优化接入网关连接

This commit is contained in:
dushixiang
2022-05-05 17:18:55 +08:00
parent f3a78761c8
commit 90751bacfc
4 changed files with 53 additions and 49 deletions

View File

@ -10,49 +10,58 @@ import (
)
type Tunnel struct {
ID string // 唯一标识
LocalHost string // 本地监听地址
LocalPort int // 本地端口
RemoteHost string // 远程连接地址
RemotePort int // 远程端口
Gateway *Gateway
ctx context.Context
cancel context.CancelFunc
listener net.Listener
err error
ID string // 唯一标识
LocalHost string // 本地监听地址
LocalPort int // 本地端口
RemoteHost string // 远程连接地址
RemotePort int // 远程端口
Gateway *Gateway
ctx context.Context
cancel context.CancelFunc
listener net.Listener
localConnections []net.Conn
remoteConnections []net.Conn
}
func (r *Tunnel) Open() {
localAddr := fmt.Sprintf("%s:%d", r.LocalHost, r.LocalPort)
for {
select {
case <-r.ctx.Done():
_ = r.listener.Close()
log.Debugf("SSH 隧道 %v 关闭", localAddr)
return
default:
log.Debugf("等待客户端访问 %v", localAddr)
localConn, err := r.listener.Accept()
if err != nil {
log.Debugf("接受连接失败 %v", err.Error())
continue
}
log.Debugf("客户端 %v 连接至 %v", localConn.RemoteAddr().String(), localAddr)
remoteAddr := fmt.Sprintf("%s:%d", r.RemoteHost, r.RemotePort)
log.Debugf("连接远程主机 %v ...", remoteAddr)
remoteConn, err := r.Gateway.SshClient.Dial("tcp", remoteAddr)
if err != nil {
log.Debugf("连接远程主机 %v 失败", remoteAddr)
r.err = err
return
}
log.Debugf("连接远程主机 %v 成功", remoteAddr)
go copyConn(localConn, remoteConn)
go copyConn(remoteConn, localConn)
log.Debugf("转发数据 [%v]->[%v]", localAddr, remoteAddr)
go func() {
<-r.ctx.Done()
_ = r.listener.Close()
for i := range r.localConnections {
_ = r.localConnections[i].Close()
}
r.localConnections = nil
for i := range r.remoteConnections {
_ = r.remoteConnections[i].Close()
}
r.remoteConnections = nil
log.Debugf("SSH 隧道 %v 关闭", localAddr)
}()
for {
log.Debugf("等待客户端访问 %v", localAddr)
localConn, err := r.listener.Accept()
if err != nil {
log.Debugf("接受连接失败 %v, 退出循环", err.Error())
return
}
r.localConnections = append(r.localConnections, localConn)
log.Debugf("客户端 %v 连接至 %v", localConn.RemoteAddr().String(), localAddr)
remoteAddr := fmt.Sprintf("%s:%d", r.RemoteHost, r.RemotePort)
log.Debugf("连接远程主机 %v ...", remoteAddr)
remoteConn, err := r.Gateway.SshClient.Dial("tcp", remoteAddr)
if err != nil {
log.Debugf("连接远程主机 %v 失败", remoteAddr)
return
}
r.remoteConnections = append(r.remoteConnections, remoteConn)
log.Debugf("连接远程主机 %v 成功", remoteAddr)
go copyConn(localConn, remoteConn)
go copyConn(remoteConn, localConn)
log.Debugf("转发数据 [%v]->[%v]", localAddr, remoteAddr)
}
}