source/namedbresp.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    NBT netbios library routines
   5    Copyright (C) Andrew Tridgell 1994-1996
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21    Module name: namedbresp.c
  22
  23 */
  24
  25 #include "includes.h"
  26
  27 extern int ClientNMB;
  28 extern int ClientDGRAM;
  29
  30 extern struct subnet_record *subnetlist;
  31
  32 extern int DEBUGLEVEL;
  33
  34 extern pstring scope;
  35 extern pstring myname;
  36 extern struct in_addr ipzero;
  37
  38 int num_response_packets = 0;
  39
  40 /***************************************************************************
  41   add an expected response record into the list
  42   **************************************************************************/
  43 void add_response_record(struct subnet_record *d,
  44                                 struct response_record *n)
  45 {
  46   struct response_record *n2;
  47
  48   if (!d) return;
  49
  50   num_response_packets++; /* count of total number of packets still around */
  51
  52   DEBUG(4,("adding response record id:%d num_records:%d\n",
  53                    n->response_id, num_response_packets));
  54
  55   if (!d->responselist)
  56     {
  57       d->responselist = n;
  58       n->prev = NULL;
  59       n->next = NULL;
  60       return;
  61     }
  62
  63   for (n2 = d->responselist; n2->next; n2 = n2->next) ;
  64
  65   n2->next = n;
  66   n->next = NULL;
  67   n->prev = n2;
  68 }
  69
  70
  71 /***************************************************************************
  72   remove an expected response record from the list
  73   **************************************************************************/
  74 void remove_response_record(struct subnet_record *d,
  75                                 struct response_record *n)
  76 {
  77         if (!d) return;
  78
  79         if (n->prev) n->prev->next = n->next;
  80         if (n->next) n->next->prev = n->prev;
  81
  82         if (d->responselist == n) d->responselist = n->next;
  83
  84         free(n);
  85
  86         num_response_packets--; /* count of total number of packets still around */
  87 }
  88
  89
  90 /****************************************************************************
  91   create a name query response record
  92   **************************************************************************/
  93 struct response_record *make_response_queue_record(enum state_type state,
  94                                 int id,uint16 fd,
  95                                 int quest_type, char *name,int type, int nb_flags, time_t ttl,
  96                                 int server_type, char *my_name, char *my_comment,
  97                                 BOOL bcast,BOOL recurse,
  98                                 struct in_addr send_ip, struct in_addr reply_to_ip)
  99 {
 100   struct response_record *n;
 101
 102   if (!name || !name[0]) return NULL;
 103
 104   if (!(n = (struct response_record *)malloc(sizeof(*n))))
 105     return(NULL);
 106
 107   n->response_id = id;
 108   n->state = state;
 109   n->fd = fd;
 110   n->quest_type = quest_type;
 111   make_nmb_name(&n->name, name, type, scope);
 112   n->nb_flags = nb_flags;
 113   n->ttl = ttl;
 114   n->server_type = server_type;
 115   n->bcast = bcast;
 116   n->recurse = recurse;
 117   n->send_ip = send_ip;
 118   n->reply_to_ip = reply_to_ip;
 119   if(my_name)
 120     StrnCpy(n->my_name, my_name, sizeof(n->my_name)-1);
 121   else
 122     *n->my_name = 0;
 123   if(my_comment)
 124     StrnCpy(n->my_comment, my_comment, sizeof(n->my_comment)-1);
 125   else
 126     *n->my_comment = 0;
 127   n->repeat_interval = 1; /* XXXX should be in ms */
 128   n->repeat_count = 3; /* 3 retries */
 129   n->repeat_time = time(NULL) + n->repeat_interval; /* initial retry time */
 130
 131   n->num_msgs = 0;
 132
 133   return n;
 134 }
 135
 136
 137 /****************************************************************************
 138   find a response in a subnet's name query response list.
 139   **************************************************************************/
 140 struct response_record *find_response_record(struct subnet_record **d,
 141                                 uint16 id)
 142 {
 143   struct response_record *n;
 144
 145   if (!d) return NULL;
 146
 147   for ((*d) = subnetlist; (*d); (*d) = (*d)->next)
 148   {
 149     for (n = (*d)->responselist; n; n = n->next)
 150     {
 151       if (n->response_id == id) {
 152          DEBUG(4, ("found response record on %s: %d\n",
 153                                         inet_ntoa((*d)->bcast_ip), id));
 154          return n;
 155       }
 156     }
 157   }
 158
 159   *d = NULL;
 160
 161   return NULL;
 162 }
 163
 164