/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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/>.
*/
#include "includes.h"
-extern int DEBUGLEVEL;
-
/****************************************************************************
Deal with a response packet when releasing one of our names.
****************************************************************************/
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)
- (*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)
- (*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);
}
/****************************************************************************
****************************************************************************/
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)));
-
- /* Keep trying to contact the WINS server periodically. This allows
- us to work correctly if the WINS server is down temporarily when
- we want to delete the name. */
-
- /* 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)
- (*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)
- (*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]) ));
+ }
+ }
}
git.samba.org / tprouty / samba.git / blobdiff