--- arpspoof.c.orig	2007-06-22 21:24:26.169638763 -0400
+++ arpspoof.c	2007-06-25 23:08:51.786962797 -0400
@@ -31,12 +31,13 @@
 static struct ether_addr spoof_mac, target_mac;
 static in_addr_t spoof_ip, target_ip;
 static char *intf;
+static int anon;
 
 static void
 usage(void)
 {
 	fprintf(stderr, "Version: " VERSION "\n"
-		"Usage: arpspoof [-i interface] [-t target] host\n");
+		"Usage: arpspoof [-a] [-i interface] [-t target] host\n");
 	exit(1);
 }
 
@@ -51,14 +52,20 @@
 	    (sha = (u_char *)libnet_get_hwaddr(llif, dev, ebuf)) == NULL) {
 		return (-1);
 	}
+
 	if (spa == 0) {
 		if ((spa = libnet_get_ipaddr(llif, dev, ebuf)) == 0)
 			return (-1);
 		spa = htonl(spa); /* XXX */
 	}
+	
 	if (tha == NULL)
 		tha = "\xff\xff\xff\xff\xff\xff";
 	
+	if (anon) {
+	        sha = tha = "\x01\x00\x5e\x00\x00\x01";
+        }
+
 	libnet_build_ethernet(tha, sha, ETHERTYPE_ARP, NULL, 0, pkt);
 	
 	libnet_build_arp(ARPHRD_ETHER, ETHERTYPE_IP, ETHER_ADDR_LEN, 4,
@@ -154,11 +161,15 @@
 	char ebuf[PCAP_ERRBUF_SIZE];
 	int c;
 	
+	anon = 0;
 	intf = NULL;
 	spoof_ip = target_ip = 0;
 	
-	while ((c = getopt(argc, argv, "i:t:h?V")) != -1) {
+	while ((c = getopt(argc, argv, "ahi:t?V")) != -1) {
 		switch (c) {
+		case 'a':
+		        anon = 1;
+			break;
 		case 'i':
 			intf = optarg;
 			break;