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, 291 insertions, 0 deletions

diff --git a/source3/nmbd/nmbd_subnetdb.c b/source3/nmbd/nmbd_subnetdb.c
new file mode 100644
index 0000000000..93aecc21f2
--- /dev/null
+++ b/source3/nmbd/nmbd_subnetdb.c
@@ -0,0 +1,291 @@
+/* 
+   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.
+   
+   Revision History:
+
+*/
+
+#include "includes.h"
+#include "smb.h"
+
+extern int ClientNMB;
+extern int ClientDGRAM;
+extern int global_nmb_port;
+
+extern int DEBUGLEVEL;
+
+extern pstring myname;
+extern fstring myworkgroup;
+extern char **my_netbios_names;
+extern struct in_addr ipzero;
+
+/* This is the broadcast subnets database. */
+struct subnet_record *subnetlist = NULL;
+
+/* Extra subnets - keep these separate so enumeration code doesn't
+   run onto it by mistake. */
+
+struct subnet_record *unicast_subnet = NULL;
+struct subnet_record *remote_broadcast_subnet = NULL;
+struct subnet_record *wins_server_subnet = NULL;
+
+extern uint16 samba_nb_type; /* Samba's NetBIOS name type. */
+
+/****************************************************************************
+  Add a subnet into the list.
+  **************************************************************************/
+
+static void add_subnet(struct subnet_record *subrec)
+{
+  struct subnet_record *subrec2;
+
+  if (!subnetlist)
+  {
+    subnetlist = subrec;
+    subrec->prev = NULL;
+    subrec->next = NULL;
+    return;
+  }
+
+  for (subrec2 = subnetlist; subrec2->next; subrec2 = subrec2->next)
+    ;
+
+  subrec2->next = subrec;
+  subrec->next = NULL;
+  subrec->prev = subrec2;
+}
+
+/****************************************************************************
+  Create a subnet entry.
+  ****************************************************************************/
+
+static struct subnet_record *make_subnet(char *name, enum subnet_type type,
+                                         struct in_addr myip, struct in_addr bcast_ip, 
+                                         struct in_addr mask_ip)
+{
+  struct subnet_record *subrec = NULL;
+  int nmb_sock, dgram_sock;
+
+  /* Check if we are creating a non broadcast subnet - if so don't create
+     sockets.
+   */
+
+  if(type != NORMAL_SUBNET)
+  {
+    nmb_sock = -1;
+    dgram_sock = -1;
+  }
+  else
+  {
+    /*
+     * Attempt to open the sockets on port 137/138 for this interface
+     * and bind them.
+     * Fail the subnet creation if this fails.
+     */
+
+    if((nmb_sock = open_socket_in(SOCK_DGRAM, global_nmb_port,0, myip.s_addr)) == -1)
+    {
+      DEBUG(0,("make_subnet: Failed to open nmb socket on interface %s \
+for port %d. Error was %s\n", inet_ntoa(myip), global_nmb_port, strerror(errno)));
+      return NULL;
+    }
+
+    if((dgram_sock = open_socket_in(SOCK_DGRAM,DGRAM_PORT,3, myip.s_addr)) == -1)
+    {
+      DEBUG(0,("make_subnet: Failed to open dgram socket on interface %s \
+for port %d. Error was %s\n", inet_ntoa(myip), DGRAM_PORT, strerror(errno)));
+      return NULL;
+    }
+
+    /* Make sure we can broadcast from these sockets. */
+    set_socket_options(nmb_sock,"SO_BROADCAST");
+    set_socket_options(dgram_sock,"SO_BROADCAST");
+
+  }
+
+  subrec = (struct subnet_record *)malloc(sizeof(*subrec));
+  
+  if (!subrec) 
+  {
+    DEBUG(0,("make_subnet: malloc fail !\n"));
+    close(nmb_sock);
+    close(dgram_sock);
+    return(NULL);
+  }
+  
+  bzero((char *)subrec,sizeof(*subrec));
+  
+  if((subrec->subnet_name = strdup(name)) == NULL)
+  {
+    DEBUG(0,("make_subnet: malloc fail for subnet name !\n"));
+    close(nmb_sock);
+    close(dgram_sock);
+    free((char *)subrec);
+    return(NULL);
+  }
+
+  DEBUG(2, ("making subnet name:%s ", name ));
+  DEBUG(2, ("Broadcast address:%s ", inet_ntoa(bcast_ip)));
+  DEBUG(2, ("Subnet mask:%s\n", inet_ntoa(mask_ip)));
+ 
+  subrec->namelist_changed = False;
+  subrec->work_changed = False;
+ 
+  subrec->bcast_ip = bcast_ip;
+  subrec->mask_ip  = mask_ip;
+  subrec->myip = myip;
+  subrec->type = type;
+  subrec->nmb_sock = nmb_sock;
+  subrec->dgram_sock = dgram_sock;
+  
+  return subrec;
+}
+
+/****************************************************************************
+  Create subnet entries.
+**************************************************************************/
+
+BOOL create_subnets()
+{    
+  int num_interfaces = iface_count();
+  int i;
+  struct in_addr unicast_ip;
+
+  if(num_interfaces == 0)
+  {
+    DEBUG(0,("create_subnets: No local interfaces !\n"));
+    return False;
+  }
+
+  /* 
+   * Create subnets from all the local interfaces and thread them onto
+   * the linked list. 
+   */
+
+  for (i = 0 ; i < num_interfaces; i++)
+  {
+    struct subnet_record *subrec;
+    struct interface *iface = get_interface(i);
+
+    if((subrec = make_subnet(inet_ntoa(iface->ip), NORMAL_SUBNET,
+                 iface->ip, iface->bcast,iface->nmask)) == NULL)
+      return False;
+    add_subnet(subrec);
+  }
+
+  /* 
+   * If we have been configured to use a WINS server, then try and
+   * get the ip address of it here. If we are the WINS server then
+   * set the unicast subnet address to be the first of our own real
+   * addresses.
+   */
+
+  if(*lp_wins_server())
+  {
+    struct in_addr real_wins_ip;
+    real_wins_ip = *interpret_addr2(lp_wins_server());
+
+    if (!zero_ip(real_wins_ip))
+    {
+      unicast_ip = real_wins_ip;
+    }
+    else
+    {
+      /* The smb.conf's wins server parameter MUST be a host_name
+         or an ip_address. */
+      DEBUG(0,("invalid smb.conf parameter 'wins server'\n"));
+      return False;
+    }
+  } 
+  else if(lp_we_are_a_wins_server())
+  {
+    /* Pick the first interface ip address as the WINS server ip. */
+    unicast_ip = *iface_n_ip(0);
+  }
+  else
+  {
+    /* We should not be using a WINS server at all. Set the
+      ip address of the subnet to be zero. */
+    unicast_ip = ipzero;
+  }
+
+  /*
+   * Create the unicast and remote broadcast subnets.
+   * Don't put these onto the linked list.
+   * The ip address of the unicast subnet is set to be
+   * the WINS server address, if it exists, or ipzero if not.
+   */
+
+  unicast_subnet = make_subnet( "UNICAST_SUBNET", UNICAST_SUBNET, 
+                                 unicast_ip, unicast_ip, unicast_ip);
+
+  remote_broadcast_subnet = make_subnet( "REMOTE_BROADCAST_SUBNET",
+                                         REMOTE_BROADCAST_SUBNET,
+                                         ipzero, ipzero, ipzero);
+
+  if((unicast_subnet == NULL) || (remote_broadcast_subnet == NULL))
+    return False;
+
+  /* 
+   * If we are WINS server, create the WINS_SERVER_SUBNET - don't put on
+   * the linked list.
+   */
+
+  if (lp_we_are_a_wins_server())
+  {
+    if((wins_server_subnet = make_subnet("WINS_SERVER_SUBNET",
+                                       WINS_SERVER_SUBNET, 
+                                       ipzero, ipzero, ipzero)) == NULL)
+      return False;
+  }
+
+  return True;
+}
+
+/*******************************************************************
+Function to tell us if we can use the unicast subnet.
+******************************************************************/
+
+BOOL we_are_a_wins_client()
+{
+  static int cache_we_are_a_wins_client = -1;
+
+  if(cache_we_are_a_wins_client == -1)
+    cache_we_are_a_wins_client = (ip_equal(ipzero, unicast_subnet->myip) ? 
+                                  False : True);
+
+  return cache_we_are_a_wins_client;
+}
+
+/*******************************************************************
+Access function used by NEXT_SUBNET_INCLUDING_UNICAST
+******************************************************************/
+
+struct subnet_record *get_next_subnet_maybe_unicast(struct subnet_record *subrec)
+{
+  if(subrec == unicast_subnet)
+    return NULL;
+  else if((subrec->next == NULL) && we_are_a_wins_client())
+    return unicast_subnet;
+  else
+    return subrec->next;
+}