[pim] ABOUT Update_SPTbit(S,G,iif)

["CTO YAO Chunyan" <Chunyan.YAO at alcatel-sbell.com.cn>]

Title: Message

Dear all, SPTbit is updated as follows:

     void
     Update_SPTbit(S,G,iif) {
       if ( iif == RPF_interface(S)
             AND JoinDesired(S,G) == TRUE
             AND ( DirectlyConnected(S) == TRUE
                   OR RPF_interface(S) != RPF_interface(RP(G))
                   OR inherited_olist(S,G,rpt) == NULL
                   OR ( ( RPF'(S,G) == RPF'(*,G) ) AND
                        ( RPF'(S,G) != NULL ) )
                   OR ( I_Am_Assert_Loser(S,G,iif) ) {
          Set SPTbit(S,G) to TRUE
       }
     }
 

 

I don't understand HOW the last one condition " I_Am_Assert_Loser(S,G,iif)" along with "iif == RPF_interface(S)AND JoinDesired(S,G) == TRUE" can show that source-specific-tree is OK?

 

Could you tell me what the condition " I_Am_Assert_Loser(S,G,iif)"mean?

 

 

Thanks a lot in advance!

 

                       Chunyan   

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