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Changed the way we receive ARP packet

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Dimitri Lozeve 2016-06-03 16:43:17 +02:00
parent a7ac904e54
commit 46d057aab9
1 changed files with 6 additions and 3 deletions
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9
arp.c
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@ -184,11 +184,14 @@ int send_arp_reply(int sockfd, int ifindex, struct sockaddr_in *sender_ip, unsig
int listen_arp_frame(int sockfd, struct ether_arp *result) int listen_arp_frame(int sockfd, struct ether_arp *result)
{ {
int count = 0; int count = 0;
int len = recv(sockfd, result, sizeof(struct ether_arp), 0);
while (recv(sockfd, result, sizeof(struct ether_arp), 0) && count < 20) { while (len > 0 && count < 20) {
/* skip to the next frame if it's not an ARP REPLY */ /* skip to the next frame if it's not an ARP REPLY */
if (ntohs (result->arp_op) != ARPOP_REPLY) { if (ntohs (result->arp_op) != ARPOP_REPLY) {
++count; ++count;
//printf("Operation: %d\n", ntohs(result->arp_op));
recv(sockfd, result, sizeof(struct ether_arp), 0);
continue; continue;
} }
@ -220,9 +223,9 @@ int listen_arp_frame(int sockfd, struct ether_arp *result)
return 0; return 0;
} }
#ifdef DEBUG
printf("[FAIL] No frame received\n"); printf("[FAIL] No frame received\n");
#endif
return -1; return -1;
} }