skcsum.h
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- /******************************************************************************
- *
- * Name: skcsum.h
- * Project: GEnesis - SysKonnect SK-NET Gigabit Ethernet (SK-98xx)
- * Version: $Revision: 1.9 $
- * Date: $Date: 2001/02/06 11:21:39 $
- * Purpose: Store/verify Internet checksum in send/receive packets.
- *
- ******************************************************************************/
- /******************************************************************************
- *
- * (C)Copyright 1998-2001 SysKonnect GmbH.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * The information in this file is provided "AS IS" without warranty.
- *
- ******************************************************************************/
- /******************************************************************************
- *
- * History:
- *
- * $Log: skcsum.h,v $
- * Revision 1.9 2001/02/06 11:21:39 rassmann
- * Editorial changes.
- *
- * Revision 1.8 2001/02/06 11:15:36 rassmann
- * Supporting two nets on dual-port adapters.
- *
- * Revision 1.7 2000/06/29 13:17:05 rassmann
- * Corrected reception of a packet with UDP checksum == 0 (which means there
- * is no UDP checksum).
- *
- * Revision 1.6 2000/02/28 12:33:44 cgoos
- * Changed C++ style comments to C style.
- *
- * Revision 1.5 2000/02/21 12:10:05 cgoos
- * Fixed license comment.
- *
- * Revision 1.4 2000/02/21 11:08:37 cgoos
- * Merged changes back into common source.
- *
- * Revision 1.1 1999/07/26 14:47:49 mkarl
- * changed from common source to windows specific source
- * added return SKCS_STATUS_IP_CSUM_ERROR_UDP and
- * SKCS_STATUS_IP_CSUM_ERROR_TCP to pass the NidsTester
- * changes for Tx csum offload
- *
- * Revision 1.2 1998/09/04 12:16:34 mhaveman
- * Checked in for Stephan to allow compilation.
- * -Added definition SK_CSUM_EVENT_CLEAR_PROTO_STATS to clear statistic
- * -Added prototype for SkCsEvent()
- *
- * Revision 1.1 1998/09/01 15:36:53 swolf
- * initial revision
- *
- * 01-Sep-1998 sw Created.
- *
- ******************************************************************************/
- /******************************************************************************
- *
- * Description:
- *
- * Public header file for the "GEnesis" common module "CSUM".
- *
- * "GEnesis" is an abbreviation of "Gigabit Ethernet Network System in Silicon"
- * and is the code name of this SysKonnect project.
- *
- * Compilation Options:
- *
- * SK_USE_CSUM - Define if CSUM is to be used. Otherwise, CSUM will be an
- * empty module.
- *
- * SKCS_OVERWRITE_PROTO - Define to overwrite the default protocol id
- * definitions. In this case, all SKCS_PROTO_xxx definitions must be made
- * external.
- *
- * SKCS_OVERWRITE_STATUS - Define to overwrite the default return status
- * definitions. In this case, all SKCS_STATUS_xxx definitions must be made
- * external.
- *
- * Include File Hierarchy:
- *
- * "h/skcsum.h"
- * "h/sktypes.h"
- * "h/skqueue.h"
- *
- ******************************************************************************/
- #ifndef __INC_SKCSUM_H
- #define __INC_SKCSUM_H
- #include "h/sktypes.h"
- #include "h/skqueue.h"
- /* defines ********************************************************************/
- /*
- * Define the default bit flags for 'SKCS_PACKET_INFO.ProtocolFlags' if no user
- * overwrite.
- */
- #ifndef SKCS_OVERWRITE_PROTO /* User overwrite? */
- #define SKCS_PROTO_IP 0x1 /* IP (Internet Protocol version 4) */
- #define SKCS_PROTO_TCP 0x2 /* TCP (Transmission Control Protocol) */
- #define SKCS_PROTO_UDP 0x4 /* UDP (User Datagram Protocol) */
- /* Indices for protocol statistics. */
- #define SKCS_PROTO_STATS_IP 0
- #define SKCS_PROTO_STATS_UDP 1
- #define SKCS_PROTO_STATS_TCP 2
- #define SKCS_NUM_PROTOCOLS 3 /* Number of supported protocols. */
- #endif /* !SKCS_OVERWRITE_PROTO */
- /*
- * Define the default SKCS_STATUS type and values if no user overwrite.
- *
- * SKCS_STATUS_UNKNOWN_IP_VERSION - Not an IP v4 frame.
- * SKCS_STATUS_IP_CSUM_ERROR - IP checksum error.
- * SKCS_STATUS_IP_CSUM_ERROR_TCP - IP checksum error in TCP frame.
- * SKCS_STATUS_IP_CSUM_ERROR_UDP - IP checksum error in UDP frame
- * SKCS_STATUS_IP_FRAGMENT - IP fragment (IP checksum ok).
- * SKCS_STATUS_IP_CSUM_OK - IP checksum ok (not a TCP or UDP frame).
- * SKCS_STATUS_TCP_CSUM_ERROR - TCP checksum error (IP checksum ok).
- * SKCS_STATUS_UDP_CSUM_ERROR - UDP checksum error (IP checksum ok).
- * SKCS_STATUS_TCP_CSUM_OK - IP and TCP checksum ok.
- * SKCS_STATUS_UDP_CSUM_OK - IP and UDP checksum ok.
- * SKCS_STATUS_IP_CSUM_OK_NO_UDP - IP checksum OK and no UDP checksum.
- */
- #ifndef SKCS_OVERWRITE_STATUS /* User overwrite? */
- #define SKCS_STATUS int /* Define status type. */
- #define SKCS_STATUS_UNKNOWN_IP_VERSION 1
- #define SKCS_STATUS_IP_CSUM_ERROR 2
- #define SKCS_STATUS_IP_FRAGMENT 3
- #define SKCS_STATUS_IP_CSUM_OK 4
- #define SKCS_STATUS_TCP_CSUM_ERROR 5
- #define SKCS_STATUS_UDP_CSUM_ERROR 6
- #define SKCS_STATUS_TCP_CSUM_OK 7
- #define SKCS_STATUS_UDP_CSUM_OK 8
- /* needed for Microsoft */
- #define SKCS_STATUS_IP_CSUM_ERROR_UDP 9
- #define SKCS_STATUS_IP_CSUM_ERROR_TCP 10
- /* UDP checksum may be omitted */
- #define SKCS_STATUS_IP_CSUM_OK_NO_UDP 11
- #endif /* !SKCS_OVERWRITE_STATUS */
- /* Clear protocol statistics event. */
- #define SK_CSUM_EVENT_CLEAR_PROTO_STATS 1
- /*
- * Add two values in one's complement.
- *
- * Note: One of the two input values may be "longer" than 16-bit, but then the
- * resulting sum may be 17 bits long. In this case, add zero to the result using
- * SKCS_OC_ADD() again.
- *
- * Result = Value1 + Value2
- */
- #define SKCS_OC_ADD(Result, Value1, Value2) {
- unsigned long Sum;
-
- Sum = (unsigned long) (Value1) + (unsigned long) (Value2);
- /* Add-in any carry. */
- (Result) = (Sum & 0xffff) + (Sum >> 16);
- }
- /*
- * Subtract two values in one's complement.
- *
- * Result = Value1 - Value2
- */
- #define SKCS_OC_SUB(Result, Value1, Value2)
- SKCS_OC_ADD((Result), (Value1), ~(Value2) & 0xffff)
- /* typedefs *******************************************************************/
- /*
- * SKCS_PROTO_STATS - The CSUM protocol statistics structure.
- *
- * There is one instance of this structure for each protocol supported.
- */
- typedef struct s_CsProtocolStatistics {
- SK_U64 RxOkCts; /* Receive checksum ok. */
- SK_U64 RxUnableCts; /* Unable to verify receive checksum. */
- SK_U64 RxErrCts; /* Receive checksum error. */
- SK_U64 TxOkCts; /* Transmit checksum ok. */
- SK_U64 TxUnableCts; /* Unable to calculate checksum in hw. */
- } SKCS_PROTO_STATS;
- /*
- * s_Csum - The CSUM module context structure.
- */
- typedef struct s_Csum {
- /* Enabled receive SK_PROTO_XXX bit flags. */
- unsigned ReceiveFlags[SK_MAX_NETS];
- #ifdef TX_CSUM
- unsigned TransmitFlags[SK_MAX_NETS];
- #endif /* TX_CSUM */
- /* The protocol statistics structure; one per supported protocol. */
- SKCS_PROTO_STATS ProtoStats[SK_MAX_NETS][SKCS_NUM_PROTOCOLS];
- } SK_CSUM;
- /*
- * SKCS_PACKET_INFO - The packet information structure.
- */
- typedef struct s_CsPacketInfo {
- /* Bit field specifiying the desired/found protocols. */
- unsigned ProtocolFlags;
- /* Length of complete IP header, including any option fields. */
- unsigned IpHeaderLength;
- /* IP header checksum. */
- unsigned IpHeaderChecksum;
- /* TCP/UDP pseudo header checksum. */
- unsigned PseudoHeaderChecksum;
- } SKCS_PACKET_INFO;
- /* function prototypes ********************************************************/
- #ifndef SkCsCalculateChecksum
- extern unsigned SkCsCalculateChecksum(
- void *pData,
- unsigned Length);
- #endif
- extern int SkCsEvent(
- SK_AC *pAc,
- SK_IOC Ioc,
- SK_U32 Event,
- SK_EVPARA Param);
- extern SKCS_STATUS SkCsGetReceiveInfo(
- SK_AC *pAc,
- void *pIpHeader,
- unsigned Checksum1,
- unsigned Checksum2,
- int NetNumber);
- extern void SkCsGetSendInfo(
- SK_AC *pAc,
- void *pIpHeader,
- SKCS_PACKET_INFO *pPacketInfo,
- int NetNumber);
- extern void SkCsSetReceiveFlags(
- SK_AC *pAc,
- unsigned ReceiveFlags,
- unsigned *pChecksum1Offset,
- unsigned *pChecksum2Offset,
- int NetNumber);
- #endif /* __INC_SKCSUM_H */