func iNewLspClient(hostport string, params *LspParams) (*LspClient, error) {
client := new(LspClient)
client.WBchan = make(chan *LspMessage, 1)
client.Echan = make(chan int, 1)
client.EchanBack = make(chan int, 1)
client.Rchan = make(chan int)
client.Wchan = make(chan int, 1)
client.CloseChan = make(chan int, 1)
client.CloseChanEpoch = make(chan int, 1)
client.CloseNetworkChan = make(chan int, 1)
client.RBchan = make(chan *LspMessage)
client.eventHandClosedChan = make(chan int, 1)
client.Nchan = make(chan *LspMessage, 1)
client.established = make(chan int)
client.writeEnded = make(chan int, 1)
client.writeList = new(list.List)
client.readList = new(list.List)
client.errChan = make(chan error, 1)
client.exitEpochHandler = make(chan int, 1)
client.continueEpochHandler = make(chan int, 1)
client.AckWrite = true
client.allowWrite = true
client.sn = 1
client.rcvn = 1
client.id = 0
client.NbWrite = 0
if params == nil {
client.params = &LspParams{5, 2000}
} else {
client.params = params
}
addr, errResolve := lspnet.ResolveUDPAddr("udp", hostport)
if errResolve != nil {
return nil, errResolve
}
connexion, errDial := lspnet.DialUDP("udp", nil, addr)
if errDial != nil {
return nil, errDial
}
client.conn = connexion
client.running = true
msg, _ := buildMSG(MsgCONNECT, 0, 0, nil)
client.writeList.PushBack(msg)
client.NbWrite++
client.lastWrite = msg
client.Wchan <- 1
client.epochCount = 0
client.eventHandClosed = false
go NetworkHandlerClient(client)
go EpochHandlerClient(client)
go EventHandlerClient(client)
<-client.established
return client, nil
}
func iNewLspClient(hostport string, params *LspParams) (*LspClient, error) {
cli := new(LspClient)
if params == nil {
// Insert default parameters
params = &LspParams{5, 2000}
}
cli.params = params
addr, err := lspnet.ResolveUDPAddr("udp", hostport)
if lsplog.CheckReport(1, err) {
return nil, err
}
cli.lspConn = newConn(addr, 0, 0)
// Client's first received message will be data message.
cli.lspConn.nextRecvSeqNum = NextSeqNum(0)
cli.udpConn, err = lspnet.DialUDP("udp", nil, addr)
if lsplog.CheckReport(1, err) {
return nil, err
}
// Need enough room to recycle close messages at end
cli.appReadChan = make(LspMessageChan, 2)
cli.readBuf = NewBuf()
cli.appWriteChan = make(LspMessageChan, 1)
cli.netInChan = make(LspMessageChan, 1)
cli.epochChan = make(chan int)
cli.closeReplyChan = make(chan error, 2)
cli.writeReplyChan = make(chan error, 2)
go cli.clientLoop()
go cli.udpReader()
go epochTrigger(cli.params.EpochMilliseconds, cli.epochChan, &cli.lspConn.stopNetworkFlag)
// Send connection request to server
nm := GenConnectMessage()
cli.udpWrite(nm)
cli.lspConn.pendingMsg = nm
cli.lspConn.nextSendSeqNum = NextSeqNum(0)
cm := <-cli.appReadChan
if cm.Type == MsgCONNECT {
return cli, nil
}
return nil, lsplog.MakeErr("Connection failed")
}