netdev - [PATCH v3 net-next 0/1] Bareudp Device Support

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Message-Id: <cover.1573872856.git.martin.varghese@nokia.com>
Date:   Sat, 16 Nov 2019 11:20:04 +0530
From:   Martin Varghese <martinvarghesenokia@...il.com>
To:     netdev@...r.kernel.org, stephen@...workplumber.org,
        scott.drennan@...ia.com, jbenc@...hat.com,
        martin.varghese@...ia.com
Subject: [PATCH v3 net-next 0/1] Bareudp Device Support

From: Martin Varghese <martin.varghese@...ia.com>

The Bareudp tunnel module provides a generic L3 encapsulation tunnelling
support for tunnelling different L3 protocols like MPLS, IP, NSH etc. inside
a UDP tunnel.

Special Handling
----------------
The bareudp device supports special handling for MPLS & IP as they can have
multiple ethertypes.
MPLS procotcol can have ethertypes 0x8847 (unicast) & 0x8848 (multicast).
IP proctocol can have ethertypes 0x0800 (v4) & 0x86dd (v6).
This special handling can be enabled only for ethertype 0x0800 & 0x8847 with a
flag called extended mode.

Usage
------

1. Device creation & deletion

a. ip link add dev bareudp0 type bareudp dstport 6635 ethertype 0x8847

This creates a bareudp tunnel device which tunnels L3 traffic with ethertype
0x8847 (MPLS traffic). The destination port of the UDP header will be set to 6635
The device will listen on UDP port 6635 to receive traffic.

b. ip link delete bareudp0

2. Device creation with extended mode enabled

There are two ways to create a bareudp device for MPLS & IP with extended mode
enabled.

a. ip link add dev  bareudp0 type bareudp dstport 6635 ethertype 0x8847 extmode 1

b. ip link add dev  bareudp0 type bareudp dstport 6635 ethertype mpls

Martin Varghese (1):
  Bareudp device support

 include/uapi/linux/if_link.h |  12 ++++
 ip/Makefile                  |   2 +-
 ip/iplink.c                  |   2 +-
 ip/iplink_bareudp.c          | 157 +++++++++++++++++++++++++++++++++++++++++++
 man/man8/ip-link.8.in        |  38 +++++++++++
 5 files changed, 209 insertions(+), 2 deletions(-)
 create mode 100644 ip/iplink_bareudp.c

-- 
1.8.3.1