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 #include "stdinc.h"
  33 #include "client.h"
  34 #include "monitor.h"
  35 #include "hash.h"
  36 #include "numeric.h"
  37 #include "send.h"
  38 #include "rb_radixtree.h"
  39
  40 static rb_radixtree *monitor_tree;
  41
  42 void
  43 init_monitor(void)
  44 {
  45         monitor_tree = rb_radixtree_create("monitor lists", irccasecanon);
  46 }
  47
  48 struct monitor *
  49 find_monitor(const char *name, int add)
  50 {
  51         struct monitor *monptr;
  52
  53         monptr = rb_radixtree_retrieve(monitor_tree, name);
  54         if (monptr != NULL)
  55                 return monptr;
  56
  57         if(add)
  58         {
  59                 monptr = rb_malloc(sizeof(*monptr));
  60                 rb_strlcpy(monptr->name, name, sizeof(monptr->name));
  61                 rb_radixtree_add(monitor_tree, monptr->name, monptr);
  62
  63                 return monptr;
  64         }
  65
  66         return NULL;
  67 }
  68
  69 void
  70 free_monitor(struct monitor *monptr)
  71 {
  72         if (rb_dlink_list_length(&monptr->users) > 0)
  73                 return;
  74
  75         rb_radixtree_delete(monitor_tree, monptr->name);
  76         rb_free(monptr);
  77 }
  78
  79 /* monitor_signon()
  80  *
  81  * inputs       - client who has just connected
  82  * outputs      -
  83  * side effects - notifies any clients monitoring this nickname that it has
  84  *                connected to the network
  85  */
  86 void
  87 monitor_signon(struct Client *client_p)
  88 {
  89         char buf[USERHOST_REPLYLEN];
  90         struct monitor *monptr = find_monitor(client_p->name, 0);
  91
  92         /* noones watching this nick */
  93         if(monptr == NULL)
  94                 return;
  95
  96         snprintf(buf, sizeof(buf), "%s!%s@%s", client_p->name, client_p->username, client_p->host);
  97
  98         sendto_monitor(client_p, monptr, form_str(RPL_MONONLINE), me.name, "*", buf);
  99 }
 100
 101 /* monitor_signoff()
 102  *
 103  * inputs       - client who is exiting
 104  * outputs      -
 105  * side effects - notifies any clients monitoring this nickname that it has
 106  *                left the network
 107  */
 108 void
 109 monitor_signoff(struct Client *client_p)
 110 {
 111         struct monitor *monptr = find_monitor(client_p->name, 0);
 112
 113         /* noones watching this nick */
 114         if(monptr == NULL)
 115                 return;
 116
 117         sendto_monitor(client_p, monptr, form_str(RPL_MONOFFLINE), me.name, "*",
 118                         client_p->name);
 119 }
 120
 121 void
 122 clear_monitor(struct Client *client_p)
 123 {
 124         struct monitor *monptr;
 125         rb_dlink_node *ptr, *next_ptr;
 126
 127         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->monitor_list.head)
 128         {
 129                 monptr = ptr->data;
 130
 131                 rb_dlinkFindDestroy(client_p, &monptr->users);
 132                 rb_free_rb_dlink_node(ptr);
 133
 134                 free_monitor(monptr);
 135         }
 136
 137         client_p->localClient->monitor_list.head = client_p->localClient->monitor_list.tail = NULL;
 138         client_p->localClient->monitor_list.length = 0;
 139 }