initial code

internal/storage/filter.go

@@ -2,6 +2,7 @@ package storage
 
 import (
 	"fmt"
+	"slices"
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
@@ -121,6 +122,10 @@ func filterServer(server models.Server,
 		return true
 	}
 
+	if filterByPorts(selection, server.PortsTCP) {
+		return true
+	}
+
 	// TODO filter port forward server for PIA
 
 	return false
@@ -164,3 +169,21 @@ func filterByProtocol(selection settings.ServerSelection,
 		return (wantTCP && !serverTCP) || (wantUDP && !serverUDP)
 	}
 }
+
+func filterByPorts(selection settings.ServerSelection,
+	serverPorts []uint16,
+) (filtered bool) {
+	if len(serverPorts) == 0 {
+		return false
+	}
+
+	customPort := *selection.OpenVPN.CustomPort
+	if selection.VPN == vpn.Wireguard {
+		customPort = *selection.Wireguard.EndpointPort
+	}
+	if customPort == 0 {
+		return false
+	}
+
+	return !slices.Contains(serverPorts, customPort)
+}

internal/storage/formatting.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/vpn"
 )
 
 func commaJoin(slice []string) string {
@@ -16,7 +17,7 @@ func commaJoin(slice []string) string {
 
 var ErrNoServerFound = errors.New("no server found")
 
-func noServerFoundError(selection settings.ServerSelection) (err error) {
+func noServerFoundError(selection settings.ServerSelection) (err error) { //nolint:gocyclo
 	var messageParts []string
 
 	messageParts = append(messageParts, "VPN "+selection.VPN)
@@ -153,6 +154,15 @@ func noServerFoundError(selection settings.ServerSelection) (err error) {
 			"target ip address "+selection.TargetIP.String())
 	}
 
+	customPort := *selection.OpenVPN.CustomPort
+	if selection.VPN == vpn.Wireguard {
+		customPort = *selection.Wireguard.EndpointPort
+	}
+	if customPort > 0 {
+		messageParts = append(messageParts,
+			fmt.Sprintf("%s endpoint port %d", selection.VPN, customPort))
+	}
+
 	message := "for " + strings.Join(messageParts, "; ")
 
 	return fmt.Errorf("%w: %s", ErrNoServerFound, message)