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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil -*- (for GNU Emacs)
//
// Copyright (c) 1985-2000 Microsoft Corporation
//
// This file is part of the Microsoft Research IPv6 Network Protocol Stack.
// You should have received a copy of the Microsoft End-User License Agreement
// for this software along with this release; see the file "license.txt".
// If not, please see http://www.research.microsoft.com/msripv6/license.htm,
// or write to Microsoft Research, One Microsoft Way, Redmond, WA 98052-6399.
//
// Abstract:
//
// Definitions for TCP Control Block management.
//
#define MAX_REXMIT_CNT 5
#define MAX_CONNECT_REXMIT_CNT 2 // Dropped from 3 to 2 to match IPv4.
extern uint TCPTime;extern SeqNum ISNMonotonicPortion;
// 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)
//
// REVIEW: better hash function for IPv6 addresses?
//
#ifdef OLDHASH1
#define TCB_HASH(DA,SA,DP,SP) ((uint)(*(uchar *)&(DA) + *((uchar *)&(DA) + 1) \
+ *((uchar *)&(DA) + 2) + *((uchar *)&(DA) + 3)) % TcbTableSize)#endif
#ifdef OLDHASH
#define TCB_HASH(DA,SA,DP,SP) (((DA) + (SA) + (uint)(DP) + (uint)(SP)) % \
TcbTableSize)#endif
#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)))) & \ (TcbTableSize - 1))
extern struct TCB *FindTCB(IPv6Addr *Src, IPv6Addr *Dest, uint SrcScopeId, uint DestScopeId, ushort SrcPort, ushort DestPort);extern uint InsertTCB(struct TCB *NewTCB);extern struct TCB *AllocTCB(void);extern void FreeTCB(struct TCB *FreedTCB);extern uint RemoveTCB(struct TCB *RemovedTCB);
extern uint ValidateTCBContext(void *Context, uint *Valid);extern uint ReadNextTCB(void *Context, void *OutBuf);
extern int InitTCB(void);extern void UnloadTCB(void);extern void CalculateMSSForTCB(struct TCB *);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 TCBWalkCount;
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