wg-quick: add darwin implementation
It's pretty rough and leaves much to be desired, but it works. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
parent
5d9433d73f
commit
a5412d1056
444
src/wg-quick/darwin.bash
Executable file
444
src/wg-quick/darwin.bash
Executable file
|
|
@ -0,0 +1,444 @@
|
|||
#!/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
|
||||
Loading…
Reference in a new issue