func (s *Server) serveBusLine(conn net.Conn) {
log.I("Busline opened: ", conn.RemoteAddr())
s.bridge.RunBusLine(conn)
log.I("Busline closed: ", conn.RemoteAddr())
}
func handleConn(conn net.Conn) {
log.I("Bridge accept: ", conn.RemoteAddr())
remote, err := net.Dial("tcp", "127.0.0.1:1080")
if err != nil {
log.W("Cannot dail remote ", err)
conn.Close()
return
}
go core.ConnCopy(conn, remote)
core.ConnCopy(remote, conn)
log.I("Bridge closed: ", conn.RemoteAddr())
}
// TODO add chan to inform bridge closed
func (f *Flow) runFlowControl() {
heap := heap.New()
for {
msg := <-f.recv
heap.Push(msg)
ack := f.ack
for !heap.Empty() {
msg := heap.Top().(*Message)
if msg.seq != ack+1 {
break
}
heap.Pop()
ack = msg.seq
ch, ok := f.bridge.BusChannel(msg.channel)
if !ok {
if msg.syn {
// new channel to accept
if f.bridge.canAccept {
conn := f.bridge.NewChannel(msg.channel)
select {
case f.bridge.AcceptChan <- conn:
log.I("new channel opened: ", msg.channel)
default:
conn.Close()
log.I("new channel denied: ", msg.channel)
}
continue
}
}
// channel not found, ignored
log.I("ignore packet from unknown channel: ", msg.channel)
continue
}
log.D("dispatch msg to channel ", msg.channel)
trySend(ch, msg)
}
f.setAck(ack)
// TODO set timeout to send extra ack packet
}
}
func (c *Client) runBusLine(addr Addr) {
// TODO use config param
for {
conn, err := net.Dial("tcp", addr.String())
if err != nil {
log.E("Busline failed: ", err)
time.Sleep(time.Second * 2)
continue
}
log.I("Busline established: ", addr)
c.bridge.RunBusLine(conn)
log.I("Busline closed: ", addr, " , reconnect")
}
}
func run(listenAddr string) {
listener, err := net.Listen("tcp", listenAddr)
if err != nil {
log.F(err)
}
log.I("Start listening at " + listenAddr)
for {
conn, err := listener.Accept()
if err != nil {
log.E("accept: ", err)
continue
}
log.I("Accept connection " + conn.RemoteAddr().String())
go handleConn(conn)
}
}
func handleConn(conn net.Conn) {
remote, err := client.Dial()
if err != nil {
log.W("Cannot dail remote")
conn.Close()
return
}
go core.ConnCopy(conn, remote)
core.ConnCopy(remote, conn)
log.I("Close connection " + conn.RemoteAddr().String())
}
func run() {
err := server.Listen(bridge.Addr{"127.0.0.1", 8000})
if err != nil {
log.F("Bridge listen: ", err)
}
log.I("Start listening")
for {
conn, err := server.Accept()
if err != nil {
log.E("Bridge accept: ", err)
continue
}
go handleConn(conn)
}
}