--- /dev/null
+#!/usr/local/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+#
+
+# The shebang is in /usr/local because this requires bash 4.
+
+set -e -o pipefail
+shopt -s extglob
+export LC_ALL=C
+
+SELF="${BASH_SOURCE[0]}"
+SELF="$(cd "${SELF%/*}" && pwd -P)/${SELF##*/}"
+export PATH="${SELF%/*}:$PATH"
+
+WG_CONFIG=""
+INTERFACE=""
+ADDRESSES=( )
+MTU=""
+DNS=( )
+TABLE=""
+PRE_UP=( )
+POST_UP=( )
+PRE_DOWN=( )
+POST_DOWN=( )
+SAVE_CONFIG=0
+CONFIG_FILE=""
+PROGRAM="${0##*/}"
+ARGS=( "$@" )
+
+parse_options() {
+ local interface_section=0 line key value stripped
+ CONFIG_FILE="$1"
+ [[ $CONFIG_FILE =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]] && CONFIG_FILE="/etc/wireguard/$CONFIG_FILE.conf"
+ [[ -e $CONFIG_FILE ]] || die "\`$CONFIG_FILE' does not exist"
+ [[ $CONFIG_FILE =~ (^|/)([a-zA-Z0-9_=+.-]{1,15})\.conf$ ]] || die "The config file must be a valid interface name, followed by .conf"
+ CONFIG_FILE="$(cd "${CONFIG_FILE%/*}" && pwd -P)/${CONFIG_FILE##*/}"
+ ((($(stat -f '0%#p' "$CONFIG_FILE") & $(stat -f '0%#p' "${CONFIG_FILE%/*}") & 0007) == 0)) || echo "Warning: \`$CONFIG_FILE' is world accessible" >&2
+ INTERFACE="${BASH_REMATCH[2]}"
+ shopt -s nocasematch
+ while read -r line || [[ -n $line ]]; do
+ stripped="${line%%\#*}"
+ key="${stripped%%=*}"; key="${key##*([[:space:]])}"; key="${key%%*([[:space:]])}"
+ value="${stripped#*=}"; value="${value##*([[:space:]])}"; value="${value%%*([[:space:]])}"
+ [[ $key == "["* ]] && interface_section=0
+ [[ $key == "[Interface]" ]] && interface_section=1
+ if [[ $interface_section -eq 1 ]]; then
+ case "$key" in
+ Address) ADDRESSES+=( ${value//,/ } ); continue ;;
+ MTU) MTU="$value"; continue ;;
+ DNS) DNS+=( ${value//,/ } ); continue ;;
+ Table) TABLE="$value"; continue ;;
+ PreUp) PRE_UP+=( "$value" ); continue ;;
+ PreDown) PRE_DOWN+=( "$value" ); continue ;;
+ PostUp) POST_UP+=( "$value" ); continue ;;
+ PostDown) POST_DOWN+=( "$value" ); continue ;;
+ SaveConfig) read_bool SAVE_CONFIG "$value"; continue ;;
+ esac
+ fi
+ WG_CONFIG+="$line"$'\n'
+ done < "$CONFIG_FILE"
+ shopt -u nocasematch
+}
+
+read_bool() {
+ case "$2" in
+ true) printf -v "$1" 1 ;;
+ false) printf -v "$1" 0 ;;
+ *) die "\`$2' is neither true nor false"
+ esac
+}
+
+cmd() {
+ echo "[#] $*" >&2
+ "$@"
+}
+
+die() {
+ echo "$PROGRAM: $*" >&2
+ exit 1
+}
+
+auto_su() {
+ [[ $UID == 0 ]] || exec sudo -p "$PROGRAM must be run as root. Please enter the password for %u to continue: " "$SELF" "${ARGS[@]}"
+}
+
+get_real_interface() {
+ local interface diff
+ wg show interfaces >/dev/null
+ [[ -f "/var/run/wireguard/$INTERFACE.name" ]] || return 1
+ interface="$(< "/var/run/wireguard/$INTERFACE.name")"
+ [[ -n $interface && -S "/var/run/wireguard/$interface.sock" ]] || return 1
+ diff=$(( $(stat -f %m "/var/run/wireguard/$interface.sock" 2>/dev/null || echo 200) - $(stat -f %m "/var/run/wireguard/$INTERFACE.name" 2>/dev/null || echo 100) ))
+ [[ $diff -ge 2 || $diff -le -2 ]] && return 1
+ REAL_INTERFACE="$interface"
+ echo "[+] Interface for $INTERFACE is $REAL_INTERFACE" >&2
+ return 0
+}
+
+add_if() {
+ export WG_DARWIN_UTUN_NAME_FILE="/var/run/wireguard/$INTERFACE.name"
+ cmd wireguard-go utun
+ local i
+ for i in {1..30}; do
+ [[ -f "/var/run/wireguard/$INTERFACE.name" ]] && break
+ sleep 0.1
+ done
+ get_real_interface
+}
+
+del_routes() {
+ local todelete=( ) destination netif
+ while read -r destination _ _ _ _ netif _; do
+ [[ $netif == "$REAL_INTERFACE" ]] && todelete+=( "$destination" )
+ done < <(netstat -nr -f inet)
+ for destination in "${todelete[@]}"; do
+ cmd route -q delete -inet "$destination" >/dev/null || true
+ done
+ todelete=( )
+ while read -r destination _ _ netif; do
+ [[ $netif == "$REAL_INTERFACE" ]] && todelete+=( "$destination" )
+ done < <(netstat -nr -f inet6)
+ for destination in "${todelete[@]}"; do
+ cmd route -q delete -inet6 "$destination" >/dev/null || true
+ done
+ for destination in "${ENDPOINTS[@]}"; do
+ if [[ $destination == *:* ]]; then
+ cmd route -q delete -inet6 "$destination" >/dev/null || true
+ else
+ cmd route -q delete -inet "$destination" >/dev/null || true
+ fi
+ done
+}
+
+del_if() {
+ [[ -z $REAL_INTERFACE ]] || cmd rm -f "/var/run/wireguard/$REAL_INTERFACE.sock"
+ cmd rm -f "/var/run/wireguard/$INTERFACE.name"
+}
+
+up_if() {
+ cmd ifconfig "$REAL_INTERFACE" up
+}
+
+add_addr() {
+ if [[ $1 == *:* ]]; then
+ cmd ifconfig "$REAL_INTERFACE" inet6 "$1"
+ else
+ cmd ifconfig "$REAL_INTERFACE" inet "$1" "${1%%/*}"
+ fi
+}
+
+set_mtu() {
+ local mtu=0 current_mtu=-1 destination netif defaultif
+ if [[ -n $MTU ]]; then
+ cmd ifconfig "$REAL_INTERFACE" mtu "$MTU"
+ return
+ fi
+ while read -r destination _ _ _ _ netif _; do
+ if [[ $destination == default ]]; then
+ defaultif="$netif"
+ break
+ fi
+ done < <(netstat -nr -f inet)
+ [[ -n $defaultif && $(ifconfig "$defaultif") =~ mtu\ ([0-9]+) ]] && mtu="${BASH_REMATCH[1]}"
+ [[ $mtu -gt 0 ]] || mtu=1500
+ mtu=$(( mtu - 80 ))
+ [[ $(ifconfig "$REAL_INTERFACE") =~ mtu\ ([0-9]+) ]] && current_mtu="${BASH_REMATCH[1]}"
+ [[ $mtu -eq $current_mtu ]] || cmd ifconfig "$REAL_INTERFACE" mtu "$mtu"
+}
+
+collect_gateways() {
+ local destination gateway
+
+ GATEWAY4=""
+ while read -r destination gateway _; do
+ [[ $destination == default ]] || continue
+ GATEWAY4="$gateway"
+ break
+ done < <(netstat -nr -f inet)
+
+ GATEWAY6=""
+ while read -r destination gateway _; do
+ [[ $destination == default ]] || continue
+ [[ $gateway == fe80:* ]] && continue
+ GATEWAY6="$gateway"
+ break
+ done < <(netstat -nr -f inet6)
+}
+
+collect_endpoints() {
+ ENDPOINTS=( )
+ while read -r _ endpoint; do
+ [[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
+ ENDPOINTS+=( "${BASH_REMATCH[1]}" )
+ done < <(wg show "$REAL_INTERFACE" endpoints)
+}
+
+set_endpoint_direct_route() {
+ local old_endpoints endpoint old_gateway4 old_gateway6 remove_all_old=0 added=( )
+ old_endpoints=( "${ENDPOINTS[@]}" )
+ old_gateway4="$GATEWAY4"
+ old_gateway6="$GATEWAY6"
+ collect_gateways
+ collect_endpoints
+
+ [[ $old_gateway4 != "$GATEWAY4" || $old_gateway6 != "$GATEWAY6" ]] && remove_all_old=1
+
+ if [[ $remove_all_old -eq 1 ]]; then
+ for endpoint in "${ENDPOINTS[@]}"; do
+ [[ " ${old_endpoints[*]} " == *"$endpoint"* ]] || old_endpoints+=( "$endpoint" )
+ done
+ fi
+
+ for endpoint in "${old_endpoints[@]}"; do
+ [[ $remove_all_old -eq 0 && " ${ENDPOINTS[*]} " == *"$endpoint"* ]] && continue
+ if [[ $endpoint == *:* ]]; then
+ cmd route -q delete -inet6 "$endpoint" >/dev/null 2>&1 || true
+ else
+ cmd route -q delete -inet "$endpoint" >/dev/null 2>&1 || true
+ fi
+ done
+
+ for endpoint in "${ENDPOINTS[@]}"; do
+ if [[ $remove_all_old -eq 0 && " ${old_endpoints[*]} " == *"$endpoint"* ]]; then
+ added+=( "$endpoint" )
+ continue
+ fi
+ if [[ $endpoint == *:* && -n $GATEWAY6 ]]; then
+ cmd route -q add -inet6 "$endpoint" -gateway "$GATEWAY6" >/dev/null || true
+ added+=( "$endpoint" )
+ elif [[ -n $GATEWAY4 ]]; then
+ cmd route -q add -inet "$endpoint" -gateway "$GATEWAY4" >/dev/null || true
+ added+=( "$endpoint" )
+ fi
+ done
+ ENDPOINTS=( "${added[@]}" )
+}
+
+set_dns() {
+ # TODO: this should use scutil and be slightly more clever. But for now
+ # we simply overwrite any _manually set_ DNS servers for all network
+ # services. This means we get into trouble if the user doesn't actually
+ # want DNS via DHCP when setting this back to "empty". Because macOS is
+ # so horrible to deal with here, we'll simply wait for irate users to
+ # provide a patch themselves.
+
+ local service response
+
+ { read -r _; while read -r service; do
+ [[ $service == "*"* ]] && service="${service:1}"
+ while read -r response; do
+ [[ $response == *Error* ]] && echo "$response" >&2
+ done < <(cmd networksetup -setdnsservers "$service" "${DNS[@]}")
+ done; } < <(networksetup -listallnetworkservices)
+}
+
+del_dns() {
+ { read -r _; while read -r service; do
+ [[ $service == "*"* ]] && service="${service:1}"
+ while read -r response; do
+ [[ $response == *Error* ]] && echo "$response" >&2
+ done < <(cmd networksetup -setdnsservers "$service" Empty)
+ done; } < <(networksetup -listallnetworkservices)
+}
+
+monitor_daemon() {
+ echo "[+] Backgrounding route monitor" >&2
+ (trap 'del_routes; del_dns; exit 0' INT TERM EXIT
+ exec 1>&- 2>&-
+ local event
+ # TODO: this should also check to see if the endpoint actually changes
+ # in response to incoming packets, and then call set_endpoint_direct_route
+ # then too. That function should be able to gracefully cleanup if the
+ # endpoints change.
+ while read -r event; do
+ [[ $event == RTM_* ]] || continue
+ ifconfig "$REAL_INTERFACE" >/dev/null 2>&1 || break
+ [[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route
+ [[ -z $MTU ]] && set_mtu
+ [[ ${#DNS[@]} -gt 0 ]] && set_dns
+ done < <(route -n monitor)) & disown
+}
+
+add_route() {
+ [[ $TABLE != off ]] || return 0
+
+ local family=inet
+ [[ $1 == *:* ]] && family=inet6
+
+ if [[ $1 == */0 && ( -z $TABLE || $TABLE == auto ) ]]; then
+ if [[ $1 == *:* ]]; then
+ AUTO_ROUTE6=1
+ cmd route -q add -inet6 ::/1 -interface "$REAL_INTERFACE" >/dev/null
+ cmd route -q add -inet6 8000::/1 -interface "$REAL_INTERFACE" >/dev/null
+ else
+ AUTO_ROUTE4=1
+ cmd route -q add -inet 0.0.0.0/1 -interface "$REAL_INTERFACE" >/dev/null
+ cmd route -q add -inet 128.0.0.0/1 -interface "$REAL_INTERFACE" >/dev/null
+ fi
+ else
+ [[ $TABLE == main || $TABLE == auto || -z $TABLE ]] || die "Darwin only supports TABLE=auto|main|off"
+ cmd route -q add "-$family" "$1" -interface "$REAL_INTERFACE" >/dev/null
+ fi
+}
+
+set_config() {
+ cmd wg setconf "$REAL_INTERFACE" <(echo "$WG_CONFIG")
+}
+
+save_config() {
+ local old_umask new_config current_config address cmd
+ new_config=$'[Interface]\n'
+ for address in "${ADDRESSES[@]}"; do
+ new_config+="Address = $address"$'\n'
+ done
+ for address in "${DNS[@]}"; do
+ new_config+="DNS = $address"$'\n'
+ done
+ [[ -n $MTU ]] && new_config+="MTU = $MTU"$'\n'
+ [[ -n $TABLE ]] && new_config+="Table = $TABLE"$'\n'
+ [[ $SAVE_CONFIG -eq 0 ]] || new_config+=$'SaveConfig = true\n'
+ for cmd in "${PRE_UP[@]}"; do
+ new_config+="PreUp = $cmd"$'\n'
+ done
+ for cmd in "${POST_UP[@]}"; do
+ new_config+="PostUp = $cmd"$'\n'
+ done
+ for cmd in "${PRE_DOWN[@]}"; do
+ new_config+="PreDown = $cmd"$'\n'
+ done
+ for cmd in "${POST_DOWN[@]}"; do
+ new_config+="PostDown = $cmd"$'\n'
+ done
+ old_umask="$(umask)"
+ umask 077
+ current_config="$(cmd wg showconf "$REAL_INTERFACE")"
+ trap 'rm -f "$CONFIG_FILE.tmp"; exit' INT TERM EXIT
+ echo "${current_config/\[Interface\]$'\n'/$new_config}" > "$CONFIG_FILE.tmp" || die "Could not write configuration file"
+ sync "$CONFIG_FILE.tmp"
+ mv "$CONFIG_FILE.tmp" "$CONFIG_FILE" || die "Could not move configuration file"
+ trap - INT TERM EXIT
+ umask "$old_umask"
+}
+
+execute_hooks() {
+ local hook
+ for hook in "$@"; do
+ hook="${hook//%i/$REAL_INTERFACE}"
+ hook="${hook//%I/$INTERFACE}"
+ echo "[#] $hook" >&2
+ (eval "$hook")
+ done
+}
+
+cmd_usage() {
+ cat >&2 <<-_EOF
+ Usage: $PROGRAM [ up | down | save ] [ CONFIG_FILE | INTERFACE ]
+
+ CONFIG_FILE is a configuration file, whose filename is the interface name
+ followed by \`.conf'. Otherwise, INTERFACE is an interface name, with
+ configuration found at /etc/wireguard/INTERFACE.conf. It is to be readable
+ by wg(8)'s \`setconf' sub-command, with the exception of the following additions
+ to the [Interface] section, which are handled by $PROGRAM:
+
+ - Address: may be specified one or more times and contains one or more
+ IP addresses (with an optional CIDR mask) to be set for the interface.
+ - DNS: an optional DNS server to use while the device is up.
+ - MTU: an optional MTU for the interface; if unspecified, auto-calculated.
+ - Table: an optional routing table to which routes will be added; if
+ unspecified or \`auto', the default table is used. If \`off', no routes
+ are added. Besides \`auto' and \`off', only \`main' is supported on
+ this platform.
+ - PreUp, PostUp, PreDown, PostDown: script snippets which will be executed
+ by bash(1) at the corresponding phases of the link, most commonly used
+ to configure DNS. The string \`%i' is expanded to INTERFACE.
+ - SaveConfig: if set to \`true', the configuration is saved from the current
+ state of the interface upon shutdown.
+
+ See wg-quick(8) for more info and examples.
+ _EOF
+}
+
+cmd_up() {
+ local i
+ get_real_interface && die "\`$INTERFACE' already exists as \`$REAL_INTERFACE'"
+ trap 'del_if; del_routes; exit' INT TERM EXIT
+ execute_hooks "${PRE_UP[@]}"
+ add_if
+ set_config
+ for i in "${ADDRESSES[@]}"; do
+ add_addr "$i"
+ done
+ set_mtu
+ up_if
+ for i in $(while read -r _ i; do for i in $i; do [[ $i =~ ^[0-9a-z:.]+/[0-9]+$ ]] && echo "$i"; done; done < <(wg show "$REAL_INTERFACE" allowed-ips)); do
+ add_route "$i"
+ done
+ [[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route
+ [[ ${#DNS[@]} -gt 0 ]] && set_dns
+ monitor_daemon
+ execute_hooks "${POST_UP[@]}"
+ trap - INT TERM EXIT
+}
+
+cmd_down() {
+ if ! get_real_interface || [[ " $(wg show interfaces) " != *" $REAL_INTERFACE "* ]]; then
+ die "\`$INTERFACE' is not a WireGuard interface"
+ fi
+ execute_hooks "${PRE_DOWN[@]}"
+ [[ $SAVE_CONFIG -eq 0 ]] || save_config
+ del_if
+ execute_hooks "${POST_DOWN[@]}"
+}
+
+cmd_save() {
+ if ! get_real_interface || [[ " $(wg show interfaces) " != *" $REAL_INTERFACE "* ]]; then
+ die "\`$INTERFACE' is not a WireGuard interface"
+ fi
+ save_config
+}
+
+# ~~ function override insertion point ~~
+
+if [[ $# -eq 1 && ( $1 == --help || $1 == -h || $1 == help ) ]]; then
+ cmd_usage
+elif [[ $# -eq 2 && $1 == up ]]; then
+ auto_su
+ parse_options "$2"
+ cmd_up
+elif [[ $# -eq 2 && $1 == down ]]; then
+ auto_su
+ parse_options "$2"
+ cmd_down
+elif [[ $# -eq 2 && $1 == save ]]; then
+ auto_su
+ parse_options "$2"
+ cmd_save
+else
+ cmd_usage
+ exit 1
+fi
+
+exit 0
projects / thirdparty / wireguard-tools.git / commitdiff
