KumiSystems/openwrtv3
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

dnsmasq: bump to 2.80test2

Browse source 
Refresh patches and backport upstream to current HEAD:

1f1873a Log warning on very large cachesize config, instead of truncating it.
0a496f0 Do unsolicited RAs for interfaces which appear after dnsmasq startup.
e27825b Fix logging in previous.
1f60a18 Retry SERVFAIL DNSSEC queries to a different server, if possible.
a0088e8 Handle query retry on REFUSED or SERVFAIL for DNSSEC-generated queries.
34e26e1 Retry query to other servers on receipt of SERVFAIL rcode.
6b17335 Add packet-dump debugging facility.
07ed585 Add logging for DNS error returns from upstream and local configuration.
0669ee7 Fix DHCP broken-ness when --no-ping AND --dhcp-sequential-ip are set.
f84e674 Be persistent with broken-upstream-DNSSEC warnings.

Compile & run tested: ar71xx Archer C7 v2

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
This commit is contained in:
Kevin Darbyshire-Bryant 2018-05-12 15:37:33 +01:00 committed by Hans Dedecker
parent 02225f5763
commit 066c85321e
12 changed files with 1172 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
package/network/services/dnsmasq/Makefile
View file

@ -8,12 +8,12 @@
include $(TOPDIR)/rules.mk include $(TOPDIR)/rules.mk
PKG_NAME:=dnsmasq PKG_NAME:=dnsmasq
PKG_VERSION:=2.79 PKG_VERSION:=2.80test2
PKG_RELEASE:=4 PKG_RELEASE:=1
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq/ PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq/test-releases
PKG_HASH:=78ad74f5ca14fd85a8bac93f764cd9d60b27579e90eabd3687ca7b030e67861f PKG_HASH:=e731666094699afcbad947f89f7f8afbf92e5ddc3c915459d4936159d81116f0
PKG_LICENSE:=GPL-2.0 PKG_LICENSE:=GPL-2.0
PKG_LICENSE_FILES:=COPYING PKG_LICENSE_FILES:=COPYING

26
package/network/services/dnsmasq/patches/0001-Be-persistent-with-broken-upstream-DNSSEC-warnings.patch Normal file
View file

@ -0,0 +1,26 @@
From f84e674d8aa2316fea8d2145a40fcef0441e3856 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 4 May 2018 16:29:57 +0100
Subject: [PATCH 01/10] Be persistent with broken-upstream-DNSSEC warnings.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dnssec.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/src/dnssec.c
+++ b/src/dnssec.c
@@ -876,12 +876,7 @@ int dnssec_validate_ds(time_t now, struc
if (rc == STAT_INSECURE)
{
- static int reported = 0;
- if (!reported)
- {
- reported = 1;
- my_syslog(LOG_WARNING, _("Insecure DS reply received, do upstream DNS servers support DNSSEC?"));
- }
+ my_syslog(LOG_WARNING, _("Insecure DS reply received, do upstream DNS servers support DNSSEC?"));
rc = STAT_BOGUS;
}

35
package/network/services/dnsmasq/patches/0002-Fix-DHCP-broken-ness-when-no-ping-AND-dhcp-sequentia.patch Normal file
View file

@ -0,0 +1,35 @@
From 0669ee7a69a004ce34fed41e50aa575f8e04427b Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 4 May 2018 16:46:24 +0100
Subject: [PATCH 02/10] Fix DHCP broken-ness when --no-ping AND
--dhcp-sequential-ip are set.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
CHANGELOG | 3 ++-
src/dhcp.c | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -14,7 +14,8 @@ version 2.80
when the upstream namesevers do not support DNSSEC, and in this
case no DNSSEC validation at all is occuring.
-
+ Fix DHCP broken-ness when --no-ping AND --dhcp-sequential-ip
+ are set. Thanks to Daniel Miess for help with this.
version 2.79
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -678,7 +678,7 @@ struct ping_result *do_icmp_ping(time_t
if ((count >= max) || option_bool(OPT_NO_PING) || loopback)
{
/* overloaded, or configured not to check, loopback interface, return "not in use" */
- dummy.hash = 0;
+ dummy.hash = hash;
return &dummy;
}
else if (icmp_ping(addr))

184
package/network/services/dnsmasq/patches/0003-Add-logging-for-DNS-error-returns-from-upstream-and-.patch Normal file
View file

@ -0,0 +1,184 @@
From 07ed585c38d8f7c0a18470d2e79cf46ea92ea96a Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 4 May 2018 21:52:22 +0100
Subject: [PATCH 03/10] Add logging for DNS error returns from upstream and
local configuration.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/cache.c | 13 +++++++++++++
src/dnsmasq.h | 7 ++++++-
src/forward.c | 25 +++++++++++++++++++------
src/rfc1035.c | 19 ++++++++++++++-----
4 files changed, 52 insertions(+), 12 deletions(-)
--- a/src/cache.c
+++ b/src/cache.c
@@ -1598,6 +1598,19 @@ void log_query(unsigned int flags, char
{
if (flags & F_KEYTAG)
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;
+
+ if (rcode == SERVFAIL)
+ dest = "SERVFAIL";
+ else if (rcode == REFUSED)
+ dest = "REFUSED";
+ else if (rcode == NOTIMP)
+ dest = "not implemented";
+ else
+ sprintf(daemon->addrbuff, "%u", rcode);
+ }
else
{
#ifdef HAVE_IPV6
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -268,7 +268,11 @@ struct all_addr {
/* for log_query */
struct {
unsigned short keytag, algo, digest;
- } log;
+ } log;
+ /* for log_query */
+ struct {
+ unsigned int rcode;
+ } rcode;
/* for cache_insert of DNSKEY, DS */
struct {
unsigned short class, type;
@@ -459,6 +463,7 @@ struct crec {
#define F_IPSET (1u<<26)
#define F_NOEXTRA (1u<<27)
#define F_SERVFAIL (1u<<28)
+#define F_RCODE (1u<<29)
/* Values of uid in crecs with F_CONFIG bit set. */
#define SRC_INTERFACE 0
--- a/src/forward.c
+++ b/src/forward.c
@@ -563,6 +563,7 @@ static size_t process_reply(struct dns_h
unsigned char *pheader, *sizep;
char **sets = 0;
int munged = 0, is_sign;
+ unsigned int rcode = RCODE(header);
size_t plen;
(void)ad_reqd;
@@ -593,6 +594,9 @@ static size_t process_reply(struct dns_h
if ((pheader = find_pseudoheader(header, n, &plen, &sizep, &is_sign, NULL)))
{
+ /* Get extended RCODE. */
+ rcode |= sizep[2] << 4;
+
if (check_subnet && !check_source(header, plen, pheader, query_source))
{
my_syslog(LOG_WARNING, _("discarding DNS reply: subnet option mismatch"));
@@ -641,11 +645,20 @@ static size_t process_reply(struct dns_h
if (!is_sign && !option_bool(OPT_DNSSEC_PROXY))
header->hb4 &= ~HB4_AD;
- if (OPCODE(header) != QUERY || (RCODE(header) != NOERROR && RCODE(header) != NXDOMAIN))
+ if (OPCODE(header) != QUERY)
return resize_packet(header, n, pheader, plen);
+
+ if (rcode != NOERROR && rcode != NXDOMAIN)
+ {
+ struct all_addr a;
+ a.addr.rcode.rcode = rcode;
+ log_query(F_UPSTREAM | F_RCODE, "error", &a, NULL);
+
+ return resize_packet(header, n, pheader, plen);
+ }
/* Complain loudly if the upstream server is non-recursive. */
- if (!(header->hb4 & HB4_RA) && RCODE(header) == NOERROR &&
+ if (!(header->hb4 & HB4_RA) && rcode == NOERROR &&
server && !(server->flags & SERV_WARNED_RECURSIVE))
{
prettyprint_addr(&server->addr, daemon->namebuff);
@@ -654,7 +667,7 @@ static size_t process_reply(struct dns_h
server->flags |= SERV_WARNED_RECURSIVE;
}
- if (daemon->bogus_addr && RCODE(header) != NXDOMAIN &&
+ if (daemon->bogus_addr && rcode != NXDOMAIN &&
check_for_bogus_wildcard(header, n, daemon->namebuff, daemon->bogus_addr, now))
{
munged = 1;
@@ -666,7 +679,7 @@ static size_t process_reply(struct dns_h
{
int doctored = 0;
- if (RCODE(header) == NXDOMAIN &&
+ if (rcode == NXDOMAIN &&
extract_request(header, n, daemon->namebuff, NULL) &&
check_for_local_domain(daemon->namebuff, now))
{
@@ -1090,7 +1103,7 @@ void reply_query(int fd, int family, tim
if (status == STAT_BOGUS && extract_request(header, n, daemon->namebuff, NULL))
domain = daemon->namebuff;
- log_query(F_KEYTAG | F_SECSTAT, domain, NULL, result);
+ log_query(F_SECSTAT, domain, NULL, result);
}
if (status == STAT_SECURE)
@@ -1948,7 +1961,7 @@ unsigned char *tcp_request(int confd, ti
if (status == STAT_BOGUS && extract_request(header, m, daemon->namebuff, NULL))
domain = daemon->namebuff;
- log_query(F_KEYTAG | F_SECSTAT, domain, NULL, result);
+ log_query(F_SECSTAT, domain, NULL, result);
if (status == STAT_BOGUS)
{
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -926,12 +926,11 @@ unsigned int extract_request(struct dns_
return F_QUERY;
}
-
size_t setup_reply(struct dns_header *header, size_t qlen,
struct all_addr *addrp, unsigned int flags, unsigned long ttl)
{
unsigned char *p;
-
+
if (!(p = skip_questions(header, qlen)))
return 0;
@@ -948,7 +947,12 @@ size_t setup_reply(struct dns_header *he
else if (flags == F_NXDOMAIN)
SET_RCODE(header, NXDOMAIN);
else if (flags == F_SERVFAIL)
- SET_RCODE(header, SERVFAIL);
+ {
+ struct all_addr a;
+ a.addr.rcode.rcode = SERVFAIL;
+ log_query(F_CONFIG | F_RCODE, "error", &a, NULL);
+ SET_RCODE(header, SERVFAIL);
+ }
else if (flags == F_IPV4)
{ /* we know the address */
SET_RCODE(header, NOERROR);
@@ -966,8 +970,13 @@ size_t setup_reply(struct dns_header *he
}
#endif
else /* nowhere to forward to */
- SET_RCODE(header, REFUSED);
-
+ {
+ struct all_addr a;
+ a.addr.rcode.rcode = REFUSED;
+ log_query(F_CONFIG | F_RCODE, "error", &a, NULL);
+ SET_RCODE(header, REFUSED);
+ }
+
return p - (unsigned char *)header;
}

587
package/network/services/dnsmasq/patches/0004-Add-packet-dump-debugging-facility.patch Normal file
View file

@ -0,0 +1,587 @@
From 6b17335209639a56f214d011eaed4ebcde8dd276 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Tue, 8 May 2018 18:32:14 +0100
Subject: [PATCH 04/10] Add packet-dump debugging facility.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
CHANGELOG | 6 ++
Makefile | 2 +-
bld/Android.mk | 3 +-
man/dnsmasq.8 | 7 ++
src/config.h | 16 ++++-
src/dnsmasq.c | 16 ++++-
src/dnsmasq.h | 29 +++++++-
src/dump.c | 210 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/forward.c | 37 ++++++++--
src/option.c | 14 ++++
10 files changed, 329 insertions(+), 11 deletions(-)
create mode 100644 src/dump.c
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -17,6 +17,12 @@ version 2.80
Fix DHCP broken-ness when --no-ping AND --dhcp-sequential-ip
are set. Thanks to Daniel Miess for help with this.
+ Add a facilty to store DNS packets sent/recieved in a
+ pcap-format file for later debugging. The file location
+ is given by the --dumpfile option, and a bitmap controlling
+ which packets should be dumped is given by the --dumpmask
+ option.
+
version 2.79
Fix parsing of CNAME arguments, which are confused by extra spaces.
--- a/Makefile
+++ b/Makefile
@@ -76,7 +76,7 @@ objs = cache.o rfc1035.o util.o option.o
helper.o tftp.o log.o conntrack.o dhcp6.o rfc3315.o \
dhcp-common.o outpacket.o radv.o slaac.o auth.o ipset.o \
domain.o dnssec.o blockdata.o tables.o loop.o inotify.o \
- poll.o rrfilter.o edns0.o arp.o crypto.o
+ poll.o rrfilter.o edns0.o arp.o crypto.o dump.o
hdrs = dnsmasq.h config.h dhcp-protocol.h dhcp6-protocol.h \
dns-protocol.h radv-protocol.h ip6addr.h
--- a/bld/Android.mk
+++ b/bld/Android.mk
@@ -10,7 +10,8 @@ LOCAL_SRC_FILES := bpf.c cache.c dbus.c
dhcp6.c rfc3315.c dhcp-common.c outpacket.c \
radv.c slaac.c auth.c ipset.c domain.c \
dnssec.c dnssec-openssl.c blockdata.c tables.c \
- loop.c inotify.c poll.c rrfilter.c edns0.c arp.c crypto.c
+ loop.c inotify.c poll.c rrfilter.c edns0.c arp.c \
+ crypto.c dump.c
LOCAL_MODULE := dnsmasq
--- a/man/dnsmasq.8
+++ b/man/dnsmasq.8
@@ -647,6 +647,13 @@ V4 mapped IPv6 addresses, which have a r
The address range can be of the form
<ip address>,<ip address> or <ip address>/<netmask> in both forms of the option.
.TP
+.B --dumpfile=<path/to/file>
+Specify the location of a pcap-format file which dnsmasq uses to dump copies of network packets for debugging purposes. If the file exists when dnsmasq starts, it is not deleted; new packets are added to the end.
+.TP
+.B --dumpmask=<mask>
+Specify which types of packets should be added to the dumpfile. The argument should be the OR of the bitmasks for each type of packet to be dumped: it can be specified in hex by preceding the number with 0x in the normal way. Each time a packet is written to the dumpfile, dnsmasq logs the packet sequence and the mask
+representing its type. The current types are: 0x0001 - DNS queries from clients 0x0002 DNS replies to clients 0x0004 - DNS queries to upstream 0x0008 - DNS replies from upstream 0x0010 - queries send upstream for DNSSEC validation 0x0020 - replies to queries for DNSSEC validation 0x0040 - replies to client queries which fail DNSSEC validation 0x0080 replies to queries for DNSSEC validation which fail validation.
+.TP
.B --add-mac[=base64|text]
Add the MAC address of the requestor to DNS queries which are
forwarded upstream. This may be used to DNS filtering by the upstream
--- a/src/config.h
+++ b/src/config.h
@@ -117,6 +117,9 @@ HAVE_AUTH
HAVE_DNSSEC
include DNSSEC validator.
+HAVE_DUMPFILE
+ include code to dump packets to a libpcap-format file for debugging.
+
HAVE_LOOP
include functionality to probe for and remove DNS forwarding loops.
@@ -132,6 +135,7 @@ NO_DHCP6
NO_SCRIPT
NO_LARGEFILE
NO_AUTH
+NO_DUMPFILE
NO_INOTIFY
these are available to explicitly disable compile time options which would
otherwise be enabled automatically (HAVE_IPV6, >2Gb file sizes) or
@@ -164,6 +168,7 @@ RESOLVFILE
#define HAVE_AUTH
#define HAVE_IPSET
#define HAVE_LOOP
+#define HAVE_DUMPFILE
/* Build options which require external libraries.
@@ -363,6 +368,10 @@ HAVE_SOCKADDR_SA_LEN
#undef HAVE_LOOP
#endif
+#ifdef NO_DUMPFILE
+#undef HAVE_DUMPFILE
+#endif
+
#if defined (HAVE_LINUX_NETWORK) && !defined(NO_INOTIFY)
#define HAVE_INOTIFY
#endif
@@ -451,8 +460,11 @@ static char *compile_opts =
#ifndef HAVE_INOTIFY
"no-"
#endif
-"inotify";
-
+"inotify "
+#ifndef HAVE_DUMPFILE
+"no-"
+#endif
+"dumpfile";
#endif
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -366,7 +366,16 @@ int main (int argc, char **argv)
else
daemon->inotifyfd = -1;
#endif
-
+
+ if (daemon->dump_file)
+#ifdef HAVE_DUMPFILE
+ dump_init();
+ else
+ daemon->dumpfd = -1;
+#else
+ die(_("Packet dumps not available: set HAVE_DUMP in src/config.h"), NULL, EC_BADCONF);
+#endif
+
if (option_bool(OPT_DBUS))
#ifdef HAVE_DBUS
{
@@ -1424,6 +1433,11 @@ static void async_event(int pipe, time_t
if (daemon->runfile)
unlink(daemon->runfile);
+
+#ifdef HAVE_DUMPFILE
+ if (daemon->dumpfd != -1)
+ close(daemon->dumpfd);
+#endif
my_syslog(LOG_INFO, _("exiting on receipt of SIGTERM"));
flush_log();
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -119,6 +119,9 @@ typedef unsigned long long u64;
#include <net/if_arp.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
+#ifdef HAVE_IPV6
+#include <netinet/ip6.h>
+#endif
#include <netinet/ip_icmp.h>
#include <sys/uio.h>
#include <syslog.h>
@@ -598,6 +601,16 @@ struct hostsfile {
unsigned int index; /* matches to cache entries for logging */
};
+/* packet-dump flags */
+#define DUMP_QUERY 0x0001
+#define DUMP_REPLY 0x0002
+#define DUMP_UP_QUERY 0x0004
+#define DUMP_UP_REPLY 0x0008
+#define DUMP_SEC_QUERY 0x0010
+#define DUMP_SEC_REPLY 0x0020
+#define DUMP_BOGUS 0x0040
+#define DUMP_SEC_BOGUS 0x0080
+
/* DNSSEC status values. */
#define STAT_SECURE 1
@@ -1020,14 +1033,14 @@ extern struct daemon {
unsigned int duid_enterprise, duid_config_len;
unsigned char *duid_config;
char *dbus_name;
+ char *dump_file;
+ int dump_mask;
unsigned long soa_sn, soa_refresh, soa_retry, soa_expiry;
#ifdef OPTION6_PREFIX_CLASS
struct prefix_class *prefix_classes;
#endif
#ifdef HAVE_DNSSEC
struct ds_config *ds;
- int dnssec_no_time_check;
- int back_to_the_future;
char *timestamp_file;
#endif
@@ -1040,6 +1053,8 @@ extern struct daemon {
char *workspacename; /* ditto */
char *rr_status; /* flags for individual RRs */
int rr_status_sz;
+ int dnssec_no_time_check;
+ int back_to_the_future;
#endif
unsigned int local_answer, queries_forwarded, auth_answer;
struct frec *frec_list;
@@ -1094,6 +1109,10 @@ extern struct daemon {
char *addrbuff;
char *addrbuff2; /* only allocated when OPT_EXTRALOG */
+#ifdef HAVE_DUMPFILE
+ /* file for packet dumps. */
+ int dumpfd;
+#endif
} *daemon;
/* cache.c */
@@ -1588,3 +1607,9 @@ int check_source(struct dns_header *head
/* arp.c */
int find_mac(union mysockaddr *addr, unsigned char *mac, int lazy, time_t now);
int do_arp_script_run(void);
+
+/* dump.c */
+#ifdef HAVE_DUMPFILE
+void dump_init(void);
+void dump_packet(int mask, void *packet, size_t len, union mysockaddr *src, union mysockaddr *dst);
+#endif
--- /dev/null
+++ b/src/dump.c
@@ -0,0 +1,210 @@
+/* dnsmasq is Copyright (c) 2000-2018 Simon Kelley
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 dated June, 1991, or
+ (at your option) version 3 dated 29 June, 2007.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "dnsmasq.h"
+
+#ifdef HAVE_DUMPFILE
+
+static u32 packet_count;
+
+/* https://wiki.wireshark.org/Development/LibpcapFileFormat */
+struct pcap_hdr_s {
+ u32 magic_number; /* magic number */
+ u16 version_major; /* major version number */
+ u16 version_minor; /* minor version number */
+ u32 thiszone; /* GMT to local correction */
+ u32 sigfigs; /* accuracy of timestamps */
+ u32 snaplen; /* max length of captured packets, in octets */
+ u32 network; /* data link type */
+};
+
+struct pcaprec_hdr_s {
+ u32 ts_sec; /* timestamp seconds */
+ u32 ts_usec; /* timestamp microseconds */
+ u32 incl_len; /* number of octets of packet saved in file */
+ u32 orig_len; /* actual length of packet */
+};
+
+
+void dump_init(void)
+{
+ struct stat buf;
+ struct pcap_hdr_s header;
+ struct pcaprec_hdr_s pcap_header;
+
+ packet_count = 0;
+
+ if (stat(daemon->dump_file, &buf) == -1)
+ {
+ /* doesn't exist, create and add header */
+ header.magic_number = 0xa1b2c3d4;
+ header.version_major = 2;
+ header.version_minor = 4;
+ header.thiszone = 0;
+ header.sigfigs = 0;
+ header.snaplen = daemon->edns_pktsz + 200; /* slop for IP/UDP headers */
+ header.network = 101; /* DLT_RAW http://www.tcpdump.org/linktypes.html */
+
+ if (errno != ENOENT ||
+ (daemon->dumpfd = creat(daemon->dump_file, S_IRUSR | S_IWUSR)) == -1 ||
+ !read_write(daemon->dumpfd, (void *)&header, sizeof(header), 0))
+ die(_("cannot create %s: %s"), daemon->dump_file, EC_FILE);
+ }
+ else if ((daemon->dumpfd = open(daemon->dump_file, O_APPEND | O_RDWR)) == -1 ||
+ !read_write(daemon->dumpfd, (void *)&header, sizeof(header), 1) ||
+ header.magic_number != 0xa1b2c3d4)
+ die(_("cannot access %s: %s"), daemon->dump_file, EC_FILE);
+ else
+ {
+ /* count existing records */
+ while (read_write(daemon->dumpfd, (void *)&pcap_header, sizeof(pcap_header), 1))
+ {
+ lseek(daemon->dumpfd, pcap_header.incl_len, SEEK_CUR);
+ packet_count++;
+ }
+ }
+}
+
+void dump_packet(int mask, void *packet, size_t len, union mysockaddr *src, union mysockaddr *dst)
+{
+ struct ip ip;
+#ifdef HAVE_IPV6
+ struct ip6_hdr ip6;
+ int family;
+#endif
+ struct udphdr {
+ u16 uh_sport; /* source port */
+ u16 uh_dport; /* destination port */
+ u16 uh_ulen; /* udp length */
+ u16 uh_sum; /* udp checksum */
+ } udp;
+ struct pcaprec_hdr_s pcap_header;
+ struct timeval time;
+ u32 i, sum;
+ void *iphdr;
+ size_t ipsz;
+ int rc;
+
+ if (daemon->dumpfd == -1 || !(mask & daemon->dump_mask))
+ return;
+
+ /* So wireshark can Id the packet. */
+ udp.uh_sport = udp.uh_dport = htons(NAMESERVER_PORT);
+
+#ifdef HAVE_IPV6
+ if (src)
+ family = src->sa.sa_family;
+ else
+ family = dst->sa.sa_family;
+
+ if (family == AF_INET6)
+ {
+ iphdr = &ip6;
+ ipsz = sizeof(ip6);
+ memset(&ip6, 0, sizeof(ip6));
+
+ ip6.ip6_vfc = 6 << 4;
+ ip6.ip6_plen = htons(sizeof(struct udphdr) + len);
+ ip6.ip6_nxt = IPPROTO_UDP;
+ ip6.ip6_hops = 64;
+
+ if (src)
+ {
+ memcpy(&ip6.ip6_src, &src->in6.sin6_addr, IN6ADDRSZ);
+ udp.uh_sport = src->in6.sin6_port;
+ }
+
+ if (dst)
+ {
+ memcpy(&ip6.ip6_dst, &dst->in6.sin6_addr, IN6ADDRSZ);
+ udp.uh_dport = dst->in6.sin6_port;
+ }
+
+ /* start UDP checksum */
+ for (sum = 0, i = 0; i < IN6ADDRSZ; i++)
+ sum += ((u16 *)&ip6.ip6_src)[i];
+ }
+ else
+#endif
+ {
+ iphdr = &ip;
+ ipsz = sizeof(ip);
+ memset(&ip, 0, sizeof(ip));
+
+ ip.ip_v = IPVERSION;
+ ip.ip_hl = sizeof(struct ip) / 4;
+ ip.ip_len = htons(sizeof(struct ip) + sizeof(struct udphdr) + len);
+ ip.ip_ttl = IPDEFTTL;
+ ip.ip_p = IPPROTO_UDP;
+
+ if (src)
+ {
+ ip.ip_src = src->in.sin_addr;
+ udp.uh_sport = src->in.sin_port;
+ }
+
+ if (dst)
+ {
+ ip.ip_dst = dst->in.sin_addr;
+ udp.uh_dport = dst->in.sin_port;
+ }
+
+ ip.ip_sum = 0;
+ for (sum = 0, i = 0; i < sizeof(struct ip) / 2; i++)
+ sum += ((u16 *)&ip)[i];
+ while (sum >> 16)
+ sum = (sum & 0xffff) + (sum >> 16);
+ ip.ip_sum = (sum == 0xffff) ? sum : ~sum;
+
+ /* start UDP checksum */
+ sum = ip.ip_src.s_addr & 0xffff;
+ sum += (ip.ip_src.s_addr >> 16) & 0xffff;
+ sum += ip.ip_dst.s_addr & 0xffff;
+ sum += (ip.ip_dst.s_addr >> 16) & 0xffff;
+ }
+
+ if (len & 1)
+ ((unsigned char *)packet)[len] = 0; /* for checksum, in case length is odd. */
+
+ udp.uh_sum = 0;
+ udp.uh_ulen = htons(sizeof(struct udphdr) + len);
+ sum += htons(IPPROTO_UDP);
+ sum += htons(sizeof(struct udphdr) + len);
+ for (i = 0; i < sizeof(struct udphdr)/2; i++)
+ sum += ((u16 *)&udp)[i];
+ for (i = 0; i < (len + 1) / 2; i++)
+ sum += ((u16 *)packet)[i];
+ while (sum >> 16)
+ sum = (sum & 0xffff) + (sum >> 16);
+ udp.uh_sum = (sum == 0xffff) ? sum : ~sum;
+
+ rc = gettimeofday(&time, NULL);
+ pcap_header.ts_sec = time.tv_sec;
+ pcap_header.ts_usec = time.tv_usec;
+ pcap_header.incl_len = pcap_header.orig_len = ipsz + sizeof(udp) + len;
+
+ if (rc == -1 ||
+ !read_write(daemon->dumpfd, (void *)&pcap_header, sizeof(pcap_header), 0) ||
+ !read_write(daemon->dumpfd, iphdr, ipsz, 0) ||
+ !read_write(daemon->dumpfd, (void *)&udp, sizeof(udp), 0) ||
+ !read_write(daemon->dumpfd, (void *)packet, len, 0))
+ my_syslog(LOG_ERR, _("failed to write packet dump"));
+ else
+ my_syslog(LOG_INFO, _("dumping UDP packet %u mask 0x%04x"), ++packet_count, mask);
+
+}
+
+#endif
--- a/src/forward.c
+++ b/src/forward.c
@@ -508,6 +508,10 @@ static int forward_query(int udpfd, unio
if (errno == 0)
{
+#ifdef HAVE_DUMPFILE
+ dump_packet(DUMP_UP_QUERY, (void *)header, plen, NULL, &start->addr);
+#endif
+
/* Keep info in case we want to re-send this packet */
daemon->srv_save = start;
daemon->packet_len = plen;
@@ -769,7 +773,7 @@ void reply_query(int fd, int family, tim
#endif
header = (struct dns_header *)daemon->packet;
-
+
if (n < (int)sizeof(struct dns_header) || !(header->hb3 & HB3_QR))
return;
@@ -796,6 +800,12 @@ void reply_query(int fd, int family, tim
if (!(forward = lookup_frec(ntohs(header->id), hash)))
return;
+#ifdef HAVE_DUMPFILE
+ dump_packet((forward->flags & (FREC_DNSKEY_QUERY | FREC_DS_QUERY)) ? DUMP_SEC_REPLY : DUMP_UP_REPLY,
+ (void *)header, n, &serveraddr, NULL);
+#endif
+
+
/* log_query gets called indirectly all over the place, so
pass these in global variables - sorry. */
daemon->log_display_id = forward->log_id;
@@ -934,6 +944,11 @@ void reply_query(int fd, int family, tim
status = dnssec_validate_reply(now, header, n, daemon->namebuff, daemon->keyname, &forward->class,
!option_bool(OPT_DNSSEC_IGN_NS) && (server->flags & SERV_DO_DNSSEC),
NULL, NULL);
+#ifdef HAVE_DUMPFILE
+ if (status == STAT_BOGUS)
+ dump_packet((forward->flags & (FREC_DNSKEY_QUERY | FREC_DS_QUERY)) ? DUMP_SEC_BOGUS : DUMP_BOGUS,
+ header, (size_t)n, &serveraddr, NULL);
+#endif
}
/* Can't validate, as we're missing key data. Put this
@@ -1060,6 +1075,11 @@ void reply_query(int fd, int family, tim
setsockopt(fd, SOL_SOCKET, SO_MARK, &mark, sizeof(unsigned int));
}
#endif
+
+#ifdef HAVE_DUMPFILE
+ dump_packet(DUMP_SEC_QUERY, (void *)header, (size_t)nn, NULL, &server->addr);
+#endif
+
while (retry_send(sendto(fd, (char *)header, nn, 0,
&server->addr.sa,
sa_len(&server->addr))));
@@ -1114,8 +1134,8 @@ void reply_query(int fd, int family, tim
bogusanswer = 1;
}
}
-#endif
-
+#endif
+
/* restore CD bit to the value in the query */
if (forward->flags & FREC_CHECKING_DISABLED)
header->hb4 |= HB4_CD;
@@ -1141,6 +1161,11 @@ void reply_query(int fd, int family, tim
nn = resize_packet(header, nn, NULL, 0);
}
#endif
+
+#ifdef HAVE_DUMPFILE
+ dump_packet(DUMP_REPLY, daemon->packet, (size_t)nn, NULL, &forward->source);
+#endif
+
send_from(forward->fd, option_bool(OPT_NOWILD) || option_bool (OPT_CLEVERBIND), daemon->packet, nn,
&forward->source, &forward->dest, forward->iface);
}
@@ -1394,7 +1419,11 @@ void receive_query(struct listener *list
pass these in global variables - sorry. */
daemon->log_display_id = ++daemon->log_id;
daemon->log_source_addr = &source_addr;
-
+
+#ifdef HAVE_DUMPFILE
+ dump_packet(DUMP_QUERY, daemon->packet, (size_t)n, &source_addr, NULL);
+#endif
+
if (extract_request(header, (size_t)n, daemon->namebuff, &type))
{
#ifdef HAVE_AUTH
--- a/src/option.c
+++ b/src/option.c
@@ -161,6 +161,8 @@ struct myoption {
#define LOPT_TFTP_MTU 349
#define LOPT_REPLY_DELAY 350
#define LOPT_RAPID_COMMIT 351
+#define LOPT_DUMPFILE 352
+#define LOPT_DUMPMASK 353
#ifdef HAVE_GETOPT_LONG
static const struct option opts[] =
@@ -327,6 +329,8 @@ static const struct myoption opts[] =
{ "dhcp-ttl", 1, 0 , LOPT_DHCPTTL },
{ "dhcp-reply-delay", 1, 0, LOPT_REPLY_DELAY },
{ "dhcp-rapid-commit", 0, 0, LOPT_RAPID_COMMIT },
+ { "dumpfile", 1, 0, LOPT_DUMPFILE },
+ { "dumpmask", 1, 0, LOPT_DUMPMASK },
{ NULL, 0, 0, 0 }
};
@@ -500,6 +504,8 @@ static struct {
{ LOPT_DHCPTTL, ARG_ONE, "<ttl>", gettext_noop("Set TTL in DNS responses with DHCP-derived addresses."), NULL },
{ LOPT_REPLY_DELAY, ARG_ONE, "<integer>", gettext_noop("Delay DHCP replies for at least number of seconds."), NULL },
{ LOPT_RAPID_COMMIT, OPT_RAPID_COMMIT, NULL, gettext_noop("Enables DHCPv4 Rapid Commit option."), NULL },
+ { LOPT_DUMPFILE, ARG_ONE, "<path>", gettext_noop("Path to debug packet dump file"), NULL },
+ { LOPT_DUMPMASK, ARG_ONE, "<hex>", gettext_noop("Mask which packets to dump"), NULL },
{ 0, 0, NULL, NULL, NULL }
};
@@ -1811,6 +1817,14 @@ static int one_opt(int option, char *arg
ret_err(_("bad MX target"));
break;
+ case LOPT_DUMPFILE: /* --dumpfile */
+ daemon->dump_file = opt_string_alloc(arg);
+ break;
+
+ case LOPT_DUMPMASK: /* --dumpmask */
+ daemon->dump_mask = strtol(arg, NULL, 0);
+ break;
+
#ifdef HAVE_DHCP
case 'l': /* --dhcp-leasefile */
daemon->lease_file = opt_string_alloc(arg);

22
package/network/services/dnsmasq/patches/0005-Retry-query-to-other-servers-on-receipt-of-SERVFAIL-.patch Normal file
View file

@ -0,0 +1,22 @@
From 34e26e14c5e0fb2d5f05f67858319c9db2058333 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 10 May 2018 20:54:57 +0100
Subject: [PATCH 05/10] Retry query to other servers on receipt of SERVFAIL
rcode.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/forward.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/src/forward.c
+++ b/src/forward.c
@@ -817,7 +817,7 @@ void reply_query(int fd, int family, tim
/* Note: if we send extra options in the EDNS0 header, we can't recreate
the query from the reply. */
- if (RCODE(header) == REFUSED &&
+ if ((RCODE(header) == REFUSED || RCODE(header) == SERVFAIL) &&
forward->forwardall == 0 &&
!(forward->flags & FREC_HAS_EXTRADATA))
/* for broken servers, attempt to send to another one. */

87
package/network/services/dnsmasq/patches/0006-Handle-query-retry-on-REFUSED-or-SERVFAIL-for-DNSSEC.patch Normal file
View file

@ -0,0 +1,87 @@
From a0088e83640d7d1544127dd668660462e9f78e52 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 10 May 2018 21:43:14 +0100
Subject: [PATCH 06/10] Handle query retry on REFUSED or SERVFAIL for
DNSSEC-generated queries.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/forward.c | 46 ++++++++++++++++++++++++++++++++++++++++------
1 file changed, 40 insertions(+), 6 deletions(-)
--- a/src/forward.c
+++ b/src/forward.c
@@ -298,9 +298,9 @@ static int forward_query(int udpfd, unio
fd = forward->rfd4->fd;
}
- while (retry_send( sendto(fd, (char *)header, plen, 0,
- &forward->sentto->addr.sa,
- sa_len(&forward->sentto->addr))));
+ while (retry_send(sendto(fd, (char *)header, plen, 0,
+ &forward->sentto->addr.sa,
+ sa_len(&forward->sentto->addr))));
return 1;
}
@@ -804,8 +804,7 @@ void reply_query(int fd, int family, tim
dump_packet((forward->flags & (FREC_DNSKEY_QUERY | FREC_DS_QUERY)) ? DUMP_SEC_REPLY : DUMP_UP_REPLY,
(void *)header, n, &serveraddr, NULL);
#endif
-
-
+
/* log_query gets called indirectly all over the place, so
pass these in global variables - sorry. */
daemon->log_display_id = forward->log_id;
@@ -826,6 +825,40 @@ void reply_query(int fd, int family, tim
size_t plen;
int is_sign;
+ /* For DNSSEC originated queries, just retry the query to the same server. */
+ if (forward->flags & (FREC_DNSKEY_QUERY | FREC_DS_QUERY))
+ {
+ blockdata_retrieve(forward->stash, forward->stash_len, (void *)header);
+ plen = forward->stash_len;
+
+ forward->forwardall = 2; /* only retry once */
+
+ if (forward->sentto->addr.sa.sa_family == AF_INET)
+ log_query(F_NOEXTRA | F_DNSSEC | F_IPV4, "retry", (struct all_addr *)&forward->sentto->addr.in.sin_addr, "dnssec");
+#ifdef HAVE_IPV6
+ else
+ log_query(F_NOEXTRA | F_DNSSEC | F_IPV6, "retry", (struct all_addr *)&forward->sentto->addr.in6.sin6_addr, "dnssec");
+#endif
+
+ if (forward->sentto->sfd)
+ fd = forward->sentto->sfd->fd;
+ else
+ {
+#ifdef HAVE_IPV6
+ if (forward->sentto->addr.sa.sa_family == AF_INET6)
+ fd = forward->rfd6->fd;
+ else
+#endif
+ fd = forward->rfd4->fd;
+ }
+
+ while (retry_send(sendto(fd, (char *)header, plen, 0,
+ &forward->sentto->addr.sa,
+ sa_len(&forward->sentto->addr))));
+
+ return;
+ }
+
/* In strict order mode, there must be a server later in the chain
left to send to, otherwise without the forwardall mechanism,
code further on will cycle around the list forwever if they
@@ -1017,7 +1050,8 @@ void reply_query(int fd, int family, tim
#ifdef HAVE_IPV6
new->rfd6 = NULL;
#endif
- new->flags &= ~(FREC_DNSKEY_QUERY | FREC_DS_QUERY);
+ new->flags &= ~(FREC_DNSKEY_QUERY | FREC_DS_QUERY | FREC_HAS_EXTRADATA);
+ new->forwardall = 0;
new->dependent = forward; /* to find query awaiting new one. */
forward->blocking_query = new; /* for garbage cleaning */

100
package/network/services/dnsmasq/patches/0007-Retry-SERVFAIL-DNSSEC-queries-to-a-different-server-.patch Normal file
View file

@ -0,0 +1,100 @@
From 1f60a18ea1c64beb8b6cffa0650a2bfad95ac352 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 11 May 2018 16:44:16 +0100
Subject: [PATCH 07/10] Retry SERVFAIL DNSSEC queries to a different server, if
possible.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/forward.c | 53 ++++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 42 insertions(+), 11 deletions(-)
--- a/src/forward.c
+++ b/src/forward.c
@@ -825,9 +825,12 @@ void reply_query(int fd, int family, tim
size_t plen;
int is_sign;
+#ifdef HAVE_DNSSEC
/* For DNSSEC originated queries, just retry the query to the same server. */
if (forward->flags & (FREC_DNSKEY_QUERY | FREC_DS_QUERY))
{
+ struct server *start;
+
blockdata_retrieve(forward->stash, forward->stash_len, (void *)header);
plen = forward->stash_len;
@@ -839,26 +842,54 @@ void reply_query(int fd, int family, tim
else
log_query(F_NOEXTRA | F_DNSSEC | F_IPV6, "retry", (struct all_addr *)&forward->sentto->addr.in6.sin6_addr, "dnssec");
#endif
-
- if (forward->sentto->sfd)
- fd = forward->sentto->sfd->fd;
+
+ start = forward->sentto;
+
+ /* for non-domain specific servers, see if we can find another to try. */
+ if ((forward->sentto->flags & SERV_TYPE) == 0)
+ while (1)
+ {
+ if (!(start = start->next))
+ start = daemon->servers;
+ if (start == forward->sentto)
+ break;
+
+ if ((start->flags & SERV_TYPE) == 0 &&
+ (start->flags & SERV_DO_DNSSEC))
+ break;
+ }
+
+
+ if (start->sfd)
+ fd = start->sfd->fd;
else
{
#ifdef HAVE_IPV6
- if (forward->sentto->addr.sa.sa_family == AF_INET6)
- fd = forward->rfd6->fd;
+ if (start->addr.sa.sa_family == AF_INET6)
+ {
+ /* may have changed family */
+ if (!forward->rfd6)
+ forward->rfd6 = allocate_rfd(AF_INET6);
+ fd = forward->rfd6->fd;
+ }
else
#endif
- fd = forward->rfd4->fd;
+ {
+ /* may have changed family */
+ if (!forward->rfd4)
+ forward->rfd4 = allocate_rfd(AF_INET);
+ fd = forward->rfd4->fd;
+ }
}
-
+
while (retry_send(sendto(fd, (char *)header, plen, 0,
- &forward->sentto->addr.sa,
- sa_len(&forward->sentto->addr))));
+ &start->addr.sa,
+ sa_len(&start->addr))));
return;
}
-
+#endif
+
/* In strict order mode, there must be a server later in the chain
left to send to, otherwise without the forwardall mechanism,
code further on will cycle around the list forwever if they
@@ -1024,7 +1055,7 @@ void reply_query(int fd, int family, tim
while (1)
{
if (type == (start->flags & (SERV_TYPE | SERV_DO_DNSSEC)) &&
- (type != SERV_HAS_DOMAIN || hostname_isequal(domain, start->domain)) &&
+ ((type & SERV_TYPE) != SERV_HAS_DOMAIN || hostname_isequal(domain, start->domain)) &&
!(start->flags & (SERV_LITERAL_ADDRESS | SERV_LOOP)))
{
new_server = start;

41
package/network/services/dnsmasq/patches/0008-Fix-logging-in-previous.patch Normal file
View file

@ -0,0 +1,41 @@
From e27825b0ef1e79ab05b1752c8c838cb43ad39d79 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 11 May 2018 17:20:47 +0100
Subject: [PATCH 08/10] Fix logging in previous.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/forward.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
--- a/src/forward.c
+++ b/src/forward.c
@@ -835,14 +835,6 @@ void reply_query(int fd, int family, tim
plen = forward->stash_len;
forward->forwardall = 2; /* only retry once */
-
- if (forward->sentto->addr.sa.sa_family == AF_INET)
- log_query(F_NOEXTRA | F_DNSSEC | F_IPV4, "retry", (struct all_addr *)&forward->sentto->addr.in.sin_addr, "dnssec");
-#ifdef HAVE_IPV6
- else
- log_query(F_NOEXTRA | F_DNSSEC | F_IPV6, "retry", (struct all_addr *)&forward->sentto->addr.in6.sin6_addr, "dnssec");
-#endif
-
start = forward->sentto;
/* for non-domain specific servers, see if we can find another to try. */
@@ -886,6 +878,13 @@ void reply_query(int fd, int family, tim
&start->addr.sa,
sa_len(&start->addr))));
+ if (start->addr.sa.sa_family == AF_INET)
+ log_query(F_NOEXTRA | F_DNSSEC | F_IPV4, "retry", (struct all_addr *)&start->addr.in.sin_addr, "dnssec");
+#ifdef HAVE_IPV6
+ else
+ log_query(F_NOEXTRA | F_DNSSEC | F_IPV6, "retry", (struct all_addr *)&start->addr.in6.sin6_addr, "dnssec");
+#endif
+
return;
}
#endif

44
package/network/services/dnsmasq/patches/0009-Do-unsolicited-RAs-for-interfaces-which-appear-after.patch Normal file
View file

@ -0,0 +1,44 @@
From 0a496f059c1e9d75c33cce4c1211d58422ba4f62 Mon Sep 17 00:00:00 2001
From: Maarten de Vries <maarten+dnsmasq@m.de-vri.es>
Date: Fri, 11 May 2018 23:20:58 +0100
Subject: [PATCH 09/10] Do unsolicited RAs for interfaces which appear after
dnsmasq startup.
I noticed that dnsmasq often wasn't sending any unsolicited RAs for me.
This turned out to happen when the interface (a bridge interface) wasn't
created yet at the time dnsmasq started. When dnsmasq is started after
the interface is created, it sends RAs as expected. I assume this also
extends to other types of virtual interfaces that are created after
dnsmasq starts.
Digging into the source, it seems to be caused by a missing call to
ra_start_unsolicited for non-template contexts in construct_worker from
src/dhcp6.c. The attached patch adds that call, but only if the
interface index or address changed to prevent doing fast RAs for no reason.
I tested it on my own server and it appears to work as expected. When
the interface is created and configured, dnsmasq does fast RAs for a
while and then settles into slow RAs.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dhcp6.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -647,6 +647,13 @@ static int construct_worker(struct in6_a
is_same_net6(local, &template->start6, template->prefix) &&
is_same_net6(local, &template->end6, template->prefix))
{
+ /* First time found, do fast RA. */
+ if (template->if_index != if_index || !IN6_ARE_ADDR_EQUAL(&template->local6, local))
+ {
+ ra_start_unsolicited(param->now, template);
+ param->newone = 1;
+ }
+
template->if_index = if_index;
template->local6 = *local;
}

38
package/network/services/dnsmasq/patches/0010-Log-warning-on-very-large-cachesize-config-instead-o.patch Normal file
View file

@ -0,0 +1,38 @@
From 1f1873aadd092a0fab505dd278a484d887ba0ec3 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Fri, 11 May 2018 23:38:23 +0100
Subject: [PATCH 10/10] Log warning on very large cachesize config, instead of
truncating it.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dnsmasq.c | 6 +++++-
src/option.c | 2 --
2 files changed, 5 insertions(+), 3 deletions(-)
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -740,7 +740,11 @@ int main (int argc, char **argv)
else
{
if (daemon->cachesize != 0)
- my_syslog(LOG_INFO, _("started, version %s cachesize %d"), VERSION, daemon->cachesize);
+ {
+ my_syslog(LOG_INFO, _("started, version %s cachesize %d"), VERSION, daemon->cachesize);
+ if (daemon->cachesize > 10000)
+ my_syslog(LOG_WARNING, _("cache size greater than 10000 may cause performance issues, and is unlikely to be useful."));
+ }
else
my_syslog(LOG_INFO, _("started, version %s cache disabled"), VERSION);
--- a/src/option.c
+++ b/src/option.c
@@ -2603,8 +2603,6 @@ static int one_opt(int option, char *arg
if (size < 0)
size = 0;
- else if (size > 10000)
- size = 10000;
daemon->cachesize = size;
}

8
package/network/services/dnsmasq/patches/240-ubus.patch
View file

@ -74,7 +74,7 @@
int main (int argc, char **argv) int main (int argc, char **argv)
{ {
int bind_fallback = 0; int bind_fallback = 0;
@@ -928,6 +988,7 @@ int main (int argc, char **argv) @@ -944,6 +1004,7 @@ int main (int argc, char **argv)
set_dbus_listeners(); set_dbus_listeners();
#endif #endif
@ -82,7 +82,7 @@
#ifdef HAVE_DHCP #ifdef HAVE_DHCP
if (daemon->dhcp || daemon->relay4) if (daemon->dhcp || daemon->relay4)
{ {
@@ -1058,6 +1119,8 @@ int main (int argc, char **argv) @@ -1074,6 +1135,8 @@ int main (int argc, char **argv)
check_dbus_listeners(); check_dbus_listeners();
#endif #endif
@ -104,7 +104,7 @@
mostly_clean : mostly_clean :
--- a/src/dnsmasq.h --- a/src/dnsmasq.h
+++ b/src/dnsmasq.h +++ b/src/dnsmasq.h
@@ -1415,6 +1415,8 @@ void emit_dbus_signal(int action, struct @@ -1440,6 +1440,8 @@ void emit_dbus_signal(int action, struct
# endif # endif
#endif #endif
@ -115,7 +115,7 @@
void ipset_init(void); void ipset_init(void);
--- a/src/rfc2131.c --- a/src/rfc2131.c
+++ b/src/rfc2131.c +++ b/src/rfc2131.c
@@ -1621,6 +1621,10 @@ static void log_packet(char *type, void @@ -1636,6 +1636,10 @@ static void log_packet(char *type, void
daemon->namebuff, daemon->namebuff,
string ? string : "", string ? string : "",
err ? err : ""); err ? err : "");