[mirror_ubuntu-jammy-kernel.git] / include / linux / ptp_classify.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * PTP 1588 support
 *
 * This file implements a BPF that recognizes PTP event messages.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 */

#ifndef _PTP_CLASSIFY_H_
#define _PTP_CLASSIFY_H_

#include <linux/ip.h>
#include <linux/skbuff.h>

#define PTP_CLASS_NONE  0x00 /* not a PTP event message */
#define PTP_CLASS_V1    0x01 /* protocol version 1 */
#define PTP_CLASS_V2    0x02 /* protocol version 2 */
#define PTP_CLASS_VMASK 0x0f /* max protocol version is 15 */
#define PTP_CLASS_IPV4  0x10 /* event in an IPV4 UDP packet */
#define PTP_CLASS_IPV6  0x20 /* event in an IPV6 UDP packet */
#define PTP_CLASS_L2    0x40 /* event in a L2 packet */
#define PTP_CLASS_PMASK	0x70 /* mask for the packet type field */
#define PTP_CLASS_VLAN	0x80 /* event in a VLAN tagged packet */

#define PTP_CLASS_V1_IPV4 (PTP_CLASS_V1 | PTP_CLASS_IPV4)
#define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 | PTP_CLASS_IPV6) /* probably DNE */
#define PTP_CLASS_V2_IPV4 (PTP_CLASS_V2 | PTP_CLASS_IPV4)
#define PTP_CLASS_V2_IPV6 (PTP_CLASS_V2 | PTP_CLASS_IPV6)
#define PTP_CLASS_V2_L2   (PTP_CLASS_V2 | PTP_CLASS_L2)
#define PTP_CLASS_V2_VLAN (PTP_CLASS_V2 | PTP_CLASS_VLAN)
#define PTP_CLASS_L4      (PTP_CLASS_IPV4 | PTP_CLASS_IPV6)

#define PTP_EV_PORT 319
#define PTP_GEN_BIT 0x08 /* indicates general message, if set in message type */

#define OFF_PTP_SOURCE_UUID	22 /* PTPv1 only */
#define OFF_PTP_SEQUENCE_ID	30
#define OFF_PTP_CONTROL		32 /* PTPv1 only */

/* Below defines should actually be removed at some point in time. */
#define IP6_HLEN	40
#define UDP_HLEN	8
#define OFF_IHL		14
#define IPV4_HLEN(data) (((struct iphdr *)(data + OFF_IHL))->ihl << 2)

#if defined(CONFIG_NET_PTP_CLASSIFY)
/**
 * ptp_classify_raw - classify a PTP packet
 * @skb: buffer
 *
 * Runs a minimal BPF dissector to classify a network packet to
 * determine the PTP class. In case the skb does not contain any
 * PTP protocol data, PTP_CLASS_NONE will be returned, otherwise
 * PTP_CLASS_V1_IPV{4,6}, PTP_CLASS_V2_IPV{4,6} or
 * PTP_CLASS_V2_{L2,VLAN}, depending on the packet content.
 */
unsigned int ptp_classify_raw(const struct sk_buff *skb);

void __init ptp_classifier_init(void);
#else
static inline void ptp_classifier_init(void)
{
}
static inline unsigned int ptp_classify_raw(struct sk_buff *skb)
{
	return PTP_CLASS_NONE;
}
#endif
#endif /* _PTP_CLASSIFY_H_ */
Commit	Line	Data
74ba9207	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
15f0127d RC	2	/*
	3	* PTP 1588 support
	4	*
	5	* This file implements a BPF that recognizes PTP event messages.
	6	*
	7	* Copyright (C) 2010 OMICRON electronics GmbH
15f0127d RC	8	*/
	9
	10	#ifndef _PTP_CLASSIFY_H_
	11	#define _PTP_CLASSIFY_H_
	12
d94ba80e	13	#include <linux/ip.h>
408eccce	14	#include <linux/skbuff.h>
15f0127d RC	15
	16	#define PTP_CLASS_NONE 0x00 /* not a PTP event message */
	17	#define PTP_CLASS_V1 0x01 /* protocol version 1 */
	18	#define PTP_CLASS_V2 0x02 /* protocol version 2 */
	19	#define PTP_CLASS_VMASK 0x0f /* max protocol version is 15 */
	20	#define PTP_CLASS_IPV4 0x10 /* event in an IPV4 UDP packet */
	21	#define PTP_CLASS_IPV6 0x20 /* event in an IPV6 UDP packet */
5f94c943 SS	22	#define PTP_CLASS_L2 0x40 /* event in a L2 packet */
	23	#define PTP_CLASS_PMASK 0x70 /* mask for the packet type field */
	24	#define PTP_CLASS_VLAN 0x80 /* event in a VLAN tagged packet */
15f0127d RC	25
15f0127d RC	26	#define PTP_CLASS_V1_IPV4 (PTP_CLASS_V1 \| PTP_CLASS_IPV4)
408eccce	27	#define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 \| PTP_CLASS_IPV6) /* probably DNE */
15f0127d RC	28	#define PTP_CLASS_V2_IPV4 (PTP_CLASS_V2 \| PTP_CLASS_IPV4)
	29	#define PTP_CLASS_V2_IPV6 (PTP_CLASS_V2 \| PTP_CLASS_IPV6)
	30	#define PTP_CLASS_V2_L2 (PTP_CLASS_V2 \| PTP_CLASS_L2)
	31	#define PTP_CLASS_V2_VLAN (PTP_CLASS_V2 \| PTP_CLASS_VLAN)
5f94c943	32	#define PTP_CLASS_L4 (PTP_CLASS_IPV4 \| PTP_CLASS_IPV6)
15f0127d RC	33
15f0127d RC	34	#define PTP_EV_PORT 319
f75159e9	35	#define PTP_GEN_BIT 0x08 /* indicates general message, if set in message type */
15f0127d	36
d94ba80e RC	37	#define OFF_PTP_SOURCE_UUID 22 /* PTPv1 only */
	38	#define OFF_PTP_SEQUENCE_ID 30
	39	#define OFF_PTP_CONTROL 32 /* PTPv1 only */
	40
408eccce	41	/* Below defines should actually be removed at some point in time. */
15f0127d RC	42	#define IP6_HLEN 40
15f0127d RC	43	#define UDP_HLEN 8
408eccce	44	#define OFF_IHL 14
408eccce	45	#define IPV4_HLEN(data) (((struct iphdr *)(data + OFF_IHL))->ihl << 2)
15f0127d	46
408eccce DB	47	#if defined(CONFIG_NET_PTP_CLASSIFY)
	48	/**
	49	* ptp_classify_raw - classify a PTP packet
	50	* @skb: buffer
	51	*
	52	* Runs a minimal BPF dissector to classify a network packet to
	53	* determine the PTP class. In case the skb does not contain any
	54	* PTP protocol data, PTP_CLASS_NONE will be returned, otherwise
	55	* PTP_CLASS_V1_IPV{4,6}, PTP_CLASS_V2_IPV{4,6} or
	56	* PTP_CLASS_V2_{L2,VLAN}, depending on the packet content.
	57	*/
164d8c66 DB	58	unsigned int ptp_classify_raw(const struct sk_buff *skb);
164d8c66 DB	59
408eccce DB	60	void __init ptp_classifier_init(void);
	61	#else
	62	static inline void ptp_classifier_init(void)
	63	{
	64	}
052fddfb AL	65	static inline unsigned int ptp_classify_raw(struct sk_buff *skb)
	66	{
	67	return PTP_CLASS_NONE;
	68	}
15f0127d	69	#endif
408eccce	70	#endif /* _PTP_CLASSIFY_H_ */