174 lines
8.7 KiB
C
174 lines
8.7 KiB
C
#ifndef H__pktz
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#define H__pktz
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#define NDDESignature 0x4E444445L
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/* states of packetizer */
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#define PKTZ_CONNECTED 1
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#define PKTZ_WAIT_PHYSICAL_CONNECT 2
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#define PKTZ_WAIT_NEG_CMD 3
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#define PKTZ_WAIT_NEG_RSP 4
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#define PKTZ_PAUSE_FOR_MEMORY 5
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#define PKTZ_CLOSE 6
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/* Timer IDs */
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#define TID_NO_RCV_CONN_CMD 1
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#define TID_NO_RCV_CONN_RSP 2
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#define TID_MEMORY_PAUSE 3
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#define TID_NO_RESPONSE 4
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#define TID_KEEPALIVE 5
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#define TID_XMT_STUCK 6
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#define TID_CLOSE_PKTZ 7
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/*
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PKTZ_NEG_CMD: negotiate pktsize, etc.
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*/
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typedef struct {
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WORD nc_type; /* PKTZ_NEG_CMD */
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WORD nc_pktSize; /* proposed size of packets */
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WORD nc_maxUnackPkts; /* proposed maximum unacknowledged packets */
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WORD nc_offsSrcNodeName; /* offset (from nc_strings[0]) of source node name */
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WORD nc_offsDstNodeName; /* offset (from nc_strings[0]) of destination node name */
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WORD nc_offsProtocols; /* offset (from nc_strings[0]) of start of protocol strings */
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WORD nc_protocolBytes; /* number of bytes of protocol strings */
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BYTE nc_strings[1]; /* start of NULL-terminated strings
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srcNodeName
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dstNodeName
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protocols
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*/
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} NEGCMD, FAR *LPNEGCMD;
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#define NEGRSP_ERRCLASS_NONE (0x0000)
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#define NEGRSP_ERRCLASS_NAME (0x0001)
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#define NEGRSP_ERRNAME_MISMATCH (0x0001)
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#define NEGRSP_ERRNAME_DUPLICATE (0x0002)
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#define NEGRSP_PROTOCOL_NONE (0xFFFF)
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typedef struct {
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WORD nr_type; /* one of PKTZ_NEG_CMD or PKTZ_NEG_RSP or PKTZ_KEEPALIVE */
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WORD nr_pktSize; /* size of packets agreed upon */
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WORD nr_maxUnackPkts; /* maximum unacknowledged packets agreed on */
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WORD nr_protocolIndex; /* protocol index. NEGRSP_PROTOCOL_NONE indicates error */
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WORD nr_errorClass; /* errors */
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WORD nr_errorNum;
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} NEGRSP, FAR *LPNEGRSP;
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typedef struct {
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WORD pc_type; /* PKTZ_NEG_... */
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} PKTZCMD;
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typedef PKTZCMD FAR *LPPKTZCMD;
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/* types of PKTZ messages */
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#define PKTZ_NEG_CMD (1)
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#define PKTZ_NEG_RSP (2)
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#define PKTZ_KEEPALIVE (3)
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/*
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N E T H D R
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NETHDR is the data in front of each network packet that the
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PKTZ uses to keep track of various information
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*/
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typedef struct nethdr {
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struct nethdr FAR *nh_prev; /* previous link */
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struct nethdr FAR *nh_next; /* next link */
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WORD nh_noRsp; /* count of consecutive no response errors */
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WORD nh_xmtErr; /* count of consecutive transmission errors */
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WORD nh_memErr; /* count of consecutive out-of-memory errors */
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WORD nh_filler; /* filler for byte-alignment problems */
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DWORD nh_timeSent; /* timestamp of when sent (in msec) */
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HTIMER nh_hTimerRspTO; /* hTimer for send response timeout */
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} NETHDR, FAR *LPNETHDR;
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/*
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PKTZ is the data associated with each instance of PKTZ
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*/
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typedef struct {
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CONNID pk_connId; /* connId: connection id for the associated network interface */
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WORD pk_state; /* PKTZ_... */
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BOOL pk_fControlPktNeeded; /* fControlPktNeeded: do we need to send a control packet */
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PKTID pk_pktidNextToSend; /* pktidNextToSend: pktId of the next packet that we should send. If we get a NACK regarding a packet, we should set pktidNextToSend to that pktid and retransmit it next chance we have */
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PKTID pk_pktidNextToBuild; /* pktidNextToBuild: pktId of the next packet that we build. */
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BYTE pk_lastPktStatus; /* lastPktStatus: status of last packet that we received from the other side. This gets put into the next packet that we send out (put in np_lastPktStatus field) */
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PKTID pk_lastPktRcvd; /* lastPktRcvd: last packet that we received. This gets put into np_lastPktRcvd on next pkt we xmit. */
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PKTID pk_lastPktOk; /* lastPktOk: last packet that we received OK. This gets put into np_lastPktOK on the next pkt we xmit. */
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PKTID pk_lastPktOkOther; /* lastPktOkOther: last packet that the other side has received OK. */
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PKTID pk_pktidNextToRecv; /* pktidNextToRecv: next packet number that we're expecting. We ignore any packets except this packet number */
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DWORD pk_pktOffsInXmtMsg; /* pktOffsInMsg: where we should start in the next DDE Packet to xmit. If this is non-zero, it means that part of the DDE Packet at the head of the DDE Packet list (pk_ddePktListHead) is in the unacked packet list */
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LPDDEPKT pk_lpDdePktSave; /* lpDdePktSave: if we are in the middle of a DDE packet, this is a pointer to the beginning of the packet */
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char pk_szDestName[ MAX_NODE_NAME+1 ];/* szDestName: name of destination node */
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char pk_szAliasName[ MAX_NODE_NAME+1 ]; /* szAliasName: alias of destination node, e.g. 15.8.0.244 w/ destName of sidloan */
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WORD pk_pktSize; /* pktSize: how big are the packets for this netintf */
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WORD pk_maxUnackPkts; /* maxUnackPkts: how many unacknowledged packets should we xmit? */
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DWORD pk_timeoutRcvNegCmd; /* configuration parameters for timeouts and retry limits */
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DWORD pk_timeoutRcvNegRsp;
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DWORD pk_timeoutMemoryPause;
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DWORD pk_timeoutKeepAlive;
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DWORD pk_timeoutXmtStuck;
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DWORD pk_timeoutSendRsp;
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WORD pk_wMaxNoResponse;
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WORD pk_wMaxXmtErr;
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WORD pk_wMaxMemErr;
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BOOL pk_fDisconnect; /* disconnect information */
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int pk_nDelay;
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LPNIPTRS pk_lpNiPtrs;/* lpNiPtrs: pointer to list of functions for associated netintf */
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/* statistics */
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DWORD pk_sent;
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DWORD pk_rcvd;
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HTIMER pk_hTimerKeepalive;
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HTIMER pk_hTimerXmtStuck; /* hTimerRcvNegCmd: timer for timeout waiting for client to send us the connect cmd */
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HTIMER pk_hTimerRcvNegCmd; /* hTimerRcvNegRsp: timer for timeout waiting for server to send us the connect cmd rsp */
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HTIMER pk_hTimerRcvNegRsp; /* hTimerMemoyrPause: timer for waiting before retransmitting a packet that was NACKed because of memory errors */
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HTIMER pk_hTimerMemoryPause;
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HTIMER pk_hTimerCloseConnection; /* rt_hTimerClose: timer for closing this route */
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/* list of saved packets that have been transmitted and are not acked. */
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LPNETHDR pk_pktUnackHead; /* Head is lowest numbered (least recent) packet */
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LPNETHDR pk_pktUnackTail; /* tail is highest numbered (most recent) packet */
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LPVOID pk_rcvBuf; /* receive buffer for getting info from netintf */
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LPNETPKT pk_controlPkt; /* buffer for control packet. Must always have memory available to send a control packet */
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LPNETHDR pk_pktFreeHead; /* list of packet buffers available for transmission */
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LPNETHDR pk_pktFreeTail;
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/* list of DDE packets that have yet to be xmitted */
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LPVOID pk_ddePktHead; /* earliest (least recent) */
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LPVOID pk_ddePktTail; /* latest (most recent) */
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LPVOID pk_prevPktz; /* list of packetizers in the system */
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LPVOID pk_nextPktz;
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LPVOID pk_prevPktzForNetintf; /* list of packetizers associated with this netintf */
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LPVOID pk_nextPktzForNetintf;
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HROUTER pk_hRouterHead; /* head of list of routers associated with PKTZ */
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WORD pk_hRouterExtraHead; /* extra info for list of hRouters */
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} PKTZ;
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typedef PKTZ FAR *LPPKTZ;
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VOID PktzSlice( void );
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BOOL PktzGetPktzForRouter( LPNIPTRS lpNiPtrs, LPSTR lpszNodeName,
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LPSTR lpszNodeInfo, HROUTER hRouter, WORD hRouterExtra,
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WORD FAR *lpwHopErr, BOOL bDisconnect, int nDelay,
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HPKTZ hPktzDisallowed );
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HPKTZ PktzNew( LPNIPTRS lpNiPtrs, BOOL bClient,
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LPSTR lpszNodeName, LPSTR lpszNodeInfo, CONNID connId,
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BOOL bDisconnect, int nDelay );
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VOID PktzAssociateRouter( HPKTZ hPktz, HROUTER hRouter,
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WORD hRouterExtra );
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VOID PktzDisassociateRouter( HPKTZ hPktz, HROUTER hRouter,
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WORD hRouterExtra );
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HPKTZ PktzGetNext( HPKTZ hPktz );
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HPKTZ PktzGetPrev( HPKTZ hPktz );
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VOID PktzSetNext( HPKTZ hPktz, HPKTZ hPktzNext );
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VOID PktzSetPrev( HPKTZ hPktz, HPKTZ hPktzPrev );
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VOID PktzLinkDdePktToXmit( HPKTZ hPktz, LPDDEPKT lpDdePkt );
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#ifdef _WINDOWS
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VOID PktzCloseAll( void );
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VOID PktzCloseByName( LPSTR lpszName );
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VOID PktzEnumConnections( HWND hDlg );
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#endif
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#endif
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