67 lines
1.0 KiB
Go
67 lines
1.0 KiB
Go
|
// Copyright 2016 Mikio Hara. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package tcpopt
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/binary"
|
||
|
|
"time"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
var nativeEndian binary.ByteOrder
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
i := uint32(1)
|
||
|
|
b := (*[4]byte)(unsafe.Pointer(&i))
|
||
|
|
if b[0] == 1 {
|
||
|
|
nativeEndian = binary.LittleEndian
|
||
|
|
} else {
|
||
|
|
nativeEndian = binary.BigEndian
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func boolint32(b bool) int32 {
|
||
|
|
if b {
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
|
||
|
|
func uint32bool(n uint32) bool {
|
||
|
|
if n != 0 {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
ianaProtocolIP = 0x0
|
||
|
|
ianaProtocolTCP = 0x6
|
||
|
|
ianaProtocolIPv6 = 0x29
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
soNodelay = iota
|
||
|
|
soSndbuf
|
||
|
|
soRcvbuf
|
||
|
|
soKeepalive
|
||
|
|
soKeepidle
|
||
|
|
soKeepintvl
|
||
|
|
soKeepcnt
|
||
|
|
soCork
|
||
|
|
soNotsentLOWAT
|
||
|
|
soError
|
||
|
|
soECN
|
||
|
|
soMaxseg
|
||
|
|
soMax
|
||
|
|
)
|
||
|
|
|
||
|
|
// An option represents a binding for socket option.
|
||
|
|
type option struct {
|
||
|
|
level int // option level
|
||
|
|
name int // option name, must be equal or greater than 1
|
||
|
|
uot time.Duration // unit of time
|
||
|
|
}
|