#include <pcap/pcap.h> pcap_t *pcap_open_dead(int linktype, int snaplen);
pcap_open_dead() is used for creating a pcap_t structure to use when calling the other functions in libpcap. It is typically used when just using libpcap for compiling BPF code.
linktype specifies the link-layer type for the pcap_t.
snaplen specifies the snapshot length for the pcap_t.