| /****************************************************************************** |
| * |
| * Name: skcsum.h |
| * Project: GEnesis - SysKonnect SK-NET Gigabit Ethernet (SK-98xx) |
| * Version: $Revision: 1.10 $ |
| * Date: $Date: 2003/08/20 13:59:57 $ |
| * 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. |
| * |
| ******************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 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 SK_CS_CALCULATE_CHECKSUM |
| extern unsigned SkCsCalculateChecksum( |
| void *pData, |
| unsigned Length); |
| #endif /* SK_CS_CALCULATE_CHECKSUM */ |
| |
| 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 SkCsSetReceiveFlags( |
| SK_AC *pAc, |
| unsigned ReceiveFlags, |
| unsigned *pChecksum1Offset, |
| unsigned *pChecksum2Offset, |
| int NetNumber); |
| |
| #endif /* __INC_SKCSUM_H */ |