356 lines
9.2 KiB
Go
356 lines
9.2 KiB
Go
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package server
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import (
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"context"
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"io"
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"net"
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"strings"
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"time"
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iModel "go-common/app/interface/main/broadcast/model"
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"go-common/app/service/main/broadcast/libs/bufio"
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"go-common/app/service/main/broadcast/libs/bytes"
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itime "go-common/app/service/main/broadcast/libs/time"
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"go-common/app/service/main/broadcast/model"
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"go-common/library/log"
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"go-common/library/net/metadata"
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)
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// InitTCP listen all tcp.bind and start accept connections.
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func InitTCP(server *Server, addrs []string, accept int) (err error) {
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var (
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bind string
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listener *net.TCPListener
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addr *net.TCPAddr
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)
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for _, bind = range addrs {
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if addr, err = net.ResolveTCPAddr("tcp", bind); err != nil {
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log.Error("net.ResolveTCPAddr(\"tcp\", \"%s\") error(%v)", bind, err)
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return
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}
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if listener, err = net.ListenTCP("tcp", addr); err != nil {
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log.Error("net.ListenTCP(\"tcp\", \"%s\") error(%v)", bind, err)
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return
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}
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log.Info("start tcp listen: \"%s\"", bind)
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// split N core accept
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for i := 0; i < accept; i++ {
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go acceptTCP(server, listener)
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}
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}
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return
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}
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// Accept accepts connections on the listener and serves requests
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// for each incoming connection. Accept blocks; the caller typically
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// invokes it in a go statement.
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func acceptTCP(server *Server, lis *net.TCPListener) {
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var (
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conn *net.TCPConn
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err error
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r int
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)
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for {
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if conn, err = lis.AcceptTCP(); err != nil {
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// if listener close then return
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log.Error("listener.Accept(\"%s\") error(%v)", lis.Addr().String(), err)
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return
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}
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if err = conn.SetKeepAlive(server.c.TCP.Keepalive); err != nil {
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log.Error("conn.SetKeepAlive() error(%v)", err)
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return
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}
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if err = conn.SetReadBuffer(server.c.TCP.Rcvbuf); err != nil {
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log.Error("conn.SetReadBuffer() error(%v)", err)
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return
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}
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if err = conn.SetWriteBuffer(server.c.TCP.Sndbuf); err != nil {
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log.Error("conn.SetWriteBuffer() error(%v)", err)
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return
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}
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go serveTCP(server, conn, r)
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if r++; r == _maxInt {
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r = 0
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}
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}
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}
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func serveTCP(s *Server, conn *net.TCPConn, r int) {
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var (
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// timer
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tr = s.round.Timer(r)
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rp = s.round.Reader(r)
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wp = s.round.Writer(r)
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// ip addr
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lAddr = conn.LocalAddr().String()
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rAddr = conn.RemoteAddr().String()
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)
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if s.c.Broadcast.Debug {
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log.Info("start tcp serve \"%s\" with \"%s\"", lAddr, rAddr)
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}
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s.ServeTCP(conn, rp, wp, tr)
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}
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// ServeTCP .
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func (s *Server) ServeTCP(conn *net.TCPConn, rp, wp *bytes.Pool, tr *itime.Timer) {
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var (
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err error
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rid string
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accepts []int32
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white bool
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p *model.Proto
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b *Bucket
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trd *itime.TimerData
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lastHb = time.Now()
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rb = rp.Get()
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wb = wp.Get()
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ch = NewChannel(s.c.ProtoSection.CliProto, s.c.ProtoSection.SvrProto)
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rr = &ch.Reader
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wr = &ch.Writer
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)
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ch.Reader.ResetBuffer(conn, rb.Bytes())
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ch.Writer.ResetBuffer(conn, wb.Bytes())
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// handshake
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step := 0
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trd = tr.Add(time.Duration(s.c.ProtoSection.HandshakeTimeout), func() {
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conn.Close()
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log.Error("key: %s remoteIP: %s step: %d tcp handshake timeout", ch.Key, conn.RemoteAddr().String(), step)
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})
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ch.IP, _, _ = net.SplitHostPort(conn.RemoteAddr().String())
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// must not setadv, only used in auth
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step = 1
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md := metadata.MD{
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metadata.RemoteIP: ch.IP,
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}
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ctx := metadata.NewContext(context.Background(), md)
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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if p, err = ch.CliProto.Set(); err == nil {
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if ch.Mid, ch.Key, rid, ch.Platform, accepts, err = s.authTCP(ctx, rr, wr, p); err == nil {
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ch.Watch(accepts...)
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b = s.Bucket(ch.Key)
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err = b.Put(rid, ch)
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if s.c.Broadcast.Debug {
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log.Info("tcp connnected key:%s mid:%d proto:%+v", ch.Key, ch.Mid, p)
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}
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}
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}
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step = 2
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if err != nil {
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conn.Close()
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rp.Put(rb)
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wp.Put(wb)
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tr.Del(trd)
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log.Error("key: %s handshake failed error(%v)", ch.Key, err)
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return
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}
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trd.Key = ch.Key
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tr.Set(trd, _clientHeartbeat)
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white = whitelist.Contains(ch.Mid)
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if white {
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whitelist.Printf("key: %s[%s] auth\n", ch.Key, rid)
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}
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step = 3
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reportCh(actionConnect, ch)
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// hanshake ok start dispatch goroutine
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go s.dispatchTCP(conn, wr, wp, wb, ch)
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serverHeartbeat := s.RandServerHearbeat()
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for {
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if p, err = ch.CliProto.Set(); err != nil {
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break
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}
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if white {
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whitelist.Printf("key: %s start read proto\n", ch.Key)
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}
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if err = p.ReadTCP(rr); err != nil {
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break
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}
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if white {
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whitelist.Printf("key: %s read proto:%v\n", ch.Key, p)
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}
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if p.Operation == model.OpHeartbeat {
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tr.Set(trd, _clientHeartbeat)
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p.Body = nil
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p.Operation = model.OpHeartbeatReply
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// last server heartbeat
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if now := time.Now(); now.Sub(lastHb) > serverHeartbeat {
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if err = s.Heartbeat(ctx, ch.Mid, ch.Key); err == nil {
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lastHb = now
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} else {
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err = nil
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}
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}
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if s.c.Broadcast.Debug {
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log.Info("tcp heartbeat receive key:%s, mid:%d", ch.Key, ch.Mid)
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}
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step++
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} else {
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if err = s.Operate(p, ch, b); err != nil {
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break
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}
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}
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if white {
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whitelist.Printf("key: %s process proto:%v\n", ch.Key, p)
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}
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ch.CliProto.SetAdv()
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ch.Signal()
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if white {
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whitelist.Printf("key: %s signal\n", ch.Key)
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}
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}
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if white {
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whitelist.Printf("key: %s server tcp error(%v)\n", ch.Key, err)
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}
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if err != nil && err != io.EOF && !strings.Contains(err.Error(), "closed") {
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log.Error("key: %s server tcp failed error(%v)", ch.Key, err)
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}
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b.Del(ch)
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tr.Del(trd)
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rp.Put(rb)
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conn.Close()
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ch.Close()
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if err = s.Disconnect(ctx, ch.Mid, ch.Key); err != nil {
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log.Error("key: %s operator do disconnect error(%v)", ch.Key, err)
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}
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if white {
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whitelist.Printf("key: %s disconnect error(%v)\n", ch.Key, err)
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}
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reportCh(actionDisconnect, ch)
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if s.c.Broadcast.Debug {
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log.Info("tcp disconnected key: %s mid:%d", ch.Key, ch.Mid)
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}
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}
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// dispatch accepts connections on the listener and serves requests
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// for each incoming connection. dispatch blocks; the caller typically
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// invokes it in a go statement.
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func (s *Server) dispatchTCP(conn *net.TCPConn, wr *bufio.Writer, wp *bytes.Pool, wb *bytes.Buffer, ch *Channel) {
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var (
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err error
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finish bool
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online int32
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white = whitelist.Contains(ch.Mid)
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)
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if s.c.Broadcast.Debug {
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log.Info("key: %s start dispatch tcp goroutine", ch.Key)
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}
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for {
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if white {
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whitelist.Printf("key: %s wait proto ready\n", ch.Key)
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}
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var p = ch.Ready()
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if white {
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whitelist.Printf("key: %s proto ready\n", ch.Key)
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}
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if s.c.Broadcast.Debug {
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log.Info("key:%s dispatch msg:%v", ch.Key, *p)
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}
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switch p {
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case model.ProtoFinish:
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if white {
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whitelist.Printf("key: %s receive proto finish\n", ch.Key)
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}
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if s.c.Broadcast.Debug {
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log.Info("key: %s wakeup exit dispatch goroutine", ch.Key)
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}
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finish = true
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goto failed
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case model.ProtoReady:
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// fetch message from svrbox(client send)
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for {
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if p, err = ch.CliProto.Get(); err != nil {
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err = nil // must be empty error
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break
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}
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if white {
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whitelist.Printf("key: %s start write client proto%v\n", ch.Key, p)
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}
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if p.Operation == model.OpHeartbeatReply {
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if ch.Room != nil {
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online = ch.Room.OnlineNum()
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b := map[string]interface{}{"room": map[string]interface{}{"online": online, "room_id": ch.Room.ID}}
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p.Body = iModel.Message(b, nil)
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}
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if err = p.WriteTCPHeart(wr); err != nil {
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goto failed
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}
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} else {
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if err = p.WriteTCP(wr); err != nil {
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goto failed
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}
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}
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if white {
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whitelist.Printf("key: %s write client proto%v\n", ch.Key, p)
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}
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p.Body = nil // avoid memory leak
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ch.CliProto.GetAdv()
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}
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default:
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if white {
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whitelist.Printf("key: %s start write server proto%v\n", ch.Key, p)
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}
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// server send
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if err = p.WriteTCP(wr); err != nil {
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goto failed
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}
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if white {
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whitelist.Printf("key: %s write server proto%v\n", ch.Key, p)
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}
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if s.c.Broadcast.Debug {
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log.Info("tcp sent a message key:%s mid:%d proto:%+v", ch.Key, ch.Mid, p)
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}
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}
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if white {
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whitelist.Printf("key: %s start flush \n", ch.Key)
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}
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// only hungry flush response
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if err = wr.Flush(); err != nil {
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break
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}
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if white {
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whitelist.Printf("key: %s flush\n", ch.Key)
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}
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}
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failed:
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if white {
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whitelist.Printf("key: %s dispatch tcp error(%v)\n", ch.Key, err)
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}
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if err != nil {
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log.Error("key: %s dispatch tcp error(%v)", ch.Key, err)
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}
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conn.Close()
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wp.Put(wb)
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// must ensure all channel message discard, for reader won't blocking Signal
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for !finish {
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finish = (ch.Ready() == model.ProtoFinish)
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}
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if s.c.Broadcast.Debug {
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log.Info("key: %s dispatch goroutine exit", ch.Key)
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}
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}
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// auth for goim handshake with client, use rsa & aes.
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func (s *Server) authTCP(ctx context.Context, rr *bufio.Reader, wr *bufio.Writer, p *model.Proto) (mid int64, key string, rid string, platform string, accepts []int32, err error) {
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if err = p.ReadTCP(rr); err != nil {
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log.Error("authTCP.ReadTCP(key:%v).err(%v)", key, err)
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return
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}
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if p.Operation != model.OpAuth {
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log.Warn("auth operation not valid: %d", p.Operation)
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err = ErrOperation
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return
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}
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if mid, key, rid, platform, accepts, err = s.Connect(ctx, p, ""); err != nil {
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log.Error("authTCP.Connect(key:%v).err(%v)", key, err)
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return
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}
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p.Body = []byte(`{"code":0,"message":"ok"}`)
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p.Operation = model.OpAuthReply
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if err = p.WriteTCP(wr); err != nil {
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log.Error("authTCP.WriteTCP(key:%v).err(%v)", key, err)
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return
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}
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err = wr.Flush()
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return
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}
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