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