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/********************************************************************//** Microsoft LAN Manager **//** Copyright(c) Microsoft Corp., 1990-1993 **//********************************************************************//* :ts=4 */
//** TCB.H - TCB management definitions.
//
// This file contains the definitons needed for TCB management.
//
extern uint MaxHashTableSize;#define TCB_TABLE_SIZE MaxHashTableSize
extern uint LogPerPartitionSize;
#define GET_PARTITION(i) (i >> (ulong) LogPerPartitionSize)
#define MAX_REXMIT_CNT 5
#define MAX_CONNECT_REXMIT_CNT 2 //dropped from 3 to 2
#define MAX_CONNECT_RESPONSE_REXMIT_CNT 2
#define ADAPTED_MAX_CONNECT_RESPONSE_REXMIT_CNT 1
extern uint TCPTime;
#define ROR8(x) (ushort)( ( (ushort)(x) >> 1) | (ushort) ( ( (ushort)(x) & 1) << 15) )
#define TCB_HASH(DA,SA,DP,SP) (uint)( ((uint)(ROR8( ROR8 (ROR8( *(ushort*)&(DP)+ \
*(ushort *)&(SP) ) + *(ushort *)&(DA) )+ \*((ushort *)&(DA)+1) ) ) ) & (TCB_TABLE_SIZE-1))
// These values indicate what action should be taken upon return
// of FindSynTCB - sending a reset, restting out own connection or
// just dropping the packet that was received.
#define SYN_PKT_SEND_RST 0x01
#define SYN_PKT_RST_RCVD 0x02
#define SYN_PKT_DROP 0x03
// Maximum Increment of 32K per connection.
#define MAX_ISN_INCREMENT_PER_CONNECTION 0x7FFF
// Number of connections that can increment the ISN per 100ms without
// the problem of old duplicates being a threat. Note that, this still does
// not guarantee that "wrap-around of sequence number space does not
// happen within 2MSL", which could lead to failures in reuse of Time-wait
// TCBs etc.
#define MAX_ISN_INCREMENTABLE_CONNECTIONS_PER_100MS ((0xFFFFFFFF) / \
(MAX_REXMIT_TO * MAX_ISN_INCREMENT_PER_CONNECTION ))
// Converts a quantity represented in 100 ns units to ms.
#define X100NSTOMS(x) ((x)/10000)
extern ULONG GetDeltaTime();
extern struct TCB *FindTCB(IPAddr Src, IPAddr Dest, ushort DestPort, ushort SrcPort,CTELockHandle *Handle, BOOLEAN Dpc,uint *index);
extern struct TCB * FindSynTCB(IPAddr Src, IPAddr Dest, ushort DestPort, ushort SrcPort, TCPRcvInfo RcvInfo, uint Size, uint index, PUCHAR Action);
extern uint InsertTCB(struct TCB *NewTCB, BOOLEAN ForceInsert);extern struct TCB *AllocTCB(void);extern struct SYNTCB *AllocSynTCB(void);
extern struct TWTCB *AllocTWTCB(uint index);extern void FreeTCB(struct TCB *FreedTCB);extern void FreeSynTCB(struct SYNTCB *FreedTCB);extern void FreeTWTCB(struct TWTCB *FreedTCB);
extern uint RemoveTCB(struct TCB *RemovedTCB, uint PreviousState);
extern void RemoveTWTCB(struct TWTCB *RemovedTCB, uint Partition);
extern struct TWTCB *FindTCBTW(IPAddr Src, IPAddr Dest, ushort DestPort, ushort SrcPort,uint index);
extern uint RemoveAndInsert(struct TCB *RemovedTCB);
extern uint ValidateTCBContext(void *Context, uint *Valid);extern uint ReadNextTCB(void *Context, void *OutBuf);
extern int InitTCB(void);extern void UnInitTCB(void);extern void TCBWalk(uint (*CallRtn)(struct TCB *, void *, void *, void *), void *Context1, void *Context2, void *Context3);extern uint DeleteTCBWithSrc(struct TCB *CheckTCB, void *AddrPtr, void *Unused1, void *Unused2);extern uint SetTCBMTU(struct TCB *CheckTCB, void *DestPtr, void *SrcPtr, void *MTUPtr);extern void ReetSendNext(struct TCB *SeqTCB, SeqNum DropSeq);extern uint InsertSynTCB(SYNTCB * NewTCB,CTELockHandle *Handle);extern ushort FindMSSAndOptions(TCPHeader UNALIGNED * TCPH, TCB * SynTCB, BOOLEAN syntcb);extern void SendSYNOnSynTCB(SYNTCB * SYNTcb,CTELockHandle TCBHandle);extern void AddHalfOpenTCB(void);extern void AddHalfOpenRetry(uint RexmitCnt);extern void DropHalfOpenTCB(uint RexmitCnt);
extern uint TCBWalkCount;extern uint NumTcbTablePartions;extern uint PerPartionSize;extern uint LogPerPartion;
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