linux-stable/include/uapi/linux/tc_act/tc_skbmod.h

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * Copyright (c) 2016, Jamal Hadi Salim
 *
 * 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.
*/

#ifndef __LINUX_TC_SKBMOD_H
#define __LINUX_TC_SKBMOD_H

#include <linux/pkt_cls.h>

#define TCA_ACT_SKBMOD 15

#define SKBMOD_F_DMAC	0x1
#define SKBMOD_F_SMAC	0x2
#define SKBMOD_F_ETYPE	0x4
#define SKBMOD_F_SWAPMAC 0x8

struct tc_skbmod {
	tc_gen;
	__u64 flags;
};

enum {
	TCA_SKBMOD_UNSPEC,
	TCA_SKBMOD_TM,
	TCA_SKBMOD_PARMS,
	TCA_SKBMOD_DMAC,
	TCA_SKBMOD_SMAC,
	TCA_SKBMOD_ETYPE,
	TCA_SKBMOD_PAD,
	__TCA_SKBMOD_MAX
};
#define TCA_SKBMOD_MAX (__TCA_SKBMOD_MAX - 1)

#endif
License cleanup: add SPDX license identifier to uapi header files with a license Many user space API headers have licensing information, which is either incomplete, badly formatted or just a shorthand for referring to the license under which the file is supposed to be. This makes it hard for compliance tools to determine the correct license. Update these files with an SPDX license identifier. The identifier was chosen based on the license information in the file. GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license identifier with the added 'WITH Linux-syscall-note' exception, which is the officially assigned exception identifier for the kernel syscall exception: NOTE! This copyright does not cover user programs that use kernel services by normal system calls - this is merely considered normal use of the kernel, and does not fall under the heading of "derived work". This exception makes it possible to include GPL headers into non GPL code, without confusing license compliance tools. Headers which have either explicit dual licensing or are just licensed under a non GPL license are updated with the corresponding SPDX identifier and the GPLv2 with syscall exception identifier. The format is: ((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE) SPDX license identifiers are a legally binding shorthand, which can be used instead of the full boiler plate text. The update does not remove existing license information as this has to be done on a case by case basis and the copyright holders might have to be consulted. This will happen in a separate step. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. See the previous patch in this series for the methodology of how this patch was researched. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2017-11-01 14:09:13 +00:00			`/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */`
net_sched: Introduce skbmod action This action is intended to be an upgrade from a usability perspective from pedit (as well as operational debugability). Compare this: sudo tc filter add dev $ETH parent 1: protocol ip prio 10 \ u32 match ip protocol 1 0xff flowid 1:2 \ action pedit munge offset -14 u8 set 0x02 \ munge offset -13 u8 set 0x15 \ munge offset -12 u8 set 0x15 \ munge offset -11 u8 set 0x15 \ munge offset -10 u16 set 0x1515 \ pipe to: sudo tc filter add dev $ETH parent 1: protocol ip prio 10 \ u32 match ip protocol 1 0xff flowid 1:2 \ action skbmod dmac 02:15:15:15:15:15 Also try to do a MAC address swap with pedit or worse try to debug a policy with destination mac, source mac and etherype. Then make few rules out of those and you'll get my point. In the future common use cases on pedit can be migrated to this action (as an example different fields in ip v4/6, transports like tcp/udp/sctp etc). For this first cut, this allows modifying basic ethernet header. The most important ethernet use case at the moment is when redirecting or mirroring packets to a remote machine. The dst mac address needs a re-write so that it doesnt get dropped or confuse an interconnecting (learning) switch or dropped by a target machine (which looks at the dst mac). And at times when flipping back the packet a swap of the MAC addresses is needed. Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2016-09-13 00:13:09 +00:00			`/*`
			`* Copyright (c) 2016, Jamal Hadi Salim`
			`*`
			`* 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.`
			`*/`

			`#ifndef __LINUX_TC_SKBMOD_H`
			`#define __LINUX_TC_SKBMOD_H`

			`#include <linux/pkt_cls.h>`

			`#define TCA_ACT_SKBMOD 15`

			`#define SKBMOD_F_DMAC 0x1`
			`#define SKBMOD_F_SMAC 0x2`
			`#define SKBMOD_F_ETYPE 0x4`
			`#define SKBMOD_F_SWAPMAC 0x8`

			`struct tc_skbmod {`
			`tc_gen;`
			`__u64 flags;`
			`};`

			`enum {`
			`TCA_SKBMOD_UNSPEC,`
			`TCA_SKBMOD_TM,`
			`TCA_SKBMOD_PARMS,`
			`TCA_SKBMOD_DMAC,`
			`TCA_SKBMOD_SMAC,`
			`TCA_SKBMOD_ETYPE,`
			`TCA_SKBMOD_PAD,`
			`__TCA_SKBMOD_MAX`
			`};`
			`#define TCA_SKBMOD_MAX (__TCA_SKBMOD_MAX - 1)`

			`#endif`