+ if(argc<2) {
+ printf("usage: %s <interface> <logfile>\n",argv[0]);
+ return 0;
+ }
+ if(argc!=3) {
+ printf("no logfile specified, writing to stdout ...\n");
+ }
+
+ /* start pcap session */
+ pcap_handle=pcap_open_live(argv[1],BUFSIZ,1,-1,pcap_error);
+ if(pcap_handle==NULL) {
+ printf("%s: %s\n",argv[0],pcap_error);
+ return 1;
+ }
+
+ /* grab a package until user breaks */
+ count=0;
+ while (count<MAX_PACKAGES) {
+ count++;
+ printf("\n");
+ if((package=pcap_next(pcap_handle,&pcap_header))!=NULL) {
+ printf("---> package %d ---- %s",count,
+ ctime((const time_t*)&pcap_header.ts.tv_sec));
+ printf("pcap header: ");
+ printf("capture length=%d ",pcap_header.caplen);
+ printf("length(off wire)=%d\n",pcap_header.len);
+ }
+
+ /* is ieee802.11 ? -- we assume yes :) */
+
+
+ /* ethernet */
+ e_hdr=(struct ethhdr *)package;
+ /* what types ? */
+ printf("types = ");
+ 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));
+ // i=0;
+ //printf("service = %x ",*(ip_hdr->ip_tos));
+ //printf("total_length(dec.) = %hu \n",*(ip_hdr->ip_len));
+ //printf("ip_addresses: source = ");
+ //for(i=0;i<4;i++)
+ // printf("%x%s",*(ip_hdr->ip_src+i),
+ // (i==3?"\n":"."));
+
+
+ }
+ printf("rest:\n");
+ for(i=sizeof(struct ethhdr);i<pcap_header.caplen;i++)
+ printf("%x ",*(package+i));
+ printf("\n");
+ }
+ printf("\n");
+ printf("wake up early! :)\n");
+ printf("\n");
+}