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LinkOpaque.unpack()   A

↳ Parent: exabgp.bgp.message.update.attribute.bgpls.link.opaque

Complexity

Conditions 1

Size

Total Lines 4
Code Lines 3

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 1
eloc 3
nop 3
dl 0
loc 4
rs 10
c 0
b 0
f 0
1 
# encoding: utf-8
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"""
3 
opaque.py
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Created by Evelio Vila on 2016-12-01.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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Copyright (c) 2014-2017 Exa Networks. All rights reserved.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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"""

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from struct import pack

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from struct import unpack

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from exabgp.bgp.message.notification import Notify

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from exabgp.bgp.message.update.attribute.bgpls.linkstate import LinkState

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from exabgp.bgp.message.update.attribute.bgpls.linkstate import BaseLS

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#     0                   1                   2                   3

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#    |              Type             |             Length            |

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#    //                     Opaque link attributes (variable)       //

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#     https://tools.ietf.org/html/rfc7752#section-3.3.2.6 Opaque Link Attribute TLV

            


            
                                                                                                            
                            
            
                                    
            
            

                
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#

            


            
                                                                                                            
                            
            
                                    
            
            

                
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# This TLV is added here for completeness but we don't look into the TLV.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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@LinkState.register()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class LinkOpaque(object):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    TLV = 1097

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    REPR = 'Opaque Link attribute'

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    REPR = 'opaque-link'

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    @classmethod

            


            
                                                        
            
                                    
            
            

                
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    def unpack(cls, data, length):

            


            
                                                        
            
                                    
            
            

                
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        # XXX: cls.check(length)

            


            
                                                        
            
                                    
            
            

                
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        return cls(unpack("!%ds" % length, data[:length])[0])

            


            
                                                        
            
                                    
            
            

                
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