sysdep/unix/krt-set.c

   1 /*
   2  *      BIRD -- Unix Routing Table Syncing
   3  *
   4  *      (c) 1998--2000 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #include <sys/types.h>
  10 #include <sys/socket.h>
  11 #include <netinet/in.h>
  12 #include <sys/ioctl.h>
  13 #include <net/route.h>
  14
  15 #undef LOCAL_DEBUG
  16
  17 #include "nest/bird.h"
  18 #include "nest/iface.h"
  19 #include "nest/route.h"
  20 #include "nest/protocol.h"
  21 #include "lib/unix.h"
  22 #include "lib/krt.h"
  23 #include "lib/string.h"
  24
  25 int
  26 krt_capable(rte *e)
  27 {
  28   rta *a = e->attrs;
  29
  30 #ifdef CONFIG_AUTO_ROUTES
  31   if (a->source == RTS_DEVICE)
  32     return 0;
  33 #endif
  34   return
  35     a->cast == RTC_UNICAST &&
  36     (a->dest == RTD_ROUTER
  37      || a->dest == RTD_DEVICE
  38 #ifdef RTF_REJECT
  39      || a->dest == RTD_UNREACHABLE
  40 #endif
  41      );
  42 }
  43
  44 static void
  45 krt_ioctl(int ioc, rte *e, char *name)
  46 {
  47   net *net = e->net;
  48   struct rtentry re;
  49   rta *a = e->attrs;
  50
  51   bzero(&re, sizeof(re));
  52   fill_in_sockaddr((struct sockaddr_in *) &re.rt_dst, net->n.prefix, 0);
  53   fill_in_sockaddr((struct sockaddr_in *) &re.rt_genmask, ipa_mkmask(net->n.pxlen), 0);
  54   re.rt_flags = RTF_UP;
  55   if (net->n.pxlen == 32)
  56     re.rt_flags |= RTF_HOST;
  57   switch (a->dest)
  58     {
  59     case RTD_ROUTER:
  60       fill_in_sockaddr((struct sockaddr_in *) &re.rt_gateway, a->gw, 0);
  61       re.rt_flags |= RTF_GATEWAY;
  62       break;
  63     case RTD_DEVICE:
  64       re.rt_dev = a->iface->name;
  65       break;
  66 #ifdef RTF_REJECT
  67     case RTD_UNREACHABLE:
  68       re.rt_flags |= RTF_REJECT;
  69       break;
  70 #endif
  71     default:
  72       bug("krt set: unknown flags, but not filtered");
  73     }
  74
  75   if (ioctl(if_scan_sock, ioc, &re) < 0)
  76     log(L_ERR "%s(%I/%d): %m", name, net->n.prefix, net->n.pxlen);
  77 }
  78
  79 void
  80 krt_set_notify(struct krt_proto *p, net *net, rte *new, rte *old)
  81 {
  82   if (old)
  83     {
  84       DBG("krt_remove_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
  85       krt_ioctl(SIOCDELRT, old, "SIOCDELRT");
  86     }
  87   if (new)
  88     {
  89       DBG("krt_add_route(%I/%d)\n", net->n.prefix, net->n.pxlen);
  90       krt_ioctl(SIOCADDRT, new, "SIOCADDRT");
  91     }
  92 }
  93
  94 void
  95 krt_set_start(struct krt_proto *x, int first)
  96 {
  97   if (if_scan_sock < 0)
  98     bug("krt set: missing socket");
  99 }
 100
 101 void
 102 krt_set_construct(struct krt_config *c)
 103 {
 104 }
 105
 106 void
 107 krt_set_shutdown(struct krt_proto *x, int last)
 108 {
 109 }