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// utils/pcap.h
// helper functions for usage of libpcap
#include <pcap.h>
// get payload from a TCP/IP packet
// params:
// - packet - captured packet
// - packet_data - metadata about packet
// - payload_len - pointer to save the payload length to or -1 if not a correct packet
// returns:
// pointer to the payload or NULL if not a correct packet
extern const unsigned char *get_payload_from_packet(const unsigned char *packet, const struct pcap_pkthdr *packet_data, int *payload_len);
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