rtread_sysctl.c
上传用户:xiaozhuqw
上传日期:2009-11-15
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文件大小:2k
- /*
- * 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"
- /* Kernel routing table read up by sysctl function. */
- int
- route_read ()
- {
- caddr_t buf, end, ref;
- size_t bufsiz;
- struct rt_msghdr *rtm;
- void rtm_read (struct rt_msghdr *);
-
- #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", strerror (errno));
- return -1;
- }
- /* 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", strerror (errno));
- return -1;
- }
- for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen)
- {
- rtm = (struct rt_msghdr *) buf;
- rtm_read (rtm);
- }
- /* Free buffer. */
- XFREE (MTYPE_TMP, ref);
- return 0;
- }