zebra/rtread_sysctl.c

   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 along
  18  * with this program; see the file COPYING; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <zebra.h>
  23
  24 #if !defined(GNU_LINUX) && !defined(SUNOS_5)
  25
  26 #include "memory.h"
  27 #include "zebra_memory.h"
  28 #include "log.h"
  29 #include "vrf.h"
  30
  31 #include "zebra/rt.h"
  32 #include "zebra/kernel_socket.h"
  33
  34 /* Kernel routing table read up by sysctl function. */
  35 void route_read(struct zebra_ns *zns)
  36 {
  37         caddr_t buf, end, ref;
  38         size_t bufsiz;
  39         struct rt_msghdr *rtm;
  40
  41 #define MIBSIZ 6
  42         int mib[MIBSIZ] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_DUMP, 0};
  43
  44         if (zns->ns_id != NS_DEFAULT)
  45                 return;
  46
  47         /* Get buffer size. */
  48         if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) {
  49                 zlog_warn("sysctl fail: %s", safe_strerror(errno));
  50                 return;
  51         }
  52
  53         /* Allocate buffer. */
  54         ref = buf = XMALLOC(MTYPE_TMP, bufsiz);
  55
  56         /* Read routing table information by calling sysctl(). */
  57         if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) {
  58                 zlog_warn("sysctl() fail by %s", safe_strerror(errno));
  59                 XFREE(MTYPE_TMP, ref);
  60                 return;
  61         }
  62
  63         for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen) {
  64                 rtm = (struct rt_msghdr *)buf;
  65                 /* We must set RTF_DONE here, so rtm_read() doesn't ignore the
  66                  * message. */
  67                 SET_FLAG(rtm->rtm_flags, RTF_DONE);
  68                 rtm_read(rtm);
  69         }
  70
  71         /* Free buffer. */
  72         XFREE(MTYPE_TMP, ref);
  73
  74         return;
  75 }
  76
  77 /* Only implemented for the netlink method. */
  78 void macfdb_read(struct zebra_ns *zns)
  79 {
  80 }
  81
  82 void macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp,
  83                             struct interface *br_if)
  84 {
  85 }
  86
  87 void neigh_read(struct zebra_ns *zns)
  88 {
  89 }
  90
  91 void neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if)
  92 {
  93 }
  94
  95 #endif /* !defined(GNU_LINUX) && !defined(SUNOS_5) */