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Better handling of listen_arp_frame failure

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This commit is contained in:
Dimitri Lozeve 2016-06-04 10:07:10 +02:00
parent 0d66824635
commit e8dde3776f
1 changed files with 13 additions and 3 deletions
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16
arp.c
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@ -224,8 +224,10 @@ int listen_arp_frame(int sockfd, struct ether_arp *result)
}
#ifdef DEBUG
printf("[FAIL] No frame received\n");
#endif
return -1;
}
@ -318,7 +320,11 @@ int arp_mitm(int sockfd, int ifindex, struct sockaddr_in *ipaddr, unsigned char
hardware addresses. */
send_arp_request(sockfd, ifindex, ipaddr, macaddr, *target1_ip);
struct ether_arp reply1;
listen_arp_frame(sockfd, &reply1);
int n = listen_arp_frame(sockfd, &reply1);
if (n != 0) {
printf("[FAIL] No frame received\n");
exit(EXIT_FAILURE);
}
unsigned char *macaddr1 = reply1.arp_sha;
printf("Target 1 hardware address: %02x:%02x:%02x:%02x:%02x:%02x\n",
macaddr1[0],macaddr1[1],macaddr1[2],
@ -326,7 +332,11 @@ int arp_mitm(int sockfd, int ifindex, struct sockaddr_in *ipaddr, unsigned char
send_arp_request(sockfd, ifindex, ipaddr, macaddr, *target2_ip);
struct ether_arp reply2;
listen_arp_frame(sockfd, &reply2);
n = listen_arp_frame(sockfd, &reply2);
if (n != 0) {
printf("[FAIL] No frame received\n");
exit(EXIT_FAILURE);
}
unsigned char *macaddr2 = reply2.arp_sha;
printf("Target 2 hardware address: %02x:%02x:%02x:%02x:%02x:%02x\n",
macaddr2[0],macaddr2[1],macaddr2[2],