func (this *RegexpDomainMatcher) Apply(dest v2net.Destination) bool {
if !dest.Address().Family().IsDomain() {
return false
}
domain := dest.Address().Domain()
return this.pattern.MatchString(strings.ToLower(domain))
}
func wsDial(src v2net.Address, dest v2net.Destination) (*wsconn, error) {
commonDial := func(network, addr string) (net.Conn, error) {
return internet.DialToDest(src, dest)
}
tlsconf := &tls.Config{ServerName: dest.Address().Domain(), InsecureSkipVerify: effectiveConfig.DeveloperInsecureSkipVerify}
dialer := websocket.Dialer{NetDial: commonDial, ReadBufferSize: 65536, WriteBufferSize: 65536, TLSClientConfig: tlsconf}
effpto := calcPto(dest)
uri := func(dst v2net.Destination, pto string, path string) string {
return fmt.Sprintf("%v://%v/%v", pto, dst.NetAddr(), path)
}(dest, effpto, effectiveConfig.Path)
conn, resp, err := dialer.Dial(uri, nil)
if err != nil {
if resp != nil {
reason, reasonerr := ioutil.ReadAll(resp.Body)
log.Info(string(reason), reasonerr)
}
return nil, err
}
return func() internet.Connection {
connv2ray := &wsconn{wsc: conn, connClosing: false}
connv2ray.setup()
return connv2ray
}().(*wsconn), nil
}
func (this *PlainDomainMatcher) Apply(dest v2net.Destination) bool {
if !dest.Address().Family().IsDomain() {
return false
}
domain := dest.Address().Domain()
return strings.Contains(domain, this.pattern)
}
func (this *FreedomConnection) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
log.Info("Freedom: Opening connection to ", destination)
defer payload.Release()
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var conn internet.Connection
if this.domainStrategy == DomainStrategyUseIP && destination.Address().Family().IsDomain() {
destination = this.ResolveIP(destination)
}
err := retry.Timed(5, 100).On(func() error {
rawConn, err := internet.Dial(this.meta.Address, destination, this.meta.StreamSettings)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Warning("Freedom: Failed to open connection to ", destination, ": ", err)
return err
}
defer conn.Close()
input := ray.OutboundInput()
output := ray.OutboundOutput()
if !payload.IsEmpty() {
conn.Write(payload.Value)
}
go func() {
v2writer := v2io.NewAdaptiveWriter(conn)
defer v2writer.Release()
v2io.Pipe(input, v2writer)
if tcpConn, ok := conn.(*tcp.RawConnection); ok {
tcpConn.CloseWrite()
}
}()
var reader io.Reader = conn
timeout := this.timeout
if destination.IsUDP() {
timeout = 16
}
if timeout > 0 {
reader = v2net.NewTimeOutReader(int(timeout) /* seconds */, conn)
}
v2reader := v2io.NewAdaptiveReader(reader)
v2io.Pipe(v2reader, output)
v2reader.Release()
ray.OutboundOutput().Close()
return nil
}
func (this *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
var rec *protocol.ServerSpec
var conn internet.Connection
err := retry.Timed(5, 100).On(func() error {
rec = this.serverPicker.PickServer()
rawConn, err := internet.Dial(this.meta.Address, rec.Destination(), this.meta.StreamSettings)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
log.Error("VMess|Outbound: Failed to find an available destination:", err)
return err
}
log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())
command := protocol.RequestCommandTCP
if target.IsUDP() {
command = protocol.RequestCommandUDP
}
request := &protocol.RequestHeader{
Version: encoding.Version,
User: rec.PickUser(),
Command: command,
Address: target.Address(),
Port: target.Port(),
Option: protocol.RequestOptionChunkStream,
}
defer conn.Close()
conn.SetReusable(true)
if conn.Reusable() { // Conn reuse may be disabled on transportation layer
request.Option.Set(protocol.RequestOptionConnectionReuse)
}
input := ray.OutboundInput()
output := ray.OutboundOutput()
var requestFinish, responseFinish sync.Mutex
requestFinish.Lock()
responseFinish.Lock()
session := encoding.NewClientSession(protocol.DefaultIDHash)
go this.handleRequest(session, conn, request, payload, input, &requestFinish)
go this.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)
requestFinish.Lock()
responseFinish.Lock()
return nil
}
func socks5UDPRequest(address v2net.Destination, payload []byte) []byte {
request := make([]byte, 0, 1024)
request = append(request, 0, 0, 0)
request = appendAddress(request, address.Address())
request = address.Port().Bytes(request)
request = append(request, payload...)
return request
}
func (this *VMessOutboundHandler) handleCommand(dest v2net.Destination, cmd protocol.ResponseCommand) {
switch typedCommand := cmd.(type) {
case *protocol.CommandSwitchAccount:
if typedCommand.Host == nil {
typedCommand.Host = dest.Address()
}
this.handleSwitchAccount(typedCommand)
default:
}
}
// Private: Visible for testing.
func (this *Router) ResolveIP(dest v2net.Destination) []v2net.Destination {
ips := this.dnsServer.Get(dest.Address().Domain())
if len(ips) == 0 {
return nil
}
dests := make([]v2net.Destination, len(ips))
for idx, ip := range ips {
if dest.IsTCP() {
dests[idx] = v2net.TCPDestination(v2net.IPAddress(ip), dest.Port())
} else {
dests[idx] = v2net.UDPDestination(v2net.IPAddress(ip), dest.Port())
}
}
return dests
}
func Dial(src v2net.Address, dest v2net.Destination, settings *StreamSettings) (Connection, error) {
var connection Connection
var err error
if dest.IsTCP() {
switch {
case settings.IsCapableOf(StreamConnectionTypeTCP):
connection, err = TCPDialer(src, dest)
case settings.IsCapableOf(StreamConnectionTypeKCP):
connection, err = KCPDialer(src, dest)
case settings.IsCapableOf(StreamConnectionTypeWebSocket):
connection, err = WSDialer(src, dest)
/*Warning: Hours wasted: the following item must be last one
internet.StreamConnectionType have a default value of 1,
so the following attempt will catch all.
*/
case settings.IsCapableOf(StreamConnectionTypeRawTCP):
connection, err = RawTCPDialer(src, dest)
default:
return nil, ErrUnsupportedStreamType
}
if err != nil {
return nil, err
}
if settings.Security == StreamSecurityTypeNone {
return connection, nil
}
config := settings.TLSSettings.GetTLSConfig()
if dest.Address().Family().IsDomain() {
config.ServerName = dest.Address().Domain()
}
tlsConn := tls.Client(connection, config)
return v2tls.NewConnection(tlsConn), nil
}
return UDPDialer(src, dest)
}
func DialKCP(src v2net.Address, dest v2net.Destination) (internet.Connection, error) {
udpDest := v2net.UDPDestination(dest.Address(), dest.Port())
log.Info("KCP|Dialer: Dialing KCP to ", udpDest)
conn, err := internet.DialToDest(src, udpDest)
if err != nil {
log.Error("KCP|Dialer: Failed to dial to dest: ", err)
return nil, err
}
cpip, err := effectiveConfig.GetAuthenticator()
if err != nil {
log.Error("KCP|Dialer: Failed to create authenticator: ", err)
return nil, err
}
conv := uint16(atomic.AddUint32(&globalConv, 1))
session := NewConnection(conv, conn, conn.LocalAddr().(*net.UDPAddr), conn.RemoteAddr().(*net.UDPAddr), cpip)
session.FetchInputFrom(conn)
return session, nil
}
// Private: Visible for testing.
func (this *FreedomConnection) ResolveIP(destination v2net.Destination) v2net.Destination {
if !destination.Address().Family().IsDomain() {
return destination
}
ips := this.dns.Get(destination.Address().Domain())
if len(ips) == 0 {
log.Info("Freedom: DNS returns nil answer. Keep domain as is.")
return destination
}
ip := ips[dice.Roll(len(ips))]
var newDest v2net.Destination
if destination.IsTCP() {
newDest = v2net.TCPDestination(v2net.IPAddress(ip), destination.Port())
} else {
newDest = v2net.UDPDestination(v2net.IPAddress(ip), destination.Port())
}
log.Info("Freedom: Changing destination from ", destination, " to ", newDest)
return newDest
}
func (this *Router) takeDetourWithoutCache(dest v2net.Destination) (string, error) {
for _, rule := range this.config.Rules {
if rule.Apply(dest) {
return rule.Tag, nil
}
}
if this.config.DomainStrategy == UseIPIfNonMatch && dest.Address().Family().IsDomain() {
log.Info("Router: Looking up IP for ", dest)
ipDests := this.ResolveIP(dest)
if ipDests != nil {
for _, ipDest := range ipDests {
log.Info("Router: Trying IP ", ipDest)
for _, rule := range this.config.Rules {
if rule.Apply(ipDest) {
return rule.Tag, nil
}
}
}
}
}
return "", ErrNoRuleApplicable
}
func (this *IPv4Matcher) Apply(dest v2net.Destination) bool {
if !dest.Address().Family().Either(v2net.AddressFamilyIPv4) {
return false
}
return this.ipv4net.Contains(dest.Address().IP())
}
func (this *CIDRMatcher) Apply(dest v2net.Destination) bool {
if !dest.Address().Family().Either(v2net.AddressFamilyIPv4, v2net.AddressFamilyIPv6) {
return false
}
return this.cidr.Contains(dest.Address().IP())
}
func (this *UDPHub) WriteTo(payload []byte, dest v2net.Destination) (int, error) {
return this.conn.WriteToUDP(payload, &net.UDPAddr{
IP: dest.Address().IP(),
Port: int(dest.Port()),
})
}
func socks5Request(command byte, address v2net.Destination) []byte {
request := []byte{socks5Version, command, 0}
request = appendAddress(request, address.Address())
request = address.Port().Bytes(request)
return request
}