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/************************************************************************
* Unreal Internet Relay Chat Daemon, src/fdlist.c
* Copyright (C) Mika Nystrom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id$ */
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "h.h"
#include "config.h"
#include "fdlist.h"
#include "proto.h"
#include <string.h>
extern fdlist default_fdlist;
extern fdlist busycli_fdlist;
extern fdlist serv_fdlist;
extern fdlist oper_fdlist;
#define FDLIST_DEBUG
void addto_fdlist(int fd, fdlist * listp)
{
int index;
#ifdef FDLIST_DEBUG
int i;
#endif
/* I prefer this little 5-cpu-cycles-check over memory corruption. -- Syzop */
if ((fd < 0) || (fd >= MAXCONNECTIONS))
{
sendto_realops("[BUG] trying to add fd #%d to %p (%p/%p/%p/%p), range is 0..%d",
fd, listp, &default_fdlist, &busycli_fdlist, &serv_fdlist, &oper_fdlist,
MAXCONNECTIONS);
ircd_log(LOG_ERROR, "[BUG] trying to add fd #%d to %p (%p/%p/%p/%p), range is 0..%d",
fd, listp, &default_fdlist, &busycli_fdlist, &serv_fdlist, &oper_fdlist,
MAXCONNECTIONS);
return;
}
#ifdef FDLIST_DEBUG
for (i = listp->last_entry; i; i--)
{
if (listp->entry[i] == fd)
{
char buf[2048];
ircsprintf(buf, "[BUG] addto_fdlist() called for duplicate entry! fd=%d, fdlist=%p, client=%s (%p/%p/%p/%p)",
fd, listp, local[fd] ? local[fd]->name : "<null>", &default_fdlist, &busycli_fdlist, &serv_fdlist, &oper_fdlist);
sendto_realops("%s", buf);
ircd_log(LOG_ERROR, "%s", buf);
return;
}
}
#endif
if ((index = ++listp->last_entry) >= MAXCONNECTIONS)
{
/*
* list too big.. must exit
*/
--listp->last_entry;
ircd_log(LOG_ERROR, "fdlist.c list too big, must exit...");
abort();
}
else
listp->entry[index] = fd;
return;
}
void delfrom_fdlist(int fd, fdlist * listp)
{
int i;
#ifdef FDLIST_DEBUG
int cnt = 0;
#endif
/* I prefer this little 5-cpu-cycles-check over memory corruption. -- Syzop */
if ((fd < 0) || (fd >= MAXCONNECTIONS))
{
sendto_realops("[BUG] trying to remove fd #%d to %p (%p/%p/%p/%p), range is 0..%d",
fd, listp, &default_fdlist, &busycli_fdlist, &serv_fdlist, &oper_fdlist,
MAXCONNECTIONS);
ircd_log(LOG_ERROR, "[BUG] trying to remove fd #%d to %p (%p/%p/%p/%p), range is 0..%d",
fd, listp, &default_fdlist, &busycli_fdlist, &serv_fdlist, &oper_fdlist,
MAXCONNECTIONS);
return;
}
#ifdef FDLIST_DEBUG
for (i = listp->last_entry; i; i--)
{
if (listp->entry[i] == fd)
cnt++;
}
if (cnt > 1)
{
char buf[2048];
ircsprintf(buf, "[BUG] delfrom_fdlist() called, duplicate entries detected! fd=%d, fdlist=%p, client=%s (%p/%p/%p/%p)",
fd, listp, local[fd] ? local[fd]->name : "<null>", &default_fdlist, &busycli_fdlist, &serv_fdlist, &oper_fdlist);
sendto_realops("%s", buf);
ircd_log(LOG_ERROR, "%s", buf);
return;
}
#endif
for (i = listp->last_entry; i; i--)
{
if (listp->entry[i] == fd)
break;
}
if (!i)
return; /*
* could not find it!
*/
/*
* swap with last_entry
*/
if (i == listp->last_entry)
{
listp->entry[i] = 0;
listp->last_entry--;
return;
}
else
{
listp->entry[i] = listp->entry[listp->last_entry];
listp->entry[listp->last_entry] = 0;
listp->last_entry--;
return;
}
}
void init_fdlist(fdlist * listp)
{
listp->last_entry = 0;
memset((char *)listp->entry, '\0', sizeof(listp->entry));
return;
}
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