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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-22 18:17:52 -05:00
v2fly/proxy/shadowsocks/client.go
2016-11-02 16:17:57 +01:00

139 lines
3.4 KiB
Go

package shadowsocks
import (
"errors"
"sync"
"v2ray.com/core/common/alloc"
v2io "v2ray.com/core/common/io"
"v2ray.com/core/common/log"
v2net "v2ray.com/core/common/net"
"v2ray.com/core/common/protocol"
"v2ray.com/core/common/retry"
"v2ray.com/core/proxy"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/ray"
)
type Client struct {
serverPicker protocol.ServerPicker
meta *proxy.OutboundHandlerMeta
}
func (this *Client) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
defer payload.Release()
defer ray.OutboundInput().Release()
defer ray.OutboundOutput().Close()
network := destination.Network
var server *protocol.ServerSpec
var conn internet.Connection
err := retry.Timed(5, 100).On(func() error {
server = this.serverPicker.PickServer()
dest := server.Destination()
dest.Network = network
rawConn, err := internet.Dial(this.meta.Address, dest, this.meta.StreamSettings)
if err != nil {
return err
}
conn = rawConn
return nil
})
if err != nil {
return errors.New("Shadowsocks|Client: Failed to find an available destination:" + err.Error())
}
log.Info("Shadowsocks|Client: Tunneling request to ", destination, " via ", server.Destination())
request := &protocol.RequestHeader{
Version: Version,
Address: destination.Address,
Port: destination.Port,
}
if destination.Network == v2net.Network_TCP {
request.Command = protocol.RequestCommandTCP
} else {
request.Command = protocol.RequestCommandUDP
}
user := server.PickUser()
rawAccount, err := user.GetTypedAccount()
if err != nil {
return errors.New("Shadowsocks|Client: Failed to get a valid user account: " + err.Error())
}
account := rawAccount.(*ShadowsocksAccount)
request.User = user
if account.OneTimeAuth == Account_Auto || account.OneTimeAuth == Account_Enabled {
request.Option |= RequestOptionOneTimeAuth
}
if request.Command == protocol.RequestCommandTCP {
bufferedWriter := v2io.NewBufferedWriter(conn)
defer bufferedWriter.Release()
bodyWriter, err := WriteTCPRequest(request, bufferedWriter)
defer bodyWriter.Release()
if err != nil {
return errors.New("Shadowsock|Client: Failed to write request: " + err.Error())
}
if err := bodyWriter.Write(payload); err != nil {
return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
}
bufferedWriter.SetCached(false)
v2io.Pipe(ray.OutboundInput(), bodyWriter)
var responseMutex sync.Mutex
responseMutex.Lock()
go func() {
defer responseMutex.Unlock()
responseReader, err := ReadTCPResponse(user, conn)
if err != nil {
log.Warning("Shadowsocks|Client: Failed to read response: " + err.Error())
return
}
v2io.Pipe(responseReader, ray.OutboundOutput())
}()
responseMutex.Lock()
}
if request.Command == protocol.RequestCommandUDP {
writer := &UDPWriter{
Writer: conn,
Request: request,
}
if err := writer.Write(payload); err != nil {
return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
}
v2io.Pipe(ray.OutboundInput(), writer)
timedReader := v2net.NewTimeOutReader(16, conn)
var responseMutex sync.Mutex
responseMutex.Lock()
go func() {
defer responseMutex.Unlock()
reader := &UDPReader{
Reader: timedReader,
User: user,
}
v2io.Pipe(reader, ray.OutboundOutput())
}()
responseMutex.Lock()
}
return nil
}