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| author | James Chapman <jchapman@katalix.com> | 2010-04-02 06:19:00 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-03 14:56:04 -0700 |
| commit | 0d76751fad7739014485ba5bd388d4f1b4fd4143 (patch) | |
| tree | 25a4525bf6b2ec9f052f22ba98cdfd3ff3a86aa3 /net/l2tp/Kconfig | |
| parent | e0d4435f93905f517003cfa7328a36ea19788147 (diff) | |
| download | lwn-0d76751fad7739014485ba5bd388d4f1b4fd4143.tar.gz lwn-0d76751fad7739014485ba5bd388d4f1b4fd4143.zip | |
l2tp: Add L2TPv3 IP encapsulation (no UDP) support
This patch adds a new L2TPIP socket family and modifies the core to
handle the case where there is no UDP header in the L2TP
packet. L2TP/IP uses IP protocol 115. Since L2TP/UDP and L2TP/IP
packets differ in layout, the datapath packet handling code needs
changes too. Userspace uses an L2TPIP socket instead of a UDP socket
when IP encapsulation is required.
We can't use raw sockets for this because the semantics of raw sockets
don't lend themselves to the socket-per-tunnel model - we need to
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp/Kconfig')
| -rw-r--r-- | net/l2tp/Kconfig | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/l2tp/Kconfig b/net/l2tp/Kconfig index d60758d60478..0a11ccf2d95b 100644 --- a/net/l2tp/Kconfig +++ b/net/l2tp/Kconfig @@ -51,3 +51,20 @@ config L2TP_V3 If you are connecting to L2TPv3 equipment, or you want to tunnel raw ethernet frames using L2TP, say Y here. If unsure, say N. + +config L2TP_IP + tristate "L2TP IP encapsulation for L2TPv3" + depends on L2TP_V3 + help + Support for L2TP-over-IP socket family. + + The L2TPv3 protocol defines two possible encapsulations for + L2TP frames, namely UDP and plain IP (without UDP). This + driver provides a new L2TPIP socket family with which + userspace L2TPv3 daemons may create L2TP/IP tunnel sockets + when UDP encapsulation is not required. When L2TP is carried + in IP packets, it used IP protocol number 115, so this port + must be enabled in firewalls. + + To compile this driver as a module, choose M here. The module + will be called l2tp_ip. |