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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:
//
// TCP connection related definitions.
//
// This file contains the definitions for connection related structures,
// such as the TCPConnReq structure.
//
#define INVALID_CONN_INDEX 0xffffff
//
// Structure used for tracking Connect/Listen/Accept/Disconnect requests.
//
typedef struct TCPConnReq { struct TCPReq tcr_req; // General request structure.
#if DBG
ulong tcr_sig;#endif
struct _TDI_CONNECTION_INFORMATION *tcr_conninfo; // Where to return info.
struct _TDI_CONNECTION_INFORMATION *tcr_addrinfo; // Where to return info.
ushort tcr_flags; // Request flags.
ushort tcr_timeout; // Timeout value.
} TCPConnReq;#define tcr_signature 0x20524354 // 'TCR '
//
// Structure used for tracking abortive-disconnect requests.
//
typedef struct TCPAbortReq { RequestCompleteRoutine tar_rtn; // Completion routine.
void* tar_context; // User context.
} TCPAbortReq;
#define MAX_CONN_PER_BLOCK 256
//
// Structure of a block of TCP connections.
//
typedef struct TCPConnBlock { KSPIN_LOCK cb_lock; uint cb_freecons; uint cb_nextfree; uint cb_blockid; uint cb_conninst; void *cb_conn[MAX_CONN_PER_BLOCK];} TCPConnBlock;
//
// Prototype for TCPConn (see below) done handlers.
//
typedef void (*ConnDoneRtn)(struct TCPConn *, KIRQL);
//
// Structure of a TCP Connection.
// A TCP Connection points to a TCB and an address object.
//
typedef struct TCPConn {#if DBG
ulong tc_sig;#endif
Queue tc_q; // Linkage on AO.
struct TCB *tc_tcb; // Pointer to TCB for connection.
struct AddrObj *tc_ao; // Back pointer to AddrObj.
uchar tc_inst; // Instance number.
uchar tc_flags; // Flags for connection.
ushort tc_refcnt; // Count of TCBs which reference this conn.
void *tc_context; // User's context.
RequestCompleteRoutine tc_rtn; // Completion routine.
PVOID tc_rtncontext; // User context for completion routine.
ConnDoneRtn tc_donertn; // Routine to call when refcnt goes to 0.
uint tc_tcbflags; // Flags for TCB when it comes in.
ulong tc_owningpid; // Owning process id
uint tc_tcbkatime; // Initial keep alive time value for this conn.
uint tc_tcbkainterval; // Keep alive interval for this conn.
uint tc_window; // Default window for TCB.
TCPConnBlock *tc_ConnBlock; // Containing block for this conn.
uint tc_connid; // Cached dentifier for this conn.
} TCPConn;#define tc_signature 0x20204354 // 'TC '
#define CONN_CLOSING 1 // Connection is closing.
#define CONN_DISACC 2 // Connection is disassociating.
#define CONN_WINSET 4 // Window explictly set.
#define CONN_INVALID (CONN_CLOSING | CONN_DISACC)
#define CONN_INDEX(c) ((c) & 0xff)
#define CONN_BLOCKID(c) (((c) & 0xffff00) >> 8)
#define CONN_INST(c) ((uchar)((c) >> 24))
#define MAKE_CONN_ID(index,block,instance) ((((uint)(instance)) << 24) | \
(((uint)(block)) << 8) | \ ((uint)(index)))#define INVALID_CONN_ID (ULONG)-1
extern TCPConnBlock **ConnTable;
typedef struct TCPAddrCheck { IPv6Addr SourceAddress; uint TickCount;} TCPAddrCheckElement;
//
// External definitions for TDI entry points.
//
extern TDI_STATUS TdiOpenConnection(PTDI_REQUEST Request, PVOID Context);extern TDI_STATUS TdiCloseConnection(PTDI_REQUEST Request);extern TDI_STATUS TdiAssociateAddress(PTDI_REQUEST Request, HANDLE AddrHandle);extern TDI_STATUS TdiDisAssociateAddress(PTDI_REQUEST Request);extern TDI_STATUS TdiConnect(PTDI_REQUEST Request, void *Timeout, PTDI_CONNECTION_INFORMATION RequestAddr, PTDI_CONNECTION_INFORMATION ReturnAddr);extern TDI_STATUS TdiListen(PTDI_REQUEST Request, ushort Flags, PTDI_CONNECTION_INFORMATION AcceptableAddr, PTDI_CONNECTION_INFORMATION ConnectedAddr);extern TDI_STATUS TdiAccept(PTDI_REQUEST Request, PTDI_CONNECTION_INFORMATION AcceptInfo, PTDI_CONNECTION_INFORMATION ConnectedInfo);extern TDI_STATUS TdiDisconnect(PTDI_REQUEST Request, void *TO, ushort Flags, PTDI_CONNECTION_INFORMATION DiscConnInfo, PTDI_CONNECTION_INFORMATION ReturnInfo, TCPAbortReq *AbortReq);
extern struct TCPConnReq *GetConnReq(void);extern void FreeConnReq(struct TCPConnReq *FreedReq);extern void DerefTCB(struct TCB *DoneTCB, KIRQL Irql);extern void InitRCE(struct TCB *NewTCB);extern void AcceptConn(struct TCB *AcceptTCB, KIRQL Irql);extern void FreeConnID(TCPConn *Conn);extern void NotifyOfDisc(struct TCB *DiscTCB, TDI_STATUS Status, PKIRQL IrqlPtr);extern TCPConn *GetConnFromConnID(uint ConnID, KIRQL* Irql);extern void TryToCloseTCB(struct TCB *ClosedTCB, uchar Reason, KIRQL Irql);extern TDI_STATUS InitTCBFromConn(struct TCPConn *Conn, struct TCB *NewTCB, PTDI_CONNECTION_INFORMATION Addr, uint AOLocked);
extern void PushData(struct TCB *PushTCB);extern TDI_STATUS MapIPError(IP_STATUS IPError, TDI_STATUS Default);extern void GracefulClose(struct TCB *CloseTCB, uint ToTimeWait, uint Notify, KIRQL Irql);extern void RemoveTCBFromConn(struct TCB *RemovedTCB);extern void InitAddrChecks();extern int ConnCheckPassed(IPv6Addr *Src, ulong Prt);extern void EnumerateConnectionList(uchar *Buffer, ulong BufferSize, ulong *EntriesReturned, ulong *EntriesAvailable);
extern void GetRandomISN(SeqNum *Seq, uchar *TcbInvariants);
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