50 lines
1.4 KiB
Go
50 lines
1.4 KiB
Go
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// Copyright 2016 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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var options [soMax]option
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func rtioctl(s uintptr, ioc uintptr, arg uintptr) syscall.Errno
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func ioctl(s uintptr, ioc int, b []byte) error {
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if errno := rtioctl(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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//go:cgo_import_dynamic libcGetsockopt __xnet_getsockopt "libsocket.so"
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//go:cgo_import_dynamic libcSetsockopt setsockopt "libsocket.so"
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//go:linkname libcGetsockopt libcGetsockopt
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//go:linkname libcSetsockopt libcSetsockopt
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var (
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libcGetsockopt uintptr
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libcSetsockopt uintptr
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)
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func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (uintptr, uintptr, syscall.Errno)
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func setsockopt(s uintptr, level, name int, b []byte) error {
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if _, _, errno := sysvicall6(uintptr(unsafe.Pointer(&libcSetsockopt)), 5, 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 := sysvicall6(uintptr(unsafe.Pointer(&libcGetsockopt)), 5, 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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