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 extern struct in_addr ipgrp;
  38
  39 int num_response_packets = 0;
  40
  41 /***************************************************************************
  42   add an expected response record into the list
  43   **************************************************************************/
  44 void add_response_record(struct subnet_record *d,
  45                                 struct response_record *n)
  46 {
  47   struct response_record *n2;
  48
  49   if (!d) return;
  50
  51   num_response_packets++; /* count of total number of packets still around */
  52
  53   DEBUG(4,("adding response record id:%d num_records:%d\n",
  54                    n->response_id, num_response_packets));
  55
  56   if (!d->responselist)
  57     {
  58       d->responselist = n;
  59       n->prev = NULL;
  60       n->next = NULL;
  61       return;
  62     }
  63
  64   for (n2 = d->responselist; n2->next; n2 = n2->next) ;
  65
  66   n2->next = n;
  67   n->next = NULL;
  68   n->prev = n2;
  69 }
  70
  71
  72 /***************************************************************************
  73   remove an expected response record from the list
  74   **************************************************************************/
  75 void remove_response_record(struct subnet_record *d,
  76                                 struct response_record *n)
  77 {
  78         if (!d) return;
  79
  80         if (n->prev) n->prev->next = n->next;
  81         if (n->next) n->next->prev = n->prev;
  82
  83         if (d->responselist == n) d->responselist = n->next;
  84
  85         free(n);
  86
  87         num_response_packets--; /* count of total number of packets still around */
  88 }
  89
  90
  91 /****************************************************************************
  92   create a name query response record
  93   **************************************************************************/
  94 struct response_record *make_response_queue_record(enum state_type state,
  95                                 int id,uint16 fd,
  96                                 int quest_type, char *name,int type, int nb_flags, time_t ttl,
  97                                 int server_type, char *my_name, char *my_comment,
  98                                 BOOL bcast,BOOL recurse,
  99                                 struct in_addr send_ip, struct in_addr reply_to_ip)
 100 {
 101   struct response_record *n;
 102
 103   if (!name || !name[0]) return NULL;
 104
 105   if (!(n = (struct response_record *)malloc(sizeof(*n))))
 106     return(NULL);
 107
 108   n->response_id = id;
 109   n->state = state;
 110   n->fd = fd;
 111   n->quest_type = quest_type;
 112   make_nmb_name(&n->name, name, type, scope);
 113   n->nb_flags = nb_flags;
 114   n->ttl = ttl;
 115   n->server_type = server_type;
 116   n->bcast = bcast;
 117   n->recurse = recurse;
 118   n->send_ip = send_ip;
 119   n->reply_to_ip = reply_to_ip;
 120   StrnCpy(my_name   , n->my_name   , sizeof(n->my_name   )-1);
 121   StrnCpy(my_comment, n->my_comment, sizeof(n->my_comment)-1);
 122
 123   n->repeat_interval = 1; /* XXXX should be in ms */
 124   n->repeat_count = 3; /* 3 retries */
 125   n->repeat_time = time(NULL) + n->repeat_interval; /* initial retry time */
 126
 127   n->num_msgs = 0;
 128
 129   return n;
 130 }
 131
 132
 133 /****************************************************************************
 134   find a response in a subnet's name query response list.
 135   **************************************************************************/
 136 struct response_record *find_response_record(struct subnet_record **d,
 137                                 uint16 id)
 138 {
 139   struct response_record *n;
 140
 141   if (!d) return NULL;
 142
 143   for ((*d) = subnetlist; (*d); (*d) = (*d)->next)
 144   {
 145     for (n = (*d)->responselist; n; n = n->next)
 146     {
 147       if (n->response_id == id) {
 148          DEBUG(4, ("found response record on %s: %d\n",
 149                                         inet_ntoa((*d)->bcast_ip), id));
 150          return n;
 151       }
 152     }
 153   }
 154
 155   *d = NULL;
 156
 157   return NULL;
 158 }
 159
 160