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dnsmasq: backport latest pre2.81 patches

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f52bb5b fix previous commit
18eac67 Fix entries in /etc/hosts disabling static leases.
f8c77ed Fix removal of DHCP_CLIENT_MAC options from DHCPv6 relay replies.
4bf62f6 Tidy cache_blockdata_free()
9c0d445 Fix e7bfd556c079c8b5e7425aed44abc35925b24043 to actually work.
2896e24 Check for not(DS or DNSKEY) in is_outdated_cname_pointer()
a90f09d Fix crash freeing negative SRV cache entries.
5b99eae Cache SRV records.
2daca52 Fix typo in ra-param man page section.
2c59473 File logic bug in cache-marshalling code. Introduced a couple of commits back.
cc921df Remove nested struct/union in cache records and all_addr.
ab194ed Futher address union tidying.
65a01b7 Tidy address-union handling: move class into explicit argument.
bde4647 Tidy all_addr union, merge log and rcode fields.
e7bfd55 Alter DHCP address selection after DECLINE in consec-addr mode. Avoid offering the same address after a recieving a DECLINE message to stop an infinite protocol loop. This has long been done in default address allocation mode: this adds similar behaviour when allocaing addresses consecutively.

The most relevant fix for openwrt is 18eac67 (& my own local f52bb5b
which fixes a missing bracket silly) To quote the patch:

It is possible for a config entry to have one address family specified by a
dhcp-host directive and the other added from /etc/hosts. This is especially
common on OpenWrt because it uses odhcpd for DHCPv6 and IPv6 leases are
imported into dnsmasq via a hosts file.

To handle this case there need to be separate *_HOSTS flags for IPv4 and IPv6.
Otherwise when the hosts file is reloaded it will clear the CONFIG_ADDR(6) flag
which was set by the dhcp-host directive.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
This commit is contained in:
Kevin Darbyshire-Bryant 2018-12-17 16:36:44 +00:00
parent 63a2ed3ba5
commit 7541d30c9c
32 changed files with 4118 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
package/network/services/dnsmasq/Makefile
View File

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=dnsmasq
PKG_VERSION:=2.80
PKG_RELEASE:=5
PKG_RELEASE:=6
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq

2
package/network/services/dnsmasq/patches/0001-Impove-cache-behaviour-for-TCP-connections.patch
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@ -1,7 +1,7 @@
From a799ca0c6314ad73a97bc6c89382d2712a9c0b0e Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 18 Oct 2018 19:35:29 +0100
Subject: [PATCH 01/11] Impove cache behaviour for TCP connections.
Subject: [PATCH 01/30] Impove cache behaviour for TCP connections.
For ease of implementaion, dnsmasq has always forked a new process to
handle each incoming TCP connection. A side-effect of this is that any

2
package/network/services/dnsmasq/patches/0002-Ensure-that-AD-bit-is-reset-on-answers-from-address-.patch
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@ -1,7 +1,7 @@
From a220545c4277cba534be5ef4638b5076fc7d2cf4 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Mon, 22 Oct 2018 18:21:48 +0100
Subject: [PATCH 02/11] Ensure that AD bit is reset on answers from
Subject: [PATCH 02/30] Ensure that AD bit is reset on answers from
--address=/<domain>/<address>.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

2
package/network/services/dnsmasq/patches/0003-Remove-ability-to-compile-without-IPv6-support.patch
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@ -1,7 +1,7 @@
From ee8750451b49d27b180517a4e35b636be0fae575 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Tue, 23 Oct 2018 22:10:17 +0100
Subject: [PATCH 03/11] Remove ability to compile without IPv6 support.
Subject: [PATCH 03/30] Remove ability to compile without IPv6 support.
This was the source of a large number of #ifdefs, originally
included for use with old embedded libc versions. I'm

2
package/network/services/dnsmasq/patches/0004-Don-t-forward-.bind-.server-queries-upstream.patch
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@ -1,7 +1,7 @@
From cf5984367bc6a949e3803a576512c5a7bc48ebab Mon Sep 17 00:00:00 2001
From: Vladislav Grishenko <themiron@mail.ru>
Date: Thu, 18 Oct 2018 04:55:21 +0500
Subject: [PATCH 04/11] Don't forward *.bind/*.server queries upstream
Subject: [PATCH 04/30] Don't forward *.bind/*.server queries upstream
Chaos .bind and .server (RFC4892) zones are local, therefore
don't forward queries upstream to avoid mixing with supported

2
package/network/services/dnsmasq/patches/0005-Fix-logging-in-cf5984367bc6a949e3803a576512c5a7bc48e.patch
View File

@ -1,7 +1,7 @@
From cbb5b17ad8e03e08ade62376a4f6a2066e55960d Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Tue, 23 Oct 2018 23:45:57 +0100
Subject: [PATCH 05/11] Fix logging in cf5984367bc6a949e3803a576512c5a7bc48ebab
Subject: [PATCH 05/30] Fix logging in cf5984367bc6a949e3803a576512c5a7bc48ebab
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---

2
package/network/services/dnsmasq/patches/0006-Fix-spurious-AD-flags-in-some-DNS-replies-from-local.patch
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@ -1,7 +1,7 @@
From 6f7812d97bc8f87004c0a5069c6c94c64af78106 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Tue, 23 Oct 2018 23:54:44 +0100
Subject: [PATCH 06/11] Fix spurious AD flags in some DNS replies from local
Subject: [PATCH 06/30] Fix spurious AD flags in some DNS replies from local
config.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

2
package/network/services/dnsmasq/patches/0007-Do-not-rely-on-dead-code-elimination-use-array-inste.patch
View File

@ -1,7 +1,7 @@
From 24b87607c1353e94689e8a2190571ab3f3b36f31 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Wed, 24 Oct 2018 22:30:18 +0100
Subject: [PATCH 07/11] Do not rely on dead code elimination, use array
Subject: [PATCH 07/30] Do not rely on dead code elimination, use array
instead. Make options bits derived from size and count. Use size of option
bits and last supported bit in computation. No new change would be required
when new options are added. Just change OPT_LAST constant.

2
package/network/services/dnsmasq/patches/0008-Fix-Makefile-lines-generating-UBUS-linker-config.patch
View File

@ -1,7 +1,7 @@
From 3a5a84cdd1488bad118eeac72d09a60299bca744 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Wed, 31 Oct 2018 21:30:13 +0000
Subject: [PATCH 08/11] Fix Makefile lines generating UBUS linker config.
Subject: [PATCH 08/30] Fix Makefile lines generating UBUS linker config.
If arg2 of pkg-wrapper is "--copy", then arg1 is NOT the name of
the package manager (--copy doesn't invoke it) it's a secondary

2
package/network/services/dnsmasq/patches/0009-Revert-68f6312d4bae30b78daafcd6f51dc441b8685b1e.patch
View File

@ -1,7 +1,7 @@
From 122392e0b352507cabb9e982208d35d2e56902e0 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Wed, 31 Oct 2018 22:24:02 +0000
Subject: [PATCH 09/11] Revert 68f6312d4bae30b78daafcd6f51dc441b8685b1e
Subject: [PATCH 09/30] Revert 68f6312d4bae30b78daafcd6f51dc441b8685b1e
The above is intended to increase robustness, but actually does the
opposite. The problem is that by ignoring SERVFAIL messages and hoping

2
package/network/services/dnsmasq/patches/0010-Remove-the-NO_FORK-compile-time-option-and-support-f.patch
View File

@ -1,7 +1,7 @@
From 48d12f14c9c0fc8cf943b52774c3892517dd72d4 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 2 Nov 2018 21:55:04 +0000
Subject: [PATCH 10/11] Remove the NO_FORK compile-time option, and support for
Subject: [PATCH 10/30] Remove the NO_FORK compile-time option, and support for
uclinux.
In an era where everything has an MMU, this looks like

2
package/network/services/dnsmasq/patches/0011-Free-config-file-values-on-parsing-errors.patch
View File

@ -1,7 +1,7 @@
From 59e470381f84f2fdf0640c7bc67827f3f0c64784 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Fri, 2 Nov 2018 22:39:39 +0000
Subject: [PATCH 11/11] Free config file values on parsing errors.
Subject: [PATCH 11/30] Free config file values on parsing errors.
This time I have a little bit more controversal patches. But I think
still useful. They fixes memory leaks that might occur in some cases.

32
package/network/services/dnsmasq/patches/0013-Treat-DS-and-DNSKEY-queries-being-forwarded-the-same.patch Normal file
View File

@ -0,0 +1,32 @@
From 07e25da5bf26d46aad4f1d2eb19b260789182004 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Sun, 16 Dec 2018 18:21:58 +0000
Subject: [PATCH 13/30] Treat DS and DNSKEY queries being forwarded the same as
those locally originated.
The queries will not be forwarded to a server for a domain, unless
there's a trust anchor provided for that domain. This allows, especially,
suitable proof of non-existance for DS records to come from
the parent domain for domains which are not signed.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/rfc1035.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -916,6 +916,13 @@ unsigned int extract_request(struct dns_
if (qtype == T_ANY)
return F_IPV4 | F_IPV6;
}
+
+ /* F_DNSSECOK as agument to search_servers() inhibits forwarding
+ to servers for domains without a trust anchor. This make the
+ behaviour for DS and DNSKEY queries we forward the same
+ as for DS and DNSKEY queries we originate. */
+ if (qtype == T_DS || qtype == T_DNSKEY)
+ return F_DNSSECOK;
return F_QUERY;
}

21
package/network/services/dnsmasq/patches/0013-ipset-fix-ternary-order-swap.patch
View File

@ -1,21 +0,0 @@
From 46de5d4954b470db155098001cffc357b51e50f4 Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Date: Wed, 12 Dec 2018 11:35:12 +0000
Subject: [PATCH] ipset fix ternary order swap
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/ipset.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/src/ipset.c
+++ b/src/ipset.c
@@ -120,7 +120,7 @@ static int new_add_to_ipset(const char *
struct my_nfgenmsg *nfg;
struct my_nlattr *nested[2];
uint8_t proto;
- int addrsz = (af == AF_INET6) ? INADDRSZ : IN6ADDRSZ;
+ int addrsz = (af == AF_INET6) ? IN6ADDRSZ : INADDRSZ;
if (strlen(setname) >= IPSET_MAXNAMELEN)
{

18
package/network/services/dnsmasq/patches/0014-option-dhcp-boot-dhcp-reply-delay-tag-fixes.patch → package/network/services/dnsmasq/patches/0014-Fix-option-parsing-errors-introduced-in-59e470381f84.patch
View File

@ -1,17 +1,19 @@
From 668b45c29c38d440c8fce4bc994c56910adc3919 Mon Sep 17 00:00:00 2001
From 137e9f878fafb38369eab7d9dfe84e4228ff5f89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Fri, 14 Dec 2018 17:03:08 +0100
Subject: [PATCH] Fix required tags in few places
Date: Sun, 16 Dec 2018 21:25:29 +0000
Subject: [PATCH 14/30] Fix option parsing errors introduced in
59e470381f84f2fdf0640c7bc67827f3f0c64784
Some locations were incorrectly changed to require always tags, else
dnsmasq will not start. Fix dhcp-boot, dhcp-reply-delay and pxe-prompt.
Thanks to Kevin Darbyshire-Bryant for spotting this.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/option.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/src/option.c
+++ b/src/option.c
@@ -3434,7 +3434,7 @@ static int one_opt(int option, char *arg
@@ -3432,7 +3432,7 @@ static int one_opt(int option, char *arg
{
struct dhcp_netid *id = dhcp_tags(&arg);
@ -20,7 +22,7 @@ dnsmasq will not start. Fix dhcp-boot, dhcp-reply-delay and pxe-prompt.
{
ret_err(gen_err);
}
@@ -3485,7 +3485,7 @@ static int one_opt(int option, char *arg
@@ -3483,7 +3483,7 @@ static int one_opt(int option, char *arg
{
struct dhcp_netid *id = dhcp_tags(&arg);
@ -29,7 +31,7 @@ dnsmasq will not start. Fix dhcp-boot, dhcp-reply-delay and pxe-prompt.
{
ret_err(gen_err);
}
@@ -3515,7 +3515,7 @@ static int one_opt(int option, char *arg
@@ -3513,7 +3513,7 @@ static int one_opt(int option, char *arg
new->opt = 10; /* PXE_MENU_PROMPT */
new->netid = dhcp_tags(&arg);

45
package/network/services/dnsmasq/patches/0015-fix-ipv6-ipset-bug-in-master.patch Normal file
View File

@ -0,0 +1,45 @@
From 3becf468bad699bfdcb2d18d553bc72d4c79e23c Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Date: Wed, 12 Dec 2018 12:00:19 +0000
Subject: [PATCH 15/30] fix ipv6 ipset bug in master
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Hi Simon,
Another one fallen out of the openwrt tree shake :-)
ipv6 ipset addresses weren’t being set correctly. patch attached
Cheers,
Kevin D-B
012C ACB2 28C6 C53E 9775 9123 B3A2 389B 9DE2 334A
From b50fc0491e374186f982b019f293379955afd203 Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Date: Wed, 12 Dec 2018 11:35:12 +0000
Subject: [PATCH] ipset fix ternary order swap
ee87504 Remove ability to compile without IPv6 support introduced a
ternary operator for ip address size. Unfortunately the true/false
order was incorrect which meant ipv6 ipset addresses were added
incorrectly.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/ipset.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/src/ipset.c
+++ b/src/ipset.c
@@ -120,7 +120,7 @@ static int new_add_to_ipset(const char *
struct my_nfgenmsg *nfg;
struct my_nlattr *nested[2];
uint8_t proto;
- int addrsz = (af == AF_INET6) ? INADDRSZ : IN6ADDRSZ;
+ int addrsz = (af == AF_INET6) ? IN6ADDRSZ : INADDRSZ;
if (strlen(setname) >= IPSET_MAXNAMELEN)
{

23
package/network/services/dnsmasq/patches/0012-option-fix-non-DHCPv6-build-error.patch → package/network/services/dnsmasq/patches/0016-build-failure-on-master-with-NO_DHCPv6-and-fix.patch
View File

@ -1,3 +1,26 @@
From b683cf37f9f3dd3dc5d95d621ee75850d559b2e4 Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
Date: Mon, 10 Dec 2018 10:34:35 +0000
Subject: [PATCH 16/30] build failure on master with NO_DHCPv6 and fix....
Hi Simon,
master has a build error when building without HAVE_DHCPv6
option.c: In function 'dhcp_context_free':
option.c:1042:15: error: 'struct dhcp_context' has no member named 'template_interface'
free(ctx->template_interface);
Sadly, need to put in a little conditional compilation ifdef'erey
Simplest patch in the world attached
Cheers,
Kevin D-B
012C ACB2 28C6 C53E 9775 9123 B3A2 389B 9DE2 334A
From 061eb8599636bb360e0b7fa5986935b86db39497 Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Date: Mon, 10 Dec 2018 10:07:33 +0000

57
package/network/services/dnsmasq/patches/0017-Alter-DHCP-address-selection-after-DECLINE-in-consec.patch Normal file
View File

@ -0,0 +1,57 @@
From e7bfd556c079c8b5e7425aed44abc35925b24043 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Mon, 31 Dec 2018 20:51:15 +0000
Subject: [PATCH 17/30] Alter DHCP address selection after DECLINE in
consec-addr mode. Avoid offering the same address after a recieving a DECLINE
message to stop an infinite protocol loop. This has long been done in default
address allocation mode: this adds similar behaviour when allocaing addresses
consecutively.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dhcp.c | 13 +++++++++++++
src/dhcp6.c | 11 +++++++++--
2 files changed, 22 insertions(+), 2 deletions(-)
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -754,6 +754,19 @@ int address_allocate(struct dhcp_context
if (addr.s_addr == d->router.s_addr)
break;
+ /* in consec-ip mode, skip addresses equal to
+ the number of addresses rejected by clients. This
+ should avoid the same client being offered the same
+ address after it has rjected it. */
+ if (option_bool(OPT_CONSEC_ADDR))
+ {
+ if (c->addr_epoch)
+ {
+ c->addr_epoch--;
+ d = context; /* d non-NULL skips the address. */
+ }
+ }
+
/* Addresses which end in .255 and .0 are broken in Windows even when using
supernetting. ie dhcp-range=192.168.0.1,192.168.1.254,255,255,254.0
then 192.168.0.255 is a valid IP address, but not for Windows as it's
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -431,8 +431,15 @@ struct dhcp_context *address6_allocate(s
else
{
if (!temp_addr && option_bool(OPT_CONSEC_ADDR))
- /* seed is largest extant lease addr in this context */
- start = lease_find_max_addr6(c) + serial;
+ {
+ /* seed is largest extant lease addr in this context,
+ skip addresses equal to the number of addresses rejected
+ by clients. This should avoid the same client being offered the same
+ address after it has rjected it. */
+ start = lease_find_max_addr6(c) + serial + c->addr_epoch;
+ if (c->addr_epoch)
+ c->addr_epoch--;
+ }
else
{
u64 range = 1 + addr6part(&c->end6) - addr6part(&c->start6);

80
package/network/services/dnsmasq/patches/0018-Tidy-all_addr-union-merge-log-and-rcode-fields.patch Normal file
View File

@ -0,0 +1,80 @@
From bde46476ee06c96e821653dfdb8fa11fe7326998 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Mon, 31 Dec 2018 23:28:24 +0000
Subject: [PATCH 18/30] Tidy all_addr union, merge log and rcode fields.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 2 +-
src/dnsmasq.h | 6 +-----
src/forward.c | 2 +-
src/rfc1035.c | 6 +++---
4 files changed, 6 insertions(+), 10 deletions(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -1926,7 +1926,7 @@ void log_query(unsigned int flags, char
sprintf(daemon->addrbuff, arg, addr->addr.log.keytag, addr->addr.log.algo, addr->addr.log.digest);
else if (flags & F_RCODE)
{
- unsigned int rcode = addr->addr.rcode.rcode;
+ unsigned int rcode = addr->addr.log.rcode;
if (rcode == SERVFAIL)
dest = "SERVFAIL";
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -279,12 +279,8 @@ struct all_addr {
struct in6_addr addr6;
/* for log_query */
struct {
- unsigned short keytag, algo, digest;
+ unsigned short keytag, algo, digest, rcode;
} log;
- /* for log_query */
- struct {
- unsigned int rcode;
- } rcode;
/* for cache_insert of DNSKEY, DS */
struct {
unsigned short class, type;
--- a/src/forward.c
+++ b/src/forward.c
@@ -658,7 +658,7 @@ static size_t process_reply(struct dns_h
if (rcode != NOERROR && rcode != NXDOMAIN)
{
struct all_addr a;
- a.addr.rcode.rcode = rcode;
+ a.addr.log.rcode = rcode;
log_query(F_UPSTREAM | F_RCODE, "error", &a, NULL);
return resize_packet(header, n, pheader, plen);
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -950,7 +950,7 @@ size_t setup_reply(struct dns_header *he
else if (flags == F_SERVFAIL)
{
struct all_addr a;
- a.addr.rcode.rcode = SERVFAIL;
+ a.addr.log.rcode = SERVFAIL;
log_query(F_CONFIG | F_RCODE, "error", &a, NULL);
SET_RCODE(header, SERVFAIL);
}
@@ -975,7 +975,7 @@ size_t setup_reply(struct dns_header *he
else /* nowhere to forward to */
{
struct all_addr a;
- a.addr.rcode.rcode = REFUSED;
+ a.addr.log.rcode = REFUSED;
log_query(F_CONFIG | F_RCODE, "error", &a, NULL);
SET_RCODE(header, REFUSED);
}
@@ -1374,7 +1374,7 @@ size_t answer_request(struct dns_header
notimp = 1, auth = 0;
if (!dryrun)
{
- addr.addr.rcode.rcode = NOTIMP;
+ addr.addr.log.rcode = NOTIMP;
log_query(F_CONFIG | F_RCODE, name, &addr, NULL);
}
ans = 1, sec_data = 0;

290
package/network/services/dnsmasq/patches/0019-Tidy-address-union-handling-move-class-into-explicit.patch Normal file
View File

@ -0,0 +1,290 @@
From 65a01b71bb433c9466e4c78a73a8d8ed218ed4e8 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Mon, 31 Dec 2018 23:56:33 +0000
Subject: [PATCH 19/30] Tidy address-union handling: move class into explicit
argument.
This moves the class argument to cache-insert into an argument,
rather then overloading a union in the address argument. Note that
tha class is NOT stored in the cache other than for DS/DNSKEY entries,
so must always be C_IN except for these. The data-extraction code
ensures this as it only attempts to cache C_IN class records.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 57 ++++++++++++++++++++++-----------------------------
src/dnsmasq.h | 2 +-
src/dnssec.c | 13 +++---------
src/rfc1035.c | 12 +++++------
4 files changed, 34 insertions(+), 50 deletions(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -26,7 +26,7 @@ static union bigname *big_free = NULL;
static int bignames_left, hash_size;
static void make_non_terminals(struct crec *source);
-static struct crec *really_insert(char *name, struct all_addr *addr,
+static struct crec *really_insert(char *name, struct all_addr *addr, unsigned short class,
time_t now, unsigned long ttl, unsigned short flags);
/* type->string mapping: this is also used by the name-hash function as a mixing table. */
@@ -330,8 +330,8 @@ static int is_expired(time_t now, struct
return 1;
}
-static struct crec *cache_scan_free(char *name, struct all_addr *addr, time_t now, unsigned short flags,
- struct crec **target_crec, unsigned int *target_uid)
+static struct crec *cache_scan_free(char *name, struct all_addr *addr, unsigned short class, time_t now,
+ unsigned short flags, struct crec **target_crec, unsigned int *target_uid)
{
/* Scan and remove old entries.
If (flags & F_FORWARD) then remove any forward entries for name and any expired
@@ -350,6 +350,8 @@ static struct crec *cache_scan_free(char
This entry will get re-used with the same name, to preserve CNAMEs. */
struct crec *crecp, **up;
+
+ (void)class;
if (flags & F_FORWARD)
{
@@ -381,7 +383,7 @@ static struct crec *cache_scan_free(char
#ifdef HAVE_DNSSEC
/* Deletion has to be class-sensitive for DS and DNSKEY */
- if ((flags & crecp->flags & (F_DNSKEY | F_DS)) && crecp->uid == addr->addr.dnssec.class)
+ if ((flags & crecp->flags & (F_DNSKEY | F_DS)) && crecp->uid == class)
{
if (crecp->flags & F_CONFIG)
return crecp;
@@ -464,7 +466,7 @@ void cache_start_insert(void)
insert_error = 0;
}
-struct crec *cache_insert(char *name, struct all_addr *addr,
+struct crec *cache_insert(char *name, struct all_addr *addr, unsigned short class,
time_t now, unsigned long ttl, unsigned short flags)
{
/* Don't log DNSSEC records here, done elsewhere */
@@ -478,11 +480,11 @@ struct crec *cache_insert(char *name, st
ttl = daemon->min_cache_ttl;
}
- return really_insert(name, addr, now, ttl, flags);
+ return really_insert(name, addr, class, now, ttl, flags);
}
-static struct crec *really_insert(char *name, struct all_addr *addr,
+static struct crec *really_insert(char *name, struct all_addr *addr, unsigned short class,
time_t now, unsigned long ttl, unsigned short flags)
{
struct crec *new, *target_crec = NULL;
@@ -497,7 +499,7 @@ static struct crec *really_insert(char *
/* First remove any expired entries and entries for the name/address we
are currently inserting. */
- if ((new = cache_scan_free(name, addr, now, flags, &target_crec, &target_uid)))
+ if ((new = cache_scan_free(name, addr, class, now, flags, &target_crec, &target_uid)))
{
/* We're trying to insert a record over one from
/etc/hosts or DHCP, or other config. If the
@@ -553,21 +555,14 @@ static struct crec *really_insert(char *
if (freed_all)
{
- struct all_addr free_addr = new->addr.addr;;
-
-#ifdef HAVE_DNSSEC
- /* For DNSSEC records, addr holds class. */
- if (new->flags & (F_DS | F_DNSKEY))
- free_addr.addr.dnssec.class = new->uid;
-#endif
-
+ /* For DNSSEC records, uid holds class. */
free_avail = 1; /* Must be free space now. */
- cache_scan_free(cache_get_name(new), &free_addr, now, new->flags, NULL, NULL);
+ cache_scan_free(cache_get_name(new), &new->addr.addr, new->uid, now, new->flags, NULL, NULL);
daemon->metrics[METRIC_DNS_CACHE_LIVE_FREED]++;
}
else
{
- cache_scan_free(NULL, NULL, now, 0, NULL, NULL);
+ cache_scan_free(NULL, NULL, class, now, 0, NULL, NULL);
freed_all = 1;
}
}
@@ -615,15 +610,13 @@ static struct crec *really_insert(char *
else
*cache_get_name(new) = 0;
- if (addr)
- {
#ifdef HAVE_DNSSEC
- if (flags & (F_DS | F_DNSKEY))
- new->uid = addr->addr.dnssec.class;
- else
+ if (flags & (F_DS | F_DNSKEY))
+ new->uid = class;
#endif
- new->addr.addr = *addr;
- }
+
+ if (addr)
+ new->addr.addr = *addr;
new->ttd = now + (time_t)ttl;
new->next = new_chain;
@@ -747,11 +740,11 @@ int cache_recv_insert(time_t now, int fd
{
if (!read_write(fd, (unsigned char *)&addr, sizeof(addr), 1))
return 0;
- crecp = really_insert(daemon->namebuff, &addr, now, ttl, flags);
+ crecp = really_insert(daemon->namebuff, &addr, C_IN, now, ttl, flags);
}
else if (flags & F_CNAME)
{
- struct crec *newc = really_insert(daemon->namebuff, NULL, now, ttl, flags);
+ struct crec *newc = really_insert(daemon->namebuff, NULL, C_IN, now, ttl, flags);
/* This relies on the fact the the target of a CNAME immediately preceeds
it because of the order of extraction in extract_addresses, and
the order reversal on the new_chain. */
@@ -780,10 +773,8 @@ int cache_recv_insert(time_t now, int fd
if (!read_write(fd, (unsigned char *)&class, sizeof(class), 1))
return 0;
- /* Cache needs to known class for DNSSEC stuff */
- addr.addr.dnssec.class = class;
-
- crecp = really_insert(daemon->namebuff, &addr, now, ttl, flags);
+
+ crecp = really_insert(daemon->namebuff, NULL, class, now, ttl, flags);
if (flags & F_DNSKEY)
{
@@ -1463,7 +1454,7 @@ void cache_add_dhcp_entry(char *host_nam
}
else if (!(crec->flags & F_DHCP))
{
- cache_scan_free(host_name, NULL, 0, crec->flags & (flags | F_CNAME | F_FORWARD), NULL, NULL);
+ cache_scan_free(host_name, NULL, C_IN, 0, crec->flags & (flags | F_CNAME | F_FORWARD), NULL, NULL);
/* scan_free deletes all addresses associated with name */
break;
}
@@ -1490,7 +1481,7 @@ void cache_add_dhcp_entry(char *host_nam
if (crec->flags & F_NEG)
{
flags |= F_REVERSE;
- cache_scan_free(NULL, (struct all_addr *)host_address, 0, flags, NULL, NULL);
+ cache_scan_free(NULL, (struct all_addr *)host_address, C_IN, 0, flags, NULL, NULL);
}
}
else
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -1144,7 +1144,7 @@ struct crec *cache_find_by_name(struct c
void cache_end_insert(void);
void cache_start_insert(void);
int cache_recv_insert(time_t now, int fd);
-struct crec *cache_insert(char *name, struct all_addr *addr,
+struct crec *cache_insert(char *name, struct all_addr *addr, unsigned short class,
time_t now, unsigned long ttl, unsigned short flags);
void cache_reload(void);
void cache_add_dhcp_entry(char *host_name, int prot, struct all_addr *host_address, time_t ttd);
--- a/src/dnssec.c
+++ b/src/dnssec.c
@@ -798,12 +798,9 @@ int dnssec_validate_by_ds(time_t now, st
algo = *p++;
keytag = dnskey_keytag(algo, flags, p, rdlen - 4);
- /* Cache needs to known class for DNSSEC stuff */
- a.addr.dnssec.class = class;
-
if ((key = blockdata_alloc((char*)p, rdlen - 4)))
{
- if (!(recp1 = cache_insert(name, &a, now, ttl, F_FORWARD | F_DNSKEY | F_DNSSECOK)))
+ if (!(recp1 = cache_insert(name, &a, class, now, ttl, F_FORWARD | F_DNSKEY | F_DNSSECOK)))
{
blockdata_free(key);
return STAT_BOGUS;
@@ -927,12 +924,9 @@ int dnssec_validate_ds(time_t now, struc
algo = *p++;
digest = *p++;
- /* Cache needs to known class for DNSSEC stuff */
- a.addr.dnssec.class = class;
-
if ((key = blockdata_alloc((char*)p, rdlen - 4)))
{
- if (!(crecp = cache_insert(name, &a, now, ttl, F_FORWARD | F_DS | F_DNSSECOK)))
+ if (!(crecp = cache_insert(name, NULL, class, now, ttl, F_FORWARD | F_DS | F_DNSSECOK)))
{
blockdata_free(key);
return STAT_BOGUS;
@@ -1021,8 +1015,7 @@ int dnssec_validate_ds(time_t now, struc
{
cache_start_insert();
- a.addr.dnssec.class = class;
- if (!cache_insert(name, &a, now, ttl, flags))
+ if (!cache_insert(name, NULL, class, now, ttl, flags))
return STAT_BOGUS;
cache_end_insert();
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -701,7 +701,7 @@ int extract_addresses(struct dns_header
goto cname_loop;
}
- cache_insert(name, &addr, now, cttl, name_encoding | secflag | F_REVERSE);
+ cache_insert(name, &addr, C_IN, now, cttl, name_encoding | secflag | F_REVERSE);
found = 1;
}
@@ -719,7 +719,7 @@ int extract_addresses(struct dns_header
ttl = find_soa(header, qlen, NULL, doctored);
}
if (ttl)
- cache_insert(NULL, &addr, now, ttl, name_encoding | F_REVERSE | F_NEG | flags | (secure ? F_DNSSECOK : 0));
+ cache_insert(NULL, &addr, C_IN, now, ttl, name_encoding | F_REVERSE | F_NEG | flags | (secure ? F_DNSSECOK : 0));
}
}
else
@@ -773,7 +773,7 @@ int extract_addresses(struct dns_header
{
if (!cname_count--)
return 0; /* looped CNAMES */
- newc = cache_insert(name, NULL, now, attl, F_CNAME | F_FORWARD | secflag);
+ newc = cache_insert(name, NULL, C_IN, now, attl, F_CNAME | F_FORWARD | secflag);
if (newc)
{
newc->addr.cname.target.cache = NULL;
@@ -833,7 +833,7 @@ int extract_addresses(struct dns_header
}
#endif
- newc = cache_insert(name, &addr, now, attl, flags | F_FORWARD | secflag);
+ newc = cache_insert(name, &addr, C_IN, now, attl, flags | F_FORWARD | secflag);
if (newc && cpp)
{
next_uid(newc);
@@ -860,7 +860,7 @@ int extract_addresses(struct dns_header
pointing at this, inherit its TTL */
if (ttl || cpp)
{
- newc = cache_insert(name, NULL, now, ttl ? ttl : cttl, F_FORWARD | F_NEG | flags | (secure ? F_DNSSECOK : 0));
+ newc = cache_insert(name, NULL, C_IN, now, ttl ? ttl : cttl, F_FORWARD | F_NEG | flags | (secure ? F_DNSSECOK : 0));
if (newc && cpp)
{
next_uid(newc);
@@ -1054,7 +1054,7 @@ int check_for_bogus_wildcard(struct dns_
/* Found a bogus address. Insert that info here, since there no SOA record
to get the ttl from in the normal processing */
cache_start_insert();
- cache_insert(name, NULL, now, ttl, F_IPV4 | F_FORWARD | F_NEG | F_NXDOMAIN);
+ cache_insert(name, NULL, C_IN, now, ttl, F_IPV4 | F_FORWARD | F_NEG | F_NXDOMAIN);
cache_end_insert();
return 1;

363
package/network/services/dnsmasq/patches/0020-Futher-address-union-tidying.patch Normal file
View File

@ -0,0 +1,363 @@
From ab194ed7ca433e4e2e8b2ec338bfa4e6aa886a4b Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Tue, 1 Jan 2019 01:35:30 +0000
Subject: [PATCH 20/30] Futher address union tidying.
Pass DNSKEY and DS data into cache_insert via the address argument,
now these data types are included in struct all_addr.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 116 ++++++++++++++++----------------------------------
src/dnsmasq.h | 26 +++++------
src/dnssec.c | 53 +++++++++++------------
3 files changed, 73 insertions(+), 122 deletions(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -202,9 +202,9 @@ static void cache_hash(struct crec *crec
static void cache_blockdata_free(struct crec *crecp)
{
if (crecp->flags & F_DNSKEY)
- blockdata_free(crecp->addr.key.keydata);
+ blockdata_free(crecp->addr.addr.addr.key.keydata);
else if ((crecp->flags & F_DS) && !(crecp->flags & F_NEG))
- blockdata_free(crecp->addr.ds.keydata);
+ blockdata_free(crecp->addr.addr.addr.ds.keydata);
}
#endif
@@ -659,33 +659,22 @@ void cache_end_insert(void)
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))
+ if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS))
read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr, sizeof(new_chain->addr), 0);
#ifdef HAVE_DNSSEC
- else if (flags & F_DNSKEY)
+ if (flags & F_DNSKEY)
{
read_write(daemon->pipe_to_parent, (unsigned char *)&class, sizeof(class), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.key.algo, sizeof(new_chain->addr.key.algo), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.key.keytag, sizeof(new_chain->addr.key.keytag), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.key.flags, sizeof(new_chain->addr.key.flags), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.key.keylen, sizeof(new_chain->addr.key.keylen), 0);
- blockdata_write(new_chain->addr.key.keydata, new_chain->addr.key.keylen, daemon->pipe_to_parent);
+ blockdata_write(new_chain->addr.addr.addr.key.keydata, new_chain->addr.addr.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))
- {
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.ds.algo, sizeof(new_chain->addr.ds.algo), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.ds.keytag, sizeof(new_chain->addr.ds.keytag), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.ds.digest, sizeof(new_chain->addr.ds.digest), 0);
- read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr.ds.keylen, sizeof(new_chain->addr.ds.keylen), 0);
- blockdata_write(new_chain->addr.ds.keydata, new_chain->addr.ds.keylen, daemon->pipe_to_parent);
- }
+ blockdata_write(new_chain->addr.addr.addr.ds.keydata, new_chain->addr.addr.addr.ds.keylen, daemon->pipe_to_parent);
}
#endif
-
}
}
@@ -736,11 +725,30 @@ int cache_recv_insert(time_t now, int fd
ttl = difftime(ttd, now);
- if (flags & (F_IPV4 | F_IPV6))
+ if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS))
{
+ unsigned short class = C_IN;
+
if (!read_write(fd, (unsigned char *)&addr, sizeof(addr), 1))
return 0;
- crecp = really_insert(daemon->namebuff, &addr, C_IN, now, ttl, flags);
+
+#ifdef HAVE_DNSSEC
+ if (flags & F_DNSKEY)
+ {
+ if (!read_write(fd, (unsigned char *)&class, sizeof(class), 1) ||
+ !(addr.addr.key.keydata = blockdata_read(fd, addr.addr.key.keylen)))
+ return 0;
+ }
+ else if (flags & F_DS)
+ {
+ if (!read_write(fd, (unsigned char *)&class, sizeof(class), 1) ||
+ (flags & F_NEG) ||
+ !(addr.addr.key.keydata = blockdata_read(fd, addr.addr.key.keylen)))
+ return 0;
+ }
+#endif
+
+ crecp = really_insert(daemon->namebuff, &addr, class, now, ttl, flags);
}
else if (flags & F_CNAME)
{
@@ -764,58 +772,6 @@ int cache_recv_insert(time_t now, int fd
}
}
}
-#ifdef HAVE_DNSSEC
- else if (flags & (F_DNSKEY | F_DS))
- {
- unsigned short class, keylen, keyflags, keytag;
- unsigned char algo, digest;
- struct blockdata *keydata;
-
- if (!read_write(fd, (unsigned char *)&class, sizeof(class), 1))
- return 0;
-
- crecp = really_insert(daemon->namebuff, NULL, class, now, ttl, flags);
-
- if (flags & F_DNSKEY)
- {
- if (!read_write(fd, (unsigned char *)&algo, sizeof(algo), 1) ||
- !read_write(fd, (unsigned char *)&keytag, sizeof(keytag), 1) ||
- !read_write(fd, (unsigned char *)&keyflags, sizeof(keyflags), 1) ||
- !read_write(fd, (unsigned char *)&keylen, sizeof(keylen), 1) ||
- !(keydata = blockdata_read(fd, keylen)))
- return 0;
- }
- else if (!(flags & F_NEG))
- {
- if (!read_write(fd, (unsigned char *)&algo, sizeof(algo), 1) ||
- !read_write(fd, (unsigned char *)&keytag, sizeof(keytag), 1) ||
- !read_write(fd, (unsigned char *)&digest, sizeof(digest), 1) ||
- !read_write(fd, (unsigned char *)&keylen, sizeof(keylen), 1) ||
- !(keydata = blockdata_read(fd, keylen)))
- return 0;
- }
-
- if (crecp)
- {
- if (flags & F_DNSKEY)
- {
- crecp->addr.key.algo = algo;
- crecp->addr.key.keytag = keytag;
- crecp->addr.key.flags = flags;
- crecp->addr.key.keylen = keylen;
- crecp->addr.key.keydata = keydata;
- }
- else if (!(flags & F_NEG))
- {
- crecp->addr.ds.algo = algo;
- crecp->addr.ds.keytag = keytag;
- crecp->addr.ds.digest = digest;
- crecp->addr.ds.keylen = keylen;
- crecp->addr.ds.keydata = keydata;
- }
- }
- }
-#endif
}
}
@@ -1290,15 +1246,15 @@ void cache_reload(void)
#ifdef HAVE_DNSSEC
for (ds = daemon->ds; ds; ds = ds->next)
if ((cache = whine_malloc(SIZEOF_POINTER_CREC)) &&
- (cache->addr.ds.keydata = blockdata_alloc(ds->digest, ds->digestlen)))
+ (cache->addr.addr.addr.ds.keydata = blockdata_alloc(ds->digest, ds->digestlen)))
{
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->addr.addr.addr.ds.keylen = ds->digestlen;
+ cache->addr.addr.addr.ds.algo = ds->algo;
+ cache->addr.addr.addr.ds.keytag = ds->keytag;
+ cache->addr.addr.addr.ds.digest = ds->digest_type;
cache->uid = ds->class;
cache_hash(cache);
make_non_terminals(cache);
@@ -1775,12 +1731,12 @@ void dump_cache(time_t now)
else if (cache->flags & F_DS)
{
if (!(cache->flags & F_NEG))
- sprintf(a, "%5u %3u %3u", cache->addr.ds.keytag,
- cache->addr.ds.algo, cache->addr.ds.digest);
+ sprintf(a, "%5u %3u %3u", cache->addr.addr.addr.ds.keytag,
+ cache->addr.addr.addr.ds.algo, cache->addr.addr.addr.ds.digest);
}
else if (cache->flags & F_DNSKEY)
- sprintf(a, "%5u %3u %3u", cache->addr.key.keytag,
- cache->addr.key.algo, cache->addr.key.flags);
+ sprintf(a, "%5u %3u %3u", cache->addr.addr.addr.key.keytag,
+ cache->addr.addr.addr.key.algo, cache->addr.addr.addr.key.flags);
#endif
else if (!(cache->flags & F_NEG) || !(cache->flags & F_FORWARD))
{
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -277,14 +277,21 @@ struct all_addr {
union {
struct in_addr addr4;
struct in6_addr addr6;
+ struct {
+ struct blockdata *keydata;
+ unsigned short keylen, flags, keytag;
+ unsigned char algo;
+ } key;
+ struct {
+ struct blockdata *keydata;
+ unsigned short keylen, keytag;
+ unsigned char algo;
+ unsigned char digest;
+ } ds;
/* for log_query */
struct {
unsigned short keytag, algo, digest, rcode;
} log;
- /* for cache_insert of DNSKEY, DS */
- struct {
- unsigned short class, type;
- } dnssec;
} addr;
};
@@ -414,17 +421,6 @@ struct crec {
} target;
unsigned int uid; /* 0 if union is interface-name */
} cname;
- struct {
- struct blockdata *keydata;
- unsigned short keylen, flags, keytag;
- unsigned char algo;
- } key;
- struct {
- struct blockdata *keydata;
- unsigned short keylen, keytag;
- unsigned char algo;
- unsigned char digest;
- } ds;
} addr;
time_t ttd; /* time to die */
/* used as class if DNSKEY/DS, index to source for F_HOSTS */
--- a/src/dnssec.c
+++ b/src/dnssec.c
@@ -628,10 +628,10 @@ static int validate_rrset(time_t now, st
{
/* iterate through all possible keys 4035 5.3.1 */
for (; crecp; crecp = cache_find_by_name(crecp, keyname, now, F_DNSKEY))
- if (crecp->addr.key.algo == algo &&
- crecp->addr.key.keytag == key_tag &&
+ if (crecp->addr.addr.addr.key.algo == algo &&
+ crecp->addr.addr.addr.key.keytag == key_tag &&
crecp->uid == (unsigned int)class &&
- verify(crecp->addr.key.keydata, crecp->addr.key.keylen, sig, sig_len, digest, hash->digest_size, algo))
+ verify(crecp->addr.addr.addr.key.keydata, crecp->addr.addr.addr.key.keylen, sig, sig_len, digest, hash->digest_size, algo))
return (labels < name_labels) ? STAT_SECURE_WILDCARD : STAT_SECURE;
}
}
@@ -728,10 +728,10 @@ int dnssec_validate_by_ds(time_t now, st
const struct nettle_hash *hash;
int sigcnt, rrcnt;
- if (recp1->addr.ds.algo == algo &&
- recp1->addr.ds.keytag == keytag &&
+ if (recp1->addr.addr.addr.ds.algo == algo &&
+ recp1->addr.addr.addr.ds.keytag == keytag &&
recp1->uid == (unsigned int)class &&
- (hash = hash_find(ds_digest_name(recp1->addr.ds.digest))) &&
+ (hash = hash_find(ds_digest_name(recp1->addr.addr.addr.ds.digest))) &&
hash_init(hash, &ctx, &digest))
{
@@ -746,9 +746,9 @@ int dnssec_validate_by_ds(time_t now, st
from_wire(name);
if (!(recp1->flags & F_NEG) &&
- recp1->addr.ds.keylen == (int)hash->digest_size &&
- (ds_digest = blockdata_retrieve(recp1->addr.key.keydata, recp1->addr.ds.keylen, NULL)) &&
- memcmp(ds_digest, digest, recp1->addr.ds.keylen) == 0 &&
+ recp1->addr.addr.addr.ds.keylen == (int)hash->digest_size &&
+ (ds_digest = blockdata_retrieve(recp1->addr.addr.addr.ds.keydata, recp1->addr.addr.addr.ds.keylen, NULL)) &&
+ memcmp(ds_digest, digest, recp1->addr.addr.addr.ds.keylen) == 0 &&
explore_rrset(header, plen, class, T_DNSKEY, name, keyname, &sigcnt, &rrcnt) &&
sigcnt != 0 && rrcnt != 0 &&
validate_rrset(now, header, plen, class, T_DNSKEY, sigcnt, rrcnt, name, keyname,
@@ -800,7 +800,13 @@ int dnssec_validate_by_ds(time_t now, st
if ((key = blockdata_alloc((char*)p, rdlen - 4)))
{
- if (!(recp1 = cache_insert(name, &a, class, now, ttl, F_FORWARD | F_DNSKEY | F_DNSSECOK)))
+ a.addr.key.keylen = rdlen - 4;
+ a.addr.key.keydata = key;
+ a.addr.key.algo = algo;
+ a.addr.key.keytag = keytag;
+ a.addr.key.flags = flags;
+
+ if (!cache_insert(name, &a, class, now, ttl, F_FORWARD | F_DNSKEY | F_DNSSECOK))
{
blockdata_free(key);
return STAT_BOGUS;
@@ -813,12 +819,6 @@ int dnssec_validate_by_ds(time_t now, st
log_query(F_NOEXTRA | F_KEYTAG | F_UPSTREAM, name, &a, "DNSKEY keytag %hu, algo %hu");
else
log_query(F_NOEXTRA | F_KEYTAG | F_UPSTREAM, name, &a, "DNSKEY keytag %hu, algo %hu (not supported)");
-
- recp1->addr.key.keylen = rdlen - 4;
- recp1->addr.key.keydata = key;
- recp1->addr.key.algo = algo;
- recp1->addr.key.keytag = keytag;
- recp1->addr.key.flags = flags;
}
}
}
@@ -915,8 +915,7 @@ int dnssec_validate_ds(time_t now, struc
int algo, digest, keytag;
unsigned char *psave = p;
struct blockdata *key;
- struct crec *crecp;
-
+
if (rdlen < 4)
return STAT_BOGUS; /* bad packet */
@@ -926,7 +925,13 @@ int dnssec_validate_ds(time_t now, struc
if ((key = blockdata_alloc((char*)p, rdlen - 4)))
{
- if (!(crecp = cache_insert(name, NULL, class, now, ttl, F_FORWARD | F_DS | F_DNSSECOK)))
+ a.addr.ds.digest = digest;
+ a.addr.ds.keydata = key;
+ a.addr.ds.algo = algo;
+ a.addr.ds.keytag = keytag;
+ a.addr.ds.keylen = rdlen - 4;
+
+ if (!cache_insert(name, &a, class, now, ttl, F_FORWARD | F_DS | F_DNSSECOK))
{
blockdata_free(key);
return STAT_BOGUS;
@@ -940,12 +945,6 @@ int dnssec_validate_ds(time_t now, struc
log_query(F_NOEXTRA | F_KEYTAG | F_UPSTREAM, name, &a, "DS keytag %hu, algo %hu, digest %hu");
else
log_query(F_NOEXTRA | F_KEYTAG | F_UPSTREAM, name, &a, "DS keytag %hu, algo %hu, digest %hu (not supported)");
-
- crecp->addr.ds.digest = digest;
- crecp->addr.ds.keydata = key;
- crecp->addr.ds.algo = algo;
- crecp->addr.ds.keytag = keytag;
- crecp->addr.ds.keylen = rdlen - 4;
}
}
@@ -1711,8 +1710,8 @@ static int zone_status(char *name, int c
do
{
if (crecp->uid == (unsigned int)class &&
- ds_digest_name(crecp->addr.ds.digest) &&
- algo_digest_name(crecp->addr.ds.algo))
+ ds_digest_name(crecp->addr.addr.addr.ds.digest) &&
+ algo_digest_name(crecp->addr.addr.addr.ds.algo))
break;
}
while ((crecp = cache_find_by_name(crecp, keyname, now, F_DS)));

2316
package/network/services/dnsmasq/patches/0021-Remove-nested-struct-union-in-cache-records-and-all_.patch Normal file
View File

File diff suppressed because it is too large Load Diff

23
package/network/services/dnsmasq/patches/0022-File-logic-bug-in-cache-marshalling-code.-Introduced.patch Normal file
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@ -0,0 +1,23 @@
From 2c594732eb7391e7cfa817598e33e61cab71131f Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 3 Jan 2019 13:42:03 +0000
Subject: [PATCH 22/30] File logic bug in cache-marshalling code. Introduced a
couple of commits back.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -742,8 +742,7 @@ int cache_recv_insert(time_t now, int fd
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)))
+ (!(flags & F_NEG) && !(addr.key.keydata = blockdata_read(fd, addr.key.keylen))))
return 0;
}
#endif

33
package/network/services/dnsmasq/patches/0023-Fix-typo-in-ra-param-man-page-section.patch Normal file
View File

@ -0,0 +1,33 @@
From 2daca52b80afdc92e7c976629a2bf8182335a626 Mon Sep 17 00:00:00 2001
From: Christian Weiske <cweiske@cweiske.de>
Date: Thu, 3 Jan 2019 20:10:14 +0000
Subject: [PATCH 23/30] Fix typo in ra-param man page section.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
man/dnsmasq.8 | 2 +-
man/fr/dnsmasq.8 | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/man/dnsmasq.8
+++ b/man/dnsmasq.8
@@ -1829,7 +1829,7 @@ The interval between router advertisemen
.B --ra-param=eth0,60.
The lifetime of the route may be changed or set to zero, which allows
a router to advertise prefixes but not a route via itself.
-.B --ra-parm=eth0,0,0
+.B --ra-param=eth0,0,0
(A value of zero for the interval means the default value.) All four parameters may be set at once.
.B --ra-param=eth0,mtu:1280,low,60,1200
--- a/man/fr/dnsmasq.8
+++ b/man/fr/dnsmasq.8
@@ -1774,7 +1774,7 @@ Un intervalle (en secondes) entre les an
.B --ra-param=eth0,60.
La durée de vie de la route peut être changée ou mise à zéro, auquel cas
le routeur peut annoncer les préfixes mais pas de route :
-.B --ra-parm=eth0,0,0
+.B --ra-param=eth0,0,0
(une valeur de zéro pour l'intervalle signifie qu'il garde la valeur par défaut).
Ces quatre paramètres peuvent être configurés en une fois :
.B --ra-param=eth0,mtu:1280,low,60,1200

523
package/network/services/dnsmasq/patches/0024-Cache-SRV-records.patch Normal file
View File

@ -0,0 +1,523 @@
From 5b99eae59d59a8e34a7e512059b98bbd803312f2 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Sun, 6 Jan 2019 23:09:50 +0000
Subject: [PATCH 24/30] Cache SRV records.
Inpsired by a patch from Jeremy Allison, but completely re-rolled
by srk. All bugs are mine.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/auth.c | 2 +-
src/blockdata.c | 12 ++---
src/cache.c | 64 ++++++++++++++--------
src/dnsmasq.c | 2 -
src/dnsmasq.h | 11 ++--
src/rfc1035.c | 141 ++++++++++++++++++++++++++++++++++++++----------
6 files changed, 166 insertions(+), 66 deletions(-)
--- a/src/auth.c
+++ b/src/auth.c
@@ -129,7 +129,7 @@ size_t answer_auth(struct dns_header *he
for (q = ntohs(header->qdcount); q != 0; q--)
{
- unsigned short flag = 0;
+ unsigned int flag = 0;
int found = 0;
int cname_wildcard = 0;
--- a/src/blockdata.c
+++ b/src/blockdata.c
@@ -16,8 +16,6 @@
#include "dnsmasq.h"
-#ifdef HAVE_DNSSEC
-
static struct blockdata *keyblock_free;
static unsigned int blockdata_count, blockdata_hwm, blockdata_alloced;
@@ -54,11 +52,10 @@ void blockdata_init(void)
void blockdata_report(void)
{
- if (option_bool(OPT_DNSSEC_VALID))
- my_syslog(LOG_INFO, _("DNSSEC memory in use %u, max %u, allocated %u"),
- blockdata_count * sizeof(struct blockdata),
- blockdata_hwm * sizeof(struct blockdata),
- blockdata_alloced * sizeof(struct blockdata));
+ my_syslog(LOG_INFO, _("pool memory in use %u, max %u, allocated %u"),
+ blockdata_count * sizeof(struct blockdata),
+ blockdata_hwm * sizeof(struct blockdata),
+ blockdata_alloced * sizeof(struct blockdata));
}
static struct blockdata *blockdata_alloc_real(int fd, char *data, size_t len)
@@ -178,4 +175,3 @@ struct blockdata *blockdata_read(int fd,
return blockdata_alloc_real(fd, NULL, len);
}
-#endif
--- a/src/cache.c
+++ b/src/cache.c
@@ -27,7 +27,7 @@ static int bignames_left, hash_size;
static void make_non_terminals(struct crec *source);
static struct crec *really_insert(char *name, union all_addr *addr, unsigned short class,
- time_t now, unsigned long ttl, unsigned short flags);
+ time_t now, unsigned long ttl, unsigned int flags);
/* type->string mapping: this is also used by the name-hash function as a mixing table. */
static const struct {
@@ -198,15 +198,17 @@ static void cache_hash(struct crec *crec
*up = crecp;
}
-#ifdef HAVE_DNSSEC
static void cache_blockdata_free(struct crec *crecp)
{
- if (crecp->flags & F_DNSKEY)
+ if (crecp->flags & F_SRV)
+ blockdata_free(crecp->addr.srv.target);
+#ifdef HAVE_DNSSEC
+ else if (crecp->flags & F_DNSKEY)
blockdata_free(crecp->addr.key.keydata);
else if ((crecp->flags & F_DS) && !(crecp->flags & F_NEG))
blockdata_free(crecp->addr.ds.keydata);
-}
#endif
+}
static void cache_free(struct crec *crecp)
{
@@ -230,9 +232,7 @@ static void cache_free(struct crec *crec
crecp->flags &= ~F_BIGNAME;
}
-#ifdef HAVE_DNSSEC
cache_blockdata_free(crecp);
-#endif
}
/* insert a new cache entry at the head of the list (youngest entry) */
@@ -331,7 +331,7 @@ static int is_expired(time_t now, struct
}
static struct crec *cache_scan_free(char *name, union all_addr *addr, unsigned short class, time_t now,
- unsigned short flags, struct crec **target_crec, unsigned int *target_uid)
+ unsigned int flags, struct crec **target_crec, unsigned int *target_uid)
{
/* Scan and remove old entries.
If (flags & F_FORWARD) then remove any forward entries for name and any expired
@@ -360,7 +360,7 @@ static struct crec *cache_scan_free(char
if ((crecp->flags & F_FORWARD) && hostname_isequal(cache_get_name(crecp), name))
{
/* Don't delete DNSSEC in favour of a CNAME, they can co-exist */
- if ((flags & crecp->flags & (F_IPV4 | F_IPV6)) ||
+ if ((flags & crecp->flags & (F_IPV4 | F_IPV6 | F_SRV)) ||
(((crecp->flags | flags) & F_CNAME) && !(crecp->flags & (F_DNSKEY | F_DS))))
{
if (crecp->flags & (F_HOSTS | F_DHCP | F_CONFIG))
@@ -467,10 +467,10 @@ void cache_start_insert(void)
}
struct crec *cache_insert(char *name, union all_addr *addr, unsigned short class,
- time_t now, unsigned long ttl, unsigned short flags)
+ time_t now, unsigned long ttl, unsigned int flags)
{
/* Don't log DNSSEC records here, done elsewhere */
- if (flags & (F_IPV4 | F_IPV6 | F_CNAME))
+ if (flags & (F_IPV4 | F_IPV6 | F_CNAME | F_SRV))
{
log_query(flags | F_UPSTREAM, name, addr, NULL);
/* Don't mess with TTL for DNSSEC records. */
@@ -485,7 +485,7 @@ struct crec *cache_insert(char *name, un
static struct crec *really_insert(char *name, union all_addr *addr, unsigned short class,
- time_t now, unsigned long ttl, unsigned short flags)
+ time_t now, unsigned long ttl, unsigned int flags)
{
struct crec *new, *target_crec = NULL;
union bigname *big_name = NULL;
@@ -649,7 +649,7 @@ void cache_end_insert(void)
{
char *name = cache_get_name(new_chain);
ssize_t m = strlen(name);
- unsigned short flags = new_chain->flags;
+ unsigned int flags = new_chain->flags;
#ifdef HAVE_DNSSEC
u16 class = new_chain->uid;
#endif
@@ -659,8 +659,10 @@ void cache_end_insert(void)
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))
+ if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS | F_SRV))
read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr, sizeof(new_chain->addr), 0);
+ if (flags & F_SRV)
+ blockdata_write(new_chain->addr.srv.target, new_chain->addr.srv.targetlen, daemon->pipe_to_parent);
#ifdef HAVE_DNSSEC
if (flags & F_DNSKEY)
{
@@ -699,7 +701,7 @@ int cache_recv_insert(time_t now, int fd
union all_addr addr;
unsigned long ttl;
time_t ttd;
- unsigned short flags;
+ unsigned int flags;
struct crec *crecp = NULL;
cache_start_insert();
@@ -725,13 +727,16 @@ int cache_recv_insert(time_t now, int fd
ttl = difftime(ttd, now);
- if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS))
+ if (flags & (F_IPV4 | F_IPV6 | F_DNSKEY | F_DS | F_SRV))
{
unsigned short class = C_IN;
if (!read_write(fd, (unsigned char *)&addr, sizeof(addr), 1))
return 0;
-
+
+ if (flags & F_SRV && !(addr.srv.target = blockdata_read(fd, addr.srv.targetlen)))
+ return 0;
+
#ifdef HAVE_DNSSEC
if (flags & F_DNSKEY)
{
@@ -802,7 +807,7 @@ struct crec *cache_find_by_name(struct c
/* first search, look for relevant entries and push to top of list
also free anything which has expired */
struct crec *next, **up, **insert = NULL, **chainp = &ans;
- unsigned short ins_flags = 0;
+ unsigned int ins_flags = 0;
for (up = hash_bucket(name), crecp = *up; crecp; crecp = next)
{
@@ -1086,7 +1091,7 @@ int read_hostsfile(char *filename, unsig
FILE *f = fopen(filename, "r");
char *token = daemon->namebuff, *domain_suffix = NULL;
int addr_count = 0, name_count = cache_size, lineno = 0;
- unsigned short flags = 0;
+ unsigned int flags = 0;
union all_addr addr;
int atnl, addrlen = 0;
@@ -1201,9 +1206,8 @@ void cache_reload(void)
for (i=0; i<hash_size; i++)
for (cache = hash_table[i], up = &hash_table[i]; cache; cache = tmp)
{
-#ifdef HAVE_DNSSEC
cache_blockdata_free(cache);
-#endif
+
tmp = cache->hash_next;
if (cache->flags & (F_HOSTS | F_CONFIG))
{
@@ -1381,7 +1385,7 @@ void cache_add_dhcp_entry(char *host_nam
union all_addr *host_address, time_t ttd)
{
struct crec *crec = NULL, *fail_crec = NULL;
- unsigned short flags = F_IPV4;
+ unsigned int flags = F_IPV4;
int in_hosts = 0;
size_t addrlen = sizeof(struct in_addr);
@@ -1682,9 +1686,8 @@ 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
+
blockdata_report();
-#endif
/* sum counts from different records for same server */
for (serv = daemon->servers; serv; serv = serv->next)
@@ -1726,6 +1729,17 @@ void dump_cache(time_t now)
p += sprintf(p, "%-30.30s ", sanitise(n));
if ((cache->flags & F_CNAME) && !is_outdated_cname_pointer(cache))
a = sanitise(cache_get_cname_target(cache));
+ else if ((cache->flags & F_SRV) && !(cache->flags & F_NEG))
+ {
+ int targetlen = cache->addr.srv.targetlen;
+ ssize_t len = sprintf(a, "%u %u %u ", cache->addr.srv.priority,
+ cache->addr.srv.weight, cache->addr.srv.srvport);
+
+ if (targetlen > (40 - len))
+ targetlen = 40 - len;
+ blockdata_retrieve(cache->addr.srv.target, targetlen, a + len);
+ a[len + targetlen] = 0;
+ }
#ifdef HAVE_DNSSEC
else if (cache->flags & F_DS)
{
@@ -1752,6 +1766,8 @@ void dump_cache(time_t now)
t = "6";
else if (cache->flags & F_CNAME)
t = "C";
+ else if (cache->flags & F_SRV)
+ t = "V";
#ifdef HAVE_DNSSEC
else if (cache->flags & F_DS)
t = "S";
@@ -1913,6 +1929,8 @@ void log_query(unsigned int flags, char
}
else if (flags & F_CNAME)
dest = "<CNAME>";
+ else if (flags & F_SRV)
+ dest = "<SRV>";
else if (flags & F_RRNAME)
dest = arg;
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -366,9 +366,7 @@ int main (int argc, char **argv)
{
cache_init();
-#ifdef HAVE_DNSSEC
blockdata_init();
-#endif
}
#ifdef HAVE_INOTIFY
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -299,6 +299,10 @@ union all_addr {
unsigned char algo;
unsigned char digest;
} ds;
+ struct {
+ struct blockdata *target;
+ unsigned short targetlen, srvport, priority, weight;
+ } srv;
/* for log_query */
struct {
unsigned short keytag, algo, digest, rcode;
@@ -426,7 +430,7 @@ struct crec {
time_t ttd; /* time to die */
/* used as class if DNSKEY/DS, index to source for F_HOSTS */
unsigned int uid;
- unsigned short flags;
+ unsigned int flags;
union {
char sname[SMALLDNAME];
union bigname *bname;
@@ -470,6 +474,7 @@ struct crec {
#define F_NOEXTRA (1u<<27)
#define F_SERVFAIL (1u<<28)
#define F_RCODE (1u<<29)
+#define F_SRV (1u<<30)
#define UID_NONE 0
/* Values of uid in crecs with F_CONFIG bit set. */
@@ -1142,7 +1147,7 @@ void cache_end_insert(void);
void cache_start_insert(void);
int cache_recv_insert(time_t now, int fd);
struct crec *cache_insert(char *name, union all_addr *addr, unsigned short class,
- time_t now, unsigned long ttl, unsigned short flags);
+ time_t now, unsigned long ttl, unsigned int flags);
void cache_reload(void);
void cache_add_dhcp_entry(char *host_name, int prot, union all_addr *host_address, time_t ttd);
struct in_addr a_record_from_hosts(char *name, time_t now);
@@ -1158,7 +1163,6 @@ int read_hostsfile(char *filename, unsig
struct crec **rhash, int hashsz);
/* blockdata.c */
-#ifdef HAVE_DNSSEC
void blockdata_init(void);
void blockdata_report(void);
struct blockdata *blockdata_alloc(char *data, size_t len);
@@ -1166,7 +1170,6 @@ void *blockdata_retrieve(struct blockdat
struct blockdata *blockdata_read(int fd, size_t len);
void blockdata_write(struct blockdata *block, size_t len, int fd);
void blockdata_free(struct blockdata *blocks);
-#endif
/* domain.c */
char *get_domain(struct in_addr addr);
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -726,7 +726,7 @@ int extract_addresses(struct dns_header
{
/* everything other than PTR */
struct crec *newc;
- int addrlen;
+ int addrlen = 0;
if (qtype == T_A)
{
@@ -738,7 +738,9 @@ int extract_addresses(struct dns_header
addrlen = IN6ADDRSZ;
flags |= F_IPV6;
}
- else
+ else if (qtype == T_SRV)
+ flags |= F_SRV;
+ else
continue;
cname_loop1:
@@ -799,39 +801,61 @@ int extract_addresses(struct dns_header
{
found = 1;
- /* copy address into aligned storage */
- if (!CHECK_LEN(header, p1, qlen, addrlen))
- return 0; /* bad packet */
- memcpy(&addr, p1, addrlen);
-
- /* check for returned address in private space */
- if (check_rebind)
+ if (flags & F_SRV)
{
- if ((flags & F_IPV4) &&
- private_net(addr.addr4, !option_bool(OPT_LOCAL_REBIND)))
- return 1;
-
- if ((flags & F_IPV6) &&
- IN6_IS_ADDR_V4MAPPED(&addr.addr6))
+ unsigned char *tmp = namep;
+
+ if (!CHECK_LEN(header, p1, qlen, 6))
+ return 0; /* bad packet */
+ GETSHORT(addr.srv.priority, p1);
+ GETSHORT(addr.srv.weight, p1);
+ GETSHORT(addr.srv.srvport, p1);
+ if (!extract_name(header, qlen, &p1, name, 1, 0))
+ return 0;
+ addr.srv.targetlen = strlen(name) + 1; /* include terminating zero */
+ if (!(addr.srv.target = blockdata_alloc(name, addr.srv.targetlen)))
+ return 0;
+
+ /* we overwrote the original name, so get it back here. */
+ if (!extract_name(header, qlen, &tmp, name, 1, 0))
+ return 0;
+ }
+ else
+ {
+ /* copy address into aligned storage */
+ if (!CHECK_LEN(header, p1, qlen, addrlen))
+ return 0; /* bad packet */
+ memcpy(&addr, p1, addrlen);
+
+ /* check for returned address in private space */
+ if (check_rebind)
{
- struct in_addr v4;
- v4.s_addr = ((const uint32_t *) (&addr.addr6))[3];
- if (private_net(v4, !option_bool(OPT_LOCAL_REBIND)))
+ if ((flags & F_IPV4) &&
+ private_net(addr.addr4, !option_bool(OPT_LOCAL_REBIND)))
return 1;
+
+ if ((flags & F_IPV6) &&
+ IN6_IS_ADDR_V4MAPPED(&addr.addr6))
+ {
+ struct in_addr v4;
+ v4.s_addr = ((const uint32_t *) (&addr.addr6))[3];
+ if (private_net(v4, !option_bool(OPT_LOCAL_REBIND)))
+ return 1;
+ }
}
- }
-
+
#ifdef HAVE_IPSET
- if (ipsets && (flags & (F_IPV4 | F_IPV6)))
- {
- ipsets_cur = ipsets;
- while (*ipsets_cur)
+ if (ipsets && (flags & (F_IPV4 | F_IPV6)))
{
- log_query((flags & (F_IPV4 | F_IPV6)) | F_IPSET, name, &addr, *ipsets_cur);
- add_to_ipset(*ipsets_cur++, &addr, flags, 0);
+ ipsets_cur = ipsets;
+ while (*ipsets_cur)
+ {
+ log_query((flags & (F_IPV4 | F_IPV6)) | F_IPSET, name, &addr, *ipsets_cur);
+ add_to_ipset(*ipsets_cur++, &addr, flags, 0);
+ }
}
- }
#endif
+ }
newc = cache_insert(name, &addr, C_IN, now, attl, flags | F_FORWARD | secflag);
if (newc && cpp)
@@ -1844,7 +1868,68 @@ size_t answer_request(struct dns_header
*up = move;
move->next = NULL;
}
-
+
+ if (!found)
+ {
+ cname_srv_restart:
+ if ((crecp = cache_find_by_name(NULL, name, now, F_CNAME | F_SRV | (dryrun ? F_NO_RR : 0))) &&
+ (!do_bit || (option_bool(OPT_DNSSEC_VALID) && !(crecp->flags & F_DNSSECOK))))
+ {
+ if (!(crecp->flags & F_DNSSECOK))
+ sec_data = 0;
+
+ auth = 0;
+ found = ans = 1;
+
+ do {
+ if (crecp->flags & F_CNAME)
+ {
+ char *cname_target = cache_get_cname_target(crecp);
+
+ if (!dryrun)
+ {
+ log_query(crecp->flags, name, NULL, record_source(crecp->uid));
+ if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
+ crec_ttl(crecp, now), &nameoffset,
+ T_CNAME, C_IN, "d", cname_target))
+ anscount++;
+ }
+
+ strcpy(name, cname_target);
+ goto cname_srv_restart;
+ }
+ else if (crecp->flags & F_NEG)
+ {
+ if (crecp->flags & F_NXDOMAIN)
+ nxdomain = 1;
+ if (!dryrun)
+ log_query(crecp->flags, name, NULL, NULL);
+ }
+ else
+ {
+ unsigned char *p1 = ((unsigned char *)header) + nameoffset;
+
+ if (!dryrun)
+ {
+ log_query(crecp->flags, name, NULL, 0);
+
+ blockdata_retrieve(crecp->addr.srv.target, crecp->addr.srv.targetlen, name);
+ if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
+ crec_ttl(crecp, now), NULL, T_SRV, C_IN, "sssd",
+ crecp->addr.srv.priority, crecp->addr.srv.weight, crecp->addr.srv.srvport,
+ name))
+ anscount++;
+
+
+ /* restore name we overwrote */
+ if (!extract_name(header, qlen, &p1, name, 1, 0))
+ return 0; /* bad packet */
+ }
+ }
+ } while ((crecp = cache_find_by_name(crecp, name, now, F_SRV | F_CNAME)));
+ }
+ }
+
if (!found && option_bool(OPT_FILTER) && (qtype == T_SRV || (qtype == T_ANY && strchr(name, '_'))))
{
ans = 1;

23
package/network/services/dnsmasq/patches/0025-Fix-crash-freeing-negative-SRV-cache-entries.patch Normal file
View File

@ -0,0 +1,23 @@
From a90f09db4cc635941a32b973b57e58c662569625 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Wed, 9 Jan 2019 15:08:16 +0000
Subject: [PATCH 25/30] Fix crash freeing negative SRV cache entries.
Thanks to Daniel for finding this one.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -200,7 +200,7 @@ static void cache_hash(struct crec *crec
static void cache_blockdata_free(struct crec *crecp)
{
- if (crecp->flags & F_SRV)
+ if (crecp->flags & F_SRV && !(crecp->flags & F_NEG))
blockdata_free(crecp->addr.srv.target);
#ifdef HAVE_DNSSEC
else if (crecp->flags & F_DNSKEY)

24
package/network/services/dnsmasq/patches/0026-Check-for-not-DS-or-DNSKEY-in-is_outdated_cname_poin.patch Normal file
View File

@ -0,0 +1,24 @@
From 2896e2485e44c04e73a0b7c9f7cbc9c8515d0800 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Wed, 9 Jan 2019 15:12:34 +0000
Subject: [PATCH 26/30] Check for not(DS or DNSKEY) in
is_outdated_cname_pointer()
Previous check was _for_ IPV4, IPv6 CNAME, and I missed adding SRV.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -312,7 +312,7 @@ static int is_outdated_cname_pointer(str
/* NB. record may be reused as DS or DNSKEY, where uid is
overloaded for something completely different */
if (crecp->addr.cname.target.cache &&
- (crecp->addr.cname.target.cache->flags & (F_IPV4 | F_IPV6 | F_CNAME)) &&
+ !(crecp->addr.cname.target.cache->flags & (F_DNSKEY | F_DS)) &&
crecp->addr.cname.uid == crecp->addr.cname.target.cache->uid)
return 0;

95
package/network/services/dnsmasq/patches/0027-Fix-e7bfd556c079c8b5e7425aed44abc35925b24043-to-actu.patch Normal file
View File

@ -0,0 +1,95 @@
From 9c0d445ef4abffa2b9342ad65e85ef425c1f83bb Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Wed, 9 Jan 2019 17:57:56 +0000
Subject: [PATCH 27/30] Fix e7bfd556c079c8b5e7425aed44abc35925b24043 to
actually work.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dhcp.c | 54 +++++++++++++++++++++++++----------------------------
src/dhcp6.c | 2 +-
2 files changed, 26 insertions(+), 30 deletions(-)
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -754,19 +754,6 @@ int address_allocate(struct dhcp_context
if (addr.s_addr == d->router.s_addr)
break;
- /* in consec-ip mode, skip addresses equal to
- the number of addresses rejected by clients. This
- should avoid the same client being offered the same
- address after it has rjected it. */
- if (option_bool(OPT_CONSEC_ADDR))
- {
- if (c->addr_epoch)
- {
- c->addr_epoch--;
- d = context; /* d non-NULL skips the address. */
- }
- }
-
/* Addresses which end in .255 and .0 are broken in Windows even when using
supernetting. ie dhcp-range=192.168.0.1,192.168.1.254,255,255,254.0
then 192.168.0.255 is a valid IP address, but not for Windows as it's
@@ -778,24 +765,33 @@ int address_allocate(struct dhcp_context
(!IN_CLASSC(ntohl(addr.s_addr)) ||
((ntohl(addr.s_addr) & 0xff) != 0xff && ((ntohl(addr.s_addr) & 0xff) != 0x0))))
{
- struct ping_result *r;
-
- if ((r = do_icmp_ping(now, addr, j, loopback)))
- {
- /* consec-ip mode: we offered this address for another client
- (different hash) recently, don't offer it to this one. */
- if (!option_bool(OPT_CONSEC_ADDR) || r->hash == j)
- {
- *addrp = addr;
- return 1;
- }
- }
+ /* in consec-ip mode, skip addresses equal to
+ the number of addresses rejected by clients. This
+ should avoid the same client being offered the same
+ address after it has rjected it. */
+ if (option_bool(OPT_CONSEC_ADDR) && c->addr_epoch)
+ c->addr_epoch--;
else
{
- /* address in use: perturb address selection so that we are
- less likely to try this address again. */
- if (!option_bool(OPT_CONSEC_ADDR))
- c->addr_epoch++;
+ struct ping_result *r;
+
+ if ((r = do_icmp_ping(now, addr, j, loopback)))
+ {
+ /* consec-ip mode: we offered this address for another client
+ (different hash) recently, don't offer it to this one. */
+ if (!option_bool(OPT_CONSEC_ADDR) || r->hash == j)
+ {
+ *addrp = addr;
+ return 1;
+ }
+ }
+ else
+ {
+ /* address in use: perturb address selection so that we are
+ less likely to try this address again. */
+ if (!option_bool(OPT_CONSEC_ADDR))
+ c->addr_epoch++;
+ }
}
}
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -436,7 +436,7 @@ struct dhcp_context *address6_allocate(s
skip addresses equal to the number of addresses rejected
by clients. This should avoid the same client being offered the same
address after it has rjected it. */
- start = lease_find_max_addr6(c) + serial + c->addr_epoch;
+ start = lease_find_max_addr6(c) + 1 + serial + c->addr_epoch;
if (c->addr_epoch)
c->addr_epoch--;
}

36
package/network/services/dnsmasq/patches/0028-Tidy-cache_blockdata_free.patch Normal file
View File

@ -0,0 +1,36 @@
From 4bf62f616b82fad7a7f91195b0204dd64d79a35c Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 10 Jan 2019 21:54:22 +0000
Subject: [PATCH 28/30] Tidy cache_blockdata_free()
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -200,14 +200,17 @@ static void cache_hash(struct crec *crec
static void cache_blockdata_free(struct crec *crecp)
{
- if (crecp->flags & F_SRV && !(crecp->flags & F_NEG))
- blockdata_free(crecp->addr.srv.target);
+ if (!(crecp->flags & F_NEG))
+ {
+ if (crecp->flags & F_SRV)
+ blockdata_free(crecp->addr.srv.target);
#ifdef HAVE_DNSSEC
- else if (crecp->flags & F_DNSKEY)
- blockdata_free(crecp->addr.key.keydata);
- else if ((crecp->flags & F_DS) && !(crecp->flags & F_NEG))
- blockdata_free(crecp->addr.ds.keydata);
+ else if (crecp->flags & F_DNSKEY)
+ blockdata_free(crecp->addr.key.keydata);
+ else if (crecp->flags & F_DS)
+ blockdata_free(crecp->addr.ds.keydata);
#endif
+ }
}
static void cache_free(struct crec *crecp)

52
package/network/services/dnsmasq/patches/0029-Fix-removal-of-DHCP_CLIENT_MAC-options-from-DHCPv6-r.patch Normal file
View File

@ -0,0 +1,52 @@
From f8c77edbdffb8ada7753ea9fa104f0f6da70cfe3 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 10 Jan 2019 21:58:18 +0000
Subject: [PATCH 29/30] Fix removal of DHCP_CLIENT_MAC options from DHCPv6
relay replies.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/rfc3315.c | 30 +++++++++++++++++-------------
1 file changed, 17 insertions(+), 13 deletions(-)
--- a/src/rfc3315.c
+++ b/src/rfc3315.c
@@ -219,21 +219,25 @@ static int dhcp6_maybe_relay(struct stat
if (opt6_ptr(opt, 0) + opt6_len(opt) > end)
return 0;
- int o = new_opt6(opt6_type(opt));
- if (opt6_type(opt) == OPTION6_RELAY_MSG)
+ /* Don't copy MAC address into reply. */
+ if (opt6_type(opt) != OPTION6_CLIENT_MAC)
{
- struct in6_addr align;
- /* the packet data is unaligned, copy to aligned storage */
- memcpy(&align, inbuff + 2, IN6ADDRSZ);
- state->link_address = &align;
- /* zero is_unicast since that is now known to refer to the
- relayed packet, not the original sent by the client */
- if (!dhcp6_maybe_relay(state, opt6_ptr(opt, 0), opt6_len(opt), client_addr, 0, now))
- return 0;
+ int o = new_opt6(opt6_type(opt));
+ if (opt6_type(opt) == OPTION6_RELAY_MSG)
+ {
+ struct in6_addr align;
+ /* the packet data is unaligned, copy to aligned storage */
+ memcpy(&align, inbuff + 2, IN6ADDRSZ);
+ state->link_address = &align;
+ /* zero is_unicast since that is now known to refer to the
+ relayed packet, not the original sent by the client */
+ if (!dhcp6_maybe_relay(state, opt6_ptr(opt, 0), opt6_len(opt), client_addr, 0, now))
+ return 0;
+ }
+ else
+ put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
+ end_opt6(o);
}
- else if (opt6_type(opt) != OPTION6_CLIENT_MAC)
- put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
- end_opt6(o);
}
return 1;

54
package/network/services/dnsmasq/patches/0030-Fix-entries-in-etc-hosts-disabling-static-leases.patch Normal file
View File

@ -0,0 +1,54 @@
From 18eac67c0a15b673c8d27002c248651b308093e4 Mon Sep 17 00:00:00 2001
From: Steven Siloti <ssiloti@gmail.com>
Date: Sun, 13 Jan 2019 22:56:36 +0000
Subject: [PATCH 30/30] Fix entries in /etc/hosts disabling static leases.
It is possible for a config entry to have one address family specified by a
dhcp-host directive and the other added from /etc/hosts. This is especially
common on OpenWrt because it uses odhcpd for DHCPv6 and IPv6 leases are
imported into dnsmasq via a hosts file.
To handle this case there need to be separate *_HOSTS flags for IPv4 and IPv6.
Otherwise when the hosts file is reloaded it will clear the CONFIG_ADDR(6) flag
which was set by the dhcp-host directive.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dhcp-common.c | 8 ++++++--
src/dnsmasq.h | 1 +
2 files changed, 7 insertions(+), 2 deletions(-)
--- a/src/dhcp-common.c
+++ b/src/dhcp-common.c
@@ -372,7 +372,11 @@ void dhcp_update_configs(struct dhcp_con
for (config = configs; config; config = config->next)
if (config->flags & CONFIG_ADDR_HOSTS)
- config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR6 | CONFIG_ADDR_HOSTS);
+ config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR_HOSTS);
+#ifdef HAVE_DHCP6
+ if (config->flags & CONFIG_ADDR6_HOSTS)
+ config->flags &= ~(CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS);
+#endif
#ifdef HAVE_DHCP6
again:
@@ -421,7 +425,7 @@ void dhcp_update_configs(struct dhcp_con
(!(conf_tmp = config_find_by_address6(configs, &crec->addr.addr6, 128, 0)) || conf_tmp == config))
{
memcpy(&config->addr6, &crec->addr.addr6, IN6ADDRSZ);
- config->flags |= CONFIG_ADDR6 | CONFIG_ADDR_HOSTS;
+ config->flags |= CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS;
continue;
}
#endif
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -789,6 +789,7 @@ struct dhcp_config {
#define CONFIG_BANK 2048 /* from dhcp hosts file */
#define CONFIG_ADDR6 4096
#define CONFIG_WILDCARD 8192
+#define CONFIG_ADDR6_HOSTS 16384 /* address added by from /etc/hosts */
struct dhcp_opt {
int opt, len, flags;

27
package/network/services/dnsmasq/patches/0031-fix-previous-commit.patch Normal file
View File

@ -0,0 +1,27 @@
From f52bb5be437ab33d7cd10f0ff1cdf0bb86857cf7 Mon Sep 17 00:00:00 2001
From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Date: Wed, 16 Jan 2019 09:48:07 +0000
Subject: [PATCH 31/31] fix previous commit
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dhcp-common.c | 2 ++
1 file changed, 2 insertions(+)
--- a/src/dhcp-common.c
+++ b/src/dhcp-common.c
@@ -371,12 +371,14 @@ void dhcp_update_configs(struct dhcp_con
int prot = AF_INET;
for (config = configs; config; config = config->next)
+ {
if (config->flags & CONFIG_ADDR_HOSTS)
config->flags &= ~(CONFIG_ADDR | CONFIG_ADDR_HOSTS);
#ifdef HAVE_DHCP6
if (config->flags & CONFIG_ADDR6_HOSTS)
config->flags &= ~(CONFIG_ADDR6 | CONFIG_ADDR6_HOSTS);
#endif
+ }
#ifdef HAVE_DHCP6
again: