wg-quick: wait on process substitutions
Bash does not propagate error values, which is a bummer, but process substitutions are a useful feature. Introduce a new idiom to deal with this: either "; wait $!" after the line to propagate the error, or "|| true" to indicate explicitly that we don't care about the error. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
parent
13fac76a71
commit
26683f6c9a
@ -92,7 +92,7 @@ detect_launchd() {
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LAUNCHED_BY_LAUNCHD=1
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break
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fi
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done < <(launchctl procinfo $$ 2>/dev/null)
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done < <(launchctl procinfo $$ 2>/dev/null); wait $!
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}
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read_bool() {
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@ -132,14 +132,14 @@ del_routes() {
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local todelete=( ) destination gateway netif
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while read -r destination _ _ _ _ netif _; do
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[[ $netif == "$REAL_INTERFACE" ]] && todelete+=( "$destination" )
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done < <(netstat -nr -f inet)
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done < <(netstat -nr -f inet); wait $!
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for destination in "${todelete[@]}"; do
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cmd route -q -n delete -inet "$destination" >/dev/null || true
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done
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todelete=( )
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while read -r destination gateway _ netif; do
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[[ $netif == "$REAL_INTERFACE" || ( $netif == lo* && $gateway == "$REAL_INTERFACE" ) ]] && todelete+=( "$destination" )
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done < <(netstat -nr -f inet6)
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done < <(netstat -nr -f inet6); wait $!
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for destination in "${todelete[@]}"; do
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cmd route -q -n delete -inet6 "$destination" >/dev/null || true
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done
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@ -181,7 +181,7 @@ set_mtu() {
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defaultif="$netif"
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break
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fi
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done < <(netstat -nr -f inet)
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done < <(netstat -nr -f inet); wait $!
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[[ -n $defaultif && $(ifconfig "$defaultif") =~ mtu\ ([0-9]+) ]] && mtu="${BASH_REMATCH[1]}"
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[[ $mtu -gt 0 ]] || mtu=1500
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mtu=$(( mtu - 80 ))
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@ -197,14 +197,14 @@ collect_gateways() {
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[[ $destination == default ]] || continue
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GATEWAY4="$gateway"
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break
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done < <(netstat -nr -f inet)
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done < <(netstat -nr -f inet); wait $!
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GATEWAY6=""
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while read -r destination gateway _; do
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[[ $destination == default ]] || continue
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GATEWAY6="$gateway"
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break
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done < <(netstat -nr -f inet6)
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done < <(netstat -nr -f inet6); wait $!
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}
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collect_endpoints() {
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@ -212,7 +212,7 @@ collect_endpoints() {
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while read -r _ endpoint; do
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[[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
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ENDPOINTS+=( "${BASH_REMATCH[1]}" )
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done < <(wg show "$REAL_INTERFACE" endpoints)
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done < <(wg show "$REAL_INTERFACE" endpoints); wait $!
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}
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declare -A SERVICE_DNS
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@ -230,7 +230,7 @@ collect_new_service_dns() {
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get_response="$(cmd networksetup -getsearchdomains "$service")"
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[[ $get_response == *" "* ]] && get_response="Empty"
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[[ -n $get_response ]] && SERVICE_DNS_SEARCH["$service"]="$get_response"
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done; } < <(networksetup -listallnetworkservices)
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done; } < <(networksetup -listallnetworkservices); wait $!
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for service in "${!SERVICE_DNS[@]}"; do
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if ! [[ -n ${found_services["$service"]} ]]; then
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@ -304,7 +304,7 @@ set_dns() {
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else
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cmd networksetup -setsearchdomains "$service" "${DNS_SEARCH[@]}"
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fi
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)
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); wait $!
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done
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}
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@ -316,7 +316,7 @@ del_dns() {
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done < <(
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cmd networksetup -setdnsservers "$service" ${SERVICE_DNS["$service"]} || true
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cmd networksetup -setsearchdomains "$service" ${SERVICE_DNS_SEARCH["$service"]} || true
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)
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); wait $!
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done
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}
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@ -339,7 +339,7 @@ monitor_daemon() {
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set_dns
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sleep 2 && kill -ALRM $pid 2>/dev/null &
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fi
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done < <(route -n monitor)) &
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done < <(route -n monitor); wait $!) &
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[[ -n $LAUNCHED_BY_LAUNCHD ]] || disown
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}
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@ -367,7 +367,7 @@ add_route() {
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}
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set_config() {
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cmd wg setconf "$REAL_INTERFACE" <(echo "$WG_CONFIG")
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cmd wg setconf "$REAL_INTERFACE" <(echo "$WG_CONFIG"); wait $!
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}
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save_config() {
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@ -375,7 +375,7 @@ save_config() {
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new_config=$'[Interface]\n'
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while read -r address; do
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[[ $address =~ inet6?\ ([^ ]+) ]] && new_config+="Address = ${BASH_REMATCH[1]}"$'\n'
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done < <(ifconfig "$REAL_INTERFACE")
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done < <(ifconfig "$REAL_INTERFACE"); wait $!
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# TODO: actually determine current DNS for interface
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for address in "${DNS[@]}"; do
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new_config+="DNS = $address"$'\n'
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@ -458,7 +458,7 @@ cmd_up() {
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done
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set_mtu
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up_if
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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
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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); wait $!; } | sort -nr -k 2 -t /); do
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add_route "$i"
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done
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[[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route
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@ -121,14 +121,14 @@ del_routes() {
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local todelete=( ) destination gateway netif
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while read -r destination _ _ _ _ netif _; do
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[[ $netif == "$INTERFACE" ]] && todelete+=( "$destination" )
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done < <(netstat -nr -f inet)
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done < <(netstat -nr -f inet); wait $!
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for destination in "${todelete[@]}"; do
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cmd route -q -n delete -inet "$destination" || true
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done
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todelete=( )
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while read -r destination gateway _ netif; do
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[[ $netif == "$INTERFACE" || ( $netif == lo* && $gateway == "$INTERFACE" ) ]] && todelete+=( "$destination" )
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done < <(netstat -nr -f inet6)
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done < <(netstat -nr -f inet6); wait $!
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for destination in "${todelete[@]}"; do
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cmd route -q -n delete -inet6 "$destination" || true
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done
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@ -191,9 +191,9 @@ set_mtu() {
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[[ ${BASH_REMATCH[1]} == *:* ]] && family=inet6
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output="$(route -n get "-$family" "${BASH_REMATCH[1]}" || true)"
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[[ $output =~ interface:\ ([^ ]+)$'\n' && $(ifconfig "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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done < <(wg show "$INTERFACE" endpoints)
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done < <(wg show "$INTERFACE" endpoints); wait $!
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if [[ $mtu -eq 0 ]]; then
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read -r output < <(route -n get default || true) || true
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read -r output < <(route -n get default) || true
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[[ $output =~ interface:\ ([^ ]+)$'\n' && $(ifconfig "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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fi
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[[ $mtu -gt 0 ]] || mtu=1500
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@ -209,14 +209,14 @@ collect_gateways() {
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[[ $destination == default ]] || continue
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GATEWAY4="$gateway"
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break
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done < <(netstat -nr -f inet)
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done < <(netstat -nr -f inet); wait $!
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GATEWAY6=""
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while read -r destination gateway _; do
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[[ $destination == default ]] || continue
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GATEWAY6="$gateway"
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break
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done < <(netstat -nr -f inet6)
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done < <(netstat -nr -f inet6); wait $!
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}
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collect_endpoints() {
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@ -224,7 +224,7 @@ collect_endpoints() {
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while read -r _ endpoint; do
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[[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
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ENDPOINTS+=( "${BASH_REMATCH[1]}" )
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done < <(wg show "$INTERFACE" endpoints)
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done < <(wg show "$INTERFACE" endpoints); wait $!
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}
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set_endpoint_direct_route() {
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@ -294,7 +294,7 @@ monitor_daemon() {
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if_exists || break
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[[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route
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# TODO: set the mtu as well, but only if up
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done < <(route -n monitor)) & disown
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done < <(route -n monitor); wait $!) & disown
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}
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HAVE_SET_DNS=0
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@ -335,7 +335,7 @@ add_route() {
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}
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set_config() {
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cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG")
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cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG"); wait $!
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}
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save_config() {
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@ -343,13 +343,13 @@ save_config() {
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new_config=$'[Interface]\n'
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{ read -r _; while read -r _ _ _ address _; do
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new_config+="Address = $address"$'\n'
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done } < <(netstat -I "$INTERFACE" -n -W -f inet)
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done } < <(netstat -I "$INTERFACE" -n -W -f inet); wait $!
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{ read -r _; while read -r _ _ _ address _; do
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new_config+="Address = $address"$'\n'
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done } < <(netstat -I "$INTERFACE" -n -W -f inet6)
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done } < <(netstat -I "$INTERFACE" -n -W -f inet6); wait $!
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while read -r address; do
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[[ $address =~ ^nameserver\ ([a-zA-Z0-9_=+:%.-]+)$ ]] && new_config+="DNS = ${BASH_REMATCH[1]}"$'\n'
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done < <(resolvconf -l "$INTERFACE" 2>/dev/null)
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done < <(resolvconf -l "$INTERFACE" 2>/dev/null); wait $!
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[[ -n $MTU ]] && new_config+="MTU = $MTU"$'\n'
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[[ -n $TABLE ]] && new_config+="Table = $TABLE"$'\n'
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[[ $SAVE_CONFIG -eq 0 ]] || new_config+=$'SaveConfig = true\n'
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@ -427,7 +427,7 @@ cmd_up() {
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set_mtu
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up_if
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set_dns
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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
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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); wait $!; } | sort -nr -k 2 -t /); do
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add_route "$i"
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done
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[[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route
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@ -132,9 +132,9 @@ set_mtu_up() {
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[[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
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output="$(ip route get "${BASH_REMATCH[1]}" || true)"
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[[ ( $output =~ mtu\ ([0-9]+) || ( $output =~ dev\ ([^ ]+) && $(ip link show dev "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) ) ) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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done < <(wg show "$INTERFACE" endpoints)
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done < <(wg show "$INTERFACE" endpoints); wait $!
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if [[ $mtu -eq 0 ]]; then
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read -r output < <(ip route show default || true) || true
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read -r output < <(ip route show default) || true
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[[ ( $output =~ mtu\ ([0-9]+) || ( $output =~ dev\ ([^ ]+) && $(ip link show dev "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) ) ) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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fi
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[[ $mtu -gt 0 ]] || mtu=1500
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@ -191,8 +191,8 @@ remove_firewall() {
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local table nftcmd
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while read -r table; do
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[[ $table == *" wg-quick-$INTERFACE" ]] && printf -v nftcmd '%sdelete %s\n' "$nftcmd" "$table"
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done < <(nft list tables 2>/dev/null)
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[[ -z $nftcmd ]] || cmd nft -f <(echo -n "$nftcmd")
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done < <(nft list tables 2>/dev/null) || true
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[[ -z $nftcmd ]] || cmd nft -f <(echo -n "$nftcmd"); wait $!
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fi
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if type -p iptables >/dev/null; then
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local line iptables found restore
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@ -202,7 +202,7 @@ remove_firewall() {
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[[ $line == "*"* || $line == COMMIT || $line == "-A "*"-m comment --comment \"wg-quick(8) rule for $INTERFACE\""* ]] || continue
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[[ $line == "-A"* ]] && found=1
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printf -v restore '%s%s\n' "$restore" "${line/#-A/-D}"
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done < <($iptables-save 2>/dev/null)
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done < <($iptables-save 2>/dev/null) || true
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[[ $found -ne 1 ]] || echo -n "$restore" | cmd $iptables-restore -n
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done
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fi
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@ -233,22 +233,22 @@ add_default() {
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[[ $line =~ .*inet6?\ ([0-9a-f:.]+)/[0-9]+.* ]] || continue
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printf -v restore '%s-I PREROUTING ! -i %s -d %s -m addrtype ! --src-type LOCAL -j DROP %s\n' "$restore" "$INTERFACE" "${BASH_REMATCH[1]}" "$marker"
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printf -v nftcmd '%sadd rule %s %s preraw iifname != "%s" %s daddr %s fib saddr type != local drop\n' "$nftcmd" "$pf" "$nftable" "$INTERFACE" "$pf" "${BASH_REMATCH[1]}"
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done < <(ip -o $proto addr show dev "$INTERFACE" 2>/dev/null)
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done < <(ip -o $proto addr show dev "$INTERFACE"); wait $!
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printf -v restore '%sCOMMIT\n*mangle\n-I POSTROUTING -m mark --mark %d -p udp -j CONNMARK --save-mark %s\n-I PREROUTING -p udp -j CONNMARK --restore-mark %s\nCOMMIT\n' "$restore" $table "$marker" "$marker"
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printf -v nftcmd '%sadd rule %s %s postmangle meta l4proto udp mark %d ct mark set mark \n' "$nftcmd" "$pf" "$nftable" $table
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printf -v nftcmd '%sadd rule %s %s premangle meta l4proto udp meta mark set ct mark \n' "$nftcmd" "$pf" "$nftable"
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[[ $proto == -4 ]] && cmd sysctl -q net.ipv4.conf.all.src_valid_mark=1
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if type -p nft >/dev/null; then
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cmd nft -f <(echo -n "$nftcmd")
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cmd nft -f <(echo -n "$nftcmd"); wait $!
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else
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echo -n "$restore" | cmd $iptables-restore -n
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echo -n "$restore" | cmd $iptables-restore -n; wait $!
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fi
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HAVE_SET_FIREWALL=1
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return 0
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}
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set_config() {
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cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG")
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cmd wg setconf "$INTERFACE" <(echo "$WG_CONFIG"); wait $!
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}
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save_config() {
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@ -260,7 +260,7 @@ save_config() {
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done
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while read -r address; do
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[[ $address =~ ^nameserver\ ([a-zA-Z0-9_=+:%.-]+)$ ]] && new_config+="DNS = ${BASH_REMATCH[1]}"$'\n'
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done < <(resolvconf -l "$(resolvconf_iface_prefix)$INTERFACE" 2>/dev/null || cat "/etc/resolvconf/run/interface/$(resolvconf_iface_prefix)$INTERFACE" 2>/dev/null)
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done < <(resolvconf -l "$(resolvconf_iface_prefix)$INTERFACE" 2>/dev/null || cat "/etc/resolvconf/run/interface/$(resolvconf_iface_prefix)$INTERFACE" 2>/dev/null) || true
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[[ -n $MTU && $(ip link show dev "$INTERFACE") =~ mtu\ ([0-9]+) ]] && new_config+="MTU = ${BASH_REMATCH[1]}"$'\n'
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[[ -n $TABLE ]] && new_config+="Table = $TABLE"$'\n'
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[[ $SAVE_CONFIG -eq 0 ]] || new_config+=$'SaveConfig = true\n'
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@ -335,7 +335,7 @@ cmd_up() {
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done
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set_mtu_up
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set_dns
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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
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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); wait $!; } | sort -nr -k 2 -t /); do
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add_route "$i"
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done
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execute_hooks "${POST_UP[@]}"
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@ -131,14 +131,14 @@ del_routes() {
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[[ -n $REAL_INTERFACE ]] || return 0
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while read -r destination _ _ _ _ netif _; do
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[[ $netif == "$REAL_INTERFACE" ]] && todelete+=( "$destination" )
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done < <(netstat -nr -f inet)
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done < <(netstat -nr -f inet); wait $!
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for destination in "${todelete[@]}"; do
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cmd route -q -n delete -inet "$destination" || true
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done
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todelete=( )
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while read -r destination gateway _ netif; do
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[[ $netif == "$REAL_INTERFACE" || ( $netif == lo* && $gateway == "$REAL_INTERFACE" ) ]] && todelete+=( "$destination" )
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done < <(netstat -nr -f inet6)
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done < <(netstat -nr -f inet6); wait $!
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for destination in "${todelete[@]}"; do
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cmd route -q -n delete -inet6 "$destination" || true
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done
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@ -189,9 +189,9 @@ set_mtu() {
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[[ ${BASH_REMATCH[1]} == *:* ]] && family=inet6
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output="$(route -n get "-$family" "${BASH_REMATCH[1]}" || true)"
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[[ $output =~ interface:\ ([^ ]+)$'\n' && $(ifconfig "${BASH_REMATCH[1]}") =~ mtu\ ([0-9]+) && ${BASH_REMATCH[1]} -gt $mtu ]] && mtu="${BASH_REMATCH[1]}"
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done < <(wg show "$REAL_INTERFACE" endpoints)
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done < <(wg show "$REAL_INTERFACE" endpoints); wait $!
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if [[ $mtu -eq 0 ]]; then
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read -r output < <(route -n get default || true) || true
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read -r output < <(route -n get default) || 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
|
||||
@ -207,14 +207,14 @@ collect_gateways() {
|
||||
[[ $destination == default ]] || continue
|
||||
GATEWAY4="$gateway"
|
||||
break
|
||||
done < <(netstat -nr -f inet)
|
||||
done < <(netstat -nr -f inet); wait $!
|
||||
|
||||
GATEWAY6=""
|
||||
while read -r destination gateway _; do
|
||||
[[ $destination == default ]] || continue
|
||||
GATEWAY6="$gateway"
|
||||
break
|
||||
done < <(netstat -nr -f inet6)
|
||||
done < <(netstat -nr -f inet6); wait $!
|
||||
}
|
||||
|
||||
collect_endpoints() {
|
||||
@ -222,7 +222,7 @@ collect_endpoints() {
|
||||
while read -r _ endpoint; do
|
||||
[[ $endpoint =~ ^\[?([a-z0-9:.]+)\]?:[0-9]+$ ]] || continue
|
||||
ENDPOINTS+=( "${BASH_REMATCH[1]}" )
|
||||
done < <(wg show "$REAL_INTERFACE" endpoints)
|
||||
done < <(wg show "$REAL_INTERFACE" endpoints); wait $!
|
||||
}
|
||||
|
||||
set_endpoint_direct_route() {
|
||||
@ -290,7 +290,7 @@ monitor_daemon() {
|
||||
ifconfig "$REAL_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
|
||||
done < <(route -n monitor); wait $!) & disown
|
||||
}
|
||||
|
||||
set_dns() {
|
||||
@ -339,7 +339,7 @@ add_route() {
|
||||
}
|
||||
|
||||
set_config() {
|
||||
cmd wg setconf "$REAL_INTERFACE" <(echo "$WG_CONFIG")
|
||||
cmd wg setconf "$REAL_INTERFACE" <(echo "$WG_CONFIG"); wait $!
|
||||
}
|
||||
|
||||
save_config() {
|
||||
@ -347,7 +347,7 @@ save_config() {
|
||||
new_config=$'[Interface]\n'
|
||||
{ read -r _; while read -r _ _ network address _; do
|
||||
[[ $network == *Link* ]] || new_config+="Address = $address"$'\n'
|
||||
done } < <(netstat -I "$REAL_INTERFACE" -n -v)
|
||||
done } < <(netstat -I "$REAL_INTERFACE" -n -v); wait $!
|
||||
# TODO: actually determine current DNS for interface
|
||||
for address in "${DNS[@]}"; do
|
||||
new_config+="DNS = $address"$'\n'
|
||||
@ -428,7 +428,7 @@ cmd_up() {
|
||||
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 "$i"; done; done < <(wg show "$REAL_INTERFACE" allowed-ips) | sort -nr -k 2 -t /); 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); wait $!; } | sort -nr -k 2 -t /); do
|
||||
add_route "$i"
|
||||
done
|
||||
[[ $AUTO_ROUTE4 -eq 1 || $AUTO_ROUTE6 -eq 1 ]] && set_endpoint_direct_route
|
||||
|
||||
Reference in New Issue
Block a user