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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package windows
import (
"sync"
"syscall"
_ "unsafe"
)
//go:linkname WSASendtoInet4 syscall.wsaSendtoInet4
//go:noescape
func WSASendtoInet4(s syscall.Handle, bufs *syscall.WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *syscall.SockaddrInet4, overlapped *syscall.Overlapped, croutine *byte) (err error)
//go:linkname WSASendtoInet6 syscall.wsaSendtoInet6
//go:noescape
func WSASendtoInet6(s syscall.Handle, bufs *syscall.WSABuf, bufcnt uint32, sent *uint32, flags uint32, to *syscall.SockaddrInet6, overlapped *syscall.Overlapped, croutine *byte) (err error)
const (
SIO_TCP_INITIAL_RTO = syscall.IOC_IN | syscall.IOC_VENDOR | 17
TCP_INITIAL_RTO_UNSPECIFIED_RTT = ^uint16(0)
TCP_INITIAL_RTO_NO_SYN_RETRANSMISSIONS = ^uint8(1)
)
type TCP_INITIAL_RTO_PARAMETERS struct {
Rtt uint16
MaxSynRetransmissions uint8
}
var Support_TCP_INITIAL_RTO_NO_SYN_RETRANSMISSIONS = sync.OnceValue(func() bool {
var maj, min, build uint32
rtlGetNtVersionNumbers(&maj, &min, &build)
return maj >= 10 && build&0xffff >= 16299
})
//go:linkname rtlGetNtVersionNumbers syscall.rtlGetNtVersionNumbers
//go:noescape
func rtlGetNtVersionNumbers(majorVersion *uint32, minorVersion *uint32, buildNumber *uint32)
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