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