--- a/include/applets.h +++ b/include/applets.h @@ -257,6 +257,7 @@ USE_MT(APPLET(mt, _BB_DIR_BIN, _BB_SUID_ USE_MV(APPLET(mv, _BB_DIR_BIN, _BB_SUID_NEVER)) USE_NAMEIF(APPLET(nameif, _BB_DIR_SBIN, _BB_SUID_NEVER)) USE_NC(APPLET(nc, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) +USE_NETMSG(APPLET(netmsg, _BB_DIR_BIN, _BB_SUID_ALWAYS)) USE_NETSTAT(APPLET(netstat, _BB_DIR_BIN, _BB_SUID_NEVER)) USE_NICE(APPLET(nice, _BB_DIR_BIN, _BB_SUID_NEVER)) USE_NMETER(APPLET(nmeter, _BB_DIR_USR_BIN, _BB_SUID_NEVER)) --- a/include/usage.h +++ b/include/usage.h @@ -2815,6 +2815,9 @@ #endif +#define netmsg_trivial_usage NOUSAGE_STR +#define netmsg_full_usage "" + #define netstat_trivial_usage \ "[-laentuwxr"USE_FEATURE_NETSTAT_WIDE("W")"]" #define netstat_full_usage "\n\n" \ --- a/networking/Config.in +++ b/networking/Config.in @@ -602,6 +602,12 @@ config NC A simple Unix utility which reads and writes data across network connections. +config NETMSG + bool "netmsg" + default n + help + simple program for sending udp broadcast messages + config NC_SERVER bool "Netcat server options (-l)" default n --- a/networking/Kbuild +++ b/networking/Kbuild @@ -24,6 +24,7 @@ lib-$(CONFIG_IP) += ip.o lib-$(CONFIG_IPCALC) += ipcalc.o lib-$(CONFIG_NAMEIF) += nameif.o lib-$(CONFIG_NC) += nc.o +lib-$(CONFIG_NETMSG) += netmsg.o lib-$(CONFIG_NETSTAT) += netstat.o lib-$(CONFIG_NSLOOKUP) += nslookup.o lib-$(CONFIG_PING) += ping.o --- /dev/null +++ b/networking/netmsg.c @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + * + * This is free software, licensed under the GNU General Public License v2. + */ +#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); +}