Add arp_packet struct and parsing in eth_recv

2 files changed, 18 insertions, 1 deletions

diff --git a/include/junk/network.h b/include/junk/network.h
index 73dd127..12a3af0 100644
--- a/include/junk/network.h
+++ b/include/junk/network.h
@@ -2,6 +2,7 @@
 
 
 //Layer 4, TCP
+#include <linux/if_ether.h>
 int tcp_ipv4_send(char* ip, char* port, char* data);
 int tcp_ipv4_recv(char* ip, char* port, char* data);
 int ipv4_bind(char* ip, char* port, char* data);
@@ -11,3 +12,17 @@ int ipv4_bind(char* ip, char* port, char* data);
 int eth_bind(char address[]);
 int eth_send(int sockfd, char* data);
 int eth_recv(int sockfd);
+
+typedef struct ethhdr ethhdr;
+
+typedef struct arp_packet {
+  unsigned char hardware_type[2];
+  unsigned char protocol_type[2];
+  unsigned char hardware_length[1];
+  unsigned char protocol_length[1];
+  unsigned char operation[2];
+  unsigned char sender_hardware_address[6];
+  unsigned char sender_protocol_address[4];
+  unsigned char target_hardware_address[6];
+  unsigned char target_protocol_address[4];
+  } arp_packet;
diff --git a/src/network.c b/src/network.c
index 2174f47..0e32677 100644
--- a/src/network.c
+++ b/src/network.c
@@ -124,10 +124,12 @@ int eth_recv(int sockfd) {
      }
      else {
        fprintf(stderr, "\nCharacters:\n");
-       struct ethhdr* recv_struct = (struct ethhdr*) buffer;
+       ethhdr* recv_struct = (ethhdr*) buffer;
        fprintf(stderr, "%s: source mac (%02x:%02x:%02x:%02x:%02x:%02x)\n", TAG, recv_struct->h_source[0], recv_struct->h_source[1], recv_struct->h_source[2], recv_struct->h_source[3], recv_struct->h_source[4], recv_struct->h_source[5]);
        fprintf(stderr, "%s: dest mac (%02x:%02x:%02x:%02x:%02x:%02x)\n", TAG, recv_struct->h_dest[0], recv_struct->h_dest[1], recv_struct->h_dest[2], recv_struct->h_dest[3], recv_struct->h_dest[4], recv_struct->h_dest[5]);
 
+       arp_packet* packet = (arp_packet*) (buffer + sizeof (ethhdr));
+ 
        return 0;
      }
   }