195 lines
8.0 KiB
Plaintext
195 lines
8.0 KiB
Plaintext
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#!/usr/bin/with-contenv bash
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# https://github.com/arankaren/docker-wireguard/blob/master/root/etc/s6-overlay/s6-rc.d/init-wireguard-confs/run
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# prepare symlinks
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rm -rf /etc/wireguard
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mkdir -p /etc/wireguard
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ln -s /config/wg0.conf /etc/wireguard/wg0.conf
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# prepare templates
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[[ ! -f /config/templates/server.conf ]] && \
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cp /defaults/server.conf /config/templates/server.conf
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[[ ! -f /config/templates/peer.conf ]] && \
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cp /defaults/peer.conf /config/templates/peer.conf
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# add preshared key to user templates (backwards compatibility)
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if ! grep -q 'PresharedKey' /config/templates/peer.conf; then
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sed -i 's|^Endpoint|PresharedKey = \$\(cat /config/\${PEER_ID}/presharedkey-\${PEER_ID}\)\nEndpoint|' /config/templates/peer.conf
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fi
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generate_confs () {
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mkdir -p /config/server
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if [ ! -f /config/server/privatekey-server ]; then
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umask 077
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wg genkey | tee /config/server/privatekey-server | wg pubkey > /config/server/publickey-server
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fi
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eval "`printf %s`
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cat <<DUDE > /config/wg0.conf
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`cat /config/templates/server.conf`
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DUDE"
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for i in ${PEERS_ARRAY[@]}; do
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if [[ ! "${i}" =~ ^[[:alnum:]]+$ ]]; then
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echo "**** Peer ${i} contains non-alphanumeric characters and thus will be skipped. No config for peer ${i} will be generated. ****"
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else
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if [[ "${i}" =~ ^[0-9]+$ ]]; then
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PEER_ID="peer${i}"
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else
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PEER_ID="peer_${i}"
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fi
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mkdir -p /config/${PEER_ID}
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if [ ! -f "/config/${PEER_ID}/privatekey-${PEER_ID}" ]; then
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umask 077
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wg genkey | tee /config/${PEER_ID}/privatekey-${PEER_ID} | wg pubkey > /config/${PEER_ID}/publickey-${PEER_ID}
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wg genpsk > /config/${PEER_ID}/presharedkey-${PEER_ID}
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fi
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if [ -f "/config/${PEER_ID}/${PEER_ID}.conf" ]; then
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CLIENT_IPV4=$(cat /config/${PEER_ID}/${PEER_ID}.conf | grep "Address" | awk '{print substr($3, 1, length($3)-1)}')
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if [ -n "${ORIG_INTERFACE_IPV4}" ] && [ "${INTERFACE_IPV4}" != "${ORIG_INTERFACE_IPv4}" ]; then
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CLIENT_IPV4=$(echo "${CLIENT_IPV4}" | sed "s|${ORIG_INTERFACE_IPV4}|${INTERFACE_IPV4}|")
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fi
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CLIENT_IPV6=$(cat /config/${PEER_ID}/${PEER_ID}.conf | grep "Address" | awk '{print $NF}')
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if [ -n "${ORIG_INTERFACE_IPV6}" ] && [ "${INTERFACE_IPV6}" != "${ORIG_INTERFACE_IPV6}" ]; then
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CLIENT_IPV6=$(echo "${CLIENT_IPV6}" | sed "s|${ORIG_INTERFACE_IPV6}|${INTERFACE_IPV6}|")
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fi
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else
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for idx in {2..254}; do
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PROPOSED_IPV4="${INTERFACE_IPV4}.${idx}"
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if ! grep -q -R "${PROPOSED_IPV4}" /config/peer*/*.conf 2>/dev/null && ([ -z "${ORIG_INTERFACE}" ] || ! grep -q -R "${ORIG_INTERFACE}.${idx}" /config/peer*/*.conf 2>/dev/null); then
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CLIENT_IPV4="${PROPOSED_IPV4}"
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break
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fi
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done
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for idx in {2..254}; do
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PROPOSED_IPV6="${INTERFACE_IPV6}.${idx}"
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if ! grep -q -R "${PROPOSED_IPV6}" /config/peer*/*.conf 2>/dev/null && ([ -z "${ORIG_INTERFACE}" ] || ! grep -q -R "${ORIG_INTERFACE}.${idx}" /config/peer*/*.conf 2>/dev/null); then
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CLIENT_IPV6="${PROPOSED_IPV6}"
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break
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fi
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done
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fi
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if [ -f "/config/${PEER_ID}/presharedkey-${PEER_ID}" ]; then
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# create peer conf with presharedkey
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eval "`printf %s`
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cat <<DUDE > /config/${PEER_ID}/${PEER_ID}.conf
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`cat /config/templates/peer.conf`
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DUDE"
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# add peer info to server conf with presharedkey
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cat <<DUDE >> /config/wg0.conf
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[Peer]
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# ${PEER_ID}
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PublicKey = $(cat /config/${PEER_ID}/publickey-${PEER_ID})
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PresharedKey = $(cat /config/${PEER_ID}/presharedkey-${PEER_ID})
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DUDE
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else
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echo "**** Existing keys with no preshared key found for ${PEER_ID}, creating confs without preshared key for backwards compatibility ****"
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# create peer conf without presharedkey
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eval "`printf %s`
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cat <<DUDE > /config/${PEER_ID}/${PEER_ID}.conf
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`cat /config/templates/peer.conf | sed '/PresharedKey/d'`
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DUDE"
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# add peer info to server conf without presharedkey
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cat <<DUDE >> /config/wg0.conf
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[Peer]
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# ${PEER_ID}
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PublicKey = $(cat /config/${PEER_ID}/publickey-${PEER_ID})
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DUDE
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fi
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SERVER_ALLOWEDIPS=SERVER_ALLOWEDIPS_PEER_${i}
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# add peer's allowedips to server conf
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if [ -n "${!SERVER_ALLOWEDIPS}" ]; then
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echo "Adding ${!SERVER_ALLOWEDIPS} to wg0.conf's AllowedIPs for peer ${i}"
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cat <<DUDE >> /config/wg0.conf
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AllowedIPs = ${CLIENT_IPV4}/32,${!SERVER_ALLOWEDIPS}
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DUDE
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else
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cat <<DUDE >> /config/wg0.conf
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AllowedIPs = ${CLIENT_IPV4}/32,${CLIENT_IPV6}/128
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DUDE
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fi
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if [ -z "${LOG_CONFS}" ] || [ "${LOG_CONFS}" = "true" ]; then
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echo "PEER ${i} QR code:"
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qrencode -t ansiutf8 < /config/${PEER_ID}/${PEER_ID}.conf
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else
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echo "PEER ${i} conf and QR code png saved in /config/${PEER_ID}"
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fi
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qrencode -o /config/${PEER_ID}/${PEER_ID}.png < /config/${PEER_ID}/${PEER_ID}.conf
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fi
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done
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}
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save_vars () {
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cat <<DUDE > /config/.donoteditthisfile
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ORIG_SERVERURL="$SERVERURL"
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ORIG_SERVERPORT="$SERVERPORT"
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ORIG_PEERDNS="$PEERDNS"
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ORIG_PEERS="$PEERS"
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ORIG_INTERFACE_IPV4="$INTERFACE_IPV4"
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ORIG_INTERFACE_IPV6="$INTERFACE_IPV6"
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ORIG_ALLOWEDIPS="$ALLOWEDIPS"
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DUDE
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}
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if [ -n "$PEERS" ]; then
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echo "**** Server mode is selected ****"
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if [[ "$PEERS" =~ ^[0-9]+$ ]] && ! [[ "$PEERS" =~ *,* ]]; then
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PEERS_ARRAY=($(seq 1 $PEERS))
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else
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PEERS_ARRAY=($(echo "$PEERS" | tr ',' ' '))
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fi
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PEERS_COUNT=$(echo "${#PEERS_ARRAY[@]}")
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if [ -z "$SERVERURL" ] || [ "$SERVERURL" = "auto" ]; then
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SERVERURL=$(curl -s icanhazip.com)
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echo "**** SERVERURL var is either not set or is set to \"auto\", setting external IP to auto detected value of $SERVERURL ****"
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else
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echo "**** External server address is set to $SERVERURL ****"
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fi
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SERVERPORT=${SERVERPORT:-51820}
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echo "**** External server port is set to ${SERVERPORT}. Make sure that port is properly forwarded to port 51820 inside this container ****"
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INTERNAL_SUBNET_IPV4=${INTERNAL_SUBNET_IPV4:-10.13.13.0}
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echo "**** Internal subnet is set to $INTERNAL_SUBNET_IPV4 ****"
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INTERFACE_IPV4=$(echo "$INTERNAL_SUBNET_IPV4" | awk 'BEGIN{FS=OFS="."} NF--')
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INTERNAL_SUBNET_IPV6=${INTERNAL_SUBNET_IPV6:-fd42:42:42::0}
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echo "**** Internal subnet is set to $INTERNAL_SUBNET_IPV6 ****"
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INTERFACE_IPV6=$(echo "$INTERNAL_SUBNET_IPV6" | awk 'BEGIN{FS=OFS="::"} NF--')
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ALLOWEDIPS=${ALLOWEDIPS:-0.0.0.0/0, ::/0}
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echo "**** AllowedIPs for peers $ALLOWEDIPS ****"
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if [ -z "$PEERDNS" ] || [ "$PEERDNS" = "auto" ]; then
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PEERDNS="${INTERFACE_IPV4}.1, ${INTERFACE_IPV6}::1"
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echo "**** PEERDNS var is either not set or is set to \"auto\", setting peer DNS to ${INTERFACE_IPV4}.1 and ${INTERFACE_IPV6}::1 to use wireguard docker host's DNS. ****"
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else
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echo "**** Peer DNS servers will be set to $PEERDNS ****"
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fi
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if [ ! -f /config/wg0.conf ]; then
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echo "**** No wg0.conf found (maybe an initial install), generating 1 server and ${PEERS} peer/client confs ****"
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generate_confs
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save_vars
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else
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echo "**** Server mode is selected ****"
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[[ -f /config/.donoteditthisfile ]] && \
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. /config/.donoteditthisfile
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if [ "$SERVERURL" != "$ORIG_SERVERURL" ] || [ "$SERVERPORT" != "$ORIG_SERVERPORT" ] || [ "$PEERDNS" != "$ORIG_PEERDNS" ] || [ "$PEERS" != "$ORIG_PEERS" ] || [ "$INTERFACE_IPV4" != "$ORIG_INTERFACE_IPV4" ] || [ "$INTERFACE_IPV6" != "$ORIG_INTERFACE_IPV6" ] || [ "$ALLOWEDIPS" != "$ORIG_ALLOWEDIPS" ]; then
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echo "**** Server related environment variables changed, regenerating 1 server and ${PEERS} peer/client confs ****"
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generate_confs
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save_vars
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else
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echo "**** No changes to parameters. Existing configs are used. ****"
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fi
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fi
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else
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echo "**** Client mode selected. ****"
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if [ ! -f /config/wg0.conf ]; then
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echo "**** No client conf found. Provide your own client conf as \"/config/wg0.conf\" and restart the container. ****"
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sleep infinity
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fi
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printf "false" > /run/s6/container_environment/USE_COREDNS
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fi
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# set up CoreDNS
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[[ ! -f /config/coredns/Corefile ]] && \
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cp /defaults/Corefile /config/coredns/Corefile
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# permissions
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chown -R abc:abc \
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/config
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