Annotation of embedaddon/quagga/zebra/rtread_sysctl.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Kernel routing table read by sysctl function.
! 3: * Copyright (C) 1997, 98 Kunihiro Ishiguro
! 4: *
! 5: * This file is part of GNU Zebra.
! 6: *
! 7: * GNU Zebra is free software; you can redistribute it and/or modify it
! 8: * under the terms of the GNU General Public License as published by the
! 9: * Free Software Foundation; either version 2, or (at your option) any
! 10: * later version.
! 11: *
! 12: * GNU Zebra is distributed in the hope that it will be useful, but
! 13: * WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! 15: * General Public License for more details.
! 16: *
! 17: * You should have received a copy of the GNU General Public License
! 18: * along with GNU Zebra; see the file COPYING. If not, write to the Free
! 19: * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
! 20: * 02111-1307, USA.
! 21: */
! 22:
! 23: #include <zebra.h>
! 24:
! 25: #include "memory.h"
! 26: #include "log.h"
! 27:
! 28: #include "zebra/zserv.h"
! 29: #include "zebra/rt.h"
! 30: #include "zebra/kernel_socket.h"
! 31:
! 32: /* Kernel routing table read up by sysctl function. */
! 33: void
! 34: route_read (void)
! 35: {
! 36: caddr_t buf, end, ref;
! 37: size_t bufsiz;
! 38: struct rt_msghdr *rtm;
! 39:
! 40: #define MIBSIZ 6
! 41: int mib[MIBSIZ] =
! 42: {
! 43: CTL_NET,
! 44: PF_ROUTE,
! 45: 0,
! 46: 0,
! 47: NET_RT_DUMP,
! 48: 0
! 49: };
! 50:
! 51: /* Get buffer size. */
! 52: if (sysctl (mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0)
! 53: {
! 54: zlog_warn ("sysctl fail: %s", safe_strerror (errno));
! 55: return;
! 56: }
! 57:
! 58: /* Allocate buffer. */
! 59: ref = buf = XMALLOC (MTYPE_TMP, bufsiz);
! 60:
! 61: /* Read routing table information by calling sysctl(). */
! 62: if (sysctl (mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0)
! 63: {
! 64: zlog_warn ("sysctl() fail by %s", safe_strerror (errno));
! 65: return;
! 66: }
! 67:
! 68: for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen)
! 69: {
! 70: rtm = (struct rt_msghdr *) buf;
! 71: /* We must set RTF_DONE here, so rtm_read() doesn't ignore the message. */
! 72: SET_FLAG (rtm->rtm_flags, RTF_DONE);
! 73: rtm_read (rtm);
! 74: }
! 75:
! 76: /* Free buffer. */
! 77: XFREE (MTYPE_TMP, ref);
! 78:
! 79: return;
! 80: }
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