diff -U 3 -r /src/config.h src/config.h
--- src/config.h	2002-10-24 15:16:34.000000000 +0200
+++ src/config.h	2004-04-07 00:39:51.000000000 +0200
@@ -37,7 +37,7 @@
 #define WEPKEYSTORE     	(WEPKEYSIZE * WEPKEYS)
 
 #define DEBUG 			0
-#define VERSION			"0.1.3"
+#define VERSION			"0.1.3 (Gentoo patched)"
 
 
 #endif
diff -U 3 -r /src/log.c src/log.c
--- src/log.c	2002-10-24 15:15:55.000000000 +0200
+++ src/log.c	2004-04-07 00:39:51.000000000 +0200
@@ -73,7 +73,7 @@
 	fprintf(fp, "Cracking started: %s", ctime(&start_time));
 	fprintf(fp, "%s\t%s\n", word, in);
 
-	fprintf(fp, "\nBssid\tKeyNo\tWepKey\tASCII\tEncryption\tElapsed Time");
+	fprintf(fp, "\nBssid\t\t\tKeyNo\tWepKey\t\tASCII\tEncryption\tElapsed Time");
 	fclose(fp);
 }
 
@@ -120,7 +120,7 @@
 			fprintf(fp, "\n");
 			print_hex_array(fp, list->frame.bssid, 6);
 			fprintf(fp, "\t%d", list->frame.key);
-			fprintf(fp, "\tnot cracked\t\t%d sec",
+			fprintf(fp, "\tnot cracked\t\t\t\t%d sec",
 				(int)difftime(now, start_time));
 		}
 		list = list->next;
diff -U 3 -r /src/misc.c src/misc.c
--- src/misc.c	2002-10-24 15:15:42.000000000 +0200
+++ src/misc.c	2004-04-07 00:39:51.000000000 +0200
@@ -40,10 +40,11 @@
 	fprintf(stdout,"WEPATTACK by Dominik Blunk and Alain ");
 	fprintf(stdout,"Girardet - Version %s\n", VERSION);
 	fprintf(stdout,"\nusage: wepattack -f dumpfile [-w wordfile]");
-	fprintf(stdout, " [-m mode] [-n	network]\n");
+	fprintf(stdout, " [-m mode] [-b mac_address] [-n network]\n");
 	fprintf(stdout,"-f dumpfile \tnetwork dumpfile to read\n");
 	fprintf(stdout,"\t\t(in PCAP format as TCPDUMP or ETHEREAL uses)\n");
 	fprintf(stdout,"-w wordlist \twordlist to use (default: stdin)\n");
+	fprintf(stdout,"-b mac_address \tfilter the mac address from the dump file\n");
 	fprintf(stdout,"-m mode \trun wepattack in diffente modes (default: all)\n");
 	fprintf(stdout,"\t\tvalues: 64, 128, n64, n128\n");
 	fprintf(stdout,"-n network \tnetwork number to attack\n");
diff -U 3 -r /src/wepattack.c src/wepattack.c
--- src/wepattack.c	2002-10-24 15:14:29.000000000 +0200
+++ src/wepattack.c	2004-04-07 00:43:56.000000000 +0200
@@ -4,6 +4,8 @@
 * Author: 		Alain Girardet/Dominik Blunk
 * Last Modified:	2002-10-24
 *
+* Send me any suggestions about the patch to kirano_1@hotmail.com
+*
 * Description: Read guessed passwords from stdin and applies RC4
 * on sniffed encrypted 802.11 DATA packets
 *
@@ -57,6 +59,11 @@
 // default mode (all modes sequential)
 static unsigned char use_modes = 0x01;
 
+// to check bssid
+char* BSSID=NULL;
+wlan_packet_list* bssids_list=NULL;
+int is_bssid_set = 0;
+
 void clean_up();
 
 //
@@ -64,7 +71,11 @@
 //
 void load_packets(char *infile, int network) {
 
-	int network_count = 0;
+	int network_count = 0;	
+	wlan_packet_list* aux;
+	wlan_packet_list* aux_2;
+	wlan_packet_list* aux3;
+	char bssid_aux[18],bssid_aux2[13],bssid_aux3[18],bssid_aux4[13];	
 
 	// load networks from file
 	list_packet_to_crack = get_packets(infile);
@@ -77,17 +88,57 @@
 
 	current_packet = list_packet_to_crack;
 
-	// list all available networks
-	printf("\n\nFounded BSSID:");
-	while (current_packet->next != NULL) {
-		network_count++;
-		printf("\n%d)  ", network_count);
-		print_hex_array(stdout, current_packet->frame.bssid, 6);
-		printf("/ Key %d", current_packet->frame.key);
-		current_packet = current_packet->next;
+	//Make another list with provided bssid
+	if (is_bssid_set){		
+		for (aux=current_packet; aux!=NULL;aux=aux->next){
+			sprintf(bssid_aux,"%.2X:%.2X:%.2X:%.2X:%.2X:%.2X",aux->frame.bssid[0],aux->frame.bssid[1],aux->frame.bssid[2],aux->frame.bssid[3],aux->frame.bssid[4],aux->frame.bssid[5]);
+			sprintf(bssid_aux2,"%.2X%.2X%.2X%.2X%.2X%.2X",aux->frame.bssid[0],aux->frame.bssid[1],aux->frame.bssid[2],aux->frame.bssid[3],aux->frame.bssid[4],aux->frame.bssid[5]);
+			sprintf(bssid_aux3,"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",aux->frame.bssid[0],aux->frame.bssid[1],aux->frame.bssid[2],aux->frame.bssid[3],aux->frame.bssid[4],aux->frame.bssid[5]);
+			sprintf(bssid_aux4,"%.2x%.2x%.2x%.2x%.2x%.2x",aux->frame.bssid[0],aux->frame.bssid[1],aux->frame.bssid[2],aux->frame.bssid[3],aux->frame.bssid[4],aux->frame.bssid[5]);			
+			if ((strncmp(bssid_aux,BSSID,17) == 0) || (strncmp(bssid_aux2,BSSID,12) == 0) || (strncmp(bssid_aux3,BSSID,17) == 0) || (strncmp(bssid_aux4,BSSID,12) == 0)){				
+				aux_2 = malloc(sizeof(wlan_packet_list));
+				memcpy(&aux_2->frame.frameControl, aux->frame.frameControl, 2);
+				memcpy(&aux_2->frame.duration, aux->frame.duration, 2);
+				memcpy(&aux_2->frame.srcAddress, aux->frame.srcAddress, 6);
+				memcpy(&aux_2->frame.dstAddress, aux->frame.dstAddress, 6);
+				memcpy(&aux_2->frame.bssid, aux->frame.bssid, 6);
+				if(aux->frame.address4 > 0) {
+					memcpy(&aux_2->frame.address4, aux->frame.address4, 6);
+				}
+				memcpy(&aux_2->frame.sequenceControl, aux->frame.sequenceControl, 2);
+				memcpy(&aux_2->frame.iv, &aux->frame.iv, 3);				
+				aux_2->frame.key=aux->frame.key;				
+				memcpy(&aux_2->frame.payload, aux->frame.payload, (aux->framesize)- (aux->frame.limits_payload));
+				if (bssids_list == NULL){
+					aux3 = malloc(sizeof(wlan_packet_list));
+					aux3->next = NULL;
+					bssids_list = aux3;
+				}
+				aux_2->framesize = aux->framesize;
+				aux_2->next = bssids_list;				
+				bssids_list = aux_2;
+			}
+		}
+		if (bssids_list != NULL){
+		//we must free the old list
+			delete_list(list_packet_to_crack);
+			list_packet_to_crack = bssids_list;
+			current_packet = list_packet_to_crack;
+		}
+		else printf("\n\nProvided BSSID not found. Cracking all networks");
 	}
+	
+	// list all available networks
+            printf("\n\nFounded BSSID:");
+            while (current_packet->next != NULL) {
+	            network_count++;
+				printf("\n%d)  ", network_count);
+				print_hex_array(stdout, current_packet->frame.bssid, 6);
+				printf("/ Key %d", current_packet->frame.key);
+				current_packet = current_packet->next;
+		}																					
 
-	if (network > network_count)
+	if (network >= network_count)
 		network = 0;
 
 	// if only one should be attacked, remove the others from the list
@@ -220,11 +272,15 @@
 
 	// process command line options
 	// program will terminate, if invalid options are passed
-    	while((op = getopt(argc, argv, "n:m:f:w:?")) != -1) {
+    	while((op = getopt(argc, argv, "n:b:m:f:w:?")) != -1) {
     		switch(op) {
 		case 'n':
 			network_arg = atoi(optarg);
 			break;
+		case 'b':
+			BSSID = optarg;
+			is_bssid_set = 1;		
+			break;
                 // arg for packet file to read from
 		case 'f':
                         packet_file = optarg;
diff -U 3 -r /src/wepattack.h src/wepattack.h
--- src/wepattack.h	2002-10-24 15:14:22.000000000 +0200
+++ src/wepattack.h	2004-04-07 00:39:51.000000000 +0200
@@ -38,6 +38,7 @@
 	unsigned char iv[3];
 	unsigned char key;
 	unsigned char payload[2400];
+	int limits_payload;
 };
 
 /*
diff -U 3 -r /src/wepfilter.c src/wepfilter.c
--- src/wepfilter.c	2002-10-24 15:14:13.000000000 +0200
+++ src/wepfilter.c	2004-04-07 00:39:51.000000000 +0200
@@ -104,6 +103,7 @@
 	memcpy(&newframe->frame.key, data+limits.key, 1);
 	newframe->frame.key = newframe->frame.key >> 6;
 	memcpy(&newframe->frame.payload, data+limits.payload, length-limits.payload);
+	newframe->frame.limits_payload = limits.payload;
 	newframe->framesize = length;
 	newframe->next = *head;
 	*head = newframe;