/*
%%% copyright-nrl-98
This software is Copyright 1998 by Randall Atkinson, Ronald Lee,
Daniel McDonald, Bao Phan, and Chris Winters. All Rights Reserved. All
rights under this copyright have been assigned to the US Naval Research
Laboratory (NRL). The NRL Copyright Notice and License Agreement Version
1.1 (January 17, 1995) applies to this software.
You should have received a copy of the license with this software. If you
didn't get a copy, you may request one from <license@ipv6.nrl.navy.mil>.

*/
#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;
};

#ifdef _KERNEL
#define SADB_X_GETSPROTO(x) ( (x) == SADB_SATYPE_AH ? IPPROTO_AH :\
                                (x) == SADB_SATYPE_ESP ? IPPROTO_ESP :\
                                                         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_EXT_MAX                  29

/* 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_SATYPE_MAX			 8

#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_AALG_DES                4
#define SADB_AALG_SHA2_256           5
#define SADB_AALG_SHA2_384           6
#define SADB_AALG_SHA2_512           7
#define SADB_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_X_EALG_NULL      11
#define SADB_X_EALG_AES       12
#define SADB_X_EALG_SKIPJACK  249
#define SADB_EALG_MAX         249

#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_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 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 *);
#endif /* _KERNEL */
#endif /* _NET_PFKEY_V2_H_ */