add small 'netmsg' utility to send udp broadcast messages

SVN-Revision: 2893
19 years ago · 2e2e260800
parent 3eeed1209d
commit 2e2e260800
2 changed files with 108 additions and 0 deletions
--- a/openwrt/package/busybox/config/networking/Config.in
+++ b/openwrt/package/busybox/config/networking/Config.in
@ -414,6 +414,12 @@ config BUSYBOX_CONFIG_NC
 	help
 	  A simple Unix utility which reads and writes data across network
 	  connections.
+	  
+config BUSYBOX_CONFIG_NETMSG
+	bool "netmsg"
+	default y
+	help
+	  simple program for sending udp broadcast messages

 config BUSYBOX_CONFIG_NETSTAT
 	bool "netstat"
--- a/openwrt/package/busybox/patches/300-netmsg.patch
+++ b/openwrt/package/busybox/patches/300-netmsg.patch
@ -0,0 +1,102 @@
+diff -urN busybox.old/include/applets.h busybox.dev/include/applets.h
+--- busybox.old/include/applets.h	2006-01-11 01:32:47.302791000 +0100
+++ busybox.dev/include/applets.h	2006-01-11 01:33:18.744756250 +0100
+@@ -475,6 +475,9 @@
+ #ifdef CONFIG_NC
+ 	APPLET(nc, nc_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+ #endif
+#ifdef CONFIG_NETMSG
+	APPLET_NOUSAGE("netmsg", netmsg_main, _BB_DIR_BIN, _BB_SUID_ALWAYS)
+#endif
+ #ifdef CONFIG_NETSTAT
+ 	APPLET(netstat, netstat_main, _BB_DIR_BIN, _BB_SUID_NEVER)
+ #endif
+diff -urN busybox.old/networking/Config.in busybox.dev/networking/Config.in
+--- busybox.old/networking/Config.in	2005-11-01 00:55:15.000000000 +0100
+++ busybox.dev/networking/Config.in	2006-01-11 01:33:18.744756250 +0100
+@@ -435,6 +435,12 @@
+ 	help
+ 	  A simple Unix utility which reads and writes data across network
+ 	  connections.
+	  
+config CONFIG_NETMSG
+	bool "netmsg"
+	default n
+	help
+	  simple program for sending udp broadcast messages
+ 
+ config CONFIG_NC_GAPING_SECURITY_HOLE
+ 	bool "gaping security hole"
+diff -urN busybox.old/networking/Makefile.in busybox.dev/networking/Makefile.in
+--- busybox.old/networking/Makefile.in	2005-11-01 00:55:15.000000000 +0100
+++ busybox.dev/networking/Makefile.in	2006-01-11 01:34:02.939518250 +0100
+@@ -28,6 +28,7 @@
+ NETWORKING-$(CONFIG_IPTUNNEL)     += iptunnel.o
+ NETWORKING-$(CONFIG_NAMEIF)       += nameif.o
+ NETWORKING-$(CONFIG_NC)           += nc.o
+NETWORKING-$(CONFIG_NETMSG)       += netmsg.o
+ NETWORKING-$(CONFIG_NETSTAT)      += netstat.o
+ NETWORKING-$(CONFIG_NSLOOKUP)     += nslookup.o
+ NETWORKING-$(CONFIG_PING)         += ping.o
+diff -urN busybox.old/networking/netmsg.c busybox.dev/networking/netmsg.c
+--- busybox.old/networking/netmsg.c	1970-01-01 01:00:00.000000000 +0100
+++ busybox.dev/networking/netmsg.c	2006-01-11 01:33:18.748756500 +0100
+@@ -0,0 +1,58 @@
+#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, i;
+	struct sockaddr_in addr;
+	int optval = 1;
+	unsigned char buf[1001];
+
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s \"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 = htonl(0xffffffff);
+	addr.sin_port = htons(0x1337);
+
+	memset(buf, 0, 1001);
+	buf[0] = 0xde;
+	buf[1] = 0xad;
+
+	strncpy(buf + 2, argv[1], 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);
+}