package/utils/busybox/patches/210-add_netmsg_util.patch

   1 --- /dev/null
   2 +++ b/networking/netmsg.c
   3 @@ -0,0 +1,76 @@
   4 +/*
   5 + * Copyright (C) 2006 Felix Fietkau <nbd@nbd.name>
   6 + *
   7 + * This is free software, licensed under the GNU General Public License v2.
   8 + */
   9 +
  10 +//config:config NETMSG
  11 +//config:      bool "netmsg"
  12 +//config:      default n
  13 +//config:      help
  14 +//config:        simple program for sending udp broadcast messages
  15 +
  16 +//applet:IF_NETMSG(APPLET(netmsg, BB_DIR_BIN, BB_SUID_REQUIRE))
  17 +
  18 +//kbuild:lib-$(CONFIG_NETMSG) += netmsg.o
  19 +
  20 +//usage:#define netmsg_trivial_usage NOUSAGE_STR
  21 +//usage:#define netmsg_full_usage ""
  22 +
  23 +#include <sys/types.h>
  24 +#include <sys/socket.h>
  25 +#include <netinet/in.h>
  26 +#include <netdb.h>
  27 +#include <stdio.h>
  28 +#include <stdlib.h>
  29 +#include <string.h>
  30 +#include "busybox.h"
  31 +
  32 +#ifndef CONFIG_NETMSG
  33 +int main(int argc, char **argv)
  34 +#else
  35 +int netmsg_main(int argc, char **argv)
  36 +#endif
  37 +{
  38 +       int s;
  39 +       struct sockaddr_in addr;
  40 +       int optval = 1;
  41 +       unsigned char buf[1001];
  42 +
  43 +       if (argc != 3) {
  44 +               fprintf(stderr, "usage: %s <ip> \"<message>\"\n", argv[0]);
  45 +               exit(1);
  46 +       }
  47 +
  48 +       if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
  49 +               perror("Opening socket");
  50 +               exit(1);
  51 +       }
  52 +
  53 +       memset(&addr, 0, sizeof(addr));
  54 +       addr.sin_family = AF_INET;
  55 +       addr.sin_addr.s_addr = inet_addr(argv[1]);
  56 +       addr.sin_port = htons(0x1337);
  57 +
  58 +       memset(buf, 0, 1001);
  59 +       buf[0] = 0xde;
  60 +       buf[1] = 0xad;
  61 +
  62 +       strncpy(buf + 2, argv[2], 998);
  63 +
  64 +       if (setsockopt (s, SOL_SOCKET, SO_BROADCAST, (caddr_t) &optval, sizeof (optval)) < 0) {
  65 +               perror("setsockopt()");
  66 +               goto fail;
  67 +       }
  68 +
  69 +       if (sendto(s, buf, 1001, 0, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  70 +               perror("sendto()");
  71 +               goto fail;
  72 +       }
  73 +
  74 +       return 0;
  75 +
  76 +fail:
  77 +       close(s);
  78 +       exit(1);
  79 +}