Module Name: src
Committed By: he
Date: Thu Dec 25 23:43:29 UTC 2014
Modified Files:
src/dist/bind/bin/named [netbsd-5-1]: config.c query.c server.c
src/dist/bind/lib/dns [netbsd-5-1]: adb.c resolver.c
src/dist/bind/lib/dns/include/dns [netbsd-5-1]: adb.h resolver.h
src/dist/bind/lib/export/isc [netbsd-5-1]: Makefile.in
src/dist/bind/lib/isc [netbsd-5-1]: Makefile.in
src/dist/bind/lib/isc/include/isc [netbsd-5-1]: Makefile.in types.h
src/dist/bind/lib/isccfg [netbsd-5-1]: namedconf.c
src/lib/libisc [netbsd-5-1]: Makefile
Added Files:
src/dist/bind/lib/isc [netbsd-5-1]: counter.c
src/dist/bind/lib/isc/include/isc [netbsd-5-1]: counter.h
Log Message:
Apply fix for BIND, backported from the patch for 9.8.8 from ISC.
This is a fix for CVE-2014-8500, where a maliciously constructed
setup can cause BIND to issue an unlimited sequence of queries to
follow a delegation.
[spz, ticket #1937]
To generate a diff of this commit:
cvs rdiff -u -r1.1.1.8.4.1.2.3 -r1.1.1.8.4.1.2.4 \
src/dist/bind/bin/named/config.c
cvs rdiff -u -r1.8.4.2.2.6 -r1.8.4.2.2.7 src/dist/bind/bin/named/query.c
cvs rdiff -u -r1.1.1.9.4.1.2.3 -r1.1.1.9.4.1.2.4 \
src/dist/bind/bin/named/server.c
cvs rdiff -u -r1.6.4.1.2.3 -r1.6.4.1.2.4 src/dist/bind/lib/dns/adb.c
cvs rdiff -u -r1.8.4.2.2.4 -r1.8.4.2.2.5 src/dist/bind/lib/dns/resolver.c
cvs rdiff -u -r1.1.1.5.12.3 -r1.1.1.5.12.4 \
src/dist/bind/lib/dns/include/dns/adb.h
cvs rdiff -u -r1.1.1.5.4.1.2.3 -r1.1.1.5.4.1.2.4 \
src/dist/bind/lib/dns/include/dns/resolver.h
cvs rdiff -u -r1.1.4.4 -r1.1.4.5 src/dist/bind/lib/export/isc/Makefile.in
cvs rdiff -u -r1.1.1.6.4.1.2.3 -r1.1.1.6.4.1.2.4 \
src/dist/bind/lib/isc/Makefile.in
cvs rdiff -u -r0 -r1.1.6.2 src/dist/bind/lib/isc/counter.c
cvs rdiff -u -r1.1.1.5.4.1.2.3 -r1.1.1.5.4.1.2.4 \
src/dist/bind/lib/isc/include/isc/Makefile.in \
src/dist/bind/lib/isc/include/isc/types.h
cvs rdiff -u -r0 -r1.1.6.2 src/dist/bind/lib/isc/include/isc/counter.h
cvs rdiff -u -r1.1.1.7.4.1.2.3 -r1.1.1.7.4.1.2.4 \
src/dist/bind/lib/isccfg/namedconf.c
cvs rdiff -u -r1.2.4.1.2.1 -r1.2.4.1.2.2 src/lib/libisc/Makefile
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/dist/bind/bin/named/config.c
diff -u src/dist/bind/bin/named/config.c:1.1.1.8.4.1.2.3 src/dist/bind/bin/named/config.c:1.1.1.8.4.1.2.4
--- src/dist/bind/bin/named/config.c:1.1.1.8.4.1.2.3 Wed Jul 25 12:09:57 2012
+++ src/dist/bind/bin/named/config.c Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: config.c,v 1.1.1.8.4.1.2.3 2012/07/25 12:09:57 jdc Exp $ */
+/* $NetBSD: config.c,v 1.1.1.8.4.1.2.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2010 Internet Systems Consortium, Inc. ("ISC")
@@ -75,6 +75,8 @@ options {\n\
listen-on {any;};\n\
listen-on-v6 {none;};\n\
match-mapped-addresses no;\n\
+ max-recursion-depth 7;\n\
+ max-recursion-queries 50;\n\
memstatistics-file \"named.memstats\";\n\
multiple-cnames no;\n\
# named-xfer <obsolete>;\n\
Index: src/dist/bind/bin/named/query.c
diff -u src/dist/bind/bin/named/query.c:1.8.4.2.2.6 src/dist/bind/bin/named/query.c:1.8.4.2.2.7
--- src/dist/bind/bin/named/query.c:1.8.4.2.2.6 Wed Jan 15 10:11:37 2014
+++ src/dist/bind/bin/named/query.c Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: query.c,v 1.8.4.2.2.6 2014/01/15 10:11:37 bouyer Exp $ */
+/* $NetBSD: query.c,v 1.8.4.2.2.7 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
@@ -3338,11 +3338,11 @@ query_recurse(ns_client_t *client, dns_r
peeraddr = &client->peeraddr;
else
peeraddr = NULL;
- result = dns_resolver_createfetch2(client->view->resolver,
+ result = dns_resolver_createfetch3(client->view->resolver,
client->query.qname,
qtype, qdomain, nameservers,
NULL, peeraddr, client->message->id,
- client->query.fetchoptions,
+ client->query.fetchoptions, 0, NULL,
client->task,
query_resume, client,
rdataset, sigrdataset,
Index: src/dist/bind/bin/named/server.c
diff -u src/dist/bind/bin/named/server.c:1.1.1.9.4.1.2.3 src/dist/bind/bin/named/server.c:1.1.1.9.4.1.2.4
--- src/dist/bind/bin/named/server.c:1.1.1.9.4.1.2.3 Wed Jul 25 12:10:02 2012
+++ src/dist/bind/bin/named/server.c Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: server.c,v 1.1.1.9.4.1.2.3 2012/07/25 12:10:02 jdc Exp $ */
+/* $NetBSD: server.c,v 1.1.1.9.4.1.2.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
@@ -1837,6 +1837,16 @@ configure_view(dns_view_t *view, cfg_obj
udpsize = 4096;
dns_resolver_setudpsize(view->resolver, (isc_uint16_t)udpsize);
+ obj = NULL;
+ result = ns_config_get(maps, "max-recursion-depth", &obj);
+ INSIST(result == ISC_R_SUCCESS);
+ dns_resolver_setmaxdepth(view->resolver, cfg_obj_asuint32(obj));
+
+ obj = NULL;
+ result = ns_config_get(maps, "max-recursion-queries", &obj);
+ INSIST(result == ISC_R_SUCCESS);
+ dns_resolver_setmaxqueries(view->resolver, cfg_obj_asuint32(obj));
+
/*
* Set the maximum UDP response size.
*/
Index: src/dist/bind/lib/dns/adb.c
diff -u src/dist/bind/lib/dns/adb.c:1.6.4.1.2.3 src/dist/bind/lib/dns/adb.c:1.6.4.1.2.4
--- src/dist/bind/lib/dns/adb.c:1.6.4.1.2.3 Wed Jul 25 12:12:58 2012
+++ src/dist/bind/lib/dns/adb.c Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: adb.c,v 1.6.4.1.2.3 2012/07/25 12:12:58 jdc Exp $ */
+/* $NetBSD: adb.c,v 1.6.4.1.2.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
@@ -202,6 +202,7 @@ struct dns_adbfetch {
unsigned int magic;
dns_fetch_t *fetch;
dns_rdataset_t rdataset;
+ unsigned int depth;
};
/*%
@@ -310,6 +311,7 @@ static void cancel_fetches_at_name(dns_a
static isc_result_t dbfind_name(dns_adbname_t *, isc_stdtime_t,
dns_rdatatype_t);
static isc_result_t fetch_name(dns_adbname_t *, isc_boolean_t,
+ unsigned int, isc_counter_t *,
dns_rdatatype_t);
static inline void check_exit(dns_adb_t *);
static void destroy(dns_adb_t *);
@@ -2282,6 +2284,19 @@ dns_adb_createfind(dns_adb_t *adb, isc_t
isc_stdtime_t now, dns_name_t *target,
in_port_t port, dns_adbfind_t **findp)
{
+ return (dns_adb_createfind2(adb, task, action, arg, name,
+ qname, qtype, options, now,
+ target, port, 0, NULL, findp));
+}
+
+isc_result_t
+dns_adb_createfind2(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
+ void *arg, dns_name_t *name, dns_name_t *qname,
+ dns_rdatatype_t qtype, unsigned int options,
+ isc_stdtime_t now, dns_name_t *target,
+ in_port_t port, unsigned int depth, isc_counter_t *qc,
+ dns_adbfind_t **findp)
+{
dns_adbfind_t *find;
dns_adbname_t *adbname;
int bucket;
@@ -2512,7 +2527,7 @@ dns_adb_createfind(dns_adb_t *adb, isc_t
* Start V4.
*/
if (WANT_INET(wanted_fetches) &&
- fetch_name(adbname, start_at_zone,
+ fetch_name(adbname, start_at_zone, depth, qc,
dns_rdatatype_a) == ISC_R_SUCCESS) {
DP(DEF_LEVEL,
"dns_adb_createfind: started A fetch for name %p",
@@ -2523,7 +2538,7 @@ dns_adb_createfind(dns_adb_t *adb, isc_t
* Start V6.
*/
if (WANT_INET6(wanted_fetches) &&
- fetch_name(adbname, start_at_zone,
+ fetch_name(adbname, start_at_zone, depth, qc,
dns_rdatatype_aaaa) == ISC_R_SUCCESS) {
DP(DEF_LEVEL,
"dns_adb_createfind: "
@@ -3256,6 +3271,12 @@ fetch_callback(isc_task_t *task, isc_eve
DP(DEF_LEVEL, "adb: fetch of '%s' %s failed: %s",
buf, address_type == DNS_ADBFIND_INET ? "A" : "AAAA",
dns_result_totext(dev->result));
+ /*
+ * Don't record a failure unless this is the initial
+ * fetch of a chain.
+ */
+ if (fetch->depth > 1)
+ goto out;
/* XXXMLG Don't pound on bad servers. */
if (address_type == DNS_ADBFIND_INET) {
name->expire_v4 = ISC_MIN(name->expire_v4, now + 300);
@@ -3295,6 +3316,7 @@ fetch_callback(isc_task_t *task, isc_eve
static isc_result_t
fetch_name(dns_adbname_t *adbname,
isc_boolean_t start_at_zone,
+ unsigned int depth, isc_counter_t *qc,
dns_rdatatype_t type)
{
isc_result_t result;
@@ -3341,9 +3363,11 @@ fetch_name(dns_adbname_t *adbname,
goto cleanup;
}
- result = dns_resolver_createfetch(adb->view->resolver, &adbname->name,
+ fetch->depth = depth;
+ result = dns_resolver_createfetch3(adb->view->resolver, &adbname->name,
type, name, nameservers, NULL,
- options, adb->task, fetch_callback,
+ NULL, 0, options, depth, qc,
+ adb->task, fetch_callback,
adbname, &fetch->rdataset, NULL,
&fetch->fetch);
if (result != ISC_R_SUCCESS)
Index: src/dist/bind/lib/dns/resolver.c
diff -u src/dist/bind/lib/dns/resolver.c:1.8.4.2.2.4 src/dist/bind/lib/dns/resolver.c:1.8.4.2.2.5
--- src/dist/bind/lib/dns/resolver.c:1.8.4.2.2.4 Wed Jul 25 12:13:08 2012
+++ src/dist/bind/lib/dns/resolver.c Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: resolver.c,v 1.8.4.2.2.4 2012/07/25 12:13:08 jdc Exp $ */
+/* $NetBSD: resolver.c,v 1.8.4.2.2.5 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
@@ -23,6 +23,7 @@
#include <config.h>
+#include <isc/counter.h>
#include <isc/platform.h>
#include <isc/print.h>
#include <isc/string.h>
@@ -107,6 +108,16 @@
#define QTRACE(m)
#endif
+/* The default maximum number of recursions to follow before giving up. */
+#ifndef DEFAULT_RECURSION_DEPTH
+#define DEFAULT_RECURSION_DEPTH 7
+#endif
+
+/* The default maximum number of iterative queries to allow before giving up. */
+#ifndef DEFAULT_MAX_QUERIES
+#define DEFAULT_MAX_QUERIES 50
+#endif
+
/*%
* Maximum EDNS0 input packet size.
*/
@@ -214,6 +225,7 @@ struct fetchctx {
dns_adb_t * adb;
isc_boolean_t ns_ttl_ok;
isc_uint32_t ns_ttl;
+ isc_counter_t * qc;
/*%
* The number of events we're waiting for.
@@ -281,6 +293,7 @@ struct fetchctx {
isc_boolean_t timeout;
dns_adbaddrinfo_t *addrinfo;
isc_sockaddr_t *client;
+ unsigned int depth;
};
#define FCTX_MAGIC ISC_MAGIC('F', '!', '!', '!')
@@ -392,6 +405,8 @@ struct dns_resolver {
unsigned int spillatmin;
isc_timer_t * spillattimer;
isc_boolean_t zero_no_soa_ttl;
+ unsigned int maxdepth;
+ unsigned int maxqueries;
/* Locked by lock. */
unsigned int references;
@@ -2179,9 +2194,9 @@ fctx_finddone(isc_task_t *task, isc_even
*/
INSIST(!SHUTTINGDOWN(fctx));
fctx->attributes &= ~FCTX_ATTR_ADDRWAIT;
- if (event->ev_type == DNS_EVENT_ADBMOREADDRESSES)
+ if (event->ev_type == DNS_EVENT_ADBMOREADDRESSES) {
want_try = ISC_TRUE;
- else {
+ } else {
fctx->findfail++;
if (fctx->pending == 0) {
/*
@@ -2210,10 +2225,10 @@ fctx_finddone(isc_task_t *task, isc_even
else if (want_done)
fctx_done(fctx, ISC_R_FAILURE, __LINE__);
else if (destroy) {
- fctx_destroy(fctx);
+ fctx_destroy(fctx);
if (bucket_empty)
- empty_bucket(res);
-}
+ empty_bucket(res);
+ }
}
@@ -2528,12 +2543,13 @@ findname(fetchctx_t *fctx, dns_name_t *n
* See what we know about this address.
*/
find = NULL;
- result = dns_adb_createfind(fctx->adb,
+ result = dns_adb_createfind2(fctx->adb,
res->buckets[fctx->bucketnum].task,
fctx_finddone, fctx, name,
&fctx->name, fctx->type,
options, now, NULL,
- res->view->dstport, &find);
+ res->view->dstport,
+ fctx->depth + 1, fctx->qc, &find);
if (result != ISC_R_SUCCESS) {
if (result == DNS_R_ALIAS) {
/*
@@ -2641,6 +2657,14 @@ fctx_getaddresses(fetchctx_t *fctx, isc_
res = fctx->res;
+ if (fctx->depth > res->maxdepth) {
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_RESOLVER,
+ DNS_LOGMODULE_RESOLVER, ISC_LOG_DEBUG(3),
+ "too much NS indirection resolving '%s'",
+ fctx->info);
+ return (DNS_R_SERVFAIL);
+ }
+
/*
* Forwarders.
*/
@@ -3116,6 +3140,16 @@ fctx_try(fetchctx_t *fctx, isc_boolean_t
}
}
+ result = isc_counter_increment(fctx->qc);
+ if (result != ISC_R_SUCCESS) {
+ isc_log_write(dns_lctx, DNS_LOGCATEGORY_RESOLVER,
+ DNS_LOGMODULE_RESOLVER, ISC_LOG_DEBUG(3),
+ "exceeded max queries resolving '%s'",
+ fctx->info);
+ fctx_done(fctx, DNS_R_SERVFAIL, __LINE__);
+ return;
+ }
+
result = fctx_query(fctx, addrinfo, fctx->options);
if (result != ISC_R_SUCCESS)
fctx_done(fctx, result, __LINE__);
@@ -3214,6 +3248,7 @@ fctx_destroy(fetchctx_t *fctx) {
isc_mem_put(fctx->mctx, sa, sizeof(*sa));
}
+ isc_counter_detach(&fctx->qc);
isc_timer_detach(&fctx->timer);
dns_message_destroy(&fctx->rmessage);
dns_message_destroy(&fctx->qmessage);
@@ -3542,7 +3577,8 @@ log_ns_ttl(fetchctx_t *fctx, const char
static isc_result_t
fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
dns_name_t *domain, dns_rdataset_t *nameservers,
- unsigned int options, unsigned int bucketnum, fetchctx_t **fctxp)
+ unsigned int options, unsigned int bucketnum, unsigned int depth,
+ isc_counter_t *qc, fetchctx_t **fctxp)
{
fetchctx_t *fctx;
isc_result_t result;
@@ -3564,6 +3600,21 @@ fctx_create(dns_resolver_t *res, dns_nam
fctx = isc_mem_get(mctx, sizeof(*fctx));
if (fctx == NULL)
return (ISC_R_NOMEMORY);
+
+ fctx->qc = NULL;
+ if (qc != NULL) {
+ isc_counter_attach(qc, &fctx->qc);
+ } else {
+ result = isc_counter_create(res->mctx,
+ res->maxqueries, &fctx->qc);
+ if (result != ISC_R_SUCCESS)
+ goto cleanup_counter;
+ }
+
+ /*
+ * Make fctx->info point to a copy of a formatted string
+ * "name/type".
+ */
dns_name_format(name, buf, sizeof(buf));
dns_rdatatype_format(type, typebuf, sizeof(typebuf));
strcat(buf, "/"); /* checked */
@@ -3594,6 +3645,7 @@ fctx_create(dns_resolver_t *res, dns_nam
fctx->state = fetchstate_init;
fctx->want_shutdown = ISC_FALSE;
fctx->cloned = ISC_FALSE;
+ fctx->depth = depth;
ISC_LIST_INIT(fctx->queries);
ISC_LIST_INIT(fctx->finds);
ISC_LIST_INIT(fctx->altfinds);
@@ -3799,6 +3851,9 @@ fctx_create(dns_resolver_t *res, dns_nam
cleanup_info:
isc_mem_free(mctx, fctx->info);
+ cleanup_counter:
+ isc_counter_detach(&fctx->qc);
+
cleanup_fetch:
isc_mem_put(mctx, fctx, sizeof(*fctx));
@@ -5510,7 +5565,7 @@ noanswer_response(fetchctx_t *fctx, dns_
char qbuf[DNS_NAME_FORMATSIZE];
char nbuf[DNS_NAME_FORMATSIZE];
char tbuf[DNS_RDATATYPE_FORMATSIZE];
- dns_rdatatype_format(fctx->type, tbuf,
+ dns_rdatatype_format(type, tbuf,
sizeof(tbuf));
dns_name_format(name, nbuf,
sizeof(nbuf));
@@ -5519,7 +5574,7 @@ noanswer_response(fetchctx_t *fctx, dns_
log_formerr(fctx,
"unrelated %s %s in "
"%s authority section",
- tbuf, qbuf, nbuf);
+ tbuf, nbuf, qbuf);
return (DNS_R_FORMERR);
}
if (type == dns_rdatatype_ns) {
@@ -7560,6 +7615,8 @@ dns_resolver_create(dns_view_t *view,
res->zero_no_soa_ttl = ISC_FALSE;
res->ndisps = 0;
res->nextdisp = 0; /* meaningless at this point, but init it */
+ res->maxdepth = DEFAULT_RECURSION_DEPTH;
+ res->maxqueries = DEFAULT_MAX_QUERIES;
res->nbuckets = ntasks;
res->activebuckets = ntasks;
res->buckets = isc_mem_get(view->mctx,
@@ -7999,9 +8056,9 @@ dns_resolver_createfetch(dns_resolver_t
dns_rdataset_t *sigrdataset,
dns_fetch_t **fetchp)
{
- return (dns_resolver_createfetch2(res, name, type, domain,
+ return (dns_resolver_createfetch3(res, name, type, domain,
nameservers, forwarders, NULL, 0,
- options, task, action, arg,
+ options, 0, NULL, task, action, arg,
rdataset, sigrdataset, fetchp));
}
@@ -8017,6 +8074,25 @@ dns_resolver_createfetch2(dns_resolver_t
dns_rdataset_t *sigrdataset,
dns_fetch_t **fetchp)
{
+ return (dns_resolver_createfetch3(res, name, type, domain,
+ nameservers, forwarders, client, id,
+ options, 0, NULL, task, action, arg,
+ rdataset, sigrdataset, fetchp));
+}
+
+isc_result_t
+dns_resolver_createfetch3(dns_resolver_t *res, dns_name_t *name,
+ dns_rdatatype_t type,
+ dns_name_t *domain, dns_rdataset_t *nameservers,
+ dns_forwarders_t *forwarders,
+ isc_sockaddr_t *client, dns_messageid_t id,
+ unsigned int options, unsigned int depth,
+ isc_counter_t *qc, isc_task_t *task,
+ isc_taskaction_t action, void *arg,
+ dns_rdataset_t *rdataset,
+ dns_rdataset_t *sigrdataset,
+ dns_fetch_t **fetchp)
+{
dns_fetch_t *fetch;
fetchctx_t *fctx = NULL;
isc_result_t result = ISC_R_SUCCESS;
@@ -8103,11 +8179,12 @@ dns_resolver_createfetch2(dns_resolver_t
if (fctx == NULL) {
result = fctx_create(res, name, type, domain, nameservers,
- options, bucketnum, &fctx);
+ options, bucketnum, depth, qc, &fctx);
if (result != ISC_R_SUCCESS)
goto unlock;
new_fctx = ISC_TRUE;
- }
+ } else if (fctx->depth > depth)
+ fctx->depth = depth;
result = fctx_join(fctx, task, client, id, action, arg,
rdataset, sigrdataset, fetch);
@@ -8858,3 +8935,28 @@ dns_resolver_getoptions(dns_resolver_t *
return (resolver->options);
}
+
+void
+dns_resolver_setmaxdepth(dns_resolver_t *resolver, unsigned int maxdepth) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ resolver->maxdepth = maxdepth;
+}
+
+unsigned int
+dns_resolver_getmaxdepth(dns_resolver_t *resolver) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ return (resolver->maxdepth);
+}
+
+void
+dns_resolver_setmaxqueries(dns_resolver_t *resolver, unsigned int queries) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ resolver->maxqueries = queries;
+}
+
+unsigned int
+dns_resolver_getmaxqueries(dns_resolver_t *resolver) {
+ REQUIRE(VALID_RESOLVER(resolver));
+ return (resolver->maxqueries);
+}
+
Index: src/dist/bind/lib/dns/include/dns/adb.h
diff -u src/dist/bind/lib/dns/include/dns/adb.h:1.1.1.5.12.3 src/dist/bind/lib/dns/include/dns/adb.h:1.1.1.5.12.4
--- src/dist/bind/lib/dns/include/dns/adb.h:1.1.1.5.12.3 Wed Jul 25 12:13:13 2012
+++ src/dist/bind/lib/dns/include/dns/adb.h Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: adb.h,v 1.1.1.5.12.3 2012/07/25 12:13:13 jdc Exp $ */
+/* $NetBSD: adb.h,v 1.1.1.5.12.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2008, 2011, 2012 Internet Systems Consortium, Inc. ("ISC")
@@ -336,6 +336,13 @@ dns_adb_createfind(dns_adb_t *adb, isc_t
dns_rdatatype_t qtype, unsigned int options,
isc_stdtime_t now, dns_name_t *target,
in_port_t port, dns_adbfind_t **find);
+isc_result_t
+dns_adb_createfind2(dns_adb_t *adb, isc_task_t *task, isc_taskaction_t action,
+ void *arg, dns_name_t *name, dns_name_t *qname,
+ dns_rdatatype_t qtype, unsigned int options,
+ isc_stdtime_t now, dns_name_t *target, in_port_t port,
+ unsigned int depth, isc_counter_t *qc,
+ dns_adbfind_t **find);
/*%<
* Main interface for clients. The adb will look up the name given in
* "name" and will build up a list of found addresses, and perhaps start
Index: src/dist/bind/lib/dns/include/dns/resolver.h
diff -u src/dist/bind/lib/dns/include/dns/resolver.h:1.1.1.5.4.1.2.3 src/dist/bind/lib/dns/include/dns/resolver.h:1.1.1.5.4.1.2.4
--- src/dist/bind/lib/dns/include/dns/resolver.h:1.1.1.5.4.1.2.3 Wed Jul 25 12:13:21 2012
+++ src/dist/bind/lib/dns/include/dns/resolver.h Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: resolver.h,v 1.1.1.5.4.1.2.3 2012/07/25 12:13:21 jdc Exp $ */
+/* $NetBSD: resolver.h,v 1.1.1.5.4.1.2.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2010, 2012 Internet Systems Consortium, Inc. ("ISC")
@@ -273,6 +273,18 @@ dns_resolver_createfetch2(dns_resolver_t
dns_rdataset_t *rdataset,
dns_rdataset_t *sigrdataset,
dns_fetch_t **fetchp);
+isc_result_t
+dns_resolver_createfetch3(dns_resolver_t *res, dns_name_t *name,
+ dns_rdatatype_t type,
+ dns_name_t *domain, dns_rdataset_t *nameservers,
+ dns_forwarders_t *forwarders,
+ isc_sockaddr_t *client, isc_uint16_t id,
+ unsigned int options, unsigned int depth,
+ isc_counter_t *qc, isc_task_t *task,
+ isc_taskaction_t action, void *arg,
+ dns_rdataset_t *rdataset,
+ dns_rdataset_t *sigrdataset,
+ dns_fetch_t **fetchp);
/*%<
* Recurse to answer a question.
*
@@ -553,6 +565,30 @@ dns_resolver_printbadcache(dns_resolver_
* \li resolver to be valid.
*/
+void
+dns_resolver_setmaxdepth(dns_resolver_t *resolver, unsigned int maxdepth);
+unsigned int
+dns_resolver_getmaxdepth(dns_resolver_t *resolver);
+/*%
+ * Get and set how many NS indirections will be followed when looking for
+ * nameserver addresses.
+ *
+ * Requires:
+ * \li resolver to be valid.
+ */
+
+void
+dns_resolver_setmaxqueries(dns_resolver_t *resolver, unsigned int queries);
+unsigned int
+dns_resolver_getmaxqueries(dns_resolver_t *resolver);
+/*%
+ * Get and set how many iterative queries will be allowed before
+ * terminating a recursive query.
+ *
+ * Requires:
+ * \li resolver to be valid.
+ */
+
ISC_LANG_ENDDECLS
#endif /* DNS_RESOLVER_H */
Index: src/dist/bind/lib/export/isc/Makefile.in
diff -u src/dist/bind/lib/export/isc/Makefile.in:1.1.4.4 src/dist/bind/lib/export/isc/Makefile.in:1.1.4.5
--- src/dist/bind/lib/export/isc/Makefile.in:1.1.4.4 Wed Jul 25 12:13:45 2012
+++ src/dist/bind/lib/export/isc/Makefile.in Thu Dec 25 23:43:29 2014
@@ -63,7 +63,7 @@ WIN32OBJS = win32/condition.@O@ win32/d
# Alphabetically
OBJS = @ISC_EXTRA_OBJS@ \
assertions.@O@ backtrace.@O@ backtrace-emptytbl.@O@ base32.@O@ \
- base64.@O@ buffer.@O@ bufferlist.@O@ \
+ base64.@O@ buffer.@O@ bufferlist.@O@ counter.@O@ \
error.@O@ event.@O@ \
hash.@O@ hex.@O@ hmacmd5.@O@ hmacsha.@O@ \
inet_aton.@O@ iterated_hash.@O@ lex.@O@ lfsr.@O@ log.@O@ \
@@ -86,7 +86,7 @@ ISCDRIVERSRCS = mem.c task.c lib.c timer
SRCS = @ISC_EXTRA_SRCS@ \
assertions.c backtrace.c backtrace-emptytbl.c base32.c \
- base64.c buffer.c bufferlist.c \
+ base64.c buffer.c bufferlist.c counter.c \
error.c event.c \
hash.c hex.c hmacmd5.c hmacsha.c \
inet_aton.c iterated_hash.c lex.c log.c lfsr.c \
Index: src/dist/bind/lib/isc/Makefile.in
diff -u src/dist/bind/lib/isc/Makefile.in:1.1.1.6.4.1.2.3 src/dist/bind/lib/isc/Makefile.in:1.1.1.6.4.1.2.4
--- src/dist/bind/lib/isc/Makefile.in:1.1.1.6.4.1.2.3 Wed Jul 25 12:13:53 2012
+++ src/dist/bind/lib/isc/Makefile.in Thu Dec 25 23:43:29 2014
@@ -53,7 +53,7 @@ WIN32OBJS = win32/condition.@O@ win32/d
OBJS = @ISC_EXTRA_OBJS@ \
assertions.@O@ backtrace.@O@ base32.@O@ base64.@O@ \
bitstring.@O@ buffer.@O@ bufferlist.@O@ commandline.@O@ \
- error.@O@ event.@O@ \
+ counter.@O error.@O@ event.@O@ \
hash.@O@ heap.@O@ hex.@O@ hmacmd5.@O@ hmacsha.@O@ \
httpd.@O@ inet_aton.@O@ iterated_hash.@O@ \
lex.@O@ lfsr.@O@ lib.@O@ log.@O@ \
@@ -69,7 +69,7 @@ SYMTBLOBJS = backtrace-emptytbl.@O@
# Alphabetically
SRCS = @ISC_EXTRA_SRCS@ \
assertions.c backtrace.c base32.c base64.c bitstring.c \
- buffer.c bufferlist.c commandline.c error.c event.c \
+ buffer.c bufferlist.c commandline.c counter.c error.c event.c \
heap.c hex.c hmacmd5.c hmacsha.c \
httpd.c inet_aton.c iterated_hash.c \
lex.c lfsr.c lib.c log.c \
Index: src/dist/bind/lib/isc/include/isc/Makefile.in
diff -u src/dist/bind/lib/isc/include/isc/Makefile.in:1.1.1.5.4.1.2.3 src/dist/bind/lib/isc/include/isc/Makefile.in:1.1.1.5.4.1.2.4
--- src/dist/bind/lib/isc/include/isc/Makefile.in:1.1.1.5.4.1.2.3 Wed Jul 25 12:14:07 2012
+++ src/dist/bind/lib/isc/include/isc/Makefile.in Thu Dec 25 23:43:29 2014
@@ -27,7 +27,8 @@ top_srcdir = @top_srcdir@
# install target below.
#
HEADERS = app.h assertions.h base64.h bind9.h bitstring.h boolean.h \
- buffer.h bufferlist.h commandline.h entropy.h error.h event.h \
+ buffer.h bufferlist.h commandline.h counter.h \
+ entropy.h error.h event.h \
eventclass.h file.h formatcheck.h fsaccess.h \
hash.h heap.h hex.h hmacmd5.h hmacsha.h \
httpd.h \
Index: src/dist/bind/lib/isc/include/isc/types.h
diff -u src/dist/bind/lib/isc/include/isc/types.h:1.1.1.5.4.1.2.3 src/dist/bind/lib/isc/include/isc/types.h:1.1.1.5.4.1.2.4
--- src/dist/bind/lib/isc/include/isc/types.h:1.1.1.5.4.1.2.3 Wed Jul 25 12:14:17 2012
+++ src/dist/bind/lib/isc/include/isc/types.h Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: types.h,v 1.1.1.5.4.1.2.3 2012/07/25 12:14:17 jdc Exp $ */
+/* $NetBSD: types.h,v 1.1.1.5.4.1.2.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
@@ -52,6 +52,7 @@ typedef struct isc_buffer isc_buffer_t;
typedef ISC_LIST(isc_buffer_t) isc_bufferlist_t; /*%< Buffer List */
typedef struct isc_constregion isc_constregion_t; /*%< Const region */
typedef struct isc_consttextregion isc_consttextregion_t; /*%< Const Text Region */
+typedef struct isc_counter isc_counter_t; /*%< Counter */
typedef struct isc_entropy isc_entropy_t; /*%< Entropy */
typedef struct isc_entropysource isc_entropysource_t; /*%< Entropy Source */
typedef struct isc_event isc_event_t; /*%< Event */
Index: src/dist/bind/lib/isccfg/namedconf.c
diff -u src/dist/bind/lib/isccfg/namedconf.c:1.1.1.7.4.1.2.3 src/dist/bind/lib/isccfg/namedconf.c:1.1.1.7.4.1.2.4
--- src/dist/bind/lib/isccfg/namedconf.c:1.1.1.7.4.1.2.3 Wed Jul 25 12:14:42 2012
+++ src/dist/bind/lib/isccfg/namedconf.c Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: namedconf.c,v 1.1.1.7.4.1.2.3 2012/07/25 12:14:42 jdc Exp $ */
+/* $NetBSD: namedconf.c,v 1.1.1.7.4.1.2.4 2014/12/25 23:43:29 he Exp $ */
/*
* Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
@@ -1051,6 +1051,8 @@ view_clauses[] = {
{ "max-cache-ttl", &cfg_type_uint32, 0 },
{ "max-clients-per-query", &cfg_type_uint32, 0 },
{ "max-ncache-ttl", &cfg_type_uint32, 0 },
+ { "max-recursion-depth", &cfg_type_uint32, 0 },
+ { "max-recursion-queries", &cfg_type_uint32, 0 },
{ "max-udp-size", &cfg_type_uint32, 0 },
{ "min-roots", &cfg_type_uint32, CFG_CLAUSEFLAG_NOTIMP },
{ "minimal-responses", &cfg_type_boolean, 0 },
Index: src/lib/libisc/Makefile
diff -u src/lib/libisc/Makefile:1.2.4.1.2.1 src/lib/libisc/Makefile:1.2.4.1.2.2
--- src/lib/libisc/Makefile:1.2.4.1.2.1 Sun Jan 9 20:43:29 2011
+++ src/lib/libisc/Makefile Thu Dec 25 23:43:29 2014
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.2.4.1.2.1 2011/01/09 20:43:29 riz Exp $
+# $NetBSD: Makefile,v 1.2.4.1.2.2 2014/12/25 23:43:29 he Exp $
LIB=isc
@@ -23,7 +23,7 @@ NLS_SRCS= msgcat.c
PTHREAD_SRCS= condition.c mutex.c thread.c
SRCS= assertions.c base32.c base64.c bitstring.c buffer.c \
- bufferlist.c commandline.c error.c event.c \
+ bufferlist.c commandline.c counter.c error.c event.c \
hash.c heap.c hex.c hmacmd5.c hmacsha.c httpd.c inet_aton.c \
iterated_hash.c lex.c lfsr.c lib.c log.c md5.c mem.c \
mutexblock.c netaddr.c netscope.c ondestroy.c parseint.c \
Added files:
Index: src/dist/bind/lib/isc/counter.c
diff -u /dev/null src/dist/bind/lib/isc/counter.c:1.1.6.2
--- /dev/null Thu Dec 25 23:43:30 2014
+++ src/dist/bind/lib/isc/counter.c Thu Dec 25 23:43:29 2014
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <stddef.h>
+
+#include <isc/counter.h>
+#include <isc/magic.h>
+#include <isc/mem.h>
+#include <isc/util.h>
+
+#define COUNTER_MAGIC ISC_MAGIC('C', 'n', 't', 'r')
+#define VALID_COUNTER(r) ISC_MAGIC_VALID(r, COUNTER_MAGIC)
+
+struct isc_counter {
+ unsigned int magic;
+ isc_mem_t *mctx;
+ isc_mutex_t lock;
+ unsigned int references;
+ unsigned int limit;
+ unsigned int used;
+};
+
+isc_result_t
+isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp) {
+ isc_result_t result;
+ isc_counter_t *counter;
+
+ REQUIRE(counterp != NULL && *counterp == NULL);
+
+ counter = isc_mem_get(mctx, sizeof(*counter));
+ if (counter == NULL)
+ return (ISC_R_NOMEMORY);
+
+ result = isc_mutex_init(&counter->lock);
+ if (result != ISC_R_SUCCESS) {
+ isc_mem_put(mctx, counter, sizeof(*counter));
+ return (result);
+ }
+
+ counter->mctx = NULL;
+ isc_mem_attach(mctx, &counter->mctx);
+
+ counter->references = 1;
+ counter->limit = limit;
+ counter->used = 0;
+
+ counter->magic = COUNTER_MAGIC;
+ *counterp = counter;
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_counter_increment(isc_counter_t *counter) {
+ isc_result_t result = ISC_R_SUCCESS;
+
+ LOCK(&counter->lock);
+ counter->used++;
+ if (counter->limit != 0 && counter->used >= counter->limit)
+ result = ISC_R_QUOTA;
+ UNLOCK(&counter->lock);
+
+ return (result);
+}
+
+unsigned int
+isc_counter_used(isc_counter_t *counter) {
+ REQUIRE(VALID_COUNTER(counter));
+
+ return (counter->used);
+}
+
+void
+isc_counter_setlimit(isc_counter_t *counter, int limit) {
+ REQUIRE(VALID_COUNTER(counter));
+
+ LOCK(&counter->lock);
+ counter->limit = limit;
+ UNLOCK(&counter->lock);
+}
+
+void
+isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp) {
+ REQUIRE(VALID_COUNTER(source));
+ REQUIRE(targetp != NULL && *targetp == NULL);
+
+ LOCK(&source->lock);
+ source->references++;
+ INSIST(source->references > 0);
+ UNLOCK(&source->lock);
+
+ *targetp = source;
+}
+
+static void
+destroy(isc_counter_t *counter) {
+ counter->magic = 0;
+ isc_mutex_destroy(&counter->lock);
+ isc_mem_putanddetach(&counter->mctx, counter, sizeof(*counter));
+}
+
+void
+isc_counter_detach(isc_counter_t **counterp) {
+ isc_counter_t *counter;
+ isc_boolean_t want_destroy = ISC_FALSE;
+
+ REQUIRE(counterp != NULL && *counterp != NULL);
+ counter = *counterp;
+ REQUIRE(VALID_COUNTER(counter));
+
+ *counterp = NULL;
+
+ LOCK(&counter->lock);
+ INSIST(counter->references > 0);
+ counter->references--;
+ if (counter->references == 0)
+ want_destroy = ISC_TRUE;
+ UNLOCK(&counter->lock);
+
+ if (want_destroy)
+ destroy(counter);
+}
Index: src/dist/bind/lib/isc/include/isc/counter.h
diff -u /dev/null src/dist/bind/lib/isc/include/isc/counter.h:1.1.6.2
--- /dev/null Thu Dec 25 23:43:30 2014
+++ src/dist/bind/lib/isc/include/isc/counter.h Thu Dec 25 23:43:29 2014
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef ISC_COUNTER_H
+#define ISC_COUNTER_H 1
+
+/*****
+ ***** Module Info
+ *****/
+
+/*! \file isc/counter.h
+ *
+ * \brief The isc_counter_t object is a simplified version of the
+ * isc_quota_t object; it tracks the consumption of limited
+ * resources, returning an error condition when the quota is
+ * exceeded. However, unlike isc_quota_t, attaching and detaching
+ * from a counter object does not increment or decrement the counter.
+ */
+
+/***
+ *** Imports.
+ ***/
+
+#include <isc/lang.h>
+#include <isc/mutex.h>
+#include <isc/types.h>
+
+/*****
+ ***** Types.
+ *****/
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp);
+/*%<
+ * Allocate and initialize a counter object.
+ */
+
+isc_result_t
+isc_counter_increment(isc_counter_t *counter);
+/*%<
+ * Increment the counter.
+ *
+ * If the counter limit is nonzero and has been reached, then
+ * return ISC_R_QUOTA, otherwise ISC_R_SUCCESS. (The counter is
+ * incremented regardless of return value.)
+ */
+
+unsigned int
+isc_counter_used(isc_counter_t *counter);
+/*%<
+ * Return the current counter value.
+ */
+
+void
+isc_counter_setlimit(isc_counter_t *counter, int limit);
+/*%<
+ * Set the counter limit.
+ */
+
+void
+isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp);
+/*%<
+ * Attach to a counter object, increasing its reference counter.
+ */
+
+void
+isc_counter_detach(isc_counter_t **counterp);
+/*%<
+ * Detach (and destroy if reference counter has dropped to zero)
+ * a counter object.
+ */
+
+ISC_LANG_ENDDECLS
+
+#endif /* ISC_COUNTER_H */
+
