Apply Tailscale bind send headroom
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parent
45cd03b8a1
commit
749db0015c
7 changed files with 50 additions and 32 deletions
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@ -334,7 +334,7 @@ func (e ErrUDPGSODisabled) Unwrap() error {
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return e.RetryErr
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}
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func (s *StdNetBind) Send(bufs [][]byte, endpoint Endpoint) error {
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func (s *StdNetBind) Send(bufs [][]byte, endpoint Endpoint, offset int) error {
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s.mu.Lock()
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blackhole := s.blackhole4
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conn := s.ipv4
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@ -377,7 +377,7 @@ func (s *StdNetBind) Send(bufs [][]byte, endpoint Endpoint) error {
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)
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retry:
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if offload {
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n := coalesceMessages(ua, endpoint.(*StdNetEndpoint), bufs, *msgs, setGSOSize)
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n := coalesceMessages(ua, endpoint.(*StdNetEndpoint), bufs, offset, *msgs, setGSOSize)
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err = s.send(conn, br, (*msgs)[:n])
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if err != nil && offload && errShouldDisableUDPGSO(err) {
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offload = false
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@ -394,7 +394,7 @@ retry:
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} else {
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for i := range bufs {
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(*msgs)[i].Addr = ua
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(*msgs)[i].Buffers[0] = bufs[i]
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(*msgs)[i].Buffers[0] = bufs[i][offset:]
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setSrcControl(&(*msgs)[i].OOB, endpoint.(*StdNetEndpoint))
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}
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err = s.send(conn, br, (*msgs)[:len(bufs)])
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@ -443,7 +443,7 @@ const (
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type setGSOFunc func(control *[]byte, gsoSize uint16)
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func coalesceMessages(addr *net.UDPAddr, ep *StdNetEndpoint, bufs [][]byte, msgs []ipv6.Message, setGSO setGSOFunc) int {
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func coalesceMessages(addr *net.UDPAddr, ep *StdNetEndpoint, bufs [][]byte, offset int, msgs []ipv6.Message, setGSO setGSOFunc) int {
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var (
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base = -1 // index of msg we are currently coalescing into
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gsoSize int // segmentation size of msgs[base]
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@ -455,6 +455,7 @@ func coalesceMessages(addr *net.UDPAddr, ep *StdNetEndpoint, bufs [][]byte, msgs
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maxPayloadLen = maxIPv6PayloadLen
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}
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for i, buf := range bufs {
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buf = buf[offset:]
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if i > 0 {
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msgLen := len(buf)
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baseLenBefore := len(msgs[base].Buffers[0])
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