freebsd-dev/sys/net/if_enc.h

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2008 The FreeBSD 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD$
 */

#ifndef _NET_IF_ENC_H
#define _NET_IF_ENC_H

struct ipsec_ctx_data {
	struct mbuf	**mp;
	struct secasvar	*sav;
	struct inpcb	*inp;
	uint8_t		af;
#define	IPSEC_ENC_BEFORE	0x01
#define	IPSEC_ENC_AFTER		0x02
	uint8_t		enc;
};

#endif /* _NET_IF_ENC_H */
Increase statistic counters for enc0 interface when enabled and processing IPSec traffic. Approved by: gnn (mentor) MFC after: 1 week 2008-08-12 09:05:01 +00:00			`/*-`
sys: general adoption of SPDX licensing ID tags. Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended. 2017-11-27 15:23:17 +00:00			`* SPDX-License-Identifier: BSD-2-Clause-FreeBSD`
			`*`
Increase statistic counters for enc0 interface when enabled and processing IPSec traffic. Approved by: gnn (mentor) MFC after: 1 week 2008-08-12 09:05:01 +00:00			`* Copyright (c) 2008 The FreeBSD 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.`
			`*`
			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.`
			`*`
			`* $FreeBSD$`
			`*/`

			`#ifndef _NET_IF_ENC_H`
			`#define _NET_IF_ENC_H`

Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4). 2015-11-25 07:31:59 +00:00			`struct ipsec_ctx_data {`
			`struct mbuf **mp;`
			`struct secasvar *sav;`
Add inpcb pointer to struct ipsec_ctx_data and pass it to the pfil hook from enc_hhook(). This should solve the problem when pf is used with if_enc(4) interface, and outbound packet with existing PCB checked by pf, and this leads to deadlock due to pf does its own PCB lookup and tries to take rlock when wlock is already held. Now we pass PCB pointer if it is known to the pfil hook, this helps to avoid extra PCB lookup and thus rlock acquiring is not needed. For inbound packets it is safe to pass NULL, because we do not held any PCB locks yet. PR: 220217 MFC after: 3 weeks Sponsored by: Yandex LLC 2017-07-31 11:04:35 +00:00			`struct inpcb *inp;`
Overhaul if_enc(4) and make it loadable in run-time. Use hhook(9) framework to achieve ability of loading and unloading if_enc(4) kernel module. INET and INET6 code on initialization registers two helper hooks points in the kernel. if_enc(4) module uses these helper hook points and registers its hooks. IPSEC code uses these hhook points to call helper hooks implemented in if_enc(4). 2015-11-25 07:31:59 +00:00			`uint8_t af;`
			`#define IPSEC_ENC_BEFORE 0x01`
			`#define IPSEC_ENC_AFTER 0x02`
			`uint8_t enc;`
			`};`
Increase statistic counters for enc0 interface when enabled and processing IPSec traffic. Approved by: gnn (mentor) MFC after: 1 week 2008-08-12 09:05:01 +00:00
			`#endif /* _NET_IF_ENC_H */`