nest/rt-dev.c

   1 /*
   2  *      BIRD -- Direct Device Routes
   3  *
   4  *      (c) 1998 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #define LOCAL_DEBUG
  10
  11 #include <string.h>
  12
  13 #include "nest/bird.h"
  14 #include "nest/iface.h"
  15 #include "nest/protocol.h"
  16 #include "nest/route.h"
  17 #include "lib/resource.h"
  18
  19 static struct proto *dev_proto;
  20
  21 static void
  22 dev_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
  23 {
  24   if (c & IF_CHANGE_DOWN)
  25     {
  26       net *n;
  27
  28       debug("dev_if_notify: %s going down\n", old->name);
  29       n = net_find(&master_table, 0, old->prefix, old->pxlen);
  30       if (!n)
  31         {
  32           debug("dev_if_notify: device shutdown: prefix not found\n");
  33           return;
  34         }
  35       rte_update(n, dev_proto, NULL);
  36     }
  37   else if (c & IF_CHANGE_UP)
  38     {
  39       rta *a, A;
  40       net *n;
  41       rte *e;
  42
  43       debug("dev_if_notify: %s going up\n", new->name);
  44       bzero(&A, sizeof(A));
  45       A.proto = dev_proto;
  46       A.source = RTS_DEVICE;
  47       A.scope = (new->flags & IF_LOOPBACK) ? SCOPE_HOST : SCOPE_UNIVERSE;
  48       A.cast = RTC_UNICAST;
  49       A.dest = RTD_DEVICE;
  50       A.iface = new;
  51       A.attrs = NULL;
  52       a = rta_lookup(&A);
  53       n = net_get(&master_table, 0, new->prefix, new->pxlen);
  54       e = rte_get_temp(a);
  55       e->pflags = 0;
  56       rte_update(n, dev_proto, e);
  57     }
  58 }
  59
  60 static void
  61 dev_start(struct proto *p)
  62 {
  63 }
  64
  65 static void
  66 dev_init(struct protocol *p)
  67 {
  68 }
  69
  70 static void
  71 dev_preconfig(struct protocol *x)
  72 {
  73   struct proto *p = proto_new(&proto_device, sizeof(struct proto));
  74
  75   dev_proto = p;
  76   p->preference = DEF_PREF_DIRECT;
  77   p->start = dev_start;
  78   p->if_notify = dev_if_notify;
  79 }
  80
  81 static void
  82 dev_postconfig(struct protocol *p)
  83 {
  84 }
  85
  86 struct protocol proto_device = {
  87   { NULL, NULL },
  88   "Device",
  89   0,
  90   dev_init,
  91   dev_preconfig,
  92   dev_postconfig
  93 };