elemental-ircd/src/monitor.c

181 lines
4.7 KiB
C

/*
* ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
* monitor.c - Code for server-side notify lists
*
* Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk>
* Copyright (C) 2005 ircd-ratbox development team
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1.Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2.Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3.The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $Id: monitor.c 3520 2007-06-30 22:15:35Z jilles $
*/
#include "stdinc.h"
#include "tools.h"
#include "client.h"
#include "memory.h"
#include "balloc.h"
#include "monitor.h"
#include "hash.h"
#include "event.h"
#include "numeric.h"
static struct monitor *monitorTable[MONITOR_HASH_SIZE];
BlockHeap *monitor_heap;
static void cleanup_monitor(void *unused);
void
init_monitor(void)
{
monitor_heap = BlockHeapCreate(sizeof(struct monitor), MONITOR_HEAP_SIZE);
eventAddIsh("cleanup_monitor", cleanup_monitor, NULL, 3600);
}
static inline unsigned int
hash_monitor_nick(const char *name)
{
return fnv_hash_upper((const unsigned char *) name, MONITOR_HASH_BITS);
}
struct monitor *
find_monitor(const char *name, int add)
{
struct monitor *monptr;
unsigned int hashv = hash_monitor_nick(name);
for(monptr = monitorTable[hashv]; monptr; monptr = monptr->hnext)
{
if(!irccmp(monptr->name, name))
return monptr;
}
if(add)
{
monptr = BlockHeapAlloc(monitor_heap);
strlcpy(monptr->name, name, sizeof(monptr->name));
monptr->hnext = monitorTable[hashv];
monitorTable[hashv] = monptr;
return monptr;
}
return NULL;
}
/* monitor_signon()
*
* inputs - client who has just connected
* outputs -
* side effects - notifies any clients monitoring this nickname that it has
* connected to the network
*/
void
monitor_signon(struct Client *client_p)
{
char buf[USERHOST_REPLYLEN];
struct monitor *monptr = find_monitor(client_p->name, 0);
/* noones watching this nick */
if(monptr == NULL)
return;
ircsnprintf(buf, sizeof(buf), "%s!%s@%s",
client_p->name, client_p->username, client_p->host);
sendto_monitor(monptr, form_str(RPL_MONONLINE), me.name, "*", buf);
}
/* monitor_signoff()
*
* inputs - client who is exiting
* outputs -
* side effects - notifies any clients monitoring this nickname that it has
* left the network
*/
void
monitor_signoff(struct Client *client_p)
{
struct monitor *monptr = find_monitor(client_p->name, 0);
/* noones watching this nick */
if(monptr == NULL)
return;
sendto_monitor(monptr, form_str(RPL_MONOFFLINE), me.name, "*",
client_p->name);
}
void
clear_monitor(struct Client *client_p)
{
struct monitor *monptr;
dlink_node *ptr, *next_ptr;
DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->localClient->monitor_list.head)
{
monptr = ptr->data;
/* we leave the actual entry around with no users, itll be
* cleaned up periodically by cleanup_monitor() --anfl
*/
dlinkFindDestroy(client_p, &monptr->users);
free_dlink_node(ptr);
}
client_p->localClient->monitor_list.head = client_p->localClient->monitor_list.tail = NULL;
client_p->localClient->monitor_list.length = 0;
}
static void
cleanup_monitor(void *unused)
{
struct monitor *last_ptr = NULL;
struct monitor *next_ptr, *ptr;
int i;
for(i = 0; i < MONITOR_HASH_SIZE; i++)
{
last_ptr = NULL;
for(ptr = monitorTable[i]; ptr; ptr = next_ptr)
{
next_ptr = ptr->hnext;
if(!dlink_list_length(&ptr->users))
{
if(last_ptr)
last_ptr->hnext = next_ptr;
else
monitorTable[i] = next_ptr;
BlockHeapFree(monitor_heap, ptr);
}
else
last_ptr = ptr;
}
}
}