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	1	/*
	2	* Copyright (c) 2011 Apple Inc. All rights reserved.
	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	#ifndef _NET_IF_UTUN_CRYPTO_IPSEC_H_
	30	#define _NET_IF_UTUN_CRYPTO_IPSEC_H_
	31
	32	#ifdef KERNEL_PRIVATE
	33
	34	struct utun_pcb;
	35
	36	#define UTUN_CRYPTO_DIR_TO_IPSEC_DIR(dir) (dir == UTUN_CRYPTO_DIR_IN)? IPSEC_DIR_INBOUND : IPSEC_DIR_OUTBOUND
	37	#define IF_UTUN_GET_TX_CRYPTO_KEYS(pcb) LIST_FIRST(&pcb->utun_crypto_ctx[UTUN_CRYPTO_DIR_TO_IDX(UTUN_CRYPTO_DIR_OUT)].keys_listhead)
	38	#define IF_UTUN_GET_CRYPTO_KEYS_IPSEC_SAH(keys) keys->state.u.ipsec.sah
	39	#define IF_UTUN_GET_CRYPTO_KEYS_IPSEC_SAV(keys) keys->state.u.ipsec.sav
	40
	41	/*
	42	* Summary: cleans up all crypto info for the specified utun.
	43	*/
	44	void
	45	utun_cleanup_all_crypto_ipsec(struct utun_pcb *pcb);
	46
	47	/*
	48	* Summary: enables ipsec crypto info for the specified utun.
	49	*/
	50	void
	51	utun_ctl_enable_crypto_ipsec(struct utun_pcb pcb, utun_crypto_args_t args);
	52
	53	/*
	54	* Summary: disables ipsec crypto info for the specified utun.
	55	*/
	56	void
	57	utun_ctl_disable_crypto_ipsec(struct utun_pcb *pcb);
	58
	59	/*
	60	* Summary: configures an ipsec crypto context for the specified utun, with keying material
	61	* (needed for traffic encrypt/decrypt).
	62	* Args:
	63	* pcb - the specified utun state info
	64	* args - the ipsec crypto context keying arguments as passed down from userland.
	65	* crypto_ctx_mat - the ipsec crypto context's keying material to be filled.
	66	* Returns: 0 if successful, otherwise returns an appropriate errno.
	67	*/
	68	errno_t
	69	utun_ctl_config_crypto_keys_ipsec(struct utun_pcb *pcb,
	70	utun_crypto_keys_args_t *args,
	71	utun_crypto_keys_t *crypto_ctx_mat);
	72
	73	/*
	74	* Summary: unconfigures the keying material in an ipsec crypto context for the specified utun.
	75	* Args:
	76	* args - the ipsec crypto context keying arguments as passed down from userland.
	77	* crypto_ctx_mat - the ipsec crypto context's keying material to be filled.
	78	* Returns: 0 if successful, otherwise returns an appropriate errno.
	79	*/
	80	errno_t
	81	utun_ctl_unconfig_crypto_keys_ipsec(utun_crypto_keys_args_t *args,
	82	utun_crypto_keys_t *crypto_ctx_mat);
	83
	84	/*
	85	* Summary: generates an SPI/index to be using by keying material in an ipsec crypto context
	86	* for the specified utun.
	87	* Args:
	88	* args - the ipsec crypto context key index arguments as passed down from userland.
	89	* Returns: 0 if successful, otherwise returns an appropriate errno.
	90	*/
	91	errno_t
	92	utun_ctl_generate_crypto_keys_idx_ipsec(utun_crypto_keys_idx_args_t *args);
	93
	94	int
	95	utun_pkt_ipsec_output(struct utun_pcb pcb, mbuf_t pkt);
	96
	97	int
	98	utun_pkt_is_ipsec_keepalive(struct utun_pcb pcb, mbuf_t pkt, u_int16_t nxt, u_int32_t flags, size_t off);
	99
	100	int
	101	utun_pkt_ipsec_input(struct utun_pcb pcb, mbuf_t pkt, protocol_family_t family);
	102
	103	#endif // KERNEL_PRIVATE
	104
	105	#endif // _NET_IF_UTUN_CRYPTO_IPSEC_H_