mirror of https://github.com/v2fly/v2ray-core.git
126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
package socks
|
|
|
|
import (
|
|
"context"
|
|
"runtime"
|
|
"time"
|
|
|
|
"v2ray.com/core/common"
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/common/protocol"
|
|
"v2ray.com/core/common/retry"
|
|
"v2ray.com/core/common/signal"
|
|
"v2ray.com/core/proxy"
|
|
"v2ray.com/core/transport/internet"
|
|
"v2ray.com/core/transport/ray"
|
|
)
|
|
|
|
type Client struct {
|
|
serverPicker protocol.ServerPicker
|
|
}
|
|
|
|
func NewClient(ctx context.Context, config *ClientConfig) (*Client, error) {
|
|
serverList := protocol.NewServerList()
|
|
for _, rec := range config.Server {
|
|
serverList.AddServer(protocol.NewServerSpecFromPB(*rec))
|
|
}
|
|
client := &Client{
|
|
serverPicker: protocol.NewRoundRobinServerPicker(serverList),
|
|
}
|
|
|
|
return client, nil
|
|
}
|
|
|
|
func (c *Client) Process(ctx context.Context, ray ray.OutboundRay, dialer proxy.Dialer) error {
|
|
destination, ok := proxy.TargetFromContext(ctx)
|
|
if !ok {
|
|
return newError("target not specified.")
|
|
}
|
|
|
|
var server *protocol.ServerSpec
|
|
var conn internet.Connection
|
|
|
|
err := retry.ExponentialBackoff(5, 100).On(func() error {
|
|
server = c.serverPicker.PickServer()
|
|
dest := server.Destination()
|
|
rawConn, err := dialer.Dial(ctx, dest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
conn = rawConn
|
|
|
|
return nil
|
|
})
|
|
|
|
if err != nil {
|
|
return newError("failed to find an available destination").Base(err)
|
|
}
|
|
|
|
defer conn.Close()
|
|
|
|
request := &protocol.RequestHeader{
|
|
Version: socks5Version,
|
|
Command: protocol.RequestCommandTCP,
|
|
Address: destination.Address,
|
|
Port: destination.Port,
|
|
}
|
|
if destination.Network == net.Network_UDP {
|
|
request.Command = protocol.RequestCommandUDP
|
|
}
|
|
|
|
user := server.PickUser()
|
|
if user != nil {
|
|
request.User = user
|
|
}
|
|
|
|
udpRequest, err := ClientHandshake(request, conn, conn)
|
|
if err != nil {
|
|
return newError("failed to establish connection to server").AtWarning().Base(err)
|
|
}
|
|
|
|
ctx, timer := signal.CancelAfterInactivity(ctx, time.Minute*2)
|
|
|
|
var requestFunc func() error
|
|
var responseFunc func() error
|
|
if request.Command == protocol.RequestCommandTCP {
|
|
requestFunc = func() error {
|
|
return buf.PipeUntilEOF(timer, ray.OutboundInput(), buf.NewWriter(conn))
|
|
}
|
|
responseFunc = func() error {
|
|
defer ray.OutboundOutput().Close()
|
|
return buf.PipeUntilEOF(timer, buf.NewReader(conn), ray.OutboundOutput())
|
|
}
|
|
} else if request.Command == protocol.RequestCommandUDP {
|
|
udpConn, err := dialer.Dial(ctx, udpRequest.Destination())
|
|
if err != nil {
|
|
return newError("failed to create UDP connection").Base(err)
|
|
}
|
|
defer udpConn.Close()
|
|
requestFunc = func() error {
|
|
return buf.PipeUntilEOF(timer, ray.OutboundInput(), &UDPWriter{request: request, writer: udpConn})
|
|
}
|
|
responseFunc = func() error {
|
|
defer ray.OutboundOutput().Close()
|
|
reader := &UDPReader{reader: udpConn}
|
|
return buf.PipeUntilEOF(timer, reader, ray.OutboundOutput())
|
|
}
|
|
}
|
|
|
|
requestDone := signal.ExecuteAsync(requestFunc)
|
|
responseDone := signal.ExecuteAsync(responseFunc)
|
|
if err := signal.ErrorOrFinish2(ctx, requestDone, responseDone); err != nil {
|
|
return newError("connection ends").Base(err)
|
|
}
|
|
|
|
runtime.KeepAlive(timer)
|
|
|
|
return nil
|
|
}
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*ClientConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
return NewClient(ctx, config.(*ClientConfig))
|
|
}))
|
|
}
|