/* $OpenBSD: pfkeyv2.h,v 1.50 2004/01/27 09:27:17 markus Exp $ */
/*
 *	@(#)COPYRIGHT	1.1 (NRL) January 1998
 * 
 * NRL grants permission for redistribution and use in source and binary
 * forms, with or without modification, of the software and documentation
 * created at NRL 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgements:
 * 	This product includes software developed by the University of
 * 	California, Berkeley and its contributors.
 * 	This product includes software developed at the Information
 * 	Technology Division, US Naval Research Laboratory.
 * 4. Neither the name of the NRL nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL 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 NRL 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.
 * 
 * The views and conclusions contained in the software and documentation
 * are those of the authors and should not be interpreted as representing
 * official policies, either expressed or implied, of the US Naval
 * Research Laboratory (NRL).
 */

#ifndef _NET_PFKEY_V2_H_
#define _NET_PFKEY_V2_H_

#define PF_KEY_V2			2
#define PFKEYV2_REVISION		199806L

/* This should be updated whenever the API is altered.  */
#define _OPENBSD_IPSEC_API_VERSION	2

#define SADB_RESERVED      0
#define SADB_GETSPI        1
#define SADB_UPDATE        2
#define SADB_ADD           3
#define SADB_DELETE        4
#define SADB_GET           5
#define SADB_ACQUIRE       6
#define SADB_REGISTER      7
#define SADB_EXPIRE        8
#define SADB_FLUSH         9
#define SADB_DUMP          10
#define SADB_X_PROMISC     11
#define SADB_X_ADDFLOW     12
#define SADB_X_DELFLOW     13
#define SADB_X_GRPSPIS     14
#define SADB_X_ASKPOLICY   15
#define SADB_MAX           15

struct sadb_msg {
	uint8_t sadb_msg_version;
	uint8_t sadb_msg_type;
	uint8_t sadb_msg_errno;
	uint8_t sadb_msg_satype;
	uint16_t sadb_msg_len;
	uint16_t sadb_msg_reserved;
	uint32_t sadb_msg_seq;
	uint32_t sadb_msg_pid;
};

struct sadb_ext {
	uint16_t sadb_ext_len;
	uint16_t sadb_ext_type;
};

struct sadb_sa {
	uint16_t sadb_sa_len;
	uint16_t sadb_sa_exttype;
	uint32_t sadb_sa_spi;
	uint8_t sadb_sa_replay;
	uint8_t sadb_sa_state;
	uint8_t sadb_sa_auth;
	uint8_t sadb_sa_encrypt;
	uint32_t sadb_sa_flags;
};

struct sadb_lifetime {
	uint16_t sadb_lifetime_len;
	uint16_t sadb_lifetime_exttype;
	uint32_t sadb_lifetime_allocations;
	uint64_t sadb_lifetime_bytes;
	uint64_t sadb_lifetime_addtime;
	uint64_t sadb_lifetime_usetime;
};

struct sadb_address {
	uint16_t sadb_address_len;
	uint16_t sadb_address_exttype;
	uint32_t sadb_address_reserved;
};

struct sadb_key {
	uint16_t sadb_key_len;
	uint16_t sadb_key_exttype;
	uint16_t sadb_key_bits;
	uint16_t sadb_key_reserved;
};

struct sadb_ident {
	uint16_t sadb_ident_len;
	uint16_t sadb_ident_exttype;
	uint16_t sadb_ident_type;
	uint16_t sadb_ident_reserved;
	uint64_t sadb_ident_id;
};

struct sadb_sens {
	uint16_t sadb_sens_len;
	uint16_t sadb_sens_exttype;
	uint32_t sadb_sens_dpd;
	uint8_t sadb_sens_sens_level;
	uint8_t sadb_sens_sens_len;
	uint8_t sadb_sens_integ_level;
	uint8_t sadb_sens_integ_len;
	uint32_t sadb_sens_reserved;
};

struct sadb_prop {
	uint16_t sadb_prop_len;
	uint16_t sadb_prop_exttype;
	uint8_t sadb_prop_num;
	uint8_t sadb_prop_replay;
	uint16_t sadb_prop_reserved;
};

struct sadb_comb {
	uint8_t sadb_comb_auth;
	uint8_t sadb_comb_encrypt;
	uint16_t sadb_comb_flags;
	uint16_t sadb_comb_auth_minbits;
	uint16_t sadb_comb_auth_maxbits;
	uint16_t sadb_comb_encrypt_minbits;
	uint16_t sadb_comb_encrypt_maxbits;
	uint32_t sadb_comb_reserved;
	uint32_t sadb_comb_soft_allocations;
	uint32_t sadb_comb_hard_allocations;
	uint64_t sadb_comb_soft_bytes;
	uint64_t sadb_comb_hard_bytes;
	uint64_t sadb_comb_soft_addtime;
	uint64_t sadb_comb_hard_addtime;
	uint64_t sadb_comb_soft_usetime;
	uint64_t sadb_comb_hard_usetime;
};

struct sadb_supported {
	uint16_t sadb_supported_len;
	uint16_t sadb_supported_exttype;
	uint32_t sadb_supported_reserved;
};

struct sadb_alg {
	uint8_t sadb_alg_id;
	uint8_t sadb_alg_ivlen;
	uint16_t sadb_alg_minbits;
	uint16_t sadb_alg_maxbits;
	uint16_t sadb_alg_reserved;
};

struct sadb_spirange {
	uint16_t sadb_spirange_len;
	uint16_t sadb_spirange_exttype;
	uint32_t sadb_spirange_min;
	uint32_t sadb_spirange_max;
	uint32_t sadb_spirange_reserved;
};

struct sadb_protocol {
	uint16_t sadb_protocol_len;
	uint16_t sadb_protocol_exttype;
	uint8_t  sadb_protocol_proto;
	uint8_t  sadb_protocol_direction;
	uint8_t  sadb_protocol_flags;
	uint8_t  sadb_protocol_reserved2;
};

struct sadb_x_policy {
	uint16_t  sadb_x_policy_len;
	uint16_t  sadb_x_policy_exttype;
	u_int32_t sadb_x_policy_seq;
};

struct sadb_x_cred {
	uint16_t sadb_x_cred_len;
	uint16_t sadb_x_cred_exttype;
	uint16_t sadb_x_cred_type;
	uint16_t sadb_x_cred_reserved;
};

struct sadb_x_udpencap {
	uint16_t sadb_x_udpencap_len;
	uint16_t sadb_x_udpencap_exttype;
	uint16_t sadb_x_udpencap_port;
	uint16_t sadb_x_udpencap_reserved;
};

#ifdef _KERNEL
#define SADB_X_GETSPROTO(x) \
	( (x) == SADB_SATYPE_AH ? IPPROTO_AH :\
	(x) == SADB_SATYPE_ESP ? IPPROTO_ESP :\
	(x) == SADB_X_SATYPE_TCPSIGNATURE ? IPPROTO_TCP :\
	(x) == SADB_X_SATYPE_IPCOMP ? IPPROTO_IPCOMP: IPPROTO_IPIP )
#endif

#define SADB_EXT_RESERVED             0
#define SADB_EXT_SA                   1
#define SADB_EXT_LIFETIME_CURRENT     2
#define SADB_EXT_LIFETIME_HARD        3
#define SADB_EXT_LIFETIME_SOFT        4
#define SADB_EXT_ADDRESS_SRC          5
#define SADB_EXT_ADDRESS_DST          6
#define SADB_EXT_ADDRESS_PROXY        7
#define SADB_EXT_KEY_AUTH             8
#define SADB_EXT_KEY_ENCRYPT          9
#define SADB_EXT_IDENTITY_SRC         10
#define SADB_EXT_IDENTITY_DST         11
#define SADB_EXT_SENSITIVITY          12
#define SADB_EXT_PROPOSAL             13
#define SADB_EXT_SUPPORTED_AUTH	      14
#define SADB_EXT_SUPPORTED_ENCRYPT    15
#define SADB_EXT_SPIRANGE             16
#define SADB_X_EXT_SRC_MASK           17
#define SADB_X_EXT_DST_MASK           18
#define SADB_X_EXT_PROTOCOL           19
#define SADB_X_EXT_FLOW_TYPE          20
#define SADB_X_EXT_SRC_FLOW           21
#define SADB_X_EXT_DST_FLOW           22
#define SADB_X_EXT_SA2                23
#define SADB_X_EXT_DST2               24
#define SADB_X_EXT_POLICY             25
#define SADB_X_EXT_LOCAL_CREDENTIALS  26
#define SADB_X_EXT_REMOTE_CREDENTIALS 27
#define SADB_X_EXT_LOCAL_AUTH         28
#define SADB_X_EXT_REMOTE_AUTH        29
#define SADB_X_EXT_SUPPORTED_COMP     30
#define SADB_X_EXT_UDPENCAP           31
#define SADB_EXT_MAX                  31

/* Fix pfkeyv2.c struct pfkeyv2_socket if SATYPE_MAX > 31 */
#define SADB_SATYPE_UNSPEC		 0
#define SADB_SATYPE_AH			 1
#define SADB_SATYPE_ESP			 2
#define SADB_SATYPE_RSVP		 3
#define SADB_SATYPE_OSPFV2		 4
#define SADB_SATYPE_RIPV2		 5
#define SADB_SATYPE_MIP			 6
#define SADB_X_SATYPE_IPIP		 7
#define SADB_X_SATYPE_TCPSIGNATURE	 8
#define SADB_X_SATYPE_IPCOMP		 9
#define SADB_SATYPE_MAX			 9

#define SADB_SASTATE_LARVAL   0
#define SADB_SASTATE_MATURE   1
#define SADB_SASTATE_DYING    2
#define SADB_SASTATE_DEAD     3
#define SADB_SASTATE_MAX      3

#define SADB_AALG_NONE               0
#define SADB_AALG_MD5HMAC            2
#define SADB_AALG_SHA1HMAC           3
#define SADB_X_AALG_DES              4
#define SADB_X_AALG_SHA2_256         5
#define SADB_X_AALG_SHA2_384         6
#define SADB_X_AALG_SHA2_512         7
#define SADB_X_AALG_RIPEMD160HMAC    8
#define SADB_X_AALG_MD5              249
#define SADB_X_AALG_SHA1             250
#define SADB_AALG_MAX                250

#define SADB_EALG_NONE        0
#define SADB_X_EALG_DES_IV64  1
#define SADB_EALG_DESCBC      2
#define SADB_EALG_3DESCBC     3
#define SADB_X_EALG_RC5       4
#define SADB_X_EALG_IDEA      5
#define SADB_X_EALG_CAST      6
#define SADB_X_EALG_BLF       7
#define SADB_X_EALG_3IDEA     8
#define SADB_X_EALG_DES_IV32  9
#define SADB_X_EALG_RC4       10
#define SADB_EALG_NULL        11
#define SADB_X_EALG_AES       12
#define SADB_X_EALG_SKIPJACK  249
#define SADB_EALG_MAX         249

#define SADB_X_CALG_NONE	0
#define SADB_X_CALG_OUI		1
#define SADB_X_CALG_DEFLATE	2
#define SADB_X_CALG_LZS		3
#define SADB_X_CALG_MAX		3

#define SADB_SAFLAGS_PFS         	0x001    /* perfect forward secrecy */
#define SADB_X_SAFLAGS_HALFIV    	0x002    /* Used for ESP-old */
#define SADB_X_SAFLAGS_TUNNEL	 	0x004    /* Force tunneling */
#define SADB_X_SAFLAGS_CHAINDEL  	0x008    /* Delete whole SA chain */
#define SADB_X_SAFLAGS_RANDOMPADDING    0x080    /* Random ESP padding */
#define SADB_X_SAFLAGS_NOREPLAY         0x100    /* No replay counter */
#define SADB_X_SAFLAGS_UDPENCAP         0x200    /* ESP in UDP  */

#define SADB_X_POLICYFLAGS_POLICY       0x0001	/* This is a static policy */

#define SADB_IDENTTYPE_RESERVED     0
#define SADB_IDENTTYPE_PREFIX       1
#define SADB_IDENTTYPE_FQDN         2
#define SADB_IDENTTYPE_USERFQDN     3
#define SADB_X_IDENTTYPE_CONNECTION 4
#define SADB_IDENTTYPE_MAX          4

#define SADB_KEY_FLAGS_MAX 0

#ifdef _KERNEL
#define PFKEYV2_LIFETIME_HARD      0
#define PFKEYV2_LIFETIME_SOFT      1
#define PFKEYV2_LIFETIME_CURRENT   2

#define PFKEYV2_IDENTITY_SRC       0
#define PFKEYV2_IDENTITY_DST       1

#define PFKEYV2_ENCRYPTION_KEY     0
#define PFKEYV2_AUTHENTICATION_KEY 1

#define PFKEYV2_SOCKETFLAGS_REGISTERED 1
#define PFKEYV2_SOCKETFLAGS_PROMISC    2

#define PFKEYV2_SENDMESSAGE_UNICAST    1
#define PFKEYV2_SENDMESSAGE_REGISTERED 2
#define PFKEYV2_SENDMESSAGE_BROADCAST  3
#endif /* _KERNEL */

#define SADB_X_CREDTYPE_NONE         0
#define SADB_X_CREDTYPE_X509         1   /* ASN1 encoding of the certificate */
#define SADB_X_CREDTYPE_KEYNOTE      2   /* NUL-terminated buffer */
#define SADB_X_CREDTYPE_MAX          3

#ifdef _KERNEL
#define PFKEYV2_AUTH_LOCAL           0
#define PFKEYV2_AUTH_REMOTE          1

#define PFKEYV2_CRED_LOCAL           0
#define PFKEYV2_CRED_REMOTE          1
#endif /* _KERNEL */

#define SADB_X_AUTHTYPE_NONE         0
#define SADB_X_AUTHTYPE_PASSPHRASE   1
#define SADB_X_AUTHTYPE_RSA          2
#define SADB_X_AUTHTYPE_MAX          2

#define SADB_X_FLOW_TYPE_USE           1
#define SADB_X_FLOW_TYPE_ACQUIRE       2
#define SADB_X_FLOW_TYPE_REQUIRE       3
#define SADB_X_FLOW_TYPE_BYPASS        4
#define SADB_X_FLOW_TYPE_DENY          5
#define SADB_X_FLOW_TYPE_DONTACQ       6

#ifdef _KERNEL
struct tdb;
struct socket;
struct mbuf;

#define EXTLEN(x) (((struct sadb_ext *)(x))->sadb_ext_len * sizeof(uint64_t))
#define PADUP(x) (((x) + sizeof(uint64_t) - 1) & ~(sizeof(uint64_t) - 1))

struct pfkey_version
{
	int protocol;
	int (*create)(struct socket *socket);
	int (*release)(struct socket *socket);
	int (*send)(struct socket *socket, void *message, int len);
};

struct pfkeyv2_socket
{
	struct pfkeyv2_socket *next;
	struct socket *socket;
	int flags;
	uint32_t pid;
	uint32_t registration;    /* Increase size if SATYPE_MAX > 31 */
};

struct dump_state
{
	struct sadb_msg *sadb_msg;
	struct socket *socket;
};

int pfkeyv2_init(void);
int pfkeyv2_cleanup(void);
int pfkeyv2_parsemessage(void *, int, void **);
int pfkeyv2_expire(struct tdb *, u_int16_t);
int pfkeyv2_acquire(struct ipsec_policy *, union sockaddr_union *,
    union sockaddr_union *, u_int32_t *, struct sockaddr_encap *);

int pfkey_register(struct pfkey_version *version);
int pfkey_unregister(struct pfkey_version *version);
int pfkey_sendup(struct socket *socket, struct mbuf *packet, int more);

int pfkeyv2_create(struct socket *);
int pfkeyv2_get(struct tdb *, void **, void **);
int pfkeyv2_policy(struct ipsec_acquire *, void **, void **);
int pfkeyv2_release(struct socket *);
int pfkeyv2_send(struct socket *, void *, int);
int pfkeyv2_sendmessage(void **, int, struct socket *, u_int8_t, int);
int pfkeyv2_dump_walker(struct tdb *, void *, int);
int pfkeyv2_flush_walker(struct tdb *, void *, int);
int pfkeyv2_get_proto_alg(u_int8_t, u_int8_t *, int *);

int pfdatatopacket(void *, int, struct mbuf **);

void export_address(void **, struct sockaddr *);
void export_identity(void **, struct tdb *, int);
void export_lifetime(void **, struct tdb *, int);
void export_credentials(void **, struct tdb *, int);
void export_sa(void **, struct tdb *);
void export_key(void **, struct tdb *, int);
void export_auth(void **, struct tdb *, int);
void export_udpencap(void **, struct tdb *);

void import_auth(struct tdb *, struct sadb_x_cred *, int);
void import_address(struct sockaddr *, struct sadb_address *);
void import_identity(struct tdb *, struct sadb_ident *, int);
void import_key(struct ipsecinit *, struct sadb_key *, int);
void import_lifetime(struct tdb *, struct sadb_lifetime *, int);
void import_credentials(struct tdb *, struct sadb_x_cred *, int);
void import_sa(struct tdb *, struct sadb_sa *, struct ipsecinit *);
void import_flow(struct sockaddr_encap *, struct sockaddr_encap *,
    struct sadb_address *, struct sadb_address *, struct sadb_address *,
    struct sadb_address *, struct sadb_protocol *, struct sadb_protocol *);
void import_udpencap(struct tdb *, struct sadb_x_udpencap *);
#endif /* _KERNEL */
#endif /* _NET_PFKEY_V2_H_ */
