// NewConnection create a new KCP connection between local and remote.
func NewConnection(conv uint16, writerCloser io.WriteCloser, local *net.UDPAddr, remote *net.UDPAddr, block internet.Authenticator, config *Config) *Connection {
log.Info("KCP|Connection: creating connection ", conv)
conn := new(Connection)
conn.local = local
conn.remote = remote
conn.block = block
conn.writer = writerCloser
conn.since = nowMillisec()
conn.dataInputCond = sync.NewCond(new(sync.Mutex))
conn.dataOutputCond = sync.NewCond(new(sync.Mutex))
conn.Config = config
authWriter := &AuthenticationWriter{
Authenticator: block,
Writer: writerCloser,
Config: config,
}
conn.conv = conv
conn.output = NewSegmentWriter(authWriter)
conn.mss = authWriter.Mtu() - DataSegmentOverhead
conn.roundTrip = &RoundTripInfo{
rto: 100,
minRtt: config.Tti.GetValue(),
}
conn.interval = config.Tti.GetValue()
conn.receivingWorker = NewReceivingWorker(conn)
conn.congestionControl = config.Congestion
conn.sendingWorker = NewSendingWorker(conn)
isTerminating := func() bool {
return conn.State().Is(StateTerminating, StateTerminated)
}
isTerminated := func() bool {
return conn.State() == StateTerminated
}
conn.dataUpdater = NewUpdater(
conn.interval,
predicate.Not(isTerminating).And(predicate.Any(conn.sendingWorker.UpdateNecessary, conn.receivingWorker.UpdateNecessary)),
isTerminating,
conn.updateTask)
conn.pingUpdater = NewUpdater(
5000, // 5 seconds
predicate.Not(isTerminated),
isTerminated,
conn.updateTask)
conn.pingUpdater.WakeUp()
return conn
}
// NewConnection create a new KCP connection between local and remote.
func NewConnection(conv uint16, sysConn SystemConnection, recycler internal.ConnectionRecyler, config *Config) *Connection {
log.Info("KCP|Connection: creating connection ", conv)
conn := &Connection{
conv: conv,
conn: sysConn,
connRecycler: recycler,
since: nowMillisec(),
dataInput: make(chan bool, 1),
dataOutput: make(chan bool, 1),
Config: config,
output: NewSegmentWriter(sysConn, config.GetMtu().GetValue()-uint32(sysConn.Overhead())),
mss: config.GetMtu().GetValue() - uint32(sysConn.Overhead()) - DataSegmentOverhead,
roundTrip: &RoundTripInfo{
rto: 100,
minRtt: config.Tti.GetValue(),
},
}
sysConn.Reset(conn.Input)
conn.receivingWorker = NewReceivingWorker(conn)
conn.sendingWorker = NewSendingWorker(conn)
isTerminating := func() bool {
return conn.State().Is(StateTerminating, StateTerminated)
}
isTerminated := func() bool {
return conn.State() == StateTerminated
}
conn.dataUpdater = NewUpdater(
config.Tti.GetValue(),
predicate.Not(isTerminating).And(predicate.Any(conn.sendingWorker.UpdateNecessary, conn.receivingWorker.UpdateNecessary)),
isTerminating,
conn.updateTask)
conn.pingUpdater = NewUpdater(
5000, // 5 seconds
predicate.Not(isTerminated),
isTerminated,
conn.updateTask)
conn.pingUpdater.WakeUp()
return conn
}