msghdr_bsd.go raw

   1  // Copyright 2017 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 || netbsd || openbsd
   6  
   7  package socket
   8  
   9  import "unsafe"
  10  
  11  func (h *msghdr) pack(vs []iovec, bs [][]byte, oob []byte, sa []byte) {
  12  	for i := range vs {
  13  		vs[i].set(bs[i])
  14  	}
  15  	h.setIov(vs)
  16  	if len(oob) > 0 {
  17  		h.Control = (*byte)(unsafe.Pointer(&oob[0]))
  18  		h.Controllen = uint32(len(oob))
  19  	}
  20  	if sa != nil {
  21  		h.Name = (*byte)(unsafe.Pointer(&sa[0]))
  22  		h.Namelen = uint32(len(sa))
  23  	}
  24  }
  25  
  26  func (h *msghdr) name() []byte {
  27  	if h.Name != nil && h.Namelen > 0 {
  28  		return (*[sizeofSockaddrInet6]byte)(unsafe.Pointer(h.Name))[:h.Namelen]
  29  	}
  30  	return nil
  31  }
  32  
  33  func (h *msghdr) controllen() int {
  34  	return int(h.Controllen)
  35  }
  36  
  37  func (h *msghdr) flags() int {
  38  	return int(h.Flags)
  39  }
  40