78 lines
1.4 KiB
Go
78 lines
1.4 KiB
Go
package app
|
|
|
|
import (
|
|
"git.makemake.in/test/mycommon/mylog"
|
|
"io"
|
|
"math/rand"
|
|
"net"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
func Run() {
|
|
rand.Seed(time.Now().UnixNano())
|
|
|
|
for name, item := range ProxyMap {
|
|
go listenTcp(name, item)
|
|
}
|
|
|
|
select {}
|
|
}
|
|
|
|
func listenTcp(name string, item ProxyItem) {
|
|
|
|
listen, err := net.Listen("tcp", item.LocalAddr)
|
|
if err != nil {
|
|
mylog.Errorf("[%s] listen err: %s", name, err)
|
|
return
|
|
}
|
|
|
|
mylog.Infof("[%s] listen %s", name, item.LocalAddr)
|
|
|
|
for {
|
|
localConn, err := listen.Accept()
|
|
if err != nil {
|
|
mylog.Errorf("conn accept err: %s", item.LocalAddr, err)
|
|
return
|
|
}
|
|
|
|
go proxyTcp(localConn, item)
|
|
}
|
|
}
|
|
|
|
func proxyTcp(localConn net.Conn, item ProxyItem) {
|
|
randRemoteAddr := item.RemoteAddr[rand.Intn(len(item.RemoteAddr))]
|
|
|
|
remoteConn, err := net.DialTimeout("tcp", randRemoteAddr, time.Second*3)
|
|
if err != nil {
|
|
localConn.Close()
|
|
mylog.Errorf("connect remote err: %s", err)
|
|
return
|
|
}
|
|
|
|
mylog.Infof("start proxy %s -> %s", localConn.RemoteAddr(), randRemoteAddr)
|
|
|
|
wg0 := &sync.WaitGroup{}
|
|
wg0.Add(2)
|
|
go copyConn(wg0, localConn, remoteConn)
|
|
go copyConn(wg0, remoteConn, localConn)
|
|
wg0.Wait()
|
|
|
|
mylog.Infof("stop proxy %s -> %s", localConn.RemoteAddr(), randRemoteAddr)
|
|
|
|
}
|
|
|
|
func copyConn(wg0 *sync.WaitGroup, localConn, remoteConn net.Conn) {
|
|
defer func() {
|
|
wg0.Done()
|
|
localConn.Close()
|
|
remoteConn.Close()
|
|
}()
|
|
|
|
_, err := io.Copy(remoteConn, localConn)
|
|
if err != nil {
|
|
mylog.Error(err)
|
|
}
|
|
|
|
}
|