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 #include "zebra/zebra_pbr.h"
  34 #include "zebra/zebra_errors.h"
  35
  36 /* Kernel routing table read up by sysctl function. */
  37 void route_read(struct zebra_ns *zns)
  38 {
  39         caddr_t buf, end, ref;
  40         size_t bufsiz;
  41         struct rt_msghdr *rtm;
  42
  43 #define MIBSIZ 6
  44         int mib[MIBSIZ] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_DUMP, 0};
  45
  46         if (zns->ns_id != NS_DEFAULT)
  47                 return;
  48
  49         /* Get buffer size. */
  50         if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) {
  51                 flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl fail: %s",
  52                           safe_strerror(errno));
  53                 return;
  54         }
  55
  56         /* Allocate buffer. */
  57         ref = buf = XMALLOC(MTYPE_TMP, bufsiz);
  58
  59         /* Read routing table information by calling sysctl(). */
  60         if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) {
  61                 flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl() fail by %s",
  62                           safe_strerror(errno));
  63                 XFREE(MTYPE_TMP, ref);
  64                 return;
  65         }
  66
  67         for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen) {
  68                 rtm = (struct rt_msghdr *)buf;
  69                 /* We must set RTF_DONE here, so rtm_read() doesn't ignore the
  70                  * message. */
  71                 SET_FLAG(rtm->rtm_flags, RTF_DONE);
  72                 rtm_read(rtm);
  73         }
  74
  75         /* Free buffer. */
  76         XFREE(MTYPE_TMP, ref);
  77
  78         return;
  79 }
  80
  81 /* Only implemented for the netlink method. */
  82 void macfdb_read(struct zebra_ns *zns)
  83 {
  84 }
  85
  86 void macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp,
  87                             struct interface *br_if)
  88 {
  89 }
  90
  91 void neigh_read(struct zebra_ns *zns)
  92 {
  93 }
  94
  95 void neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if)
  96 {
  97 }
  98
  99 void kernel_read_pbr_rules(struct zebra_ns *zns)
 100 {
 101 }
 102
 103 #endif /* !defined(GNU_LINUX) && !defined(SUNOS_5) */