/*	$NetBSD: remoteconf.h,v 1.16 2011/03/14 15:50:36 vanhu Exp $	*/

/* Id: remoteconf.h,v 1.26 2006/05/06 15:52:44 manubsd Exp */

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * 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 _REMOTECONF_H
#define _REMOTECONF_H

/* remote configuration */

#include <sys/queue.h>
#include "genlist.h"
#ifdef ENABLE_HYBRID
#include "isakmp_var.h"
#include "isakmp_xauth.h"
#endif

struct ph1handle;
struct secprotospec;

struct etypes {
	int type;
	struct etypes *next;
};

/* ISAKMP SA specification */
struct isakmpsa {
	int prop_no;
	int trns_no;
	time_t lifetime;
	size_t lifebyte;
	int enctype;
	int encklen;
	int authmethod;
	int hashtype;
	int vendorid;
#ifdef HAVE_GSSAPI
	vchar_t *gssid;
#endif
	int dh_group;			/* don't use it if aggressive mode */
	struct dhgroup *dhgrp;		/* don't use it if aggressive mode */

	struct isakmpsa *next;		/* next transform */
};

/* Certificate information */
struct rmconf_cert {
	vchar_t *data;			/* certificate payload */
	char *filename;			/* name of local file */
};

/* Script hooks */
#define SCRIPT_PHASE1_UP	0
#define SCRIPT_PHASE1_DOWN	1
#define SCRIPT_PHASE1_DEAD	2
#define SCRIPT_MAX		2
extern char *script_names[SCRIPT_MAX + 1];

struct remoteconf {
	char *name;			/* remote configuration name */
	struct sockaddr *remote;	/* remote IP address */
					/* if family is AF_UNSPEC, that is
					 * for anonymous configuration. */

	struct etypes *etypes;		/* exchange type list. the head
					 * is a type to be sent first. */
	int doitype;			/* doi type */
	int sittype;			/* situation type */

	int idvtype;			/* my identifier type */
	vchar_t *idv;			/* my identifier */
	vchar_t *key;			/* my pre-shared key */
	struct genlist *idvl_p;         /* peer's identifiers list */

	char *myprivfile;		/* file name of my private key file */
	char *mycertfile;		/* file name of my certificate */
	vchar_t *mycert;		/* my certificate */
	char *peerscertfile;		/* file name of peer's certifcate */
	vchar_t *peerscert;		/* peer's certificate */
	char *cacertfile;		/* file name of CA */
	vchar_t *cacert;		/* CA certificate */

	int send_cert;			/* send to CERT or not */
	int send_cr;			/* send to CR or not */
	int match_empty_cr;		/* does this match if CR is empty */
	int verify_cert;		/* verify a CERT strictly */
	int verify_identifier;		/* vefify the peer's identifier */
	int nonce_size;			/* the number of bytes of nonce */
	int passive;			/* never initiate */
	int ike_frag;			/* IKE fragmentation */
	int esp_frag;			/* ESP fragmentation */
	int mode_cfg;			/* Gets config through mode config */
	int support_proxy;		/* support mip6/proxy */
#define GENERATE_POLICY_NONE	0
#define GENERATE_POLICY_REQUIRE	1
#define GENERATE_POLICY_UNIQUE	2
	int gen_policy;			/* generate policy if no policy found */
	int ini_contact;		/* initial contact */
	int pcheck_level;		/* level of propocl checking */
	int nat_traversal;		/* NAT-Traversal */
	vchar_t *script[SCRIPT_MAX + 1];/* script hooks paths */
	int dh_group;			/* use it when only aggressive mode */
	struct dhgroup *dhgrp;		/* use it when only aggressive mode */
					/* above two can't be defined by user*/

	int dpd;				/* Negociate DPD support ? */
	int dpd_retry;			/* in seconds */
	int dpd_interval;		/* in seconds */
	int dpd_maxfails;

	int rekey;			/* rekey ph1 when active ph2s? */
#define REKEY_OFF		FALSE
#define REKEY_ON		TRUE
#define REKEY_FORCE		2

	uint32_t ph1id; /* ph1id to be matched with sainfo sections */

	int weak_phase1_check;		/* act on unencrypted deletions ? */

	struct isakmpsa *proposal;	/* proposal list */
	struct remoteconf *inherited_from;	/* the original rmconf 
						   from which this one 
						   was inherited */

	time_t lifetime;		/* for isakmp/ipsec */
	int lifebyte;			/* for isakmp/ipsec */
	struct secprotospec *spspec;	/* the head is always current spec. */

	struct genlist	*rsa_private,	/* lists of PlainRSA keys to use */
			*rsa_public;

#ifdef ENABLE_HYBRID
	struct xauth_rmconf *xauth;
#endif

	TAILQ_ENTRY(remoteconf) chain;	/* next remote conf */
};

#define RMCONF_NONCE_SIZE(rmconf) \
	(rmconf != NULL ? rmconf->nonce_size : DEFAULT_NONCE_SIZE)

struct dhgroup;

struct idspec {
	int idtype;                     /* identifier type */
	vchar_t *id;                    /* identifier */
};

struct rmconfselector {
	int flags;
	struct sockaddr *remote;
	int etype;
	struct isakmpsa *approval;
	vchar_t *identity;
	vchar_t *certificate_request;
};

extern void rmconf_selector_from_ph1 __P((struct rmconfselector *rmsel,
					  struct ph1handle *iph1));
extern int enumrmconf __P((struct rmconfselector *rmsel,
			   int (* enum_func)(struct remoteconf *rmconf, void *arg),
			   void *enum_arg));

#define GETRMCONF_F_NO_ANONYMOUS	0x0001
#define GETRMCONF_F_NO_PASSIVE		0x0002

#define RMCONF_ERR_MULTIPLE		((struct remoteconf *) -1)

extern int rmconf_match_identity __P((struct remoteconf *rmconf,
				      vchar_t *id_p));
extern struct remoteconf *getrmconf __P((struct sockaddr *remote, int flags));
extern struct remoteconf *getrmconf_by_ph1 __P((struct ph1handle *iph1));
extern struct remoteconf *getrmconf_by_name __P((const char *name));

extern struct remoteconf *newrmconf __P((void));
extern struct remoteconf *duprmconf_shallow __P((struct remoteconf *));
extern int duprmconf_finish __P((struct remoteconf *));
extern void delrmconf __P((struct remoteconf *));
extern void deletypes __P((struct etypes *));
extern struct etypes * dupetypes __P((struct etypes *));
extern void insrmconf __P((struct remoteconf *));
extern void remrmconf __P((struct remoteconf *));
extern void flushrmconf __P((void));
extern void dupspspec_list __P((struct remoteconf *, struct remoteconf *));
extern void flushspspec __P((struct remoteconf *));
extern void initrmconf __P((void));
extern void rmconf_start_reload __P((void));
extern void rmconf_finish_reload __P((void));

extern int check_etypeok __P((struct remoteconf *, void *));

extern struct isakmpsa *newisakmpsa __P((void));
extern struct isakmpsa *dupisakmpsa __P((struct isakmpsa *));
extern void delisakmpsa __P((struct isakmpsa *));
extern void insisakmpsa __P((struct isakmpsa *, struct remoteconf *));
#ifdef ENABLE_HYBRID
extern int isakmpsa_switch_authmethod __P((int authmethod));
#else
static inline int isakmpsa_switch_authmethod(int authmethod)
{
	return authmethod;
}
#endif
extern struct isakmpsa * checkisakmpsa __P((int pcheck,
					    struct isakmpsa *proposal,
					    struct isakmpsa *acceptable));


extern void dumprmconf __P((void));

extern struct idspec *newidspec __P((void));

extern vchar_t *script_path_add __P((vchar_t *));

#endif /* _REMOTECONF_H */