pcap_file_header
struct pcap_file_header pfh;
if (pf->filesize < sizeof(struct pcap_file_header)) {
pf->cur = pf->data + sizeof(struct pcap_file_header);
pf->cur = pf->data + sizeof(struct pcap_file_header);
pf->cur = pf->data + sizeof(struct pcap_file_header);
pf->cur = pf->data + sizeof(struct pcap_file_header);