80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
#ifndef H__netpkt
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#define H__netpkt
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#include "netbasic.h"
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/*
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N E T P K T
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NETPKT is the data structure sent across the variety of network
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interfaces.
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*/
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typedef struct {
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/* checksum of pkthdr. Set and checked in netintf only. */
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DWORD np_cksHeader;
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/* magic number of this connection ... unused at this time */
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DWORD np_magicNum;
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/* offset of this packet in a message. PKTZ level only. */
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DWORD np_pktOffsInMsg;
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/* size of overall message. PKTZ level only */
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DWORD np_msgSize;
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/* id of last packet received OK. PKTZ level only. Set when ready
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to xmt */
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PKTID np_lastPktOK;
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/* last packet received. PKTZ level only. Set when ready to xmt */
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PKTID np_lastPktRcvd;
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/* size of packet excluding header. If 0, this indicates control pkt and
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np_type should be NPKT_CONTROL. Only set/checked at pktz level */
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WORD np_pktSize;
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/* status of np_lastPktRcvd, one of:
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PS_NO_INFO
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PS_OK
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PS_DATA_ERR
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PS_MEMORY_ERR
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PKTZ level only ... set when ready to xmt
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*/
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BYTE np_lastPktStatus;
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/* either VERMETH_CRC16 or VERMETH_CKS32. This represents how the fields
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np_cksData and np_cksHeader are calculated. Only played with at
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netintf level */
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BYTE np_verifyMethod;
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/* either NPKT_ROUTER, NPKT_PKTZ or NPKT_CONTROL. Pktz level only */
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BYTE np_type;
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/* filler for byte-alignment problems */
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BYTE np_filler[3];
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/* packet ID of this packet. PKTZ level only */
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PKTID np_pktID;
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/* checksum of data portion of pkt. Only set and/or checked at
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netintf level */
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DWORD np_cksData;
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} NETPKT;
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typedef NETPKT FAR *LPNETPKT;
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/* packet status */
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#define PS_NO_INFO (1)
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#define PS_OK (2)
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#define PS_DATA_ERR (3)
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#define PS_MEMORY_ERR (4)
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#define PS_NO_RESPONSE (5)
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/* packet type */
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#define NPKT_ROUTER (1)
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#define NPKT_PKTZ (2)
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#define NPKT_CONTROL (3)
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#define NPKT_NETIF (4)
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#endif
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