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191 lines
7.6 KiB
Plaintext
191 lines
7.6 KiB
Plaintext
#!/usr/bin/with-contenv bash
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# shellcheck shell=bash
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# shellcheck disable=SC2016,SC1091,SC2183
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# prepare templates
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if [[ ! -f /config/templates/server.conf ]]; then
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cp /defaults/server.conf /config/templates/server.conf
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fi
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if [[ ! -f /config/templates/peer.conf ]]; then
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cp /defaults/peer.conf /config/templates/peer.conf
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fi
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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}/${PEER_ID}.conf" ]]; then
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CLIENT_IP=$(grep "Address" "/config/${PEER_ID}/${PEER_ID}.conf" | awk '{print $NF}')
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if [[ -n "${ORIG_INTERFACE}" ]] && [[ "${INTERFACE}" != "${ORIG_INTERFACE}" ]]; then
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CLIENT_IP="${CLIENT_IP//${ORIG_INTERFACE}/${INTERFACE}}"
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fi
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else
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for idx in {2..254}; do
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PROPOSED_IP="${INTERFACE}.${idx}"
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if ! grep -q -R "${PROPOSED_IP}" /config/peer*/*.conf 2>/dev/null && ([[ -z "${ORIG_INTERFACE}" ]] || ! grep -q -R "${ORIG_INTERFACE}.${idx}" /config/peer*/*.conf 2>/dev/null); then
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CLIENT_IP="${PROPOSED_IP}"
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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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$(sed '/PresharedKey/d' "/config/templates/peer.conf")
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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 = ${CLIENT_IP}/32,${!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 = ${CLIENT_IP}/32
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DUDE
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fi
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# add PersistentKeepalive if the peer is specified
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if [[ -n "${PERSISTENTKEEPALIVE_PEERS_ARRAY}" ]] && ([[ "${PERSISTENTKEEPALIVE_PEERS_ARRAY[0]}" = "all" ]] || printf '%s\0' "${PERSISTENTKEEPALIVE_PEERS_ARRAY[@]}" | grep -Fxqz -- "${i}"); then
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cat <<DUDE >> /config/wg0.conf
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PersistentKeepalive = 25
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DUDE
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else
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cat <<DUDE >> /config/wg0.conf
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DUDE
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fi
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if [[ -z "${LOG_CONFS}" ]] || [[ "${LOG_CONFS}" = "true" ]]; then
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echo "PEER ${i} QR code (conf file is saved under /config/${PEER_ID}):"
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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="$INTERFACE"
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ORIG_ALLOWEDIPS="$ALLOWEDIPS"
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ORIG_PERSISTENTKEEPALIVE_PEERS="$PERSISTENTKEEPALIVE_PEERS"
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DUDE
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}
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if [[ -n "$PEERS" ]]; then
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echo "**** Server mode is selected ****"
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if [[ "$PEERS" =~ ^[0-9]+$ ]] && ! [[ "$PEERS" = *,* ]]; then
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mapfile -t PEERS_ARRAY < <(seq 1 "${PEERS}")
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else
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mapfile -t PEERS_ARRAY < <(echo "${PEERS}" | tr ',' '\n')
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fi
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if [[ -n "${PERSISTENTKEEPALIVE_PEERS}" ]]; then
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echo "**** PersistentKeepalive will be set for: ${PERSISTENTKEEPALIVE_PEERS/,/ } ****"
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mapfile -t PERSISTENTKEEPALIVE_PEERS_ARRAY < <(echo "${PERSISTENTKEEPALIVE_PEERS}" | tr ',' '\n')
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fi
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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 ${SERVERPORT}. Make sure that port is properly forwarded to port 51820 inside this container ****"
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INTERNAL_SUBNET=${INTERNAL_SUBNET:-10.13.13.0}
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echo "**** Internal subnet is set to $INTERNAL_SUBNET ****"
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INTERFACE=$(echo "$INTERNAL_SUBNET" | awk 'BEGIN{FS=OFS="."} NF--')
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ALLOWEDIPS=${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}.1"
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echo "**** PEERDNS var is either not set or is set to \"auto\", setting peer DNS to ${INTERFACE}.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 ${PEERS} peer/client confs ****"
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generate_confs
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save_vars
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else
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echo "**** Server mode is selected ****"
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if [[ -f /config/.donoteditthisfile ]]; then
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. /config/.donoteditthisfile
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fi
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if [[ "$SERVERURL" != "$ORIG_SERVERURL" ]] || [[ "$SERVERPORT" != "$ORIG_SERVERPORT" ]] || [[ "$PEERDNS" != "$ORIG_PEERDNS" ]] || [[ "$PEERS" != "$ORIG_PEERS" ]] || [[ "$INTERFACE" != "$ORIG_INTERFACE" ]] || [[ "$ALLOWEDIPS" != "$ORIG_ALLOWEDIPS" ]] || [[ "$PERSISTENTKEEPALIVE_PEERS" != "$ORIG_PERSISTENTKEEPALIVE_PEERS" ]]; then
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echo "**** Server related environment variables changed, regenerating 1 server and ${PEERS} peer/client confs ****"
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generate_confs
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save_vars
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else
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echo "**** No changes to parameters. Existing configs are used. ****"
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fi
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fi
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else
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echo "**** Client mode selected. ****"
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USE_COREDNS="${USE_COREDNS,,}"
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printf %s "${USE_COREDNS:-false}" > /run/s6/container_environment/USE_COREDNS
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fi
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# set up CoreDNS
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if [[ ! -f /config/coredns/Corefile ]]; then
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cp /defaults/Corefile /config/coredns/Corefile
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fi
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# permissions
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lsiown -R abc:abc \
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/config
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