266 lines
5.8 KiB
C
266 lines
5.8 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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rtmp.h
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Abstract:
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This module contains information for the Routing Table Maintainance Protocol.
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Author:
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Jameel Hyder (jameelh@microsoft.com)
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Nikhil Kamkolkar (nikhilk@microsoft.com)
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Revision History:
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19 Jun 1992 Initial Version
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Notes: Tab stop: 4
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--*/
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#ifndef _RTMP_
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#define _RTMP_
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// RTMP specific data.
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#define RTMP_REQUEST 1
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#define RTMP_DATA_REQUEST 2
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#define RTMP_ENTIRE_DATA_REQUEST 3
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#define RTMP_REQ_DATAGRAM_SIZE 1
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#define RTMP_DATA_MIN_SIZE_EXT 10
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#define RTMP_DATA_MIN_SIZE_NON_EXT 7
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#define RTMP_RESPONSE_MAX_SIZE 10
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#define RTMP_VERSION (BYTE)0x82
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#define RTMP_TUPLE_WITHRANGE (BYTE)0x80
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#define RTMP_TUPLE_WITHOUTRANGE (BYTE)0x00
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#define RTMP_EXT_TUPLE_MASK 0x80
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#define RTMP_MAX_HOPS 0x0F
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#define RTMP_NUM_HOPS_MASK 0x1F
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#define RTMP_EXT_TUPLE_SIZE 6
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// When trying to find our network number on a non-extended port.
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#define RTMP_REQUEST_WAIT 100 // MilliSeconds
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#define RTMP_NUM_REQUESTS 30
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// The actual RTMP routing table. Entries are hashed by target network number
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// and contain the port number used to get to the target network, next bridge
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// used to get to the target network, the number of hops to that network,
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// and entry state (Good, Suspect, or Bad). Note that with AppleTalk phase II,
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// it takes two Validity timers to get from Suspect to Bad, so we let an entry
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// go through a PrettyBad state (we won't send these guys when the Send timer goes off).
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#define GOOD 1
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#define SUSPECT 2
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#define BAD 3
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#define UGLY 4
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extern ATALK_SPIN_LOCK AtalkRteLock;
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#define RTE_ZONELIST_VALID 0x01
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#define RTE_DELETE 0x80
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#define RTE_SIGNATURE *(PULONG)"RTMP"
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#if DBG
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#define VALID_RTE(pRte) ((pRte != NULL) && (pRte->rte_Signature == RTE_SIGNATURE))
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#else
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#define VALID_RTE(pRte) (pRte != NULL)
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#endif
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typedef struct _RoutingTableEntry
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{
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#if DBG
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ULONG rte_Signature;
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#endif
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struct _RoutingTableEntry * rte_Next;
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// Hashed by first network number,
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// overflow buckets.
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PPORT_DESCRIPTOR rte_PortDesc; // Port used to access this network range
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LONG rte_RefCount; // Reference count
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BYTE rte_Flags;
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BYTE rte_State; // State of the rtmp entry
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BYTE rte_NumHops; // Hops to get to net
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ATALK_NETWORKRANGE rte_NwRange; // The network range that we represent
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ATALK_NODEADDR rte_NextRouter; // Node number of next router on
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// the way to this net range
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struct _ZONE_LIST * rte_ZoneList; // Valid zones for this net
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ATALK_SPIN_LOCK rte_Lock;
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} RTE, *PRTE;
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#define NUM_RTMP_HASH_BUCKETS 15
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extern PRTE * AtalkRoutingTable;
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// To decrease the odds of having to do a scan of the routing tables to
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// find where to route a packet, we keep a cache of "recently used routes".
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// This cache is checked before we use the "first network number" hash and
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// before we resort of a full scan of the routing tables. The size of this
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// cache may want to be increased to get a proportional increase in
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// "hit rate".
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#define NUM_RECENT_ROUTES 63
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extern PRTE * AtalkRecentRoutes;
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// RTMP timer values:
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#define RTMP_SEND_TIMER 100 // In 100ms units
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#define RTMP_VALIDITY_TIMER 200 // In 100ms units
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#define RTMP_AGING_TIMER 500 // In 100ms units
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// RTMP Offsets into the Datagram
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#define RTMP_REQ_CMD_OFF 0
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#define RTMP_SENDER_NW_OFF 0
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#define RTMP_SENDER_IDLEN_OFF 2
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#define RTMP_SENDER_ID_OFF 3
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#define RTMP_VERSION_OFF_NE 6
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#define RTMP_RANGE_START_OFF 4
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#define RTMP_TUPLE_TYPE_OFF 6
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#define RTMP_RANGE_END_OFF 7
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#define RTMP_VERSION_OFF_EXT 9
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ATALK_ERROR
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AtalkRtmpInit(
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IN BOOLEAN Init
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);
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BOOLEAN
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AtalkInitRtmpStartProcessingOnPort(
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IN PPORT_DESCRIPTOR pPortDesc,
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IN PATALK_NODEADDR RouterNode
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);
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extern
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VOID
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AtalkRtmpPacketIn(
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IN PPORT_DESCRIPTOR pPortDesc,
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IN PDDP_ADDROBJ pDdpAddr,
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IN PBYTE pPkt,
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IN USHORT PktLen,
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IN PATALK_ADDR pSrcAddr,
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IN PATALK_ADDR pDstAddr,
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IN ATALK_ERROR ErrorCode,
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IN BYTE DdpType,
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IN PVOID pHandlerCtx,
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IN BOOLEAN OptimizePath,
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IN PVOID OptimizeCtx
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);
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extern
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VOID
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AtalkRtmpPacketInRouter(
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IN PPORT_DESCRIPTOR pPortDesc,
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IN PDDP_ADDROBJ pDdpAddr,
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IN PBYTE pPkt,
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IN USHORT PktLen,
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IN PATALK_ADDR pSrcAddr,
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IN PATALK_ADDR pDstAddr,
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IN ATALK_ERROR ErrorCode,
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IN BYTE DdpType,
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IN PVOID pHandlerCtx,
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IN BOOLEAN OptimizePath,
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IN PVOID OptimizeCtx
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);
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extern
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PRTE
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AtalkRtmpReferenceRte(
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IN USHORT Network
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);
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extern
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BOOLEAN
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atalkRtmpRemoveRte(
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IN USHORT Network
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);
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extern
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VOID
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AtalkRtmpDereferenceRte(
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IN PRTE pRte,
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IN BOOLEAN LockHeld
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);
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extern
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BOOLEAN
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atalkRtmpCreateRte(
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IN ATALK_NETWORKRANGE NwRange,
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IN PPORT_DESCRIPTOR pPortDesc,
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IN PATALK_NODEADDR pNextRouter,
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IN int NumHops
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);
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LONG FASTCALL
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AtalkRtmpAgingTimer(
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IN PTIMERLIST pContext,
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IN BOOLEAN TimerShuttingDown
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);
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VOID FASTCALL
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AtalkRtmpKillPortRtes(
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IN PPORT_DESCRIPTOR pPortDesc
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);
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typedef struct _RtmpSendDataHdr
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{
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BYTE rsd_RouterNetwork[2];
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BYTE rsd_IdLength;
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} *PRTMPSENDDATAHDR;
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typedef struct _RtmpTupleNonExt
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{
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BYTE rtne_Network[2];
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BYTE rtne_RangenDist;
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} *PRTMPTUPLE;
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typedef struct _RtmpTupleExt
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{
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BYTE rtne_NetworkStart[2];
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BYTE rtne_RangenDist;
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BYTE rtne_NetworkEnd[2];
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BYTE rtne_Version;
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} *PRTMPTUPLEEXT;
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extern TIMERLIST atalkRtmpVTimer;
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extern BOOLEAN atalkRtmpVdtTmrRunning;
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LOCAL VOID
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atalkRtmpSendRoutingData(
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IN PPORT_DESCRIPTOR pPortDesc,
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IN PATALK_ADDR pDstAddr,
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IN BOOLEAN fSplitHorizon
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);
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LOCAL BOOLEAN
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atalkRtmpGetOrSetNetworkNumber(
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IN PPORT_DESCRIPTOR pPortDesc,
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IN USHORT SuggestedNetwork
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);
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LOCAL LONG FASTCALL
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atalkRtmpSendTimer(
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IN PTIMERLIST pContext,
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IN BOOLEAN TimerShuttingDown
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);
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LOCAL LONG FASTCALL
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atalkRtmpValidityTimer(
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IN PTIMERLIST pContext,
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IN BOOLEAN TimerShuttingDown
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);
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LOCAL VOID FASTCALL
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atalkRtmpSendComplete(
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IN NDIS_STATUS Status,
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IN PSEND_COMPL_INFO pSendInfo
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);
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#endif // _RTMP_
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