LXR uboot/tools/ncb.c

   1#include <stdio.h>
   2#include <stdlib.h>
   3#include <unistd.h>
   4#include <sys/socket.h>
   5#include <netinet/in.h>
   6
   7int main (int argc, char *argv[])
   8{
   9        int s, len, o, port = 6666;
  10        char buf[512];
  11        struct sockaddr_in addr;
  12        socklen_t addr_len = sizeof addr;
  13
  14        if (argc > 1)
  15                port = atoi (argv[1]);
  16
  17        s = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP);
  18
  19        o = 1;
  20        len = 4;
  21        setsockopt (3, SOL_SOCKET, SO_REUSEADDR, &o, len);
  22
  23        addr.sin_family = AF_INET;
  24        addr.sin_port = htons (port);
  25        addr.sin_addr.s_addr = INADDR_ANY;      /* receive broadcasts */
  26
  27        bind (s, (struct sockaddr *) &addr, sizeof addr);
  28
  29        for (;;) {
  30                len = recvfrom (s, buf, sizeof buf, 0, (struct sockaddr *) &addr, &addr_len);
  31                if (len < 0)
  32                        break;
  33                if (write (1, buf, len) != len)
  34                        fprintf(stderr, "WARNING: serial characters dropped\n");
  35        }
  36
  37        return 0;
  38}
  39