diff --git a/src/wg-quick/darwin.bash b/src/wg-quick/darwin.bash index 566cfea..17cf2b8 100755 --- a/src/wg-quick/darwin.bash +++ b/src/wg-quick/darwin.bash @@ -113,20 +113,20 @@ del_routes() { [[ $netif == "$REAL_INTERFACE" ]] && todelete+=( "$destination" ) done < <(netstat -nr -f inet) for destination in "${todelete[@]}"; do - cmd route -q delete -inet "$destination" >/dev/null || true + cmd route -q -n delete -inet "$destination" >/dev/null || true done todelete=( ) while read -r destination gateway _ netif; do [[ $netif == "$REAL_INTERFACE" || ( $netif == lo* && $gateway == "$REAL_INTERFACE" ) ]] && todelete+=( "$destination" ) done < <(netstat -nr -f inet6) for destination in "${todelete[@]}"; do - cmd route -q delete -inet6 "$destination" >/dev/null || true + cmd route -q -n delete -inet6 "$destination" >/dev/null || true done for destination in "${ENDPOINTS[@]}"; do if [[ $destination == *:* ]]; then - cmd route -q delete -inet6 "$destination" >/dev/null || true + cmd route -q -n delete -inet6 "$destination" >/dev/null || true else - cmd route -q delete -inet "$destination" >/dev/null || true + cmd route -q -n delete -inet "$destination" >/dev/null || true fi done } @@ -149,6 +149,7 @@ add_addr() { } set_mtu() { + # TODO: use better set_mtu algorithm from freebsd.bash local mtu=0 current_mtu=-1 destination netif defaultif if [[ -n $MTU ]]; then cmd ifconfig "$REAL_INTERFACE" mtu "$MTU" @@ -231,9 +232,9 @@ set_endpoint_direct_route() { for endpoint in "${old_endpoints[@]}"; do [[ $remove_all_old -eq 0 && " ${ENDPOINTS[*]} " == *" $endpoint "* ]] && continue if [[ $endpoint == *:* && $AUTO_ROUTE6 -eq 1 ]]; then - cmd route -q delete -inet6 "$endpoint" >/dev/null 2>&1 || true + cmd route -q -n delete -inet6 "$endpoint" >/dev/null 2>&1 || true elif [[ $AUTO_ROUTE4 -eq 1 ]]; then - cmd route -q delete -inet "$endpoint" >/dev/null 2>&1 || true + cmd route -q -n delete -inet "$endpoint" >/dev/null 2>&1 || true fi done @@ -244,18 +245,18 @@ set_endpoint_direct_route() { fi if [[ $endpoint == *:* && $AUTO_ROUTE6 -eq 1 ]]; then if [[ -n $GATEWAY6 ]]; then - cmd route -q add -inet6 "$endpoint" -gateway "$GATEWAY6" >/dev/null || true + cmd route -q -n add -inet6 "$endpoint" -gateway "$GATEWAY6" >/dev/null || true else # Prevent routing loop - cmd route -q add -inet6 "$endpoint" ::1 -blackhole >/dev/null || true + cmd route -q -n add -inet6 "$endpoint" ::1 -blackhole >/dev/null || true fi added+=( "$endpoint" ) elif [[ $AUTO_ROUTE4 -eq 1 ]]; then if [[ -n $GATEWAY4 ]]; then - cmd route -q add -inet "$endpoint" -gateway "$GATEWAY4" >/dev/null || true + cmd route -q -n add -inet "$endpoint" -gateway "$GATEWAY4" >/dev/null || true else # Prevent routing loop - cmd route -q add -inet "$endpoint" 127.0.0.1 -blackhole >/dev/null || true + cmd route -q -n add -inet "$endpoint" 127.0.0.1 -blackhole >/dev/null || true fi added+=( "$endpoint" ) fi @@ -309,16 +310,17 @@ add_route() { 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 "$REAL_INTERFACE" >/dev/null + cmd route -q -n add -inet6 ::/1 -interface "$REAL_INTERFACE" >/dev/null + cmd route -q -n 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 "$REAL_INTERFACE" >/dev/null + cmd route -q -n add -inet 0.0.0.0/1 -interface "$REAL_INTERFACE" >/dev/null + cmd route -q -n 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 + [[ $(route -n get "-$family" "$1" 2>/dev/null) =~ interface:\ $REAL_INTERFACE$'\n' ]] || cmd route -q -n add -$family "$1" -interface "$REAL_INTERFACE" >/dev/null + fi } @@ -327,6 +329,7 @@ set_config() { } save_config() { + # TODO: actually save addresses and DNS by running ifconfig and networksetup local old_umask new_config current_config address cmd new_config=$'[Interface]\n' for address in "${ADDRESSES[@]}"; do @@ -411,7 +414,7 @@ cmd_up() { 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 + 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) | sort -nr -k 2 -t /); do add_route "$i" done [[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route diff --git a/src/wg-quick/freebsd.bash b/src/wg-quick/freebsd.bash new file mode 100755 index 0000000..6d698e2 --- /dev/null +++ b/src/wg-quick/freebsd.bash @@ -0,0 +1,415 @@ +#!/usr/local/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2015-2018 Jason A. Donenfeld . All Rights Reserved. +# + +# TODO: Are bash process subsitutions acceptable in FreeBSD, or do they create insecure temporary files? + +set -e -o pipefail +shopt -s extglob +export LC_ALL=C + +SELF="$(readlink -f "${BASH_SOURCE[0]}")" +export PATH="${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=( "$@" ) + +cmd() { + echo "[#] $*" >&2 + "$@" +} + +die() { + echo "$PROGRAM: $*" >&2 + exit 1 +} + +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="$(readlink -f "$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 +} + +auto_su() { + [[ $UID == 0 ]] || exec sudo -p "$PROGRAM must be run as root. Please enter the password for %u to continue: " -- "$BASH" -- "$SELF" "${ARGS[@]}" +} + +add_if() { + cmd "${WG_QUICK_USERSPACE_IMPLEMENTATION:-wireguard-go}" "$INTERFACE" +} + +del_routes() { + local todelete=( ) destination gateway netif + while read -r destination _ _ _ _ netif _; do + [[ $netif == "$INTERFACE" ]] && todelete+=( "$destination" ) + done < <(netstat -nr -f inet) + for destination in "${todelete[@]}"; do + cmd route -q -n delete -inet "$destination" || true + done + todelete=( ) + while read -r destination gateway _ netif; do + [[ $netif == "$INTERFACE" || ( $netif == lo* && $gateway == "$INTERFACE" ) ]] && todelete+=( "$destination" ) + done < <(netstat -nr -f inet6) + for destination in "${todelete[@]}"; do + cmd route -q -n delete -inet6 "$destination" || true + done + for destination in "${ENDPOINTS[@]}"; do + if [[ $destination == *:* ]]; then + cmd route -q -n delete -inet6 "$destination" || true + else + cmd route -q -n delete -inet "$destination" || true + fi + done +} + +del_if() { + [[ $HAVE_SET_DNS -eq 0 ]] || unset_dns + cmd rm -f "/var/run/wireguard/$INTERFACE.sock" +} + +up_if() { + cmd ifconfig "$INTERFACE" up +} + +add_addr() { + local family=inet + [[ $1 == *:* ]] && family=inet6 + cmd ifconfig "$INTERFACE" "$family" "$1" alias +} + +set_mtu() { + local mtu=0 endpoint output family + if [[ -n $MTU ]]; then + cmd ifconfig "$INTERFACE" mtu "$MTU" + return + fi + while read -r _ endpoint; do + [[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue + family=inet + [[ ${BASH_REMATCH[1]} == *:* ]] && family=inet6 + output="$(route -n get "-$family" "${BASH_REMATCH[1]}" || true)" + [[ $output =~ interface:\ ([^ ]+)$'\n' && $(ifconfig "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}" + done < <(wg show "$INTERFACE" endpoints) + if [[ $mtu -eq 0 ]]; then + read -r output < <(route -n get default || true) || true + [[ $output =~ interface:\ ([^ ]+)$'\n' && $(ifconfig "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}" + fi + [[ $mtu -gt 0 ]] || mtu=1500 + cmd ifconfig "$INTERFACE" mtu $(( mtu - 80 )) +} + + +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+=( "${BASH_REMATCH[1]}" ) + done < <(wg show "$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 == *:* && $AUTO_ROUTE6 -eq 1 ]]; then + cmd route -q -n delete -inet6 "$endpoint" 2>/dev/null || true + elif [[ $AUTO_ROUTE4 -eq 1 ]]; then + cmd route -q -n delete -inet "$endpoint" 2>/dev/null || true + fi + done + + for endpoint in "${ENDPOINTS[@]}"; do + if [[ $remove_all_old -eq 0 && " ${old_endpoints[*]} " == *" $endpoint "* ]]; then + added+=( "$endpoint" ) + continue + fi + if [[ $endpoint == *:* && $AUTO_ROUTE6 -eq 1 ]]; then + if [[ -n $GATEWAY6 ]]; then + cmd route -q -n add -inet6 "$endpoint" -gateway "$GATEWAY6" || true + else + # Prevent routing loop + cmd route -q -n add -inet6 "$endpoint" ::1 -blackhole || true + fi + added+=( "$endpoint" ) + elif [[ $AUTO_ROUTE4 -eq 1 ]]; then + if [[ -n $GATEWAY4 ]]; then + cmd route -q -n add -inet "$endpoint" -gateway "$GATEWAY4" || true + else + # Prevent routing loop + cmd route -q -n add -inet "$endpoint" 127.0.0.1 -blackhole || true + fi + added+=( "$endpoint" ) + fi + done + ENDPOINTS=( "${added[@]}" ) +} + +monitor_daemon() { + echo "[+] Backgrounding route monitor" >&2 + (trap 'del_routes; exit 0' INT TERM EXIT + exec >/dev/null 2>&1 + 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 + [[ $event == RTM_* ]] || continue + ifconfig "$INTERFACE" >/dev/null 2>&1 || break + [[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route + # TODO: set the mtu as well, but only if up + done < <(route -n monitor)) & disown +} + +HAVE_SET_DNS=0 +set_dns() { + [[ ${#DNS[@]} -gt 0 ]] || return 0 + printf 'nameserver %s\n' "${DNS[@]}" | cmd resolvconf -a "$INTERFACE" -x + HAVE_SET_DNS=1 +} + +unset_dns() { + [[ ${#DNS[@]} -gt 0 ]] || return 0 + cmd resolvconf -d "$INTERFACE" +} + +add_route() { + [[ $TABLE != off ]] || return 0 + + local family=inet + [[ $1 == *:* ]] && family=inet6 + + if [[ -n $TABLE && $TABLE != auto ]]; then + cmd route -q -n add "-$family" -fib "$TABLE" "$1" -interface "$INTERFACE" + elif [[ $1 == */0 ]]; then + if [[ $1 == *:* ]]; then + AUTO_ROUTE6=1 + cmd route -q -n add -inet6 ::/1 -interface "$INTERFACE" + cmd route -q -n add -inet6 8000::/1 -interface "$INTERFACE" + else + AUTO_ROUTE4=1 + cmd route -q -n add -inet 0.0.0.0/1 -interface "$INTERFACE" + cmd route -q -n add -inet 128.0.0.0/1 -interface "$INTERFACE" + fi + else + [[ $(route -n get "-$family" "$1" 2>/dev/null) =~ interface:\ $INTERFACE$'\n' ]] || cmd route -q -n add "-$family" "$1" -interface "$INTERFACE" + fi +} + +set_config() { + cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG") +} + +save_config() { + # TODO: actually save addresses by running ifconfig + local old_umask new_config current_config address cmd + new_config=$'[Interface]\n' + for address in "${ADDRESSES[@]}"; do + new_config+="Address = $address"$'\n' + done + while read -r address; do + [[ $address =~ ^nameserver\ ([a-zA-Z0-9_=+:%.-]+)$ ]] && new_config+="DNS = ${BASH_REMATCH[1]}"$'\n' + done < <(resolvconf -l "$INTERFACE" 2>/dev/null) + [[ -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 "$INTERFACE")" + trap 'rm -f "$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="${hook//%i/$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. + - 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 + [[ -z $(ifconfig "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists" + trap 'del_if; del_routes; exit' INT TERM EXIT + execute_hooks "${PRE_UP[@]}" + add_if + set_config + for i in "${ADDRESSES[@]}"; do + add_addr "$i" + done + set_mtu + up_if + set_dns + for i in $(while read -r _ i; do for i in $i; do [[ $i =~ ^[0-9a-z:.]+/[0-9]+$ ]] && echo "$i"; done; done < <(wg show "$INTERFACE" allowed-ips) | sort -nr -k 2 -t /); do + add_route "$i" + done + [[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route + monitor_daemon + execute_hooks "${POST_UP[@]}" + trap - INT TERM EXIT +} + +cmd_down() { + [[ " $(wg show interfaces) " == *" $INTERFACE "* ]] || die "\`$INTERFACE' is not a WireGuard interface" + execute_hooks "${PRE_DOWN[@]}" + [[ $SAVE_CONFIG -eq 0 ]] || save_config + del_if + unset_dns + execute_hooks "${POST_DOWN[@]}" +} + +cmd_save() { + [[ " $(wg show interfaces) " == *" $INTERFACE "* ]] || die "\`$INTERFACE' is not a WireGuard interface" + 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