src/monitor.c

   1 /*
   2  * ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
   3  * monitor.c - Code for server-side notify lists
   4  *
   5  * Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk>
   6  * Copyright (C) 2005 ircd-ratbox development team
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are
  10  * met:
  11  *
  12  * 1.Redistributions of source code must retain the above copyright notice,
  13  *   this list of conditions and the following disclaimer.
  14  * 2.Redistributions in binary form must reproduce the above copyright
  15  *   notice, this list of conditions and the following disclaimer in the
  16  *   documentation and/or other materials provided with the distribution.
  17  * 3.The name of the author may not be used to endorse or promote products
  18  *   derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  24  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  26  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  28  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  29  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * $Id: monitor.c 3520 2007-06-30 22:15:35Z jilles $
  33  */
  34 #include "stdinc.h"
  35 #include "client.h"
  36 #include "monitor.h"
  37 #include "hash.h"
  38 #include "numeric.h"
  39 #include "send.h"
  40
  41 struct monitor *monitorTable[MONITOR_HASH_SIZE];
  42 static rb_bh *monitor_heap;
  43
  44 void
  45 init_monitor(void)
  46 {
  47         monitor_heap = rb_bh_create(sizeof(struct monitor), MONITOR_HEAP_SIZE, "monitor_heap");
  48 }
  49
  50 static inline unsigned int
  51 hash_monitor_nick(const char *name)
  52 {
  53         return fnv_hash_upper((const unsigned char *)name, MONITOR_HASH_BITS);
  54 }
  55
  56 struct monitor *
  57 find_monitor(const char *name, int add)
  58 {
  59         struct monitor *monptr;
  60
  61         unsigned int hashv = hash_monitor_nick(name);
  62
  63         for(monptr = monitorTable[hashv]; monptr; monptr = monptr->hnext)
  64         {
  65                 if(!irccmp(monptr->name, name))
  66                         return monptr;
  67         }
  68
  69         if(add)
  70         {
  71                 monptr = rb_bh_alloc(monitor_heap);
  72                 rb_strlcpy(monptr->name, name, sizeof(monptr->name));
  73
  74                 monptr->hnext = monitorTable[hashv];
  75                 monitorTable[hashv] = monptr;
  76
  77                 return monptr;
  78         }
  79
  80         return NULL;
  81 }
  82
  83 void
  84 free_monitor(struct monitor *monptr)
  85 {
  86         rb_bh_free(monitor_heap, monptr);
  87 }
  88
  89 /* monitor_signon()
  90  *
  91  * inputs       - client who has just connected
  92  * outputs      -
  93  * side effects - notifies any clients monitoring this nickname that it has
  94  *                connected to the network
  95  */
  96 void
  97 monitor_signon(struct Client *client_p)
  98 {
  99         char buf[USERHOST_REPLYLEN];
 100         struct monitor *monptr = find_monitor(client_p->name, 0);
 101
 102         /* noones watching this nick */
 103         if(monptr == NULL)
 104                 return;
 105
 106         rb_snprintf(buf, sizeof(buf), "%s!%s@%s", client_p->name, client_p->username, client_p->host);
 107
 108         sendto_monitor(monptr, form_str(RPL_MONONLINE), me.name, "*", buf);
 109 }
 110
 111 /* monitor_signoff()
 112  *
 113  * inputs       - client who is exiting
 114  * outputs      -
 115  * side effects - notifies any clients monitoring this nickname that it has
 116  *                left the network
 117  */
 118 void
 119 monitor_signoff(struct Client *client_p)
 120 {
 121         struct monitor *monptr = find_monitor(client_p->name, 0);
 122
 123         /* noones watching this nick */
 124         if(monptr == NULL)
 125                 return;
 126
 127         sendto_monitor(monptr, form_str(RPL_MONOFFLINE), me.name, "*",
 128                         client_p->name);
 129 }
 130
 131 void
 132 clear_monitor(struct Client *client_p)
 133 {
 134         struct monitor *monptr;
 135         rb_dlink_node *ptr, *next_ptr;
 136
 137         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->monitor_list.head)
 138         {
 139                 monptr = ptr->data;
 140
 141                 rb_dlinkFindDestroy(client_p, &monptr->users);
 142                 rb_free_rb_dlink_node(ptr);
 143         }
 144
 145         client_p->localClient->monitor_list.head = client_p->localClient->monitor_list.tail = NULL;
 146         client_p->localClient->monitor_list.length = 0;
 147 }