--- a/include/applets.src.h +++ b/include/applets.src.h @@ -255,6 +255,7 @@ IF_MT(APPLET(mt, BB_DIR_BIN, BB_SUID_DRO IF_MV(APPLET(mv, BB_DIR_BIN, BB_SUID_DROP)) IF_NAMEIF(APPLET(nameif, BB_DIR_SBIN, BB_SUID_DROP)) IF_NC(APPLET(nc, BB_DIR_USR_BIN, BB_SUID_DROP)) +IF_NETMSG(APPLET(netmsg, BB_DIR_BIN, BB_SUID_REQUIRE)) IF_NETSTAT(APPLET(netstat, BB_DIR_BIN, BB_SUID_DROP)) IF_NICE(APPLET(nice, BB_DIR_BIN, BB_SUID_DROP)) IF_NOHUP(APPLET(nohup, BB_DIR_USR_BIN, BB_SUID_DROP)) --- a/networking/Config.src +++ b/networking/Config.src @@ -620,6 +620,12 @@ config FEATURE_IPCALC_LONG_OPTIONS help Support long options for the ipcalc applet. +config NETMSG + bool "netmsg" + default n + help + simple program for sending udp broadcast messages + config NETSTAT bool "netstat" default y --- a/networking/Kbuild.src +++ b/networking/Kbuild.src @@ -27,6 +27,7 @@ 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_NTPD) += ntpd.o --- /dev/null +++ b/networking/netmsg.c @@ -0,0 +1,65 @@ +/* + * 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" + +//usage:#define netmsg_trivial_usage NOUSAGE_STR +//usage:#define netmsg_full_usage "" + +#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); +}