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wg-quick: allow specifiying multiple hooks

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2017-10-25 21:55:17 +02:00
parent b1dd8d711e
commit 17f9548182
2 changed files with 21 additions and 18 deletions
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3
src/wg-quick.8
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@ -80,7 +80,8 @@ PreUp, PostUp, PreDown, PostDown \(em script snippets which will be executed by
.BR bash (1)
before/after setting up/tearing down the interface, most commonly used
to configure custom DNS options or firewall rules. The special string `%i'
is expanded to \fIINTERFACE\fP.
is expanded to \fIINTERFACE\fP. Each one may be specified multiple times, in which case
the commands are executed in order.
.IP \(bu
SaveConfig \(em if set to `true', the configuration is saved from the current state of the
interface upon shutdown.

32
src/wg-quick.bash
View file

@ -15,10 +15,10 @@ INTERFACE=""
ADDRESSES=( )
MTU=""
DNS=( )
PRE_UP=""
POST_UP=""
PRE_DOWN=""
POST_DOWN=""
PRE_UP=( )
POST_UP=( )
PRE_DOWN=( )
POST_DOWN=( )
SAVE_CONFIG=0
CONFIG_FILE=""
PROGRAM="${0##*/}"
@ -43,10 +43,10 @@ parse_options() {
Address) ADDRESSES+=( ${value//,/ } ); continue ;;
MTU) MTU="$value"; continue ;;
DNS) DNS+=( ${value//,/ } ); continue ;;
PreUp) PRE_UP="$value"; continue ;;
PreDown) PRE_DOWN="$value"; continue ;;
PostUp) POST_UP="$value"; continue ;;
PostDown) POST_DOWN="$value"; continue ;;
PreUp) PRE_UP+=( "$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
@ -197,11 +197,13 @@ save_config() {
umask "$old_umask"
}
execute_hook() {
[[ -n $1 ]] || return 0
local hook="${1//%i/$INTERFACE}"
execute_hooks() {
local hook
for hook in "$@"; do
hook="${hook//%i/$INTERFACE}"
echo "[#] $hook" >&2
(eval "$hook")
done
}
cmd_usage() {
@ -232,7 +234,7 @@ cmd_up() {
local i
[[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists"
trap 'del_if; exit' INT TERM EXIT
execute_hook "$PRE_UP"
execute_hooks "${PRE_UP[@]}"
add_if
set_config
for i in "${ADDRESSES[@]}"; do
@ -244,17 +246,17 @@ cmd_up() {
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
[[ $(ip route get "$i" 2>/dev/null) == *dev\ $INTERFACE\ * ]] || add_route "$i"
done
execute_hook "$POST_UP"
execute_hooks "${POST_UP[@]}"
trap - INT TERM EXIT
}
cmd_down() {
[[ " $(wg show interfaces) " == *" $INTERFACE "* ]] || die "\`$INTERFACE' is not a WireGuard interface"
execute_hook "$PRE_DOWN"
execute_hooks "${PRE_DOWN[@]}"
[[ $SAVE_CONFIG -eq 0 ]] || save_config
unset_dns
del_if
execute_hook "$POST_DOWN"
execute_hooks "${POST_DOWN[@]}"
}
if [[ $# -eq 1 && ( $1 == --help || $1 == -h || $1 == help ) ]]; then