datapath-windows/ovsext/NetProto.h

   1 /*
   2  * Copyright (c) 2014 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 __NET_PROTO_H_
  18 #define __NET_PROTO_H_ 1
  19
  20 #include "precomp.h"
  21 #include "Ethernet.h"
  22
  23 #define ETH_ADDR_LENGTH    6
  24 /*
  25  * There is a more inclusive definition of ethernet header (Eth_Header) in
  26  * OvsEth.h that is used for packet parsing. For simple cases, , use the following definition.
  27  */
  28 typedef struct EthHdr {
  29     UINT8       Destination[ETH_ADDR_LENGTH];
  30     UINT8       Source[ETH_ADDR_LENGTH];
  31     UINT16      Type;
  32 } EthHdr, *PEthHdr;
  33
  34 #define IPV4                    4
  35 #define IPV6                    6
  36
  37 #define IP_HDR_MIN_LENGTH      20
  38 #define TCP_HDR_MIN_LENGTH     20
  39 #define TCP_CSUM_OFFSET        16
  40 #define UDP_CSUM_OFFSET        6
  41 #define ICMP_CSUM_OFFSET       2
  42 #define INET_CSUM_LENGTH       (sizeof(UINT16))
  43
  44 #define IP4_UNITS_TO_BYTES(x) ((x) << 2)
  45 #define IP4_BYTES_TO_UNITS(x) ((x) >> 2)
  46
  47 // length unit for ip->ihl, tcp->doff
  48 typedef UINT32 IP4UnitLength;
  49
  50 #define IP4_LENGTH_UNIT               (sizeof(IP4UnitLength))
  51 #define IP4_HDR_MIN_LENGTH_IN_UNITS   (IP_HDR_MIN_LENGTH / IP4_LENGTH_UNIT)
  52 #define TCP_HDR_MIN_LENGTH_IN_UNITS   (TCP_HDR_MIN_LENGTH / IP4_LENGTH_UNIT)
  53
  54 #define IP4_IHL_NO_OPTIONS            IP4_HDR_MIN_LENGTH_IN_UNITS
  55 #define IP4_HDR_LEN(iph)              IP4_UNITS_TO_BYTES((iph)->ihl)
  56
  57 // length unit for ip->frag_off
  58 typedef UINT64 IP4FragUnitLength;
  59
  60 #define IP4_FRAG_UNIT_LENGTH          (sizeof(IP4FragUnitLength))
  61
  62 // length UINT for ipv6 header length.
  63 typedef UINT64 IP6UnitLength;
  64
  65 #define TCP_HDR_LEN(tcph)             IP4_UNITS_TO_BYTES((tcph)->doff)
  66 #define TCP_DATA_LENGTH(iph, tcph)    (ntohs(iph->tot_len) -                \
  67                                        IP4_HDR_LEN(iph) - TCP_HDR_LEN(tcph))
  68
  69 #define TCP_DATA_OFFSET_NO_OPTIONS    TCP_HDR_MIN_LENGTH_IN_UNITS
  70 #define TCP_DATA_OFFSET_WITH_TIMESTAMP 8
  71
  72 /*
  73  * This is the maximum value for the length field in the IP header. The meaning
  74  * varies with IP protocols:
  75  *    IPv4: the total ip length (including ip header and extention)
  76  *    IPv6: the IP payload length (including IP extensions)
  77  */
  78 #define IP_MAX_PACKET          0xFFFF
  79
  80 #define IPPROTO_ICMP    1
  81 #define IPPROTO_IGMP    2
  82 #define IPPROTO_UDP     17
  83 #define IPPROTO_GRE     47
  84 #define IPPROTO_TCP     6
  85 #define IPPROTO_RSVD    0xff
  86
  87 #define IPPROTO_HOPOPTS         0               /* Hop-by-hop option header */
  88 #define IPPROTO_IPV6            41              /* IPv6 in IPv6 */
  89 #define IPPROTO_ROUTING         43              /* Routing header */
  90 #define IPPROTO_FRAGMENT        44              /* Fragmentation/reassembly header */
  91 #define IPPROTO_GRE             47              /* General Routing Encapsulation */
  92 #define IPPROTO_ESP             50              /* Encap. Security Payload */
  93 #define IPPROTO_AH              51              /* Authentication header */
  94 #define IPPROTO_ICMPV6          58              /* ICMP for IPv6 */
  95 #define IPPROTO_NONE            59              /* No next header */
  96 #define IPPROTO_DSTOPTS         60              /* Destination options header */
  97 #define IPPROTO_ETHERIP         97              /* etherIp tunneled protocol */
  98
  99 /* ICMPv6 types. */
 100 #define ND_NEIGHBOR_SOLICIT 135     /* neighbor solicitation */
 101 #define ND_NEIGHBOR_ADVERT  136     /* neighbor advertisment */
 102
 103 /* IPv6 Neighbor discovery option header. */
 104 #define ND_OPT_SOURCE_LINKADDR  1
 105 #define ND_OPT_TARGET_LINKADDR  2
 106
 107 /* Collides with MS definition (opposite order) */
 108 #define IP6F_OFF_HOST_ORDER_MASK 0xfff8
 109
 110 #define ARPOP_REQUEST   1       /* ARP request.  */
 111 #define ARPOP_REPLY     2       /* ARP reply.    */
 112 #define RARPOP_REQUEST  3       /* RARP request. */
 113 #define RARPOP_REPLY    4       /* RARP reply.   */
 114
 115                                         /* all ARP NBO's assume short ar_op */
 116 #define ARPOP_REQUEST_NBO  0x0100       /* NBO ARP request.   */
 117 #define ARPOP_REPLY_NBO    0x0200       /* NBO ARP reply.     */
 118 #define RARPOP_REQUEST_NBO 0x0300       /* NBO RARP request.  */
 119 #define RARPOP_REPLY_NBO   0x0300       /* NBO RARP reply.    */
 120
 121 #define ICMP_ECHO          8    /* Echo Request */
 122 #define ICMP_ECHOREPLY     0    /* Echo Reply */
 123 #define ICMP_DEST_UNREACH  3    /* Destination Unreachable */
 124
 125 /* IGMP related constants */
 126 #define IGMP_UNKNOWN    0x00    /* For IGMP packets where we don't know the type */
 127                                 /* Eg: Fragmented packets without the header */
 128
 129 /* Constants from RFC 3376 */
 130 #define IGMP_QUERY      0x11    /* IGMP Host Membership Query.    */
 131 #define IGMP_V1REPORT   0x12    /* IGMPv1 Host Membership Report. */
 132 #define IGMP_V2REPORT   0x16    /* IGMPv2 Host Membership Report. */
 133 #define IGMP_V3REPORT   0x22    /* IGMPv3 Host Membership Report. */
 134 #define IGMP_V2LEAVE    0x17    /* IGMPv2 Leave.                  */
 135
 136 /* Constants from RFC 2710  and RFC 3810 */
 137 #define MLD_QUERY       0x82    /* Multicast Listener Query.      */
 138 #define MLD_V1REPORT    0x83    /* Multicast Listener V1 Report.  */
 139 #define MLD_V2REPORT    0x8F    /* Multicast Listener V2 Report.  */
 140 #define MLD_DONE        0x84    /* Multicast Listener Done.       */
 141
 142 /* IPv4 offset flags */
 143 #define IP_CE           0x8000          /* Flag: "Congestion"           */
 144 #define IP_DF           0x4000          /* Flag: "Don't Fragment"       */
 145 #define IP_MF           0x2000          /* Flag: "More Fragments"       */
 146 #define IP_OFFSET       0x1FFF          /* "Fragment Offset" part       */
 147
 148 #define IP_OFFSET_NBO   0xFF1F          /* "Fragment Offset" part, NBO   */
 149 #define IP_DF_NBO       0x0040          /* NBO version of don't fragment */
 150 #define IP_MF_NBO       0x0020          /* NBO version of more fragments */
 151
 152 #define IPOPT_RTRALT    0x94
 153
 154 /* IP Explicit Congestion Notification bits (TOS field) */
 155 #define IP_ECN_NOT_ECT 0
 156 #define IP_ECN_ECT_1   1
 157 #define IP_ECN_ECT_0   2
 158 #define IP_ECN_CE      3
 159 #define IP_ECN_MASK    3
 160
 161 /* TCP options */
 162 #define TCP_OPT_NOP              1       /* Padding */
 163 #define TCP_OPT_EOL              0       /* End of options */
 164 #define TCP_OPT_MSS              2       /* Segment size negotiating */
 165 #define TCP_OPT_WINDOW           3       /* Window scaling */
 166 #define TCP_OPT_SACK_PERM        4       /* SACK Permitted */
 167 #define TCP_OPT_SACK             5       /* SACK Block */
 168 #define TCP_OPT_TIMESTAMP        8       /* Better RTT estimations/PAWS */
 169 #define TCP_OPT_MD5SIG           19      /* MD5 Signature (RFC2385) */
 170
 171 #define TCP_OPT_LEN_MSS          4
 172 #define TCP_OPT_LEN_WINDOW       3
 173 #define TCP_OPT_LEN_SACK_PERM    2
 174 #define TCP_OPT_LEN_TIMESTAMP    10
 175 #define TCP_OPT_LEN_MD5SIG       18
 176
 177 #define SOCKET_IPPROTO_HOPOPTS IPPROTO_HOPOPTS
 178 #define SOCKET_IPPROTO_ROUTING IPPROTO_ROUTING
 179 #define SOCKET_IPPROTO_FRAGMENT IPPROTO_FRAGMENT
 180 #define SOCKET_IPPROTO_AH IPPROTO_AH
 181 #define SOCKET_IPPROTO_ICMPV6 IPPROTO_ICMPV6
 182 #define SOCKET_IPPROTO_NONE IPPROTO_NONE
 183 #define SOCKET_IPPROTO_DSTOPTS IPPROTO_DSTOPTS
 184 #define SOCKET_IPPROTO_EON  80
 185 #define SOCKET_IPPROTO_ETHERIP IPPROTO_ETHERIP
 186 #define SOCKET_IPPROTO_ENCAP 98
 187 #define SOCKET_IPPROTO_PIM 103
 188 #define SOCKET_IPPROTO_IPCOMP 108
 189 #define SOCKET_IPPROTO_CARP 112
 190 #define SOCKET_IPPROTO_PFSYNC 240
 191 #define SOCKET_IPPROTO_RAW IPPROTO_RSVD
 192
 193 typedef union _OVS_PACKET_HDR_INFO {
 194     struct {
 195         UINT16 l3Offset;
 196         UINT16 l4Offset;
 197         union {
 198             UINT16 l7Offset;
 199             UINT16 l4PayLoad;
 200         };
 201         UINT16 isIPv4:1;
 202         UINT16 isIPv6:1;
 203         UINT16 isTcp:1;
 204         UINT16 isUdp:1;
 205         UINT16 tcpCsumNeeded:1;
 206         UINT16 udpCsumNeeded:1;
 207         UINT16 udpCsumZero:1;
 208         UINT16 pad:9;
 209     } ;
 210     UINT64 value;
 211 } OVS_PACKET_HDR_INFO, *POVS_PACKET_HDR_INFO;
 212
 213 typedef struct IPHdr {
 214    UINT8    ihl:4,
 215             version:4;
 216    UINT8    tos;
 217    UINT16   tot_len;
 218    UINT16   id;
 219    UINT16   frag_off;
 220    UINT8    ttl;
 221    UINT8    protocol;
 222    UINT16   check;
 223    UINT32   saddr;
 224    UINT32   daddr;
 225 } IPHdr;
 226
 227
 228  /*
 229  * IPv6 fixed header
 230  *
 231  * BEWARE, it is incorrect. The first 4 bits of flow_lbl
 232  * are glued to priority now, forming "class".
 233  */
 234
 235 typedef struct IPv6Hdr {
 236     UINT8    priority:4,
 237              version:4;
 238     UINT8    flow_lbl[3];
 239
 240     UINT16   payload_len;
 241     UINT8    nexthdr;
 242     UINT8    hop_limit;
 243
 244     struct in6_addr saddr;
 245     struct in6_addr daddr;
 246 } IPv6Hdr;
 247
 248 // Generic IPv6 extension header
 249 typedef struct IPv6ExtHdr {
 250     UINT8        nextHeader; // type of the next header
 251     UINT8        hdrExtLen;  // length of header extensions (beyond 8 bytes)
 252     UINT16       optPad1;
 253     UINT32       optPad2;
 254 } IPv6ExtHdr;
 255
 256 typedef struct IPv6FragHdr {
 257     UINT8 nextHeader;
 258     UINT8 reserved;
 259     UINT16 offlg;
 260     UINT32 ident;
 261 } IPv6FragHdr;
 262
 263 typedef struct IPv6NdOptHdr {
 264     UINT8 type;
 265     UINT8 len;
 266 } IPv6NdOptHdr;
 267
 268 typedef struct ICMPHdr {
 269    UINT8    type;
 270    UINT8    code;
 271    UINT16   checksum;
 272 } ICMPHdr;
 273
 274 typedef struct ICMPEcho {
 275    UINT16       id;
 276    UINT16       seq;
 277 } ICMPEcho;
 278
 279 typedef struct UDPHdr {
 280    UINT16    source;
 281    UINT16    dest;
 282    UINT16    len;
 283    UINT16    check;
 284 } UDPHdr;
 285
 286 typedef struct TCPHdr {
 287    UINT16    source;
 288    UINT16    dest;
 289    UINT32    seq;
 290    UINT32    ack_seq;
 291    UINT16    res1:4,
 292              doff:4,
 293              fin:1,
 294              syn:1,
 295              rst:1,
 296              psh:1,
 297              ack:1,
 298              urg:1,
 299              ece:1,
 300              cwr:1;
 301    UINT16    window;
 302    UINT16    check;
 303    UINT16    urg_ptr;
 304 } TCPHdr;
 305
 306 typedef struct PseudoHdr {
 307    UINT32   sourceIPAddr;
 308    UINT32   destIPAddr;
 309    UINT8    zero;
 310    UINT8    protocol;
 311    UINT16   length;
 312 } PseudoHdr;
 313
 314 typedef struct PseudoHdrIPv6 {
 315    UINT8    sourceIPAddr[16];
 316    UINT8    destIPAddr[16];
 317    UINT8    zero;
 318    UINT8    protocol;
 319    UINT16   length;
 320 } PseudoHdrIPv6;
 321
 322
 323 struct ArpHdr {
 324    UINT16   ar_hrd;                /* Format of hardware address.  */
 325    UINT16   ar_pro;                /* Format of protocol address.  */
 326    UINT8    ar_hln;                /* Length of hardware address.  */
 327    UINT8    ar_pln;                /* Length of protocol address.  */
 328    UINT16   ar_op;                 /* ARP opcode (command).  */
 329 };
 330
 331 typedef struct EtherArp {
 332    struct ArpHdr ea_hdr;          /* fixed-size header */
 333    Eth_Address   arp_sha;         /* sender hardware address */
 334    UINT8         arp_spa[4];      /* sender protocol address */
 335    Eth_Address   arp_tha;         /* target hardware address */
 336    UINT8         arp_tpa[4];      /* target protocol address */
 337 } EtherArp;
 338
 339 typedef struct IGMPHdr {
 340    UINT8    type;
 341    UINT8    maxResponseTime;
 342    UINT16   csum;
 343    UINT8    groupAddr[4];
 344 } IGMPHdr;
 345
 346 typedef struct IGMPV3Trailer {
 347    UINT8  qrv:3,
 348             s:1,
 349          resv:4;
 350    UINT8 qqic;
 351    UINT16 numSources;
 352 } IGMPV3Trailer;
 353
 354 typedef struct IPOpt {
 355    UINT8 type;
 356    UINT8 length;
 357    UINT16 value;
 358 } IPOpt;
 359
 360 /*
 361  * IP protocol types
 362  */
 363 #define SOCKET_IPPROTO_IP    0
 364 #define SOCKET_IPPROTO_ICMP  1
 365 #define SOCKET_IPPROTO_TCP   6
 366 #define SOCKET_IPPROTO_UDP   17
 367 #define SOCKET_IPPROTO_GRE   47
 368
 369 #endif /* __NET_PROTO_H_ */