-/*
+/*
Unix SMB/CIFS implementation.
DNS utility library
Copyright (C) Gerald (Jerry) Carter 2006.
+ Copyright (C) Jeremy Allison 2007.
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; either version 3 of the License, or
(at your option) any later version.
-
+
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/>.
*/
#if !defined(T_A) /* AIX 5.3 already defines T_A */
# define T_A ns_t_a
#endif
+
+#if defined(HAVE_IPV6)
+#if !defined(T_AAAA)
+# define T_AAAA ns_t_aaaa
+#endif
+#endif
+
# define T_SRV ns_t_srv
#if !defined(T_NS) /* AIX 5.3 already defines T_NS */
# define T_NS ns_t_ns
int namelen;
ZERO_STRUCTP( q );
-
+
if ( !start || !end || !q || !*ptr)
return False;
rr->in_class = RSVAL(p, 2);
rr->ttl = RIVAL(p, 4);
rr->rdatalen = RSVAL(p, 8);
-
+
p += 10;
/* sanity check the available space */
if ( !start || !end || !srv || !*ptr)
return -1;
- /* Parse the RR entry. Coming out of the this, ptr is at the beginning
+ /* Parse the RR entry. Coming out of the this, ptr is at the beginning
of the next record */
if ( !ads_dns_parse_rr( ctx, start, end, ptr, &rr ) ) {
}
if ( rr.type != T_SRV ) {
- DEBUG(1,("ads_dns_parse_rr_srv: Bad answer type (%d)\n", rr.type));
+ DEBUG(1,("ads_dns_parse_rr_srv: Bad answer type (%d)\n",
+ rr.type));
return False;
}
if ( !start || !end || !nsrec || !*ptr)
return -1;
- /* Parse the RR entry. Coming out of the this, ptr is at the beginning
+ /* Parse the RR entry. Coming out of the this, ptr is at the beginning
of the next record */
if ( !ads_dns_parse_rr( ctx, start, end, ptr, &rr ) ) {
}
if ( rr.type != T_NS ) {
- DEBUG(1,("ads_dns_parse_rr_ns: Bad answer type (%d)\n", rr.type));
+ DEBUG(1,("ads_dns_parse_rr_ns: Bad answer type (%d)\n",
+ rr.type));
return False;
}
p = rr.rdata;
/* ame server hostname */
-
+
namelen = dn_expand( start, end, p, nsname, sizeof(nsname) );
if ( namelen < 0 ) {
DEBUG(1,("ads_dns_parse_rr_ns: Failed to uncompress name!\n"));
if ( a->priority == b->priority ) {
/* randomize entries with an equal weight and priority */
- if ( a->weight == b->weight )
+ if ( a->weight == b->weight )
return 0;
- /* higher weights should be sorted lower */
+ /* higher weights should be sorted lower */
if ( a->weight > b->weight )
return -1;
else
return 1;
}
-
+
if ( a->priority < b->priority )
return -1;
#define DNS_FAILED_WAITTIME 30
-static NTSTATUS dns_send_req( TALLOC_CTX *ctx, const char *name, int q_type,
+static NTSTATUS dns_send_req( TALLOC_CTX *ctx, const char *name, int q_type,
uint8 **buf, int *resp_length )
{
uint8 *buffer = NULL;
size_t buf_len;
- int resp_len = NS_PACKETSZ;
+ int resp_len = NS_PACKETSZ;
static time_t last_dns_check = 0;
- static NTSTATUS last_dns_status = NT_STATUS_OK;
+ static NTSTATUS last_dns_status = NT_STATUS_OK;
time_t now = time(NULL);
/* Try to prevent bursts of DNS lookups if the server is down */
if ( last_dns_check > now )
last_dns_check = 0;
- /* IF we had a DNS timeout or a bad server and we are still
- in the 30 second cache window, just return the previous
+ /* IF we had a DNS timeout or a bad server and we are still
+ in the 30 second cache window, just return the previous
status and save the network timeout. */
if ( (NT_STATUS_EQUAL(last_dns_status,NT_STATUS_IO_TIMEOUT) ||
NT_STATUS_EQUAL(last_dns_status,NT_STATUS_CONNECTION_REFUSED)) &&
- (last_dns_check+DNS_FAILED_WAITTIME) > now )
+ (last_dns_check+DNS_FAILED_WAITTIME) > now )
{
DEBUG(10,("last_dns_check: Returning cached status (%s)\n",
nt_errstr(last_dns_status) ));
do {
if ( buffer )
TALLOC_FREE( buffer );
-
+
buf_len = resp_len * sizeof(uint8);
- if (buf_len) {
- if ( (buffer = TALLOC_ARRAY(ctx, uint8, buf_len)) == NULL ) {
- DEBUG(0,("ads_dns_lookup_srv: talloc() failed!\n"));
+ if (buf_len) {
+ if ((buffer = TALLOC_ARRAY(ctx, uint8, buf_len))
+ == NULL ) {
+ DEBUG(0,("ads_dns_lookup_srv: "
+ "talloc() failed!\n"));
last_dns_status = NT_STATUS_NO_MEMORY;
last_dns_check = time(NULL);
- return last_dns_status;
+ return last_dns_status;
}
}
- if ( (resp_len = res_query(name, C_IN, q_type, buffer, buf_len)) < 0 ) {
- DEBUG(3,("ads_dns_lookup_srv: Failed to resolve %s (%s)\n", name, strerror(errno)));
+ if ((resp_len = res_query(name, C_IN, q_type, buffer, buf_len))
+ < 0 ) {
+ DEBUG(3,("ads_dns_lookup_srv: "
+ "Failed to resolve %s (%s)\n",
+ name, strerror(errno)));
TALLOC_FREE( buffer );
last_dns_status = NT_STATUS_UNSUCCESSFUL;
-
+
if (errno == ETIMEDOUT) {
- last_dns_status = NT_STATUS_IO_TIMEOUT;
+ last_dns_status = NT_STATUS_IO_TIMEOUT;
}
if (errno == ECONNREFUSED) {
- last_dns_status = NT_STATUS_CONNECTION_REFUSED;
+ last_dns_status = NT_STATUS_CONNECTION_REFUSED;
}
last_dns_check = time(NULL);
return last_dns_status;
}
} while ( buf_len < resp_len && resp_len < MAX_DNS_PACKET_SIZE );
-
+
*buf = buffer;
*resp_length = resp_len;
last_dns_check = time(NULL);
- last_dns_status = NT_STATUS_OK;
+ last_dns_status = NT_STATUS_OK;
return last_dns_status;
}
Simple wrapper for a DNS SRV query
*********************************************************************/
-static NTSTATUS ads_dns_lookup_srv( TALLOC_CTX *ctx, const char *name, struct dns_rr_srv **dclist, int *numdcs )
+static NTSTATUS ads_dns_lookup_srv( TALLOC_CTX *ctx,
+ const char *name,
+ struct dns_rr_srv **dclist,
+ int *numdcs)
{
uint8 *buffer = NULL;
int resp_len = 0;
if ( !ctx || !name || !dclist ) {
return NT_STATUS_INVALID_PARAMETER;
}
-
- /* Send the request. May have to loop several times in case
+
+ /* Send the request. May have to loop several times in case
of large replies */
status = dns_send_req( ctx, name, T_SRV, &buffer, &resp_len );
available in libresolv.a, and not the shared lib. Who knows why....
So we have to parse the DNS reply ourselves */
- /* Pull the answer RR's count from the header. Use the NMB ordering macros */
+ /* Pull the answer RR's count from the header.
+ * Use the NMB ordering macros */
query_count = RSVAL( p, 4 );
answer_count = RSVAL( p, 6 );
auth_count = RSVAL( p, 8 );
additional_count = RSVAL( p, 10 );
- DEBUG(4,("ads_dns_lookup_srv: %d records returned in the answer section.\n",
+ DEBUG(4,("ads_dns_lookup_srv: "
+ "%d records returned in the answer section.\n",
answer_count));
-
+
if (answer_count) {
- if ( (dcs = TALLOC_ZERO_ARRAY(ctx, struct dns_rr_srv, answer_count)) == NULL ) {
- DEBUG(0,("ads_dns_lookup_srv: talloc() failure for %d char*'s\n",
+ if ((dcs = TALLOC_ZERO_ARRAY(ctx, struct dns_rr_srv,
+ answer_count)) == NULL ) {
+ DEBUG(0,("ads_dns_lookup_srv: "
+ "talloc() failure for %d char*'s\n",
answer_count));
return NT_STATUS_NO_MEMORY;
}
for ( rrnum=0; rrnum<query_count; rrnum++ ) {
struct dns_query q;
- if ( !ads_dns_parse_query( ctx, buffer, buffer+resp_len, &p, &q ) ) {
- DEBUG(1,("ads_dns_lookup_srv: Failed to parse query record!\n"));
+ if (!ads_dns_parse_query(ctx, buffer,
+ buffer+resp_len, &p, &q)) {
+ DEBUG(1,("ads_dns_lookup_srv: "
+ "Failed to parse query record!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
}
/* now we are at the answer section */
for ( rrnum=0; rrnum<answer_count; rrnum++ ) {
- if ( !ads_dns_parse_rr_srv( ctx, buffer, buffer+resp_len, &p, &dcs[rrnum] ) ) {
- DEBUG(1,("ads_dns_lookup_srv: Failed to parse answer record!\n"));
+ if (!ads_dns_parse_rr_srv(ctx, buffer, buffer+resp_len,
+ &p, &dcs[rrnum])) {
+ DEBUG(1,("ads_dns_lookup_srv: "
+ "Failed to parse answer record!\n"));
return NT_STATUS_UNSUCCESSFUL;
- }
+ }
}
idx = rrnum;
for ( rrnum=0; rrnum<auth_count; rrnum++ ) {
struct dns_rr rr;
- if ( !ads_dns_parse_rr( ctx, buffer, buffer+resp_len, &p, &rr ) ) {
- DEBUG(1,("ads_dns_lookup_srv: Failed to parse authority record!\n"));
+ if (!ads_dns_parse_rr( ctx, buffer,
+ buffer+resp_len, &p, &rr)) {
+ DEBUG(1,("ads_dns_lookup_srv: "
+ "Failed to parse authority record!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
}
struct dns_rr rr;
int i;
- if ( !ads_dns_parse_rr( ctx, buffer, buffer+resp_len, &p, &rr ) ) {
- DEBUG(1,("ads_dns_lookup_srv: Failed to parse additional records section!\n"));
+ if (!ads_dns_parse_rr(ctx, buffer, buffer+resp_len,
+ &p, &rr)) {
+ DEBUG(1,("ads_dns_lookup_srv: Failed "
+ "to parse additional records section!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
- /* only interested in A records as a shortcut for having to come
- back later and lookup the name. For multi-homed hosts, the
- number of additional records and exceed the number of answer
- records. */
-
-
- if ( (rr.type != T_A) || (rr.rdatalen != 4) )
- continue;
+ /* Only interested in A or AAAA records as a shortcut for having
+ * to come back later and lookup the name. For multi-homed
+ * hosts, the number of additional records and exceed the
+ * number of answer records. */
+
+ if (rr.type != T_A || rr.rdatalen != 4) {
+#if defined(HAVE_IPV6)
+ /* FIXME. RFC2874 defines A6 records. This
+ * requires recusive and horribly complex lookups.
+ * Bastards. Ignore this for now.... JRA.
+ */
+ if (rr.type != T_AAAA || rr.rdatalen != 16)
+#endif
+ continue;
+ }
for ( i=0; i<idx; i++ ) {
if ( strcmp( rr.hostname, dcs[i].hostname ) == 0 ) {
int num_ips = dcs[i].num_ips;
- uint8 *buf;
- struct in_addr *tmp_ips;
+ struct sockaddr_storage *tmp_ss_s;
/* allocate new memory */
-
- if ( dcs[i].num_ips == 0 ) {
- if ( (dcs[i].ips = TALLOC_ARRAY( dcs,
- struct in_addr, 1 )) == NULL )
- {
+
+ if (dcs[i].num_ips == 0) {
+ if ((dcs[i].ss_s = TALLOC_ARRAY(dcs,
+ struct sockaddr_storage, 1 ))
+ == NULL ) {
return NT_STATUS_NO_MEMORY;
}
} else {
- if ( (tmp_ips = TALLOC_REALLOC_ARRAY( dcs, dcs[i].ips,
- struct in_addr, dcs[i].num_ips+1)) == NULL )
- {
+ if ((tmp_ss_s = TALLOC_REALLOC_ARRAY(dcs,
+ dcs[i].ss_s,
+ struct sockaddr_storage,
+ dcs[i].num_ips+1))
+ == NULL ) {
return NT_STATUS_NO_MEMORY;
}
-
- dcs[i].ips = tmp_ips;
+
+ dcs[i].ss_s = tmp_ss_s;
}
dcs[i].num_ips++;
-
+
/* copy the new IP address */
-
- buf = (uint8*)&dcs[i].ips[num_ips].s_addr;
- memcpy( buf, rr.rdata, 4 );
+ if (rr.type == T_A) {
+ struct in_addr ip;
+ memcpy(&ip, rr.rdata, 4);
+ in_addr_to_sockaddr_storage(
+ &dcs[i].ss_s[num_ips],
+ ip);
+ }
+#if defined(HAVE_IPV6)
+ if (rr.type == T_AAAA) {
+ struct in6_addr ip6;
+ memcpy(&ip6, rr.rdata, rr.rdatalen);
+ in6_addr_to_sockaddr_storage(
+ &dcs[i].ss_s[num_ips],
+ ip6);
+ }
+#endif
}
}
}
qsort( dcs, idx, sizeof(struct dns_rr_srv), QSORT_CAST dnssrvcmp );
-
+
*dclist = dcs;
*numdcs = idx;
-
+
return NT_STATUS_OK;
}
Simple wrapper for a DNS NS query
*********************************************************************/
-NTSTATUS ads_dns_lookup_ns( TALLOC_CTX *ctx, const char *dnsdomain, struct dns_rr_ns **nslist, int *numns )
+NTSTATUS ads_dns_lookup_ns(TALLOC_CTX *ctx,
+ const char *dnsdomain,
+ struct dns_rr_ns **nslist,
+ int *numns)
{
uint8 *buffer = NULL;
int resp_len = 0;
if ( !ctx || !dnsdomain || !nslist ) {
return NT_STATUS_INVALID_PARAMETER;
}
-
- /* Send the request. May have to loop several times in case
+
+ /* Send the request. May have to loop several times in case
of large replies */
-
+
status = dns_send_req( ctx, dnsdomain, T_NS, &buffer, &resp_len );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(3,("ads_dns_lookup_ns: Failed to send DNS query (%s)\n",
available in libresolv.a, and not the shared lib. Who knows why....
So we have to parse the DNS reply ourselves */
- /* Pull the answer RR's count from the header. Use the NMB ordering macros */
+ /* Pull the answer RR's count from the header.
+ * Use the NMB ordering macros */
query_count = RSVAL( p, 4 );
answer_count = RSVAL( p, 6 );
auth_count = RSVAL( p, 8 );
additional_count = RSVAL( p, 10 );
- DEBUG(4,("ads_dns_lookup_ns: %d records returned in the answer section.\n",
+ DEBUG(4,("ads_dns_lookup_ns: "
+ "%d records returned in the answer section.\n",
answer_count));
-
+
if (answer_count) {
- if ( (nsarray = TALLOC_ARRAY(ctx, struct dns_rr_ns, answer_count)) == NULL ) {
- DEBUG(0,("ads_dns_lookup_ns: talloc() failure for %d char*'s\n",
+ if ((nsarray = TALLOC_ARRAY(ctx, struct dns_rr_ns,
+ answer_count)) == NULL ) {
+ DEBUG(0,("ads_dns_lookup_ns: "
+ "talloc() failure for %d char*'s\n",
answer_count));
return NT_STATUS_NO_MEMORY;
}
for ( rrnum=0; rrnum<query_count; rrnum++ ) {
struct dns_query q;
- if ( !ads_dns_parse_query( ctx, buffer, buffer+resp_len, &p, &q ) ) {
- DEBUG(1,("ads_dns_lookup_ns: Failed to parse query record!\n"));
+ if (!ads_dns_parse_query(ctx, buffer, buffer+resp_len,
+ &p, &q)) {
+ DEBUG(1,("ads_dns_lookup_ns: "
+ " Failed to parse query record!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
}
/* now we are at the answer section */
for ( rrnum=0; rrnum<answer_count; rrnum++ ) {
- if ( !ads_dns_parse_rr_ns( ctx, buffer, buffer+resp_len, &p, &nsarray[rrnum] ) ) {
- DEBUG(1,("ads_dns_lookup_ns: Failed to parse answer record!\n"));
+ if (!ads_dns_parse_rr_ns(ctx, buffer, buffer+resp_len,
+ &p, &nsarray[rrnum])) {
+ DEBUG(1,("ads_dns_lookup_ns: "
+ "Failed to parse answer record!\n"));
return NT_STATUS_UNSUCCESSFUL;
- }
+ }
}
idx = rrnum;
for ( rrnum=0; rrnum<auth_count; rrnum++ ) {
struct dns_rr rr;
- if ( !ads_dns_parse_rr( ctx, buffer, buffer+resp_len, &p, &rr ) ) {
- DEBUG(1,("ads_dns_lookup_ns: Failed to parse authority record!\n"));
+ if ( !ads_dns_parse_rr(ctx, buffer, buffer+resp_len,
+ &p, &rr)) {
+ DEBUG(1,("ads_dns_lookup_ns: "
+ "Failed to parse authority record!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
}
struct dns_rr rr;
int i;
- if ( !ads_dns_parse_rr( ctx, buffer, buffer+resp_len, &p, &rr ) ) {
- DEBUG(1,("ads_dns_lookup_ns: Failed to parse additional records section!\n"));
+ if (!ads_dns_parse_rr(ctx, buffer, buffer+resp_len,
+ &p, &rr)) {
+ DEBUG(1,("ads_dns_lookup_ns: Failed "
+ "to parse additional records section!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
- /* only interested in A records as a shortcut for having to come
+ /* only interested in A records as a shortcut for having to come
back later and lookup the name */
- if ( (rr.type != T_A) || (rr.rdatalen != 4) )
- continue;
+ if (rr.type != T_A || rr.rdatalen != 4) {
+#if defined(HAVE_IPV6)
+ if (rr.type != T_AAAA || rr.rdatalen != 16)
+#endif
+ continue;
+ }
for ( i=0; i<idx; i++ ) {
- if ( strcmp( rr.hostname, nsarray[i].hostname ) == 0 ) {
- uint8 *buf = (uint8*)&nsarray[i].ip.s_addr;
- memcpy( buf, rr.rdata, 4 );
+ if (strcmp(rr.hostname, nsarray[i].hostname) == 0) {
+ if (rr.type == T_A) {
+ struct in_addr ip;
+ memcpy(&ip, rr.rdata, 4);
+ in_addr_to_sockaddr_storage(
+ &nsarray[i].ss,
+ ip);
+ }
+#if defined(HAVE_IPV6)
+ if (rr.type == T_AAAA) {
+ struct in6_addr ip6;
+ memcpy(&ip6, rr.rdata, rr.rdatalen);
+ in6_addr_to_sockaddr_storage(
+ &nsarray[i].ss,
+ ip6);
+ }
+#endif
}
}
}
-
+
*nslist = nsarray;
*numns = idx;
-
+
return NT_STATUS_OK;
}
static char *sitename_key(const char *realm)
{
char *keystr;
-
+
if (asprintf(&keystr, SITENAME_KEY, strupper_static(realm)) == -1) {
return NULL;
}
DEBUG(0,("sitename_store: no realm\n"));
return False;
}
-
+
key = sitename_key(realm);
if (!sitename || (sitename && !*sitename)) {
}
expire = get_time_t_max(); /* Store indefinately. */
-
+
DEBUG(10,("sitename_store: realm = [%s], sitename = [%s], expire = [%u]\n",
realm, sitename, (unsigned int)expire ));
bool ret = False;
const char *query_realm;
char *key;
-
+
if (!gencache_init()) {
return False;
}
if (!realm || (strlen(realm) == 0)) {
- query_realm = lp_realm();
+ query_realm = lp_realm();
} else {
query_realm = realm;
}
git.samba.org / samba.git / commitdiff