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wg-quick: openbsd: no use for userspace support 

With alignment between the kernel and userspace, along with userspace
packages, we can now rely on the kernel in the future always having
wg(4).

This also simplifies the interface selection logic, and stores the
wg-quick interface name as the description.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2020-10-18 22:27:22 +02:00
parent 265e81a344
commit c3f26340e6
1 changed files with 23 additions and 41 deletions
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64
src/wg-quick/openbsd.bash
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@ -88,42 +88,33 @@ auto_su() {
get_real_interface() { get_real_interface() {
local interface diff local interface line
wg show interfaces >/dev/null while IFS= read -r line; do
[[ -f "/var/run/wireguard/$INTERFACE.name" ]] || return 1 if [[ $line =~ ^([a-z]+[0-9]+):\ .+ ]]; then
interface="$(< "/var/run/wireguard/$INTERFACE.name")" interface="${BASH_REMATCH[1]}"
if [[ $interface != wg* ]]; then continue
[[ -n $interface && -S "/var/run/wireguard/$interface.sock" ]] || return 1 fi
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) )) if [[ $interface == wg* && $line =~ ^\ description:\ wg-quick:\ (.+) && ${BASH_REMATCH[1]} == "$INTERFACE" ]]; then
[[ $diff -ge 2 || $diff -le -2 ]] && return 1 REAL_INTERFACE="$interface"
echo "[+] Tun interface for $INTERFACE is $interface" >&2 return 0
else fi
[[ " $(wg show interfaces) " == *" $interface "* ]] || return 1 done < <(ifconfig)
fi return 1
REAL_INTERFACE="$interface"
return 0
} }
add_if() { add_if() {
local index=0 ret
while true; do while true; do
if ret="$(cmd ifconfig wg$index create 2>&1)"; then local -A existing_ifs="( $(wg show interfaces | sed 's/\([^ ]*\)/[\1]=1/g') )"
mkdir -p "/var/run/wireguard/" local index ret
echo wg$index > /var/run/wireguard/$INTERFACE.name for ((index=0; index <= 2147483647; ++index)); do [[ -v existing_ifs[wg$index] ]] || break; done
get_real_interface if ret="$(cmd ifconfig wg$index create description "wg-quick: $INTERFACE" 2>&1)"; then
REAL_INTERFACE="wg$index"
return 0 return 0
fi fi
if [[ $ret != *"ifconfig: SIOCIFCREATE: File exists"* ]]; then [[ $ret == *"ifconfig: SIOCIFCREATE: File exists"* ]] && continue
echo "[!] Missing WireGuard kernel support ($ret). Falling back to slow userspace implementation." >&3 echo "$ret" >&3
break return 1
fi
echo "[+] wg$index in use, trying next"
((++index))
done done
export WG_TUN_NAME_FILE="/var/run/wireguard/$INTERFACE.name"
mkdir -p "/var/run/wireguard/"
cmd "${WG_QUICK_USERSPACE_IMPLEMENTATION:-wireguard-go}" tun
get_real_interface
} }
del_routes() { del_routes() {
@ -153,12 +144,7 @@ del_routes() {
del_if() { del_if() {
unset_dns unset_dns
if [[ -n $REAL_INTERFACE && $REAL_INTERFACE != wg* ]]; then [[ -n $REAL_INTERFACE ]] && cmd ifconfig $REAL_INTERFACE destroy
cmd rm -f "/var/run/wireguard/$REAL_INTERFACE.sock"
else
cmd ifconfig $REAL_INTERFACE destroy
fi
cmd rm -f "/var/run/wireguard/$INTERFACE.name"
} }
up_if() { up_if() {
@ -438,9 +424,7 @@ cmd_up() {
} }
cmd_down() { cmd_down() {
if ! get_real_interface || [[ " $(wg show interfaces) " != *" $REAL_INTERFACE "* ]]; then get_real_interface || die "\`$INTERFACE' is not a WireGuard interface"
die "\`$INTERFACE' is not a WireGuard interface"
fi
execute_hooks "${PRE_DOWN[@]}" execute_hooks "${PRE_DOWN[@]}"
[[ $SAVE_CONFIG -eq 0 ]] || save_config [[ $SAVE_CONFIG -eq 0 ]] || save_config
del_if del_if
@ -449,9 +433,7 @@ cmd_down() {
} }
cmd_save() { cmd_save() {
if ! get_real_interface || [[ " $(wg show interfaces) " != *" $REAL_INTERFACE "* ]]; then get_real_interface || die "\`$INTERFACE' is not a WireGuard interface"
die "\`$INTERFACE' is not a WireGuard interface"
fi
save_config save_config
} }