vendor/golang.org/x/net/route/interface_openbsd.go

   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 route
   6
   7 func (*wireFormat) parseInterfaceMessage(_ RIBType, b []byte) (Message, error) {
   8         if len(b) < 32 {
   9                 return nil, errMessageTooShort
  10         }
  11         l := int(nativeEndian.Uint16(b[:2]))
  12         if len(b) < l {
  13                 return nil, errInvalidMessage
  14         }
  15         attrs := uint(nativeEndian.Uint32(b[12:16]))
  16         if attrs&sysRTA_IFP == 0 {
  17                 return nil, nil
  18         }
  19         m := &InterfaceMessage{
  20                 Version: int(b[2]),
  21                 Type:    int(b[3]),
  22                 Flags:   int(nativeEndian.Uint32(b[16:20])),
  23                 Index:   int(nativeEndian.Uint16(b[6:8])),
  24                 Addrs:   make([]Addr, sysRTAX_MAX),
  25                 raw:     b[:l],
  26         }
  27         ll := int(nativeEndian.Uint16(b[4:6]))
  28         if len(b) < ll {
  29                 return nil, errInvalidMessage
  30         }
  31         a, err := parseLinkAddr(b[ll:])
  32         if err != nil {
  33                 return nil, err
  34         }
  35         m.Addrs[sysRTAX_IFP] = a
  36         m.Name = a.(*LinkAddr).Name
  37         return m, nil
  38 }
  39
  40 func (*wireFormat) parseInterfaceAddrMessage(_ RIBType, b []byte) (Message, error) {
  41         if len(b) < 24 {
  42                 return nil, errMessageTooShort
  43         }
  44         l := int(nativeEndian.Uint16(b[:2]))
  45         if len(b) < l {
  46                 return nil, errInvalidMessage
  47         }
  48         bodyOff := int(nativeEndian.Uint16(b[4:6]))
  49         if len(b) < bodyOff {
  50                 return nil, errInvalidMessage
  51         }
  52         m := &InterfaceAddrMessage{
  53                 Version: int(b[2]),
  54                 Type:    int(b[3]),
  55                 Flags:   int(nativeEndian.Uint32(b[12:16])),
  56                 Index:   int(nativeEndian.Uint16(b[6:8])),
  57                 raw:     b[:l],
  58         }
  59         var err error
  60         m.Addrs, err = parseAddrs(uint(nativeEndian.Uint32(b[12:16])), parseKernelInetAddr, b[bodyOff:])
  61         if err != nil {
  62                 return nil, err
  63         }
  64         return m, nil
  65 }
  66
  67 func (*wireFormat) parseInterfaceAnnounceMessage(_ RIBType, b []byte) (Message, error) {
  68         if len(b) < 26 {
  69                 return nil, errMessageTooShort
  70         }
  71         l := int(nativeEndian.Uint16(b[:2]))
  72         if len(b) < l {
  73                 return nil, errInvalidMessage
  74         }
  75         m := &InterfaceAnnounceMessage{
  76                 Version: int(b[2]),
  77                 Type:    int(b[3]),
  78                 Index:   int(nativeEndian.Uint16(b[6:8])),
  79                 What:    int(nativeEndian.Uint16(b[8:10])),
  80                 raw:     b[:l],
  81         }
  82         for i := 0; i < 16; i++ {
  83                 if b[10+i] != 0 {
  84                         continue
  85                 }
  86                 m.Name = string(b[10 : 10+i])
  87                 break
  88         }
  89         return m, nil
  90 }