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wg-quick: darwin: restore DNS on down 

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2018-05-16 03:09:33 +02:00
parent 9c18c70da6
commit 699777da8c
1 changed files with 25 additions and 13 deletions
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38
src/wg-quick/darwin.bash
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@ -233,30 +233,42 @@ set_endpoint_direct_route() {
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
declare -A SERVICE_DNS
collect_new_service_dns() {
# TODO: switch to scutil for all DNS modification
local service get_response
local -A found_services
{ read -r _; while read -r service; do
[[ $service == "*"* ]] && service="${service:1}"
found_services["$service"]=1
[[ -n ${SERVICE_DNS["$service"]} ]] && continue
get_response="$(cmd networksetup -getdnsservers "$service")"
[[ $get_response == *" "* ]] && get_response="Empty"
[[ -n $get_response ]] && SERVICE_DNS["$service"]="$get_response"
done; } < <(networksetup -listallnetworkservices)
for service in "${!SERVICE_DNS[@]}"; do
[[ ${found_services["$service"]} == 1 ]] || unset SERVICE_DNS["$service"]
done
}
set_dns() {
collect_new_service_dns
local service response
for service in "${!SERVICE_DNS[@]}"; do
while read -r response; do
[[ $response == *Error* ]] && echo "$response" >&2
done < <(cmd networksetup -setdnsservers "$service" "${DNS[@]}")
done; } < <(networksetup -listallnetworkservices)
done
}
del_dns() {
local service response
{ read -r _; while read -r service; do
[[ $service == "*"* ]] && service="${service:1}"
for service in "${!SERVICE_DNS[@]}"; do
while read -r response; do
[[ $response == *Error* ]] && echo "$response" >&2
done < <(cmd networksetup -setdnsservers "$service" Empty)
done; } < <(networksetup -listallnetworkservices)
done < <(cmd networksetup -setdnsservers "$service" ${SERVICE_DNS["$service"]} || true)
done
}
monitor_daemon() {