95 lines
1.8 KiB
Go
95 lines
1.8 KiB
Go
|
package proxy
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net"
|
||
|
|
"strconv"
|
||
|
|
)
|
||
|
|
|
||
|
|
var _ TCP = (*tcp)(nil)
|
||
|
|
|
||
|
|
type TCPArgs struct {
|
||
|
|
Local string //监听地址
|
||
|
|
Parent string //被代理地址
|
||
|
|
Timeout int //拨号超时(毫秒)
|
||
|
|
OutCallback func() bool //回调 //是否允许代理
|
||
|
|
}
|
||
|
|
|
||
|
|
type TCP interface {
|
||
|
|
Start() (err error)
|
||
|
|
Close()
|
||
|
|
|
||
|
|
callback(inConn net.Conn)
|
||
|
|
outToTCP(inConn net.Conn) (err error)
|
||
|
|
}
|
||
|
|
|
||
|
|
type tcp struct {
|
||
|
|
inConn net.Conn
|
||
|
|
outConn net.Conn
|
||
|
|
listen Listener
|
||
|
|
cfg TCPArgs
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *tcp) Start() (err error) {
|
||
|
|
host, port, _ := net.SplitHostPort(s.cfg.Local)
|
||
|
|
p, _ := strconv.Atoi(port)
|
||
|
|
s.listen = NewListener(host, p)
|
||
|
|
err = s.listen.ListenTCP(s.callback)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *tcp) Close() {
|
||
|
|
if s.inConn != nil {
|
||
|
|
CloseConn(s.inConn)
|
||
|
|
}
|
||
|
|
if s.outConn != nil {
|
||
|
|
CloseConn(s.outConn)
|
||
|
|
}
|
||
|
|
_ = s.listen.CloseListen()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *tcp) callback(inConn net.Conn) {
|
||
|
|
defer func() {
|
||
|
|
if err := recover(); err != nil {
|
||
|
|
logger.Sugar().Infof("conn handler crashed with err : %s", err)
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
|
||
|
|
if s.cfg.OutCallback != nil {
|
||
|
|
if !s.cfg.OutCallback() {
|
||
|
|
CloseConn(inConn)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
err := s.outToTCP(inConn)
|
||
|
|
if err != nil {
|
||
|
|
CloseConn(inConn)
|
||
|
|
}
|
||
|
|
|
||
|
|
s.inConn = inConn
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *tcp) outToTCP(inConn net.Conn) error {
|
||
|
|
outConn, err := ConnectHost(s.cfg.Parent, s.cfg.Timeout)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
inAddr := inConn.RemoteAddr().String()
|
||
|
|
inLocalAddr := inConn.LocalAddr().String()
|
||
|
|
outAddr := outConn.RemoteAddr().String()
|
||
|
|
outLocalAddr := outConn.LocalAddr().String()
|
||
|
|
IoBind(inConn, outConn, func(isSrcErr bool, err error) {
|
||
|
|
CloseConn(inConn)
|
||
|
|
CloseConn(outConn)
|
||
|
|
logger.Sugar().Infof("conn %s - %s - %s -%s released", inAddr, inLocalAddr, outLocalAddr, outAddr)
|
||
|
|
}, func(n int, d bool) {}, 0)
|
||
|
|
|
||
|
|
logger.Sugar().Infof("conn %s - %s - %s -%s connected", inAddr, inLocalAddr, outLocalAddr, outAddr)
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|