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  */
  33 #include "stdinc.h"
  34 #include "client.h"
  35 #include "monitor.h"
  36 #include "hash.h"
  37 #include "numeric.h"
  38
  39 struct monitor *monitorTable[MONITOR_HASH_SIZE];
  40 static rb_bh *monitor_heap;
  41
  42 void
  43 init_monitor(void)
  44 {
  45         monitor_heap = rb_bh_create(sizeof(struct monitor), MONITOR_HEAP_SIZE, "monitor_heap");
  46 }
  47
  48 static inline unsigned int
  49 hash_monitor_nick(const char *name)
  50 {
  51         return fnv_hash_upper((const unsigned char *)name, MONITOR_HASH_BITS);
  52 }
  53
  54 struct monitor *
  55 find_monitor(const char *name, int add)
  56 {
  57         struct monitor *monptr;
  58
  59         unsigned int hashv = hash_monitor_nick(name);
  60
  61         for(monptr = monitorTable[hashv]; monptr; monptr = monptr->hnext)
  62         {
  63                 if(!irccmp(monptr->name, name))
  64                         return monptr;
  65         }
  66
  67         if(add)
  68         {
  69                 monptr = rb_bh_alloc(monitor_heap);
  70                 rb_strlcpy(monptr->name, name, sizeof(monptr->name));
  71
  72                 monptr->hnext = monitorTable[hashv];
  73                 monitorTable[hashv] = monptr;
  74
  75                 return monptr;
  76         }
  77
  78         return NULL;
  79 }
  80
  81 void
  82 free_monitor(struct monitor *monptr)
  83 {
  84         rb_bh_free(monitor_heap, monptr);
  85 }
  86
  87 /* monitor_signon()
  88  *
  89  * inputs       - client who has just connected
  90  * outputs      -
  91  * side effects - notifies any clients monitoring this nickname that it has
  92  *                connected to the network
  93  */
  94 void
  95 monitor_signon(struct Client *client_p)
  96 {
  97         char buf[USERHOST_REPLYLEN];
  98         struct monitor *monptr = find_monitor(client_p->name, 0);
  99
 100         /* noones watching this nick */
 101         if(monptr == NULL)
 102                 return;
 103
 104         rb_snprintf(buf, sizeof(buf), "%s!%s@%s", client_p->name, client_p->username, client_p->host);
 105
 106         sendto_monitor(monptr, form_str(RPL_MONONLINE), me.name, "*", buf);
 107 }
 108
 109 /* monitor_signoff()
 110  *
 111  * inputs       - client who is exiting
 112  * outputs      -
 113  * side effects - notifies any clients monitoring this nickname that it has
 114  *                left the network
 115  */
 116 void
 117 monitor_signoff(struct Client *client_p)
 118 {
 119         struct monitor *monptr = find_monitor(client_p->name, 0);
 120
 121         /* noones watching this nick */
 122         if(monptr == NULL)
 123                 return;
 124
 125         sendto_monitor(monptr, form_str(RPL_MONOFFLINE), me.name, "*",
 126                         client_p->name);
 127 }
 128
 129 void
 130 clear_monitor(struct Client *client_p)
 131 {
 132         struct monitor *monptr;
 133         rb_dlink_node *ptr, *next_ptr;
 134
 135         RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->monitor_list.head)
 136         {
 137                 monptr = ptr->data;
 138
 139                 rb_dlinkFindDestroy(client_p, &monptr->users);
 140                 rb_free_rb_dlink_node(ptr);
 141         }
 142
 143         client_p->localClient->monitor_list.head = client_p->localClient->monitor_list.tail = NULL;
 144         client_p->localClient->monitor_list.length = 0;
 145 }