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/*
* Copyright (c) 2022 VMware, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __IP6FRAGMENT_H_
#define __IP6FRAGMENT_H_ 1
#include "PacketIO.h"
typedef struct _OVS_FRAGMENT6_LIST {
CHAR *pbuff;
UINT16 len; /* Fragment data length. */
UINT16 offset; /* Fragment data offset. */
struct _OVS_FRAGMENT6_LIST *next;
} OVS_FRAGMENT6_LIST, *POVS_FRAGMENT6_LIST;
typedef struct _OVS_IP6FRAG_KEY {
UINT8 protocol;
UINT8 pad_1[3]; /* Align the structure to address boundaries.*/
UINT32 id;
struct in6_addr sAddr;
struct in6_addr dAddr;
ovs_be64 tunnelId;
} OVS_IP6FRAG_KEY, *POVS_IP6FRAG_KEY;
typedef struct _OVS_IP6FRAG_ENTRY {
NDIS_SPIN_LOCK lockObj; /* To access the entry. */
BOOLEAN markedForDelete;
UINT8 numFragments;
UINT16 totalLen; /* The packet data total length(not
* include ipv6 header and opt header length) before
* fragment */
UINT16 recvdLen; /* Total data length packet contains has received */
UINT16 mru; /* Max receive unit(it's the whole ethernet frame
* packet length), it will be used in sent out before forward */
UINT64 expiration;
/* refer https://www.rfc-editor.org/rfc/rfc8200.html */
PCHAR beforeFragHdrBuf;/* ipv6 extension header buf before fragment field */
UINT16 beforeFragHdrLen;
UINT16 priorFragEleOffset;/* The last element before fragment field offset */
PCHAR fragHdrBuf;
UINT16 fragHdrLen;
PCHAR behindFragHdrBuf;/* ipv6 extension header buf behind fragment field */
UINT16 behindFragHdrLen;
OVS_IP6FRAG_KEY fragKey;
POVS_FRAGMENT6_LIST head;
POVS_FRAGMENT6_LIST tail;
LIST_ENTRY link;
} OVS_IP6FRAG_ENTRY, *POVS_IP6FRAG_ENTRY;
typedef struct _IP6_PktExtHeader_Meta {
UINT8 firstHdr;
UINT8 protocol;
UINT16 beforeFragExtHdrLen;
UINT16 fragExtHdrLen;
UINT16 behindFragExtHdrLen;
UINT16 extHdrTotalLen;
UINT16 dataPayloadLen;/* Ipv6 data length, not include extension header */
UINT16 fragOffset;
UINT16 priorFragEleOffset;
UINT16 flags;
UINT16 pktMru;
UINT32 ident;
PCHAR beforeFragElePtr;
IPv6ExtHdr *firstHdrPtr;
} IP6_PktExtHeader_Meta, *PIP6_PktExtHeader_Meta;
typedef struct _OVS_IP6FRAG_THREAD_CTX {
KEVENT event;
PVOID threadObject;
UINT32 exit;
} OVS_IP6FRAG_THREAD_CTX, *POVS_IP6FRAG_THREAD_CTX;
#define IP6_FRAG_HASH_TABLE_SIZE ((UINT32)1 << 10)
#define IP6_FRAG_HASH_TABLE_MASK (IP6_FRAG_HASH_TABLE_SIZE - 1)
#define IP6FRAG_ENTRY_TIMEOUT 300000000LL
#define IP6FRAG_CLEANUP_INTERVAL IP6FRAG_ENTRY_TIMEOUT * 2 /*1m.*/
NDIS_STATUS OvsProcessIpv6Fragment(POVS_SWITCH_CONTEXT switchContext,
PNET_BUFFER_LIST *curNbl,
OvsCompletionList *completionList,
NDIS_SWITCH_PORT_ID sourcePort,
POVS_PACKET_HDR_INFO layers,
ovs_be64 tunnelId, OvsFlowKey *key);
NDIS_STATUS OvsStorageIpv6ExtHeader(POVS_IP6FRAG_ENTRY entry,
UINT16 beforeFragHdrLen,
UINT16 fragHdrLen,
UINT16 behindFragHdrLen,
UINT16 priorFragEleOffset,
CHAR *pktBuf,
POVS_PACKET_HDR_INFO layers);
NDIS_STATUS OvsInitIp6Fragment(POVS_SWITCH_CONTEXT context);
VOID OvsCleanupIp6Fragment(VOID);
NDIS_STATUS OvsGetPacketMeta(PIP6_PktExtHeader_Meta pktMeta, EthHdr *eth,
OvsFlowKey *key, POVS_PACKET_HDR_INFO layers);
PCHAR OvsBuildNewIpv6Hdr(EthHdr *eth, POVS_IP6FRAG_ENTRY entry,
POVS_PACKET_HDR_INFO layers, UINT32 *pktLen);
#endif //_IP6FRAGMENT_H_
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