| --- /dev/null |
| +++ b/networking/netmsg.c |
| @@ -0,0 +1,76 @@ |
| +/* |
| + * Copyright (C) 2006 Felix Fietkau <nbd@nbd.name> |
| + * |
| + * This is free software, licensed under the GNU General Public License v2. |
| + */ |
| + |
| +//config:config NETMSG |
| +//config: bool "netmsg" |
| +//config: default n |
| +//config: help |
| +//config: simple program for sending udp broadcast messages |
| + |
| +//applet:IF_NETMSG(APPLET(netmsg, BB_DIR_BIN, BB_SUID_REQUIRE)) |
| + |
| +//kbuild:lib-$(CONFIG_NETMSG) += netmsg.o |
| + |
| +//usage:#define netmsg_trivial_usage NOUSAGE_STR |
| +//usage:#define netmsg_full_usage "" |
| + |
| +#include <sys/types.h> |
| +#include <sys/socket.h> |
| +#include <netinet/in.h> |
| +#include <netdb.h> |
| +#include <stdio.h> |
| +#include <stdlib.h> |
| +#include <string.h> |
| +#include "busybox.h" |
| + |
| +#ifndef CONFIG_NETMSG |
| +int main(int argc, char **argv) |
| +#else |
| +int netmsg_main(int argc, char **argv) |
| +#endif |
| +{ |
| + int s; |
| + struct sockaddr_in addr; |
| + int optval = 1; |
| + unsigned char buf[1001]; |
| + |
| + if (argc != 3) { |
| + fprintf(stderr, "usage: %s <ip> \"<message>\"\n", argv[0]); |
| + exit(1); |
| + } |
| + |
| + if ((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { |
| + perror("Opening socket"); |
| + exit(1); |
| + } |
| + |
| + memset(&addr, 0, sizeof(addr)); |
| + addr.sin_family = AF_INET; |
| + addr.sin_addr.s_addr = inet_addr(argv[1]); |
| + addr.sin_port = htons(0x1337); |
| + |
| + memset(buf, 0, 1001); |
| + buf[0] = 0xde; |
| + buf[1] = 0xad; |
| + |
| + strncpy(buf + 2, argv[2], 998); |
| + |
| + if (setsockopt (s, SOL_SOCKET, SO_BROADCAST, (caddr_t) &optval, sizeof (optval)) < 0) { |
| + perror("setsockopt()"); |
| + goto fail; |
| + } |
| + |
| + if (sendto(s, buf, 1001, 0, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| + perror("sendto()"); |
| + goto fail; |
| + } |
| + |
| + return 0; |
| + |
| +fail: |
| + close(s); |
| + exit(1); |
| +} |