usb-ks

USB Killswitch
git clone git://git.laack.co/usb-ks.git
Log | Files | Refs | README | LICENSE

sockcmsg_unix_other.go (1295B)

      1 // Copyright 2019 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 || freebsd || linux || netbsd || openbsd || solaris || zos
      6 // +build aix darwin freebsd linux netbsd openbsd solaris zos
      7 
      8 package unix
      9 
     10 import (
     11 	"runtime"
     12 )
     13 
     14 // Round the length of a raw sockaddr up to align it properly.
     15 func cmsgAlignOf(salen int) int {
     16 	salign := SizeofPtr
     17 
     18 	// dragonfly needs to check ABI version at runtime, see cmsgAlignOf in
     19 	// sockcmsg_dragonfly.go
     20 	switch runtime.GOOS {
     21 	case "aix":
     22 		// There is no alignment on AIX.
     23 		salign = 1
     24 	case "darwin", "ios", "illumos", "solaris":
     25 		// NOTE: It seems like 64-bit Darwin, Illumos and Solaris
     26 		// kernels still require 32-bit aligned access to network
     27 		// subsystem.
     28 		if SizeofPtr == 8 {
     29 			salign = 4
     30 		}
     31 	case "netbsd", "openbsd":
     32 		// NetBSD and OpenBSD armv7 require 64-bit alignment.
     33 		if runtime.GOARCH == "arm" {
     34 			salign = 8
     35 		}
     36 		// NetBSD aarch64 requires 128-bit alignment.
     37 		if runtime.GOOS == "netbsd" && runtime.GOARCH == "arm64" {
     38 			salign = 16
     39 		}
     40 	case "zos":
     41 		// z/OS socket macros use [32-bit] sizeof(int) alignment,
     42 		// not pointer width.
     43 		salign = SizeofInt
     44 	}
     45 
     46 	return (salen + salign - 1) & ^(salign - 1)
     47 }