cregit-Linux how code gets into the kernel

Release 4.7 include/linux/ptp_classify.h

Directory: include/linux
/*
 * PTP 1588 support
 *
 * This file implements a BPF that recognizes PTP event messages.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#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) { }

Contributors

PersonTokensPropCommitsCommitProp
daniel borkmanndaniel borkmann8100.00%1100.00%
Total8100.00%1100.00%

#endif #endif /* _PTP_CLASSIFY_H_ */

Overall Contributors

PersonTokensPropCommitsCommitProp
richard cochranrichard cochran11165.29%342.86%
daniel borkmanndaniel borkmann4828.24%228.57%
stefan sorensenstefan sorensen116.47%228.57%
Total170100.00%7100.00%
Directory: include/linux
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