[B2-devel] TUN/TAP support

[Gwenole B. <gb...@di...>]

Hi,

I have committed code to enable TUN/TAP ("tun" module) support in both 
Basilisk II and SheepShaver. That's cool, I can even get Internet 
connection at home through an ethernet DSL modem. A possible extension 
to the tunconfig script (derived from MOL's) is to install a DHCP 
server on the tunX interface so that users only need to configure for a 
DHCP client on the Mac side.

I have yet to little-endian & 64-bit fix networking code in 
SheepShaver. TUN/TAP is also supposed to work on FreeBSD and Solaris 
but without adequate system I can't test and tunconfig may need some 
arrangements.

I am not a networking wizard, so if someone could proofread and make 
sure the following portion added to the README file is understandable, 
that would be fine. Thanks.

       3. Access the network through a "tuntap" interface.
          The "ethernet card description" must be set to "tun".

          TUN/TAP provides packet reception and transmission for user
          space programs.  It can be viewed as a simple Point-to-Point
          or Ethernet device, which instead of receiving packets from a
          physical media, receives them from user space program and
          instead of sending packets via physical media writes them to
          the user space program.

          A virtual network configuration script is required and the
          default is /usr/local/BasiliskII/tunconfig unless you specify
          a different file with the "etherconfig" item.

          This script requires you that "sudo" is properly configured
          so that "/sbin/ifconfig" and "/sbin/iptables" can be executed
          as root. Otherwise, you can still write a helper script which
          invokes your favorite program to enhance a user priviledges.
          e.g. in a KDE environment, kdesu can be used as follows:

            #!/bin/sh
            exec /usr/bin/kdesu -c /path/to/tunconfig $1 $2