45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
// Copyright 2017 Mikio Hara. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tcp
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import (
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"syscall"
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"unsafe"
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)
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const (
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sysSIOCINQ = 0x541b
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sysSIOCOUTQ = 0x5411
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)
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func ioctl(s uintptr, ioc int, b []byte) error {
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if _, _, errno := syscall.Syscall(syscall.SYS_IOCTL, s, uintptr(ioc), uintptr(unsafe.Pointer(&b[0]))); errno != 0 {
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return error(errno)
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}
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return nil
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}
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const (
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sysSETSOCKOPT = 0xe
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sysGETSOCKOPT = 0xf
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)
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func socketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
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func setsockopt(s uintptr, level, name int, b []byte) error {
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if _, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0); errno != 0 {
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return error(errno)
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}
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return nil
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}
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func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
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l := uint32(len(b))
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if _, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0); errno != 0 {
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return int(l), error(errno)
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}
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return int(l), nil
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}
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