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build.backends.of_parser.process_packet_in()   A

↳ Parent: build.backends.of_parser

Complexity

Conditions 3

Size

Total Lines 18
Code Lines 8

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 8
CRAP Score 3

Importance

Changes 0
Metric Value
cc 3
eloc 8
nop 1
dl 0
loc 18
ccs 8
cts 8
cp 1
crap 3
rs 10
c 0
b 0
f 0
1 
"""
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    Module to transparently process OpenFlow requests,
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"""
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import napps.amlight.sdntrace.backends.openflow10 as openflow10

            


            
                                                                                                            
                            
            
                                    
            
            

                
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import napps.amlight.sdntrace.backends.openflow13 as openflow13

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from kytos.core import log

            


            
                                                                                                            
                            
            
                                    
            
            

                
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def process_packet_in(event):

            


            
                                                                        
                            
            
                                    
            
            

                
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    """

            


            
                                                                        
                            
            
                                    
            
            

                
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    Args:

            


            
                                                                        
                            
            
                                    
            
            

                
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        event

            


            
                                                                        
                            
            
                                    
            
            

                
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    Return:

            


            
                                                                        
                            
            
                                    
            
            

                
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        ethernet: frame

            


            
                                                                        
                            
            
                                    
            
            

                
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        in_port: incoming port

            


            
                                                                        
                            
            
                                    
            
            

                
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        switch: incoming switch

            


            
                                                                        
                            
            
                                    
            
            

                
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    """

            


            
                                                                        
                            
            
                                    
            
            

                
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    of_version = event.content['message'].header.version

            


            
                                                                        
                            
            
                                    
            
            

                
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    if of_version.value == 1:

            


            
                                                                        
                            
            
                                    
            
            

                
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        return openflow10.packet_in(event, event.content['message'])

            


            
                                                                        
                            
            
                                    
            
            

                
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    elif of_version.value == 4:

            


            
                                                                        
                            
            
                                    
            
            

                
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        return openflow13.packet_in(event, event.content['message'])

            


            
                                                                        
                            
            
                                    
            
            

                
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    log.error("Invalid OpenFlow version")

            


            
                                                                        
                            
            
                                    
            
            

                
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    return 0, 0, 0

            


            
                                                                                                            
                            
            
                                    
            
            

                
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def send_packet_out(controller, switch, port, data):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    """ Just prepare and send a PacketOut used by

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    the Tracer.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    Args:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        controller: Kytos controller

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        switch: OpenFlow datapath

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        port: in_port

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        data: Ethernet frame

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    """

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    of_version = switch.features.header.version

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    if of_version.value == 1:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        openflow10.send_packet_out(controller, switch, port, data)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    elif of_version.value == 4:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        openflow13.send_packet_out(controller, switch, port, data)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    else:

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        log.error("Invalid OpenFlow version")

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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        return

            


            
                                                        
            
                                    
            
            

                
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