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/*
* Kernel routing table read by sysctl function.
* Copyright (C) 1997, 98 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra 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 2, or (at your option) any
* later version.
*
* GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <zebra.h>
#include "memory.h"
#include "log.h"
#include "zebra/zserv.h"
#include "zebra/rt.h"
#include "zebra/kernel_socket.h"
/* Kernel routing table read up by sysctl function. */
void
route_read (void)
{
caddr_t buf, end, ref;
size_t bufsiz;
struct rt_msghdr *rtm;
#define MIBSIZ 6
int mib[MIBSIZ] =
{
CTL_NET,
PF_ROUTE,
0,
0,
NET_RT_DUMP,
0
};
/* Get buffer size. */
if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0)
{
zlog_warn ("sysctl fail: %s", safe_strerror (errno));
return;
}
/* Allocate buffer. */
ref = buf = XMALLOC (MTYPE_TMP, bufsiz);
/* Read routing table information by calling sysctl(). */
if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0)
{
zlog_warn ("sysctl() fail by %s", safe_strerror (errno));
return;
}
for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen)
{
rtm = (struct rt_msghdr *) buf;
/* We must set RTF_DONE here, so rtm_read() doesn't ignore the message. */
SET_FLAG (rtm->rtm_flags, RTF_DONE);
rtm_read (rtm);
}
/* Free buffer. */
XFREE (MTYPE_TMP, ref);
return;
}
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