/
server_tcp_v1.go
258 lines (250 loc) · 6.36 KB
/
server_tcp_v1.go
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package server
import (
"io"
"net"
"time"
"go-common/app/service/main/broadcast/libs/bufio"
"go-common/app/service/main/broadcast/libs/bytes"
itime "go-common/app/service/main/broadcast/libs/time"
"go-common/app/service/main/broadcast/model"
"go-common/library/log"
)
// InitTCPV1 listen all tcp.bind and start accept connections.
func InitTCPV1(server *Server, addrs []string, accept int) (err error) {
var (
bind string
listener *net.TCPListener
addr *net.TCPAddr
)
for _, bind = range addrs {
if addr, err = net.ResolveTCPAddr("tcp", bind); err != nil {
log.Error("net.ResolveTCPAddr(\"tcp\", \"%s\") error(%v)", bind, err)
return
}
if listener, err = net.ListenTCP("tcp", addr); err != nil {
log.Error("net.ListenTCP(\"tcp\", \"%s\") error(%v)", bind, err)
return
}
log.Info("start tcp listen: \"%s\"", bind)
// split N core accept
for i := 0; i < accept; i++ {
go acceptTCPV1(server, listener)
}
}
return
}
// Accept accepts connections on the listener and serves requests
// for each incoming connection. Accept blocks; the caller typically
// invokes it in a go statement.
func acceptTCPV1(server *Server, lis *net.TCPListener) {
var (
conn *net.TCPConn
err error
r int
)
for {
if conn, err = lis.AcceptTCP(); err != nil {
// if listener close then return
log.Error("listener.Accept(\"%s\") error(%v)", lis.Addr().String(), err)
time.Sleep(time.Second)
continue
}
if err = conn.SetKeepAlive(server.c.TCP.Keepalive); err != nil {
log.Error("conn.SetKeepAlive() error(%v)", err)
return
}
if err = conn.SetReadBuffer(server.c.TCP.Rcvbuf); err != nil {
log.Error("conn.SetReadBuffer() error(%v)", err)
return
}
if err = conn.SetWriteBuffer(server.c.TCP.Sndbuf); err != nil {
log.Error("conn.SetWriteBuffer() error(%v)", err)
return
}
go serveTCPV1(server, conn, r)
if r++; r == _maxInt {
r = 0
}
}
}
func serveTCPV1(s *Server, conn *net.TCPConn, r int) {
var (
// timer
tr = s.round.Timer(r)
rp = s.round.Reader(r)
wp = s.round.Writer(r)
// ip addr
lAddr = conn.LocalAddr().String()
rAddr = conn.RemoteAddr().String()
)
if s.c.Broadcast.Debug {
log.Info("start tcp serve \"%s\" with \"%s\"", lAddr, rAddr)
}
s.serveTCPV1(conn, rp, wp, tr)
}
// TODO linger close?
func (s *Server) serveTCPV1(conn *net.TCPConn, rp, wp *bytes.Pool, tr *itime.Timer) {
var (
err error
roomID string
hb time.Duration // heartbeat
p *model.Proto
b *Bucket
trd *itime.TimerData
rpt *Report
rb = rp.Get()
wb = wp.Get()
ch = NewChannel(s.c.ProtoSection.CliProto, s.c.ProtoSection.SvrProto)
rr = &ch.Reader
wr = &ch.Writer
)
ch.Reader.ResetBuffer(conn, rb.Bytes())
ch.Writer.ResetBuffer(conn, wb.Bytes())
// handshake
trd = tr.Add(time.Duration(s.c.ProtoSection.HandshakeTimeout), func() {
conn.Close()
})
ch.V1 = true
ch.IP, _, _ = net.SplitHostPort(conn.RemoteAddr().String())
// must not setadv, only used in auth
if p, err = ch.CliProto.Set(); err == nil {
if ch.Key, roomID, ch.Mid, hb, rpt, err = s.authTCPV1(rr, wr, p, ch.IP); err == nil {
b = s.Bucket(ch.Key)
err = b.Put(roomID, ch)
}
}
if err != nil {
if err != io.EOF {
log.Error("key: %s ip: %s handshake failed error(%v)", ch.Key, conn.RemoteAddr().String(), err)
}
conn.Close()
rp.Put(rb)
wp.Put(wb)
tr.Del(trd)
return
}
trd.Key = ch.Key
tr.Set(trd, hb)
var online int32
if ch.Room != nil {
online = ch.Room.OnlineNum()
}
report(actionConnect, rpt, online)
// hanshake ok start dispatch goroutine
go s.dispatchTCPV1(ch.Key, conn, wr, wp, wb, ch)
for {
if p, err = ch.CliProto.Set(); err != nil {
break
}
if err = p.ReadTCPV1(rr); err != nil {
break
}
if p.Operation == model.OpHeartbeat {
tr.Set(trd, hb)
p.Body = nil
p.Operation = model.OpHeartbeatReply
} else {
if err = s.Operate(p, ch, b); err != nil {
break
}
}
ch.CliProto.SetAdv()
ch.Signal()
}
if err != nil && err != io.EOF {
log.Error("key: %s server tcp failed error(%v)", ch.Key, err)
}
b.Del(ch)
tr.Del(trd)
rp.Put(rb)
conn.Close()
ch.Close()
//if err = s.Disconnect(context.Background(), ch.Mid, roomID); err != nil {
// log.Error("key: %s operator do disconnect error(%v)", ch.Key, err)
//}
if ch.Room != nil {
online = ch.Room.OnlineNum()
}
report(actionDisconnect, rpt, online)
}
// dispatch accepts connections on the listener and serves requests
// for each incoming connection. dispatch blocks; the caller typically
// invokes it in a go statement.
func (s *Server) dispatchTCPV1(key string, conn *net.TCPConn, wr *bufio.Writer, wp *bytes.Pool, wb *bytes.Buffer, ch *Channel) {
var (
err error
finish bool
online int32
)
for {
var p = ch.Ready()
switch p {
case model.ProtoFinish:
finish = true
goto failed
case model.ProtoReady:
// fetch message from svrbox(client send)
for {
if p, err = ch.CliProto.Get(); err != nil {
err = nil // must be empty error
break
}
if p.Operation == model.OpHeartbeatReply {
if ch.Room != nil {
online = ch.Room.OnlineNum()
}
if err = p.WriteTCPHeartV1(wr, online); err != nil {
goto failed
}
} else {
if err = p.WriteTCPV1(wr); err != nil {
goto failed
}
}
p.Body = nil // avoid memory leak
ch.CliProto.GetAdv()
}
default:
// server send
if err = p.WriteTCPV1(wr); err != nil {
goto failed
}
}
// only hungry flush response
if err = wr.Flush(); err != nil {
break
}
}
failed:
if err != nil {
log.Error("key: %s dispatch tcp error(%v)", key, err)
}
conn.Close()
wp.Put(wb)
// must ensure all channel message discard, for reader won't blocking Signal
for !finish {
finish = (ch.Ready() == model.ProtoFinish)
}
}
// auth for goim handshake with client, use rsa & aes.
func (s *Server) authTCPV1(rr *bufio.Reader, wr *bufio.Writer, p *model.Proto, ip string) (key, roomID string, userID int64, heartbeat time.Duration, rpt *Report, err error) {
if err = p.ReadTCPV1(rr); err != nil {
return
}
if p.Operation != model.OpAuth {
log.Warn("auth operation not valid: %d", p.Operation)
err = ErrOperation
return
}
if userID, roomID, key, rpt, err = s.NoAuth(int16(p.Ver), p.Body, ip); err != nil {
return
}
heartbeat = _clientHeartbeat
p.Body = nil
p.Operation = model.OpAuthReply
if err = p.WriteTCPV1(wr); err != nil {
return
}
err = wr.Flush()
return
}