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/********************************************************************//** Microsoft LAN Manager **//** Copyright(c) Microsoft Corp., 1990-2000 **//********************************************************************//* :ts=4 */
//** TCPCONN.H - 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.
#define tcr_signature 0x20524354 // 'TCR '
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; ushort tcr_flags; // Flags for this request.
ushort tcr_timeout; // Timeout value for this request.
} TCPConnReq;
#define TCR_FLAG_QUERY_ACCEPT 0x0001 // Consult client before accepting
// connections.
//* Structure used for tracking abortive-disconnect requests.
typedef struct TCPAbortReq { CTEReqCmpltRtn tar_rtn; // Completion routine.
PVOID tar_context; // User context.
} TCPAbortReq;
#define MAX_CONN_PER_BLOCK 256
//* Structure of a ConnTable.
typedef struct TCPConnBlock { DEFINE_LOCK_STRUCTURE(cb_lock)#if DBG
uchar *module; uint line;#endif
uint cb_freecons; uint cb_nextfree; uint cb_blockid; uint cb_conninst; void *cb_conn[MAX_CONN_PER_BLOCK];} TCPConnBlock;
//* Structure of a TCB Connection. A TCP Connection points to a TCP and an
// address object.
typedef void (*ConnDoneRtn)(struct TCPConn *, CTELockHandle);
#define tc_signature 0x20204354 // 'TC '
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 connection.
void *tc_context; // User's context.
CTEReqCmpltRtn tc_rtn; // Completion routine.
void *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.
struct TCB *tc_LastTCB; TCPConnBlock *tc_ConnBlock; //Back pointer to the conn block
uint tc_connid;} TCPConn;
#define CONN_CLOSING 1 // Connection is closing.
#define CONN_DISACC 2 // Conn. is disassociating.
#define CONN_WINSET 4 // Window explictly set.
#define CONN_WINCFG 8 // Window read from configuration.
#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 0xffffffff
#define DEFAULT_CONN_BLOCKS 2;
typedef struct TCPAddrCheck { IPAddr SourceAddress; uint TickCount;} TCPAddrCheckElement;
extern TCPAddrCheckElement *AddrCheckTable;
//* 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 TDI_STATUS UDPConnect(PTDI_REQUEST Request, void *Timeout, PTDI_CONNECTION_INFORMATION RequestAddr, PTDI_CONNECTION_INFORMATION ReturnAddr);extern TDI_STATUS UDPDisconnect(PTDI_REQUEST Request, void *TO, PTDI_CONNECTION_INFORMATION DiscConnInfo, PTDI_CONNECTION_INFORMATION ReturnInfo);
extern void FreeConn(TCPConn *Conn);extern TCPConn *GetConn(void);extern struct TCPConnReq *GetConnReq(void);extern void FreeConnReq(struct TCPConnReq *FreedReq);extern void DerefTCB(struct TCB *DoneTCB, CTELockHandle Handle);extern void DerefSynTCB(struct SYNTCB *DoneTCB, CTELockHandle Handle);extern void InitRCE(struct TCB *NewTCB);extern void AcceptConn(struct TCB *AcceptTCB, BOOLEAN SYNSent, CTELockHandle Handle);extern void FreeConnID(TCPConn *Conn);extern void NotifyOfDisc(struct TCB *DiscTCB, struct IPOptInfo *DiscInfo, TDI_STATUS Status, CTELockHandle* Handle);extern TCPConn *GetConnFromConnID(uint ConnID, CTELockHandle *Handle);
extern void TryToCloseTCB(struct TCB *ClosedTCB, uchar Reason, CTELockHandle Handle);extern TDI_STATUS InitTCBFromConn(struct TCPConn *Conn, struct TCB *NewTCB, PTDI_CONNECTION_INFORMATION Addr, uint AOLocked);
extern void PushData(struct TCB *PushTCB, BOOLEAN PushAll);extern TDI_STATUS MapIPError(IP_STATUS IPError, TDI_STATUS Default);extern void GracefulClose(struct TCB *CloseTCB, uint ToTimeWait, uint Notify, CTELockHandle Handle);extern void RemoveTCBFromConn(struct TCB *RemovedTCB);extern void InitAddrChecks();extern int ConnCheckPassed(IPAddr Src, ulong Prt);extern void EnumerateConnectionList(uchar *Buffer, ulong BufferSize, ulong *EntriesReturned, ulong *EntriesAvailable);extern void ValidateMSS(TCB* MssTCB);extern void AdjustTCBFromRCE(TCB* RceTCB);
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