func main() {
log.Println("testing...")
usage := `relay
Usage:
relay [--external=<interface> --internal=<destination>]
relay -h | --help
relay --version
Options:
-h --help Show this screen.
--version Show version.
--external=<interface> Interface to listen on [default: localhost:9999].
--internal=<destination> Destination to forward to [default: localhost:9998].`
arguments, _ := docopt.Parse(usage, nil, true, "Relay v1.0.0", false)
log.Println(arguments)
external := common.ArgOrDefault("--external", "localhost:9998", arguments)
internal := common.ArgOrDefault("--internal", "localhost:9999", arguments)
log.Println("Listening to external", external)
externalListener := listenOrExit(external)
defer externalListener.Close()
log.Println("Listening to internal", internal)
internalListener := listenOrExit(internal)
defer internalListener.Close()
externalConnectionsCh := make(chan net.Conn, 100)
internalConnectionsCh := make(chan net.Conn, 100)
externalConnectionsQueue := &ConnectionQueue{nodes: make([]net.Conn, 3)}
internalConnectionsQueue := &ConnectionQueue{nodes: make([]net.Conn, 3)}
go getConnections(externalListener, externalConnectionsCh)
go getConnections(internalListener, internalConnectionsCh)
log.Println("Starting main run loop.")
for {
select {
case externalConnection := <-externalConnectionsCh:
{
externalConnectionsQueue.Push(externalConnection)
}
case internalConnection := <-internalConnectionsCh:
{
internalConnectionsQueue.Push(internalConnection)
}
case <-time.After(10 * time.Second):
log.Println("No connections, tick")
}
// NKG: It is important to note that there isn't any code that checks
// to see if the connections are still open/active once they've been
// put into the queue.
if externalConnectionsQueue.Size() > 0 && internalConnectionsQueue.Size() > 0 {
externalConnection := externalConnectionsQueue.Pop()
internalConnection := internalConnectionsQueue.Pop()
go relayPair(externalConnection, internalConnection)
}
}
}
func main() {
usage := `echoserver
Usage:
echoserver [--listen=<interface>]
echoserver -h | --help
echoserver --version
Options:
-h --help Show this screen.
--version Show version.
--listen=<interface> Interface to listen on [default: localhost:9998].`
arguments, _ := docopt.Parse(usage, nil, true, "echoserver v1.0.0", false)
listen := common.ArgOrDefault("--listen", "localhost:9998", arguments)
// id to bool (true if has received activity)
connections := make(map[int]bool)
connectionPairs := make(chan ConnectionPair, 100)
connectionActivity := make(chan int, 100)
closedConnections := make(chan int, 100)
lastId := 0
for {
select {
case connection, ok := <-connectionPairs:
{
if !ok {
return
}
connections[connection.id] = false
go echoFunc(connection.conn)
}
case connection, ok := <-connectionActivity:
{
if !ok {
return
}
connections[connection] = true
}
case connection, ok := <-closedConnections:
{
if !ok {
return
}
delete(connections, connection)
}
case <-time.After(10 * time.Second):
{
count := 0
for _, hasReceivedData := range connections {
if hasReceivedData {
count++
}
}
if count == len(connections) {
for i := 0; i < 3; i++ {
lastId++
createConn(listen, lastId, connectionPairs)
}
}
}
}
}
}
