This is it ! The mega-merge of the JRA_NMBD_REWRITE branch

back into the main tree.
For the cvs logs of all the files starting nmbd_*.c, look
in the JRA_NMBD_REWRITE branch. That branch has now been
discontinued.
Jeremy.
(This used to be commit d80b0cb645f81d16734929a0b27a91c6650499bb)

1 files changed, 238 insertions, 0 deletions

diff --git a/source3/nmbd/nmbd_namerelease.c b/source3/nmbd/nmbd_namerelease.c
new file mode 100644
index 0000000000..8632dd7655
--- /dev/null
+++ b/source3/nmbd/nmbd_namerelease.c
@@ -0,0 +1,238 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   NBT netbios routines and daemon - version 2
+   Copyright (C) Andrew Tridgell 1994-1997
+   Copyright (C) Luke Kenneth Casson Leighton 1994-1997 
+   Copyright (C) Jeremy Allison 1994-1997
+   
+   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
+   (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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+extern pstring scope;
+
+/****************************************************************************
+ 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)
+{
+  /* 
+   * 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", namestr(answer_name), 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", 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), 
+                  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), 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", 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);
+}
+
+/****************************************************************************
+ Deal with a timeout when releasing one of our names.
+****************************************************************************/
+
+static void release_name_timeout_response(struct subnet_record *subrec,
+                       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",
+              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", 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);
+}
+
+/****************************************************************************
+ 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)
+{
+  int i;
+
+  /* Ensure it's a SELF name, and in the ACTIVE state. */
+  if((namerec->source != SELF_NAME) || !NAME_IS_ACTIVE(namerec))
+  {
+    DEBUG(0,("release_name: Cannot release name %s from subnet %s. Source was %d \n",
+           namestr(&namerec->name), subrec->subnet_name, namerec->source)); 
+    return True;
+  }
+
+  /* Set the name into the deregistering state. */
+  namerec->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->num_ips; i++)
+  {
+    if(queue_release_name( subrec,
+        release_name_response,
+        release_name_timeout_response,
+        (i == (namerec->num_ips - 1)) ? success_fn : NULL,
+        (i == (namerec->num_ips - 1)) ? fail_fn : NULL,
+        (i == (namerec->num_ips - 1)) ? userdata : NULL,
+        &namerec->name,
+        namerec->nb_flags,
+        namerec->ip[i]) == NULL)
+    {
+      DEBUG(0,("release_name: Failed to send packet trying to release name %s IP %s\n",
+            namestr(&namerec->name), inet_ntoa(namerec->ip[i]) ));
+      return True;
+    }
+  }
+  return False;
+}