116 lines
2.7 KiB
Bash
Executable File
116 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -eu
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has() {
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command -v "$1" >/dev/null 2>&1
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}
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die() {
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echo $1 &>2
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exit 1
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}
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set_mac() {
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local interface=$1
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local mac_address=$2
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if has ifconfig; then
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ifconfig "$interface" down
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if [[ "$OSTYPE" == "linux-gnu" ]]; then
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ifconfig "$interface" hw ether "$mac_address"
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else
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ifconfig "$interface" ether "$mac_address"
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fi
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ifconfig "$interface" up
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elif has ip; then
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ip link set dev "$interface" down
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ip link set dev "$interface" address "$mac_address"
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ip link set dev "$interface" up
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else
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die "no suitable program found to configure the network interface, need iproute2 or ifconfig"
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fi
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}
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mask2cidr() {
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local netmask=$1
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local nbits=0
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IFS=.
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for dec in "$netmask"; do
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case $dec in
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255) let nbits+=8;;
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254) let nbits+=7;;
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252) let nbits+=6;;
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248) let nbits+=5;;
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240) let nbits+=4;;
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224) let nbits+=3;;
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192) let nbits+=2;;
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128) let nbits+=1;;
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0);;
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*) die "Error: $dec is not recognised"
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esac
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done
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echo "$nbits"
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}
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set_ip() {
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local interface=$1
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local ip=$2
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local netmask=$3
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if has ifconfig; then
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ifconfig "$interface" "$ip" netmask "$netmask"
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elif has ip; then
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ip addr add "$ip" dev "$interface"
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else
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die "no suitable program found to set ip address, need iproute2 or ifconfig"
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fi
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}
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start_dhclient() {
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local interface=$1
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if [[ "$OSTYPE" == "linux-gnu" ]]; then
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dhclient -nw "$interface"
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elif [[ "$OSTYPE" == "freebsd"* ]]; then
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dhclient -b "$interface"
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else
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nohup setsid dhclient "$interface" >/dev/null 2>&1
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fi
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}
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start_dhcp() {
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local interface=$1
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if has dhcpcd; then
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dhcpcd -b -n "$interface"
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elif has dhclient; then
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start_dhclient "$interface"
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elif [[ "$OSTYPE" == "darwin"* ]]; then # TODO untested
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ipconfig set "$interface" DHCP
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else
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die "no suitable dhcp program found, need dhcpcd or dhclient"
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fi
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}
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[ -z "${INTERFACE:-}" ] && die "no INTERFACE environment variable set"
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DIR=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
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MAC_ADDRESS_FILE="${DIR}/tinc-macaddr"
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SUBNET_FILE="${DIR}/tinc-subnet"
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LOCAL_HOOK_FILE="${DIR}/tinc-up.local"
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if [ ! -f "$MAC_ADDRESS_FILE" ]; then
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die "${MAC_ADDRESS_FILE} does not exists. Generate it with ./tinc-generate-mac"
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fi
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read -r MAC_ADDRESS <"$MAC_ADDRESS_FILE"
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set_mac "$INTERFACE" "$MAC_ADDRESS"
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if [ -e $SUBNET_FILE ]; then
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read -a SUBNET <"$SUBNET_FILE"
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IP=${SUBNET[0]}
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NETMASK=${SUBNET[1]}
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[ -z "$IP" ] && die "no ip set in '$SUBNET_FILE'"
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[ -z "$NETMASK" ] && die "no netmask set in '$SUBNET_FILE'"
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set_ip "$INTERFACE" "$IP" "$NETMASK"
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else
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start_dhcp "$INTERFACE"
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fi
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[ -x "$LOCAL_HOOK_FILE" ] && "$LOCAL_HOOK_FILE"
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