From 2973d0c78e9b8eed3c5af239927c6bd36af64604 Mon Sep 17 00:00:00 2001
From: "B. Watson" <yalhcru@gmail.com>
Date: Wed, 13 Mar 2019 02:50:42 -0400
Subject: initial commit

---
 src/start_slip.sh | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100755 src/start_slip.sh

(limited to 'src/start_slip.sh')

diff --git a/src/start_slip.sh b/src/start_slip.sh
new file mode 100755
index 0000000..8a9320a
--- /dev/null
+++ b/src/start_slip.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# Configurable stuff:
+
+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
+REMOTE_IP=192.168.0.2  # SLIP IP address for Atari host
+IP_FORWARD=yes         # Route packets for the Atari?
+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?
+
+# DELAY may not be needed on all systems...
+
+# No delay:
+#DELAY="true"
+
+# 1 second:
+#DELAY="sleep 1"
+
+# 1/4 second (may not work on old Linux installs):
+DELAY="usleep 250000"
+
+# End of config section, start of code:
+
+ifconfig $SLIP_IFACE down 2&>/dev/null
+killall $SLATTACH 2&>/dev/null
+fuser -k $TTY 2&>/dev/null # make sure nobody's using the port...
+$DELAY
+fuser -k -9 $TTY 2&>/dev/null # Just in case...
+$DELAY
+
+echo "Starting SLIP on $SLIP_IFACE, local $LOCAL_IP, remote $REMOTE_IP"
+$SLATTACH -L -p slip -s $BAUD $TTY &
+$DELAY
+ifconfig $SLIP_IFACE $LOCAL_IP mtu 576
+ifconfig $SLIP_IFACE $LOCAL_IP pointopoint $REMOTE_IP
+
+if [ "$IP_MASQUERADE" = "yes" ]; then
+	echo "IP Masquerading enabled"
+	iptables -F
+	iptables -t nat -F
+	iptables -t nat -A POSTROUTING -o $MASQ_IFACE -j MASQUERADE
+fi
+
+if [ "$IP_FORWARD" = "yes" ]; then
+	echo "IP Forwarding enabled"
+	echo "1" > /proc/sys/net/ipv4/ip_forward
+fi
+
+if [ "$DUMP_PACKETS" = "yes" ]; then
+	tcpdump -i $SLIP_IFACE -X -n -vvv -s 0
+fi
-- 
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