131 lines
4.9 KiB
Plaintext
131 lines
4.9 KiB
Plaintext
l2tpd version 0.60
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==================
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Copyright (C)1998 Adtran, Inc.
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Mark Spencer <markster@marko.net>
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Introduction:
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-------------
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l2tpd is an implementation of the layer two tunneling protocol. It works in
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userspace completely (although kernel work is planned after the userspace
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version is stablized). l2tpd works by opening a pseudo-tty for communicating
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with pppd. Although l2tpd was written for Linux, the current version should
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be highly portable to other UNIX's supported by pppd.
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Legal:
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------
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l2tpd is free software, distributed under the GNU General Public License (GPL)
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and you should read the LICENSE File if you are not already familiar with the
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GPL before using the product.
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If you distribute l2tpd, a modified version, or a derivative product, you
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MUST not remove Adtran's name from the product nor modify the terms of the
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copyright.
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Adtran may license l2tpd under other terms in addition to the GPL. This way,
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companies who wish to use l2tpd for embedded systems or commercial applications
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and find the GPL too restrictive can license the technology from Adtran under
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more favorable terms.
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Bugs, Patches, and Code Contribution:
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-------------------------------------
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Please send bug reports and patches to either the l2tp mailng list
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(l2tpd@marko.net) or myself (markster@marko.net).
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In order to contribute code, either with patches, or by direct access to the
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CVS tree for l2tpd, send me e-mail (markster@marko.net).
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The word "FIXME" is a place holder for code that needs to be in place, or
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checks that need to be done, but haven't been coded yet. Feel free to fix the
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fixme's and submit patches!
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Adtran requires that you not restrict the licensing of any patches or code
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contributions to the main l2tpd project (beyond the terms that are already
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there). This is to maintain our ability to distribute l2tpd as described
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above. It does not in any way affect your ability to use code that you have
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written.
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Of course, the above patch rules apply only to the "official" l2tpd product
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as distributed by Adtran. If you are unwilling to give Adtran the right to
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re-license your patches under other terms than GPL, you may create your own
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third party product which is distributed only under GPL.
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Release Notes
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-------------
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Version 0.60 should be considered ALPHA. It does NOT completely implement
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the l2tp draft specification. Work on the high-speed kernel
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implementation has already begun, but a relase date is not available.
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The primary use of this ALPHA level code is to test the ability of l2tpd
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to talk with other LAC and LNS implementations. I hope that everyone who
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tests the software will send me results on how it worked or failed to work
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for them.
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(theoretically) implemented features
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------------------------------------
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* Proper payload and control packet handling
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* Reliable control packet delivery
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* Ability to recover from payload errors
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* Ability to handle packets with/without length set
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* Ability to handle flow control or no flow control
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* Most critical AVP's for normal operation
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* Challenge authentication
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* Hidden AVP's
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* Hello's to detect outages
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* Handles sync and async packets
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* Can act as LNS
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* Can be a source of a virtual LAC call
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* Reads configuration file
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* Automated LAC dialup via config file, including redial
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* Can be configured while running via a file system pipe
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* Access Control
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* Statistics report when sent a SIGUSR1
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* ACCM
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Major unimplemented specification features
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------------------------------------------
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* Rate Adaptive Timeouts
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* Out of order packet handling
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* Initial/Final LCP states
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* Q.931 Result Codes
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* Tie Breakers
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* Minimum/Maximum BPS
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* Call Errors
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Important non-specification related features to be added
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--------------------------------------------------------
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* More configuration options if needed
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* Kernel support for *much* improved performance
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Usage notes on /var/run/l2tp-control
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------------------------------------
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There aren't any command line options to l2tpd yet.
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Upon running l2tpd, a pipe is created in /var/run/l2tp-control. Simple
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commands can then be echoed to this pipe to control l2tp on the fly. The
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commands are:
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t <host> - create a tunnel to <host>
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c <tid> or <entry> - originate an l2tp call on the tunnel
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identified locally by <tid>, or dial the entry <entry>
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h <cid> - hang up a call with the local identifier <cid>
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d <tid> or <entry> - disconnect the tunnel locally identified by <tid>
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or a lac entry <entry>
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For example, to establish a tunnel to marko.net, one might do:
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echo "t marko.net" >/var/run/l2tp-control
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l2tpd must be running for this to work.
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Various other notes
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-------------------
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The PPP options are hard coded in l2tp.h until a file format is decided upon.
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Sending a SIGUSR1 to l2tpd will cause it to dump its status.
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Mailing List
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------------
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If you would like to contribute to discussions of the architecture of l2tpd,
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file formats, etc, I encourage you to join the l2tpd mailing list by sending
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the word "subscribe" in the body of a message to "l2tpd-request@marko.net"
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