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lightweight network sharing - share your mobile connection via wifi
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README
VERSION
wshare
wshare.conf

README

wshare
======

   wshare is a simple program to share an existing network connection. There are
   two modes, *master* and *client*. The master shares an existing network
   connection (probably to the internet) via an unused wireless device. The client
   can connect either via the operating system provided facilities or this script
   in client mode - which is the default. To enable a master supply the the *-m*
   parameter to the script.

   wshare is currently *linux only*, released under the *GPLv3* and avaible via git:
   git clone git://github.com/stef/wshare.git

   the script itself is very short, 
   "download it directly":http://github.com/stef/wshare/tarball/v1.0.1

behind the scenes

   In master mode (*-m*), 
   # the wireless device is switched to ad-hoc mode
   # the essid is set
   # optionally - an encryption key is set (*experimental* WEP only currently)
   # the device is brought up via _ifconfig_
   # NAT is set up
   # dhcpd3 server is configured and brought up to provide network and nameserver settings.

   In client mode,  
   # the wireless device is switched to ad-hoc mode
   # the essid is set
   # optionally - an encryption key is set (*experimental* WEP only currently)
   # the device is brought up via _ifconfig_
   # dhclient is run to retrieve shared network information from the Master dhcpd3 server

example

   to share a network, either set the parameters in the config file, or adapt the call below:
      # wshare -m -o ppp0 -i eth0
   the important switch is *-m*, which is necessary for enabling the master mode.
 
   to connect to such a shared network simply call 
      # wshare -i eth0
   or you could use NetworkManager under linux, or your operating system provided facilities.

Common settings

   the following parameters are to be set either via a configuration file
   (/etc/wshare.conf, ~/.wshare.conf or in the same directory where the wshare
   script is located) or or superseding these via command line parameters. 

   Common parameters are necessary for both master and client operation.

      innet

      set internal network, over which the external is shared. this **must** be a
      wireless device, if none is set, the script tries to use the first device from
      /proc/net/wireless.
      * default: ath0
      * command line: -i <device>

      essid

      set the essid of the shared network master
      * default: wshared
      * command line: -e <essid>

      key

      specify the key for WEP encryption of the internal network. beware this is yet untested and probably not working
      * default: unset
      * command line: -k <key>

   Master settings

      these settings are only necessary for nodes acting as masters.

      subnet

      specify the subnet of the internal network. this must be in the /24 range currently... thus it is only possible to specify networks with 3 of four octets
      * default: 10.17.17
      * command line: -n <X.X.X>

      exnet

      specify which network to share, this is the device that connects to the internet
      * default: ppp0
      * command line: -o <device>

      ownip

      specify Master IP address, defaults to <subnet>.1
      * default: 10.17.17.1
      * command line: -a <X.X.X.X>
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