mirror of https://gogs.blitter.com/RLabs/xs
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
// +build linux
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package kcp
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import (
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"net"
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"os"
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"sync/atomic"
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"github.com/pkg/errors"
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"golang.org/x/net/ipv4"
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)
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func (s *UDPSession) tx(txqueue []ipv4.Message) {
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// default version
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if s.xconn == nil || s.xconnWriteError != nil {
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s.defaultTx(txqueue)
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return
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}
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// x/net version
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nbytes := 0
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npkts := 0
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for len(txqueue) > 0 {
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if n, err := s.xconn.WriteBatch(txqueue, 0); err == nil {
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for k := range txqueue[:n] {
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nbytes += len(txqueue[k].Buffers[0])
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}
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npkts += n
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txqueue = txqueue[n:]
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} else {
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// compatibility issue:
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// for linux kernel<=2.6.32, support for sendmmsg is not available
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// an error of type os.SyscallError will be returned
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if operr, ok := err.(*net.OpError); ok {
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if se, ok := operr.Err.(*os.SyscallError); ok {
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if se.Syscall == "sendmmsg" {
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s.xconnWriteError = se
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s.defaultTx(txqueue)
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return
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}
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}
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}
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s.notifyWriteError(errors.WithStack(err))
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break
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}
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}
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atomic.AddUint64(&DefaultSnmp.OutPkts, uint64(npkts))
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atomic.AddUint64(&DefaultSnmp.OutBytes, uint64(nbytes))
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}
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