func handleClient(source *net.TCPConn) {
atomic.AddInt32(&daemon.status.actives, 1)
defer func() {
atomic.AddInt32(&daemon.status.actives, -1)
daemon.wg.Done()
}()
// read req
err, req := ReadReq(source)
if err != nil {
source.Close()
Error("conn:%v, read req failed:%v", source.RemoteAddr(), err)
return
}
source.SetKeepAlive(true)
source.SetKeepAlivePeriod(time.Second * 60)
source.SetLinger(-1)
// judge: new conn or reuse conn
switch req := req.(type) {
case *NewConnReq:
Info("new conn request:%v", req)
onNewConn(source, req)
case *ReuseConnReq:
Info("reuse conn request:%v", req)
onReuseConn(source, req)
default:
Info("unknown request:%v", req)
source.Close()
return
}
}
func (h *Hub) startLink(l *link, conn *net.TCPConn) {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second * 60)
l.setConn(conn)
Info("link(%d) start: %v", l.id, conn.RemoteAddr())
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
for {
data, err := l.read()
if err != nil {
if err != errPeerClosed {
h.SendCmd(l.id, LINK_CLOSE_SEND)
}
break
}
h.Send(l.id, data)
}
}()
wg.Add(1)
go func() {
defer wg.Done()
err := l._write()
if err != errPeerClosed {
h.SendCmd(l.id, LINK_CLOSE_RECV)
}
}()
wg.Wait()
Info("link(%d) close", l.id)
}
func handleClient(pf *PF, source *net.TCPConn) {
atomic.AddInt32(&pf.status.actives, 1)
defer func() {
atomic.AddInt32(&pf.status.actives, -1)
pf.wg.Done()
}()
settings := pf.settings
host := chooseHost(settings.weight, settings.Hosts)
if host == nil {
source.Close()
logger.Println("choose host failed")
return
}
dest, err := net.DialTCP("tcp", nil, host.addr)
if err != nil {
source.Close()
logger.Printf("connect to %s failed: %s", host.addr, err.Error())
return
}
source.SetKeepAlive(true)
source.SetKeepAlivePeriod(time.Second * 60)
source.SetLinger(-1)
dest.SetLinger(-1)
go forward(source, dest)
forward(dest, source)
//logger.Printf("forward finished, %v -> %v", source.RemoteAddr(), host)
}
func (this *GoServer) SetDefaultOptions(conn *net.TCPConn) {
conn.SetKeepAlive(true)
interval, err := time.ParseDuration("45s")
if err != nil {
conn.SetKeepAlivePeriod(interval)
}
conn.SetNoDelay(true)
}
func (server *TcpServer) Start() (err error) {
for {
var conn *net.TCPConn
if conn, err = server.TCPListener.AcceptTCP(); err != nil {
return err
}
if server.keepAlive != nil {
if err := conn.SetKeepAlive(server.keepAlive.(bool)); err != nil {
return err
}
}
if server.keepAlivePeriod != nil {
if err := conn.SetKeepAlivePeriod(server.keepAlivePeriod.(time.Duration)); err != nil {
return err
}
}
if server.linger != nil {
if err := conn.SetLinger(server.linger.(int)); err != nil {
return err
}
}
if server.noDelay != nil {
if err := conn.SetNoDelay(server.noDelay.(bool)); err != nil {
return err
}
}
if server.readBuffer != nil {
if err := conn.SetReadBuffer(server.readBuffer.(int)); err != nil {
return err
}
}
if server.writerBuffer != nil {
if err := conn.SetWriteBuffer(server.writerBuffer.(int)); err != nil {
return err
}
}
if server.deadline != nil {
if err := conn.SetDeadline(server.deadline.(time.Time)); err != nil {
return err
}
}
if server.readDeadline != nil {
if err := conn.SetReadDeadline(server.readDeadline.(time.Time)); err != nil {
return err
}
}
if server.writerDeadline != nil {
if err := conn.SetWriteDeadline(server.writerDeadline.(time.Time)); err != nil {
return err
}
}
if server.config != nil {
server.ServeTCP(tls.Client(conn, server.config))
} else {
server.ServeTCP(conn)
}
}
}
func newTunnel(conn *net.TCPConn) *Tunnel {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second * 10) //we do not keep so long
var tun Tunnel
tun.Conn = &Conn{conn, bufio.NewReaderSize(conn, PacketSize), bufio.NewWriterSize(conn, PacketSize), nil, nil}
Info("new tunnel:%s", tun)
return &tun
}
func newTunnel(conn *net.TCPConn) *Tunnel {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second * 180)
var tun Tunnel
tun.Conn = &Conn{conn, bufio.NewReaderSize(conn, 64*1024), bufio.NewWriterSize(conn, 64*1024), nil, nil}
Info("new tunnel:%s", tun)
return &tun
}
func NewConnectionFromTCPConn(socket *net.TCPConn, cm *ConnectionManager, count uint32) *Connection {
socket.SetKeepAlive(true)
socket.SetKeepAlivePeriod(time.Second)
conn := &Connection{
socket: socket,
connectionManager: cm,
ConnectionNumber: count,
}
conn.start()
return conn
}
func setTCPOptions(conn *net.TCPConn) {
var err error
if err = conn.SetLinger(0); err != nil {
l.Infoln(err)
}
if err = conn.SetNoDelay(false); err != nil {
l.Infoln(err)
}
if err = conn.SetKeepAlivePeriod(60 * time.Second); err != nil {
l.Infoln(err)
}
if err = conn.SetKeepAlive(true); err != nil {
l.Infoln(err)
}
}
func (link *Link) Pump(conn *net.TCPConn) {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second * 60)
link.conn = conn
link.wg.Add(1)
go link.pumpIn()
link.wg.Add(1)
go link.pumpOut()
link.wg.Wait()
Info("link(%d) closed", link.id)
link.hub.deleteLink(link.id)
}
func newTunnel(conn *net.TCPConn) *Tunnel {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second * 60)
conn.SetLinger(-1)
// conn.SetWriteBuffer(64 * 1024)
// conn.SetReadBuffer(64 * 1024)
desc := fmt.Sprintf("tunnel[%s <-> %s]", conn.LocalAddr(), conn.RemoteAddr())
return &Tunnel{
wlock: new(sync.Mutex),
writer: NewRC4Writer(conn, options.RC4Key),
rlock: new(sync.Mutex),
reader: NewRC4Reader(bufio.NewReaderSize(conn, 8192), options.RC4Key),
conn: conn,
desc: desc,
}
}
// SetTCPOptions sets syncthings default TCP options on a TCP connection
func SetTCPOptions(conn *net.TCPConn) error {
var err error
if err = conn.SetLinger(0); err != nil {
return err
}
if err = conn.SetNoDelay(false); err != nil {
return err
}
if err = conn.SetKeepAlivePeriod(60 * time.Second); err != nil {
return err
}
if err = conn.SetKeepAlive(true); err != nil {
return err
}
return nil
}
func (p *Proxy) proxyTCPStream(ctx context.Context, src *net.TCPConn) {
srcRemoteAddr := src.RemoteAddr().(*net.TCPAddr)
srcLocalAddr := src.LocalAddr().(*net.TCPAddr)
route := p.routes.GetTable().Lookup(protocols.TCP,
srcRemoteAddr.IP, srcLocalAddr.IP,
uint16(srcRemoteAddr.Port), uint16(srcLocalAddr.Port))
if route == nil {
src.Close()
return
}
go func() {
dstAddr := net.TCPAddr{
IP: route.Outbound.DstIP,
Port: int(route.Outbound.DstPort),
}
dst, err := net.DialTCP("tcp", nil, &dstAddr)
if err != nil {
src.Close()
return
}
dst.SetKeepAlivePeriod(10 * time.Second)
src.SetKeepAlivePeriod(10 * time.Second)
go func() {
<-ctx.Done()
src.Close()
dst.Close()
}()
go func() {
defer dst.CloseWrite()
defer src.CloseRead()
io.Copy(dst, src)
}()
go func() {
defer src.CloseWrite()
defer dst.CloseRead()
io.Copy(src, dst)
}()
}()
}
// readDiamondMetrics reads from the connection
func (d *Diamond) readDiamondMetrics(conn *net.TCPConn) {
defer conn.Close()
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second)
reader := bufio.NewReader(conn)
d.log.Info("Connection started: ", conn.RemoteAddr())
for {
line, err := reader.ReadBytes('\n')
if err != nil {
d.log.Warn("Error while reading diamond metrics", err)
break
}
d.log.Debug("Read: ", string(line))
d.incoming <- line
}
d.log.Info("Connection closed: ", conn.RemoteAddr())
}
// readDiamondMetrics reads from the connection
func (d Diamond) readDiamondMetrics(conn *net.TCPConn) {
defer conn.Close()
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second)
reader := bufio.NewReader(conn)
log.Info("Diamond collector connection started: ", conn.RemoteAddr())
for {
// TODO: verify that timeout is actually working.
conn.SetDeadline(time.Now().Add(1e9))
line, err := reader.ReadBytes('\n')
if err != nil {
break
}
log.Debug("Read from Diamond collector: ", string(line))
d.incoming <- line
}
log.Info("Diamond collector connection closed: ", conn.RemoteAddr())
}
func handleConn(source *net.TCPConn) {
var destList []*DestList
source.SetKeepAlive(true)
source.SetKeepAlivePeriod(time.Second * 60)
for _, host := range options.hostList.HostList {
dest, err := net.Dial("tcp", host.Addr)
if err != nil {
source.Close()
log.Printf("connect to %s failed: %s", host.Addr, err.Error())
return
}
tmp := new(DestList)
tmp.Conn = dest.(*net.TCPConn)
tmp.Discard = host.Discard
destList = append(destList, tmp)
}
go sendDest(source, destList)
sendSource(destList, source)
}
func handleClient(source *net.TCPConn) {
atomic.AddInt32(&daemon.status.actives, 1)
defer func() {
atomic.AddInt32(&daemon.status.actives, -1)
daemon.wg.Done()
}()
Info("accept new connection: %v", source.RemoteAddr())
source.SetKeepAlive(true)
source.SetKeepAlivePeriod(time.Second * 60)
source.SetLinger(-1)
// read req
// set read request timeout
source.SetReadDeadline(time.Now().Add(time.Second * 30))
err, req := ReadReq(source)
if err != nil {
source.Close()
Error("conn:%v, read req failed: %v", source.RemoteAddr(), err)
return
}
// cancel read timeout
var t time.Time
source.SetReadDeadline(t)
// judge: new conn or reuse conn
switch req := req.(type) {
case *NewConnReq:
Info("new conn request:%v", req)
onNewConn(source, req)
case *ReuseConnReq:
Info("reuse conn request:%v", req)
onReuseConn(source, req)
default:
Info("unknown request:%v", req)
source.Close()
return
}
Info("connection close: %v", source.RemoteAddr())
}
func NewSession(conn *net.TCPConn, rc *turbo.RemotingConfig) *Session {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(rc.IdleTime * 2)
//禁用nagle
conn.SetNoDelay(true)
conn.SetReadBuffer(rc.ReadBufferSize)
conn.SetWriteBuffer(rc.WriteBufferSize)
session := &Session{
conn: conn,
br: bufio.NewReaderSize(conn, rc.ReadBufferSize),
bw: bufio.NewWriterSize(conn, rc.WriteBufferSize),
ReadChannel: make(chan *packet.Packet, rc.ReadChannelSize),
WriteChannel: make(chan *packet.Packet, rc.WriteChannelSize),
isClose: false,
remoteAddr: conn.RemoteAddr().String(),
rc: rc}
return session
}
func handleConn(source *net.TCPConn) {
host := chooseHost(options.backend.weight, options.backend.Hosts)
if host == nil {
source.Close()
log.Println("choose host failed")
return
}
dest, err := net.Dial("tcp", host.Addr)
if err != nil {
source.Close()
log.Printf("connect to %s failed: %s", host.Addr, err.Error())
return
}
source.SetKeepAlive(true)
source.SetKeepAlivePeriod(time.Second * 60)
go forward(source, dest.(*net.TCPConn))
forward(dest.(*net.TCPConn), source)
}
func (this *DeviceGatewayServer) deviceRoutine(waitGroup *sync.WaitGroup, socket *net.TCPConn, maxLen int) {
defer waitGroup.Done()
conn := NewConnection(socket, maxLen, this.devManager)
defer conn.Close()
// step 1. shake hands with the dev connection
deviceGid, err := conn.DeviceHandShake()
if err != nil {
if deviceGid != nil {
log.Errorf("device handshake failed exit:addr[%s], gid[%s]", socket.RemoteAddr(), deviceGid.String())
return
}
log.Errorf("device handshake failed exit:addr[%s]", socket.RemoteAddr())
return
}
// step 2. set the socket option as keep alive
socket.SetKeepAlive(true)
socket.SetKeepAlivePeriod(time.Second * 30)
// step 3. record the connection for forward manager
err = this.connManager.Insert(deviceGid, conn)
if err != nil {
log.Errorf("insert the device connection Failed:addr[%s], gid[%s], err[%v]",
socket.RemoteAddr(), deviceGid.String(), err)
return
}
// for debug info
log.Infof("device connection created:addr[%s], gid[%s]", socket.RemoteAddr(), deviceGid.String())
// step 4. loop forward all request and receive all response
conn.Loop(waitGroup)
// step 5. remove conn from device connection manager
_, find := this.connManager.Delete(deviceGid)
if !find {
log.Errorf("delete device connection before close:addr[%s], gid[%s]", socket.RemoteAddr(), deviceGid.String())
}
// for debug info
log.Infof("device connection closed:addr[%s], gid[%s]", socket.RemoteAddr(), deviceGid.String())
}
func handle_sync_client(conn *net.TCPConn) {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Duration(10 * 60 * time.Second))
client := NewSyncClient(conn)
client.Run()
}
func NewTunnel(conn *net.TCPConn) *Tunnel {
conn.SetKeepAlive(true)
conn.SetKeepAlivePeriod(time.Second * 60)
conn.SetLinger(-1)
return &Tunnel{make(chan *TunnelPayload, 65535), make(chan *TunnelPayload, 65535), conn}
}
func (c *conn) command(s string) error {
c.Lock()
defer c.Unlock()
s = strings.TrimSpace(s)
args := strings.Split(s, " ")
cmd := args[0]
args = args[1:]
switch cmd {
case "connect":
addr := strings.Split(args[0], "!")
if len(args) == 2 {
return errors.New("manual local port assignment not supported")
}
if len(addr) != 2 {
return errors.New("invalid address")
}
host := addr[0]
port, err := strconv.ParseUint(addr[1], 10, 64)
if err != nil {
return err
}
if port > 65535 {
return fmt.Errorf("invalid port: %s", addr[1])
}
// TODO(kl): Should the old connection disconnect?
c.address = fmt.Sprintf("%s:%d", host, port)
log.Printf("-> Connect: %s", c.address)
c.connectPending = true
case "announce":
if args[0] == "*" {
args[0] = "0"
}
port, err := strconv.ParseUint(args[0], 10, 64)
if err != nil {
return err
}
if port > 65535 {
return fmt.Errorf("invalid port: %s", args[0])
}
c.address = fmt.Sprintf(":%d", port)
log.Printf("-> Announce: %s", c.address)
c.listener, err = net.Listen(c.network, c.address)
c.state = stateAnnouncing
case "accept":
// Do nothing...
case "keepalive":
var tcp *net.TCPConn
var ok bool
if tcp, ok = c.conn.(*net.TCPConn); !ok {
return fmt.Errorf("keepalive only valid on tcp connections")
}
var period time.Duration
switch len(args) {
case 0:
period = 30 * time.Second
case 1:
d, err := strconv.ParseUint(args[0], 10, 64)
if err != nil {
return err
}
period = time.Duration(d) * time.Millisecond
default:
return fmt.Errorf("invalid arguments")
}
log.Printf("-> Keepalive: %v", period)
tcp.SetKeepAlivePeriod(period)
tcp.SetKeepAlive(true)
case "hangup", "reject":
c.hangup()
case "bind", "ttl", "tos", "ignoreadvice", "addmulti", "remmulti":
return fmt.Errorf("Unimplemented command received: %v", s)
case "checksum", "tcpporthogdefence":
return fmt.Errorf("Unimplemented command received: %v", s)
default:
return fmt.Errorf("Unimplemented command received: %v", s)
}
return nil
}