source4/nbt_server/nbt_server.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    NBT server structures
   5
   6    Copyright (C) Andrew Tridgell        2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "libcli/nbt/libnbt.h"
  24
  25 /*
  26    a list of our registered names on each interface
  27 */
  28 struct nbtd_iface_name {
  29         struct nbtd_iface_name *next, *prev;
  30         struct nbtd_interface *iface;
  31         struct nbt_name name;
  32         uint16_t nb_flags;
  33         struct timeval registration_time;
  34         uint32_t ttl;
  35
  36         /* if registered with a wins server, then this lists the server being
  37            used */
  38         char *wins_server;
  39 };
  40
  41
  42 /* a list of network interfaces we are listening on */
  43 struct nbtd_interface {
  44         struct nbtd_interface *next, *prev;
  45         struct nbtd_server *nbtsrv;
  46         const char *ip_address;
  47         const char *bcast_address;
  48         const char *netmask;
  49         struct nbt_name_socket *nbtsock;
  50         struct nbtd_iface_name *names;
  51 };
  52
  53
  54 /*
  55   top level context structure for the nbt server
  56 */
  57 struct nbtd_server {
  58         struct task_server *task;
  59
  60         /* the list of local network interfaces */
  61         struct nbtd_interface *interfaces;
  62
  63         /* broadcast interface used for receiving packets only */
  64         struct nbtd_interface *bcast_interface;
  65
  66         /* wins client interface - used for registering and refreshing
  67            our names with a WINS server */
  68         struct nbtd_interface *wins_interface;
  69
  70         struct wins_server *winssrv;
  71 };
  72
  73
  74
  75 /* check a condition on an incoming packet */
  76 #define NBTD_ASSERT_PACKET(packet, src_address, test) do { \
  77         if (!(test)) { \
  78                 nbtd_bad_packet(packet, src_address, #test); \
  79                 return; \
  80         } \
  81 } while (0)
  82
  83 /* this copes with the nasty hack that is the type 0x1c name */
  84 #define IS_GROUP_NAME(name, nb_flags) \
  85         ((name)->type != NBT_NAME_LOGON && (nb_flags & NBT_NM_GROUP))