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add small 'netmsg' utility to send udp broadcast messages

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2893 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2006-01-11 00:41:50 +00:00
parent ab28710172
commit 1eaf166d83
2 changed files with 108 additions and 0 deletions
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6
package/busybox/config/networking/Config.in
View File

@ -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"

102
package/busybox/patches/300-netmsg.patch Normal file
View File

@ -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);
+}