opt/pflana.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <signal.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <ctype.h>
   7 #include <sys/socket.h>
   8
   9 #define AF_LANA         27
  10
  11 static sig_atomic_t sigint = 0;
  12
  13 static void intr(int sig)
  14 {
  15         sigint = 1;
  16 }
  17
  18 static inline void register_signal(int signal, void (*handler)(int))
  19 {
  20         sigset_t block_mask;
  21         struct sigaction saction;
  22
  23         sigfillset(&block_mask);
  24         saction.sa_handler = handler;
  25         saction.sa_mask = block_mask;
  26         saction.sa_flags = SA_RESTART;
  27
  28         sigaction(signal, &saction, NULL);
  29 }
  30
  31 int main(void)
  32 {
  33         int sock;
  34         char buff[256];
  35         struct iovec iov[1];
  36         struct msghdr msg;
  37
  38         register_signal(SIGINT, intr);
  39         sock = socket(AF_LANA, SOCK_DGRAM, 0);
  40         if (sock < 0) {
  41                 perror("socket");
  42                 return 0;
  43         }
  44
  45         memset(&msg, 0, sizeof(msg));
  46         memset(iov, 0, sizeof(iov));
  47         iov[0].iov_base = buff;
  48         iov[0].iov_len = sizeof(buff);
  49         msg.msg_iov = iov;
  50         msg.msg_iovlen = 1;
  51
  52         printf("Worked! Abort with ^C\n");
  53         while (!sigint) {
  54 //              int ret = recvmsg(sock, &msg, 0);
  55                 int ret = recv(sock, buff, sizeof(buff), 0);
  56                 if (ret < 0) {
  57                         perror("recvmsg");
  58                         sleep(1);
  59                         continue;
  60                 } else {
  61                         char *ptr = (char *) iov[0].iov_base;
  62                         size_t len = iov[0].iov_len;
  63                         printf("msg received:\n");
  64                         for (; len-- > 0; ptr++)
  65                                 printf("0x%x ", *ptr);
  66                         printf("\n\n");
  67 //                      memset(iov[0].iov_base, 0, iov[0].iov_len);
  68                         memset(buff, 0, sizeof(buff));
  69                 }
  70         }
  71
  72         close(sock);
  73         return 0;
  74 }
  75