118 lines
2.0 KiB
Go
118 lines
2.0 KiB
Go
package main
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import (
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"net"
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"time"
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)
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type udpWrite struct {
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addr *net.UDPAddr
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buf []byte
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}
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type serverUdpListener struct {
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p *program
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nconn *net.UDPConn
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trackFlowType trackFlowType
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readBuf1 []byte
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readBuf2 []byte
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readCurBuf bool
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writeBuf1 []byte
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writeBuf2 []byte
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writeCurBuf bool
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writec chan *udpWrite
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done chan struct{}
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}
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func newServerUdpListener(p *program, port int, trackFlowType trackFlowType) (*serverUdpListener, error) {
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nconn, err := net.ListenUDP("udp", &net.UDPAddr{
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Port: port,
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})
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if err != nil {
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return nil, err
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}
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l := &serverUdpListener{
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p: p,
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nconn: nconn,
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trackFlowType: trackFlowType,
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readBuf1: make([]byte, 2048),
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readBuf2: make([]byte, 2048),
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writeBuf1: make([]byte, 2048),
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writeBuf2: make([]byte, 2048),
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writec: make(chan *udpWrite),
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done: make(chan struct{}),
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}
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l.log("opened on :%d", port)
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return l, nil
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}
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func (l *serverUdpListener) log(format string, args ...interface{}) {
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var label string
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if l.trackFlowType == _TRACK_FLOW_RTP {
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label = "RTP"
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} else {
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label = "RTCP"
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}
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l.p.log("[UDP/"+label+" listener] "+format, args...)
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}
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func (l *serverUdpListener) run() {
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go func() {
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for w := range l.writec {
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l.nconn.SetWriteDeadline(time.Now().Add(l.p.conf.WriteTimeout))
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l.nconn.WriteTo(w.buf, w.addr)
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}
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}()
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for {
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var buf []byte
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if !l.readCurBuf {
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buf = l.readBuf1
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} else {
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buf = l.readBuf2
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}
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l.readCurBuf = !l.readCurBuf
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n, addr, err := l.nconn.ReadFromUDP(buf)
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if err != nil {
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break
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}
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l.p.events <- programEventClientFrameUdp{
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l.trackFlowType,
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addr,
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buf[:n],
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}
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}
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close(l.writec)
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close(l.done)
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}
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func (l *serverUdpListener) close() {
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l.nconn.Close()
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<-l.done
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}
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func (l *serverUdpListener) write(addr *net.UDPAddr, inbuf []byte) {
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var buf []byte
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if !l.writeCurBuf {
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buf = l.writeBuf1
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} else {
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buf = l.writeBuf2
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}
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buf = buf[:len(inbuf)]
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copy(buf, inbuf)
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l.writeCurBuf = !l.writeCurBuf
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l.writec <- &udpWrite{
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addr: addr,
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buf: buf,
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}
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}
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