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 } 91
