tools/dbgcli.c

   1 /*  dbgcli.c - printf over UDP debugging client
   2
   3 Copyright (C) 2010-2011  Hector Martin "marcan" <hector@marcansoft.com>
   4
   5 This code is licensed to you under the terms of the GNU GPL, version 2;
   6 see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
   7 */
   8
   9 #include <arpa/inet.h>
  10 #include <netinet/in.h>
  11 #include <stdio.h>
  12 #include <sys/types.h>
  13 #include <sys/socket.h>
  14 #include <unistd.h>
  15 #include <string.h>
  16
  17 #define BUFLEN 2048
  18 #define DEBUG_PORT 18194
  19
  20 char buf[BUFLEN];
  21
  22 int main(void)
  23 {
  24         struct sockaddr_in si_me, si_other;
  25         int fd;
  26         int len;
  27         socklen_t slen = sizeof(si_other);
  28         int one = 1;
  29
  30         fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
  31         if (fd == -1) {
  32                 perror("socket");
  33                 return 1;
  34         }
  35
  36         if (setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) == -1) {
  37                 perror("setsockopt(SO_BROADCAST)");
  38                 return 1;
  39         }
  40
  41         memset((char *) &si_me, 0, sizeof(si_me));
  42         si_me.sin_family = AF_INET;
  43         si_me.sin_port = htons(DEBUG_PORT);
  44         si_me.sin_addr.s_addr = htonl(INADDR_ANY);
  45
  46         if (bind(fd, (struct sockaddr *)&si_me, sizeof(si_me)) == -1) {
  47                 perror("bind");
  48                 return 1;
  49         }
  50
  51         while (1) {
  52                 len = recvfrom(fd, buf, BUFLEN, 0, (struct sockaddr *)&si_other, &slen);
  53                 if (len == -1) {
  54                         perror("recvfrom");
  55                         return 1;
  56                 }
  57                 buf[len] = 0;
  58                 fputs(buf, stdout);
  59                 fflush(stdout);
  60         }
  61 }
  62