interface_openbsd.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 (*wireFormat) parseInterfaceMessage(b []byte) (Message, error) {
  10  	if len(b) < 32 {
  11  		return nil, errMessageTooShort
  12  	}
  13  	l := int(nativeEndian.Uint16(b[:2]))
  14  	if len(b) < l {
  15  		return nil, errInvalidMessage
  16  	}
  17  	attrs := uint(nativeEndian.Uint32(b[12:16]))
  18  	if attrs&syscall.RTA_IFP == 0 {
  19  		return nil, nil
  20  	}
  21  	m := &InterfaceMessage{
  22  		Version: int(b[2]),
  23  		Type:    int(b[3]),
  24  		Flags:   int(nativeEndian.Uint32(b[16:20])),
  25  		Index:   int(nativeEndian.Uint16(b[6:8])),
  26  		Addrs:   []Addr{:syscall.RTAX_MAX},
  27  		raw:     b[:l],
  28  	}
  29  	ll := int(nativeEndian.Uint16(b[4:6]))
  30  	if len(b) < ll {
  31  		return nil, errInvalidMessage
  32  	}
  33  	a, err := parseLinkAddr(b[ll:])
  34  	if err != nil {
  35  		return nil, err
  36  	}
  37  	m.Addrs[syscall.RTAX_IFP] = a
  38  	m.Name = a.(*LinkAddr).Name
  39  	return m, nil
  40  }
  41  
  42  func (*wireFormat) parseInterfaceAddrMessage(b []byte) (Message, error) {
  43  	if len(b) < 24 {
  44  		return nil, errMessageTooShort
  45  	}
  46  	l := int(nativeEndian.Uint16(b[:2]))
  47  	if len(b) < l {
  48  		return nil, errInvalidMessage
  49  	}
  50  	bodyOff := int(nativeEndian.Uint16(b[4:6]))
  51  	if len(b) < bodyOff {
  52  		return nil, errInvalidMessage
  53  	}
  54  	m := &InterfaceAddrMessage{
  55  		Version: int(b[2]),
  56  		Type:    int(b[3]),
  57  		Flags:   int(nativeEndian.Uint32(b[12:16])),
  58  		Index:   int(nativeEndian.Uint16(b[6:8])),
  59  		raw:     b[:l],
  60  	}
  61  	var err error
  62  	m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[12:16])), b[bodyOff:])
  63  	if err != nil {
  64  		return nil, err
  65  	}
  66  	return m, nil
  67  }
  68