func (wp *workerPool) workerFunc(ch *workerChan) {
var c net.Conn
var err error
for c = range ch.ch {
if c == nil {
break
}
if err = wp.WorkerFunc(c); err != nil && err != errHijacked {
errStr := err.Error()
if wp.LogAllErrors || !(strings.Contains(errStr, "broken pipe") ||
strings.Contains(errStr, "reset by peer") ||
strings.Contains(errStr, "i/o timeout")) {
wp.Logger.Printf("error when serving connection %q<->%q: %s", c.LocalAddr(), c.RemoteAddr(), err)
}
}
if err != errHijacked {
c.Close()
}
c = nil
if !wp.release(ch) {
break
}
}
wp.lock.Lock()
wp.workersCount--
wp.lock.Unlock()
}
// 为连接开启读写两个协程
func (self *TP) cGoConn(conn net.Conn) {
remoteAddr, connect := NewConnect(conn, self.connBufferLen, self.connWChanCap)
// 添加连接到节点池
self.connPool[self.tpClient.serverUID] = connect
if self.uid == "" {
// 设置默认UID
self.uid = conn.LocalAddr().String()
}
if !self.short {
self.send(NewNetData(self.uid, self.tpClient.serverUID, IDENTITY, ""))
log.Printf(" * —— 成功连接到服务器：%v ——", remoteAddr)
} else {
connect.Short = true
}
// 标记连接已经正式生效可用
self.connPool[self.tpClient.serverUID].Usable = true
// 开启读写双工协程
go self.cReader(self.tpClient.serverUID)
go self.cWriter(self.tpClient.serverUID)
}
// Dial establishes a connection to a log daemon by connecting to
// address raddr on the network net. Each write to the returned
// writer sends a log message with the given facility, severity and
// tag.
func Dial(network, raddr string, priority Priority, tag string) (w *Writer, err error) {
if priority < 0 || priority > LOG_LOCAL7|LOG_DEBUG {
return nil, errors.New("log/syslog: invalid priority")
}
if tag == "" {
tag = os.Args[0]
}
hostname, _ := os.Hostname()
var conn serverConn
if network == "" {
conn, err = unixSyslog()
if hostname == "" {
hostname = "localhost"
}
} else {
var c net.Conn
c, err = net.Dial(network, raddr)
conn = netConn{c}
if hostname == "" {
hostname = c.LocalAddr().String()
}
}
if err != nil {
return nil, err
}
return &Writer{priority: priority, tag: tag, hostname: hostname, conn: conn}, nil
}
func (ms *MsocksServer) Handler(conn net.Conn) {
log.Notice("connection come from: %s => %s.", conn.RemoteAddr(), conn.LocalAddr())
ti := time.AfterFunc(AUTH_TIMEOUT*time.Second, func() {
log.Notice(ErrAuthFailed.Error(), conn.RemoteAddr())
conn.Close()
})
err := ms.OnAuth(conn)
if err != nil {
log.Error("%s", err.Error())
return
}
ti.Stop()
sess := NewSession(conn)
sess.next_id = 1
sess.dialer = ms.dialer
ms.Add(sess)
defer ms.Remove(sess)
sess.Run()
log.Notice("server session %d quit: %s => %s.",
sess.LocalPort(), conn.RemoteAddr(), conn.LocalAddr())
}
func handleConnection(i int, conn net.Conn, eclChan chan map[int]*echoClient, msgChan chan<- string) {
fmt.Printf("Client %d: %v <-> %v\n", i, conn.LocalAddr(), conn.RemoteAddr())
ptrEchoClient := &echoClient{
conn: conn,
ch: make(chan string, 100),
}
clients := <-eclChan
clients[i] = ptrEchoClient
eclChan <- clients
go echo(ptrEchoClient)
defer ptrEchoClient.conn.Close()
rb := bufio.NewReader(conn)
for {
msg, e := rb.ReadString('\n')
if e != nil {
break
}
msgChan <- msg
}
clients = <-eclChan
delete(clients, i)
eclChan <- clients
fmt.Printf("%d: closed\n", i)
}
func handleRequest(conn net.Conn) {
fmt.Println("served at port", conn.LocalAddr())
handlers := getHandlers()
for _, handler := range handlers {
handler.Do(conn)
}
}
func dialNNTP(timeout time.Duration) (*nntp.Conn, error) {
dialstr := config.GetAddressStr()
var err error
var c net.Conn
for {
if config.TLS {
tlsconfig := &tls.Config{
InsecureSkipVerify: config.IgnoreCertErrors,
ServerName: config.Address,
}
d := &net.Dialer{Timeout: timeout}
c, err = tls.DialWithDialer(d, "tcp", dialstr, tlsconfig)
} else {
c, err = net.DialTimeout("tcp", dialstr, timeout)
}
if err != nil {
// if it's a timeout, ignore and try again
e, ok := err.(net.Error)
if ok && e.Temporary() {
continue
}
return nil, err
}
break
}
return nntp.Connect(c, fmt.Sprintf("%s:%s", dialstr, c.LocalAddr()),
config.Username, config.Password)
}
func handleConn(c net.Conn) {
fmt.Println("Got connection: ", c.LocalAddr(), "remote ", c.RemoteAddr())
defer c.Close()
buf := make([]byte, 1024)
for {
// read from the connection
n, err := c.Read(buf)
checkIgnore(err)
if n <= 0 {
fmt.Println("connection break...")
return
}
if n > 0 {
//should be a file name
f, err := os.Open(string(buf[:n]))
checkIgnore(err)
if f != nil {
//send this file to the client
sendFile(f, c)
return
} else {
c.Write([]byte("error"))
fmt.Println("Open file error ", err)
return
}
}
}
}
func (this *TcpServer) doConnect(conn net.Conn) {
log.I_NET(conn.RemoteAddr(), " connect to server success")
if this.manager != nil {
this.manager.Connected(conn)
}
data := make([]byte, 2048)
defer conn.Close()
for {
len, err := conn.Read(data)
if err == nil {
read_data := make([]byte, len)
copy(read_data, data)
log.D_NET(conn.LocalAddr(), "read from client", conn.RemoteAddr(), "data :", read_data)
if this.manager != nil {
this.manager.ReadData(conn, read_data)
}
} else {
log.E_NET("read from client", conn.RemoteAddr(), "error, reason :", err)
break
}
}
log.I_NET("client ", conn.RemoteAddr(), " close")
if this.manager != nil {
this.manager.Disconnected(conn)
}
}
func (s *Server) handleTCPConn(conn net.Conn) error {
ident, ok := s.virtualAddrs.getIdent(conn)
if !ok {
return fmt.Errorf("no virtual address available for %s", conn.LocalAddr())
}
_, port, err := parseHostPort(conn.LocalAddr().String())
if err != nil {
return err
}
stream, err := s.dial(ident, tcpTransport, port)
if err != nil {
return err
}
var wg sync.WaitGroup
wg.Add(2)
go s.proxy(&wg, conn, stream)
go s.proxy(&wg, stream, conn)
wg.Wait()
return nonil(stream.Close(), conn.Close())
}
func handleConn(conn net.Conn, counter *int64) {
for {
recordSets, err := fluent.DecodeEntries(conn)
if err == io.EOF {
conn.Close()
return
} else if err != nil {
log.Println("decode entries failed", err, conn.LocalAddr())
conn.Close()
return
}
n := 0
for _, recordSet := range recordSets {
n += len(recordSet.Records)
if !DEBUG {
continue
}
for _, record := range recordSet.Records {
if DEBUG {
fmt.Println(record)
}
}
}
atomic.AddInt64(counter, int64(n))
}
}
// Common example disconnect logic
func CommonDisconnect(n net.Conn, conn *stompngo.Connection,
exampid, tag string,
l *log.Logger) error {
// Disconnect from the Stomp server
e := conn.Disconnect(stompngo.Headers{})
if e != nil {
return e
}
l.Printf("%stag:%s consess:%v common_disconnect_complete local_addr:%s remote_addr:%s\n",
exampid, tag, conn.Session(),
n.LocalAddr().String(), n.RemoteAddr().String())
// Close the network connection
e = n.Close()
if e != nil {
return e
}
// Parting messages
l.Printf("%stag:%s consess:%v common_disconnect_network_close_complete\n",
exampid, tag, conn.Session())
l.Printf("%stag:%s consess:%v common_disconnect_ends\n",
exampid, tag, conn.Session())
//
return nil
}
func newRCConn(c net.Conn, iface *Interface) (*RCConn, error) {
// Leave enough room in the completion queue for any operation,
// including inline sends, to return an error. CQ overruns
// sometimes cause internal errors in the HCA, which can make the
// kernel very unhappy.
qp, err := iface.NewQueuePair(10)
if err != nil {
return nil, err
}
if err := c.SetDeadline(ioDeadline()); err != nil {
checkClose(qp)
return nil, err
}
destLid, destQpn, destPsn, err := writeReadQPParams(c, iface.Lid(), qp.Qpn(), qp.Psn())
if err != nil {
checkClose(qp)
return nil, err
}
messages, meta := CreateBuffers()
if err := qp.Setup(destLid, destQpn, destPsn, messages); err != nil {
checkClose(qp)
return nil, err
}
laddr, raddr := c.LocalAddr(), c.RemoteAddr()
rcc := &RCConn{iface, laddr, raddr, qp, math.MaxInt64, true, messages, meta, false}
return rcc, nil
}
func sendServerUnavailable(conn net.Conn) {
log.Printf("[serv] server unavailable %s %s", conn.LocalAddr(), conn.RemoteAddr())
connAck := &mqtt.ConnAck{
ReturnCode: mqtt.RetCodeServerUnavailable,
}
connAck.Encode(conn)
}
// Determine if `conn` has been transparently redirected to us. If so, fix `req`
// to reflect the intended destination
func fixTransparentReq(conn net.Conn, req *http.Request) {
target := GetOriginalAddr(conn)
is_tls := false
if tlsConn, ok := conn.(*tls.Conn); ok {
is_tls = true
f, err := tlsConn.GetFdCopy()
if err != nil {
panic(err)
}
defer f.Close()
target = GetAddrFromFile(f)
}
is_transparent := target.String() != conn.LocalAddr().String()
if is_transparent {
// It's a transparent proxy
req.URL.Host = req.Host
// TODO(pwaller): Port numbers?
if is_tls {
req.URL.Scheme = "https"
req.URL.Host += ":443"
} else {
req.URL.Scheme = "http"
}
}
}
func sendBadUsernameOrPassword(conn net.Conn) {
log.Printf("[serv] bad username / password %s %s", conn.LocalAddr(), conn.RemoteAddr())
connAck := &mqtt.ConnAck{
ReturnCode: mqtt.RetCodeBadUsernameOrPassword,
}
connAck.Encode(conn)
}
// ServeConn takes an inbound conn and proxies it to a backend.
func (p *ReverseProxy) ServeConn(ctx context.Context, dconn net.Conn) {
transport := p.transport
if transport == nil {
panic("router: nil transport for proxy")
}
defer dconn.Close()
clientGone := dconn.(http.CloseNotifier).CloseNotify()
ctx, cancel := context.WithCancel(ctx)
defer cancel() // finish cancellation goroutine
go func() {
select {
case <-clientGone:
cancel() // client went away, cancel request
case <-ctx.Done():
}
}()
l := p.Logger.New("client_addr", dconn.RemoteAddr(), "host_addr", dconn.LocalAddr(), "proxy", "tcp")
uconn, err := transport.Connect(ctx, l)
if err != nil {
return
}
defer uconn.Close()
joinConns(uconn, dconn)
}
func (e *Endpoint) serveConn(conn net.Conn, wg *sync.WaitGroup) {
defer conn.Close()
defer wg.Done()
var err error
reader := bufio.NewReader(conn)
_, err = proxyProtocol.ConsumeProxyLine(reader)
if err != nil {
return
}
first, err := reader.Peek(1)
for err == nil && (first[0] == ' ' || first[0] == '\t' || first[0] == '\n' || first[0] == '\r') {
reader.ReadByte()
first, err = reader.Peek(1)
}
if err != nil {
return
}
if first[0] == '{' || first[0] == '[' {
// writing shouldn't be buffered
e.config.Hub.serveConn(newReadWriter(reader, conn), ConnContext{LocalAddr: conn.LocalAddr(), RemoteAddr: conn.RemoteAddr()})
} else {
logger.Printf("Got: %s; not a valid json, will pass to HTTP handler.\n", first)
handleUpgrade(newReadWriter(reader, conn), e.config.UpgradingFileServerAddr)
}
}
func handleForwardConn(conn net.Conn) {
defer conn.Close()
for {
recordSets, err := fluent.DecodeEntries(conn)
if err == io.EOF {
return
} else if err != nil {
log.Println("decode entries failed", err, conn.LocalAddr())
return
}
for _, recordSet := range recordSets {
atomic.AddInt64(&Counter, int64(len(recordSet.Records)))
if DumpCh != nil {
select {
case DumpCh <- recordSet:
default:
log.Printf("[warn] %d records dropped for dump file. tag: %s", len(recordSet.Records), recordSet.Tag)
}
}
for tag, channels := range MessageCh {
if !matchTag(tag, recordSet.Tag) {
continue
}
for _, ch := range channels {
select {
case ch <- recordSet:
default:
log.Printf("[warn] %d records dropped for http client.", len(recordSet.Records))
}
}
}
}
}
}
func (f *InForward) handleConn(conn net.Conn) {
defer func() {
f.monitorCh <- &ReceiverStat{
Connections: -1,
}
}()
for {
recordSets, err := fluent.DecodeEntries(conn)
if err == io.EOF {
conn.Close()
return
} else if err != nil {
log.Println("[error] Decode entries failed", err, conn.LocalAddr())
conn.Close()
return
}
m := int64(0)
d := int64(0)
for _, recordSet := range recordSets {
rs := &recordSet
d += f.messageQueue.Enqueue(rs)
m += int64(len(rs.Records))
}
f.monitorCh <- &ReceiverStat{
Messages: m,
Disposed: d,
Buffered: int64(f.messageQueue.Len()),
}
}
}
func Wrap(conn net.Conn, context *Context) *Connection {
reader := bufio.NewReader(conn)
writer := bufio.NewWriter(conn)
res := &Connection{reader, writer, conn, conn.LocalAddr().String(), conn.RemoteAddr().String(), context, 0}
context.activeConnections[conn.LocalAddr().String()] = res
return res
}
func (srv *Server) handlerConn(conn net.Conn) {
defer func() {
if err := recover(); err != nil {
log.Printf("work failed:", err)
}
}()
// 是这里调用关闭还是 Handler() 负责？
defer conn.Close()
if tcpConn, ok := conn.(SetLingerer); ok == true {
// 设置关闭连接时最多等待多少秒
tcpConn.SetLinger(5)
}
conn.SetDeadline(time.Now().Add(handlerNewTimeout))
h, _, err := srv.hNewer.New(conn)
if h == nil {
log.Printf("无法识别请求的协议类型，远端地址：%v，近端地址：%v，详细错误：%v", conn.RemoteAddr(), conn.LocalAddr(), err)
return
}
conn.SetDeadline(time.Now().Add(handlerBaseTimeout))
if err := h.Handle(); err != nil {
if err != io.EOF {
log.Printf("协议处理错误：", err)
}
}
}
func (wp *workerPool) workerFunc(ch *workerChan) {
defer func() {
if r := recover(); r != nil {
wp.Logger.Printf("panic: %s\nStack trace:\n%s", r, debug.Stack())
}
}()
var c net.Conn
var err error
for c = range ch.ch {
if c == nil {
break
}
if err = wp.WorkerFunc(c); err != nil && err != errHijacked {
errStr := err.Error()
if !strings.Contains(errStr, "broken pipe") && !strings.Contains(errStr, "reset by peer") {
wp.Logger.Printf("error when serving connection %q<->%q: %s", c.LocalAddr(), c.RemoteAddr(), err)
}
}
if err != errHijacked {
c.Close()
}
c = nil
if !wp.release(ch) {
break
}
}
}
// Sends a file across the network to a peer.
// @param string fileName - The name of the file to send to the peer. It will have path from root
// of Lynx Directory.
// @param net.Conn conn - The socket over which we will send the file
// @return error - An error can be produced when trying open a file or write over
// the network - otherwise error will be nil.
func sendFile(fileName string, conn net.Conn) error {
//fmt.Println(fileName)
// Can use read when implementing chunking
fBytes, err := ioutil.ReadFile(lynxutil.HomePath + fileName)
// Begin Compression
var b bytes.Buffer
gz := gzip.NewWriter(&b)
gz.Write(fBytes)
gz.Close()
// End Compression
// Begin Encryption
var cipherFile []byte
// The key length can be 32, 24, 16 bytes (OR in bits: 128, 192 or 256)
//key := []byte("abcdefghijklmnopqrstuvwxyz123456")
publicKey := lynxutil.Peer{IP: conn.LocalAddr().String()}.Key + lynxutil.PrivateKey
key := []byte(publicKey)
if cipherFile, err = mycrypt.Encrypt(key, b.Bytes()); err != nil {
return err
}
// End Encryption
n, err := conn.Write(cipherFile)
if err != nil {
return err
}
fmt.Println(n, "Bytes were sent")
return nil // No Errors Occured If We Reached Here
}
// connect makes a connection to the syslog server.
// It must be called with w.mu held.
func (w *Writer) connect() (err error) {
if w.conn != nil {
// ignore err from close, it makes sense to continue anyway
w.conn.close()
w.conn = nil
}
if w.network == "" {
w.conn, err = localSyslog()
if err != nil {
return err
}
if w.hostname == "" {
w.hostname = "localhost"
}
} else {
var c net.Conn
c, err = dial(w.network, w.raddr, w.tlsCfg)
if err == nil {
w.conn = &netConn{conn: c}
if w.hostname == "" {
w.hostname = c.LocalAddr().String()
}
}
}
return
}
func (this *BaseTcpOperation) OpRawData(conn net.Conn, data []byte) (result bool, id int, version byte, serverType byte, dataType byte, dataLen int, rawData []byte) {
this.copyBuf(data)
for true {
exist, id, version, serverType, dataType, oLen, rawData := protocol.ParseRawProtocol(this.buf, this.buf_len)
if exist {
if protocol.IsPingByType(dataType) {
log.I_NET(conn.LocalAddr(), "write to client", conn.RemoteAddr(), "pong")
conn.Write(protocol.NewPongProtocol(id))
this.FinishOneProtocol()
} else if protocol.IsPongByType(dataType) {
log.I_NET("client", conn.LocalAddr(), "read from server", conn.RemoteAddr(), " pong")
this.FinishOneProtocol()
} else {
d := make([]byte, oLen)
copy(d, rawData)
this.FinishOneProtocol()
return true, id, version, serverType, dataType, oLen, d
}
} else {
return false, 0, 0, 0, 0, 0, nil
}
}
return false, 0, 0, 0, 0, 0, nil
}
func handleSocks5(conn net.Conn, methods []uint8) {
if err := selectMethod(conn, methods...); err != nil {
log.Println(err)
return
}
req, err := gosocks5.ReadRequest(conn)
if err != nil {
return
}
//log.Println(req)
sconn, err := makeTunnel()
if err != nil {
gosocks5.NewReply(gosocks5.Failure, nil).Write(conn)
log.Println(err)
return
}
defer sconn.Close()
switch req.Cmd {
case gosocks5.CmdConnect, gosocks5.CmdBind:
if err := req.Write(sconn); err != nil {
return
}
Transport(conn, sconn)
case gosocks5.CmdUdp:
if err := req.Write(sconn); err != nil {
return
}
rep, err := gosocks5.ReadReply(sconn)
if err != nil || rep.Rep != gosocks5.Succeeded {
return
}
uconn, err := net.ListenUDP("udp", nil)
if err != nil {
log.Println(err)
gosocks5.NewReply(gosocks5.Failure, nil).Write(conn)
return
}
defer uconn.Close()
addr := ToSocksAddr(uconn.LocalAddr())
addr.Host, _, _ = net.SplitHostPort(conn.LocalAddr().String())
log.Println("udp:", addr)
rep = gosocks5.NewReply(gosocks5.Succeeded, addr)
if err := rep.Write(conn); err != nil {
log.Println(err)
return
}
go cliTunnelUDP(uconn, sconn)
// block, waiting for client exit
ioutil.ReadAll(conn)
}
}
// sshConnection generates the SSH_CONNECTION environment variable.
//
// This is untested on UNIX sockets.
func sshConnection(conn net.Conn) string {
remote := conn.RemoteAddr().String()
local := conn.LocalAddr().String()
rhost, rport, _ := net.SplitHostPort(remote)
lhost, lport, _ := net.SplitHostPort(local)
return fmt.Sprintf("%s %s %s %s", rhost, rport, lhost, lport)
}
func (s *Server) newSession(conn net.Conn) *session {
return &session{
srv: s,
conn: textproto.NewConn(conn),
raddr: conn.RemoteAddr(),
laddr: conn.LocalAddr(),
}
}
func serverConnBaseContext(c net.Conn, opts *ServeConnOpts) (ctx contextContext, cancel func()) {
ctx, cancel = context.WithCancel(context.Background())
ctx = context.WithValue(ctx, http.LocalAddrContextKey, c.LocalAddr())
if hs := opts.baseConfig(); hs != nil {
ctx = context.WithValue(ctx, http.ServerContextKey, hs)
}
return
}