pcap_snapshot - get the snapshot length
#include <pcap/pcap.h>
int pcap_snapshot(pcap_t *p);
pcap_snapshot() returns the snapshot length specified when
pcap_set_snapshot() or pcap_open_live() was called, for a live
capture, or the snapshot length from the capture file, for a ``savefile''.
It must not be called on a pcap descriptor created by
pcap_create() that has not yet been activated by
pcap_activate().
pcap_snapshot() returns the snapshot length on success and
PCAP_ERROR_NOT_ACTIVATED if called on a capture handle that has been
created but not activated.