109 lines
3.3 KiB
Swift
109 lines
3.3 KiB
Swift
//
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// NEUDPLink.swift
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// TunnelKit
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//
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// Created by Davide De Rosa on 5/23/19.
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// Copyright (c) 2022 Davide De Rosa. All rights reserved.
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//
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// https://github.com/passepartoutvpn
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//
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// This file is part of TunnelKit.
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//
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// TunnelKit is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// TunnelKit is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with TunnelKit. If not, see <http://www.gnu.org/licenses/>.
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//
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import Foundation
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import NetworkExtension
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import TunnelKitCore
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import TunnelKitAppExtension
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class NEUDPLink: LinkInterface {
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private let impl: NWUDPSession
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private let maxDatagrams: Int
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let xorMask: UInt8
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init(impl: NWUDPSession, maxDatagrams: Int? = nil, xorMask: UInt8?) {
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self.impl = impl
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self.maxDatagrams = maxDatagrams ?? 200
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self.xorMask = xorMask ?? 0
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}
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// MARK: LinkInterface
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let isReliable: Bool = false
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var remoteAddress: String? {
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return (impl.resolvedEndpoint as? NWHostEndpoint)?.hostname
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}
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var packetBufferSize: Int {
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return maxDatagrams
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}
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func setReadHandler(queue: DispatchQueue, _ handler: @escaping ([Data]?, Error?) -> Void) {
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// WARNING: runs in Network.framework queue
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impl.setReadHandler({ [weak self] packets, error in
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guard let self = self else {
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return
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}
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var packetsToUse: [Data]?
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if let packets = packets, self.xorMask != 0 {
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packetsToUse = packets.map { packet in
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Data(bytes: packet.map { $0 ^ self.xorMask }, count: packet.count)
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}
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} else {
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packetsToUse = packets
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}
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queue.sync {
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handler(packetsToUse, error)
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}
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}, maxDatagrams: maxDatagrams)
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}
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func writePacket(_ packet: Data, completionHandler: ((Error?) -> Void)?) {
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var dataToUse: Data
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if xorMask != 0 {
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dataToUse = Data(bytes: packet.map { $0 ^ xorMask }, count: packet.count)
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} else {
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dataToUse = packet
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}
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impl.writeDatagram(dataToUse) { error in
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completionHandler?(error)
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}
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}
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func writePackets(_ packets: [Data], completionHandler: ((Error?) -> Void)?) {
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var packetsToUse: [Data]
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if xorMask != 0 {
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packetsToUse = packets.map { packet in
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Data(bytes: packet.map { $0 ^ xorMask }, count: packet.count)
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}
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} else {
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packetsToUse = packets
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}
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impl.writeMultipleDatagrams(packetsToUse) { error in
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completionHandler?(error)
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}
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}
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}
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extension NEUDPSocket: LinkProducer {
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public func link(xorMask: UInt8?) -> LinkInterface {
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return NEUDPLink(impl: impl, maxDatagrams: nil, xorMask: xorMask)
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}
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}
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