Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f7faffa3 authored by James Chapman's avatar James Chapman Committed by David S. Miller
Browse files

l2tp: Add L2TPv3 protocol support 



The L2TPv3 protocol changes the layout of the L2TP packet
header. Tunnel and session ids change from 16-bit to 32-bit values,
data sequence numbers change from 16-bit to 24-bit values and PPP-specific
fields are moved into protocol-specific subheaders.

Although this patch introduces L2TPv3 protocol support, there are no
userspace interfaces to create L2TPv3 sessions yet.

Signed-off-by: default avatarJames Chapman <jchapman@katalix.com>
Reviewed-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9345471b

net/l2tp/Kconfig

+25 −0
Original line number Diff line number Diff line
@@ -19,6 +19,10 @@ menuconfig L2TP 
	  connections. L2TP is also used as a VPN protocol, popular

	  with home workers to connect to their offices.



	  L2TPv3 allows other protocols as well as PPP to be carried

	  over L2TP tunnels. L2TPv3 is defined in RFC 3931

	  <http://www.ietf.org/rfc/rfc3931.txt>.



	  The kernel component handles only L2TP data packets: a

	  userland daemon handles L2TP the control protocol (tunnel

	  and session setup). One such daemon is OpenL2TP
@@ -26,3 +30,24 @@ menuconfig L2TP 


	  If you don't need L2TP, say N. To compile all L2TP code as

	  modules, choose M here.



config L2TP_V3

	bool "L2TPv3 support (EXPERIMENTAL)"

	depends on EXPERIMENTAL && L2TP

	help

	  Layer Two Tunneling Protocol Version 3



	  From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>.



	  The Layer Two Tunneling Protocol (L2TP) provides a dynamic

	  mechanism for tunneling Layer 2 (L2) "circuits" across a

	  packet-oriented data network (e.g., over IP).  L2TP, as

	  originally defined in RFC 2661, is a standard method for

	  tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions.

	  L2TP has since been adopted for tunneling a number of other

	  L2 protocols, including ATM, Frame Relay, HDLC and even raw

	  ethernet frames.



	  If you are connecting to L2TPv3 equipment, or you want to

	  tunnel raw ethernet frames using L2TP, say Y here. If

	  unsure, say N.

net/l2tp/l2tp_core.c

+397 −135

File changed.

Preview size limit exceeded, changes collapsed.

net/l2tp/l2tp_core.h

+46 −8

File changed.

Preview size limit exceeded, changes collapsed.

net/l2tp/l2tp_ppp.c

+16 −5

File changed.

Preview size limit exceeded, changes collapsed.