#ifndef _NATTRAVERSAL_H
#define _NATTRAVERSAL_H
#include "vendorid.h"
#ifdef __APPLE__
#define UDP_ENCAP_ESPINUDP 2
#endif
#define NAT_ANNOUNCED (1L<<0)
#define NAT_DETECTED_ME (1L<<1)
#define NAT_DETECTED_PEER (1L<<2)
#define NAT_PORTS_CHANGED (1L<<3)
#define NAT_KA_QUEUED (1L<<4)
#define NAT_ADD_NON_ESP_MARKER (1L<<5)
#define NATT_AVAILABLE(ph1) ((iph1)->natt_flags & NAT_ANNOUNCED)
#define NAT_DETECTED (NAT_DETECTED_ME | NAT_DETECTED_PEER)
#define NON_ESP_MARKER_LEN sizeof(u_int32_t)
#define NON_ESP_MARKER_USE(iph1) ((iph1)->natt_flags & NAT_ADD_NON_ESP_MARKER)
#ifdef ENABLE_NATT
#ifdef ENABLE_FRAG
#define PH1_NON_ESP_EXTRA_LEN(iph1) ((iph1->frag && iph1->sendbuf->l > ISAKMP_FRAG_MAXLEN) ? 0: (NON_ESP_MARKER_USE(iph1) ? NON_ESP_MARKER_LEN : 0))
#define PH2_NON_ESP_EXTRA_LEN(iph2) ((iph2->ph1->frag && iph2->sendbuf->l > ISAKMP_FRAG_MAXLEN) ? 0: (NON_ESP_MARKER_USE(iph2->ph1) ? NON_ESP_MARKER_LEN : 0))
#else
#define PH1_NON_ESP_EXTRA_LEN(iph1) (NON_ESP_MARKER_USE(iph1) ? NON_ESP_MARKER_LEN : 0)
#define PH2_NON_ESP_EXTRA_LEN(iph2) (NON_ESP_MARKER_USE(iph2->ph1) ? NON_ESP_MARKER_LEN : 0)
#endif
#else
#define PH1_NON_ESP_EXTRA_LEN(iph1) 0
#define PH2_NON_ESP_EXTRA_LEN(iph2) 0
#endif
#define NATT_OFF FALSE
#define NATT_ON TRUE
#define NATT_FORCE 2
struct ph1natt_options {
int version;
u_int16_t float_port;
u_int16_t mode_udp_tunnel;
u_int16_t mode_udp_transport;
u_int16_t encaps_type;
u_int16_t mode_udp_diff;
u_int16_t payload_nat_d;
u_int16_t payload_nat_oa;
};
struct ph2natt {
u_int8_t type;
u_int16_t sport;
u_int16_t dport;
struct sockaddr *oa;
u_int16_t frag;
};
int natt_vendorid (int vid);
vchar_t *natt_hash_addr (struct ph1handle *iph1, struct sockaddr *addr);
int natt_compare_addr_hash (struct ph1handle *iph1, vchar_t *natd_received, int natd_seq);
int natt_udp_encap (int encmode);
int natt_fill_options (struct ph1natt_options *opts, int version);
void natt_float_ports (struct ph1handle *iph1);
void natt_handle_vendorid (struct ph1handle *iph1, int vid_numeric);
int create_natoa_payloads(struct ph2handle *iph2, vchar_t **, vchar_t **);
struct sockaddr * process_natoa_payload(vchar_t *buf);
struct payload_list *
isakmp_plist_append_natt_vids (struct payload_list *plist, vchar_t *vid_natt[MAX_NATT_VID_COUNT]);
#ifndef __APPLE__
void natt_keepalive_init (void);
int natt_keepalive_add (struct sockaddr *src, struct sockaddr *dst);
int natt_keepalive_add_ph1 (struct ph1handle *iph1);
void natt_keepalive_remove (struct sockaddr *src, struct sockaddr *dst);
#endif
int natt_enabled_in_rmconf (void);
#endif