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IV45198: UPD PACKETS OF ZERO LENGTH NOT READ BY UDP_RECEIVE() APPLIES TO AIX 7100-02 14/02/20 PTF PECHANGE

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APAR status

  • Closed as program error.

Error description

  • Symptom:
UDP traffic with zero length as the payload will not be
responded to from the receiving end.

IPtrace will show the packet is received on the receiving
end but not responded to.

If truss is run:
truss <application>

It will show program stops at and never proceeds
_enrecvfrom()

If another UDP packet of zero length is sent, the program
proceeds past _enrecvfrom().

Local fix

  • Send data packets with at least 1 byte of payload.

Problem summary

  • ****************************************************************
* USERS AFFECTED:
* Systems running the 7100-02 Technology Level with the
* bos.net.tcp.client fileset at the 7.1..15 or 7.1.2.16 level.
****************************************************************
* PROBLEM DESCRIPTION:
* Symptom:
* UDP traffic with zero length as the payload will not be
* responded to from the receiving end.
* IPtrace will show the packet is received on the receiving
* end but not responded to.
* If truss is run:
* truss <application>
* It will show program stops at and never proceeds
* _enrecvfrom()
* If another UDP packet of zero length is sent, the program
* proceeds past _enrecvfrom().
****************************************************************
* RECOMMENDATION:
* Install APAR IV45198.
****************************************************************

Problem conclusion

  • Fix udp receive path to accept packet with 0-length payload.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV45198
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    YesPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2013-07-04
    • 

  • Closed date
    2013-08-22
    • 

  • Last modified date
    2014-02-20
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    
IV46620 IV46651 IV46804
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U858754
       UP14/02/14  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

              [{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            20 February 2014
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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