[WIP] shadowsocks implementation added

This commit is contained in:
Alex Kh 2021-12-21 23:17:22 +04:00
parent 40996888c9
commit 6583090d4f
2259 changed files with 417734 additions and 92 deletions

View file

@ -50,4 +50,5 @@ func wg_log(_ type: OSLogType, staticMessage msg: StaticString) {
func wg_log(_ type: OSLogType, message msg: String) {
os_log("%{public}s", log: OSLog.default, type: type, msg)
Logger.global?.log(message: msg)
NSLog("AMNEZIA: \(msg)")
}

View file

@ -5,11 +5,15 @@ import Foundation
import NetworkExtension
import os
import OpenVPNAdapter
import ShadowSocks
//import Tun2Socks
enum TunnelProtoType: String {
case wireguard, openvpn, none
case wireguard, openvpn, shadowsocks, none
}
typealias ShadowsocksProxyCompletion = ((Int32, NSError?) -> Void)?
class PacketTunnelProvider: NEPacketTunnelProvider {
private lazy var wgAdapter: WireGuardAdapter = {
@ -24,6 +28,16 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
return adapter
}()
private var shadowSocksPort: Int32 = 0
private var isShadowsocksRunning: Bool = false
var ssCompletion: ShadowsocksProxyCompletion = nil
private let ssQueue = DispatchQueue(label: "org.amnezia.shadowsocks")
private var shadowSocksConfig: Data? = nil
// private var tun2socksWriter: AmneziaTun2SocksWriter? = nil
// private var tun2socksTunnel: Tun2socksOutlineTunnelProtocol? = nil
// private let processQueue = DispatchQueue(label: "org.amnezia.process-packets")
let vpnReachability = OpenVPNReachability()
var startHandler: ((Error?) -> Void)?
@ -39,7 +53,8 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
if let protocolConfiguration = self.protocolConfiguration as? NETunnelProviderProtocol,
let providerConfiguration = protocolConfiguration.providerConfiguration,
let _: Data = providerConfiguration["ovpn"] as? Data {
protoType = .openvpn
let withoutShadowSocks = providerConfiguration["ss"] as? Data == nil
protoType = withoutShadowSocks ? .openvpn : .shadowsocks
} else {
protoType = .wireguard
}
@ -51,6 +66,10 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
completionHandler: completionHandler)
case .openvpn:
startOpenVPN(completionHandler: completionHandler)
case .shadowsocks:
startShadowSocks { error in
}
case .none:
break
}
@ -62,6 +81,8 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
stopWireguard(with: reason, completionHandler: completionHandler)
case .openvpn:
stopOpenVPN(with: reason, completionHandler: completionHandler)
case .shadowsocks:
stopShadowSocks(with: reason, completionHandler: completionHandler)
case .none:
break
}
@ -169,32 +190,62 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
guard let protocolConfiguration = self.protocolConfiguration as? NETunnelProviderProtocol,
let providerConfiguration = protocolConfiguration.providerConfiguration,
let ovpnConfiguration: Data = providerConfiguration["ovpn"] as? Data else {
// TODO: handle errors properly
wg_log(.error, message: "Can't start startOpenVPN()")
return
}
let configuration = OpenVPNConfiguration()
configuration.fileContent = ovpnConfiguration
// configuration.settings = [] // Additional setting if needed any
// configuration.tunPersist = true // keep tun active during pauses/reconections
let evaluation: OpenVPNConfigurationEvaluation
do {
evaluation = try ovpnAdapter.apply(configuration: configuration)
} catch {
completionHandler(error)
return
}
setupAndlaunchOpenVPN(withConfig: ovpnConfiguration, completionHandler: completionHandler)
}
private func startShadowSocks(completionHandler: @escaping (Error?) -> Void) {
guard let protocolConfiguration = self.protocolConfiguration as? NETunnelProviderProtocol,
let providerConfiguration = protocolConfiguration.providerConfiguration,
let ssConfiguration: Data = providerConfiguration["ss"] as? Data,
let ovpnConfiguration: Data = providerConfiguration["ovpn"] as? Data else {
// TODO: handle errors properly
wg_log(.error, message: "Cannot start startShadowSocks()")
return
}
// self.shadowSocksConfig = ssConfiguration
//
// guard let config = self.shadowSocksConfig else { return }
// guard let ssConfig = try? JSONSerialization.jsonObject(with: config, options: []) as? [String: Any] else {
// self.ssCompletion?(0, NSError(domain: Bundle.main.bundleIdentifier ?? "unknown",
// code: 100,
// userInfo: [NSLocalizedDescriptionKey: "Cannot parse json for ss in tunnel"]))
// return
// }
if !evaluation.autologin {
print("Implement login with user credentials")
}
// let sshost = ssConfig["local_addr"] as? String
// let ssport = ssConfig["local_port"] as? Int ?? Int(self.shadowSocksPort)
//
// let method = ssConfig["method"] as? String
// let password = ssConfig["password"] as? String
vpnReachability.startTracking { [weak self] status in
guard status == .reachableViaWiFi else { return }
self?.ovpnAdapter.reconnect(afterTimeInterval: 5)
}
startHandler = completionHandler
ovpnAdapter.connect(using: packetFlow)
// Thread.detachNewThread { [weak self] in
setupAndLaunchShadowSocksProxy(withConfig: ssConfiguration, ssHandler: { [weak self] port, error in
wg_log(.info,
message: "Prepare to start openvpn, self is \(self == nil ? "null" : "not null")")
guard error == nil else {
wg_log(.error, message: "Stopping tunnel: \(error?.localizedDescription ?? "none")")
completionHandler(error!)
return
}
self?.setupAndlaunchOpenVPN(withConfig: ovpnConfiguration) { error in
guard error == nil else {
wg_log(.error, message: "Start OpenVPN tunnel error : \(error?.localizedDescription ?? "none")")
completionHandler(error!)
return
}
wg_log(.error, message: "OpenVPN tunnel connected.")
}
// self?.startTun2Socks(host: sshost, port: ssport, password: password, cipher: method, isUDPEnabled: false, error: nil)
})
// }
}
private func stopWireguard(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
@ -224,6 +275,186 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
}
ovpnAdapter.disconnect()
}
private func stopShadowSocks(with reason: NEProviderStopReason, completionHandler: @escaping () -> Void) {
stopOpenVPN(with: reason) {
// if self.tun2socksTunnel != nil && self.tun2socksTunnel!.isConnected() {
// self.tun2socksTunnel?.disconnect()
// try? self.tun2socksWriter?.close()
// }
}
}
// private func startTun2Socks(host: String?, port: Int, password: String?, cipher: String?, isUDPEnabled: Bool, error: NSErrorPointer) {
// let isOn = self.tun2socksTunnel != nil && self.tun2socksTunnel!.isConnected()
// if isOn { tun2socksTunnel?.disconnect() }
// self.tun2socksWriter = AmneziaTun2SocksWriter(tunnelFlow: self.packetFlow)
// self.tun2socksTunnel = Tun2socksConnectShadowsocksTunnel(self.tun2socksWriter, host, port, password, cipher, isUDPEnabled, error)
// if (!isOn) {
// self.processQueue.sync { self.processPackets() }
// }
// }
//
// private func processPackets() {
// wg_log(.info, message: "Inside startTun2SocksPacketForwarder")
// packetFlow.readPacketObjects { [weak self] packets in
// guard let `self` = self else { return }
// do {
// let _ = try packets.map {
// var bytesWritten: Int = 0
// try self.tun2socksTunnel?.write($0.data, ret0_: &bytesWritten)
// self.processQueue.sync {
// self.processPackets()
// }
// }
// } catch (let err) {
// wg_log(.debug, message: "Error in tun2sock: \(err.localizedDescription)")
// }
// }
// }
private func setupAndlaunchOpenVPN(withConfig ovpnConfiguration: Data, completionHandler: @escaping (Error?) -> Void) {
wg_log(.info, message: "Inside setupAndlaunchOpenVPN()")
let str = String(decoding: ovpnConfiguration, as: UTF8.self)
wg_log(.info, message: "OPENVPN config: \(str)")
let configuration = OpenVPNConfiguration()
configuration.fileContent = ovpnConfiguration
let evaluation: OpenVPNConfigurationEvaluation
do {
evaluation = try ovpnAdapter.apply(configuration: configuration)
} catch {
completionHandler(error)
return
}
if !evaluation.autologin {
wg_log(.info, message: "Implement login with user credentials")
}
vpnReachability.startTracking { [weak self] status in
guard status == .reachableViaWiFi else { return }
self?.ovpnAdapter.reconnect(afterTimeInterval: 5)
}
startHandler = completionHandler
ovpnAdapter.connect(using: packetFlow)
}
private func setupAndLaunchShadowSocksProxy(withConfig config: Data, ssHandler: ShadowsocksProxyCompletion) {
let str = String(decoding: config, as: UTF8.self)
wg_log(.info, message: "config: \(str)")
ssCompletion = ssHandler
guard let ssConfig = try? JSONSerialization.jsonObject(with: config, options: []) as? [String: Any] else {
ssHandler?(0, NSError(domain: Bundle.main.bundleIdentifier ?? "unknown",
code: 100,
userInfo: [NSLocalizedDescriptionKey: "Cannot parse json for ss in tunnel"]))
return
}
wg_log(.info, message: "SS Config: \(ssConfig)")
guard let remoteHost = ssConfig["server"] as? String, // UnsafeMutablePointer<CChar>,
let remotePort = ssConfig["server_port"] as? Int32,
let localAddress = ssConfig["local_addr"] as? String, //UnsafeMutablePointer<CChar>,
let localPort = ssConfig["local_port"] as? Int32,
let method = ssConfig["method"] as? String, //UnsafeMutablePointer<CChar>,
let password = ssConfig["password"] as? String,//UnsafeMutablePointer<CChar>,
let timeout = ssConfig["timeout"] as? Int32
else {
ssHandler?(0, NSError(domain: Bundle.main.bundleIdentifier ?? "unknown",
code: 100,
userInfo: [NSLocalizedDescriptionKey: "Cannot assing profile params for ss in tunnel"]))
return
}
/* An example profile
*
* const profile_t EXAMPLE_PROFILE = {
* .remote_host = "example.com",
* .local_addr = "127.0.0.1",
* .method = "bf-cfb",
* .password = "barfoo!",
* .remote_port = 8338,
* .local_port = 1080,
* .timeout = 600;
* .acl = NULL,
* .log = NULL,
* .fast_open = 0,
* .mode = 0,
* .verbose = 0
* };
*/
var profile: profile_t = .init()
memset(&profile, 0, MemoryLayout<profile_t>.size)
profile.remote_host = strdup(remoteHost)
profile.remote_port = remotePort
profile.local_addr = strdup(localAddress)
profile.local_port = localPort
profile.method = strdup(method)
profile.password = strdup(password)
profile.timeout = timeout
profile.acl = nil
profile.log = nil
profile.mtu = 1600
profile.fast_open = 1
profile.mode = 0
profile.verbose = 1
wg_log(.debug, message: "Prepare to start shadowsocks proxy server...")
let observer = UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque())
ssQueue.sync { [weak self] in
let success = start_ss_local_server_with_callback(profile, { socks_fd, udp_fd, data in
wg_log(.debug, message: "Inside cb callback")
wg_log(.debug, message: "Params: socks_fd -> \(socks_fd), udp_fd -> \(udp_fd)")
if let obs = data {
wg_log(.debug, message: "Prepare to call onShadowsocksCallback() with socks port \(socks_fd) and udp port \(udp_fd)")
let mySelf = Unmanaged<PacketTunnelProvider>.fromOpaque(obs).takeUnretainedValue()
mySelf.onShadowsocksCallback(fd: socks_fd)
}
}, observer)
if success != -1 {
wg_log(.error, message: "ss proxy started on port \(localPort)")
self?.shadowSocksPort = localPort
self?.isShadowsocksRunning = true
} else {
wg_log(.error, message: "Failed to start ss proxy")
}
}
}
private func onShadowsocksCallback(fd: Int32) {
wg_log(.debug, message: "Inside onShadowsocksCallback() with port \(fd)")
var error: NSError? = nil
if fd > 0 {
// shadowSocksPort = getSockPort(for: fd)
isShadowsocksRunning = true
} else {
error = NSError(domain: Bundle.main.bundleIdentifier ?? "unknown", code: 100, userInfo: [NSLocalizedDescriptionKey : "Failed to start shadowsocks proxy"])
}
ssCompletion?(shadowSocksPort, error)
}
private func getSockPort(for fd: Int32) -> Int32 {
var addr_in = sockaddr_in();
addr_in.sin_len = UInt8(MemoryLayout.size(ofValue: addr_in));
addr_in.sin_family = sa_family_t(AF_INET);
var len = socklen_t(addr_in.sin_len);
let result = withUnsafeMutablePointer(to: &addr_in, {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {
return Darwin.getsockname(fd, $0, &len);
}
});
if result == 0 {
return Int32(addr_in.sin_port);
} else {
wg_log(.error, message: "getSockPort(\(fd)) error: \(String(describing: strerror(errno)))")
return 0
}
}
}
extension WireGuardLogLevel {
@ -276,7 +507,6 @@ extension PacketTunnelProvider: OpenVPNAdapterDelegate {
startHandler(nil)
self.startHandler = nil
case .disconnected:
guard let stopHandler = stopHandler else { return }
@ -286,10 +516,8 @@ extension PacketTunnelProvider: OpenVPNAdapterDelegate {
stopHandler()
self.stopHandler = nil
case .reconnecting:
reasserting = true
default:
break
}
@ -316,7 +544,23 @@ extension PacketTunnelProvider: OpenVPNAdapterDelegate {
// Use this method to process any log message returned by OpenVPN library.
func openVPNAdapter(_ openVPNAdapter: OpenVPNAdapter, handleLogMessage logMessage: String) {
// Handle log messages
wg_log(.info, message: logMessage)
}
}
//class AmneziaTun2SocksWriter: Tun2socksTunWriter {
// private var tunnelFlow: NEPacketTunnelFlow
//
// init(tunnelFlow: NEPacketTunnelFlow) {
// self.tunnelFlow = tunnelFlow
// super.init()
// }
//
// override func write(_ p0: Data?, n: UnsafeMutablePointer<Int>?) throws {
// if let packets = p0 {
// tunnelFlow.writePackets([packets], withProtocols: [NSNumber(value: AF_INET)])
// }
// }
//
// override func close() throws {}
//}

View file

@ -29,6 +29,8 @@ public class IOSVpnProtocolImpl : NSObject {
private var privateKey : PrivateKey? = nil
private var deviceIpv4Address: String? = nil
private var deviceIpv6Address: String? = nil
private var openVPNConfig: String? = nil
private var shadowSocksConfig: String? = nil
@objc enum ConnectionState: Int { case Error, Connected, Disconnected }
@ -45,6 +47,8 @@ public class IOSVpnProtocolImpl : NSObject {
precondition(!vpnBundleID.isEmpty)
stateChangeCallback = callback
self.openVPNConfig = config
self.shadowSocksConfig = nil
NotificationCenter.default.removeObserver(self)
NotificationCenter.default.addObserver(self,
@ -117,6 +121,8 @@ public class IOSVpnProtocolImpl : NSObject {
self.privateKey = PrivateKey(rawValue: privateKey)
self.deviceIpv4Address = deviceIpv4Address
self.deviceIpv6Address = deviceIpv6Address
self.openVPNConfig = nil
self.shadowSocksConfig = nil
NotificationCenter.default.removeObserver(self)
@ -170,6 +176,63 @@ public class IOSVpnProtocolImpl : NSObject {
}
}
}
@objc init(bundleID: String,
tunnelConfig: String,
ssConfig: String,
closure: @escaping (ConnectionState, Date?) -> Void,
callback: @escaping (Bool) -> Void) {
super.init()
vpnBundleID = bundleID;
precondition(!vpnBundleID.isEmpty)
stateChangeCallback = callback
self.openVPNConfig = tunnelConfig
self.shadowSocksConfig = ssConfig
NotificationCenter.default.removeObserver(self)
NotificationCenter.default.addObserver(self, selector: #selector(self.vpnStatusDidChange(notification:)), name: Notification.Name.NEVPNStatusDidChange, object: nil)
NETunnelProviderManager.loadAllFromPreferences { [weak self] managers, error in
if let error = error {
Logger.global?.log(message: "Loading from preference failed: \(error)")
closure(ConnectionState.Error, nil)
return
}
if self == nil {
Logger.global?.log(message: "We are shutting down.")
return
}
let nsManagers = managers ?? []
Logger.global?.log(message: "We have received \(nsManagers.count) managers.")
print("We have received \(nsManagers.count) managers.")
let tunnel = nsManagers.first(where: IOSVpnProtocolImpl.isOurManager(_:))
if tunnel == nil {
Logger.global?.log(message: "Creating the tunnel via shadowsocks")
print("Creating the tunnel via SS")
self!.tunnel = NETunnelProviderManager()
closure(ConnectionState.Disconnected, nil)
return
}
Logger.global?.log(message: "Tunnel already exists")
print("SS Tunnel already exists")
self!.tunnel = tunnel
if tunnel?.connection.status == .connected {
closure(ConnectionState.Connected, tunnel?.connection.connectedDate)
} else {
closure(ConnectionState.Disconnected, nil)
}
}
}
@objc private func vpnStatusDidChange(notification: Notification) {
guard let session = (notification.object as? NETunnelProviderSession), tunnel?.connection == session else { return }
@ -230,6 +293,27 @@ public class IOSVpnProtocolImpl : NSObject {
return true
}
@objc func connect(ssConfig: String,
ovpnConfig: String,
failureCallback: @escaping () -> Void) {
Logger.global?.log(message: "Connecting")
assert(tunnel != nil)
self.openVPNConfig = ovpnConfig
self.shadowSocksConfig = ssConfig
let addr: String = ovpnConfig
.splitToArray(separator: "\n", trimmingCharacters: nil)
.first { $0.starts(with: "remote ") }
.splitToArray(separator: " ", trimmingCharacters: nil)[1]
print("server: \(addr)")
// Let's remove the previous config if it exists.
(tunnel?.protocolConfiguration as? NETunnelProviderProtocol)?.destroyConfigurationReference()
self.configureTunnel(withShadowSocks: self.shadowSocksConfig, serverAddress: addr, config: self.openVPNConfig, failureCallback: failureCallback)
}
@objc func connect(ovpnConfig: String, failureCallback: @escaping () -> Void) {
Logger.global?.log(message: "Connecting")
assert(tunnel != nil)
@ -299,6 +383,8 @@ public class IOSVpnProtocolImpl : NSObject {
failureCallback()
return
}
guard tunnel != nil else { failureCallback(); return }
proto.providerBundleIdentifier = vpnBundleID
tunnel!.protocolConfiguration = proto
@ -351,6 +437,47 @@ public class IOSVpnProtocolImpl : NSObject {
}
}
func configureTunnel(withShadowSocks ssConfig: String?, serverAddress: String, config: String?, failureCallback: @escaping () -> Void) {
guard let ss = ssConfig, let ovpn = config else { failureCallback(); return }
let tunnelProtocol = NETunnelProviderProtocol()
tunnelProtocol.serverAddress = serverAddress
tunnelProtocol.providerBundleIdentifier = vpnBundleID
tunnelProtocol.providerConfiguration = ["ovpn": Data(ovpn.utf8), "ss": Data(ss.utf8)]
tunnel?.protocolConfiguration = tunnelProtocol
tunnel?.localizedDescription = "Amnezia ShadowSocks"
tunnel?.isEnabled = true
tunnel?.saveToPreferences { [unowned self] saveError in
if let error = saveError {
Logger.global?.log(message: "Connect ShadowSocks Tunnel Save Error: \(error)")
failureCallback()
return
}
Logger.global?.log(message: "Saving ShadowSocks tunnel succeeded")
self.tunnel?.loadFromPreferences { error in
if let error = error {
Logger.global?.log(message: "Connect ShadowSocks Tunnel Load Error: \(error)")
failureCallback()
return
}
Logger.global?.log(message: "Loading the ShadowSocks tunnel succeeded")
print("Loading the ss tunnel succeeded")
do {
print("starting ss tunnel")
try self.tunnel?.connection.startVPNTunnel()
} catch let error {
Logger.global?.log(message: "Something went wrong: \(error)")
failureCallback()
return
}
}
}
}
func configureOpenVPNTunnel(serverAddress: String, config: String, failureCallback: @escaping () -> Void) {
let tunnelProtocol = NETunnelProviderProtocol()
tunnelProtocol.serverAddress = serverAddress
@ -393,7 +520,7 @@ public class IOSVpnProtocolImpl : NSObject {
@objc func disconnect() {
Logger.global?.log(message: "Disconnecting")
assert(tunnel != nil)
guard tunnel != nil else { return }
(tunnel!.connection as? NETunnelProviderSession)?.stopTunnel()
}
@ -408,12 +535,60 @@ public class IOSVpnProtocolImpl : NSObject {
checkWireguardStatus(callback: callback)
case .openvpn:
checkOVPNStatus(callback: callback)
case .shadowsocks:
checkShadowSocksStatus(callback: callback)
case .empty:
break
}
}
private func checkShadowSocksStatus(callback: @escaping (String, String, String) -> Void) {
Logger.global?.log(message: "Check ShadowSocks")
guard let proto = tunnel?.protocolConfiguration as? NETunnelProviderProtocol else {
callback("", "", "")
return
}
guard let ssData = proto.providerConfiguration?["ss"] as? Data,
let ssConfig = try? JSONSerialization.jsonObject(with: ssData, options: []) as? [String: Any],
let serverIpv4Gateway = ssConfig["remote_host"] as? String else {
callback("", "", "")
return
}
print("server IP: \(serverIpv4Gateway)")
let deviceIpv4Address = getTunIPAddress()
print("device IP: \(serverIpv4Gateway)")
if deviceIpv4Address == nil {
callback("", "", "")
return
}
guard let session = tunnel?.connection as? NETunnelProviderSession else {
callback("", "", "")
return
}
do {
try session.sendProviderMessage(Data([UInt8(0)])) { [callback] data in
guard let data = data,
let configString = String(data: data, encoding: .utf8)
else {
Logger.global?.log(message: "Failed to convert data to string")
callback("", "", "")
return
}
callback("\(serverIpv4Gateway)", "\(deviceIpv4Address!)", configString)
}
} catch {
Logger.global?.log(message: "Failed to retrieve data from session")
callback("", "", "")
}
}
private func checkOVPNStatus(callback: @escaping (String, String, String) -> Void) {
Logger.global?.log(message: "Check OpenVPN")
guard let proto = tunnel?.protocolConfiguration as? NETunnelProviderProtocol else {
@ -463,7 +638,6 @@ public class IOSVpnProtocolImpl : NSObject {
Logger.global?.log(message: "Failed to retrieve data from session")
callback("", "", "")
}
}
private func checkWireguardStatus(callback: @escaping (String, String, String) -> Void) {
@ -549,7 +723,7 @@ public class IOSVpnProtocolImpl : NSObject {
}
enum TunnelType: String {
case wireguard, openvpn, empty
case wireguard, openvpn, shadowsocks, empty
}
extension String {
@ -557,6 +731,7 @@ extension String {
switch self {
case "wireguard": return .wireguard
case "openvpn": return .openvpn
case "shadowsocks": return .shadowsocks
default:
return .empty
}