ah.c File Reference

AH (IP Authentication Header) More...

#include "ipsec/ipsec.h"
#include "ipsec/ipsec_inbound.h"
#include "ipsec/ipsec_anti_replay.h"
#include "ipsec/ipsec_misc.h"
#include "ah/ah.h"
#include "core/tcp_fsm.h"
#include "core/raw_socket.h"
#include "ipv4/icmp.h"
#include "debug.h"

Go to the source code of this file.

Macros
#define	TRACE_LEVEL   AH_TRACE_LEVEL

Functions
error_t	ipv4ProcessAhHeader (NetInterface *interface, const Ipv4Header *ipv4Header, const NetBuffer *buffer, size_t offset, NetRxAncillary *ancillary)
	Process AH protected packet. More...
error_t	ahGenerateIcv (IpsecSadEntry *sa, const Ipv4Header *ipv4Header, AhHeader *ahHeader, const NetBuffer *buffer, size_t offset)
	ICV generation. More...
error_t	ahVerifyIcv (IpsecSadEntry *sa, const Ipv4Header *ipv4Header, const AhHeader *ahHeader, const NetBuffer *buffer, size_t offset)
	ICV verification. More...
void	ahProcessMutableIpv4Options (Ipv4Header *header)
	Zeroize mutable IPv4 options. More...
void	ahDumpHeader (const AhHeader *ahHeader)
	Dump AH header for debugging purpose. More...

Detailed Description

AH (IP Authentication Header)

License

SPDX-License-Identifier: GPL-2.0-or-later

Copyright (C) 2022-2025 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneIPSEC Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Author

Oryx Embedded SARL (www.oryx-embedded.com)

Version

2.5.4

Definition in file ah.c.

Macro Definition Documentation

TRACE_LEVEL

#define TRACE_LEVEL   AH_TRACE_LEVEL

Definition at line 32 of file ah.c.

Function Documentation

ahDumpHeader()

void ahDumpHeader

(

const AhHeader *

ahHeader

)

Dump AH header for debugging purpose.

Parameters

[in]

ahHeader

Pointer to the AH header

Definition at line 756 of file ah.c.

ahGenerateIcv()

error_t ahGenerateIcv	(	IpsecSadEntry *	sa,
		const Ipv4Header *	ipv4Header,
		AhHeader *	ahHeader,
		const NetBuffer *	buffer,
		size_t	offset
	)

ICV generation.

Parameters

[in]	sa	Pointer to the SA
[in]	ipv4Header	Pointer to the IPv4 header
[in,out]	ahHeader	Pointer to the AH header
[in]	buffer	Multi-part buffer containing the payload
[in]	offset	Offset to the first byte of the payload

Returns

Error code

Definition at line 275 of file ah.c.

ahProcessMutableIpv4Options()

void ahProcessMutableIpv4Options

(

Ipv4Header *

header

)

Zeroize mutable IPv4 options.

Parameters

[in]

header

Pointer to the IPv4 header

Definition at line 690 of file ah.c.

ahVerifyIcv()

error_t ahVerifyIcv	(	IpsecSadEntry *	sa,
		const Ipv4Header *	ipv4Header,
		const AhHeader *	ahHeader,
		const NetBuffer *	buffer,
		size_t	offset
	)

ICV verification.

Parameters

[in]	sa	Pointer to the SA
[in]	ipv4Header	Pointer to the IPv4 header
[in]	ahHeader	Pointer to the AH header
[in]	buffer	Multi-part buffer containing the payload
[in]	offset	Offset to the first byte of the payload

Returns

Error code

Definition at line 449 of file ah.c.

ipv4ProcessAhHeader()

error_t ipv4ProcessAhHeader	(	NetInterface *	interface,
		const Ipv4Header *	ipv4Header,
		const NetBuffer *	buffer,
		size_t	offset,
		NetRxAncillary *	ancillary
	)

Process AH protected packet.

Parameters

[in]	interface	Underlying network interface
[in]	ipv4Header	Pointer to the IPv4 header
[in]	buffer	Multi-part buffer containing the AH protected packet
[in]	offset	Offset to the first byte of the AH header
[in]	ancillary	Additional options passed to the stack along with the packet

Returns

Error code

Definition at line 60 of file ah.c.