#ifndef _LIBGGNET_TRACEROUTE_H
#define _LIBGGNET_TRACEROUTE_H 1

#include <event.h>
#include <dnet.h>
#include <pcap.h>

#if defined(__OpenBSD__)
#include <sys/queue.h>
#else
#include <bsd/sys/queue.h>
#endif

#define TRACEROUTE_NB_PROBES 3

enum tracemode {
	TRACEMODE_ICMP = 0,
	TRACEMODE_TCP = 1,
	TRACEMODE_TCP_INTRACE = 2,
};

struct ggnet_traceroute_hop {
	TAILQ_ENTRY(ggnet_traceroute_hop) entry;
	int	ttl;
	int	answer_count; /* on TRACEROUTE_NB_PROBES sent probes */
	char	answer[2 * TRACEROUTE_NB_PROBES];
	int	ip_ids[TRACEROUTE_NB_PROBES];
	int	sports[TRACEROUTE_NB_PROBES];
	struct addr ip;
	struct timeval sendtime;
	float	delay;
	float	delay_dev;
	float	loss;
	float	loss_dev;
	int	asn;
};

struct ggnet_traceroute_req_params {
	enum tracemode mode;
	struct {
		int id;
	} ip;
	union {
		struct {
			int dport;
			int sport;
		} tcp;
		struct icmp {
		} icmp;
	};
};

struct ggnet_traceroute_req {
	LIST_ENTRY(ggnet_traceroute_req) entry;
	struct ggnet_traceroute_hop *target;
	struct addr srcip;
	struct ggnet_traceroute_req_params *params;
	int hopcount_total;
	int hopcount_answering;
	TAILQ_HEAD(tailhead, ggnet_traceroute_hop) hops_list;
	struct {
		struct event *ev_recv;
		struct event *ev_send;
		struct event *ev_timeout;
		struct timeval tv_timeout;
		int last_ttl_sent;
	} run;
	void (*cb_done)(struct ggnet_traceroute_req *, void *);
	void (*cb_hop)(struct ggnet_traceroute_req *,
			struct ggnet_traceroute_hop *, void *);
	void  *data;
	struct ggnet_traceroute *ggtr;
};

struct ggnet_traceroute {
	struct event_base *ev_base;
	pcap_t	*pcap;
	intf_t	*intf;
	ip_t	*pkt_ip;
	rand_t	*pkt_rand;
	int      pcap_fd;
	int	 pcap_dllen;		/* datalink layer hdr len */
	int	 req_pending;
	int	 verbose;
	LIST_HEAD(, ggnet_traceroute_req) req_list;
};

struct ggnet_traceroute *
		ggnet_traceroute_new(struct event_base *, char *, int);
void		ggnet_traceroute_free(struct ggnet_traceroute *);
struct ggnet_traceroute_req *
		ggnet_traceroute_trace_tcp(struct ggnet_traceroute *,
			struct addr *ip, int dport,
			void (*cb_done)(struct ggnet_traceroute_req *, void *),
			void (*cb_hop)(struct ggnet_traceroute_req *,
				struct ggnet_traceroute_hop *, void *),
			void *);
struct ggnet_traceroute_req *
		ggnet_traceroute_trace_tcp_intrace(struct ggnet_traceroute *,
			struct addr *ip, int, int, int,
			void (*cb_done)(struct ggnet_traceroute_req *, void *),
			void (*cb_hop)(struct ggnet_traceroute_req *,
				struct ggnet_traceroute_hop *, void *),
			void *);
struct ggnet_traceroute_req *
		ggnet_traceroute_trace(struct ggnet_traceroute *,
			struct addr *ip, struct ggnet_traceroute_req_params *,
			void (*cb_done)(struct ggnet_traceroute_req *, void *),
			void (*cb_hop)(struct ggnet_traceroute_req *,
				struct ggnet_traceroute_hop *, void *),
			void *);
void		ggnet_traceroute_trace_free(struct ggnet_traceroute_req *);
char *ggnet_traceroute_report(struct ggnet_traceroute_req *);

#endif /* _LIBGGNET_TRACEROUTE_H */