[apple/ipsec.git] / ipsec-tools / racoon / nattraversal.h

/*
 * Copyright (C) 2004 SuSE Linux AG, Nuernberg, Germany.
 * Contributed by: Michal Ludvig <mludvig@suse.cz>, SUSE Labs
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _NATTRAVERSAL_H
#define _NATTRAVERSAL_H

#include "vendorid.h"

#ifdef __APPLE__
#define UDP_ENCAP_ESPINUDP	2	/* to make it compile - we don't use this */
#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

/* These are the values from parsing "remote {}" 
   block of the config file. */
#define NATT_OFF	FALSE	/* = 0 */
#define NATT_ON		TRUE	/* = 1 */
#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; /* ESPINUDP / ESPINUDP_NON_IKE */
  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__
/* NAT keepalive functions */
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

/* Walk through all rmconfigs and tell if NAT-T is enabled in at least one. */
int natt_enabled_in_rmconf (void);

#endif /* _NATTRAVERSAL_H */
Commit	Line	Data
52b7d2ce A	1	/*
	2	* Copyright (C) 2004 SuSE Linux AG, Nuernberg, Germany.
	3	* Contributed by: Michal Ludvig <mludvig@suse.cz>, SUSE Labs
	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	* 3. Neither the name of the project nor the names of its contributors
	15	* may be used to endorse or promote products derived from this software
	16	* without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	28	* SUCH DAMAGE.
	29	*/
	30
	31	#ifndef _NATTRAVERSAL_H
	32	#define _NATTRAVERSAL_H
	33
	34	#include "vendorid.h"
	35
	36	#ifdef __APPLE__
	37	#define UDP_ENCAP_ESPINUDP 2 /* to make it compile - we don't use this */
	38	#endif
	39
	40	#define NAT_ANNOUNCED (1L<<0)
	41	#define NAT_DETECTED_ME (1L<<1)
	42	#define NAT_DETECTED_PEER (1L<<2)
	43	#define NAT_PORTS_CHANGED (1L<<3)
	44	#define NAT_KA_QUEUED (1L<<4)
	45	#define NAT_ADD_NON_ESP_MARKER (1L<<5)
	46
	47	#define NATT_AVAILABLE(ph1) ((iph1)->natt_flags & NAT_ANNOUNCED)
	48
	49	#define NAT_DETECTED (NAT_DETECTED_ME \| NAT_DETECTED_PEER)
	50
	51	#define NON_ESP_MARKER_LEN sizeof(u_int32_t)
	52	#define NON_ESP_MARKER_USE(iph1) ((iph1)->natt_flags & NAT_ADD_NON_ESP_MARKER)
	53
d1e348cf A	54	#ifdef ENABLE_NATT
	55	#ifdef ENABLE_FRAG
	56	#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))
	57	#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))
	58	#else
	59	#define PH1_NON_ESP_EXTRA_LEN(iph1) (NON_ESP_MARKER_USE(iph1) ? NON_ESP_MARKER_LEN : 0)
	60	#define PH2_NON_ESP_EXTRA_LEN(iph2) (NON_ESP_MARKER_USE(iph2->ph1) ? NON_ESP_MARKER_LEN : 0)
	61	#endif
	62	#else
	63	#define PH1_NON_ESP_EXTRA_LEN(iph1) 0
	64	#define PH2_NON_ESP_EXTRA_LEN(iph2) 0
	65	#endif
	66
52b7d2ce A	67	/* These are the values from parsing "remote {}"
	68	block of the config file. */
	69	#define NATT_OFF FALSE /* = 0 */
	70	#define NATT_ON TRUE /* = 1 */
	71	#define NATT_FORCE 2
	72
	73	struct ph1natt_options {
	74	int version;
	75	u_int16_t float_port;
	76	u_int16_t mode_udp_tunnel;
	77	u_int16_t mode_udp_transport;
	78	u_int16_t encaps_type; /* ESPINUDP / ESPINUDP_NON_IKE */
	79	u_int16_t mode_udp_diff;
	80	u_int16_t payload_nat_d;
	81	u_int16_t payload_nat_oa;
	82	};
	83
	84	struct ph2natt {
	85	u_int8_t type;
	86	u_int16_t sport;
	87	u_int16_t dport;
	88	struct sockaddr *oa;
	89	u_int16_t frag;
	90	};
	91
	92	int natt_vendorid (int vid);
	93	vchar_t natt_hash_addr (struct ph1handle iph1, struct sockaddr *addr);
	94	int natt_compare_addr_hash (struct ph1handle iph1, vchar_t natd_received, int natd_seq);
	95	int natt_udp_encap (int encmode);
	96	int natt_fill_options (struct ph1natt_options *opts, int version);
	97	void natt_float_ports (struct ph1handle *iph1);
	98	void natt_handle_vendorid (struct ph1handle *iph1, int vid_numeric);
52b7d2ce	99	int create_natoa_payloads(struct ph2handle iph2, vchar_t , vchar_t *);
d1e348cf	100	struct sockaddr * process_natoa_payload(vchar_t *buf);
52b7d2ce A	101
	102	struct payload_list *
	103	isakmp_plist_append_natt_vids (struct payload_list plist, vchar_t vid_natt[MAX_NATT_VID_COUNT]);
	104
	105	#ifndef __APPLE__
	106	/* NAT keepalive functions */
	107	void natt_keepalive_init (void);
	108	int natt_keepalive_add (struct sockaddr src, struct sockaddr dst);
	109	int natt_keepalive_add_ph1 (struct ph1handle *iph1);
	110	void natt_keepalive_remove (struct sockaddr src, struct sockaddr dst);
	111	#endif
	112
	113	/* Walk through all rmconfigs and tell if NAT-T is enabled in at least one. */
	114	int natt_enabled_in_rmconf (void);
	115
	116	#endif /* _NATTRAVERSAL_H */