diff options
Diffstat (limited to 'src/pkg/syscall/sockcmsg_unix.go')
-rw-r--r-- | src/pkg/syscall/sockcmsg_unix.go | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/src/pkg/syscall/sockcmsg_unix.go b/src/pkg/syscall/sockcmsg_unix.go deleted file mode 100644 index f0c05eaf3..000000000 --- a/src/pkg/syscall/sockcmsg_unix.go +++ /dev/null @@ -1,65 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Socket control messages - -package syscall - -import ( - "unsafe" -) - -// Round the length of a raw sockaddr up to align it propery. -func cmsgAlignOf(salen int) int { - salign := sizeofPtr - // NOTE: It seems like 64-bit Darwin kernel still requires 32-bit - // aligned access to BSD subsystem. - if darwinAMD64 { - salign = 4 - } - if salen == 0 { - return salign - } - return (salen + salign - 1) & ^(salign - 1) -} - -func cmsgLen(datalen int) int { - return cmsgAlignOf(SizeofCmsghdr) + datalen -} - -type SocketControlMessage struct { - Header Cmsghdr - Data []byte -} - -func ParseSocketControlMessage(buf []byte) ([]SocketControlMessage, int) { - var ( - h *Cmsghdr - dbuf []byte - e int - cmsgs []SocketControlMessage - ) - - for len(buf) >= cmsgLen(0) { - h, dbuf, e = socketControlMessageHeaderAndData(buf) - if e != 0 { - break - } - m := SocketControlMessage{} - m.Header = *h - m.Data = dbuf[:int(h.Len)-cmsgAlignOf(SizeofCmsghdr)] - cmsgs = append(cmsgs, m) - buf = buf[cmsgAlignOf(int(h.Len)):] - } - - return cmsgs, e -} - -func socketControlMessageHeaderAndData(buf []byte) (*Cmsghdr, []byte, int) { - h := (*Cmsghdr)(unsafe.Pointer(&buf[0])) - if h.Len < SizeofCmsghdr || int(h.Len) > len(buf) { - return nil, nil, EINVAL - } - return h, buf[cmsgAlignOf(SizeofCmsghdr):], 0 -} |