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Commit e3e4712e authored by Roopa Prabhu's avatar Roopa Prabhu Committed by David S. Miller
Browse files

mpls: ip tunnel support 



This implementation uses lwtunnel infrastructure to register
hooks for mpls tunnel encaps.

It picks cues from iptunnel_encaps infrastructure and previous
mpls iptunnel RFC patches from Eric W. Biederman and Robert Shearman

Signed-off-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent face0188

include/linux/mpls_iptunnel.h

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#ifndef _LINUX_MPLS_IPTUNNEL_H

#define _LINUX_MPLS_IPTUNNEL_H



#include <uapi/linux/mpls_iptunnel.h>



#endif  /* _LINUX_MPLS_IPTUNNEL_H */

include/net/mpls_iptunnel.h

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/*

 * Copyright (c) 2015 Cumulus Networks, Inc.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of version 2 of the GNU General Public

 * License as published by the Free Software Foundation.

 *

 * 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.

 */



#ifndef _NET_MPLS_IPTUNNEL_H

#define _NET_MPLS_IPTUNNEL_H 1



#define MAX_NEW_LABELS 2



struct mpls_iptunnel_encap {

	u32	label[MAX_NEW_LABELS];

	u32	labels;

};



static inline struct mpls_iptunnel_encap *mpls_lwtunnel_encap(struct lwtunnel_state *lwtstate)

{

	return (struct mpls_iptunnel_encap *)lwtstate->data;

}



#endif

include/uapi/linux/mpls_iptunnel.h

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/*

 *	mpls tunnel api

 *

 *	Authors:

 *		Roopa Prabhu <roopa@cumulusnetworks.com>

 *

 *	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 _UAPI_LINUX_MPLS_IPTUNNEL_H

#define _UAPI_LINUX_MPLS_IPTUNNEL_H



/* MPLS tunnel attributes

 * [RTA_ENCAP] = {

 *     [MPLS_IPTUNNEL_DST]

 * }

 */

enum {

	MPLS_IPTUNNEL_UNSPEC,

	MPLS_IPTUNNEL_DST,

	__MPLS_IPTUNNEL_MAX,

};

#define MPLS_IPTUNNEL_MAX (__MPLS_IPTUNNEL_MAX - 1)



#endif /* _UAPI_LINUX_MPLS_IPTUNNEL_H */

net/mpls/Kconfig

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@@ -24,7 +24,13 @@ config NET_MPLS_GSO 


config MPLS_ROUTING

	tristate "MPLS: routing support"

	help

	---help---

	 Add support for forwarding of mpls packets.



config MPLS_IPTUNNEL

	tristate "MPLS: IP over MPLS tunnel support"

	depends on LWTUNNEL && MPLS_ROUTING

	---help---

	 mpls ip tunnel support.



endif # MPLS

net/mpls/Makefile

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@@ -3,5 +3,6 @@ 
#

obj-$(CONFIG_NET_MPLS_GSO) += mpls_gso.o

obj-$(CONFIG_MPLS_ROUTING) += mpls_router.o

obj-$(CONFIG_MPLS_IPTUNNEL) += mpls_iptunnel.o



mpls_router-y := af_mpls.o