nm_pcap_file
static struct nm_pcap_file *readpcap(const char *fn);
static void destroy_pcap(struct nm_pcap_file *file);
static void destroy_pcap(struct nm_pcap_file *pf)
read_next_info(struct nm_pcap_file *pf, int size)
static struct nm_pcap_file *
struct nm_pcap_file _f, *pf = &_f;
struct nm_pcap_file *pcap; /* the pcap struct */
struct nm_pcap_file *pf = q->pcap; /* already opened by readpcap */