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
  40 struct monitor *monitorTable[MONITOR_HASH_SIZE];
  41 static rb_bh *monitor_heap;
  42
  43 void
  44 init_monitor(void)
  45 {
  46         monitor_heap = rb_bh_create(sizeof(struct monitor), MONITOR_HEAP_SIZE, "monitor_heap");
  47 }
  48
  49 static inline unsigned int
  50 hash_monitor_nick(const char *name)
  51 {
  52         return fnv_hash_upper((const unsigned char *)name, MONITOR_HASH_BITS);
  53 }
  54
  55 struct monitor *
  56 find_monitor(const char *name, int add)
  57 {
  58         struct monitor *monptr;
  59
  60         unsigned int hashv = hash_monitor_nick(name);
  61
  62         for(monptr = monitorTable[hashv]; monptr; monptr = monptr->hnext)
  63         {
  64                 if(!irccmp(monptr->name, name))
  65                         return monptr;
  66         }
  67
  68         if(add)
  69         {
  70                 monptr = rb_bh_alloc(monitor_heap);
  71                 rb_strlcpy(monptr->name, name, sizeof(monptr->name));
  72
  73                 monptr->hnext = monitorTable[hashv];
  74                 monitorTable[hashv] = monptr;
  75
  76                 return monptr;
  77         }
  78
  79         return NULL;
  80 }
  81
  82 void
  83 free_monitor(struct monitor *monptr)
  84 {
  85         rb_bh_free(monitor_heap, monptr);
  86 }
  87
  88 /* monitor_signon()
  89  *
  90  * inputs       - client who has just connected
  91  * outputs      -
  92  * side effects - notifies any clients monitoring this nickname that it has
  93  *                connected to the network
  94  */
  95 void
  96 monitor_signon(struct Client *client_p)
  97 {
  98         char buf[USERHOST_REPLYLEN];
  99         struct monitor *monptr = find_monitor(client_p->name, 0);
 100
 101         /* noones watching this nick */
 102         if(monptr == NULL)
 103                 return;
 104
 105         rb_snprintf(buf, sizeof(buf), "%s!%s@%s", client_p->name, client_p->username, client_p->host);
 106
 107         sendto_monitor(monptr, form_str(RPL_MONONLINE), me.name, "*", buf);
 108 }
 109
 110 /* monitor_signoff()
 111  *
 112  * inputs       - client who is exiting
 113  * outputs      -
 114  * side effects - notifies any clients monitoring this nickname that it has
 115  *                left the network
 116  */
 117 void
 118 monitor_signoff(struct Client *client_p)
 119 {
 120         struct monitor *monptr = find_monitor(client_p->name, 0);
 121
 122         /* noones watching this nick */
 123         if(monptr == NULL)
 124                 return;
 125
 126         sendto_monitor(monptr, form_str(RPL_MONOFFLINE), me.name, "*",
 127                         client_p->name);
 128 }
 129
 130 void
 131 clear_monitor(struct Client *client_p)
 132 {
 133         struct monitor *monptr;
 134         rb_dlink_node *ptr, *next_ptr;
 135
 136         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->monitor_list.head)
 137         {
 138                 monptr = ptr->data;
 139
 140                 rb_dlinkFindDestroy(client_p, &monptr->users);
 141                 rb_free_rb_dlink_node(ptr);
 142         }
 143
 144         client_p->localClient->monitor_list.head = client_p->localClient->monitor_list.tail = NULL;
 145         client_p->localClient->monitor_list.length = 0;
 146 }