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)
  25
  26 #include "memory.h"
  27 #include "log.h"
  28 #include "vrf.h"
  29
  30 #include "zebra/rt.h"
  31 #include "zebra/kernel_socket.h"
  32 #include "zebra/zebra_pbr.h"
  33 #include "zebra/zebra_errors.h"
  34
  35 /* Kernel routing table read up by sysctl function. */
  36 void route_read(struct zebra_ns *zns)
  37 {
  38         caddr_t buf, end, ref;
  39         size_t bufsiz;
  40         struct rt_msghdr *rtm;
  41
  42 #define MIBSIZ 6
  43         int mib[MIBSIZ] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_DUMP, 0};
  44
  45         if (zns->ns_id != NS_DEFAULT)
  46                 return;
  47
  48         /* Get buffer size. */
  49         if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) {
  50                 flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl fail: %s",
  51                           safe_strerror(errno));
  52                 return;
  53         }
  54
  55         /* Allocate buffer. */
  56         ref = buf = XMALLOC(MTYPE_TMP, bufsiz);
  57
  58         /* Read routing table information by calling sysctl(). */
  59         if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) {
  60                 flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl() fail by %s",
  61                           safe_strerror(errno));
  62                 XFREE(MTYPE_TMP, ref);
  63                 return;
  64         }
  65
  66         for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen) {
  67                 rtm = (struct rt_msghdr *)buf;
  68                 /* We must set RTF_DONE here, so rtm_read() doesn't ignore the
  69                  * message. */
  70                 SET_FLAG(rtm->rtm_flags, RTF_DONE);
  71                 rtm_read(rtm);
  72         }
  73
  74         /* Free buffer. */
  75         XFREE(MTYPE_TMP, ref);
  76
  77         return;
  78 }
  79
  80 /* Only implemented for the netlink method. */
  81 void macfdb_read(struct zebra_ns *zns)
  82 {
  83 }
  84
  85 void macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp,
  86                             struct interface *br_if)
  87 {
  88 }
  89
  90 void macfdb_read_specific_mac(struct zebra_ns *zns, struct interface *br_if,
  91                               const struct ethaddr *mac, vlanid_t vid)
  92 {
  93 }
  94
  95 void neigh_read(struct zebra_ns *zns)
  96 {
  97 }
  98
  99 void neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if)
 100 {
 101 }
 102
 103 void neigh_read_specific_ip(const struct ipaddr *ip, struct interface *vlan_if)
 104 {
 105 }
 106
 107 void kernel_read_pbr_rules(struct zebra_ns *zns)
 108 {
 109 }
 110
 111 #endif /* !defined(GNU_LINUX) */