mirror of
https://github.com/golang/net.git
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0a1ea396d5
Instead of duplicating the logic for cmsg alignment, use CmsgLen and CmsgSpace from golang.org/x/sys/unix. Moreover, this should simplify adding new ports. Change-Id: Ic3ac9cf14781eff5b8e4f34bfd2b1c8bd3b69341 Reviewed-on: https://go-review.googlesource.com/c/net/+/259058 Trust: Tobias Klauser <tobias.klauser@gmail.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matt Layher <mdlayher@gmail.com>
54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
// Copyright 2017 The Go Authors. 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 socket
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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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sysSETSOCKOPT = 0xe
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sysGETSOCKOPT = 0xf
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sysSENDMSG = 0x10
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sysRECVMSG = 0x11
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sysRECVMMSG = 0x13
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sysSENDMMSG = 0x14
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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 rawsocketcall(call, a0, a1, a2, a3, a4, a5 uintptr) (uintptr, syscall.Errno)
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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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_, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(unsafe.Pointer(&l)), 0)
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return int(l), errnoErr(errno)
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}
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func setsockopt(s uintptr, level, name int, b []byte) error {
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_, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(unsafe.Pointer(&b[0])), uintptr(len(b)), 0)
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return errnoErr(errno)
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}
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func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
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n, errno := socketcall(sysRECVMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
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return int(n), errnoErr(errno)
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}
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func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
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n, errno := socketcall(sysSENDMSG, s, uintptr(unsafe.Pointer(h)), uintptr(flags), 0, 0, 0)
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return int(n), errnoErr(errno)
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}
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func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
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n, errno := socketcall(sysRECVMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
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return int(n), errnoErr(errno)
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}
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func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
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n, errno := socketcall(sysSENDMMSG, s, uintptr(unsafe.Pointer(&hs[0])), uintptr(len(hs)), uintptr(flags), 0, 0)
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return int(n), errnoErr(errno)
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}
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