datapath-windows/ovsext/Offload.h

   1 /*
   2  * Copyright (c) 2014, 2016 VMware, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef __OFFLOAD_H_
  18 #define __OFFLOAD_H_ 1
  19
  20 typedef union _OVS_PACKET_HDR_INFO *POVS_PACKET_HDR_INFO;
  21
  22 UINT16 CalculateChecksum(UINT8 *ptr, UINT16 length, UINT16 initial);
  23 UINT16 CopyAndCalculateChecksum(UINT8 *dst, UINT8 *src, UINT16 length,
  24                                 UINT16 initial);
  25 UINT16 IPChecksum(UINT8 *ipHdr, UINT16 length, UINT16 initial);
  26 UINT16 IPPseudoChecksum(UINT32 *src, UINT32 *dst, UINT8 protocol,
  27                         UINT16 totalLength);
  28 UINT16 IPv6PseudoChecksum(UINT32 *src, UINT32 *dst, UINT8 protocol,
  29                           UINT16 totalLength);
  30 UINT16 ChecksumUpdate32(UINT16 oldSum, UINT32 prev, UINT32 newValue);
  31 UINT16 ChecksumUpdate16(UINT16 oldSum, UINT16 prev, UINT16 newValue);
  32 UINT16 CalculateChecksumNB(const PNET_BUFFER nb, UINT16 csumDataLen,
  33                            UINT32 offset);
  34 NDIS_STATUS OvsValidateIPChecksum(PNET_BUFFER_LIST curNbl,
  35                                   POVS_PACKET_HDR_INFO hdrInfo);
  36 NDIS_STATUS OvsValidateUDPChecksum(PNET_BUFFER_LIST curNbl,
  37                                    BOOLEAN udpCsumZero);
  38 NDIS_STATUS OvsCalculateUDPChecksum(PNET_BUFFER_LIST curNbl,
  39                                     PNET_BUFFER curNb,
  40                                     IPHdr *ipHdr,
  41                                     UDPHdr *udpHdr,
  42                                     UINT32 packetLength,
  43                                     POVS_PACKET_HDR_INFO layers);
  44
  45 ULONG OVSGetTcpMSS(PNET_BUFFER_LIST nbl);
  46
  47 NDIS_STATUS OvsApplySWChecksumOnNB(POVS_PACKET_HDR_INFO layers,
  48                                    PNET_BUFFER_LIST nbl,
  49                                    PNDIS_TCP_IP_CHECKSUM_NET_BUFFER_LIST_INFO
  50                                                                      csumInfo);
  51
  52 #endif /* __OFFLOAD_H_ */