nest/rt-dev.c

   1 /*
   2  *      BIRD -- Direct Device Routes
   3  *
   4  *      (c) 1998--1999 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 "nest/rt-dev.h"
  18 #include "conf/conf.h"
  19 #include "lib/resource.h"
  20
  21 static void
  22 dev_ifa_notify(struct proto *p, unsigned c, struct ifa *ad)
  23 {
  24   struct rt_dev_config *P = (void *) p->cf;
  25
  26   if (!EMPTY_LIST(P->iface_list) &&
  27       !iface_patt_match(&P->iface_list, ad->iface))
  28     /* Empty list is automagically treated as "*" */
  29     return;
  30   if (c & IF_CHANGE_DOWN)
  31     {
  32       net *n;
  33
  34       DBG("dev_if_notify: %s:%I going down\n", ad->iface->name, ad->ip);
  35       n = net_find(p->table, ad->prefix, ad->pxlen);
  36       if (!n)
  37         {
  38           debug("dev_if_notify: device shutdown: prefix not found\n");
  39           return;
  40         }
  41       rte_update(p->table, n, p, NULL);
  42     }
  43   else if (c & IF_CHANGE_UP)
  44     {
  45       rta *a, A;
  46       net *n;
  47       rte *e;
  48
  49       debug("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip);
  50       bzero(&A, sizeof(A));
  51       A.proto = p;
  52       A.source = RTS_DEVICE;
  53       A.scope = ad->scope;
  54       A.cast = RTC_UNICAST;
  55       A.dest = RTD_DEVICE;
  56       A.iface = ad->iface;
  57       A.eattrs = NULL;
  58       a = rta_lookup(&A);
  59       if (ad->flags & IF_UNNUMBERED)
  60         n = net_get(p->table, ad->opposite, ad->pxlen);
  61       else
  62         n = net_get(p->table, ad->prefix, ad->pxlen);
  63       e = rte_get_temp(a);
  64       e->net = n;
  65       e->pflags = 0;
  66       rte_update(p->table, n, p, e);
  67     }
  68 }
  69
  70 static struct proto *
  71 dev_init(struct proto_config *c)
  72 {
  73   struct proto *p = proto_new(c, sizeof(struct proto));
  74
  75   p->ifa_notify = dev_ifa_notify;
  76   return p;
  77 }
  78
  79 struct protocol proto_device = {
  80   name:         "Direct",
  81   priority:     90,
  82   init:         dev_init,
  83 };