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Revert "dnsmasq: follow upstream dnsmasq pre-v2.81"

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This reverts commit a6a8fe0be5.

buildbot found an error
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);

revert for the moment

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
v19.07.3_mercusys_ac12_duma
Kevin Darbyshire-Bryant 6 years ago
parent a6a8fe0be5
commit 18e02fa20c
13 changed files with 3 additions and 4523 deletions
Show Stats Download Patch File Download Diff File

2
package/network/services/dnsmasq/Makefile
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=dnsmasq
PKG_VERSION:=2.80
PKG_RELEASE:=3
PKG_RELEASE:=2
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=http://thekelleys.org.uk/dnsmasq

495
package/network/services/dnsmasq/patches/0001-Impove-cache-behaviour-for-TCP-connections.patch
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@ -1,495 +0,0 @@
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.
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
DNS queries answered from TCP connections are not cached: when TCP
connections were rare, this was not a problem. With the coming of
DNSSEC, it's now the case that some DNSSEC queries have answers which
spill to TCP, and if, for instance, this applies to the keys for the
root then those never get cached, and performance is very bad. This
fix passes cache entries back from the TCP child process to the main
server process, and fixes the problem.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
CHANGELOG | 14 ++++
src/blockdata.c | 37 ++++++++-
src/cache.c | 196 ++++++++++++++++++++++++++++++++++++++++++++++--
src/dnsmasq.c | 58 ++++++++++++--
src/dnsmasq.h | 5 ++
5 files changed, 291 insertions(+), 19 deletions(-)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,17 @@
+version 2.81
+ 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 DNS queries answered from TCP connections are not cached:
+ when TCP connections were rare, this was not a problem.
+ With the coming of DNSSEC, it's now the case that some
+ DNSSEC queries have answers which spill to TCP, and if,
+ for instance, this applies to the keys for the root then
+ those never get cached, and performance is very bad.
+ This fix passes cache entries back from the TCP child process to
+ the main server process, and fixes the problem.
+
+
version 2.80
Add support for RFC 4039 DHCP rapid commit. Thanks to Ashram Method
for the initial patch and motivation.
--- a/src/blockdata.c
+++ b/src/blockdata.c
@@ -61,7 +61,7 @@ void blockdata_report(void)
blockdata_alloced * sizeof(struct blockdata));
}
-struct blockdata *blockdata_alloc(char *data, size_t len)
+static struct blockdata *blockdata_alloc_real(int fd, char *data, size_t len)
{
struct blockdata *block, *ret = NULL;
struct blockdata **prev = &ret;
@@ -89,8 +89,17 @@ struct blockdata *blockdata_alloc(char *
blockdata_hwm = blockdata_count;
blen = len > KEYBLOCK_LEN ? KEYBLOCK_LEN : len;
- memcpy(block->key, data, blen);
- data += blen;
+ if (data)
+ {
+ memcpy(block->key, data, blen);
+ data += blen;
+ }
+ else if (!read_write(fd, block->key, blen, 1))
+ {
+ /* failed read free partial chain */
+ blockdata_free(ret);
+ return NULL;
+ }
len -= blen;
*prev = block;
prev = &block->next;
@@ -100,6 +109,10 @@ struct blockdata *blockdata_alloc(char *
return ret;
}
+struct blockdata *blockdata_alloc(char *data, size_t len)
+{
+ return blockdata_alloc_real(0, data, len);
+}
void blockdata_free(struct blockdata *blocks)
{
@@ -148,5 +161,21 @@ void *blockdata_retrieve(struct blockdat
return data;
}
-
+
+
+void blockdata_write(struct blockdata *block, size_t len, int fd)
+{
+ for (; len > 0 && block; block = block->next)
+ {
+ size_t blen = len > KEYBLOCK_LEN ? KEYBLOCK_LEN : len;
+ read_write(fd, block->key, blen, 0);
+ len -= blen;
+ }
+}
+
+struct blockdata *blockdata_read(int fd, size_t len)
+{
+ return blockdata_alloc_real(fd, NULL, len);
+}
+
#endif
--- a/src/cache.c
+++ b/src/cache.c
@@ -26,6 +26,8 @@ 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,
+ 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. */
static const struct {
@@ -464,16 +466,10 @@ void cache_start_insert(void)
new_chain = NULL;
insert_error = 0;
}
-
+
struct crec *cache_insert(char *name, struct all_addr *addr,
time_t now, unsigned long ttl, unsigned short flags)
{
- struct crec *new, *target_crec = NULL;
- union bigname *big_name = NULL;
- int freed_all = flags & F_REVERSE;
- int free_avail = 0;
- unsigned int target_uid;
-
/* Don't log DNSSEC records here, done elsewhere */
if (flags & (F_IPV4 | F_IPV6 | F_CNAME))
{
@@ -484,7 +480,20 @@ struct crec *cache_insert(char *name, st
if (daemon->min_cache_ttl != 0 && daemon->min_cache_ttl > ttl)
ttl = daemon->min_cache_ttl;
}
+
+ return really_insert(name, addr, now, ttl, flags);
+}
+
+static struct crec *really_insert(char *name, struct all_addr *addr,
+ time_t now, unsigned long ttl, unsigned short flags)
+{
+ struct crec *new, *target_crec = NULL;
+ union bigname *big_name = NULL;
+ int freed_all = flags & F_REVERSE;
+ int free_avail = 0;
+ unsigned int target_uid;
+
/* if previous insertion failed give up now. */
if (insert_error)
return NULL;
@@ -645,12 +654,185 @@ void cache_end_insert(void)
cache_hash(new_chain);
cache_link(new_chain);
daemon->metrics[METRIC_DNS_CACHE_INSERTED]++;
+
+ /* If we're a child process, send this cache entry up the pipe to the master.
+ The marshalling process is rather nasty. */
+ if (daemon->pipe_to_parent != -1)
+ {
+ char *name = cache_get_name(new_chain);
+ ssize_t m = strlen(name);
+ unsigned short flags = new_chain->flags;
+#ifdef HAVE_DNSSEC
+ u16 class = new_chain->uid;
+#endif
+
+ read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), 0);
+ read_write(daemon->pipe_to_parent, (unsigned char *)name, m, 0);
+ read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->ttd, sizeof(new_chain->ttd), 0);
+ read_write(daemon->pipe_to_parent, (unsigned char *)&flags, sizeof(flags), 0);
+
+ if (flags & (F_IPV4 | F_IPV6))
+ read_write(daemon->pipe_to_parent, (unsigned char *)&new_chain->addr, sizeof(new_chain->addr), 0);
+#ifdef HAVE_DNSSEC
+ else 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);
+ }
+ 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);
+ }
+ }
+#endif
+
+ }
}
+
new_chain = tmp;
}
+
+ /* signal end of cache insert in master process */
+ if (daemon->pipe_to_parent != -1)
+ {
+ ssize_t m = -1;
+ read_write(daemon->pipe_to_parent, (unsigned char *)&m, sizeof(m), 0);
+ }
+
new_chain = NULL;
}
+
+/* A marshalled cache entry arrives on fd, read, unmarshall and insert into cache of master process. */
+int cache_recv_insert(time_t now, int fd)
+{
+ ssize_t m;
+ struct all_addr addr;
+ unsigned long ttl;
+ time_t ttd;
+ unsigned short flags;
+ struct crec *crecp = NULL;
+
+ cache_start_insert();
+
+ while(1)
+ {
+
+ if (!read_write(fd, (unsigned char *)&m, sizeof(m), 1))
+ return 0;
+
+ if (m == -1)
+ {
+ cache_end_insert();
+ return 1;
+ }
+
+ if (!read_write(fd, (unsigned char *)daemon->namebuff, m, 1) ||
+ !read_write(fd, (unsigned char *)&ttd, sizeof(ttd), 1) ||
+ !read_write(fd, (unsigned char *)&flags, sizeof(flags), 1))
+ return 0;
+
+ daemon->namebuff[m] = 0;
+
+ ttl = difftime(ttd, now);
+
+ if (flags & (F_IPV4 | F_IPV6))
+ {
+ if (!read_write(fd, (unsigned char *)&addr, sizeof(addr), 1))
+ return 0;
+ crecp = really_insert(daemon->namebuff, &addr, now, ttl, flags);
+ }
+ else if (flags & F_CNAME)
+ {
+ struct crec *newc = really_insert(daemon->namebuff, NULL, 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. */
+ if (newc)
+ {
+ if (!crecp)
+ {
+ newc->addr.cname.target.cache = NULL;
+ /* anything other than zero, to avoid being mistaken for CNAME to interface-name */
+ newc->addr.cname.uid = 1;
+ }
+ else
+ {
+ next_uid(crecp);
+ newc->addr.cname.target.cache = crecp;
+ newc->addr.cname.uid = crecp->uid;
+ }
+ }
+ }
+#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;
+ /* Cache needs to known class for DNSSEC stuff */
+ addr.addr.dnssec.class = class;
+
+ crecp = really_insert(daemon->namebuff, &addr, 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
+ }
+}
+
int cache_find_non_terminal(char *name, time_t now)
{
struct crec *crecp;
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -930,6 +930,10 @@ int main (int argc, char **argv)
check_servers();
pid = getpid();
+
+ daemon->pipe_to_parent = -1;
+ for (i = 0; i < MAX_PROCS; i++)
+ daemon->tcp_pipes[i] = -1;
#ifdef HAVE_INOTIFY
/* Using inotify, have to select a resolv file at startup */
@@ -1611,7 +1615,7 @@ static int set_dns_listeners(time_t now)
we don't need to explicitly arrange to wake up here */
if (listener->tcpfd != -1)
for (i = 0; i < MAX_PROCS; i++)
- if (daemon->tcp_pids[i] == 0)
+ if (daemon->tcp_pids[i] == 0 && daemon->tcp_pipes[i] == -1)
{
poll_listen(listener->tcpfd, POLLIN);
break;
@@ -1624,6 +1628,13 @@ static int set_dns_listeners(time_t now)
}
+#ifndef NO_FORK
+ if (!option_bool(OPT_DEBUG))
+ for (i = 0; i < MAX_PROCS; i++)
+ if (daemon->tcp_pipes[i] != -1)
+ poll_listen(daemon->tcp_pipes[i], POLLIN);
+#endif
+
return wait;
}
@@ -1632,7 +1643,10 @@ static void check_dns_listeners(time_t n
struct serverfd *serverfdp;
struct listener *listener;
int i;
-
+#ifndef NO_FORK
+ int pipefd[2];
+#endif
+
for (serverfdp = daemon->sfds; serverfdp; serverfdp = serverfdp->next)
if (poll_check(serverfdp->fd, POLLIN))
reply_query(serverfdp->fd, serverfdp->source_addr.sa.sa_family, now);
@@ -1642,7 +1656,26 @@ static void check_dns_listeners(time_t n
if (daemon->randomsocks[i].refcount != 0 &&
poll_check(daemon->randomsocks[i].fd, POLLIN))
reply_query(daemon->randomsocks[i].fd, daemon->randomsocks[i].family, now);
-
+
+#ifndef NO_FORK
+ /* Races. The child process can die before we read all of the data from the
+ pipe, or vice versa. Therefore send tcp_pids to zero when we wait() the
+ process, and tcp_pipes to -1 and close the FD when we read the last
+ of the data - indicated by cache_recv_insert returning zero.
+ The order of these events is indeterminate, and both are needed
+ to free the process slot. Once the child process has gone, poll()
+ returns POLLHUP, not POLLIN, so have to check for both here. */
+ if (!option_bool(OPT_DEBUG))
+ for (i = 0; i < MAX_PROCS; i++)
+ if (daemon->tcp_pipes[i] != -1 &&
+ poll_check(daemon->tcp_pipes[i], POLLIN | POLLHUP) &&
+ !cache_recv_insert(now, daemon->tcp_pipes[i]))
+ {
+ close(daemon->tcp_pipes[i]);
+ daemon->tcp_pipes[i] = -1;
+ }
+#endif
+
for (listener = daemon->listeners; listener; listener = listener->next)
{
if (listener->fd != -1 && poll_check(listener->fd, POLLIN))
@@ -1736,15 +1769,20 @@ static void check_dns_listeners(time_t n
while (retry_send(close(confd)));
}
#ifndef NO_FORK
- else if (!option_bool(OPT_DEBUG) && (p = fork()) != 0)
+ else if (!option_bool(OPT_DEBUG) && pipe(pipefd) == 0 && (p = fork()) != 0)
{
- if (p != -1)
+ close(pipefd[1]); /* parent needs read pipe end. */
+ if (p == -1)
+ close(pipefd[0]);
+ else
{
int i;
+
for (i = 0; i < MAX_PROCS; i++)
- if (daemon->tcp_pids[i] == 0)
+ if (daemon->tcp_pids[i] == 0 && daemon->tcp_pipes[i] == -1)
{
daemon->tcp_pids[i] = p;
+ daemon->tcp_pipes[i] = pipefd[0];
break;
}
}
@@ -1761,7 +1799,7 @@ static void check_dns_listeners(time_t n
int flags;
struct in_addr netmask;
int auth_dns;
-
+
if (iface)
{
netmask = iface->netmask;
@@ -1777,7 +1815,11 @@ static void check_dns_listeners(time_t n
/* Arrange for SIGALRM after CHILD_LIFETIME seconds to
terminate the process. */
if (!option_bool(OPT_DEBUG))
- alarm(CHILD_LIFETIME);
+ {
+ alarm(CHILD_LIFETIME);
+ close(pipefd[0]); /* close read end in child. */
+ daemon->pipe_to_parent = pipefd[1];
+ }
#endif
/* start with no upstream connections. */
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -1091,6 +1091,8 @@ extern struct daemon {
size_t packet_len; /* " " */
struct randfd *rfd_save; /* " " */
pid_t tcp_pids[MAX_PROCS];
+ int tcp_pipes[MAX_PROCS];
+ int pipe_to_parent;
struct randfd randomsocks[RANDOM_SOCKS];
int v6pktinfo;
struct addrlist *interface_addrs; /* list of all addresses/prefix lengths associated with all local interfaces */
@@ -1152,6 +1154,7 @@ struct crec *cache_find_by_name(struct c
char *name, time_t now, unsigned int prot);
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,
time_t now, unsigned long ttl, unsigned short flags);
void cache_reload(void);
@@ -1174,6 +1177,8 @@ void blockdata_init(void);
void blockdata_report(void);
struct blockdata *blockdata_alloc(char *data, size_t len);
void *blockdata_retrieve(struct blockdata *block, size_t len, void *data);
+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

26
package/network/services/dnsmasq/patches/0002-Ensure-that-AD-bit-is-reset-on-answers-from-address-.patch
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@ -1,26 +0,0 @@
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
--address=/<domain>/<address>.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/rfc1035.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -938,9 +938,9 @@ size_t setup_reply(struct dns_header *he
return 0;
/* clear authoritative and truncated flags, set QR flag */
- header->hb3 = (header->hb3 & ~(HB3_AA | HB3_TC)) | HB3_QR;
- /* set RA flag */
- header->hb4 |= HB4_RA;
+ header->hb3 = (header->hb3 & ~(HB3_AA | HB3_TC )) | HB3_QR;
+ /* clear AD flag, set RA flag */
+ header->hb4 = (header->hb4 & ~HB4_AD) | HB4_RA;
header->nscount = htons(0);
header->arcount = htons(0);

2192
package/network/services/dnsmasq/patches/0003-Remove-ability-to-compile-without-IPv6-support.patch
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File diff suppressed because it is too large Load Diff

52
package/network/services/dnsmasq/patches/0004-Don-t-forward-.bind-.server-queries-upstream.patch
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@ -1,52 +0,0 @@
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
Chaos .bind and .server (RFC4892) zones are local, therefore
don't forward queries upstream to avoid mixing with supported
locally and false replies with NO_ID enabled.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/rfc1035.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -1276,7 +1276,7 @@ size_t answer_request(struct dns_header
int q, ans, anscount = 0, addncount = 0;
int dryrun = 0;
struct crec *crecp;
- int nxdomain = 0, auth = 1, trunc = 0, sec_data = 1;
+ int nxdomain = 0, notimp = 0, auth = 1, trunc = 0, sec_data = 1;
struct mx_srv_record *rec;
size_t len;
@@ -1355,6 +1355,17 @@ size_t answer_request(struct dns_header
}
}
+ if (qclass == C_CHAOS)
+ {
+ /* don't forward *.bind and *.server chaos queries */
+ if (hostname_issubdomain("bind", name) || hostname_issubdomain("server", name))
+ {
+ if (!ans)
+ notimp = 1, auth = 0;
+ ans = 1;
+ }
+ }
+
if (qclass == C_IN)
{
struct txt_record *t;
@@ -1903,6 +1914,8 @@ size_t answer_request(struct dns_header
if (nxdomain)
SET_RCODE(header, NXDOMAIN);
+ else if (notimp)
+ SET_RCODE(header, NOTIMP);
else
SET_RCODE(header, NOERROR); /* no error */
header->ancount = htons(anscount);

63
package/network/services/dnsmasq/patches/0005-Fix-logging-in-cf5984367bc6a949e3803a576512c5a7bc48e.patch
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@ -1,63 +0,0 @@
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
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/rfc1035.c | 27 ++++++++++++++++++---------
1 file changed, 18 insertions(+), 9 deletions(-)
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -1335,7 +1335,6 @@ size_t answer_request(struct dns_header
{
unsigned long ttl = daemon->local_ttl;
int ok = 1;
- log_query(F_CONFIG | F_RRNAME, name, NULL, "<TXT>");
#ifndef NO_ID
/* Dynamically generate stat record */
if (t->stat != 0)
@@ -1345,11 +1344,14 @@ size_t answer_request(struct dns_header
ok = 0;
}
#endif
- if (ok && add_resource_record(header, limit, &trunc, nameoffset, &ansp,
- ttl, NULL,
- T_TXT, t->class, "t", t->len, t->txt))
- anscount++;
-
+ if (ok)
+ {
+ log_query(F_CONFIG | F_RRNAME, name, NULL, "<TXT>");
+ if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
+ ttl, NULL,
+ T_TXT, t->class, "t", t->len, t->txt))
+ anscount++;
+ }
}
}
}
@@ -1357,12 +1359,19 @@ size_t answer_request(struct dns_header
if (qclass == C_CHAOS)
{
- /* don't forward *.bind and *.server chaos queries */
+ /* don't forward *.bind and *.server chaos queries - always reply with NOTIMP */
if (hostname_issubdomain("bind", name) || hostname_issubdomain("server", name))
{
if (!ans)
- notimp = 1, auth = 0;
- ans = 1;
+ {
+ notimp = 1, auth = 0;
+ if (!dryrun)
+ {
+ addr.addr.rcode.rcode = NOTIMP;
+ log_query(F_CONFIG | F_RCODE, name, &addr, NULL);
+ }
+ ans = 1;
+ }
}
}

120
package/network/services/dnsmasq/patches/0006-Fix-spurious-AD-flags-in-some-DNS-replies-from-local.patch
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@ -1,120 +0,0 @@
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
config.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/rfc1035.c | 42 ++++++++++++++++++++++++------------------
1 file changed, 24 insertions(+), 18 deletions(-)
--- a/src/rfc1035.c
+++ b/src/rfc1035.c
@@ -1330,7 +1330,7 @@ size_t answer_request(struct dns_header
{
if (t->class == qclass && hostname_isequal(name, t->name))
{
- ans = 1;
+ ans = 1, sec_data = 0;
if (!dryrun)
{
unsigned long ttl = daemon->local_ttl;
@@ -1370,7 +1370,7 @@ size_t answer_request(struct dns_header
addr.addr.rcode.rcode = NOTIMP;
log_query(F_CONFIG | F_RCODE, name, &addr, NULL);
}
- ans = 1;
+ ans = 1, sec_data = 0;
}
}
}
@@ -1725,7 +1725,7 @@ size_t answer_request(struct dns_header
}
else if (is_name_synthetic(flag, name, &addr))
{
- ans = 1;
+ ans = 1, sec_data = 0;
if (!dryrun)
{
log_query(F_FORWARD | F_CONFIG | flag, name, &addr, NULL);
@@ -1763,25 +1763,27 @@ size_t answer_request(struct dns_header
for (rec = daemon->mxnames; rec; rec = rec->next)
if (!rec->issrv && hostname_isequal(name, rec->name))
{
- ans = found = 1;
- if (!dryrun)
- {
- int offset;
- log_query(F_CONFIG | F_RRNAME, name, NULL, "<MX>");
- if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
- &offset, T_MX, C_IN, "sd", rec->weight, rec->target))
- {
- anscount++;
- if (rec->target)
- rec->offset = offset;
- }
- }
+ ans = found = 1;
+ sec_data = 0;
+ if (!dryrun)
+ {
+ int offset;
+ log_query(F_CONFIG | F_RRNAME, name, NULL, "<MX>");
+ if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl,
+ &offset, T_MX, C_IN, "sd", rec->weight, rec->target))
+ {
+ anscount++;
+ if (rec->target)
+ rec->offset = offset;
+ }
+ }
}
if (!found && (option_bool(OPT_SELFMX) || option_bool(OPT_LOCALMX)) &&
cache_find_by_name(NULL, name, now, F_HOSTS | F_DHCP | F_NO_RR))
{
ans = 1;
+ sec_data = 0;
if (!dryrun)
{
log_query(F_CONFIG | F_RRNAME, name, NULL, "<MX>");
@@ -1802,6 +1804,7 @@ size_t answer_request(struct dns_header
if (rec->issrv && hostname_isequal(name, rec->name))
{
found = ans = 1;
+ sec_data = 0;
if (!dryrun)
{
int offset;
@@ -1838,6 +1841,7 @@ size_t answer_request(struct dns_header
if (!found && option_bool(OPT_FILTER) && (qtype == T_SRV || (qtype == T_ANY && strchr(name, '_'))))
{
ans = 1;
+ sec_data = 0;
if (!dryrun)
log_query(F_CONFIG | F_NEG, name, NULL, NULL);
}
@@ -1850,6 +1854,7 @@ size_t answer_request(struct dns_header
if (hostname_isequal(name, na->name))
{
ans = 1;
+ sec_data = 0;
if (!dryrun)
{
log_query(F_CONFIG | F_RRNAME, name, NULL, "<NAPTR>");
@@ -1862,11 +1867,12 @@ size_t answer_request(struct dns_header
}
if (qtype == T_MAILB)
- ans = 1, nxdomain = 1;
+ ans = 1, nxdomain = 1, sec_data = 0;
if (qtype == T_SOA && option_bool(OPT_FILTER))
{
- ans = 1;
+ ans = 1;
+ sec_data = 0;
if (!dryrun)
log_query(F_CONFIG | F_NEG, name, &addr, NULL);
}

71
package/network/services/dnsmasq/patches/0007-Do-not-rely-on-dead-code-elimination-use-array-inste.patch
Unescape Escape View File

@ -1,71 +0,0 @@
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
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.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dnsmasq.h | 11 +++++++----
src/option.c | 10 ++--------
2 files changed, 9 insertions(+), 12 deletions(-)
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -200,9 +200,6 @@ struct event_desc {
#define EC_MISC 5
#define EC_INIT_OFFSET 10
-/* Trust the compiler dead-code eliminator.... */
-#define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
-
#define OPT_BOGUSPRIV 0
#define OPT_FILTER 1
#define OPT_LOG 2
@@ -264,6 +261,12 @@ struct event_desc {
#define OPT_UBUS 58
#define OPT_LAST 59
+#define OPTION_BITS (sizeof(unsigned int)*8)
+#define OPTION_SIZE ( (OPT_LAST/OPTION_BITS)+((OPT_LAST%OPTION_BITS)!=0) )
+#define option_var(x) (daemon->options[(x) / OPTION_BITS])
+#define option_val(x) ((1u) << ((x) % OPTION_BITS))
+#define option_bool(x) (option_var(x) & option_val(x))
+
/* extra flags for my_syslog, we use a couple of facilities since they are known
not to occupy the same bits as priorities, no matter how syslog.h is set up. */
#define MS_TFTP LOG_USER
@@ -978,7 +981,7 @@ extern struct daemon {
config file arguments. All set (including defaults)
in option.c */
- unsigned int options, options2;
+ unsigned int options[OPTION_SIZE];
struct resolvc default_resolv, *resolv_files;
time_t last_resolv;
char *servers_file;
--- a/src/option.c
+++ b/src/option.c
@@ -1490,18 +1490,12 @@ static int parse_dhcp_opt(char *errstr,
void set_option_bool(unsigned int opt)
{
- if (opt < 32)
- daemon->options |= 1u << opt;
- else
- daemon->options2 |= 1u << (opt - 32);
+ option_var(opt) |= option_val(opt);
}
void reset_option_bool(unsigned int opt)
{
- if (opt < 32)
- daemon->options &= ~(1u << opt);
- else
- daemon->options2 &= ~(1u << (opt - 32));
+ option_var(opt) &= ~(option_val(opt));
}
static int one_opt(int option, char *arg, char *errstr, char *gen_err, int command_line, int servers_only)

63
package/network/services/dnsmasq/patches/0008-Fix-Makefile-lines-generating-UBUS-linker-config.patch
Unescape Escape View File

@ -1,63 +0,0 @@
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.
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
config string that inhibts the copy if found. This patch allows that
to be the empty string, for unconditional copy, and modifies the
ubus linker config to use it. It worked by coincidence before, because
there was no config string called "pkg-config".
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
Makefile | 2 +-
bld/pkg-wrapper | 14 ++++++++------
2 files changed, 9 insertions(+), 7 deletions(-)
--- a/Makefile
+++ b/Makefile
@@ -53,7 +53,7 @@ top?=$(CURDIR)
dbus_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DBUS $(PKG_CONFIG) --cflags dbus-1`
dbus_libs = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_DBUS $(PKG_CONFIG) --libs dbus-1`
-ubus_libs = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_UBUS $(PKG_CONFIG) --copy -lubox -lubus`
+ubus_libs = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_UBUS "" --copy -lubox -lubus`
idn_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_IDN $(PKG_CONFIG) --cflags libidn`
idn_libs = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_IDN $(PKG_CONFIG) --libs libidn`
idn2_cflags = `echo $(COPTS) | $(top)/bld/pkg-wrapper HAVE_LIBIDN2 $(PKG_CONFIG) --cflags libidn2`
--- a/bld/pkg-wrapper
+++ b/bld/pkg-wrapper
@@ -11,23 +11,25 @@ in=`cat`
if grep "^\#[[:space:]]*define[[:space:]]*$search" config.h >/dev/null 2>&1 || \
echo $in | grep $search >/dev/null 2>&1; then
-# Nasty, nasty, in --copy, arg 2 is another config to search for, use with NO_GMP
+# Nasty, nasty, in --copy, arg 2 (if non-empty) is another config to search for, used with NO_GMP
if [ $op = "--copy" ]; then
- if grep "^\#[[:space:]]*define[[:space:]]*$pkg" config.h >/dev/null 2>&1 || \
- echo $in | grep $pkg >/dev/null 2>&1; then
+ if [ -z "$pkg" ]; then
+ pkg="$*"
+ elif grep "^\#[[:space:]]*define[[:space:]]*$pkg" config.h >/dev/null 2>&1 || \
+ echo $in | grep $pkg >/dev/null 2>&1; then
pkg=""
else
pkg="$*"
fi
elif grep "^\#[[:space:]]*define[[:space:]]*${search}_STATIC" config.h >/dev/null 2>&1 || \
- echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
+ echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
pkg=`$pkg --static $op $*`
else
pkg=`$pkg $op $*`
fi
-
+
if grep "^\#[[:space:]]*define[[:space:]]*${search}_STATIC" config.h >/dev/null 2>&1 || \
- echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
+ echo $in | grep ${search}_STATIC >/dev/null 2>&1; then
if [ $op = "--libs" ] || [ $op = "--copy" ]; then
echo "-Wl,-Bstatic $pkg -Wl,-Bdynamic"
else

41
package/network/services/dnsmasq/patches/0009-Revert-68f6312d4bae30b78daafcd6f51dc441b8685b1e.patch
Unescape Escape View File

@ -1,41 +0,0 @@
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
The above is intended to increase robustness, but actually does the
opposite. The problem is that by ignoring SERVFAIL messages and hoping
for a better answer from another of the servers we've forwarded to,
we become vulnerable in the case that one or more of the configured
servers is down or not responding.
Consider the case that a domain is indeed BOGUS, and we've send the
query to n servers. With 68f6312d4bae30b78daafcd6f51dc441b8685b1e
we ignore the first n-1 SERVFAIL replies, and only return the
final n'th answer to the client. Now, if one of the servers we are
forwarding to is down, then we won't get all n replies, and the
client will never get an answer! This is a far more likely scenario
than a temporary SERVFAIL from only one of a set of notionally identical
servers, so, on the ground of robustness, we have to believe
any SERVFAIL answers we get, and return them to the client.
The client could be using the same recursive servers we are,
so it should, in theory, retry on SERVFAIL anyway.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/forward.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/src/forward.c
+++ b/src/forward.c
@@ -957,8 +957,7 @@ void reply_query(int fd, int family, tim
we get a good reply from another server. Kill it when we've
had replies from all to avoid filling the forwarding table when
everything is broken */
- if (forward->forwardall == 0 || --forward->forwardall == 1 ||
- (RCODE(header) != REFUSED && RCODE(header) != SERVFAIL))
+ if (forward->forwardall == 0 || --forward->forwardall == 1 || RCODE(header) != REFUSED)
{
int check_rebind = 0, no_cache_dnssec = 0, cache_secure = 0, bogusanswer = 0;

199
package/network/services/dnsmasq/patches/0010-Remove-the-NO_FORK-compile-time-option-and-support-f.patch
Unescape Escape View File

@ -1,199 +0,0 @@
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
uclinux.
In an era where everything has an MMU, this looks like
an anachronism, and it adds to (Ok, multiplies!) the
combinatorial explosion of compile-time options.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
CHANGELOG | 6 ++++++
src/config.h | 21 ++-------------------
src/dnsmasq.c | 14 --------------
src/option.c | 4 +---
4 files changed, 9 insertions(+), 36 deletions(-)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -11,6 +11,12 @@ version 2.81
This fix passes cache entries back from the TCP child process to
the main server process, and fixes the problem.
+ Remove the NO_FORK compile-time option, and support for uclinux.
+ In an era where everything has an MMU, this looks like
+ an anachronism, and it adds to (Ok, multiplies!) the
+ combinatorial explosion of compile-time options. Thanks to
+ Kevin Darbyshire-Bryant for the patch.
+
version 2.80
Add support for RFC 4039 DHCP rapid commit. Thanks to Ashram Method
--- a/src/config.h
+++ b/src/config.h
@@ -239,27 +239,13 @@ HAVE_SOCKADDR_SA_LEN
defined if struct sockaddr has sa_len field (*BSD)
*/
-/* Must precede __linux__ since uClinux defines __linux__ too. */
-#if defined(__uClinux__)
-#define HAVE_LINUX_NETWORK
-#define HAVE_GETOPT_LONG
-#undef HAVE_SOCKADDR_SA_LEN
-/* Never use fork() on uClinux. Note that this is subtly different from the
- --keep-in-foreground option, since it also suppresses forking new
- processes for TCP connections and disables the call-a-script on leasechange
- system. It's intended for use on MMU-less kernels. */
-#define NO_FORK
-
-#elif defined(__UCLIBC__)
+#if defined(__UCLIBC__)
#define HAVE_LINUX_NETWORK
#if defined(__UCLIBC_HAS_GNU_GETOPT__) || \
((__UCLIBC_MAJOR__==0) && (__UCLIBC_MINOR__==9) && (__UCLIBC_SUBLEVEL__<21))
# define HAVE_GETOPT_LONG
#endif
#undef HAVE_SOCKADDR_SA_LEN
-#if !defined(__ARCH_HAS_MMU__) && !defined(__UCLIBC_HAS_MMU__)
-# define NO_FORK
-#endif
#if defined(__UCLIBC_HAS_IPV6__)
# ifndef IPV6_V6ONLY
# define IPV6_V6ONLY 26
@@ -328,7 +314,7 @@ HAVE_SOCKADDR_SA_LEN
#define HAVE_DHCP
#endif
-#if defined(NO_SCRIPT) || defined(NO_FORK)
+#if defined(NO_SCRIPT)
#undef HAVE_SCRIPT
#undef HAVE_LUASCRIPT
#endif
@@ -372,9 +358,6 @@ static char *compile_opts =
#ifdef HAVE_BROKEN_RTC
"no-RTC "
#endif
-#ifdef NO_FORK
-"no-MMU "
-#endif
#ifndef HAVE_DBUS
"no-"
#endif
--- a/src/dnsmasq.c
+++ b/src/dnsmasq.c
@@ -485,7 +485,6 @@ int main (int argc, char **argv)
if (chdir("/") != 0)
die(_("cannot chdir to filesystem root: %s"), NULL, EC_MISC);
-#ifndef NO_FORK
if (!option_bool(OPT_NO_FORK))
{
pid_t pid;
@@ -525,7 +524,6 @@ int main (int argc, char **argv)
if (pid != 0)
_exit(0);
}
-#endif
/* write pidfile _after_ forking ! */
if (daemon->runfile)
@@ -1628,12 +1626,10 @@ static int set_dns_listeners(time_t now)
}
-#ifndef NO_FORK
if (!option_bool(OPT_DEBUG))
for (i = 0; i < MAX_PROCS; i++)
if (daemon->tcp_pipes[i] != -1)
poll_listen(daemon->tcp_pipes[i], POLLIN);
-#endif
return wait;
}
@@ -1643,9 +1639,7 @@ static void check_dns_listeners(time_t n
struct serverfd *serverfdp;
struct listener *listener;
int i;
-#ifndef NO_FORK
int pipefd[2];
-#endif
for (serverfdp = daemon->sfds; serverfdp; serverfdp = serverfdp->next)
if (poll_check(serverfdp->fd, POLLIN))
@@ -1657,7 +1651,6 @@ static void check_dns_listeners(time_t n
poll_check(daemon->randomsocks[i].fd, POLLIN))
reply_query(daemon->randomsocks[i].fd, daemon->randomsocks[i].family, now);
-#ifndef NO_FORK
/* Races. The child process can die before we read all of the data from the
pipe, or vice versa. Therefore send tcp_pids to zero when we wait() the
process, and tcp_pipes to -1 and close the FD when we read the last
@@ -1674,7 +1667,6 @@ static void check_dns_listeners(time_t n
close(daemon->tcp_pipes[i]);
daemon->tcp_pipes[i] = -1;
}
-#endif
for (listener = daemon->listeners; listener; listener = listener->next)
{
@@ -1768,7 +1760,6 @@ static void check_dns_listeners(time_t n
shutdown(confd, SHUT_RDWR);
while (retry_send(close(confd)));
}
-#ifndef NO_FORK
else if (!option_bool(OPT_DEBUG) && pipe(pipefd) == 0 && (p = fork()) != 0)
{
close(pipefd[1]); /* parent needs read pipe end. */
@@ -1791,7 +1782,6 @@ static void check_dns_listeners(time_t n
/* The child can use up to TCP_MAX_QUERIES ids, so skip that many. */
daemon->log_id += TCP_MAX_QUERIES;
}
-#endif
else
{
unsigned char *buff;
@@ -1811,7 +1801,6 @@ static void check_dns_listeners(time_t n
auth_dns = 0;
}
-#ifndef NO_FORK
/* Arrange for SIGALRM after CHILD_LIFETIME seconds to
terminate the process. */
if (!option_bool(OPT_DEBUG))
@@ -1820,7 +1809,6 @@ static void check_dns_listeners(time_t n
close(pipefd[0]); /* close read end in child. */
daemon->pipe_to_parent = pipefd[1];
}
-#endif
/* start with no upstream connections. */
for (s = daemon->servers; s; s = s->next)
@@ -1846,13 +1834,11 @@ static void check_dns_listeners(time_t n
shutdown(s->tcpfd, SHUT_RDWR);
while (retry_send(close(s->tcpfd)));
}
-#ifndef NO_FORK
if (!option_bool(OPT_DEBUG))
{
flush_log();
_exit(0);
}
-#endif
}
}
}
--- a/src/option.c
+++ b/src/option.c
@@ -1828,9 +1828,7 @@ static int one_opt(int option, char *arg
/* Sorry about the gross pre-processor abuse */
case '6': /* --dhcp-script */
case LOPT_LUASCRIPT: /* --dhcp-luascript */
-# if defined(NO_FORK)
- ret_err(_("cannot run scripts under uClinux"));
-# elif !defined(HAVE_SCRIPT)
+# if !defined(HAVE_SCRIPT)
ret_err(_("recompile with HAVE_SCRIPT defined to enable lease-change scripts"));
# else
if (option == LOPT_LUASCRIPT)

1199
package/network/services/dnsmasq/patches/0011-Free-config-file-values-on-parsing-errors.patch
View File

File diff suppressed because it is too large Load Diff

3
package/network/services/dnsmasq/patches/110-ipset-remove-old-kernel-support.patch
Unescape Escape View File

@ -44,7 +44,7 @@
(buffer = safe_malloc(BUFF_SZ)) &&
(ipset_sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_NETFILTER)) != -1 &&
(bind(ipset_sock, (struct sockaddr *)&snl, sizeof(snl)) != -1))
@@ -211,16 +192,9 @@ int add_to_ipset(const char *setname, co
@@ -217,17 +198,10 @@ int add_to_ipset(const char *setname, co
if (flags & F_IPV6)
{
af = AF_INET6;
@ -55,6 +55,7 @@
- ret = -1;
- }
}
#endif
- if (ret != -1)
- ret = old_kernel ? old_add_to_ipset(setname, ipaddr, remove) : new_add_to_ipset(setname, ipaddr, af, remove);

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