diff options
Diffstat (limited to 'src')
| -rwxr-xr-x | src/start_slip.sh | 62 |
1 files changed, 50 insertions, 12 deletions
diff --git a/src/start_slip.sh b/src/start_slip.sh index 8a9320a..5126756 100755 --- a/src/start_slip.sh +++ b/src/start_slip.sh @@ -1,18 +1,32 @@ #!/bin/sh -# Configurable stuff: +# Configurable stuff. You only ever need to change the IP addresses +# if your LAN already uses 192.168.0.0/24. TTY=/dev/ttyUSB0 # serial port to use -BAUD=9600 # must match compiled-in value in rs232dev.c -SLATTACH=a8_slattach # slattach binary (possibly patched) -SLIP_IFACE=sl0 # probably no need to change this -LOCAL_IP=192.168.0.1 # SLIP IP address for Linux host +BAUD=9600 # must match baud rate in fujichat.cfg on the Atari +LOCAL_IP=192.168.0.1 # SLIP IP address for Linux ("peer") host REMOTE_IP=192.168.0.2 # SLIP IP address for Atari host -IP_FORWARD=yes # Route packets for the Atari? + +# You want these two enabled, unless you're running an IRC server locally, +# and don't want to connect FujiChat to the real Internet: +IP_FORWARD=yes # Route packets for the Atari? (you want this, unless + # you're running an IRC server locally) IP_MASQUERADE=yes # NAT for the Atari? -MASQ_IFACE=eth1 # if NATing, our main (LAM or internet) interface DUMP_PACKETS=yes # Run tcpdump on sl0 interface? +# Optional. Autodetected, if you leave these commented out (recommended). + +#SLATTACH=a8_slattach # slattach binary (possibly patched). if not set, + # search $PATH for a8_slattach, then fall back to + # regular slattach. + +#MASQ_IFACE=eth1 # if NATing, our main (LAM or internet) interface + # (if not set, detect automagically) + +#SLIP_IFACE=sl0 # don't change this unless you know exactly why + # you need to! + # DELAY may not be needed on all systems... # No delay: @@ -26,11 +40,25 @@ DELAY="usleep 250000" # End of config section, start of code: -ifconfig $SLIP_IFACE down 2&>/dev/null -killall $SLATTACH 2&>/dev/null -fuser -k $TTY 2&>/dev/null # make sure nobody's using the port... +# Just in case: +/sbin/modprobe slip 2>/dev/null + +if [ "$SLATTACH" = "" ]; then + SLATTACH="$( which a8_slattach 2>/dev/null )" + if [ "$SLATTACH" = "" ]; then + SLATTACH="$( which slattach 2>/dev/null )" + fi +fi +echo "Using SLATTACH=$SLATTACH" + +# Warning: this assumes nothing else is using SLIP. Probably a safe +# assumption in the 21st century. +SLIP_IFACE="${SLIP_IFACE:-sl0}" +ifconfig $SLIP_IFACE down 2>/dev/null +killall $SLATTACH 2>/dev/null +fuser -k $TTY 2>/dev/null # make sure nobody's using the port... $DELAY -fuser -k -9 $TTY 2&>/dev/null # Just in case... +fuser -k -9 $TTY 2>/dev/null # Just in case... $DELAY echo "Starting SLIP on $SLIP_IFACE, local $LOCAL_IP, remote $REMOTE_IP" @@ -40,7 +68,17 @@ ifconfig $SLIP_IFACE $LOCAL_IP mtu 576 ifconfig $SLIP_IFACE $LOCAL_IP pointopoint $REMOTE_IP if [ "$IP_MASQUERADE" = "yes" ]; then - echo "IP Masquerading enabled" + if [ "$MASQ_IFACE" = "" ]; then + /sbin/ip route show 2>/dev/null | sed -n 's,^default.*dev *\([^ ]*\).*$,\1,p' + if [ "$MASQ_IFACE" = "" ]; then + /sbin/route -n | grep '^0.0.0.0' | rev | cut -d' ' -f1 |rev + if [ "$MASQ_IFACE" = "" ]; then + echo "Can't autodetect default interface, guessing eth0" + MASQ_IFACE="eth0" + fi + fi + fi + echo "IP Masquerading enabled on device $MASQ_IFACE" iptables -F iptables -t nat -F iptables -t nat -A POSTROUTING -o $MASQ_IFACE -j MASQUERADE |