interface_freebsd.mx raw

   1  // Copyright 2016 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  package routebsd
   6  
   7  import "syscall"
   8  
   9  func (w *wireFormat) parseInterfaceMessage(b []byte) (Message, error) {
  10  	extOff := w.extOff
  11  	bodyOff := w.bodyOff
  12  	if len(b) < extOff || len(b) < bodyOff {
  13  		return nil, errInvalidMessage
  14  	}
  15  	l := int(nativeEndian.Uint16(b[:2]))
  16  	if len(b) < l {
  17  		return nil, errInvalidMessage
  18  	}
  19  	attrs := uint(nativeEndian.Uint32(b[4:8]))
  20  	if attrs&syscall.RTA_IFP == 0 {
  21  		return nil, nil
  22  	}
  23  	m := &InterfaceMessage{
  24  		Version: int(b[2]),
  25  		Type:    int(b[3]),
  26  		Flags:   int(nativeEndian.Uint32(b[8:12])),
  27  		Index:   int(nativeEndian.Uint16(b[12:14])),
  28  		Addrs:   []Addr{:syscall.RTAX_MAX},
  29  		extOff:  extOff,
  30  		raw:     b[:l],
  31  	}
  32  	a, err := parseLinkAddr(b[bodyOff:])
  33  	if err != nil {
  34  		return nil, err
  35  	}
  36  	m.Addrs[syscall.RTAX_IFP] = a
  37  	m.Name = a.(*LinkAddr).Name
  38  	return m, nil
  39  }
  40  
  41  func (w *wireFormat) parseInterfaceAddrMessage(b []byte) (Message, error) {
  42  	bodyOff := w.bodyOff
  43  	if len(b) < bodyOff {
  44  		return nil, errInvalidMessage
  45  	}
  46  	l := int(nativeEndian.Uint16(b[:2]))
  47  	if len(b) < l {
  48  		return nil, errInvalidMessage
  49  	}
  50  	m := &InterfaceAddrMessage{
  51  		Version: int(b[2]),
  52  		Type:    int(b[3]),
  53  		Flags:   int(nativeEndian.Uint32(b[8:12])),
  54  		Index:   int(nativeEndian.Uint16(b[12:14])),
  55  		raw:     b[:l],
  56  	}
  57  	var err error
  58  	m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[4:8])), b[bodyOff:])
  59  	if err != nil {
  60  		return nil, err
  61  	}
  62  	return m, nil
  63  }
  64