Added a simple tool for listing local mikrotik routers by mac address

1 files changed, 71 insertions, 0 deletions

diff --git a/mndp.c b/mndp.c
new file mode 100644
index 0000000..8bc3292
--- /dev/null
+++ b/mndp.c
@@ -0,0 +1,71 @@
+/*
+    Mac-Telnet - Connect to RouterOS clients via MAC address
+    Copyright (C) 2010, Håkon Nessjøen <haakon.nessjoen@gmail.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+#include <stdlib.h>
+#include <stdio.h>
+#include <arpa/inet.h>
+#include <netinet/ether.h>
+#include <string.h>
+#include "config.h"
+
+int main(int argc, char **argv)  {
+	int sock,result;
+	struct sockaddr_in si_me;
+	unsigned char buff[1500];
+	unsigned short nameLen = 0;
+	unsigned char name[100];
+	unsigned char mac[ETH_ALEN];
+
+	sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+	memset((char *) &si_me, 0, sizeof(si_me));
+	si_me.sin_family = AF_INET;
+	si_me.sin_port = htons(5678);
+	si_me.sin_addr.s_addr = htonl(INADDR_ANY);
+
+	if (bind(sock, (struct sockaddr *)&si_me, sizeof(si_me))==-1) {
+		fprintf(stderr, "Error binding to %s:5678\n", inet_ntoa(si_me.sin_addr));
+		return 1;
+	}
+
+	/* Write informative message to STDERR to make it easier to use the output in simple scripts */
+	fprintf(stderr, "Searching for MikroTik routers... Abort with CTRL+C.\n");
+
+	while(1) {
+		result = recvfrom(sock, buff, 1500, 0, 0, 0);
+		if (result < 0) {
+			fprintf(stderr, "Error occured. aborting\n");
+			exit(1);
+		}
+
+		memcpy(&nameLen, buff+16,2);
+		nameLen = (nameLen >> 8) | ((nameLen&0xff)<<8);
+
+		/* Max name length = 99 */
+		nameLen = nameLen < 100 ? nameLen : 99;
+
+		memcpy(&name, buff+18, nameLen);
+		name[nameLen] = 0;
+
+		memcpy(&mac, buff+8, ETH_ALEN);
+
+		printf("%17s %s\n", ether_ntoa((struct ether_addr *)mac), name);
+	}
+
+	return 0;
+}