zebra/rtread_sysctl.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Kernel routing table read by sysctl function.
   4  * Copyright (C) 1997, 98 Kunihiro Ishiguro
   5  */
   6
   7 #include <zebra.h>
   8
   9 #if !defined(GNU_LINUX)
  10
  11 #include "memory.h"
  12 #include "log.h"
  13 #include "vrf.h"
  14
  15 #include "zebra/rt.h"
  16 #include "zebra/kernel_socket.h"
  17 #include "zebra/zebra_pbr.h"
  18 #include "zebra/zebra_tc.h"
  19 #include "zebra/zebra_errors.h"
  20
  21 /* Kernel routing table read up by sysctl function. */
  22 void route_read(struct zebra_ns *zns)
  23 {
  24         caddr_t buf, end, ref;
  25         size_t bufsiz;
  26         struct rt_msghdr *rtm;
  27
  28 #define MIBSIZ 6
  29         int mib[MIBSIZ] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_DUMP, 0};
  30
  31         if (zns->ns_id != NS_DEFAULT)
  32                 return;
  33
  34         /* Get buffer size. */
  35         if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) {
  36                 flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl fail: %s",
  37                           safe_strerror(errno));
  38                 return;
  39         }
  40
  41         /* Allocate buffer. */
  42         ref = buf = XMALLOC(MTYPE_TMP, bufsiz);
  43
  44         /* Read routing table information by calling sysctl(). */
  45         if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) {
  46                 flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl() fail by %s",
  47                           safe_strerror(errno));
  48                 XFREE(MTYPE_TMP, ref);
  49                 return;
  50         }
  51
  52         for (end = buf + bufsiz; buf < end; buf += rtm->rtm_msglen) {
  53                 rtm = (struct rt_msghdr *)buf;
  54                 /* We must set RTF_DONE here, so rtm_read() doesn't ignore the
  55                  * message. */
  56                 SET_FLAG(rtm->rtm_flags, RTF_DONE);
  57                 rtm_read(rtm);
  58         }
  59
  60         /* Free buffer. */
  61         XFREE(MTYPE_TMP, ref);
  62
  63         return;
  64 }
  65
  66 /* Only implemented for the netlink method. */
  67 void macfdb_read(struct zebra_ns *zns)
  68 {
  69 }
  70
  71 void macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp,
  72                             struct interface *br_if, vlanid_t vid)
  73 {
  74 }
  75
  76 void macfdb_read_mcast_entry_for_vni(struct zebra_ns *zns,
  77                                      struct interface *ifp, vni_t vni)
  78 {
  79 }
  80
  81 void macfdb_read_specific_mac(struct zebra_ns *zns, struct interface *br_if,
  82                               const struct ethaddr *mac, vlanid_t vid)
  83 {
  84 }
  85
  86 void neigh_read(struct zebra_ns *zns)
  87 {
  88 }
  89
  90 void neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if)
  91 {
  92 }
  93
  94 void neigh_read_specific_ip(const struct ipaddr *ip, struct interface *vlan_if)
  95 {
  96 }
  97
  98 void kernel_read_pbr_rules(struct zebra_ns *zns)
  99 {
 100 }
 101
 102 void kernel_read_tc_qdisc(struct zebra_ns *zns)
 103 {
 104 }
 105
 106 void vlan_read(struct zebra_ns *zns)
 107 {
 108 }
 109
 110 #endif /* !defined(GNU_LINUX) */