github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/net/internal/socket/cmsghdr_unix.go (about) 1 // Copyright 2020 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris || zos 6 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris zos 7 8 package socket 9 10 import "golang.org/x/sys/unix" 11 12 func controlHeaderLen() int { 13 return unix.CmsgLen(0) 14 } 15 16 func controlMessageLen(dataLen int) int { 17 return unix.CmsgLen(dataLen) 18 } 19 20 func controlMessageSpace(dataLen int) int { 21 return unix.CmsgSpace(dataLen) 22 }