NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Luke Kenneth Casson Leighton 1994-1998
- Copyright (C) Jeremy Allison 1994-1998
+ Copyright (C) Jeremy Allison 1994-2003
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
struct response_record *rrec,
struct packet_struct *p)
{
- struct nmb_packet *nmb = &p->packet.nmb;
- BOOL success = False;
- struct nmb_name *question_name =
- &rrec->packet->packet.nmb.question.question_name;
- struct in_addr answer_ip;
-
- zero_ip(&answer_ip);
-
- /* Ensure we don't retry the query but leave the response record cleanup
- to the timeout code. We may get more answer responses in which case
- we should mark the name in conflict.. */
- rrec->repeat_count = 0;
-
- if(rrec->num_msgs == 1)
- {
- /* This is the first response. */
-
- if(nmb->header.opcode == NMB_WACK_OPCODE)
- {
- /* WINS server is telling us to wait. Pretend we didn't get
- the response but don't send out any more query requests. */
-
- if( DEBUGLVL( 5 ) )
- {
- dbgtext( "query_name_response: " );
- dbgtext( "WACK from WINS server %s ", inet_ntoa(p->ip) );
- dbgtext( "in querying name %s ", nmb_namestr(question_name) );
- dbgtext( "on subnet %s.\n", subrec->subnet_name );
- }
+ struct nmb_packet *nmb = &p->packet.nmb;
+ bool success = False;
+ struct nmb_name *question_name = &rrec->packet->packet.nmb.question.question_name;
+ struct in_addr answer_ip;
+
+ zero_ip_v4(&answer_ip);
+
+ /* Ensure we don't retry the query but leave the response record cleanup
+ to the timeout code. We may get more answer responses in which case
+ we should mark the name in conflict.. */
+ rrec->repeat_count = 0;
+
+ if(rrec->num_msgs == 1) {
+ /* This is the first response. */
+
+ if(nmb->header.opcode == NMB_WACK_OPCODE) {
+ /* WINS server is telling us to wait. Pretend we didn't get
+ the response but don't send out any more query requests. */
+
+ if( DEBUGLVL( 5 ) ) {
+ dbgtext( "query_name_response: " );
+ dbgtext( "WACK from WINS server %s ", inet_ntoa(p->ip) );
+ dbgtext( "in querying name %s ", nmb_namestr(question_name) );
+ dbgtext( "on subnet %s.\n", subrec->subnet_name );
+ }
- rrec->repeat_count = 0;
- /* How long we should wait for. */
- rrec->repeat_time = p->timestamp + nmb->answers->ttl;
- rrec->num_msgs--;
- return;
- }
- else if(nmb->header.rcode != 0)
- {
- success = False;
-
- if( DEBUGLVL( 5 ) )
- {
- dbgtext( "query_name_response: On subnet %s ", subrec->subnet_name );
- dbgtext( "- negative response from IP %s ", inet_ntoa(p->ip) );
- dbgtext( "for name %s. ", nmb_namestr(question_name) );
- dbgtext( "Error code was %d.\n", nmb->header.rcode );
- }
- }
- else
- {
- success = True;
-
- putip((char *)&answer_ip,&nmb->answers->rdata[2]);
- if( DEBUGLVL( 5 ) )
- {
- dbgtext( "query_name_response: On subnet %s ", subrec->subnet_name );
- dbgtext( "- positive response from IP %s ", inet_ntoa(p->ip) );
- dbgtext( "for name %s. ", nmb_namestr(question_name) );
- dbgtext( "IP of that name is %s\n", inet_ntoa(answer_ip) );
- }
-
- /* Interestingly, we could add these names to our namelists, and
- change nmbd to a model that checked its own name cache first,
- before sending out a query. This is a task for another day, though.
- */
- }
- }
- else if( rrec->num_msgs > 1)
- {
- if( DEBUGLVL( 0 ) )
- {
- putip( (char *)&answer_ip, &nmb->answers->rdata[2] );
- dbgtext( "query_name_response: " );
- dbgtext( "Multiple (%d) responses ", rrec->num_msgs );
- dbgtext( "received for a query on subnet %s ", subrec->subnet_name );
- dbgtext( "for name %s.\nThis response ", nmb_namestr(question_name) );
- dbgtext( "was from IP %s, reporting", inet_ntoa(p->ip) );
- dbgtext( "an IP address of %s.\n", inet_ntoa(answer_ip) );
- }
-
- /* We have already called the success or fail function, so we
- don't call again here. Leave the response record around in
- case we get more responses. */
-
- return;
- }
+ rrec->repeat_count = 0;
+ /* How long we should wait for. */
+ if (nmb->answers) {
+ rrec->repeat_time = p->timestamp + nmb->answers->ttl;
+ } else {
+ /* No answer - this is probably a corrupt
+ packet.... */
+ DEBUG(0,("query_name_response: missing answer record in "
+ "NMB_WACK_OPCODE response.\n"));
+ rrec->repeat_time = p->timestamp + 10;
+ }
+ rrec->num_msgs--;
+ return;
+ } else if(nmb->header.rcode != 0) {
+
+ success = False;
+
+ if( DEBUGLVL( 5 ) ) {
+ dbgtext( "query_name_response: On subnet %s ", subrec->subnet_name );
+ dbgtext( "- negative response from IP %s ", inet_ntoa(p->ip) );
+ dbgtext( "for name %s. ", nmb_namestr(question_name) );
+ dbgtext( "Error code was %d.\n", nmb->header.rcode );
+ }
+ } else {
+ if (!nmb->answers) {
+ dbgtext( "query_name_response: On subnet %s ", subrec->subnet_name );
+ dbgtext( "IP %s ", inet_ntoa(p->ip) );
+ dbgtext( "returned a success response with no answer\n" );
+ return;
+ }
+
+ success = True;
+
+ putip((char *)&answer_ip,&nmb->answers->rdata[2]);
+
+ if( DEBUGLVL( 5 ) ) {
+ dbgtext( "query_name_response: On subnet %s ", subrec->subnet_name );
+ dbgtext( "- positive response from IP %s ", inet_ntoa(p->ip) );
+ dbgtext( "for name %s. ", nmb_namestr(question_name) );
+ dbgtext( "IP of that name is %s\n", inet_ntoa(answer_ip) );
+ }
+
+ /* Interestingly, we could add these names to our namelists, and
+ change nmbd to a model that checked its own name cache first,
+ before sending out a query. This is a task for another day, though.
+ */
+ }
+ } else if( rrec->num_msgs > 1) {
+
+ if( DEBUGLVL( 0 ) ) {
+ if (nmb->answers)
+ putip( (char *)&answer_ip, &nmb->answers->rdata[2] );
+ dbgtext( "query_name_response: " );
+ dbgtext( "Multiple (%d) responses ", rrec->num_msgs );
+ dbgtext( "received for a query on subnet %s ", subrec->subnet_name );
+ dbgtext( "for name %s.\nThis response ", nmb_namestr(question_name) );
+ dbgtext( "was from IP %s, reporting ", inet_ntoa(p->ip) );
+ dbgtext( "an IP address of %s.\n", inet_ntoa(answer_ip) );
+ }
+
+ /* We have already called the success or fail function, so we
+ don't call again here. Leave the response record around in
+ case we get more responses. */
+
+ return;
+ }
- if(success && rrec->success_fn)
- (*(query_name_success_function)rrec->success_fn)(subrec, rrec->userdata, question_name, answer_ip, nmb->answers);
- else if( rrec->fail_fn)
- (*(query_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name, nmb->header.rcode);
+ if(success && rrec->success_fn)
+ (*(query_name_success_function)rrec->success_fn)(subrec, rrec->userdata, question_name, answer_ip, nmb->answers);
+ else if( rrec->fail_fn)
+ (*(query_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name, nmb->header.rcode);
}
static void query_name_timeout_response(struct subnet_record *subrec,
struct response_record *rrec)
{
- struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb;
- /* We can only fail here, never succeed. */
- BOOL failed = True;
- struct nmb_name *question_name = &sent_nmb->question.question_name;
-
- if(rrec->num_msgs != 0)
- {
- /* We got at least one response, and have called the success/fail
- function already. */
-
- failed = False;
- }
-
- if(failed)
- {
- if( DEBUGLVL( 5 ) )
- {
- dbgtext( "query_name_timeout_response: No response to " );
- dbgtext( "query for name %s ", nmb_namestr(question_name) );
- dbgtext( "on subnet %s.\n", subrec->subnet_name );
- }
- if(rrec->fail_fn)
- (*(query_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name, 0);
- }
-
- remove_response_record(subrec, rrec);
+ struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb;
+ /* We can only fail here, never succeed. */
+ bool failed = True;
+ struct nmb_name *question_name = &sent_nmb->question.question_name;
+
+ if(rrec->num_msgs != 0) {
+ /* We got at least one response, and have called the success/fail
+ function already. */
+
+ failed = False;
+ }
+
+ if(failed) {
+ if( DEBUGLVL( 5 ) ) {
+ dbgtext( "query_name_timeout_response: No response to " );
+ dbgtext( "query for name %s ", nmb_namestr(question_name) );
+ dbgtext( "on subnet %s.\n", subrec->subnet_name );
+ }
+
+ if(rrec->fail_fn)
+ (*(query_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name, 0);
+ }
+
+ remove_response_record(subrec, rrec);
}
/****************************************************************************
name is not there we look for the name on the given subnet.
****************************************************************************/
-static BOOL query_local_namelists(struct subnet_record *subrec, struct nmb_name *nmbname,
+static bool query_local_namelists(struct subnet_record *subrec, struct nmb_name *nmbname,
struct name_record **namerecp)
{
- struct name_record *namerec;
+ struct name_record *namerec;
- *namerecp = NULL;
+ *namerecp = NULL;
- if(find_name_in_lmhosts(nmbname, namerecp))
- return True;
+ if(find_name_in_lmhosts(nmbname, namerecp))
+ return True;
- if((namerec = find_name_on_subnet(subrec, nmbname, FIND_ANY_NAME))==NULL)
- return False;
-
- if( NAME_IS_ACTIVE(namerec)
- && ( (namerec->data.source == SELF_NAME)
- || (namerec->data.source == LMHOSTS_NAME) ) )
- {
- *namerecp = namerec;
- return True;
- }
- return False;
+ if((namerec = find_name_on_subnet(subrec, nmbname, FIND_ANY_NAME))==NULL)
+ return False;
+
+ if( NAME_IS_ACTIVE(namerec) && ( (namerec->data.source == SELF_NAME) || (namerec->data.source == LMHOSTS_NAME) ) ) {
+ *namerecp = namerec;
+ return True;
+ }
+ return False;
}
/****************************************************************************
Try and query for a name.
****************************************************************************/
-BOOL query_name(struct subnet_record *subrec, char *name, int type,
+bool query_name(struct subnet_record *subrec, const char *name, int type,
query_name_success_function success_fn,
query_name_fail_function fail_fn,
struct userdata_struct *userdata)
{
- struct nmb_name nmbname;
- struct name_record *namerec;
-
- make_nmb_name(&nmbname, name, type);
-
- /*
- * We need to check our local namelists first.
- * It may be an magic name, lmhosts name or just
- * a name we have registered.
- */
-
- if(query_local_namelists(subrec, &nmbname, &namerec) == True)
- {
- struct res_rec rrec;
- int i;
-
- memset((char *)&rrec, '\0', sizeof(struct res_rec));
-
- /* Fake up the needed res_rec just in case it's used. */
- rrec.rr_name = nmbname;
- rrec.rr_type = RR_TYPE_NB;
- rrec.rr_class = RR_CLASS_IN;
- rrec.ttl = PERMANENT_TTL;
- rrec.rdlength = namerec->data.num_ips * 6;
- if(rrec.rdlength > MAX_DGRAM_SIZE)
- {
- if( DEBUGLVL( 0 ) )
- {
- dbgtext( "query_name: nmbd internal error - " );
- dbgtext( "there are %d ip addresses ", namerec->data.num_ips );
- dbgtext( "for name %s.\n", nmb_namestr(&nmbname) );
- }
- return False;
- }
-
- for( i = 0; i < namerec->data.num_ips; i++)
- {
- set_nb_flags( &rrec.rdata[i*6], namerec->data.nb_flags );
- putip( &rrec.rdata[(i*6) + 2], (char *)&namerec->data.ip[i]);
- }
-
- /* Call the success function directly. */
- if(success_fn)
- (*(query_name_success_function)success_fn)(subrec, userdata, &nmbname, namerec->data.ip[0], &rrec);
- return False;
- }
-
- if(queue_query_name( subrec,
- query_name_response,
- query_name_timeout_response,
- success_fn,
- fail_fn,
- userdata,
- &nmbname) == NULL)
- {
- if( DEBUGLVL( 0 ) )
- {
- dbgtext( "query_name: Failed to send packet " );
- dbgtext( "trying to query name %s\n", nmb_namestr(&nmbname) );
- }
- return True;
- }
- return False;
+ struct nmb_name nmbname;
+ struct name_record *namerec;
+
+ make_nmb_name(&nmbname, name, type);
+
+ /*
+ * We need to check our local namelists first.
+ * It may be an magic name, lmhosts name or just
+ * a name we have registered.
+ */
+
+ if(query_local_namelists(subrec, &nmbname, &namerec) == True) {
+ struct res_rec rrec;
+ int i;
+
+ memset((char *)&rrec, '\0', sizeof(struct res_rec));
+
+ /* Fake up the needed res_rec just in case it's used. */
+ rrec.rr_name = nmbname;
+ rrec.rr_type = RR_TYPE_NB;
+ rrec.rr_class = RR_CLASS_IN;
+ rrec.ttl = PERMANENT_TTL;
+ rrec.rdlength = namerec->data.num_ips * 6;
+ if(rrec.rdlength > MAX_DGRAM_SIZE) {
+ if( DEBUGLVL( 0 ) ) {
+ dbgtext( "query_name: nmbd internal error - " );
+ dbgtext( "there are %d ip addresses ", namerec->data.num_ips );
+ dbgtext( "for name %s.\n", nmb_namestr(&nmbname) );
+ }
+ return False;
+ }
+
+ for( i = 0; i < namerec->data.num_ips; i++) {
+ set_nb_flags( &rrec.rdata[i*6], namerec->data.nb_flags );
+ putip( &rrec.rdata[(i*6) + 2], (char *)&namerec->data.ip[i]);
+ }
+
+ /* Call the success function directly. */
+ if(success_fn)
+ (*(query_name_success_function)success_fn)(subrec, userdata, &nmbname, namerec->data.ip[0], &rrec);
+ return False;
+ }
+
+ if(queue_query_name( subrec, query_name_response, query_name_timeout_response, success_fn, fail_fn, userdata, &nmbname) == NULL) {
+ if( DEBUGLVL( 0 ) ) {
+ dbgtext( "query_name: Failed to send packet " );
+ dbgtext( "trying to query name %s\n", nmb_namestr(&nmbname) );
+ }
+ return True;
+ }
+ return False;
}
/****************************************************************************
Try and query for a name from nmbd acting as a WINS server.
****************************************************************************/
-BOOL query_name_from_wins_server(struct in_addr ip_to,
- char *name, int type,
+bool query_name_from_wins_server(struct in_addr ip_to,
+ const char *name, int type,
query_name_success_function success_fn,
query_name_fail_function fail_fn,
struct userdata_struct *userdata)
{
- struct nmb_name nmbname;
-
- make_nmb_name(&nmbname, name, type);
-
- if(queue_query_name_from_wins_server( ip_to,
- query_name_response,
- query_name_timeout_response,
- success_fn,
- fail_fn,
- userdata,
- &nmbname) == NULL)
- {
- if( DEBUGLVL( 0 ) )
- {
- dbgtext( "query_name_from_wins_server: Failed to send packet " );
- dbgtext( "trying to query name %s\n", nmb_namestr(&nmbname) );
- }
- return True;
- }
- return False;
+ struct nmb_name nmbname;
+
+ make_nmb_name(&nmbname, name, type);
+
+ if(queue_query_name_from_wins_server( ip_to, query_name_response, query_name_timeout_response, success_fn, fail_fn, userdata, &nmbname) == NULL) {
+ if( DEBUGLVL( 0 ) ) {
+ dbgtext( "query_name_from_wins_server: Failed to send packet " );
+ dbgtext( "trying to query name %s\n", nmb_namestr(&nmbname) );
+ }
+ return True;
+ }
+ return False;
}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff