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
}
// 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 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
}
func calcPto(dst v2net.Destination) string {
if effectiveConfig.Pto != "" {
return effectiveConfig.Pto
}
switch dst.Port().Value() {
/*
Since the value is not given explicitly,
We are guessing it now.
HTTP Port:
80
8080
8880
2052
2082
2086
2095
HTTPS Port:
443
2053
2083
2087
2096
8443
if the port you are using is not well-known,
specify it to avoid this process.
We will return "CRASH"turn "unknown" if we can't guess it, cause Dial to fail.
*/
case 80, 8080, 8880, 2052, 2082, 2086, 2095:
return "ws"
case 443, 2053, 2083, 2087, 2096, 8443:
return "wss"
default:
return "unknown"
}
}
// 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 *PortMatcher) Apply(dest v2net.Destination) bool {
return this.port.Contains(dest.Port())
}
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
}