Attachment 235606 Details for Bug 237973 – routing-monitor.c

routing-monitor.c

routing-monitor.c (text/plain), 1.07 KB, created by Goran Mekić on 2022-08-01 14:19:27 UTC

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Creator: Goran Mekić

Created: 2022-08-01 14:19:27 UTC

Size: 1.07 KB

patch

obsolete

>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
>#include <sys/socket.h>
>#include <net/route.h>
>
>
>int
>main() {
>  int s, n;
>  char rest[1024];
>  struct rt_msghdr hd;
>  struct msghdr msg;
>  struct iovec iov[2];
>
>  memset(&hd, 0, sizeof(hd));
>  memset(&msg, 0, sizeof(msg));
>  memset(iov, 0, sizeof(iov));
>  iov[0].iov_base = &hd;
>  iov[0].iov_len = sizeof(hd);
>  iov[1].iov_base = &rest;
>  iov[1].iov_len = sizeof(rest);
>  msg.msg_iov = iov;
>  msg.msg_iovlen = 2;
>
>  s = socket(PF_ROUTE, SOCK_RAW, 0);
>  for (;;) {
>    n = recvmsg(s, &msg, 0);
>    if (n < 0) {
>      perror("recvmsg failed");
>      break;
>    }
>    printf("Received message of size: %d.\n", n);
>    printf("Header size: %lu.\n", sizeof(hd));
>    switch(hd.rtm_type) {
>      case RTM_ADD:
>        printf("Route added on interface with index %d\n", hd.rtm_index);
>        break;
>      case RTM_DELETE:
>        printf("Route deleted on interface with index %d\n", hd.rtm_index);
>        break;
>    }
>    printf("Flags: %d, addresses: %d\n", hd.rtm_flags, hd.rtm_addrs);
>    printf("\n");
>  }
>  return 0;
>}

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Attachments on bug 237973: 235606