Naszvadi at 11:03, 24 June 2016

2016-06-24T11:03:44Z

Naszvadi at 20:24, 19 June 2016

2016-06-19T20:24:40Z

Naszvadi: Example slip configuration on ubuntu host

2016-06-19T20:13:34Z

Example slip configuration on ubuntu host

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DOSBox supports nullmodem connection using tcp sockets. In this page, we describe a simple networking slip configuration on linux (ubuntu) host. With socat or similar tools on host's side, you can connect these sockets with slattach, and the DOSBox guest can access internet as well.

== Prerequisities under ubuntu ==

=== Internet settings ===

A working internet connection is essential.
192.168.7.0/30 network must be unused! Otherwise network range collision will happen, causing unpredictable results!

=== Required ubuntu packages ===

And also the following packages needs to be installed:

apt-get install bash dosbox iptables socat sudo unzip wget

=== The main script: slipbox.sh ===

The content of the slipbox.sh

#! /bin/bash

flushipt() {
for i in $( iptables -t nat -n --line-numbers -L | awk '/^Chain POSTROUTING/,/^$/{print $0}' \
| grep '^[0-9]' | grep '192\.168\.7\.' | awk '{ print $1 }' | tac )
do
iptables -t nat -D POSTROUTING "$i"
done

for i in $( iptables -t nat -n --line-numbers -L | awk '/^Chain PREROUTING/,/^$/{print $0}' \
| grep ^[0-9] | grep '192\.168\.7\.' | awk '{ print $1 }' | tac )
do
iptables -t nat -D PREROUTING "$i"
done
}

if id -u | grep -q '^0'; then
:
else
echo 'dosbox slip setter'
echo 'Author: Naszvadi Peter'
echo
echo "Please run ''$0'' as root!"
echo
exit 1
fi

if ! which socat; then
echo
echo 'Install socat! It is required.'
echo
echo 'e.g. sudo apt-get install socat'
echo
exit 1
fi

if ! which slattach; then
echo
echo 'Install slattach! It is required.'
echo
exit 1
fi

if ! which dosbox; then
echo
echo 'Install dosbox! It is required.'
echo
exit 1
fi

Uid="$(find "$0" -printf '%U' -quit)"

if [ -z "$(find . -iname ethersl.com)" ]; then
if ! which unzip; then
echo
echo 'Install unzip! It is required.'
echo
exit 1
fi
if ! which wget; then
echo
echo 'Install wget! It is required.'
echo
exit 1
fi
sudo -u "#$Uid" bash -c 'wget -q http://crynwr.com/drivers/pktd11.zip \
&& unzip -Cj pktd11.zip ethersl.com'
fi

if [ -z "$(find . -iname ethersl.com)" ]; then
echo
echo 'Unsuccesful: getting ethersl.com'
echo
exit 1
fi

if [ -z "$(find . -iname ircjr.exe)" ]; then
if ! which unzip; then
echo
echo 'Install unzip! It is required.'
echo
exit 1
fi
if ! which wget; then
echo
echo 'Install wget! It is required.'
echo
exit 1
fi
sudo -u "#$Uid" bash -c 'wget -q -O mtcp.zip http://www.brutman.com/mTCP/mTCP_2013-05-23.zip \
&& unzip -Cj mtcp.zip ircjr.exe'
fi

if [ -z "$(find . -iname ircjr.exe)" ]; then
echo
echo 'Unsuccesful: getting ircjr.exe'
echo
exit 1
fi

echo Flushing...
flushipt
echo Flushing done

Dev_Pts='/tmp/slip'"$RANDOM"
Slip_Port=8040

if ! [ -e dosslip.cnf ]; then
sudo -u "#$Uid" bash -c 'cat <<END > dosslip.cnf
[sdl]
mapperfile=mapper.map
[serial]
serial1=nullmodem server:localhost port:'"$Slip_Port"' transparent:1
[autoexec]
mount C .
C:
ethersl 0x60 4 0x3f8 9600
SET MTCPSLIP=true
SET MTCPCFG=C:\\MTCP.CFG
ircjr irc.freenode.net #dosbox
END'
fi

if ! [ -e mtcp.cfg ]; then
sudo -u "#$Uid" bash -c 'cat <<END > mtcp.cfg
DHCPVER DHCP Client version Jul 29 2011
TIMESTAMP Mon May 21 13:14:59 2012
packetint 0x60
hostname DOSRules
ircjr_nick dbxij'"$RANDOM"'
ircjr_user dbxij'"$RANDOM"'
ircjr_name McBus Luck
ircjr_connect_timeout 300
ircjr_register_timeout 300
ftpsrv_password_file NUL
ftpsrv_log_file NUL
IPADDR 192.168.7.2
NETMASK 255.255.255.252
GATEWAY 192.168.7.1
NAMESERVER 8.8.8.8
LEASE_TIME 600
END'
fi

socat PTY,link="$Dev_Pts",raw,echo=0 TCP-LISTEN:"$Slip_Port" &
Pid_Saved_3="$!"
sleep 1

sudo -u "#$Uid" dosbox -conf dosslip.cnf &
Pid_Saved="$!"

# setting linux ipv4 forwarding
grep -q 1 /proc/sys/net/ipv4/ip_forward || ( echo 1 1>/proc/sys/net/ipv4/ip_forward )

slattach -d -s 9600 -p adaptive "$Dev_Pts" 1>/dev/null 2>/dev/null &
Pid_Saved_2="$!"

sleep 3

ifconfig sl0 192.168.7.1 dstaddr 192.168.7.2 netmask 255.255.255.252 mtu 576 up 1>/dev/null 2>/dev/null
set -x
iptables -t nat -A POSTROUTING -s 192.168.7.0/30 -j MASQUERADE 1>/dev/null 2>/dev/null

set +x
while ps "$Pid_Saved" 1>/dev/null 2>/dev/null; do
sleep 5
done 1>/dev/null 2>/dev/null

2>&-
kill -9 "$Pid_Saved_2" "$Pid_Saved_3" 1>/dev/null 2>/dev/null

echo Flushing...
flushipt
echo Flushing done

exit 0
## This is the end of slipbox.sh !

Before invoking the "sudo ./dosslip.sh" from terminal, a mapper.map file should be generated, in which the alt key assigned to right ctrl. See more on [[Keymapper]] . Mapperfile creation step is only needed for this specific example, for the running of mTCP irc client "ircjr", which needs alt-[NUM] keycombos for changing between windows.

== Launch a networked session under ubuntu ==

=== Creating working directory ===

Create a standalone folder, e.g. mkdir ~/dosslip

=== Creating files ===

Only slipbox.sh and mapper.map is needed. slipbox.sh should be saved from this site, and mapper.map could be created by invoking

dosbox -conf /dev/null .

in dosslip folder (ctrl-f1, save). Rename mapper* to mapper.map, then edit it: replace 'key_lalt' line to 'key_lalt "key 305"'

Set attributes of slipbox.sh:

chmod 755 slipbox.sh

Optionally, you can get and place ETHERSL.COM from crynwr packet driver collection and IRCJR.EXE from mTCP collection, but these are downloaded during the running of dosslip, if they don't exist.

=== Launch ./slipbox.sh ===

Do it with sudo:

sudo ./slipbox.sh

If everything is okay, you can get similar result like this:

[[File:dosbox_slip_ircjr.gif]]

=== Links ===

* http://www.brutman.com/mTCP/mTCP.html
* http://crynwr.com/drivers/

@@ Line 1: / Line 1: @@
 DOSBox supports nullmodem connection using tcp sockets. In this page, we describe a simple networking slip configuration on linux (ubuntu) host. With socat or similar tools on host's side, you can connect these sockets with slattach, and the DOSBox guest can access internet as well.
 == Prerequisities under ubuntu ==
@@ Line 13: / Line 17: @@
   apt-get install bash dosbox iptables socat sudo unzip wget
 === The main script: slipbox.sh ===

@@ Line 196: / Line 196: @@
   ## This is the end of slipbox.sh !
-Before invoking the "sudo ./dosslip.sh" from terminal, a mapper.map file should be generated, in which the alt key assigned to right ctrl. See more on [[Keymapper]] . Mapperfile creation step is only needed for this specific example, for the running of mTCP irc client "ircjr", which needs alt-[NUM] keycombos for changing between windows.
+Before invoking the "sudo ./slipbox.sh" from terminal, a mapper.map file should be generated, in which the alt key assigned to right ctrl. See more on [[Keymapper]] . Mapperfile creation step is only needed for this specific example, for the running of mTCP irc client "ircjr", which needs alt-[NUM] keycombos for changing between windows.
 == Launch a networked session under ubuntu ==

Slip configuration on linux host - Revision history

Naszvadi at 11:03, 24 June 2016

Naszvadi at 20:24, 19 June 2016

Naszvadi: Example slip configuration on ubuntu host