func (t *Tunnel) HandlePublicConnection(publicConn conn.Conn) {
defer publicConn.Close()
defer func() {
if r := recover(); r != nil {
publicConn.Warn("HandlePublicConnection failed with error %v", r)
}
}()
startTime := time.Now()
metrics.OpenConnection(t, publicConn)
var proxyConn conn.Conn
var err error
for i := 0; i < (2 * proxyMaxPoolSize); i++ {
// get a proxy connection
if proxyConn, err = t.ctl.GetProxy(); err != nil {
t.Warn("Failed to get proxy connection: %v", err)
return
}
defer proxyConn.Close()
t.Info("Got proxy connection %s", proxyConn.Id())
proxyConn.AddLogPrefix(t.Id())
// tell the client we're going to start using this proxy connection
startPxyMsg := &msg.StartProxy{
Url: t.url,
ClientAddr: publicConn.RemoteAddr().String(),
}
if err = msg.WriteMsg(proxyConn, startPxyMsg); err != nil {
proxyConn.Warn("Failed to write StartProxyMessage: %v, attempt %d", err, i)
proxyConn.Close()
} else {
// success
break
}
}
if err != nil {
// give up
publicConn.Error("Too many failures starting proxy connection")
return
}
// To reduce latency handling tunnel connections, we employ the following curde heuristic:
// Whenever we take a proxy connection from the pool, replace it with a new one
util.PanicToError(func() { t.ctl.out <- &msg.ReqProxy{} })
// no timeouts while connections are joined
proxyConn.SetDeadline(time.Time{})
// join the public and proxy connections
bytesIn, bytesOut := conn.Join(publicConn, proxyConn)
metrics.CloseConnection(t, publicConn, startTime, bytesIn, bytesOut)
//log.Info("Proxy authId=%s bytesIn=%d, bytesOut=%d\n", t.ctl.userInfo.Uc.UserId, bytesIn, bytesOut)
atomic.AddInt32(&t.ctl.userInfo.TransPerDay, int32(bytesIn+bytesOut))
atomic.AddInt32(&t.ctl.userInfo.TransAll, int32(bytesIn+bytesOut))
}
func (t *Tunnel) HandlePublicConnection(publicConn conn.Conn) {
defer publicConn.Close()
defer func() {
if r := recover(); r != nil {
publicConn.Warn("HandlePublicConnection failed with error %v", r)
}
}()
startTime := time.Now()
metrics.OpenConnection(t, publicConn)
var proxyConn conn.Conn
var attempts int
var err error
for {
// get a proxy connection
if proxyConn, err = t.ctl.GetProxy(); err != nil {
t.Warn("Failed to get proxy connection: %v", err)
return
}
defer proxyConn.Close()
t.Info("Got proxy connection %s", proxyConn.Id())
proxyConn.AddLogPrefix(t.Id())
// tell the client we're going to start using this proxy connection
startPxyMsg := &msg.StartProxy{
Url: t.url,
ClientAddr: publicConn.RemoteAddr().String(),
}
if err = msg.WriteMsg(proxyConn, startPxyMsg); err != nil {
attempts += 1
proxyConn.Warn("Failed to write StartProxyMessage: %v, attempt %d", err, attempts)
if attempts > 3 {
// give up
publicConn.Error("Too many failures starting proxy connection")
return
}
} else {
// success
break
}
}
// join the public and proxy connections
bytesIn, bytesOut := conn.Join(publicConn, proxyConn)
metrics.CloseConnection(t, publicConn, startTime, bytesIn, bytesOut)
}