secnet - flexible VPN software
+* Copying
+
+secnet is Copyright (C) 1995--2001 Stephen Early <steve@greenend.org.uk>
+It is distributed under the terms of the GNU General Public License,
+version 2 or later. See the file COPYING for more information.
+
+The portable snprintf implementation in snprintf.c is Copyright (C)
+1999 Mark Martinec <mark.martinec@ijs.si> and is distributed under the
+terms of the Frontier Artistic License. You can find the standard
+version of snprintf.c at http://www.ijs.si/software/snprintf/
+
+The IP address handling library in ipaddr.py is Copyright (C)
+1996--2000 Cendio Systems AB, and is distributed under the terms of
+the GPL.
+
* Introduction
secnet allows large virtual private networks to be constructed
laptop-to-host link), read the section in this file on 'Creating a
VPN'.
+* Mailing lists and bug reporting
+
+There are two mailing lists associated with secnet: an 'announce' list
+and a 'discuss' list. Their addresses are:
+http://www.chiark.greenend.org.uk/mailman/listinfo/secnet-announce
+http://www.chiark.greenend.org.uk/mailman/listinfo/secnet-discuss
+
+The -announce list receives one message per secnet release. The
+-discuss list is for general discussion, including help with
+configuration, bug reports, feature requests, etc.
+
+Bug reports should be sent to <steve@greenend.org.uk>; they will be
+forwarded to the -discuss list by me.
+
* Creating a VPN
XXX TODO
Note that f/g/e is NOT 4.
-In a future version of secnet it will also be permissible to list
-other dictionaries before a dictionary definition,
-eg. <defaults,otherdefaults>{definitions}. These will be searched in
-order for keys, before the lexical parent. (This is not yet
-implemented)
-
Elements that are lists are inserted into lists in definitions, not
referenced by them (i.e. you can't have lists of lists).
The main body of secnet, and all the additional modules, predefine
some keys in the root dictionary. The main ones are:
- yes, true, True, TRUE: the boolean value True
- no, false, False, FALSE: the boolean value False
+ yes, true, True, TRUE, on: the boolean value True
+ no, false, False, FALSE, off: the boolean value False
makelist: turns a dictionary (arg1) into a list of definitions
(ignoring the keys)
readfile: reads a file (arg1) and returns it as a string
* secnet command line options
-XXX TODO
+Usage: secnet [OPTION]...
+
+ -f, --silent, --quiet suppress error messages
+ -w, --nowarnings suppress warnings
+ -v, --verbose output extra diagnostics
+ -c, --config=filename specify a configuration file
+ -j, --just-check-config stop after reading configfile
+ -n, --nodetach do not run in background
+ -d, --debug=item,... set debug options
+ --help display this help and exit
+ --version output version information and exit
* secnet builtin modules
buffer (buffer closure): buffer for incoming packets
authbind (string): optional, path to authbind-helper program
-** util
+** log
Defines:
logfile (closure => log closure)
syslog (closure => log closure)
- sysbuffer (closure => buffer closure)
logfile: dict argument
filename (string): where to log to
{ "verbose", M_INFO|M_NOTICE|M_WARNING|M_ERROR|M_SECURITY|M_FATAL },
{ "quiet", M_FATAL }
+logfile will close and reopen its file upon receipt of SIGHUP.
+
syslog: dict argument
ident (string): include this string in every log message
facility (string): facility to log as
{ "user", LOG_USER },
{ "uucp", LOG_UUCP }
+** util
+
+Defines:
+ sysbuffer (closure => buffer closure)
+
sysbuffer: integer[,dict]
arg1: buffer length
arg2: options:
site: dict argument
local-name (string): this site's name for itself
name (string): the name of the site's peer
- netlink (netlink closure)
+ link (netlink closure)
comm (comm closure)
resolver (resolver closure)
random (randomsrc closure)
address (string): optional, DNS name used to find our peer
port (integer): mandatory if 'address' is specified: the port used
to contact our peer
- networks (string list): networks that our peer may claim traffic for
key (rsapubkey closure): our peer's public key
transform (transform closure): how to mangle packets sent between sites
dh (dh closure)
dump-packets: every key setup packet we see
errors: failure of name resolution, internal errors
all: everything (too much!)
- netlink-options (string list): options to pass to netlink device when
- registering remote networks
- soft: create 'soft' routes that go away when there's no key established
- with the peer
- allow-route: allow packets from our peer to be sent down other tunnels,
- as well as to the host
** transform
** netlink
Defines:
- null-netlink (closure => netlink closure)
+ null-netlink (closure => closure or netlink closure)
null-netlink: dict argument
name (string): name for netlink device, used in log messages
by any remote site using this netlink device
local-address (string): IP address of host's tunnel interface
secnet-address (string): IP address of this netlink device
+ ptp-address (string): IP address of the other end of a point-to-point link
mtu (integer): MTU of host's tunnel interface
+Only one of secnet-address or ptp-address may be specified. If
+point-to-point mode is in use then the "routes" option must also be
+specified, and netlink returns a netlink closure that should be used
+directly with the "link" option to the site closure. If
+point-to-point mode is not in use then netlink returns a closure that
+may be invoked using a dict argument with the following keys to yield
+a netlink closure:
+ routes (string list): networks reachable down the tunnel attached to
+ this instance of netlink
+ options (string list):
+ allow-route: allow packets coming from this tunnel to be routed to
+ other tunnels as well as the host (used for mobile devices like laptops)
+ soft-route: remove these routes from the host's routing table when
+ the tunnel link quality is zero
+ mtu (integer): default MTU over this link; may be updated by tunnel code
+
+Netlink will dump its current routing table to the system/log on
+receipt of SIGUSR1.
+
** slip
Defines:
tun-old (closure => netlink closure)
tun: dict argument
+ flavour (string): optional, type of TUN interface to use
+ ("guess","linux","bsd","streams")
device (string): optional, path of TUN/TAP device file ["/dev/net/tun"]
interface (string): optional, name of tunnel network interface
ifconfig-path (string): optional, path to ifconfig command
route-path (string): optional, path to route command
+ ifconfig-type (string): optional, how to perform ifconfig
+ route-type (string): optional, how to add and remove routes
+ types are: "guess", "ioctl", "bsd", "linux", "solaris-2.5"
buffer (buffer closure): buffer for host->secnet packets
plus generic netlink options, as for 'null-netlink'
-tun-old: dict argument
- device (string): optional, path of TUN/TAP device file ["/dev/tun*"]
- interface (string): optional, name of tunnel network interface
- interface-search (bool): optional, whether to search for a free tunnel
- interface (True if 'device' not specified, otherwise False)
- ifconfig-path (string): optional, path to ifconfig command
- route-path (string): optional, path to route command
- plus generic netlink options, as for 'null-netlink'
+I recommend you don't specify the 'interface' option unless you're
+doing something that requires the interface name to be constant.
** rsa
Defines:
sha1 (hash closure)
+
+** conffile
+
+Defines:
+ makelist (dictionary => list of definitions)
+ readfile (string => string)
+ map (closure,list => list)
+
+makelist: dictionary
+ returns a list consisting of the definitions in the dictionary. The keys
+ are discarded.
+
+readfile: string
+ reads the named file and returns its contents as a string
+
+map:
+ applies the closure specified as arg1 to each of the elements in the list.
+ Returns a list made up of the outputs of the closure.
~ian / secnet.git / blobdiff