+
+
+ /* ieee802.3 */
+ /* ethernet */
+ e_hdr=(struct ethhdr *)package;
+ /* what types ? */
+ printf("type = ");
+ printf("%x ",ntohs(e_hdr->h_proto));
+ printf("dest_addr = ");
+ for(i=0;i<ETH_ALEN;i++)
+ printf("%x%s",*(e_hdr->h_dest+i),((i==ETH_ALEN-1)?" ":":"));
+ printf(" src_addr = ");
+ for(i=0;i<ETH_ALEN;i++)
+ printf("%x%s",*(e_hdr->h_source+i),((i==ETH_ALEN-1)?"\n":":"));
+ /* IP ? */
+ if(ntohs(e_hdr->h_proto)==ETH_P_IP) {
+ printf("ip protocol: ");
+ ip_hdr=(struct ip *)(package+sizeof(struct ethhdr));
+ printf("version = %x ",ntohs(ip_hdr->ip_v));
+ printf("header_length = %x \n",ntohs(ip_hdr->ip_hl));
+ printf("service = %x ",ntohs(ip_hdr->ip_tos));
+ printf("total_length(dec.) = %d \n",ntohs(ip_hdr->ip_len));
+ printf("ip_addresses: source = ");
+ printf("%s\tdestination = %s\n",inet_ntoa(ip_hdr->ip_src),
+ inet_ntoa(ip_hdr->ip_dst));
+ printf("ip_id = %x ",ntohs(ip_hdr->ip_id));
+ printf("ip_offset = %x \n",ntohs(ip_hdr->ip_off));
+ printf("time2live = %x ip_proto = %x\n",ntohs(ip_hdr->ip_ttl),
+ ntohs(ip_hdr->ip_p));
+ printf("chksum: %x\n",ntohs(ip_hdr->ip_sum));