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gerrit-public.fairphone.software / kernel / msm-4.9 / 2bff6a508eb2ba8b341c20db3099e050e5496e3d / . / net / l2tp / Kconfig
blob: 147a8fd47a17610dd392a49acee6aaf292c1b5d8 [file] [log] [blame]
James Chapmanfd558d12010-04-02 06:18:33 +0000[diff] [blame]1#
2# Layer Two Tunneling Protocol (L2TP)
3#
4
5menuconfig L2TP
6 tristate "Layer Two Tunneling Protocol (L2TP)"
Amerigo Wangfc181622012-09-20 20:36:06 +0000[diff] [blame]7 depends on (IPV6 || IPV6=n)
James Chapmanfd558d12010-04-02 06:18:33 +0000[diff] [blame]8 depends on INET
9 ---help---
10 Layer Two Tunneling Protocol
11
12 From RFC 2661 <http://www.ietf.org/rfc/rfc2661.txt>.
13
14 L2TP facilitates the tunneling of packets across an
15 intervening network in a way that is as transparent as
16 possible to both end-users and applications.
17
18 L2TP is often used to tunnel PPP traffic over IP
19 tunnels. One IP tunnel may carry thousands of individual PPP
20 connections. L2TP is also used as a VPN protocol, popular
21 with home workers to connect to their offices.
22
James Chapmanf7faffa2010-04-02 06:18:49 +0000[diff] [blame]23 L2TPv3 allows other protocols as well as PPP to be carried
24 over L2TP tunnels. L2TPv3 is defined in RFC 3931
25 <http://www.ietf.org/rfc/rfc3931.txt>.
26
James Chapmanfd558d12010-04-02 06:18:33 +0000[diff] [blame]27 The kernel component handles only L2TP data packets: a
28 userland daemon handles L2TP the control protocol (tunnel
29 and session setup). One such daemon is OpenL2TP
30 (http://openl2tp.org/).
31
32 If you don't need L2TP, say N. To compile all L2TP code as
33 modules, choose M here.
James Chapmanf7faffa2010-04-02 06:18:49 +0000[diff] [blame]34
James Chapman0ad66142010-04-02 06:19:33 +0000[diff] [blame]35config L2TP_DEBUGFS
36 tristate "L2TP debugfs support"
37 depends on L2TP && DEBUG_FS
38 help
39 Support for l2tp directory in debugfs filesystem. This may be
40 used to dump internal state of the l2tp drivers for problem
41 analysis.
42
43 If unsure, say 'Y'.
44
45 To compile this driver as a module, choose M here. The module
46 will be called l2tp_debugfs.
47
James Chapmanf7faffa2010-04-02 06:18:49 +0000[diff] [blame]48config L2TP_V3
49 bool "L2TPv3 support (EXPERIMENTAL)"
50 depends on EXPERIMENTAL && L2TP
51 help
52 Layer Two Tunneling Protocol Version 3
53
54 From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>.
55
56 The Layer Two Tunneling Protocol (L2TP) provides a dynamic
57 mechanism for tunneling Layer 2 (L2) "circuits" across a
58 packet-oriented data network (e.g., over IP). L2TP, as
59 originally defined in RFC 2661, is a standard method for
60 tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions.
61 L2TP has since been adopted for tunneling a number of other
62 L2 protocols, including ATM, Frame Relay, HDLC and even raw
63 ethernet frames.
64
65 If you are connecting to L2TPv3 equipment, or you want to
66 tunnel raw ethernet frames using L2TP, say Y here. If
67 unsure, say N.
James Chapman0d767512010-04-02 06:19:00 +0000[diff] [blame]68
69config L2TP_IP
70 tristate "L2TP IP encapsulation for L2TPv3"
71 depends on L2TP_V3
72 help
73 Support for L2TP-over-IP socket family.
74
75 The L2TPv3 protocol defines two possible encapsulations for
76 L2TP frames, namely UDP and plain IP (without UDP). This
77 driver provides a new L2TPIP socket family with which
78 userspace L2TPv3 daemons may create L2TP/IP tunnel sockets
79 when UDP encapsulation is not required. When L2TP is carried
80 in IP packets, it used IP protocol number 115, so this port
81 must be enabled in firewalls.
82
83 To compile this driver as a module, choose M here. The module
84 will be called l2tp_ip.
James Chapmand9e31d12010-04-02 06:19:26 +0000[diff] [blame]85
86config L2TP_ETH
87 tristate "L2TP ethernet pseudowire support for L2TPv3"
88 depends on L2TP_V3
89 help
90 Support for carrying raw ethernet frames over L2TPv3.
91
92 From RFC 4719 <http://www.ietf.org/rfc/rfc4719.txt>.
93
94 The Layer 2 Tunneling Protocol, Version 3 (L2TPv3) can be
95 used as a control protocol and for data encapsulation to set
96 up Pseudowires for transporting layer 2 Packet Data Units
97 across an IP network [RFC3931].
98
99 This driver provides an ethernet virtual interface for each
100 L2TP ethernet pseudowire instance. Standard Linux tools may
101 be used to assign an IP address to the local virtual
102 interface, or add the interface to a bridge.
103
104 If you are using L2TPv3, you will almost certainly want to
105 enable this option.
106
107 To compile this driver as a module, choose M here. The module
108 will be called l2tp_eth.