@@ -16,11 +16,11 @@

 #include <pcap.h>

 #include "src/lib.h"

+#include "src/ethernet.h"

 void packet_handler(u_char *param,

   const struct pcap_pkthdr *header, const u_char *pkt_data) {

-  printf("caplen : %d\n", header->caplen);

-  printf("len : %d\n", header->len);

+  dump_ethernet_header(pkt_data);

 }

 int main(int argc, char **argv) {

@@ -7,4 +7,35 @@

  *     Copyright:  Copyright (c) 2018, HiSEON

  */

+#include <stdio.h>

+#include <arpa/inet.h>

+#include <net/ethernet.h>

+

 #include "src/ethernet.h"

+

+void dump_ethernet_header(const u_char *pkt_data) {

+  struct ether_header *header = (struct ether_header *)pkt_data;

+

+  const char *name = NULL;

+

+  u_int8_t *dmac = header->ether_dhost;

+  u_int8_t *smac = header->ether_shost;

+  u_int16_t type = ntohs(header->ether_type);

+

+  switch (type) {

+    case ETHERTYPE_IP:

+      name = "IP";

+      break;

+    case ETHERTYPE_ARP:

+      name = "ARP";

+      break;

+    default:

+      name = "Unknwon";

+      break;

+  }

+

+  printf("%02x:%02x:%02x:%02x:%02x:%02x => " \

+      "%02x:%02x:%02x:%02x:%02x:%02x (%s) \n",

+  smac[0], smac[1], smac[2], smac[3], smac[4], smac[5],

+  dmac[0], dmac[1], dmac[2], dmac[3], dmac[4], dmac[5], name);

+}

@@ -10,6 +10,8 @@

 #ifndef SRC_ETHERNET_H_

 #define SRC_ETHERNET_H_

+#include <sys/types.h>

+void dump_ethernet_header(const u_char *pkt_data);

 #endif  // SRC_ETHERNET_H_