ircd/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 #include "irc_radixtree.h"
  41
  42 static struct irc_radixtree *monitor_tree;
  43
  44 void
  45 init_monitor(void)
  46 {
  47         monitor_tree = irc_radixtree_create("monitor lists", irc_radixtree_irccasecanon);
  48 }
  49
  50 struct monitor *
  51 find_monitor(const char *name, int add)
  52 {
  53         struct monitor *monptr;
  54
  55         monptr = irc_radixtree_retrieve(monitor_tree, name);
  56         if (monptr != NULL)
  57                 return monptr;
  58
  59         if(add)
  60         {
  61                 monptr = rb_malloc(sizeof(*monptr));
  62                 rb_strlcpy(monptr->name, name, sizeof(monptr->name));
  63                 irc_radixtree_add(monitor_tree, monptr->name, monptr);
  64
  65                 return monptr;
  66         }
  67
  68         return NULL;
  69 }
  70
  71 void
  72 free_monitor(struct monitor *monptr)
  73 {
  74         if (rb_dlink_list_length(&monptr->users) > 0)
  75                 return;
  76
  77         irc_radixtree_delete(monitor_tree, monptr->name);
  78         rb_free(monptr);
  79 }
  80
  81 /* monitor_signon()
  82  *
  83  * inputs       - client who has just connected
  84  * outputs      -
  85  * side effects - notifies any clients monitoring this nickname that it has
  86  *                connected to the network
  87  */
  88 void
  89 monitor_signon(struct Client *client_p)
  90 {
  91         char buf[USERHOST_REPLYLEN];
  92         struct monitor *monptr = find_monitor(client_p->name, 0);
  93
  94         /* noones watching this nick */
  95         if(monptr == NULL)
  96                 return;
  97
  98         snprintf(buf, sizeof(buf), "%s!%s@%s", client_p->name, client_p->username, client_p->host);
  99
 100         sendto_monitor(monptr, form_str(RPL_MONONLINE), me.name, "*", buf);
 101 }
 102
 103 /* monitor_signoff()
 104  *
 105  * inputs       - client who is exiting
 106  * outputs      -
 107  * side effects - notifies any clients monitoring this nickname that it has
 108  *                left the network
 109  */
 110 void
 111 monitor_signoff(struct Client *client_p)
 112 {
 113         struct monitor *monptr = find_monitor(client_p->name, 0);
 114
 115         /* noones watching this nick */
 116         if(monptr == NULL)
 117                 return;
 118
 119         sendto_monitor(monptr, form_str(RPL_MONOFFLINE), me.name, "*",
 120                         client_p->name);
 121 }
 122
 123 void
 124 clear_monitor(struct Client *client_p)
 125 {
 126         struct monitor *monptr;
 127         rb_dlink_node *ptr, *next_ptr;
 128
 129         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->monitor_list.head)
 130         {
 131                 monptr = ptr->data;
 132
 133                 rb_dlinkFindDestroy(client_p, &monptr->users);
 134                 rb_free_rb_dlink_node(ptr);
 135
 136                 free_monitor(monptr);
 137         }
 138
 139         client_p->localClient->monitor_list.head = client_p->localClient->monitor_list.tail = NULL;
 140         client_p->localClient->monitor_list.length = 0;
 141 }