1 files changed, 72 insertions, 0 deletions
diff --git a/networking/usb/host.sh b/networking/usb/host.sh
new file mode 100644
index 0000000..a4e9345
--- /dev/null
+++ b/networking/usb/host.sh
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+# Replicant USB Networking
+# ========================                             
+# 
+# Copyright (C) 2011 Paul Kocialkowski, GPLv3+
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+IPTABLES_CLEAN_RULES=true
+
+USB_IFACE="usb0" 
+INTERNET_IFACE="eth0" 
+
+USB_IFACE_IP="192.168.4.200" 
+
+# Clean iptables rules
+
+iptables_rules_clean () {
+    if [ $IPTABLES_CLEAN_RULES = false ]
+    then
+        return
+    fi
+
+    iptables --flush
+    iptables --table nat --flush
+    iptables --delete-chain
+    iptables --table nat --delete-chain
+}
+
+# Inject iptables forwarding rules
+
+iptables_forward_rules_apply () {
+    iptables --table nat --append POSTROUTING --out-interface $INTERNET_IFACE -j MASQUERADE
+    iptables --append FORWARD --in-interface $USB_IFACE -j ACCEPT
+    echo 1 > /proc/sys/net/ipv4/ip_forward 
+}
+
+# Configure network link
+
+usb_networking_configure () {
+    ifconfig $USB_IFACE up
+    ifconfig $USB_IFACE $USB_IFACE_IP
+}
+
+usb_networking_disable () {
+    ifconfig $USB_IFACE down
+    echo 0 > /proc/sys/net/ipv4/ip_forward 
+}
+
+case $1 in
+    "start")
+        echo "Starting Replicant USB Networking" 
+        iptables_rules_clean
+        usb_networking_configure
+        iptables_forward_rules_apply
+    ;;
+    "stop")
+        echo "Stopping Replicant USB Networking" 
+        usb_networking_disable
+        iptables_rules_clean
+    ;;
+    *)
+        echo "Usage: sh $0 {start|stop}" 
+    ;;
+esac