diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/sockcmsg_unix.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/sockcmsg_unix.go | 36 |
1 files changed, 4 insertions, 32 deletions
diff --git a/vendor/golang.org/x/sys/unix/sockcmsg_unix.go b/vendor/golang.org/x/sys/unix/sockcmsg_unix.go index 062bcabab..003916ed7 100644 --- a/vendor/golang.org/x/sys/unix/sockcmsg_unix.go +++ b/vendor/golang.org/x/sys/unix/sockcmsg_unix.go @@ -9,35 +9,9 @@ package unix import ( - "runtime" "unsafe" ) -// Round the length of a raw sockaddr up to align it properly. -func cmsgAlignOf(salen int) int { - salign := SizeofPtr - - switch runtime.GOOS { - case "aix": - // There is no alignment on AIX. - salign = 1 - case "darwin", "dragonfly", "solaris", "illumos": - // NOTE: It seems like 64-bit Darwin, DragonFly BSD, - // illumos, and Solaris kernels still require 32-bit - // aligned access to network subsystem. - if SizeofPtr == 8 { - salign = 4 - } - case "netbsd", "openbsd": - // NetBSD and OpenBSD armv7 require 64-bit alignment. - if runtime.GOARCH == "arm" { - salign = 8 - } - } - - return (salen + salign - 1) & ^(salign - 1) -} - // CmsgLen returns the value to store in the Len field of the Cmsghdr // structure, taking into account any necessary alignment. func CmsgLen(datalen int) int { @@ -50,8 +24,8 @@ func CmsgSpace(datalen int) int { return cmsgAlignOf(SizeofCmsghdr) + cmsgAlignOf(datalen) } -func cmsgData(h *Cmsghdr) unsafe.Pointer { - return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(SizeofCmsghdr))) +func (h *Cmsghdr) data(offset uintptr) unsafe.Pointer { + return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(SizeofCmsghdr)) + offset) } // SocketControlMessage represents a socket control message. @@ -94,10 +68,8 @@ func UnixRights(fds ...int) []byte { h.Level = SOL_SOCKET h.Type = SCM_RIGHTS h.SetLen(CmsgLen(datalen)) - data := cmsgData(h) - for _, fd := range fds { - *(*int32)(data) = int32(fd) - data = unsafe.Pointer(uintptr(data) + 4) + for i, fd := range fds { + *(*int32)(h.data(4 * uintptr(i))) = int32(fd) } return b } |