/
netgo_send.go
66 lines (53 loc) · 1.33 KB
/
netgo_send.go
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// +build linux
// Copyright (C) 2018 Kun Zhong All rights reserved.
// Use of this source code is governed by a MIT-style license that can be found
// in the LICENSE file.
package netgo
import(
"syscall"
"bytes"
)
func (nio *netio) Send(naddr int32, buf[]byte) (err error) {
stream := nio.selectStream(naddr)
if stream == nil || !stream.PreSend() {
return ErrInvalidSocketAddr
}
packet := &netPack{
header: netPackHead {
magic: netpackMagic,
bodyLen: uint32(len(buf)),
target: 0,//todo:target
},
body : buf,
naddr: naddr,
}
headbuf := bytes.NewBuffer(packet.binHeader[:0])
if err = encoderHeader(headbuf, &packet.header); err != nil {
return err
}
return stream.SendPacket(naddr, packet)
}
func (nio *netio) rawSend(naddr int32, fd FD, buf[]byte) (totalSend int, err error) {
if fd.fd < 0 {
return -1, ErrInvalidSocketAddr
}
buflen := len(buf)
var lastSend int
for totalSend < buflen {
lastSend, err = syscall.Write(fd.fd, buf[totalSend:])
if lastSend < 0 && err != syscall.EINTR || lastSend == 0{
break
}
totalSend += lastSend
}
if totalSend == buflen {
return
}
if lastSend < 0 && err != syscall.EAGAIN && err != syscall.EWOULDBLOCK {
return -1, err
}
if pollEvent.Mod(fd.fd, int32(fd.fd), naddr, syscall.EPOLLIN|syscall.EPOLLOUT|syscall.EPOLLERR) != nil {
return -1, err
}
return
}