150 lines
5.0 KiB
Bash
150 lines
5.0 KiB
Bash
#!/bin/bash
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# EchoMAV, LLC
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# This script sets up a static network on the EchoPilot AI using NetworkManager (nmcli)
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# usage: static-network.sh -i {interface} -a {ip_addres|auto|dhcp} -g {gateway(optional)}
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# If auto is used, the static IP address will be set to 10.223.x.y where x and y are the last two octects of the network interface mac address
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# The first two octets cab be changed per IP_PREFIX
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# An alias is also added to the interface with the value of BACKDOOR_ADDR
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IP_PREFIX="192.168"
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BACKDOOR_ADDR="192.168.154.0/24"
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sigterm_handler() {
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echo "Shutdown signal received."
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exit 1
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}
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## Setup signal trap
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trap 'trap " " SIGINT SIGTERM SIGHUP; kill 0; wait; sigterm_handler' SIGINT SIGTERM SIGHUP
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SUDO=$(test ${EUID} -ne 0 && which sudo)
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function print_help { echo "Usage: ./static-network.sh -i interface_name -a ip_addres|auto -g gateway_address(optional)" >&2 ; }
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# process args
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while getopts :i:a:g:h: flag;
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do
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case "${flag}" in
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h) print_help
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exit 1
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;;
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i) IFACE=${OPTARG};;
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a) IP_INPUT=${OPTARG};;
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g) GATEWAY=${OPTARG};;
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*) print_help
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exit 1
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;;
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esac
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done
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# check mandatory arguments
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if [ -z $IP_INPUT ]; then
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echo 'Missing mandatory -a argument' >&2
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print_help
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exit 1
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fi
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if [ -z $IFACE ]; then
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echo 'Missing mandatory -i argument' >&2
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print_help
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exit 1
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fi
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if [ $IP_INPUT = "auto" ]; then
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ifconfig ${IFACE} &> /dev/null
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if [ $? -ne 0 ]
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then
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echo "ERROR: Failed to get information for interface ${IFACE}, does it really exist?"
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echo ""
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echo "Here is output of ip link show:"
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ip link show
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exit 1
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fi
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echo "Determining the auto static IP address for interface ${IFACE}...";
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# Get the mac address
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MAC_ADDRESS=$(ifconfig ${IFACE} | awk '/ether/ {print $2}')
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OCT1DEC=$((0x`ifconfig ${IFACE} | awk '/ether/ {print $2}' | awk '{split($0,a,"[:]"); print a[5]}'`))
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OCT2DEC=$((0x`ifconfig ${IFACE} | awk '/ether/ {print $2}' | awk '{split($0,a,"[:]"); print a[6]}'`))
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echo "MAC address for ${IFACE} is $MAC_ADDRESS";
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if ! [[ $OCT1DEC =~ ^[0-9]{1,3} && $OCT2DEC =~ ^[0-9]{1,3} ]] ; then
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echo "Error: Failure calculating the target IP address" >&2; exit 1
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fi
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HOST="$IP_PREFIX.$OCT1DEC.$OCT2DEC";
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NETMASK=16;
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echo "Auto-calculated IP is $HOST/$NETMASK";
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elif [ $IP_INPUT = "dhcp" ]; then
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#if static-iface exists, then mod to dhcp
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exist=$(nmcli c show "static-$IFACE" 2>/dev/null)
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if [ ! -z "$exist" ] ; then # delete the interface if it exists
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$SUDO nmcli con mod "static-$IFACE" ipv4.method auto
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$SUDO nmcli con mod "static-$IFACE" ipv4.gateway ""
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$SUDO nmcli con mod "static-$IFACE" ipv4.addresses ""
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$SUDO nmcli con down "static-$IFACE"
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$SUDO nmcli con up "static-$IFACE"
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else
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echo "Error: connection static-$IFACE is not found. This script is only designed to convert an existing static-$IFACE to DHCP";
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fi
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echo "Connection static-$IFACE is now set to DHCP";
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exit
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else
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# validate ip address
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if [[ ! $IP_INPUT =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\/[0-9]{1,3}$ ]]; then
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echo "ERROR! Invalid IP Address, should be x.x.x.x/y where y is the subnet mask" >&2; exit 1
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fi
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HOST=$(echo ${IP_INPUT} | cut -d/ -f 1);
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NETMASK=$(echo ${IP_INPUT} | cut -d/ -f 2);
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echo "Configuring ${IFACE} with the provided static IP address ${HOST}/${NETMASK}";
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fi
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# check if there is a connection called Wired connection 1", if so take it down and delete\
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state=$(nmcli -f GENERAL.STATE c show "Wired connection 1" 2>/dev/null)
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if [[ "$state" == *activated* ]] ; then # take the interface down
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$SUDO nmcli c down "Wired connection 1"
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fi
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exist=$(nmcli c show "Wired connection 1" 2>/dev/null)
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if [ ! -z "$exist" ] ; then # delete the interface if it exists
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echo "Removing Wired connection 1..."
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$SUDO nmcli c delete "Wired connection 1"
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fi
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# check if there is already an interface called static-$IFACE, if so take down and delete
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state=$(nmcli -f GENERAL.STATE c show "static-$IFACE" 2>/dev/null)
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if [[ "$state" == *activated* ]] ; then # take the interface down
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$SUDO nmcli c down "static-$IFACE"
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fi
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exist=$(nmcli c show "static-$IFACE" 2>/dev/null)
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if [ ! -z "$exist" ] ; then # delete the interface if it exists
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$SUDO nmcli c delete "static-$IFACE"
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fi
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echo "Creating new connection static-$IFACE..."
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$SUDO nmcli c add con-name "static-$IFACE" ifname $IFACE type ethernet ip4 $HOST/$NETMASK
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# if gateway was provided, add that info to the connection
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if [[ "$GATEWAY" == *.* ]]
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then
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echo "Defining gateway ${GATEWAY}...";
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$SUDO nmcli c mod "static-$IFACE" ifname $IFACE gw4 $GATEWAY
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fi
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# add backdoor ip address
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$SUDO nmcli c mod "static-$IFACE" +ipv4.addresses "$BACKDOOR_ADDR"
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# bring up the interface
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$SUDO nmcli c up "static-$IFACE"
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echo "";
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echo "Static Ethernet Configuration Successful! Interface $IFACE is set to $HOST/$NETMASK"
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echo ""
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