#include <stdlib.h>
#include <stdio.h>
#include <pcap.h>

/* definitions */

enum dp_packet_type {
	dp_packet_ethernet,
	dp_packet_ppp,
	dp_packet_ip,
	dp_packet_ip6,
	dp_packet_tcp,
	dp_packet_udp,
	dp_n_packet_types
};

enum dp_link_type {
	dp_link_ethernet,
	dp_link_ppp,
	dp_n_link_types
};

/*struct dp_header {
};*/
typedef struct pcap_pkthdr dp_header;

typedef int (*dp_callback)(u_char *, const dp_header *, const u_char *);

struct dp_handle {
	pcap_t * pcap_handle;
	dp_callback callback [dp_n_packet_types];
	enum dp_link_type linktype;
	u_char * userdata;
	int userdata_size;
};

/* functions to set up a handle (which is basically just a pcap handle) */

struct dp_handle * dp_open_live(char * device, enum dp_link_type link, int snaplen, int promisc, int to_ms, char * ebuf);

/* functions to add callbacks */

void dp_addcb (struct dp_handle * handle, enum dp_packet_type type, dp_callback callback);

/* functions to parse payloads */

void dp_parse (enum dp_packet_type type, void * packet);

/* functions to start monitoring */

int dp_dispatch (struct dp_handle * handler, int count, u_char *user, int size);