opt/pflana2.c

   1 #include <stdio.h>
   2 #include <stdint.h>
   3 #include <unistd.h>
   4 #include <signal.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <ctype.h>
   8 #include <assert.h>
   9 #include <sys/socket.h>
  10 #include <sys/types.h>
  11 #include <sys/ioctl.h>
  12 #include <net/if.h>
  13
  14 #define AF_LANA         27
  15
  16 /* TODO: add support for SIOCGIFINDEX into AF_LANA */
  17 static int device_ifindex(const char *ifname)
  18 {
  19         int ret, sock, index;
  20         struct ifreq ifr;
  21
  22         sock = socket(AF_INET, SOCK_DGRAM, 0);
  23         if (sock < 0)
  24                 return sock;
  25
  26         memset(&ifr, 0, sizeof(ifr));
  27         strncpy(ifr.ifr_name, ifname, strlen(ifname));
  28
  29         ret = ioctl(sock, SIOCGIFINDEX, &ifr);
  30         if (!ret)
  31                 index = ifr.ifr_ifindex;
  32         else
  33                 index = -1;
  34
  35         close(sock);
  36         return index;
  37 }
  38
  39 int main(void)
  40 {
  41         int sock, ret, idx;
  42         struct sockaddr sa;
  43         char buff[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  44                         0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
  45                         0xac, 0xdc, 0xee, 0xee, 0xee, 0xee };
  46
  47         sock = socket(AF_LANA, SOCK_RAW, 0);
  48         if (sock < 0) {
  49                 perror("socket");
  50                 return 0;
  51         }
  52
  53         /* XXX: #include <net/if.h> -> if_nametoindex(3) */
  54         idx = device_ifindex("eth10");
  55         if (idx < 0) {
  56                 ret = idx;
  57                 goto out;
  58         }
  59
  60         memset(&sa, 0, sizeof(sa));
  61         sa.sa_family = AF_LANA;
  62         sa.sa_data[0] = (uint8_t) idx;
  63
  64         ret = bind(sock, &sa, sizeof(sa));
  65         if (ret < 0) {
  66                 perror("bind");
  67                 goto out;
  68         }
  69
  70         ret = sendto(sock, buff, sizeof(buff), 0, &sa, sizeof(sa));
  71         if (ret < 0) {
  72                 perror("sendmsg");
  73                 goto out;
  74         }
  75
  76         ret = 0;
  77 out:
  78         close(sock);
  79         return ret;
  80 }
  81