// GateForward.decl // Last modified January 26, 1979 3:44 PM by Boggs manifest [ routeBcstInterval = 3000 //30 seconds psRouteInfo = 2 // well known, registered socket ptRouteRequest = 200b ptRouteReply = 201b ptRouteError = 202b ptStatsRequest = 203b ptStatsReply = 204b gfStatsVersion = 1 ] //---------------------------------------------------------------------------- structure Queue: // Singly linked list, usually maintained FIFO //---------------------------------------------------------------------------- [ head word // -> first thing; 0 if queue is empty tail word // -> last thing; undefined if queue is empty ] //---------------------------------------------------------------------------- structure Stats: //---------------------------------------------------------------------------- [ version word // = gfStatsVersion routeReqs word 2 // number of route info requests numNets word // number of networks numTMEs word // number of TMEs in this packet //numNets net numbers, one word each //numTMEs TMEs, 3 words each ] manifest lenStats = size Stats/16 //size of fixed part only //---------------------------------------------------------------------------- structure GF: // 'global frame' for Gateway Forwarder //---------------------------------------------------------------------------- [ tm word // -> Transit Matrix stats @Stats routeBcstTimer word // timer for broadcasting routing info iQ @Queue // forwarder input queue tQ @Queue // forwarder transmitted queue ] manifest lenGF = size GF/16 //---------------------------------------------------------------------------- structure TME: // Transit Matrix Entry //---------------------------------------------------------------------------- [ sdNet word = [ sNet byte; dNet byte ] count word 2 ] manifest lenTME = size TME/16 //---------------------------------------------------------------------------- structure TM: [ @HTP; TME↑0,1:@TME ] // Transit Matrix hash table //----------------------------------------------------------------------------