrlist->flags & ADDRLIST_IPV6))
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+#endif
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+ if (is_same_net(*((struct in_addr *)&addrlist->addr), local_addr, local_netmask))
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+ {
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+ localise = 1;
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+ break;
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+ }
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for (intr = daemon->int_names; intr; intr = intr->next)
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if (hostname_isequal(name, intr->name))
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@@ -1528,6 +1543,10 @@ size_t answer_request(struct dns_header
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if (((addrlist->flags & ADDRLIST_IPV6) ? T_AAAA : T_A) == type)
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#endif
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{
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+ if (localise &&
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+ !is_same_net(*((struct in_addr *)&addrlist->addr), local_addr, local_netmask))
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+ continue;
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+
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#ifdef HAVE_IPV6
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if (addrlist->flags & ADDRLIST_REVONLY)
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continue;
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@ -1,47 +0,0 @@ |
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--- a/src/dhcp.c
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+++ b/src/dhcp.c
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@@ -147,7 +147,7 @@ void dhcp_packet(time_t now, int pxe_fd)
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ssize_t sz;
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int iface_index = 0, unicast_dest = 0, is_inform = 0;
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int rcvd_iface_index;
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- struct in_addr iface_addr;
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+ struct in_addr iface_addr, *addrp = NULL;
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struct iface_param parm;
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#ifdef HAVE_LINUX_NETWORK
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struct arpreq arp_req;
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@@ -277,11 +277,9 @@ void dhcp_packet(time_t now, int pxe_fd)
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{
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ifr.ifr_addr.sa_family = AF_INET;
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if (ioctl(daemon->dhcpfd, SIOCGIFADDR, &ifr) != -1 )
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- iface_addr = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
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- else
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{
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- my_syslog(MS_DHCP | LOG_WARNING, _("DHCP packet received on %s which has no address"), ifr.ifr_name);
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- return;
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+ addrp = &iface_addr;
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+ iface_addr = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr;
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}
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for (tmp = daemon->dhcp_except; tmp; tmp = tmp->next)
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@@ -300,7 +298,7 @@ void dhcp_packet(time_t now, int pxe_fd)
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parm.relay_local.s_addr = 0;
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parm.ind = iface_index;
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- if (!iface_check(AF_INET, (struct all_addr *)&iface_addr, ifr.ifr_name, NULL))
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+ if (!iface_check(AF_INET, (struct all_addr *)addrp, ifr.ifr_name, NULL))
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{
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/* If we failed to match the primary address of the interface, see if we've got a --listen-address
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for a secondary */
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@@ -320,6 +318,12 @@ void dhcp_packet(time_t now, int pxe_fd)
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complete_context(match.addr, iface_index, NULL, match.netmask, match.broadcast, &parm);
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}
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+ if (!addrp)
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+ {
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+ my_syslog(MS_DHCP | LOG_WARNING, _("DHCP packet received on %s which has no address"), ifr.ifr_name);
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+ return;
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+ }
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+
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if (!iface_enumerate(AF_INET, &parm, complete_context))
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return;
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@ -1,149 +0,0 @@ |
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From f6bea86c78ba9efbd01da3dd2fb18764ec806290 Mon Sep 17 00:00:00 2001
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From: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
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Date: Wed, 7 Sep 2016 09:35:07 +0100
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Subject: [PATCH] dnsmasq: compile time option NO_ID
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Some consider it good practice to obscure software version numbers to
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clients. Compiling with -DNO_ID removes the *.bind info structure.
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This includes: version, author, copyright, cachesize, cache insertions,
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evictions, misses & hits, auth & servers.
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Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
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---
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src/cache.c | 2 ++
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src/config.h | 5 +++++
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src/dnsmasq.h | 4 ++++
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src/option.c | 8 ++++++--
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src/rfc1035.c | 3 ++-
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5 files changed, 19 insertions(+), 3 deletions(-)
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--- a/src/cache.c
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+++ b/src/cache.c
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@@ -1290,6 +1290,7 @@ void cache_add_dhcp_entry(char *host_nam
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}
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#endif
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+#ifndef NO_ID
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int cache_make_stat(struct txt_record *t)
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{
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static char *buff = NULL;
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@@ -1385,6 +1386,7 @@ int cache_make_stat(struct txt_record *t
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*buff = len;
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return 1;
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}
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+#endif
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/* There can be names in the cache containing control chars, don't
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mess up logging or open security holes. */
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--- a/src/config.h
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+++ b/src/config.h
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@@ -120,6 +120,8 @@ HAVE_LOOP
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HAVE_INOTIFY
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use the Linux inotify facility to efficiently re-read configuration files.
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+NO_ID
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+ Don't report *.bind CHAOS info to clients.
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NO_IPV6
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NO_TFTP
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NO_DHCP
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@@ -434,6 +436,9 @@ static char *compile_opts =
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"no-"
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#endif
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"DNSSEC "
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+#ifdef NO_ID
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+"no-ID "
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+#endif
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#ifndef HAVE_LOOP
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"no-"
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#endif
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--- a/src/dnsmasq.h
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+++ b/src/dnsmasq.h
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@@ -286,6 +286,7 @@ struct naptr {
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struct naptr *next;
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};
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+#ifndef NO_ID
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#define TXT_STAT_CACHESIZE 1
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#define TXT_STAT_INSERTS 2
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#define TXT_STAT_EVICTIONS 3
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@@ -293,6 +294,7 @@ struct naptr {
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#define TXT_STAT_HITS 5
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#define TXT_STAT_AUTH 6
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#define TXT_STAT_SERVERS 7
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+#endif
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struct txt_record {
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char *name;
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@@ -1078,7 +1080,9 @@ void cache_add_dhcp_entry(char *host_nam
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struct in_addr a_record_from_hosts(char *name, time_t now);
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void cache_unhash_dhcp(void);
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void dump_cache(time_t now);
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+#ifndef NO_ID
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int cache_make_stat(struct txt_record *t);
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+#endif
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char *cache_get_name(struct crec *crecp);
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char *cache_get_cname_target(struct crec *crecp);
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struct crec *cache_enumerate(int init);
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--- a/src/option.c
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+++ b/src/option.c
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@@ -657,7 +657,8 @@ static int atoi_check8(char *a, int *res
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return 1;
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}
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#endif
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-
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+
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+#ifndef NO_ID
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static void add_txt(char *name, char *txt, int stat)
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{
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struct txt_record *r = opt_malloc(sizeof(struct txt_record));
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@@ -670,13 +671,14 @@ static void add_txt(char *name, char *tx
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*(r->txt) = len;
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memcpy((r->txt)+1, txt, len);
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}
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-
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+
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r->stat = stat;
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r->name = opt_string_alloc(name);
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r->next = daemon->txt;
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daemon->txt = r;
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r->class = C_CHAOS;
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}
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+#endif
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static void do_usage(void)
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{
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@@ -4515,6 +4517,7 @@ void read_opts(int argc, char **argv, ch
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daemon->soa_expiry = SOA_EXPIRY;
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daemon->max_port = MAX_PORT;
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+#ifndef NO_ID
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add_txt("version.bind", "dnsmasq-" VERSION, 0 );
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add_txt("authors.bind", "Simon Kelley", 0);
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add_txt("copyright.bind", COPYRIGHT, 0);
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@@ -4527,6 +4530,7 @@ void read_opts(int argc, char **argv, ch
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add_txt("auth.bind", NULL, TXT_STAT_AUTH);
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#endif
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add_txt("servers.bind", NULL, TXT_STAT_SERVERS);
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+#endif
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while (1)
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{
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--- a/src/rfc1035.c
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+++ b/src/rfc1035.c
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@@ -1264,6 +1264,7 @@ size_t answer_request(struct dns_header
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unsigned long ttl = daemon->local_ttl;
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int ok = 1;
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log_query(F_CONFIG | F_RRNAME, name, NULL, "<TXT>");
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+#ifndef NO_ID
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/* Dynamically generate stat record */
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if (t->stat != 0)
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{
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@@ -1271,7 +1272,7 @@ size_t answer_request(struct dns_header
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if (!cache_make_stat(t))
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ok = 0;
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}
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-
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+#endif
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if (ok && add_resource_record(header, limit, &trunc, nameoffset, &ansp,
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ttl, NULL,
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T_TXT, t->class, "t", t->len, t->txt))
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@ -0,0 +1,30 @@ |
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From 94a8815892f538b334d640012eebcafc2c7fa284 Mon Sep 17 00:00:00 2001
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From: Martin Wetterwald <martin.wetterwald@corp.ovh.com>
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Date: Thu, 27 Oct 2016 12:17:03 +0200
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Subject: [PATCH] Consider SERVFAIL as a non-successful response
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Treat Servfail as a recoverable error instead of a hard error.
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A misconfigured dns forwarder upstream can return a Servfail faster than
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a correctly configured one.
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In the case of a dnssec misbehaving, it will misbehave on all correctly
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configured upstreams. In the case of a normal DNS query, the original
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behavior of dnsmasq here was more robust.
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---
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src/forward.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/src/forward.c
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+++ b/src/forward.c
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@@ -853,7 +853,8 @@ void reply_query(int fd, int family, tim
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we get a good reply from another server. Kill it when we've
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had replies from all to avoid filling the forwarding table when
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everything is broken */
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- if (forward->forwardall == 0 || --forward->forwardall == 1 || RCODE(header) != REFUSED)
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+ if (forward->forwardall == 0 || --forward->forwardall == 1
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+ || (RCODE(header) != REFUSED && RCODE(header) != SERVFAIL))
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{
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int check_rebind = 0, no_cache_dnssec = 0, cache_secure = 0, bogusanswer = 0;
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Loading…
Reference in new issue