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Diffstat (limited to 'source3/nmbd/nmbd_namerelease.c')
-rw-r--r--source3/nmbd/nmbd_namerelease.c366
1 files changed, 175 insertions, 191 deletions
diff --git a/source3/nmbd/nmbd_namerelease.c b/source3/nmbd/nmbd_namerelease.c
index cefab44a08..0611ca9323 100644
--- a/source3/nmbd/nmbd_namerelease.c
+++ b/source3/nmbd/nmbd_namerelease.c
@@ -28,85 +28,72 @@
****************************************************************************/
static void release_name_response(struct subnet_record *subrec,
- struct response_record *rrec, struct packet_struct *p)
+ struct response_record *rrec, struct packet_struct *p)
{
- /*
- * If we are releasing broadcast, then getting a response is an
- * error. If we are releasing unicast, then we expect to get a response.
- */
-
- struct nmb_packet *nmb = &p->packet.nmb;
- BOOL bcast = nmb->header.nm_flags.bcast;
- BOOL success = True;
- struct nmb_name *question_name = &rrec->packet->packet.nmb.question.question_name;
- struct nmb_name *answer_name = &nmb->answers->rr_name;
- struct in_addr released_ip;
-
- /* Sanity check. Ensure that the answer name in the incoming packet is the
- same as the requested name in the outgoing packet. */
-
- if(!nmb_name_equal(question_name, answer_name))
- {
- DEBUG(0,("release_name_response: Answer name %s differs from question \
-name %s.\n", nmb_namestr(answer_name), nmb_namestr(question_name)));
- return;
- }
-
- if(bcast)
- {
- /* Someone sent a response. This shouldn't happen/ */
- DEBUG(1,("release_name_response: A response for releasing name %s was received on a \
-broadcast subnet %s. This should not happen !\n", nmb_namestr(answer_name), subrec->subnet_name));
- return;
- }
- else
- {
- /* Unicast - check to see if the response allows us to release the name. */
- if(nmb->header.rcode != 0)
- {
- /* Error code - we were told not to release the name ! What now ! */
- success = False;
-
- DEBUG(0,("release_name_response: WINS server at IP %s rejected our \
-name release of name %s with error code %d.\n", inet_ntoa(p->ip),
- nmb_namestr(answer_name), nmb->header.rcode));
-
- }
- else 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 release requests. */
-
- DEBUG(5,("release_name_response: WACK from WINS server %s in releasing \
-name %s on subnet %s.\n", inet_ntoa(p->ip), nmb_namestr(answer_name), 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;
- }
- }
-
- DEBUG(5,("release_name_response: %s in releasing name %s on subnet %s.\n",
- success ? "success" : "failure", nmb_namestr(answer_name), subrec->subnet_name));
-
- if(success)
- {
- putip((char*)&released_ip ,&nmb->answers->rdata[2]);
-
- if(rrec->success_fn)
- (*(release_name_success_function)rrec->success_fn)(subrec, rrec->userdata, answer_name, released_ip);
- standard_success_release( subrec, rrec->userdata, answer_name, released_ip);
- }
- else
- {
- /* We have no standard_fail_release - maybe we should add one ? */
- if(rrec->fail_fn)
- (*(release_name_fail_function)rrec->fail_fn)(subrec, rrec, answer_name);
- }
-
- remove_response_record(subrec, rrec);
+ /*
+ * If we are releasing broadcast, then getting a response is an
+ * error. If we are releasing unicast, then we expect to get a response.
+ */
+ struct nmb_packet *nmb = &p->packet.nmb;
+ BOOL bcast = nmb->header.nm_flags.bcast;
+ BOOL success = True;
+ struct nmb_name *question_name = &rrec->packet->packet.nmb.question.question_name;
+ struct nmb_name *answer_name = &nmb->answers->rr_name;
+ struct in_addr released_ip;
+
+ /* Sanity check. Ensure that the answer name in the incoming packet is the
+ same as the requested name in the outgoing packet. */
+ if (!nmb_name_equal(question_name, answer_name)) {
+ DEBUG(0,("release_name_response: Answer name %s differs from question name %s.\n",
+ nmb_namestr(answer_name), nmb_namestr(question_name)));
+ return;
+ }
+
+ if (bcast) {
+ /* Someone sent a response to a bcast release? ignore it. */
+ return;
+ }
+
+ /* Unicast - check to see if the response allows us to release the name. */
+ if (nmb->header.rcode != 0) {
+ /* Error code - we were told not to release the name ! What now ! */
+ success = False;
+
+ DEBUG(0,("release_name_response: WINS server at IP %s rejected our \
+name release of name %s with error code %d.\n",
+ inet_ntoa(p->ip),
+ nmb_namestr(answer_name), nmb->header.rcode));
+ } else 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 release requests. */
+
+ DEBUG(5,("release_name_response: WACK from WINS server %s in releasing \
+name %s on subnet %s.\n",
+ inet_ntoa(p->ip), nmb_namestr(answer_name), 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;
+ }
+
+ DEBUG(5,("release_name_response: %s in releasing name %s on subnet %s.\n",
+ success ? "success" : "failure", nmb_namestr(answer_name), subrec->subnet_name));
+ if (success) {
+ putip((char*)&released_ip ,&nmb->answers->rdata[2]);
+
+ if(rrec->success_fn)
+ (*(release_name_success_function)rrec->success_fn)(subrec, rrec->userdata, answer_name, released_ip);
+ standard_success_release( subrec, rrec->userdata, answer_name, released_ip);
+ } else {
+ /* We have no standard_fail_release - maybe we should add one ? */
+ if (rrec->fail_fn) {
+ (*(release_name_fail_function)rrec->fail_fn)(subrec, rrec, answer_name);
+ }
+ }
+
+ remove_response_record(subrec, rrec);
}
/****************************************************************************
@@ -114,125 +101,122 @@ name %s on subnet %s.\n", inet_ntoa(p->ip), nmb_namestr(answer_name), subrec->su
****************************************************************************/
static void release_name_timeout_response(struct subnet_record *subrec,
- struct response_record *rrec)
+ struct response_record *rrec)
{
- /*
- * If we are releasing unicast, then NOT getting a response is an
- * error - we could not release the name. If we are releasing broadcast,
- * then we don't expect to get a response.
- */
-
- struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb;
- BOOL bcast = sent_nmb->header.nm_flags.bcast;
- BOOL success = False;
- struct nmb_name *question_name = &sent_nmb->question.question_name;
- struct in_addr released_ip;
-
- if(bcast)
- {
- if(rrec->num_msgs == 0)
- {
- /* Not receiving a message is success for broadcast release. */
- success = True;
-
- /* Get the ip address we were trying to release. */
- putip((char*)&released_ip ,&sent_nmb->additional->rdata[2]);
- }
- }
- else
- {
- /* Unicast - if no responses then it's an error. */
- if(rrec->num_msgs == 0)
- {
- DEBUG(2,("release_name_timeout_response: WINS server at address %s is not \
-responding.\n", inet_ntoa(rrec->packet->ip)));
-
- /* mark it temporarily dead */
- wins_srv_died(rrec->packet->ip);
-
- /* and try the next wins server */
- rrec->packet->ip = wins_srv_ip();
-
- /* also update the UNICODE subnet IPs */
- subrec->bcast_ip = subrec->mask_ip = subrec->myip = rrec->packet->ip;
-
- /* Reset the number of attempts to zero and double the interval between
- retries. Max out at 5 minutes. */
- rrec->repeat_count = 3;
- rrec->repeat_interval *= 2;
- if(rrec->repeat_interval > (5 * 60))
- rrec->repeat_interval = (5 * 60);
- rrec->repeat_time = time(NULL) + rrec->repeat_interval;
-
- DEBUG(5,("release_name_timeout_response: increasing WINS timeout to %d seconds.\n",
- (int)rrec->repeat_interval));
- return; /* Don't remove the response record. */
- }
- }
-
- DEBUG(5,("release_name_timeout_response: %s in releasing name %s on subnet %s.\n",
- success ? "success" : "failure", nmb_namestr(question_name), subrec->subnet_name));
-
- if(success && rrec->success_fn)
- {
- if(rrec->success_fn)
- (*(release_name_success_function)rrec->success_fn)(subrec, rrec->userdata, question_name, released_ip);
- standard_success_release( subrec, rrec->userdata, question_name, released_ip);
- }
- else
- {
- /* We have no standard_fail_release - maybe we should add one ? */
- if( rrec->fail_fn)
- (*(release_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name);
- }
-
- remove_response_record(subrec, rrec);
+ /* a release is *always* considered to be successful when it
+ times out. This doesn't cause problems as if a WINS server
+ doesn't respond and someone else wants the name then the
+ normal WACK/name query from the WINS server will cope */
+ struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb;
+ BOOL bcast = sent_nmb->header.nm_flags.bcast;
+ struct nmb_name *question_name = &sent_nmb->question.question_name;
+ struct in_addr released_ip;
+
+ /* Get the ip address we were trying to release. */
+ putip((char*)&released_ip ,&sent_nmb->additional->rdata[2]);
+
+ if (!bcast) {
+ /* mark the WINS server temporarily dead */
+ wins_srv_died(rrec->packet->ip, released_ip);
+ }
+
+ DEBUG(5,("release_name_timeout_response: success in releasing name %s on subnet %s.\n",
+ nmb_namestr(question_name), subrec->subnet_name));
+
+ if (rrec->success_fn) {
+ (*(release_name_success_function)rrec->success_fn)(subrec, rrec->userdata, question_name, released_ip);
+ }
+
+ standard_success_release( subrec, rrec->userdata, question_name, released_ip);
+ remove_response_record(subrec, rrec);
}
+
+/*
+ when releasing a name with WINS we need to send the release to each of
+ the WINS groups
+*/
+static void wins_release_name(struct name_record *namerec,
+ release_name_success_function success_fn,
+ release_name_fail_function fail_fn,
+ struct userdata_struct *userdata)
+{
+ int t, i;
+ char **wins_tags;
+
+ /* get the list of wins tags - we try to release for each of them */
+ wins_tags = wins_srv_tags();
+
+ for (t=0;wins_tags && wins_tags[t]; t++) {
+ for (i = 0; i < namerec->data.num_ips; i++) {
+ struct in_addr wins_ip = wins_srv_ip_tag(wins_tags[t], namerec->data.ip[i]);
+
+ BOOL last_one = ((i==namerec->data.num_ips - 1) && !wins_tags[t+1]);
+ if (queue_release_name(unicast_subnet,
+ release_name_response,
+ release_name_timeout_response,
+ last_one?success_fn : NULL,
+ last_one? fail_fn : NULL,
+ last_one? userdata : NULL,
+ &namerec->name,
+ namerec->data.nb_flags,
+ namerec->data.ip[i],
+ wins_ip) == NULL) {
+ DEBUG(0,("release_name: Failed to send packet trying to release name %s IP %s\n",
+ nmb_namestr(&namerec->name), inet_ntoa(namerec->data.ip[i]) ));
+ }
+ }
+ }
+
+ wins_srv_tags_free(wins_tags);
+}
+
+
/****************************************************************************
Try and release one of our names.
****************************************************************************/
-BOOL release_name(struct subnet_record *subrec, struct name_record *namerec,
- release_name_success_function success_fn,
- release_name_fail_function fail_fn,
- struct userdata_struct *userdata)
+void release_name(struct subnet_record *subrec, struct name_record *namerec,
+ release_name_success_function success_fn,
+ release_name_fail_function fail_fn,
+ struct userdata_struct *userdata)
{
- int i;
-
- /* Ensure it's a SELF name, and in the ACTIVE state. */
- if((namerec->data.source != SELF_NAME) || !NAME_IS_ACTIVE(namerec))
- {
- DEBUG(0,("release_name: Cannot release name %s from subnet %s. Source was %d \n",
- nmb_namestr(&namerec->name), subrec->subnet_name, namerec->data.source));
- return True;
- }
-
- /* Set the name into the deregistering state. */
- namerec->data.nb_flags |= NB_DEREG;
-
- /*
- * Go through and release the name for all known ip addresses.
- * Only call the success/fail function on the last one (it should
- * only be done once).
- */
-
- for( i = 0; i < namerec->data.num_ips; i++)
- {
- if(queue_release_name( subrec,
- release_name_response,
- release_name_timeout_response,
- (i == (namerec->data.num_ips - 1)) ? success_fn : NULL,
- (i == (namerec->data.num_ips - 1)) ? fail_fn : NULL,
- (i == (namerec->data.num_ips - 1)) ? userdata : NULL,
- &namerec->name,
- namerec->data.nb_flags,
- namerec->data.ip[i]) == NULL)
- {
- DEBUG(0,("release_name: Failed to send packet trying to release name %s IP %s\n",
- nmb_namestr(&namerec->name), inet_ntoa(namerec->data.ip[i]) ));
- return True;
- }
- }
- return False;
+ int i;
+
+ /* Ensure it's a SELF name, and in the ACTIVE state. */
+ if ((namerec->data.source != SELF_NAME) || !NAME_IS_ACTIVE(namerec)) {
+ DEBUG(0,("release_name: Cannot release name %s from subnet %s. Source was %d \n",
+ nmb_namestr(&namerec->name), subrec->subnet_name, namerec->data.source));
+ return;
+ }
+
+ /* Set the name into the deregistering state. */
+ namerec->data.nb_flags |= NB_DEREG;
+
+ /* wins releases are a bit different */
+ if (subrec == unicast_subnet) {
+ wins_release_name(namerec, success_fn, fail_fn, userdata);
+ return;
+ }
+
+ /*
+ * Go through and release the name for all known ip addresses.
+ * Only call the success/fail function on the last one (it should
+ * only be done once).
+ */
+ for (i = 0; i < namerec->data.num_ips; i++) {
+ if (queue_release_name(subrec,
+ release_name_response,
+ release_name_timeout_response,
+ (i == (namerec->data.num_ips - 1)) ? success_fn : NULL,
+ (i == (namerec->data.num_ips - 1)) ? fail_fn : NULL,
+ (i == (namerec->data.num_ips - 1)) ? userdata : NULL,
+ &namerec->name,
+ namerec->data.nb_flags,
+ namerec->data.ip[i],
+ subrec->bcast_ip) == NULL) {
+ DEBUG(0,("release_name: Failed to send packet trying to release name %s IP %s\n",
+ nmb_namestr(&namerec->name), inet_ntoa(namerec->data.ip[i]) ));
+ }
+ }
}