source/namedbresp.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    NBT netbios library routines
   5    Copyright (C) Andrew Tridgell 1994-1997
   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
  29 extern struct subnet_record *subnetlist;
  30
  31 extern int DEBUGLEVEL;
  32
  33 extern pstring scope;
  34 extern pstring myname;
  35 extern struct in_addr ipzero;
  36
  37 int num_response_packets = 0;
  38
  39 /***************************************************************************
  40   add an expected response record into the list
  41   **************************************************************************/
  42 void add_response_record(struct subnet_record *d,
  43                                 struct response_record *n)
  44 {
  45   struct response_record *n2;
  46
  47   if (!d) return;
  48
  49   num_response_packets++; /* count of total number of packets still around */
  50
  51   DEBUG(4,("adding response record id:%d num_records:%d\n",
  52                    n->response_id, num_response_packets));
  53
  54   if (!d->responselist)
  55     {
  56       d->responselist = n;
  57       n->prev = NULL;
  58       n->next = NULL;
  59       return;
  60     }
  61
  62   for (n2 = d->responselist; n2->next; n2 = n2->next) ;
  63
  64   n2->next = n;
  65   n->next = NULL;
  66   n->prev = n2;
  67 }
  68
  69
  70 /***************************************************************************
  71   remove an expected response record from the list
  72   **************************************************************************/
  73 void remove_response_record(struct subnet_record *d,
  74                                 struct response_record *n)
  75 {
  76         if (!d) return;
  77
  78         if (n->prev) n->prev->next = n->next;
  79         if (n->next) n->next->prev = n->prev;
  80
  81         if (d->responselist == n) d->responselist = n->next;
  82
  83         free(n);
  84
  85         num_response_packets--; /* count of total number of packets still around */
  86 }
  87
  88
  89 /****************************************************************************
  90   create a name query response record
  91   **************************************************************************/
  92 struct response_record *make_response_queue_record(enum state_type state,
  93                                 int id,uint16 fd,
  94                                 int quest_type, char *name,int type, int nb_flags, time_t ttl,
  95                                 int server_type, char *my_name, char *my_comment,
  96                                 BOOL bcast,BOOL recurse,
  97                                 struct in_addr send_ip, struct in_addr reply_to_ip,
  98                                 int reply_id)
  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   bzero((char *)n, sizeof(*n));
 108
 109   n->response_id = id;
 110   n->state = state;
 111   n->fd = fd;
 112   n->quest_type = quest_type;
 113   make_nmb_name(&n->name, name, type, scope);
 114   n->nb_flags = nb_flags;
 115   n->ttl = ttl;
 116   n->server_type = server_type;
 117   n->bcast = bcast;
 118   n->recurse = recurse;
 119   n->send_ip = send_ip;
 120   n->reply_to_ip = reply_to_ip;
 121   n->reply_id = reply_id;
 122   if(my_name)
 123     StrnCpy(n->my_name, my_name, sizeof(n->my_name)-1);
 124   else
 125     *n->my_name = 0;
 126   if(my_comment)
 127     StrnCpy(n->my_comment, my_comment, sizeof(n->my_comment)-1);
 128   else
 129     *n->my_comment = 0;
 130   n->repeat_interval = 1; /* XXXX should be in ms */
 131   n->repeat_count = 3; /* 3 retries */
 132   n->repeat_time = time(NULL) + n->repeat_interval; /* initial retry time */
 133
 134   n->num_msgs = 0;
 135
 136   return n;
 137 }
 138
 139
 140 /****************************************************************************
 141   find a response in a subnet's name query response list.
 142   **************************************************************************/
 143 struct response_record *find_response_record(struct subnet_record **d,
 144                                 uint16 id)
 145 {
 146   struct response_record *n;
 147
 148   if (!d) return NULL;
 149
 150   for ((*d) = FIRST_SUBNET; (*d); (*d) = NEXT_SUBNET_INCLUDING_WINS(*d))
 151   {
 152     for (n = (*d)->responselist; n; n = n->next)
 153     {
 154       if (n->response_id == id) {
 155          DEBUG(4, ("found response record on %s: %d\n",
 156                                         inet_ntoa((*d)->bcast_ip), id));
 157          return n;
 158       }
 159     }
 160   }
 161
 162   *d = NULL;
 163
 164   return NULL;
 165 }
 166
 167