This commit was generated by cvs2svn to compensate for changes in r30,

which included commits to RCS files with non-trunk default branches.
(This used to be commit 3a69cffb062d4f1238b8cae10481c1f2ea4d3d8b)

1 files changed, 607 insertions, 0 deletions

diff --git a/source4/nmbd/nmbd_sendannounce.c b/source4/nmbd/nmbd_sendannounce.c
new file mode 100644
index 0000000000..191a3b7c7b
--- /dev/null
+++ b/source4/nmbd/nmbd_sendannounce.c
@@ -0,0 +1,607 @@
+/* 
+   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
+   Copyright (C) Jeremy Allison 1994-1998
+
+   SMB Version handling
+   Copyright (C) John H Terpstra 1995-1998
+   
+   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
+   (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  updatecount;
+extern BOOL found_lm_clients;
+
+/****************************************************************************
+ Send a browser reset packet.
+**************************************************************************/
+
+void send_browser_reset(int reset_type, const char *to_name, int to_type, struct in_addr to_ip)
+{
+  pstring outbuf;
+  char *p;
+
+  DEBUG(3,("send_browser_reset: sending reset request type %d to %s<%02x> IP %s.\n",
+       reset_type, to_name, to_type, inet_ntoa(to_ip) ));
+
+  memset(outbuf,'\0',sizeof(outbuf));
+  p = outbuf;
+  SCVAL(p,0,ANN_ResetBrowserState);
+  p++;
+  SCVAL(p,0,reset_type);
+  p++;
+
+  send_mailslot(True, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
+                lp_netbios_name(), 0x0, to_name, to_type, to_ip, 
+		FIRST_SUBNET->myip, DGRAM_PORT);
+}
+
+/****************************************************************************
+  Broadcast a packet to the local net requesting that all servers in this
+  workgroup announce themselves to us.
+  **************************************************************************/
+
+void broadcast_announce_request(struct subnet_record *subrec, struct work_record *work)
+{
+  pstring outbuf;
+  char *p;
+
+  work->needannounce = True;
+
+  DEBUG(3,("broadcast_announce_request: sending announce request for workgroup %s \
+to subnet %s\n", work->work_group, subrec->subnet_name));
+
+  memset(outbuf,'\0',sizeof(outbuf));
+  p = outbuf;
+  SCVAL(p,0,ANN_AnnouncementRequest);
+  p++;
+
+  SCVAL(p,0,work->token); /* (local) Unique workgroup token id. */
+  p++;
+  p +=  push_string(NULL, p+1, lp_netbios_name(), 15, STR_ASCII|STR_UPPER|STR_TERMINATE);
+  
+  send_mailslot(False, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
+                lp_netbios_name(), 0x0, work->work_group,0x1e, subrec->bcast_ip, 
+		subrec->myip, DGRAM_PORT);
+}
+
+/****************************************************************************
+  Broadcast an announcement.
+  **************************************************************************/
+
+static void send_announcement(struct subnet_record *subrec, int announce_type,
+                              const char *from_name, const char *to_name, int to_type, struct in_addr to_ip,
+                              time_t announce_interval,
+                              const char *server_name, int server_type, const char *server_comment)
+{
+  pstring outbuf;
+  char *p;
+
+  memset(outbuf,'\0',sizeof(outbuf));
+  p = outbuf+1;
+
+  SCVAL(outbuf,0,announce_type);
+
+  /* Announcement parameters. */
+  SCVAL(p,0,updatecount);
+  SIVAL(p,1,announce_interval*1000); /* Milliseconds - despite the spec. */
+
+  push_string(NULL, p+5, server_name, 15, STR_ASCII|STR_UPPER|STR_TERMINATE);
+
+  SCVAL(p,21,lp_major_announce_version()); /* Major version. */
+  SCVAL(p,22,lp_minor_announce_version()); /* Minor version. */
+
+  SIVAL(p,23,server_type & ~SV_TYPE_LOCAL_LIST_ONLY);
+  /* Browse version: got from NT/AS 4.00  - Value defined in smb.h (JHT). */
+  SSVAL(p,27,BROWSER_ELECTION_VERSION);
+  SSVAL(p,29,BROWSER_CONSTANT); /* Browse signature. */
+
+  p += 31 + push_string(NULL, p+31, server_comment, -1, STR_ASCII|STR_TERMINATE);
+
+  send_mailslot(False,BROWSE_MAILSLOT, outbuf, PTR_DIFF(p,outbuf),
+                from_name, 0x0, to_name, to_type, to_ip, subrec->myip,
+		DGRAM_PORT);
+}
+
+/****************************************************************************
+  Broadcast a LanMan announcement.
+**************************************************************************/
+
+static void send_lm_announcement(struct subnet_record *subrec, int announce_type,
+                              char *from_name, char *to_name, int to_type, struct in_addr to_ip,
+                              time_t announce_interval,
+                              char *server_name, int server_type, char *server_comment)
+{
+  pstring outbuf;
+  char *p=outbuf;
+
+  memset(outbuf,'\0',sizeof(outbuf));
+
+  SSVAL(p,0,announce_type);
+  SIVAL(p,2,server_type & ~SV_TYPE_LOCAL_LIST_ONLY);
+  SCVAL(p,6,lp_major_announce_version()); /* Major version. */
+  SCVAL(p,7,lp_minor_announce_version()); /* Minor version. */
+  SSVAL(p,8,announce_interval);            /* In seconds - according to spec. */
+
+  p += 10;
+  /*StrnCpy(p,server_name,15);
+  strupper(p);
+  p = skip_string(p,1);
+  pstrcpy(p,server_comment);
+  p = skip_string(p,1);*/
+  p += push_string(NULL, p, server_name, 15, STR_ASCII|STR_UPPER|STR_TERMINATE);
+  p += push_string(NULL, p, server_comment, sizeof(pstring)-15, STR_ASCII|STR_UPPER|STR_TERMINATE);
+
+  send_mailslot(False,LANMAN_MAILSLOT, outbuf, PTR_DIFF(p,outbuf),
+                from_name, 0x0, to_name, to_type, to_ip, subrec->myip,
+		DGRAM_PORT);
+}
+
+/****************************************************************************
+ We are a local master browser. Announce this to WORKGROUP<1e>.
+****************************************************************************/
+
+static void send_local_master_announcement(struct subnet_record *subrec, struct work_record *work,
+                                           struct server_record *servrec)
+{
+  /* Ensure we don't have the prohibited bit set. */
+  uint32 type = servrec->serv.type & ~SV_TYPE_LOCAL_LIST_ONLY;
+
+  DEBUG(3,("send_local_master_announcement: type %x for name %s on subnet %s for workgroup %s\n",
+            type, lp_netbios_name(), subrec->subnet_name, work->work_group));
+
+  send_announcement(subrec, ANN_LocalMasterAnnouncement,
+                    lp_netbios_name(),                 /* From nbt name. */
+                    work->work_group, 0x1e,          /* To nbt name. */
+                    subrec->bcast_ip,                /* To ip. */
+                    work->announce_interval,         /* Time until next announce. */
+                    lp_netbios_name(),                 /* Name to announce. */
+                    type,                            /* Type field. */
+                    servrec->serv.comment);
+}
+
+/****************************************************************************
+ Announce the workgroup WORKGROUP to MSBROWSE<01>.
+****************************************************************************/
+
+static void send_workgroup_announcement(struct subnet_record *subrec, struct work_record *work)
+{
+  DEBUG(3,("send_workgroup_announcement: on subnet %s for workgroup %s\n",
+            subrec->subnet_name, work->work_group));
+
+  send_announcement(subrec, ANN_DomainAnnouncement,
+                    lp_netbios_name(),                 /* From nbt name. */
+                    MSBROWSE, 0x1,                   /* To nbt name. */
+                    subrec->bcast_ip,                /* To ip. */
+                    work->announce_interval,         /* Time until next announce. */
+                    work->work_group,                /* Name to announce. */
+                    SV_TYPE_DOMAIN_ENUM|SV_TYPE_NT,  /* workgroup announce flags. */
+                    lp_netbios_name());                /* From name as comment. */
+}
+
+/****************************************************************************
+ Announce the given host to WORKGROUP<1d>.
+****************************************************************************/
+
+static void send_host_announcement(struct subnet_record *subrec, struct work_record *work,
+                                   struct server_record *servrec)
+{
+  /* Ensure we don't have the prohibited bits set. */
+  uint32 type = servrec->serv.type & ~SV_TYPE_LOCAL_LIST_ONLY;
+
+  DEBUG(3,("send_host_announcement: type %x for host %s on subnet %s for workgroup %s\n",
+            type, servrec->serv.name, subrec->subnet_name, work->work_group));
+
+  send_announcement(subrec, ANN_HostAnnouncement,
+                    servrec->serv.name,              /* From nbt name. */
+                    work->work_group, 0x1d,          /* To nbt name. */
+                    subrec->bcast_ip,                /* To ip. */
+                    work->announce_interval,         /* Time until next announce. */
+                    servrec->serv.name,              /* Name to announce. */
+                    type,                            /* Type field. */
+                    servrec->serv.comment);
+}
+
+/****************************************************************************
+ Announce the given LanMan host
+****************************************************************************/
+
+static void send_lm_host_announcement(struct subnet_record *subrec, struct work_record *work,
+                                   struct server_record *servrec, int lm_interval)
+{
+  /* Ensure we don't have the prohibited bits set. */
+  uint32 type = servrec->serv.type & ~SV_TYPE_LOCAL_LIST_ONLY;
+
+  DEBUG(3,("send_lm_host_announcement: type %x for host %s on subnet %s for workgroup %s, ttl: %d\n",
+            type, servrec->serv.name, subrec->subnet_name, work->work_group, lm_interval));
+
+  send_lm_announcement(subrec, ANN_HostAnnouncement,
+                    servrec->serv.name,              /* From nbt name. */
+                    work->work_group, 0x00,          /* To nbt name. */
+                    subrec->bcast_ip,                /* To ip. */
+                    lm_interval,                     /* Time until next announce. */
+                    servrec->serv.name,              /* Name to announce. */
+                    type,                            /* Type field. */
+                    servrec->serv.comment);
+}
+
+/****************************************************************************
+  Announce a server record.
+  ****************************************************************************/
+
+static void announce_server(struct subnet_record *subrec, struct work_record *work,
+                     struct server_record *servrec)
+{
+  /* Only do domain announcements if we are a master and it's
+     our primary name we're being asked to announce. */
+
+  if (AM_LOCAL_MASTER_BROWSER(work) && strequal(lp_netbios_name(),servrec->serv.name))
+  {
+    send_local_master_announcement(subrec, work, servrec);
+    send_workgroup_announcement(subrec, work);
+  }
+  else
+  {
+    send_host_announcement(subrec, work, servrec);
+  }
+}
+
+/****************************************************************************
+  Go through all my registered names on all broadcast subnets and announce
+  them if the timeout requires it.
+  **************************************************************************/
+
+void announce_my_server_names(time_t t)
+{
+  struct subnet_record *subrec;
+
+  for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
+  {
+    struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
+
+    if(work)
+    {
+      struct server_record *servrec;
+
+      if (work->needannounce)
+      {
+        /* Drop back to a max 3 minute announce. This is to prevent a
+           single lost packet from breaking things for too long. */
+
+        work->announce_interval = MIN(work->announce_interval,
+                                    CHECK_TIME_MIN_HOST_ANNCE*60);
+        work->lastannounce_time = t - (work->announce_interval+1);
+        work->needannounce = False;
+      }
+
+      /* Announce every minute at first then progress to every 12 mins */
+      if ((t - work->lastannounce_time) < work->announce_interval)
+        continue;
+
+      if (work->announce_interval < (CHECK_TIME_MAX_HOST_ANNCE * 60))
+        work->announce_interval += 60;
+
+      work->lastannounce_time = t;
+
+      for (servrec = work->serverlist; servrec; servrec = servrec->next)
+      {
+        if (is_myname(servrec->serv.name))
+          announce_server(subrec, work, servrec);
+      }
+    } /* if work */
+  } /* for subrec */
+}
+
+/****************************************************************************
+  Go through all my registered names on all broadcast subnets and announce
+  them as a LanMan server if the timeout requires it.
+**************************************************************************/
+
+void announce_my_lm_server_names(time_t t)
+{
+  struct subnet_record *subrec;
+  static time_t last_lm_announce_time=0;
+  int announce_interval = lp_lm_interval();
+  int lm_announce = lp_lm_announce();
+
+  if ((announce_interval <= 0) || (lm_announce <= 0))
+  {
+    /* user absolutely does not want LM announcements to be sent. */
+    return;
+  }
+
+  if ((lm_announce >= 2) && (!found_lm_clients))
+  {
+    /* has been set to 2 (Auto) but no LM clients detected (yet). */
+    return;
+  }
+
+  /* Otherwise: must have been set to 1 (Yes), or LM clients *have*
+     been detected. */
+
+  for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
+  {
+    struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
+
+    if(work)
+    {
+      struct server_record *servrec;
+
+      if (last_lm_announce_time && ((t - last_lm_announce_time) < announce_interval ))
+        continue;
+
+      last_lm_announce_time = t;
+
+      for (servrec = work->serverlist; servrec; servrec = servrec->next)
+      {
+        if (is_myname(servrec->serv.name))
+          /* skipping equivalent of announce_server() */
+          send_lm_host_announcement(subrec, work, servrec, announce_interval);
+      }
+    } /* if work */
+  } /* for subrec */
+}
+
+/* Announce timer. Moved into global static so it can be reset
+   when a machine becomes a local master browser. */
+static time_t announce_timer_last=0;
+
+/****************************************************************************
+ Reset the announce_timer so that a local master browser announce will be done
+ immediately.
+ ****************************************************************************/
+
+void reset_announce_timer(void)
+{
+  announce_timer_last = time(NULL) - (CHECK_TIME_MST_ANNOUNCE * 60);
+}
+
+/****************************************************************************
+  Announce myself as a local master browser to a domain master browser.
+  **************************************************************************/
+
+void announce_myself_to_domain_master_browser(time_t t)
+{
+  struct subnet_record *subrec;
+  struct work_record *work;
+
+  if(!we_are_a_wins_client())
+  {
+    DEBUG(10,("announce_myself_to_domain_master_browser: no unicast subnet, ignoring.\n"));
+    return;
+  }
+
+  if (!announce_timer_last)
+    announce_timer_last = t;
+
+  if ((t-announce_timer_last) < (CHECK_TIME_MST_ANNOUNCE * 60))
+  {
+    DEBUG(10,("announce_myself_to_domain_master_browser: t (%d) - last(%d) < %d\n",
+	      (int)t, (int)announce_timer_last, 
+	      CHECK_TIME_MST_ANNOUNCE * 60 ));
+    return;
+  }
+
+  announce_timer_last = t;
+
+  /* Look over all our broadcast subnets to see if any of them
+     has the state set as local master browser. */
+
+  for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
+  {
+    for (work = subrec->workgrouplist; work; work = work->next)
+    {
+      if (AM_LOCAL_MASTER_BROWSER(work))
+      {
+        DEBUG(4,( "announce_myself_to_domain_master_browser: I am a local master browser for \
+workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
+
+        /* Look in nmbd_browsersync.c for the rest of this code. */
+        announce_and_sync_with_domain_master_browser(subrec, work);
+      }
+    }
+  }
+}
+
+/****************************************************************************
+Announce all samba's server entries as 'gone'.
+This must *only* be called on shutdown.
+****************************************************************************/
+
+void announce_my_servers_removed(void)
+{
+  int announce_interval = lp_lm_interval();
+  int lm_announce = lp_lm_announce();
+  struct subnet_record *subrec; 
+
+  for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
+  {
+    struct work_record *work;
+    for (work = subrec->workgrouplist; work; work = work->next)
+    {
+      struct server_record *servrec;
+
+      work->announce_interval = 0;
+      for (servrec = work->serverlist; servrec; servrec = servrec->next)
+      {
+        if (!is_myname(servrec->serv.name))
+          continue;
+        servrec->serv.type = 0;
+        if(AM_LOCAL_MASTER_BROWSER(work))
+          send_local_master_announcement(subrec, work, servrec);
+        send_host_announcement(subrec, work, servrec);
+
+
+        if ((announce_interval <= 0) || (lm_announce <= 0))
+        {
+          /* user absolutely does not want LM announcements to be sent. */
+          continue;
+        }
+
+        if ((lm_announce >= 2) && (!found_lm_clients))
+        {
+          /* has been set to 2 (Auto) but no LM clients detected (yet). */
+          continue;
+        }
+
+        /* 
+         * lm announce was set or we have seen lm announcements, so do
+         * a lm announcement of host removed.
+         */
+
+        send_lm_host_announcement(subrec, work, servrec, 0);
+      }
+    }
+  }
+}
+
+/****************************************************************************
+  Do all the "remote" announcements. These are used to put ourselves
+  on a remote browse list. They are done blind, no checking is done to
+  see if there is actually a local master browser at the other end.
+  **************************************************************************/
+
+void announce_remote(time_t t)
+{
+  char *s;
+  const char *ptr;
+  static time_t last_time = 0;
+  pstring s2;
+  struct in_addr addr;
+  char *comment;
+  int stype = lp_default_server_announce();
+
+  if (last_time && (t < (last_time + REMOTE_ANNOUNCE_INTERVAL)))
+    return;
+
+  last_time = t;
+
+  s = lp_remote_announce();
+  if (!*s)
+    return;
+
+  comment = string_truncate(lp_serverstring(), MAX_SERVER_STRING_LENGTH);
+
+  for (ptr=s; next_token(&ptr,s2,NULL,sizeof(s2)); ) 
+  {
+    /* The entries are of the form a.b.c.d/WORKGROUP with 
+       WORKGROUP being optional */
+    const char *wgroup;
+    char *pwgroup;
+    int i;
+
+    pwgroup = strchr_m(s2,'/');
+    if (pwgroup)
+      *pwgroup++ = 0;
+    if (!pwgroup || !*pwgroup)
+      wgroup = lp_workgroup();
+    else
+      wgroup = pwgroup;
+
+    addr = *interpret_addr2(s2);
+    
+    /* Announce all our names including aliases */
+    /* Give the ip address as the address of our first
+       broadcast subnet. */
+
+    for(i=0; my_netbios_names(i); i++) 
+    {
+      const char *name = my_netbios_names(i);
+
+      DEBUG(5,("announce_remote: Doing remote announce for server %s to IP %s.\n",
+                 name, inet_ntoa(addr) ));
+
+      send_announcement(FIRST_SUBNET, ANN_HostAnnouncement,
+                    name,                      /* From nbt name. */
+                    wgroup, 0x1d,              /* To nbt name. */
+                    addr,                      /* To ip. */
+                    REMOTE_ANNOUNCE_INTERVAL,  /* Time until next announce. */
+                    name,                      /* Name to announce. */
+                    stype,                     /* Type field. */
+                    comment);
+    }
+  }
+}
+
+/****************************************************************************
+  Implement the 'remote browse sync' feature Andrew added.
+  These are used to put our browse lists into remote browse lists.
+  **************************************************************************/
+
+void browse_sync_remote(time_t t)
+{  
+  char *s;
+  const char *ptr;
+  static time_t last_time = 0; 
+  pstring s2;
+  struct in_addr addr;
+  struct work_record *work;
+  pstring outbuf;
+  char *p;
+ 
+  if (last_time && (t < (last_time + REMOTE_ANNOUNCE_INTERVAL)))
+    return;
+   
+  last_time = t;
+
+  s = lp_remote_browse_sync();
+  if (!*s)
+    return;
+
+  /*
+   * We only do this if we are the local master browser
+   * for our workgroup on the firsst subnet.
+   */
+
+  if((work = find_workgroup_on_subnet(FIRST_SUBNET, lp_workgroup())) == NULL)
+  {   
+    DEBUG(0,("browse_sync_remote: Cannot find workgroup %s on subnet %s\n",
+           lp_workgroup(), FIRST_SUBNET->subnet_name ));
+    return;
+  }   
+         
+  if(!AM_LOCAL_MASTER_BROWSER(work))
+  {
+    DEBUG(5,("browse_sync_remote: We can only do this if we are a local master browser \
+for workgroup %s on subnet %s.\n", lp_workgroup(), FIRST_SUBNET->subnet_name ));
+    return;
+  } 
+
+  memset(outbuf,'\0',sizeof(outbuf));
+  p = outbuf;
+  SCVAL(p,0,ANN_MasterAnnouncement);
+  p++;
+
+  StrnCpy(p,lp_netbios_name(),15);
+  strupper(p);
+  p = skip_string(p,1);
+
+  for (ptr=s; next_token(&ptr,s2,NULL,sizeof(s2)); ) 
+  {
+    /* The entries are of the form a.b.c.d */
+    addr = *interpret_addr2(s2);
+
+    DEBUG(5,("announce_remote: Doing remote browse sync announce for server %s to IP %s.\n",
+                 lp_netbios_name(), inet_ntoa(addr) ));
+
+    send_mailslot(True, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
+          lp_netbios_name(), 0x0, "*", 0x0, addr, FIRST_SUBNET->myip, DGRAM_PORT);
+  }
+}