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--- send_arp.orig/send_arp.c 2002-10-21 14:19:27.000000000 +0900
+++ send_arp/send_arp.c 2002-10-21 14:25:03.000000000 +0900
@@ -33,11 +33,13 @@
#define DEFAULT_DEVICE "eth0"
-char usage[]={"send_arp: sends out custom ARP packet. yuri volobuev'97\n\
-usage: send_arp src_ip_addr src_hw_addr targ_ip_addr targ_hw_addr [targ_int]\n\n"};
+char usage[]={"send_arp: sends out custom ARP packet. yuri volobuev'97\n\n\
+usage: send_arp sndr_ip_addr sndr_hw_addr\n\
+ targ_ip_addr targ_hw_addr\n\
+ [targ_int [src_hw_addr [dest_hw_addr]]]\n\n"};
struct arp_packet {
- u_char targ_hw_addr[ETH_HW_ADDR_LEN];
+ u_char dest_hw_addr[ETH_HW_ADDR_LEN];
u_char src_hw_addr[ETH_HW_ADDR_LEN];
u_short frame_type;
u_short hw_type;
@@ -47,8 +49,8 @@
u_short op;
u_char sndr_hw_addr[ETH_HW_ADDR_LEN];
u_char sndr_ip_addr[IP_ADDR_LEN];
- u_char rcpt_hw_addr[ETH_HW_ADDR_LEN];
- u_char rcpt_ip_addr[IP_ADDR_LEN];
+ u_char targ_hw_addr[ETH_HW_ADDR_LEN];
+ u_char targ_ip_addr[IP_ADDR_LEN];
u_char padding[18];
};
@@ -58,14 +60,14 @@
int main(int argc,char** argv){
-struct in_addr src_in_addr,targ_in_addr;
+struct in_addr sndr_in_addr,targ_in_addr;
struct arp_packet pkt;
struct sockaddr sa;
+int sock;
char *c;
int n;
-int sock;
-if(argc != 5 && argc !=6)die(usage);
+if(argc < 5 || argc > 8) die(usage);
sock=socket(AF_INET,SOCK_PACKET,htons(ETH_P_RARP));
if(sock<0){
@@ -80,20 +82,30 @@
pkt.prot_addr_size = IP_ADDR_LEN;
pkt.op=htons(OP_ARP_REQUEST);
+if ( argc == 8 ) {
+ get_hw_addr(pkt.dest_hw_addr,argv[7]);
+} else {
+ get_hw_addr(pkt.dest_hw_addr,argv[4]);
+}
+
+if ( argc >= 7 ) {
+ get_hw_addr(pkt.src_hw_addr,argv[6]);
+} else {
+ get_hw_addr(pkt.src_hw_addr,argv[2]);
+}
+
get_hw_addr(pkt.targ_hw_addr,argv[4]);
-get_hw_addr(pkt.rcpt_hw_addr,argv[4]);
-get_hw_addr(pkt.src_hw_addr,argv[2]);
get_hw_addr(pkt.sndr_hw_addr,argv[2]);
-get_ip_addr(&src_in_addr,argv[1]);
+get_ip_addr(&sndr_in_addr,argv[1]);
get_ip_addr(&targ_in_addr,argv[3]);
-memcpy(pkt.sndr_ip_addr,&src_in_addr,IP_ADDR_LEN);
-memcpy(pkt.rcpt_ip_addr,&targ_in_addr,IP_ADDR_LEN);
+memcpy(pkt.sndr_ip_addr,&sndr_in_addr,IP_ADDR_LEN);
+memcpy(pkt.targ_ip_addr,&targ_in_addr,IP_ADDR_LEN);
bzero(pkt.padding,18);
-if (argc!=6) {
+if (argc==5) {
strcpy(sa.sa_data,DEFAULT_DEVICE);
} else {
if ((c=strchr(argv[5], ':'))) {
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