app/test-pmd/cmdline_flow.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2016 6WIND S.A.
   3  * Copyright 2016 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <stddef.h>
   7 #include <stdint.h>
   8 #include <stdio.h>
   9 #include <inttypes.h>
  10 #include <errno.h>
  11 #include <ctype.h>
  12 #include <string.h>
  13 #include <arpa/inet.h>
  14 #include <sys/socket.h>
  15
  16 #include <rte_common.h>
  17 #include <rte_ethdev.h>
  18 #include <rte_byteorder.h>
  19 #include <cmdline_parse.h>
  20 #include <cmdline_parse_etheraddr.h>
  21 #include <rte_flow.h>
  22
  23 #include "testpmd.h"
  24
  25 /** Parser token indices. */
  26 enum index {
  27         /* Special tokens. */
  28         ZERO = 0,
  29         END,
  30
  31         /* Common tokens. */
  32         INTEGER,
  33         UNSIGNED,
  34         PREFIX,
  35         BOOLEAN,
  36         STRING,
  37         MAC_ADDR,
  38         IPV4_ADDR,
  39         IPV6_ADDR,
  40         RULE_ID,
  41         PORT_ID,
  42         GROUP_ID,
  43         PRIORITY_LEVEL,
  44
  45         /* Top-level command. */
  46         FLOW,
  47
  48         /* Sub-level commands. */
  49         VALIDATE,
  50         CREATE,
  51         DESTROY,
  52         FLUSH,
  53         QUERY,
  54         LIST,
  55         ISOLATE,
  56
  57         /* Destroy arguments. */
  58         DESTROY_RULE,
  59
  60         /* Query arguments. */
  61         QUERY_ACTION,
  62
  63         /* List arguments. */
  64         LIST_GROUP,
  65
  66         /* Validate/create arguments. */
  67         GROUP,
  68         PRIORITY,
  69         INGRESS,
  70         EGRESS,
  71
  72         /* Validate/create pattern. */
  73         PATTERN,
  74         ITEM_PARAM_IS,
  75         ITEM_PARAM_SPEC,
  76         ITEM_PARAM_LAST,
  77         ITEM_PARAM_MASK,
  78         ITEM_PARAM_PREFIX,
  79         ITEM_NEXT,
  80         ITEM_END,
  81         ITEM_VOID,
  82         ITEM_INVERT,
  83         ITEM_ANY,
  84         ITEM_ANY_NUM,
  85         ITEM_PF,
  86         ITEM_VF,
  87         ITEM_VF_ID,
  88         ITEM_PORT,
  89         ITEM_PORT_INDEX,
  90         ITEM_RAW,
  91         ITEM_RAW_RELATIVE,
  92         ITEM_RAW_SEARCH,
  93         ITEM_RAW_OFFSET,
  94         ITEM_RAW_LIMIT,
  95         ITEM_RAW_PATTERN,
  96         ITEM_ETH,
  97         ITEM_ETH_DST,
  98         ITEM_ETH_SRC,
  99         ITEM_ETH_TYPE,
 100         ITEM_VLAN,
 101         ITEM_VLAN_TPID,
 102         ITEM_VLAN_TCI,
 103         ITEM_VLAN_PCP,
 104         ITEM_VLAN_DEI,
 105         ITEM_VLAN_VID,
 106         ITEM_IPV4,
 107         ITEM_IPV4_TOS,
 108         ITEM_IPV4_TTL,
 109         ITEM_IPV4_PROTO,
 110         ITEM_IPV4_SRC,
 111         ITEM_IPV4_DST,
 112         ITEM_IPV6,
 113         ITEM_IPV6_TC,
 114         ITEM_IPV6_FLOW,
 115         ITEM_IPV6_PROTO,
 116         ITEM_IPV6_HOP,
 117         ITEM_IPV6_SRC,
 118         ITEM_IPV6_DST,
 119         ITEM_ICMP,
 120         ITEM_ICMP_TYPE,
 121         ITEM_ICMP_CODE,
 122         ITEM_UDP,
 123         ITEM_UDP_SRC,
 124         ITEM_UDP_DST,
 125         ITEM_TCP,
 126         ITEM_TCP_SRC,
 127         ITEM_TCP_DST,
 128         ITEM_TCP_FLAGS,
 129         ITEM_SCTP,
 130         ITEM_SCTP_SRC,
 131         ITEM_SCTP_DST,
 132         ITEM_SCTP_TAG,
 133         ITEM_SCTP_CKSUM,
 134         ITEM_VXLAN,
 135         ITEM_VXLAN_VNI,
 136         ITEM_E_TAG,
 137         ITEM_E_TAG_GRP_ECID_B,
 138         ITEM_NVGRE,
 139         ITEM_NVGRE_TNI,
 140         ITEM_MPLS,
 141         ITEM_MPLS_LABEL,
 142         ITEM_GRE,
 143         ITEM_GRE_PROTO,
 144         ITEM_FUZZY,
 145         ITEM_FUZZY_THRESH,
 146         ITEM_GTP,
 147         ITEM_GTP_TEID,
 148         ITEM_GTPC,
 149         ITEM_GTPU,
 150         ITEM_GENEVE,
 151         ITEM_GENEVE_VNI,
 152         ITEM_GENEVE_PROTO,
 153
 154         /* Validate/create actions. */
 155         ACTIONS,
 156         ACTION_NEXT,
 157         ACTION_END,
 158         ACTION_VOID,
 159         ACTION_PASSTHRU,
 160         ACTION_MARK,
 161         ACTION_MARK_ID,
 162         ACTION_FLAG,
 163         ACTION_QUEUE,
 164         ACTION_QUEUE_INDEX,
 165         ACTION_DROP,
 166         ACTION_COUNT,
 167         ACTION_DUP,
 168         ACTION_DUP_INDEX,
 169         ACTION_RSS,
 170         ACTION_RSS_QUEUES,
 171         ACTION_RSS_QUEUE,
 172         ACTION_PF,
 173         ACTION_VF,
 174         ACTION_VF_ORIGINAL,
 175         ACTION_VF_ID,
 176         ACTION_METER,
 177         ACTION_METER_ID,
 178 };
 179
 180 /** Size of pattern[] field in struct rte_flow_item_raw. */
 181 #define ITEM_RAW_PATTERN_SIZE 36
 182
 183 /** Storage size for struct rte_flow_item_raw including pattern. */
 184 #define ITEM_RAW_SIZE \
 185         (offsetof(struct rte_flow_item_raw, pattern) + ITEM_RAW_PATTERN_SIZE)
 186
 187 /** Number of queue[] entries in struct rte_flow_action_rss. */
 188 #define ACTION_RSS_NUM 32
 189
 190 /** Storage size for struct rte_flow_action_rss including queues. */
 191 #define ACTION_RSS_SIZE \
 192         (offsetof(struct rte_flow_action_rss, queue) + \
 193          sizeof(*((struct rte_flow_action_rss *)0)->queue) * ACTION_RSS_NUM)
 194
 195 /** Maximum number of subsequent tokens and arguments on the stack. */
 196 #define CTX_STACK_SIZE 16
 197
 198 /** Parser context. */
 199 struct context {
 200         /** Stack of subsequent token lists to process. */
 201         const enum index *next[CTX_STACK_SIZE];
 202         /** Arguments for stacked tokens. */
 203         const void *args[CTX_STACK_SIZE];
 204         enum index curr; /**< Current token index. */
 205         enum index prev; /**< Index of the last token seen. */
 206         int next_num; /**< Number of entries in next[]. */
 207         int args_num; /**< Number of entries in args[]. */
 208         uint32_t eol:1; /**< EOL has been detected. */
 209         uint32_t last:1; /**< No more arguments. */
 210         portid_t port; /**< Current port ID (for completions). */
 211         uint32_t objdata; /**< Object-specific data. */
 212         void *object; /**< Address of current object for relative offsets. */
 213         void *objmask; /**< Object a full mask must be written to. */
 214 };
 215
 216 /** Token argument. */
 217 struct arg {
 218         uint32_t hton:1; /**< Use network byte ordering. */
 219         uint32_t sign:1; /**< Value is signed. */
 220         uint32_t offset; /**< Relative offset from ctx->object. */
 221         uint32_t size; /**< Field size. */
 222         const uint8_t *mask; /**< Bit-mask to use instead of offset/size. */
 223 };
 224
 225 /** Parser token definition. */
 226 struct token {
 227         /** Type displayed during completion (defaults to "TOKEN"). */
 228         const char *type;
 229         /** Help displayed during completion (defaults to token name). */
 230         const char *help;
 231         /** Private data used by parser functions. */
 232         const void *priv;
 233         /**
 234          * Lists of subsequent tokens to push on the stack. Each call to the
 235          * parser consumes the last entry of that stack.
 236          */
 237         const enum index *const *next;
 238         /** Arguments stack for subsequent tokens that need them. */
 239         const struct arg *const *args;
 240         /**
 241          * Token-processing callback, returns -1 in case of error, the
 242          * length of the matched string otherwise. If NULL, attempts to
 243          * match the token name.
 244          *
 245          * If buf is not NULL, the result should be stored in it according
 246          * to context. An error is returned if not large enough.
 247          */
 248         int (*call)(struct context *ctx, const struct token *token,
 249                     const char *str, unsigned int len,
 250                     void *buf, unsigned int size);
 251         /**
 252          * Callback that provides possible values for this token, used for
 253          * completion. Returns -1 in case of error, the number of possible
 254          * values otherwise. If NULL, the token name is used.
 255          *
 256          * If buf is not NULL, entry index ent is written to buf and the
 257          * full length of the entry is returned (same behavior as
 258          * snprintf()).
 259          */
 260         int (*comp)(struct context *ctx, const struct token *token,
 261                     unsigned int ent, char *buf, unsigned int size);
 262         /** Mandatory token name, no default value. */
 263         const char *name;
 264 };
 265
 266 /** Static initializer for the next field. */
 267 #define NEXT(...) (const enum index *const []){ __VA_ARGS__, NULL, }
 268
 269 /** Static initializer for a NEXT() entry. */
 270 #define NEXT_ENTRY(...) (const enum index []){ __VA_ARGS__, ZERO, }
 271
 272 /** Static initializer for the args field. */
 273 #define ARGS(...) (const struct arg *const []){ __VA_ARGS__, NULL, }
 274
 275 /** Static initializer for ARGS() to target a field. */
 276 #define ARGS_ENTRY(s, f) \
 277         (&(const struct arg){ \
 278                 .offset = offsetof(s, f), \
 279                 .size = sizeof(((s *)0)->f), \
 280         })
 281
 282 /** Static initializer for ARGS() to target a bit-field. */
 283 #define ARGS_ENTRY_BF(s, f, b) \
 284         (&(const struct arg){ \
 285                 .size = sizeof(s), \
 286                 .mask = (const void *)&(const s){ .f = (1 << (b)) - 1 }, \
 287         })
 288
 289 /** Static initializer for ARGS() to target an arbitrary bit-mask. */
 290 #define ARGS_ENTRY_MASK(s, f, m) \
 291         (&(const struct arg){ \
 292                 .offset = offsetof(s, f), \
 293                 .size = sizeof(((s *)0)->f), \
 294                 .mask = (const void *)(m), \
 295         })
 296
 297 /** Same as ARGS_ENTRY_MASK() using network byte ordering for the value. */
 298 #define ARGS_ENTRY_MASK_HTON(s, f, m) \
 299         (&(const struct arg){ \
 300                 .hton = 1, \
 301                 .offset = offsetof(s, f), \
 302                 .size = sizeof(((s *)0)->f), \
 303                 .mask = (const void *)(m), \
 304         })
 305
 306 /** Static initializer for ARGS() to target a pointer. */
 307 #define ARGS_ENTRY_PTR(s, f) \
 308         (&(const struct arg){ \
 309                 .size = sizeof(*((s *)0)->f), \
 310         })
 311
 312 /** Static initializer for ARGS() with arbitrary size. */
 313 #define ARGS_ENTRY_USZ(s, f, sz) \
 314         (&(const struct arg){ \
 315                 .offset = offsetof(s, f), \
 316                 .size = (sz), \
 317         })
 318
 319 /** Same as ARGS_ENTRY() using network byte ordering. */
 320 #define ARGS_ENTRY_HTON(s, f) \
 321         (&(const struct arg){ \
 322                 .hton = 1, \
 323                 .offset = offsetof(s, f), \
 324                 .size = sizeof(((s *)0)->f), \
 325         })
 326
 327 /** Parser output buffer layout expected by cmd_flow_parsed(). */
 328 struct buffer {
 329         enum index command; /**< Flow command. */
 330         portid_t port; /**< Affected port ID. */
 331         union {
 332                 struct {
 333                         struct rte_flow_attr attr;
 334                         struct rte_flow_item *pattern;
 335                         struct rte_flow_action *actions;
 336                         uint32_t pattern_n;
 337                         uint32_t actions_n;
 338                         uint8_t *data;
 339                 } vc; /**< Validate/create arguments. */
 340                 struct {
 341                         uint32_t *rule;
 342                         uint32_t rule_n;
 343                 } destroy; /**< Destroy arguments. */
 344                 struct {
 345                         uint32_t rule;
 346                         enum rte_flow_action_type action;
 347                 } query; /**< Query arguments. */
 348                 struct {
 349                         uint32_t *group;
 350                         uint32_t group_n;
 351                 } list; /**< List arguments. */
 352                 struct {
 353                         int set;
 354                 } isolate; /**< Isolated mode arguments. */
 355         } args; /**< Command arguments. */
 356 };
 357
 358 /** Private data for pattern items. */
 359 struct parse_item_priv {
 360         enum rte_flow_item_type type; /**< Item type. */
 361         uint32_t size; /**< Size of item specification structure. */
 362 };
 363
 364 #define PRIV_ITEM(t, s) \
 365         (&(const struct parse_item_priv){ \
 366                 .type = RTE_FLOW_ITEM_TYPE_ ## t, \
 367                 .size = s, \
 368         })
 369
 370 /** Private data for actions. */
 371 struct parse_action_priv {
 372         enum rte_flow_action_type type; /**< Action type. */
 373         uint32_t size; /**< Size of action configuration structure. */
 374 };
 375
 376 #define PRIV_ACTION(t, s) \
 377         (&(const struct parse_action_priv){ \
 378                 .type = RTE_FLOW_ACTION_TYPE_ ## t, \
 379                 .size = s, \
 380         })
 381
 382 static const enum index next_vc_attr[] = {
 383         GROUP,
 384         PRIORITY,
 385         INGRESS,
 386         EGRESS,
 387         PATTERN,
 388         ZERO,
 389 };
 390
 391 static const enum index next_destroy_attr[] = {
 392         DESTROY_RULE,
 393         END,
 394         ZERO,
 395 };
 396
 397 static const enum index next_list_attr[] = {
 398         LIST_GROUP,
 399         END,
 400         ZERO,
 401 };
 402
 403 static const enum index item_param[] = {
 404         ITEM_PARAM_IS,
 405         ITEM_PARAM_SPEC,
 406         ITEM_PARAM_LAST,
 407         ITEM_PARAM_MASK,
 408         ITEM_PARAM_PREFIX,
 409         ZERO,
 410 };
 411
 412 static const enum index next_item[] = {
 413         ITEM_END,
 414         ITEM_VOID,
 415         ITEM_INVERT,
 416         ITEM_ANY,
 417         ITEM_PF,
 418         ITEM_VF,
 419         ITEM_PORT,
 420         ITEM_RAW,
 421         ITEM_ETH,
 422         ITEM_VLAN,
 423         ITEM_IPV4,
 424         ITEM_IPV6,
 425         ITEM_ICMP,
 426         ITEM_UDP,
 427         ITEM_TCP,
 428         ITEM_SCTP,
 429         ITEM_VXLAN,
 430         ITEM_E_TAG,
 431         ITEM_NVGRE,
 432         ITEM_MPLS,
 433         ITEM_GRE,
 434         ITEM_FUZZY,
 435         ITEM_GTP,
 436         ITEM_GTPC,
 437         ITEM_GTPU,
 438         ITEM_GENEVE,
 439         ZERO,
 440 };
 441
 442 static const enum index item_fuzzy[] = {
 443         ITEM_FUZZY_THRESH,
 444         ITEM_NEXT,
 445         ZERO,
 446 };
 447
 448 static const enum index item_any[] = {
 449         ITEM_ANY_NUM,
 450         ITEM_NEXT,
 451         ZERO,
 452 };
 453
 454 static const enum index item_vf[] = {
 455         ITEM_VF_ID,
 456         ITEM_NEXT,
 457         ZERO,
 458 };
 459
 460 static const enum index item_port[] = {
 461         ITEM_PORT_INDEX,
 462         ITEM_NEXT,
 463         ZERO,
 464 };
 465
 466 static const enum index item_raw[] = {
 467         ITEM_RAW_RELATIVE,
 468         ITEM_RAW_SEARCH,
 469         ITEM_RAW_OFFSET,
 470         ITEM_RAW_LIMIT,
 471         ITEM_RAW_PATTERN,
 472         ITEM_NEXT,
 473         ZERO,
 474 };
 475
 476 static const enum index item_eth[] = {
 477         ITEM_ETH_DST,
 478         ITEM_ETH_SRC,
 479         ITEM_ETH_TYPE,
 480         ITEM_NEXT,
 481         ZERO,
 482 };
 483
 484 static const enum index item_vlan[] = {
 485         ITEM_VLAN_TPID,
 486         ITEM_VLAN_TCI,
 487         ITEM_VLAN_PCP,
 488         ITEM_VLAN_DEI,
 489         ITEM_VLAN_VID,
 490         ITEM_NEXT,
 491         ZERO,
 492 };
 493
 494 static const enum index item_ipv4[] = {
 495         ITEM_IPV4_TOS,
 496         ITEM_IPV4_TTL,
 497         ITEM_IPV4_PROTO,
 498         ITEM_IPV4_SRC,
 499         ITEM_IPV4_DST,
 500         ITEM_NEXT,
 501         ZERO,
 502 };
 503
 504 static const enum index item_ipv6[] = {
 505         ITEM_IPV6_TC,
 506         ITEM_IPV6_FLOW,
 507         ITEM_IPV6_PROTO,
 508         ITEM_IPV6_HOP,
 509         ITEM_IPV6_SRC,
 510         ITEM_IPV6_DST,
 511         ITEM_NEXT,
 512         ZERO,
 513 };
 514
 515 static const enum index item_icmp[] = {
 516         ITEM_ICMP_TYPE,
 517         ITEM_ICMP_CODE,
 518         ITEM_NEXT,
 519         ZERO,
 520 };
 521
 522 static const enum index item_udp[] = {
 523         ITEM_UDP_SRC,
 524         ITEM_UDP_DST,
 525         ITEM_NEXT,
 526         ZERO,
 527 };
 528
 529 static const enum index item_tcp[] = {
 530         ITEM_TCP_SRC,
 531         ITEM_TCP_DST,
 532         ITEM_TCP_FLAGS,
 533         ITEM_NEXT,
 534         ZERO,
 535 };
 536
 537 static const enum index item_sctp[] = {
 538         ITEM_SCTP_SRC,
 539         ITEM_SCTP_DST,
 540         ITEM_SCTP_TAG,
 541         ITEM_SCTP_CKSUM,
 542         ITEM_NEXT,
 543         ZERO,
 544 };
 545
 546 static const enum index item_vxlan[] = {
 547         ITEM_VXLAN_VNI,
 548         ITEM_NEXT,
 549         ZERO,
 550 };
 551
 552 static const enum index item_e_tag[] = {
 553         ITEM_E_TAG_GRP_ECID_B,
 554         ITEM_NEXT,
 555         ZERO,
 556 };
 557
 558 static const enum index item_nvgre[] = {
 559         ITEM_NVGRE_TNI,
 560         ITEM_NEXT,
 561         ZERO,
 562 };
 563
 564 static const enum index item_mpls[] = {
 565         ITEM_MPLS_LABEL,
 566         ITEM_NEXT,
 567         ZERO,
 568 };
 569
 570 static const enum index item_gre[] = {
 571         ITEM_GRE_PROTO,
 572         ITEM_NEXT,
 573         ZERO,
 574 };
 575
 576 static const enum index item_gtp[] = {
 577         ITEM_GTP_TEID,
 578         ITEM_NEXT,
 579         ZERO,
 580 };
 581
 582 static const enum index item_geneve[] = {
 583         ITEM_GENEVE_VNI,
 584         ITEM_GENEVE_PROTO,
 585         ITEM_NEXT,
 586         ZERO,
 587 };
 588
 589 static const enum index next_action[] = {
 590         ACTION_END,
 591         ACTION_VOID,
 592         ACTION_PASSTHRU,
 593         ACTION_MARK,
 594         ACTION_FLAG,
 595         ACTION_QUEUE,
 596         ACTION_DROP,
 597         ACTION_COUNT,
 598         ACTION_DUP,
 599         ACTION_RSS,
 600         ACTION_PF,
 601         ACTION_VF,
 602         ACTION_METER,
 603         ZERO,
 604 };
 605
 606 static const enum index action_mark[] = {
 607         ACTION_MARK_ID,
 608         ACTION_NEXT,
 609         ZERO,
 610 };
 611
 612 static const enum index action_queue[] = {
 613         ACTION_QUEUE_INDEX,
 614         ACTION_NEXT,
 615         ZERO,
 616 };
 617
 618 static const enum index action_dup[] = {
 619         ACTION_DUP_INDEX,
 620         ACTION_NEXT,
 621         ZERO,
 622 };
 623
 624 static const enum index action_rss[] = {
 625         ACTION_RSS_QUEUES,
 626         ACTION_NEXT,
 627         ZERO,
 628 };
 629
 630 static const enum index action_vf[] = {
 631         ACTION_VF_ORIGINAL,
 632         ACTION_VF_ID,
 633         ACTION_NEXT,
 634         ZERO,
 635 };
 636
 637 static const enum index action_meter[] = {
 638         ACTION_METER_ID,
 639         ACTION_NEXT,
 640         ZERO,
 641 };
 642
 643 static int parse_init(struct context *, const struct token *,
 644                       const char *, unsigned int,
 645                       void *, unsigned int);
 646 static int parse_vc(struct context *, const struct token *,
 647                     const char *, unsigned int,
 648                     void *, unsigned int);
 649 static int parse_vc_spec(struct context *, const struct token *,
 650                          const char *, unsigned int, void *, unsigned int);
 651 static int parse_vc_conf(struct context *, const struct token *,
 652                          const char *, unsigned int, void *, unsigned int);
 653 static int parse_vc_action_rss_queue(struct context *, const struct token *,
 654                                      const char *, unsigned int, void *,
 655                                      unsigned int);
 656 static int parse_destroy(struct context *, const struct token *,
 657                          const char *, unsigned int,
 658                          void *, unsigned int);
 659 static int parse_flush(struct context *, const struct token *,
 660                        const char *, unsigned int,
 661                        void *, unsigned int);
 662 static int parse_query(struct context *, const struct token *,
 663                        const char *, unsigned int,
 664                        void *, unsigned int);
 665 static int parse_action(struct context *, const struct token *,
 666                         const char *, unsigned int,
 667                         void *, unsigned int);
 668 static int parse_list(struct context *, const struct token *,
 669                       const char *, unsigned int,
 670                       void *, unsigned int);
 671 static int parse_isolate(struct context *, const struct token *,
 672                          const char *, unsigned int,
 673                          void *, unsigned int);
 674 static int parse_int(struct context *, const struct token *,
 675                      const char *, unsigned int,
 676                      void *, unsigned int);
 677 static int parse_prefix(struct context *, const struct token *,
 678                         const char *, unsigned int,
 679                         void *, unsigned int);
 680 static int parse_boolean(struct context *, const struct token *,
 681                          const char *, unsigned int,
 682                          void *, unsigned int);
 683 static int parse_string(struct context *, const struct token *,
 684                         const char *, unsigned int,
 685                         void *, unsigned int);
 686 static int parse_mac_addr(struct context *, const struct token *,
 687                           const char *, unsigned int,
 688                           void *, unsigned int);
 689 static int parse_ipv4_addr(struct context *, const struct token *,
 690                            const char *, unsigned int,
 691                            void *, unsigned int);
 692 static int parse_ipv6_addr(struct context *, const struct token *,
 693                            const char *, unsigned int,
 694                            void *, unsigned int);
 695 static int parse_port(struct context *, const struct token *,
 696                       const char *, unsigned int,
 697                       void *, unsigned int);
 698 static int comp_none(struct context *, const struct token *,
 699                      unsigned int, char *, unsigned int);
 700 static int comp_boolean(struct context *, const struct token *,
 701                         unsigned int, char *, unsigned int);
 702 static int comp_action(struct context *, const struct token *,
 703                        unsigned int, char *, unsigned int);
 704 static int comp_port(struct context *, const struct token *,
 705                      unsigned int, char *, unsigned int);
 706 static int comp_rule_id(struct context *, const struct token *,
 707                         unsigned int, char *, unsigned int);
 708 static int comp_vc_action_rss_queue(struct context *, const struct token *,
 709                                     unsigned int, char *, unsigned int);
 710
 711 /** Token definitions. */
 712 static const struct token token_list[] = {
 713         /* Special tokens. */
 714         [ZERO] = {
 715                 .name = "ZERO",
 716                 .help = "null entry, abused as the entry point",
 717                 .next = NEXT(NEXT_ENTRY(FLOW)),
 718         },
 719         [END] = {
 720                 .name = "",
 721                 .type = "RETURN",
 722                 .help = "command may end here",
 723         },
 724         /* Common tokens. */
 725         [INTEGER] = {
 726                 .name = "{int}",
 727                 .type = "INTEGER",
 728                 .help = "integer value",
 729                 .call = parse_int,
 730                 .comp = comp_none,
 731         },
 732         [UNSIGNED] = {
 733                 .name = "{unsigned}",
 734                 .type = "UNSIGNED",
 735                 .help = "unsigned integer value",
 736                 .call = parse_int,
 737                 .comp = comp_none,
 738         },
 739         [PREFIX] = {
 740                 .name = "{prefix}",
 741                 .type = "PREFIX",
 742                 .help = "prefix length for bit-mask",
 743                 .call = parse_prefix,
 744                 .comp = comp_none,
 745         },
 746         [BOOLEAN] = {
 747                 .name = "{boolean}",
 748                 .type = "BOOLEAN",
 749                 .help = "any boolean value",
 750                 .call = parse_boolean,
 751                 .comp = comp_boolean,
 752         },
 753         [STRING] = {
 754                 .name = "{string}",
 755                 .type = "STRING",
 756                 .help = "fixed string",
 757                 .call = parse_string,
 758                 .comp = comp_none,
 759         },
 760         [MAC_ADDR] = {
 761                 .name = "{MAC address}",
 762                 .type = "MAC-48",
 763                 .help = "standard MAC address notation",
 764                 .call = parse_mac_addr,
 765                 .comp = comp_none,
 766         },
 767         [IPV4_ADDR] = {
 768                 .name = "{IPv4 address}",
 769                 .type = "IPV4 ADDRESS",
 770                 .help = "standard IPv4 address notation",
 771                 .call = parse_ipv4_addr,
 772                 .comp = comp_none,
 773         },
 774         [IPV6_ADDR] = {
 775                 .name = "{IPv6 address}",
 776                 .type = "IPV6 ADDRESS",
 777                 .help = "standard IPv6 address notation",
 778                 .call = parse_ipv6_addr,
 779                 .comp = comp_none,
 780         },
 781         [RULE_ID] = {
 782                 .name = "{rule id}",
 783                 .type = "RULE ID",
 784                 .help = "rule identifier",
 785                 .call = parse_int,
 786                 .comp = comp_rule_id,
 787         },
 788         [PORT_ID] = {
 789                 .name = "{port_id}",
 790                 .type = "PORT ID",
 791                 .help = "port identifier",
 792                 .call = parse_port,
 793                 .comp = comp_port,
 794         },
 795         [GROUP_ID] = {
 796                 .name = "{group_id}",
 797                 .type = "GROUP ID",
 798                 .help = "group identifier",
 799                 .call = parse_int,
 800                 .comp = comp_none,
 801         },
 802         [PRIORITY_LEVEL] = {
 803                 .name = "{level}",
 804                 .type = "PRIORITY",
 805                 .help = "priority level",
 806                 .call = parse_int,
 807                 .comp = comp_none,
 808         },
 809         /* Top-level command. */
 810         [FLOW] = {
 811                 .name = "flow",
 812                 .type = "{command} {port_id} [{arg} [...]]",
 813                 .help = "manage ingress/egress flow rules",
 814                 .next = NEXT(NEXT_ENTRY
 815                              (VALIDATE,
 816                               CREATE,
 817                               DESTROY,
 818                               FLUSH,
 819                               LIST,
 820                               QUERY,
 821                               ISOLATE)),
 822                 .call = parse_init,
 823         },
 824         /* Sub-level commands. */
 825         [VALIDATE] = {
 826                 .name = "validate",
 827                 .help = "check whether a flow rule can be created",
 828                 .next = NEXT(next_vc_attr, NEXT_ENTRY(PORT_ID)),
 829                 .args = ARGS(ARGS_ENTRY(struct buffer, port)),
 830                 .call = parse_vc,
 831         },
 832         [CREATE] = {
 833                 .name = "create",
 834                 .help = "create a flow rule",
 835                 .next = NEXT(next_vc_attr, NEXT_ENTRY(PORT_ID)),
 836                 .args = ARGS(ARGS_ENTRY(struct buffer, port)),
 837                 .call = parse_vc,
 838         },
 839         [DESTROY] = {
 840                 .name = "destroy",
 841                 .help = "destroy specific flow rules",
 842                 .next = NEXT(NEXT_ENTRY(DESTROY_RULE), NEXT_ENTRY(PORT_ID)),
 843                 .args = ARGS(ARGS_ENTRY(struct buffer, port)),
 844                 .call = parse_destroy,
 845         },
 846         [FLUSH] = {
 847                 .name = "flush",
 848                 .help = "destroy all flow rules",
 849                 .next = NEXT(NEXT_ENTRY(PORT_ID)),
 850                 .args = ARGS(ARGS_ENTRY(struct buffer, port)),
 851                 .call = parse_flush,
 852         },
 853         [QUERY] = {
 854                 .name = "query",
 855                 .help = "query an existing flow rule",
 856                 .next = NEXT(NEXT_ENTRY(QUERY_ACTION),
 857                              NEXT_ENTRY(RULE_ID),
 858                              NEXT_ENTRY(PORT_ID)),
 859                 .args = ARGS(ARGS_ENTRY(struct buffer, args.query.action),
 860                              ARGS_ENTRY(struct buffer, args.query.rule),
 861                              ARGS_ENTRY(struct buffer, port)),
 862                 .call = parse_query,
 863         },
 864         [LIST] = {
 865                 .name = "list",
 866                 .help = "list existing flow rules",
 867                 .next = NEXT(next_list_attr, NEXT_ENTRY(PORT_ID)),
 868                 .args = ARGS(ARGS_ENTRY(struct buffer, port)),
 869                 .call = parse_list,
 870         },
 871         [ISOLATE] = {
 872                 .name = "isolate",
 873                 .help = "restrict ingress traffic to the defined flow rules",
 874                 .next = NEXT(NEXT_ENTRY(BOOLEAN),
 875                              NEXT_ENTRY(PORT_ID)),
 876                 .args = ARGS(ARGS_ENTRY(struct buffer, args.isolate.set),
 877                              ARGS_ENTRY(struct buffer, port)),
 878                 .call = parse_isolate,
 879         },
 880         /* Destroy arguments. */
 881         [DESTROY_RULE] = {
 882                 .name = "rule",
 883                 .help = "specify a rule identifier",
 884                 .next = NEXT(next_destroy_attr, NEXT_ENTRY(RULE_ID)),
 885                 .args = ARGS(ARGS_ENTRY_PTR(struct buffer, args.destroy.rule)),
 886                 .call = parse_destroy,
 887         },
 888         /* Query arguments. */
 889         [QUERY_ACTION] = {
 890                 .name = "{action}",
 891                 .type = "ACTION",
 892                 .help = "action to query, must be part of the rule",
 893                 .call = parse_action,
 894                 .comp = comp_action,
 895         },
 896         /* List arguments. */
 897         [LIST_GROUP] = {
 898                 .name = "group",
 899                 .help = "specify a group",
 900                 .next = NEXT(next_list_attr, NEXT_ENTRY(GROUP_ID)),
 901                 .args = ARGS(ARGS_ENTRY_PTR(struct buffer, args.list.group)),
 902                 .call = parse_list,
 903         },
 904         /* Validate/create attributes. */
 905         [GROUP] = {
 906                 .name = "group",
 907                 .help = "specify a group",
 908                 .next = NEXT(next_vc_attr, NEXT_ENTRY(GROUP_ID)),
 909                 .args = ARGS(ARGS_ENTRY(struct rte_flow_attr, group)),
 910                 .call = parse_vc,
 911         },
 912         [PRIORITY] = {
 913                 .name = "priority",
 914                 .help = "specify a priority level",
 915                 .next = NEXT(next_vc_attr, NEXT_ENTRY(PRIORITY_LEVEL)),
 916                 .args = ARGS(ARGS_ENTRY(struct rte_flow_attr, priority)),
 917                 .call = parse_vc,
 918         },
 919         [INGRESS] = {
 920                 .name = "ingress",
 921                 .help = "affect rule to ingress",
 922                 .next = NEXT(next_vc_attr),
 923                 .call = parse_vc,
 924         },
 925         [EGRESS] = {
 926                 .name = "egress",
 927                 .help = "affect rule to egress",
 928                 .next = NEXT(next_vc_attr),
 929                 .call = parse_vc,
 930         },
 931         /* Validate/create pattern. */
 932         [PATTERN] = {
 933                 .name = "pattern",
 934                 .help = "submit a list of pattern items",
 935                 .next = NEXT(next_item),
 936                 .call = parse_vc,
 937         },
 938         [ITEM_PARAM_IS] = {
 939                 .name = "is",
 940                 .help = "match value perfectly (with full bit-mask)",
 941                 .call = parse_vc_spec,
 942         },
 943         [ITEM_PARAM_SPEC] = {
 944                 .name = "spec",
 945                 .help = "match value according to configured bit-mask",
 946                 .call = parse_vc_spec,
 947         },
 948         [ITEM_PARAM_LAST] = {
 949                 .name = "last",
 950                 .help = "specify upper bound to establish a range",
 951                 .call = parse_vc_spec,
 952         },
 953         [ITEM_PARAM_MASK] = {
 954                 .name = "mask",
 955                 .help = "specify bit-mask with relevant bits set to one",
 956                 .call = parse_vc_spec,
 957         },
 958         [ITEM_PARAM_PREFIX] = {
 959                 .name = "prefix",
 960                 .help = "generate bit-mask from a prefix length",
 961                 .call = parse_vc_spec,
 962         },
 963         [ITEM_NEXT] = {
 964                 .name = "/",
 965                 .help = "specify next pattern item",
 966                 .next = NEXT(next_item),
 967         },
 968         [ITEM_END] = {
 969                 .name = "end",
 970                 .help = "end list of pattern items",
 971                 .priv = PRIV_ITEM(END, 0),
 972                 .next = NEXT(NEXT_ENTRY(ACTIONS)),
 973                 .call = parse_vc,
 974         },
 975         [ITEM_VOID] = {
 976                 .name = "void",
 977                 .help = "no-op pattern item",
 978                 .priv = PRIV_ITEM(VOID, 0),
 979                 .next = NEXT(NEXT_ENTRY(ITEM_NEXT)),
 980                 .call = parse_vc,
 981         },
 982         [ITEM_INVERT] = {
 983                 .name = "invert",
 984                 .help = "perform actions when pattern does not match",
 985                 .priv = PRIV_ITEM(INVERT, 0),
 986                 .next = NEXT(NEXT_ENTRY(ITEM_NEXT)),
 987                 .call = parse_vc,
 988         },
 989         [ITEM_ANY] = {
 990                 .name = "any",
 991                 .help = "match any protocol for the current layer",
 992                 .priv = PRIV_ITEM(ANY, sizeof(struct rte_flow_item_any)),
 993                 .next = NEXT(item_any),
 994                 .call = parse_vc,
 995         },
 996         [ITEM_ANY_NUM] = {
 997                 .name = "num",
 998                 .help = "number of layers covered",
 999                 .next = NEXT(item_any, NEXT_ENTRY(UNSIGNED), item_param),
1000                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_any, num)),
1001         },
1002         [ITEM_PF] = {
1003                 .name = "pf",
1004                 .help = "match packets addressed to the physical function",
1005                 .priv = PRIV_ITEM(PF, 0),
1006                 .next = NEXT(NEXT_ENTRY(ITEM_NEXT)),
1007                 .call = parse_vc,
1008         },
1009         [ITEM_VF] = {
1010                 .name = "vf",
1011                 .help = "match packets addressed to a virtual function ID",
1012                 .priv = PRIV_ITEM(VF, sizeof(struct rte_flow_item_vf)),
1013                 .next = NEXT(item_vf),
1014                 .call = parse_vc,
1015         },
1016         [ITEM_VF_ID] = {
1017                 .name = "id",
1018                 .help = "destination VF ID",
1019                 .next = NEXT(item_vf, NEXT_ENTRY(UNSIGNED), item_param),
1020                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_vf, id)),
1021         },
1022         [ITEM_PORT] = {
1023                 .name = "port",
1024                 .help = "device-specific physical port index to use",
1025                 .priv = PRIV_ITEM(PORT, sizeof(struct rte_flow_item_port)),
1026                 .next = NEXT(item_port),
1027                 .call = parse_vc,
1028         },
1029         [ITEM_PORT_INDEX] = {
1030                 .name = "index",
1031                 .help = "physical port index",
1032                 .next = NEXT(item_port, NEXT_ENTRY(UNSIGNED), item_param),
1033                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_port, index)),
1034         },
1035         [ITEM_RAW] = {
1036                 .name = "raw",
1037                 .help = "match an arbitrary byte string",
1038                 .priv = PRIV_ITEM(RAW, ITEM_RAW_SIZE),
1039                 .next = NEXT(item_raw),
1040                 .call = parse_vc,
1041         },
1042         [ITEM_RAW_RELATIVE] = {
1043                 .name = "relative",
1044                 .help = "look for pattern after the previous item",
1045                 .next = NEXT(item_raw, NEXT_ENTRY(BOOLEAN), item_param),
1046                 .args = ARGS(ARGS_ENTRY_BF(struct rte_flow_item_raw,
1047                                            relative, 1)),
1048         },
1049         [ITEM_RAW_SEARCH] = {
1050                 .name = "search",
1051                 .help = "search pattern from offset (see also limit)",
1052                 .next = NEXT(item_raw, NEXT_ENTRY(BOOLEAN), item_param),
1053                 .args = ARGS(ARGS_ENTRY_BF(struct rte_flow_item_raw,
1054                                            search, 1)),
1055         },
1056         [ITEM_RAW_OFFSET] = {
1057                 .name = "offset",
1058                 .help = "absolute or relative offset for pattern",
1059                 .next = NEXT(item_raw, NEXT_ENTRY(INTEGER), item_param),
1060                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_raw, offset)),
1061         },
1062         [ITEM_RAW_LIMIT] = {
1063                 .name = "limit",
1064                 .help = "search area limit for start of pattern",
1065                 .next = NEXT(item_raw, NEXT_ENTRY(UNSIGNED), item_param),
1066                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_raw, limit)),
1067         },
1068         [ITEM_RAW_PATTERN] = {
1069                 .name = "pattern",
1070                 .help = "byte string to look for",
1071                 .next = NEXT(item_raw,
1072                              NEXT_ENTRY(STRING),
1073                              NEXT_ENTRY(ITEM_PARAM_IS,
1074                                         ITEM_PARAM_SPEC,
1075                                         ITEM_PARAM_MASK)),
1076                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_raw, length),
1077                              ARGS_ENTRY_USZ(struct rte_flow_item_raw,
1078                                             pattern,
1079                                             ITEM_RAW_PATTERN_SIZE)),
1080         },
1081         [ITEM_ETH] = {
1082                 .name = "eth",
1083                 .help = "match Ethernet header",
1084                 .priv = PRIV_ITEM(ETH, sizeof(struct rte_flow_item_eth)),
1085                 .next = NEXT(item_eth),
1086                 .call = parse_vc,
1087         },
1088         [ITEM_ETH_DST] = {
1089                 .name = "dst",
1090                 .help = "destination MAC",
1091                 .next = NEXT(item_eth, NEXT_ENTRY(MAC_ADDR), item_param),
1092                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_eth, dst)),
1093         },
1094         [ITEM_ETH_SRC] = {
1095                 .name = "src",
1096                 .help = "source MAC",
1097                 .next = NEXT(item_eth, NEXT_ENTRY(MAC_ADDR), item_param),
1098                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_eth, src)),
1099         },
1100         [ITEM_ETH_TYPE] = {
1101                 .name = "type",
1102                 .help = "EtherType",
1103                 .next = NEXT(item_eth, NEXT_ENTRY(UNSIGNED), item_param),
1104                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_eth, type)),
1105         },
1106         [ITEM_VLAN] = {
1107                 .name = "vlan",
1108                 .help = "match 802.1Q/ad VLAN tag",
1109                 .priv = PRIV_ITEM(VLAN, sizeof(struct rte_flow_item_vlan)),
1110                 .next = NEXT(item_vlan),
1111                 .call = parse_vc,
1112         },
1113         [ITEM_VLAN_TPID] = {
1114                 .name = "tpid",
1115                 .help = "tag protocol identifier",
1116                 .next = NEXT(item_vlan, NEXT_ENTRY(UNSIGNED), item_param),
1117                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_vlan, tpid)),
1118         },
1119         [ITEM_VLAN_TCI] = {
1120                 .name = "tci",
1121                 .help = "tag control information",
1122                 .next = NEXT(item_vlan, NEXT_ENTRY(UNSIGNED), item_param),
1123                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_vlan, tci)),
1124         },
1125         [ITEM_VLAN_PCP] = {
1126                 .name = "pcp",
1127                 .help = "priority code point",
1128                 .next = NEXT(item_vlan, NEXT_ENTRY(UNSIGNED), item_param),
1129                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_vlan,
1130                                                   tci, "\xe0\x00")),
1131         },
1132         [ITEM_VLAN_DEI] = {
1133                 .name = "dei",
1134                 .help = "drop eligible indicator",
1135                 .next = NEXT(item_vlan, NEXT_ENTRY(UNSIGNED), item_param),
1136                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_vlan,
1137                                                   tci, "\x10\x00")),
1138         },
1139         [ITEM_VLAN_VID] = {
1140                 .name = "vid",
1141                 .help = "VLAN identifier",
1142                 .next = NEXT(item_vlan, NEXT_ENTRY(UNSIGNED), item_param),
1143                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_vlan,
1144                                                   tci, "\x0f\xff")),
1145         },
1146         [ITEM_IPV4] = {
1147                 .name = "ipv4",
1148                 .help = "match IPv4 header",
1149                 .priv = PRIV_ITEM(IPV4, sizeof(struct rte_flow_item_ipv4)),
1150                 .next = NEXT(item_ipv4),
1151                 .call = parse_vc,
1152         },
1153         [ITEM_IPV4_TOS] = {
1154                 .name = "tos",
1155                 .help = "type of service",
1156                 .next = NEXT(item_ipv4, NEXT_ENTRY(UNSIGNED), item_param),
1157                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv4,
1158                                              hdr.type_of_service)),
1159         },
1160         [ITEM_IPV4_TTL] = {
1161                 .name = "ttl",
1162                 .help = "time to live",
1163                 .next = NEXT(item_ipv4, NEXT_ENTRY(UNSIGNED), item_param),
1164                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv4,
1165                                              hdr.time_to_live)),
1166         },
1167         [ITEM_IPV4_PROTO] = {
1168                 .name = "proto",
1169                 .help = "next protocol ID",
1170                 .next = NEXT(item_ipv4, NEXT_ENTRY(UNSIGNED), item_param),
1171                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv4,
1172                                              hdr.next_proto_id)),
1173         },
1174         [ITEM_IPV4_SRC] = {
1175                 .name = "src",
1176                 .help = "source address",
1177                 .next = NEXT(item_ipv4, NEXT_ENTRY(IPV4_ADDR), item_param),
1178                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv4,
1179                                              hdr.src_addr)),
1180         },
1181         [ITEM_IPV4_DST] = {
1182                 .name = "dst",
1183                 .help = "destination address",
1184                 .next = NEXT(item_ipv4, NEXT_ENTRY(IPV4_ADDR), item_param),
1185                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv4,
1186                                              hdr.dst_addr)),
1187         },
1188         [ITEM_IPV6] = {
1189                 .name = "ipv6",
1190                 .help = "match IPv6 header",
1191                 .priv = PRIV_ITEM(IPV6, sizeof(struct rte_flow_item_ipv6)),
1192                 .next = NEXT(item_ipv6),
1193                 .call = parse_vc,
1194         },
1195         [ITEM_IPV6_TC] = {
1196                 .name = "tc",
1197                 .help = "traffic class",
1198                 .next = NEXT(item_ipv6, NEXT_ENTRY(UNSIGNED), item_param),
1199                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_ipv6,
1200                                                   hdr.vtc_flow,
1201                                                   "\x0f\xf0\x00\x00")),
1202         },
1203         [ITEM_IPV6_FLOW] = {
1204                 .name = "flow",
1205                 .help = "flow label",
1206                 .next = NEXT(item_ipv6, NEXT_ENTRY(UNSIGNED), item_param),
1207                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_ipv6,
1208                                                   hdr.vtc_flow,
1209                                                   "\x00\x0f\xff\xff")),
1210         },
1211         [ITEM_IPV6_PROTO] = {
1212                 .name = "proto",
1213                 .help = "protocol (next header)",
1214                 .next = NEXT(item_ipv6, NEXT_ENTRY(UNSIGNED), item_param),
1215                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv6,
1216                                              hdr.proto)),
1217         },
1218         [ITEM_IPV6_HOP] = {
1219                 .name = "hop",
1220                 .help = "hop limit",
1221                 .next = NEXT(item_ipv6, NEXT_ENTRY(UNSIGNED), item_param),
1222                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv6,
1223                                              hdr.hop_limits)),
1224         },
1225         [ITEM_IPV6_SRC] = {
1226                 .name = "src",
1227                 .help = "source address",
1228                 .next = NEXT(item_ipv6, NEXT_ENTRY(IPV6_ADDR), item_param),
1229                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv6,
1230                                              hdr.src_addr)),
1231         },
1232         [ITEM_IPV6_DST] = {
1233                 .name = "dst",
1234                 .help = "destination address",
1235                 .next = NEXT(item_ipv6, NEXT_ENTRY(IPV6_ADDR), item_param),
1236                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_ipv6,
1237                                              hdr.dst_addr)),
1238         },
1239         [ITEM_ICMP] = {
1240                 .name = "icmp",
1241                 .help = "match ICMP header",
1242                 .priv = PRIV_ITEM(ICMP, sizeof(struct rte_flow_item_icmp)),
1243                 .next = NEXT(item_icmp),
1244                 .call = parse_vc,
1245         },
1246         [ITEM_ICMP_TYPE] = {
1247                 .name = "type",
1248                 .help = "ICMP packet type",
1249                 .next = NEXT(item_icmp, NEXT_ENTRY(UNSIGNED), item_param),
1250                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp,
1251                                              hdr.icmp_type)),
1252         },
1253         [ITEM_ICMP_CODE] = {
1254                 .name = "code",
1255                 .help = "ICMP packet code",
1256                 .next = NEXT(item_icmp, NEXT_ENTRY(UNSIGNED), item_param),
1257                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_icmp,
1258                                              hdr.icmp_code)),
1259         },
1260         [ITEM_UDP] = {
1261                 .name = "udp",
1262                 .help = "match UDP header",
1263                 .priv = PRIV_ITEM(UDP, sizeof(struct rte_flow_item_udp)),
1264                 .next = NEXT(item_udp),
1265                 .call = parse_vc,
1266         },
1267         [ITEM_UDP_SRC] = {
1268                 .name = "src",
1269                 .help = "UDP source port",
1270                 .next = NEXT(item_udp, NEXT_ENTRY(UNSIGNED), item_param),
1271                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_udp,
1272                                              hdr.src_port)),
1273         },
1274         [ITEM_UDP_DST] = {
1275                 .name = "dst",
1276                 .help = "UDP destination port",
1277                 .next = NEXT(item_udp, NEXT_ENTRY(UNSIGNED), item_param),
1278                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_udp,
1279                                              hdr.dst_port)),
1280         },
1281         [ITEM_TCP] = {
1282                 .name = "tcp",
1283                 .help = "match TCP header",
1284                 .priv = PRIV_ITEM(TCP, sizeof(struct rte_flow_item_tcp)),
1285                 .next = NEXT(item_tcp),
1286                 .call = parse_vc,
1287         },
1288         [ITEM_TCP_SRC] = {
1289                 .name = "src",
1290                 .help = "TCP source port",
1291                 .next = NEXT(item_tcp, NEXT_ENTRY(UNSIGNED), item_param),
1292                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_tcp,
1293                                              hdr.src_port)),
1294         },
1295         [ITEM_TCP_DST] = {
1296                 .name = "dst",
1297                 .help = "TCP destination port",
1298                 .next = NEXT(item_tcp, NEXT_ENTRY(UNSIGNED), item_param),
1299                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_tcp,
1300                                              hdr.dst_port)),
1301         },
1302         [ITEM_TCP_FLAGS] = {
1303                 .name = "flags",
1304                 .help = "TCP flags",
1305                 .next = NEXT(item_tcp, NEXT_ENTRY(UNSIGNED), item_param),
1306                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_tcp,
1307                                              hdr.tcp_flags)),
1308         },
1309         [ITEM_SCTP] = {
1310                 .name = "sctp",
1311                 .help = "match SCTP header",
1312                 .priv = PRIV_ITEM(SCTP, sizeof(struct rte_flow_item_sctp)),
1313                 .next = NEXT(item_sctp),
1314                 .call = parse_vc,
1315         },
1316         [ITEM_SCTP_SRC] = {
1317                 .name = "src",
1318                 .help = "SCTP source port",
1319                 .next = NEXT(item_sctp, NEXT_ENTRY(UNSIGNED), item_param),
1320                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_sctp,
1321                                              hdr.src_port)),
1322         },
1323         [ITEM_SCTP_DST] = {
1324                 .name = "dst",
1325                 .help = "SCTP destination port",
1326                 .next = NEXT(item_sctp, NEXT_ENTRY(UNSIGNED), item_param),
1327                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_sctp,
1328                                              hdr.dst_port)),
1329         },
1330         [ITEM_SCTP_TAG] = {
1331                 .name = "tag",
1332                 .help = "validation tag",
1333                 .next = NEXT(item_sctp, NEXT_ENTRY(UNSIGNED), item_param),
1334                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_sctp,
1335                                              hdr.tag)),
1336         },
1337         [ITEM_SCTP_CKSUM] = {
1338                 .name = "cksum",
1339                 .help = "checksum",
1340                 .next = NEXT(item_sctp, NEXT_ENTRY(UNSIGNED), item_param),
1341                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_sctp,
1342                                              hdr.cksum)),
1343         },
1344         [ITEM_VXLAN] = {
1345                 .name = "vxlan",
1346                 .help = "match VXLAN header",
1347                 .priv = PRIV_ITEM(VXLAN, sizeof(struct rte_flow_item_vxlan)),
1348                 .next = NEXT(item_vxlan),
1349                 .call = parse_vc,
1350         },
1351         [ITEM_VXLAN_VNI] = {
1352                 .name = "vni",
1353                 .help = "VXLAN identifier",
1354                 .next = NEXT(item_vxlan, NEXT_ENTRY(UNSIGNED), item_param),
1355                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_vxlan, vni)),
1356         },
1357         [ITEM_E_TAG] = {
1358                 .name = "e_tag",
1359                 .help = "match E-Tag header",
1360                 .priv = PRIV_ITEM(E_TAG, sizeof(struct rte_flow_item_e_tag)),
1361                 .next = NEXT(item_e_tag),
1362                 .call = parse_vc,
1363         },
1364         [ITEM_E_TAG_GRP_ECID_B] = {
1365                 .name = "grp_ecid_b",
1366                 .help = "GRP and E-CID base",
1367                 .next = NEXT(item_e_tag, NEXT_ENTRY(UNSIGNED), item_param),
1368                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_e_tag,
1369                                                   rsvd_grp_ecid_b,
1370                                                   "\x3f\xff")),
1371         },
1372         [ITEM_NVGRE] = {
1373                 .name = "nvgre",
1374                 .help = "match NVGRE header",
1375                 .priv = PRIV_ITEM(NVGRE, sizeof(struct rte_flow_item_nvgre)),
1376                 .next = NEXT(item_nvgre),
1377                 .call = parse_vc,
1378         },
1379         [ITEM_NVGRE_TNI] = {
1380                 .name = "tni",
1381                 .help = "virtual subnet ID",
1382                 .next = NEXT(item_nvgre, NEXT_ENTRY(UNSIGNED), item_param),
1383                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_nvgre, tni)),
1384         },
1385         [ITEM_MPLS] = {
1386                 .name = "mpls",
1387                 .help = "match MPLS header",
1388                 .priv = PRIV_ITEM(MPLS, sizeof(struct rte_flow_item_mpls)),
1389                 .next = NEXT(item_mpls),
1390                 .call = parse_vc,
1391         },
1392         [ITEM_MPLS_LABEL] = {
1393                 .name = "label",
1394                 .help = "MPLS label",
1395                 .next = NEXT(item_mpls, NEXT_ENTRY(UNSIGNED), item_param),
1396                 .args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_mpls,
1397                                                   label_tc_s,
1398                                                   "\xff\xff\xf0")),
1399         },
1400         [ITEM_GRE] = {
1401                 .name = "gre",
1402                 .help = "match GRE header",
1403                 .priv = PRIV_ITEM(GRE, sizeof(struct rte_flow_item_gre)),
1404                 .next = NEXT(item_gre),
1405                 .call = parse_vc,
1406         },
1407         [ITEM_GRE_PROTO] = {
1408                 .name = "protocol",
1409                 .help = "GRE protocol type",
1410                 .next = NEXT(item_gre, NEXT_ENTRY(UNSIGNED), item_param),
1411                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gre,
1412                                              protocol)),
1413         },
1414         [ITEM_FUZZY] = {
1415                 .name = "fuzzy",
1416                 .help = "fuzzy pattern match, expect faster than default",
1417                 .priv = PRIV_ITEM(FUZZY,
1418                                 sizeof(struct rte_flow_item_fuzzy)),
1419                 .next = NEXT(item_fuzzy),
1420                 .call = parse_vc,
1421         },
1422         [ITEM_FUZZY_THRESH] = {
1423                 .name = "thresh",
1424                 .help = "match accuracy threshold",
1425                 .next = NEXT(item_fuzzy, NEXT_ENTRY(UNSIGNED), item_param),
1426                 .args = ARGS(ARGS_ENTRY(struct rte_flow_item_fuzzy,
1427                                         thresh)),
1428         },
1429         [ITEM_GTP] = {
1430                 .name = "gtp",
1431                 .help = "match GTP header",
1432                 .priv = PRIV_ITEM(GTP, sizeof(struct rte_flow_item_gtp)),
1433                 .next = NEXT(item_gtp),
1434                 .call = parse_vc,
1435         },
1436         [ITEM_GTP_TEID] = {
1437                 .name = "teid",
1438                 .help = "tunnel endpoint identifier",
1439                 .next = NEXT(item_gtp, NEXT_ENTRY(UNSIGNED), item_param),
1440                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_gtp, teid)),
1441         },
1442         [ITEM_GTPC] = {
1443                 .name = "gtpc",
1444                 .help = "match GTP header",
1445                 .priv = PRIV_ITEM(GTPC, sizeof(struct rte_flow_item_gtp)),
1446                 .next = NEXT(item_gtp),
1447                 .call = parse_vc,
1448         },
1449         [ITEM_GTPU] = {
1450                 .name = "gtpu",
1451                 .help = "match GTP header",
1452                 .priv = PRIV_ITEM(GTPU, sizeof(struct rte_flow_item_gtp)),
1453                 .next = NEXT(item_gtp),
1454                 .call = parse_vc,
1455         },
1456         [ITEM_GENEVE] = {
1457                 .name = "geneve",
1458                 .help = "match GENEVE header",
1459                 .priv = PRIV_ITEM(GENEVE, sizeof(struct rte_flow_item_geneve)),
1460                 .next = NEXT(item_geneve),
1461                 .call = parse_vc,
1462         },
1463         [ITEM_GENEVE_VNI] = {
1464                 .name = "vni",
1465                 .help = "virtual network identifier",
1466                 .next = NEXT(item_geneve, NEXT_ENTRY(UNSIGNED), item_param),
1467                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_geneve, vni)),
1468         },
1469         [ITEM_GENEVE_PROTO] = {
1470                 .name = "protocol",
1471                 .help = "GENEVE protocol type",
1472                 .next = NEXT(item_geneve, NEXT_ENTRY(UNSIGNED), item_param),
1473                 .args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_geneve,
1474                                              protocol)),
1475         },
1476
1477         /* Validate/create actions. */
1478         [ACTIONS] = {
1479                 .name = "actions",
1480                 .help = "submit a list of associated actions",
1481                 .next = NEXT(next_action),
1482                 .call = parse_vc,
1483         },
1484         [ACTION_NEXT] = {
1485                 .name = "/",
1486                 .help = "specify next action",
1487                 .next = NEXT(next_action),
1488         },
1489         [ACTION_END] = {
1490                 .name = "end",
1491                 .help = "end list of actions",
1492                 .priv = PRIV_ACTION(END, 0),
1493                 .call = parse_vc,
1494         },
1495         [ACTION_VOID] = {
1496                 .name = "void",
1497                 .help = "no-op action",
1498                 .priv = PRIV_ACTION(VOID, 0),
1499                 .next = NEXT(NEXT_ENTRY(ACTION_NEXT)),
1500                 .call = parse_vc,
1501         },
1502         [ACTION_PASSTHRU] = {
1503                 .name = "passthru",
1504                 .help = "let subsequent rule process matched packets",
1505                 .priv = PRIV_ACTION(PASSTHRU, 0),
1506                 .next = NEXT(NEXT_ENTRY(ACTION_NEXT)),
1507                 .call = parse_vc,
1508         },
1509         [ACTION_MARK] = {
1510                 .name = "mark",
1511                 .help = "attach 32 bit value to packets",
1512                 .priv = PRIV_ACTION(MARK, sizeof(struct rte_flow_action_mark)),
1513                 .next = NEXT(action_mark),
1514                 .call = parse_vc,
1515         },
1516         [ACTION_MARK_ID] = {
1517                 .name = "id",
1518                 .help = "32 bit value to return with packets",
1519                 .next = NEXT(action_mark, NEXT_ENTRY(UNSIGNED)),
1520                 .args = ARGS(ARGS_ENTRY(struct rte_flow_action_mark, id)),
1521                 .call = parse_vc_conf,
1522         },
1523         [ACTION_FLAG] = {
1524                 .name = "flag",
1525                 .help = "flag packets",
1526                 .priv = PRIV_ACTION(FLAG, 0),
1527                 .next = NEXT(NEXT_ENTRY(ACTION_NEXT)),
1528                 .call = parse_vc,
1529         },
1530         [ACTION_QUEUE] = {
1531                 .name = "queue",
1532                 .help = "assign packets to a given queue index",
1533                 .priv = PRIV_ACTION(QUEUE,
1534                                     sizeof(struct rte_flow_action_queue)),
1535                 .next = NEXT(action_queue),
1536                 .call = parse_vc,
1537         },
1538         [ACTION_QUEUE_INDEX] = {
1539                 .name = "index",
1540                 .help = "queue index to use",
1541                 .next = NEXT(action_queue, NEXT_ENTRY(UNSIGNED)),
1542                 .args = ARGS(ARGS_ENTRY(struct rte_flow_action_queue, index)),
1543                 .call = parse_vc_conf,
1544         },
1545         [ACTION_DROP] = {
1546                 .name = "drop",
1547                 .help = "drop packets (note: passthru has priority)",
1548                 .priv = PRIV_ACTION(DROP, 0),
1549                 .next = NEXT(NEXT_ENTRY(ACTION_NEXT)),
1550                 .call = parse_vc,
1551         },
1552         [ACTION_COUNT] = {
1553                 .name = "count",
1554                 .help = "enable counters for this rule",
1555                 .priv = PRIV_ACTION(COUNT, 0),
1556                 .next = NEXT(NEXT_ENTRY(ACTION_NEXT)),
1557                 .call = parse_vc,
1558         },
1559         [ACTION_DUP] = {
1560                 .name = "dup",
1561                 .help = "duplicate packets to a given queue index",
1562                 .priv = PRIV_ACTION(DUP, sizeof(struct rte_flow_action_dup)),
1563                 .next = NEXT(action_dup),
1564                 .call = parse_vc,
1565         },
1566         [ACTION_DUP_INDEX] = {
1567                 .name = "index",
1568                 .help = "queue index to duplicate packets to",
1569                 .next = NEXT(action_dup, NEXT_ENTRY(UNSIGNED)),
1570                 .args = ARGS(ARGS_ENTRY(struct rte_flow_action_dup, index)),
1571                 .call = parse_vc_conf,
1572         },
1573         [ACTION_RSS] = {
1574                 .name = "rss",
1575                 .help = "spread packets among several queues",
1576                 .priv = PRIV_ACTION(RSS, ACTION_RSS_SIZE),
1577                 .next = NEXT(action_rss),
1578                 .call = parse_vc,
1579         },
1580         [ACTION_RSS_QUEUES] = {
1581                 .name = "queues",
1582                 .help = "queue indices to use",
1583                 .next = NEXT(action_rss, NEXT_ENTRY(ACTION_RSS_QUEUE)),
1584                 .call = parse_vc_conf,
1585         },
1586         [ACTION_RSS_QUEUE] = {
1587                 .name = "{queue}",
1588                 .help = "queue index",
1589                 .call = parse_vc_action_rss_queue,
1590                 .comp = comp_vc_action_rss_queue,
1591         },
1592         [ACTION_PF] = {
1593                 .name = "pf",
1594                 .help = "redirect packets to physical device function",
1595                 .priv = PRIV_ACTION(PF, 0),
1596                 .next = NEXT(NEXT_ENTRY(ACTION_NEXT)),
1597                 .call = parse_vc,
1598         },
1599         [ACTION_VF] = {
1600                 .name = "vf",
1601                 .help = "redirect packets to virtual device function",
1602                 .priv = PRIV_ACTION(VF, sizeof(struct rte_flow_action_vf)),
1603                 .next = NEXT(action_vf),
1604                 .call = parse_vc,
1605         },
1606         [ACTION_VF_ORIGINAL] = {
1607                 .name = "original",
1608                 .help = "use original VF ID if possible",
1609                 .next = NEXT(action_vf, NEXT_ENTRY(BOOLEAN)),
1610                 .args = ARGS(ARGS_ENTRY_BF(struct rte_flow_action_vf,
1611                                            original, 1)),
1612                 .call = parse_vc_conf,
1613         },
1614         [ACTION_VF_ID] = {
1615                 .name = "id",
1616                 .help = "VF ID to redirect packets to",
1617                 .next = NEXT(action_vf, NEXT_ENTRY(UNSIGNED)),
1618                 .args = ARGS(ARGS_ENTRY(struct rte_flow_action_vf, id)),
1619                 .call = parse_vc_conf,
1620         },
1621         [ACTION_METER] = {
1622                 .name = "meter",
1623                 .help = "meter the directed packets at given id",
1624                 .priv = PRIV_ACTION(METER,
1625                                     sizeof(struct rte_flow_action_meter)),
1626                 .next = NEXT(action_meter),
1627                 .call = parse_vc,
1628         },
1629         [ACTION_METER_ID] = {
1630                 .name = "mtr_id",
1631                 .help = "meter id to use",
1632                 .next = NEXT(action_meter, NEXT_ENTRY(UNSIGNED)),
1633                 .args = ARGS(ARGS_ENTRY(struct rte_flow_action_meter, mtr_id)),
1634                 .call = parse_vc_conf,
1635         },
1636 };
1637
1638 /** Remove and return last entry from argument stack. */
1639 static const struct arg *
1640 pop_args(struct context *ctx)
1641 {
1642         return ctx->args_num ? ctx->args[--ctx->args_num] : NULL;
1643 }
1644
1645 /** Add entry on top of the argument stack. */
1646 static int
1647 push_args(struct context *ctx, const struct arg *arg)
1648 {
1649         if (ctx->args_num == CTX_STACK_SIZE)
1650                 return -1;
1651         ctx->args[ctx->args_num++] = arg;
1652         return 0;
1653 }
1654
1655 /** Spread value into buffer according to bit-mask. */
1656 static size_t
1657 arg_entry_bf_fill(void *dst, uintmax_t val, const struct arg *arg)
1658 {
1659         uint32_t i = arg->size;
1660         uint32_t end = 0;
1661         int sub = 1;
1662         int add = 0;
1663         size_t len = 0;
1664
1665         if (!arg->mask)
1666                 return 0;
1667 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
1668         if (!arg->hton) {
1669                 i = 0;
1670                 end = arg->size;
1671                 sub = 0;
1672                 add = 1;
1673         }
1674 #endif
1675         while (i != end) {
1676                 unsigned int shift = 0;
1677                 uint8_t *buf = (uint8_t *)dst + arg->offset + (i -= sub);
1678
1679                 for (shift = 0; arg->mask[i] >> shift; ++shift) {
1680                         if (!(arg->mask[i] & (1 << shift)))
1681                                 continue;
1682                         ++len;
1683                         if (!dst)
1684                                 continue;
1685                         *buf &= ~(1 << shift);
1686                         *buf |= (val & 1) << shift;
1687                         val >>= 1;
1688                 }
1689                 i += add;
1690         }
1691         return len;
1692 }
1693
1694 /** Compare a string with a partial one of a given length. */
1695 static int
1696 strcmp_partial(const char *full, const char *partial, size_t partial_len)
1697 {
1698         int r = strncmp(full, partial, partial_len);
1699
1700         if (r)
1701                 return r;
1702         if (strlen(full) <= partial_len)
1703                 return 0;
1704         return full[partial_len];
1705 }
1706
1707 /**
1708  * Parse a prefix length and generate a bit-mask.
1709  *
1710  * Last argument (ctx->args) is retrieved to determine mask size, storage
1711  * location and whether the result must use network byte ordering.
1712  */
1713 static int
1714 parse_prefix(struct context *ctx, const struct token *token,
1715              const char *str, unsigned int len,
1716              void *buf, unsigned int size)
1717 {
1718         const struct arg *arg = pop_args(ctx);
1719         static const uint8_t conv[] = "\x00\x80\xc0\xe0\xf0\xf8\xfc\xfe\xff";
1720         char *end;
1721         uintmax_t u;
1722         unsigned int bytes;
1723         unsigned int extra;
1724
1725         (void)token;
1726         /* Argument is expected. */
1727         if (!arg)
1728                 return -1;
1729         errno = 0;
1730         u = strtoumax(str, &end, 0);
1731         if (errno || (size_t)(end - str) != len)
1732                 goto error;
1733         if (arg->mask) {
1734                 uintmax_t v = 0;
1735
1736                 extra = arg_entry_bf_fill(NULL, 0, arg);
1737                 if (u > extra)
1738                         goto error;
1739                 if (!ctx->object)
1740                         return len;
1741                 extra -= u;
1742                 while (u--)
1743                         (v <<= 1, v |= 1);
1744                 v <<= extra;
1745                 if (!arg_entry_bf_fill(ctx->object, v, arg) ||
1746                     !arg_entry_bf_fill(ctx->objmask, -1, arg))
1747                         goto error;
1748                 return len;
1749         }
1750         bytes = u / 8;
1751         extra = u % 8;
1752         size = arg->size;
1753         if (bytes > size || bytes + !!extra > size)
1754                 goto error;
1755         if (!ctx->object)
1756                 return len;
1757         buf = (uint8_t *)ctx->object + arg->offset;
1758 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
1759         if (!arg->hton) {
1760                 memset((uint8_t *)buf + size - bytes, 0xff, bytes);
1761                 memset(buf, 0x00, size - bytes);
1762                 if (extra)
1763                         ((uint8_t *)buf)[size - bytes - 1] = conv[extra];
1764         } else
1765 #endif
1766         {
1767                 memset(buf, 0xff, bytes);
1768                 memset((uint8_t *)buf + bytes, 0x00, size - bytes);
1769                 if (extra)
1770                         ((uint8_t *)buf)[bytes] = conv[extra];
1771         }
1772         if (ctx->objmask)
1773                 memset((uint8_t *)ctx->objmask + arg->offset, 0xff, size);
1774         return len;
1775 error:
1776         push_args(ctx, arg);
1777         return -1;
1778 }
1779
1780 /** Default parsing function for token name matching. */
1781 static int
1782 parse_default(struct context *ctx, const struct token *token,
1783               const char *str, unsigned int len,
1784               void *buf, unsigned int size)
1785 {
1786         (void)ctx;
1787         (void)buf;
1788         (void)size;
1789         if (strcmp_partial(token->name, str, len))
1790                 return -1;
1791         return len;
1792 }
1793
1794 /** Parse flow command, initialize output buffer for subsequent tokens. */
1795 static int
1796 parse_init(struct context *ctx, const struct token *token,
1797            const char *str, unsigned int len,
1798            void *buf, unsigned int size)
1799 {
1800         struct buffer *out = buf;
1801
1802         /* Token name must match. */
1803         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
1804                 return -1;
1805         /* Nothing else to do if there is no buffer. */
1806         if (!out)
1807                 return len;
1808         /* Make sure buffer is large enough. */
1809         if (size < sizeof(*out))
1810                 return -1;
1811         /* Initialize buffer. */
1812         memset(out, 0x00, sizeof(*out));
1813         memset((uint8_t *)out + sizeof(*out), 0x22, size - sizeof(*out));
1814         ctx->objdata = 0;
1815         ctx->object = out;
1816         ctx->objmask = NULL;
1817         return len;
1818 }
1819
1820 /** Parse tokens for validate/create commands. */
1821 static int
1822 parse_vc(struct context *ctx, const struct token *token,
1823          const char *str, unsigned int len,
1824          void *buf, unsigned int size)
1825 {
1826         struct buffer *out = buf;
1827         uint8_t *data;
1828         uint32_t data_size;
1829
1830         /* Token name must match. */
1831         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
1832                 return -1;
1833         /* Nothing else to do if there is no buffer. */
1834         if (!out)
1835                 return len;
1836         if (!out->command) {
1837                 if (ctx->curr != VALIDATE && ctx->curr != CREATE)
1838                         return -1;
1839                 if (sizeof(*out) > size)
1840                         return -1;
1841                 out->command = ctx->curr;
1842                 ctx->objdata = 0;
1843                 ctx->object = out;
1844                 ctx->objmask = NULL;
1845                 out->args.vc.data = (uint8_t *)out + size;
1846                 return len;
1847         }
1848         ctx->objdata = 0;
1849         ctx->object = &out->args.vc.attr;
1850         ctx->objmask = NULL;
1851         switch (ctx->curr) {
1852         case GROUP:
1853         case PRIORITY:
1854                 return len;
1855         case INGRESS:
1856                 out->args.vc.attr.ingress = 1;
1857                 return len;
1858         case EGRESS:
1859                 out->args.vc.attr.egress = 1;
1860                 return len;
1861         case PATTERN:
1862                 out->args.vc.pattern =
1863                         (void *)RTE_ALIGN_CEIL((uintptr_t)(out + 1),
1864                                                sizeof(double));
1865                 ctx->object = out->args.vc.pattern;
1866                 ctx->objmask = NULL;
1867                 return len;
1868         case ACTIONS:
1869                 out->args.vc.actions =
1870                         (void *)RTE_ALIGN_CEIL((uintptr_t)
1871                                                (out->args.vc.pattern +
1872                                                 out->args.vc.pattern_n),
1873                                                sizeof(double));
1874                 ctx->object = out->args.vc.actions;
1875                 ctx->objmask = NULL;
1876                 return len;
1877         default:
1878                 if (!token->priv)
1879                         return -1;
1880                 break;
1881         }
1882         if (!out->args.vc.actions) {
1883                 const struct parse_item_priv *priv = token->priv;
1884                 struct rte_flow_item *item =
1885                         out->args.vc.pattern + out->args.vc.pattern_n;
1886
1887                 data_size = priv->size * 3; /* spec, last, mask */
1888                 data = (void *)RTE_ALIGN_FLOOR((uintptr_t)
1889                                                (out->args.vc.data - data_size),
1890                                                sizeof(double));
1891                 if ((uint8_t *)item + sizeof(*item) > data)
1892                         return -1;
1893                 *item = (struct rte_flow_item){
1894                         .type = priv->type,
1895                 };
1896                 ++out->args.vc.pattern_n;
1897                 ctx->object = item;
1898                 ctx->objmask = NULL;
1899         } else {
1900                 const struct parse_action_priv *priv = token->priv;
1901                 struct rte_flow_action *action =
1902                         out->args.vc.actions + out->args.vc.actions_n;
1903
1904                 data_size = priv->size; /* configuration */
1905                 data = (void *)RTE_ALIGN_FLOOR((uintptr_t)
1906                                                (out->args.vc.data - data_size),
1907                                                sizeof(double));
1908                 if ((uint8_t *)action + sizeof(*action) > data)
1909                         return -1;
1910                 *action = (struct rte_flow_action){
1911                         .type = priv->type,
1912                         .conf = data_size ? data : NULL,
1913                 };
1914                 ++out->args.vc.actions_n;
1915                 ctx->object = action;
1916                 ctx->objmask = NULL;
1917         }
1918         memset(data, 0, data_size);
1919         out->args.vc.data = data;
1920         ctx->objdata = data_size;
1921         return len;
1922 }
1923
1924 /** Parse pattern item parameter type. */
1925 static int
1926 parse_vc_spec(struct context *ctx, const struct token *token,
1927               const char *str, unsigned int len,
1928               void *buf, unsigned int size)
1929 {
1930         struct buffer *out = buf;
1931         struct rte_flow_item *item;
1932         uint32_t data_size;
1933         int index;
1934         int objmask = 0;
1935
1936         (void)size;
1937         /* Token name must match. */
1938         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
1939                 return -1;
1940         /* Parse parameter types. */
1941         switch (ctx->curr) {
1942                 static const enum index prefix[] = NEXT_ENTRY(PREFIX);
1943
1944         case ITEM_PARAM_IS:
1945                 index = 0;
1946                 objmask = 1;
1947                 break;
1948         case ITEM_PARAM_SPEC:
1949                 index = 0;
1950                 break;
1951         case ITEM_PARAM_LAST:
1952                 index = 1;
1953                 break;
1954         case ITEM_PARAM_PREFIX:
1955                 /* Modify next token to expect a prefix. */
1956                 if (ctx->next_num < 2)
1957                         return -1;
1958                 ctx->next[ctx->next_num - 2] = prefix;
1959                 /* Fall through. */
1960         case ITEM_PARAM_MASK:
1961                 index = 2;
1962                 break;
1963         default:
1964                 return -1;
1965         }
1966         /* Nothing else to do if there is no buffer. */
1967         if (!out)
1968                 return len;
1969         if (!out->args.vc.pattern_n)
1970                 return -1;
1971         item = &out->args.vc.pattern[out->args.vc.pattern_n - 1];
1972         data_size = ctx->objdata / 3; /* spec, last, mask */
1973         /* Point to selected object. */
1974         ctx->object = out->args.vc.data + (data_size * index);
1975         if (objmask) {
1976                 ctx->objmask = out->args.vc.data + (data_size * 2); /* mask */
1977                 item->mask = ctx->objmask;
1978         } else
1979                 ctx->objmask = NULL;
1980         /* Update relevant item pointer. */
1981         *((const void **[]){ &item->spec, &item->last, &item->mask })[index] =
1982                 ctx->object;
1983         return len;
1984 }
1985
1986 /** Parse action configuration field. */
1987 static int
1988 parse_vc_conf(struct context *ctx, const struct token *token,
1989               const char *str, unsigned int len,
1990               void *buf, unsigned int size)
1991 {
1992         struct buffer *out = buf;
1993
1994         (void)size;
1995         /* Token name must match. */
1996         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
1997                 return -1;
1998         /* Nothing else to do if there is no buffer. */
1999         if (!out)
2000                 return len;
2001         /* Point to selected object. */
2002         ctx->object = out->args.vc.data;
2003         ctx->objmask = NULL;
2004         return len;
2005 }
2006
2007 /**
2008  * Parse queue field for RSS action.
2009  *
2010  * Valid tokens are queue indices and the "end" token.
2011  */
2012 static int
2013 parse_vc_action_rss_queue(struct context *ctx, const struct token *token,
2014                           const char *str, unsigned int len,
2015                           void *buf, unsigned int size)
2016 {
2017         static const enum index next[] = NEXT_ENTRY(ACTION_RSS_QUEUE);
2018         int ret;
2019         int i;
2020
2021         (void)token;
2022         (void)buf;
2023         (void)size;
2024         if (ctx->curr != ACTION_RSS_QUEUE)
2025                 return -1;
2026         i = ctx->objdata >> 16;
2027         if (!strcmp_partial("end", str, len)) {
2028                 ctx->objdata &= 0xffff;
2029                 return len;
2030         }
2031         if (i >= ACTION_RSS_NUM)
2032                 return -1;
2033         if (push_args(ctx, ARGS_ENTRY(struct rte_flow_action_rss, queue[i])))
2034                 return -1;
2035         ret = parse_int(ctx, token, str, len, NULL, 0);
2036         if (ret < 0) {
2037                 pop_args(ctx);
2038                 return -1;
2039         }
2040         ++i;
2041         ctx->objdata = i << 16 | (ctx->objdata & 0xffff);
2042         /* Repeat token. */
2043         if (ctx->next_num == RTE_DIM(ctx->next))
2044                 return -1;
2045         ctx->next[ctx->next_num++] = next;
2046         if (!ctx->object)
2047                 return len;
2048         ((struct rte_flow_action_rss *)ctx->object)->num = i;
2049         return len;
2050 }
2051
2052 /** Parse tokens for destroy command. */
2053 static int
2054 parse_destroy(struct context *ctx, const struct token *token,
2055               const char *str, unsigned int len,
2056               void *buf, unsigned int size)
2057 {
2058         struct buffer *out = buf;
2059
2060         /* Token name must match. */
2061         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
2062                 return -1;
2063         /* Nothing else to do if there is no buffer. */
2064         if (!out)
2065                 return len;
2066         if (!out->command) {
2067                 if (ctx->curr != DESTROY)
2068                         return -1;
2069                 if (sizeof(*out) > size)
2070                         return -1;
2071                 out->command = ctx->curr;
2072                 ctx->objdata = 0;
2073                 ctx->object = out;
2074                 ctx->objmask = NULL;
2075                 out->args.destroy.rule =
2076                         (void *)RTE_ALIGN_CEIL((uintptr_t)(out + 1),
2077                                                sizeof(double));
2078                 return len;
2079         }
2080         if (((uint8_t *)(out->args.destroy.rule + out->args.destroy.rule_n) +
2081              sizeof(*out->args.destroy.rule)) > (uint8_t *)out + size)
2082                 return -1;
2083         ctx->objdata = 0;
2084         ctx->object = out->args.destroy.rule + out->args.destroy.rule_n++;
2085         ctx->objmask = NULL;
2086         return len;
2087 }
2088
2089 /** Parse tokens for flush command. */
2090 static int
2091 parse_flush(struct context *ctx, const struct token *token,
2092             const char *str, unsigned int len,
2093             void *buf, unsigned int size)
2094 {
2095         struct buffer *out = buf;
2096
2097         /* Token name must match. */
2098         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
2099                 return -1;
2100         /* Nothing else to do if there is no buffer. */
2101         if (!out)
2102                 return len;
2103         if (!out->command) {
2104                 if (ctx->curr != FLUSH)
2105                         return -1;
2106                 if (sizeof(*out) > size)
2107                         return -1;
2108                 out->command = ctx->curr;
2109                 ctx->objdata = 0;
2110                 ctx->object = out;
2111                 ctx->objmask = NULL;
2112         }
2113         return len;
2114 }
2115
2116 /** Parse tokens for query command. */
2117 static int
2118 parse_query(struct context *ctx, const struct token *token,
2119             const char *str, unsigned int len,
2120             void *buf, unsigned int size)
2121 {
2122         struct buffer *out = buf;
2123
2124         /* Token name must match. */
2125         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
2126                 return -1;
2127         /* Nothing else to do if there is no buffer. */
2128         if (!out)
2129                 return len;
2130         if (!out->command) {
2131                 if (ctx->curr != QUERY)
2132                         return -1;
2133                 if (sizeof(*out) > size)
2134                         return -1;
2135                 out->command = ctx->curr;
2136                 ctx->objdata = 0;
2137                 ctx->object = out;
2138                 ctx->objmask = NULL;
2139         }
2140         return len;
2141 }
2142
2143 /** Parse action names. */
2144 static int
2145 parse_action(struct context *ctx, const struct token *token,
2146              const char *str, unsigned int len,
2147              void *buf, unsigned int size)
2148 {
2149         struct buffer *out = buf;
2150         const struct arg *arg = pop_args(ctx);
2151         unsigned int i;
2152
2153         (void)size;
2154         /* Argument is expected. */
2155         if (!arg)
2156                 return -1;
2157         /* Parse action name. */
2158         for (i = 0; next_action[i]; ++i) {
2159                 const struct parse_action_priv *priv;
2160
2161                 token = &token_list[next_action[i]];
2162                 if (strcmp_partial(token->name, str, len))
2163                         continue;
2164                 priv = token->priv;
2165                 if (!priv)
2166                         goto error;
2167                 if (out)
2168                         memcpy((uint8_t *)ctx->object + arg->offset,
2169                                &priv->type,
2170                                arg->size);
2171                 return len;
2172         }
2173 error:
2174         push_args(ctx, arg);
2175         return -1;
2176 }
2177
2178 /** Parse tokens for list command. */
2179 static int
2180 parse_list(struct context *ctx, const struct token *token,
2181            const char *str, unsigned int len,
2182            void *buf, unsigned int size)
2183 {
2184         struct buffer *out = buf;
2185
2186         /* Token name must match. */
2187         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
2188                 return -1;
2189         /* Nothing else to do if there is no buffer. */
2190         if (!out)
2191                 return len;
2192         if (!out->command) {
2193                 if (ctx->curr != LIST)
2194                         return -1;
2195                 if (sizeof(*out) > size)
2196                         return -1;
2197                 out->command = ctx->curr;
2198                 ctx->objdata = 0;
2199                 ctx->object = out;
2200                 ctx->objmask = NULL;
2201                 out->args.list.group =
2202                         (void *)RTE_ALIGN_CEIL((uintptr_t)(out + 1),
2203                                                sizeof(double));
2204                 return len;
2205         }
2206         if (((uint8_t *)(out->args.list.group + out->args.list.group_n) +
2207              sizeof(*out->args.list.group)) > (uint8_t *)out + size)
2208                 return -1;
2209         ctx->objdata = 0;
2210         ctx->object = out->args.list.group + out->args.list.group_n++;
2211         ctx->objmask = NULL;
2212         return len;
2213 }
2214
2215 /** Parse tokens for isolate command. */
2216 static int
2217 parse_isolate(struct context *ctx, const struct token *token,
2218               const char *str, unsigned int len,
2219               void *buf, unsigned int size)
2220 {
2221         struct buffer *out = buf;
2222
2223         /* Token name must match. */
2224         if (parse_default(ctx, token, str, len, NULL, 0) < 0)
2225                 return -1;
2226         /* Nothing else to do if there is no buffer. */
2227         if (!out)
2228                 return len;
2229         if (!out->command) {
2230                 if (ctx->curr != ISOLATE)
2231                         return -1;
2232                 if (sizeof(*out) > size)
2233                         return -1;
2234                 out->command = ctx->curr;
2235                 ctx->objdata = 0;
2236                 ctx->object = out;
2237                 ctx->objmask = NULL;
2238         }
2239         return len;
2240 }
2241
2242 /**
2243  * Parse signed/unsigned integers 8 to 64-bit long.
2244  *
2245  * Last argument (ctx->args) is retrieved to determine integer type and
2246  * storage location.
2247  */
2248 static int
2249 parse_int(struct context *ctx, const struct token *token,
2250           const char *str, unsigned int len,
2251           void *buf, unsigned int size)
2252 {
2253         const struct arg *arg = pop_args(ctx);
2254         uintmax_t u;
2255         char *end;
2256
2257         (void)token;
2258         /* Argument is expected. */
2259         if (!arg)
2260                 return -1;
2261         errno = 0;
2262         u = arg->sign ?
2263                 (uintmax_t)strtoimax(str, &end, 0) :
2264                 strtoumax(str, &end, 0);
2265         if (errno || (size_t)(end - str) != len)
2266                 goto error;
2267         if (!ctx->object)
2268                 return len;
2269         if (arg->mask) {
2270                 if (!arg_entry_bf_fill(ctx->object, u, arg) ||
2271                     !arg_entry_bf_fill(ctx->objmask, -1, arg))
2272                         goto error;
2273                 return len;
2274         }
2275         buf = (uint8_t *)ctx->object + arg->offset;
2276         size = arg->size;
2277 objmask:
2278         switch (size) {
2279         case sizeof(uint8_t):
2280                 *(uint8_t *)buf = u;
2281                 break;
2282         case sizeof(uint16_t):
2283                 *(uint16_t *)buf = arg->hton ? rte_cpu_to_be_16(u) : u;
2284                 break;
2285         case sizeof(uint8_t [3]):
2286 #if RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
2287                 if (!arg->hton) {
2288                         ((uint8_t *)buf)[0] = u;
2289                         ((uint8_t *)buf)[1] = u >> 8;
2290                         ((uint8_t *)buf)[2] = u >> 16;
2291                         break;
2292                 }
2293 #endif
2294                 ((uint8_t *)buf)[0] = u >> 16;
2295                 ((uint8_t *)buf)[1] = u >> 8;
2296                 ((uint8_t *)buf)[2] = u;
2297                 break;
2298         case sizeof(uint32_t):
2299                 *(uint32_t *)buf = arg->hton ? rte_cpu_to_be_32(u) : u;
2300                 break;
2301         case sizeof(uint64_t):
2302                 *(uint64_t *)buf = arg->hton ? rte_cpu_to_be_64(u) : u;
2303                 break;
2304         default:
2305                 goto error;
2306         }
2307         if (ctx->objmask && buf != (uint8_t *)ctx->objmask + arg->offset) {
2308                 u = -1;
2309                 buf = (uint8_t *)ctx->objmask + arg->offset;
2310                 goto objmask;
2311         }
2312         return len;
2313 error:
2314         push_args(ctx, arg);
2315         return -1;
2316 }
2317
2318 /**
2319  * Parse a string.
2320  *
2321  * Two arguments (ctx->args) are retrieved from the stack to store data and
2322  * its length (in that order).
2323  */
2324 static int
2325 parse_string(struct context *ctx, const struct token *token,
2326              const char *str, unsigned int len,
2327              void *buf, unsigned int size)
2328 {
2329         const struct arg *arg_data = pop_args(ctx);
2330         const struct arg *arg_len = pop_args(ctx);
2331         char tmp[16]; /* Ought to be enough. */
2332         int ret;
2333
2334         /* Arguments are expected. */
2335         if (!arg_data)
2336                 return -1;
2337         if (!arg_len) {
2338                 push_args(ctx, arg_data);
2339                 return -1;
2340         }
2341         size = arg_data->size;
2342         /* Bit-mask fill is not supported. */
2343         if (arg_data->mask || size < len)
2344                 goto error;
2345         if (!ctx->object)
2346                 return len;
2347         /* Let parse_int() fill length information first. */
2348         ret = snprintf(tmp, sizeof(tmp), "%u", len);
2349         if (ret < 0)
2350                 goto error;
2351         push_args(ctx, arg_len);
2352         ret = parse_int(ctx, token, tmp, ret, NULL, 0);
2353         if (ret < 0) {
2354                 pop_args(ctx);
2355                 goto error;
2356         }
2357         buf = (uint8_t *)ctx->object + arg_data->offset;
2358         /* Output buffer is not necessarily NUL-terminated. */
2359         memcpy(buf, str, len);
2360         memset((uint8_t *)buf + len, 0x55, size - len);
2361         if (ctx->objmask)
2362                 memset((uint8_t *)ctx->objmask + arg_data->offset, 0xff, len);
2363         return len;
2364 error:
2365         push_args(ctx, arg_len);
2366         push_args(ctx, arg_data);
2367         return -1;
2368 }
2369
2370 /**
2371  * Parse a MAC address.
2372  *
2373  * Last argument (ctx->args) is retrieved to determine storage size and
2374  * location.
2375  */
2376 static int
2377 parse_mac_addr(struct context *ctx, const struct token *token,
2378                const char *str, unsigned int len,
2379                void *buf, unsigned int size)
2380 {
2381         const struct arg *arg = pop_args(ctx);
2382         struct ether_addr tmp;
2383         int ret;
2384
2385         (void)token;
2386         /* Argument is expected. */
2387         if (!arg)
2388                 return -1;
2389         size = arg->size;
2390         /* Bit-mask fill is not supported. */
2391         if (arg->mask || size != sizeof(tmp))
2392                 goto error;
2393         /* Only network endian is supported. */
2394         if (!arg->hton)
2395                 goto error;
2396         ret = cmdline_parse_etheraddr(NULL, str, &tmp, size);
2397         if (ret < 0 || (unsigned int)ret != len)
2398                 goto error;
2399         if (!ctx->object)
2400                 return len;
2401         buf = (uint8_t *)ctx->object + arg->offset;
2402         memcpy(buf, &tmp, size);
2403         if (ctx->objmask)
2404                 memset((uint8_t *)ctx->objmask + arg->offset, 0xff, size);
2405         return len;
2406 error:
2407         push_args(ctx, arg);
2408         return -1;
2409 }
2410
2411 /**
2412  * Parse an IPv4 address.
2413  *
2414  * Last argument (ctx->args) is retrieved to determine storage size and
2415  * location.
2416  */
2417 static int
2418 parse_ipv4_addr(struct context *ctx, const struct token *token,
2419                 const char *str, unsigned int len,
2420                 void *buf, unsigned int size)
2421 {
2422         const struct arg *arg = pop_args(ctx);
2423         char str2[len + 1];
2424         struct in_addr tmp;
2425         int ret;
2426
2427         /* Argument is expected. */
2428         if (!arg)
2429                 return -1;
2430         size = arg->size;
2431         /* Bit-mask fill is not supported. */
2432         if (arg->mask || size != sizeof(tmp))
2433                 goto error;
2434         /* Only network endian is supported. */
2435         if (!arg->hton)
2436                 goto error;
2437         memcpy(str2, str, len);
2438         str2[len] = '\0';
2439         ret = inet_pton(AF_INET, str2, &tmp);
2440         if (ret != 1) {
2441                 /* Attempt integer parsing. */
2442                 push_args(ctx, arg);
2443                 return parse_int(ctx, token, str, len, buf, size);
2444         }
2445         if (!ctx->object)
2446                 return len;
2447         buf = (uint8_t *)ctx->object + arg->offset;
2448         memcpy(buf, &tmp, size);
2449         if (ctx->objmask)
2450                 memset((uint8_t *)ctx->objmask + arg->offset, 0xff, size);
2451         return len;
2452 error:
2453         push_args(ctx, arg);
2454         return -1;
2455 }
2456
2457 /**
2458  * Parse an IPv6 address.
2459  *
2460  * Last argument (ctx->args) is retrieved to determine storage size and
2461  * location.
2462  */
2463 static int
2464 parse_ipv6_addr(struct context *ctx, const struct token *token,
2465                 const char *str, unsigned int len,
2466                 void *buf, unsigned int size)
2467 {
2468         const struct arg *arg = pop_args(ctx);
2469         char str2[len + 1];
2470         struct in6_addr tmp;
2471         int ret;
2472
2473         (void)token;
2474         /* Argument is expected. */
2475         if (!arg)
2476                 return -1;
2477         size = arg->size;
2478         /* Bit-mask fill is not supported. */
2479         if (arg->mask || size != sizeof(tmp))
2480                 goto error;
2481         /* Only network endian is supported. */
2482         if (!arg->hton)
2483                 goto error;
2484         memcpy(str2, str, len);
2485         str2[len] = '\0';
2486         ret = inet_pton(AF_INET6, str2, &tmp);
2487         if (ret != 1)
2488                 goto error;
2489         if (!ctx->object)
2490                 return len;
2491         buf = (uint8_t *)ctx->object + arg->offset;
2492         memcpy(buf, &tmp, size);
2493         if (ctx->objmask)
2494                 memset((uint8_t *)ctx->objmask + arg->offset, 0xff, size);
2495         return len;
2496 error:
2497         push_args(ctx, arg);
2498         return -1;
2499 }
2500
2501 /** Boolean values (even indices stand for false). */
2502 static const char *const boolean_name[] = {
2503         "0", "1",
2504         "false", "true",
2505         "no", "yes",
2506         "N", "Y",
2507         NULL,
2508 };
2509
2510 /**
2511  * Parse a boolean value.
2512  *
2513  * Last argument (ctx->args) is retrieved to determine storage size and
2514  * location.
2515  */
2516 static int
2517 parse_boolean(struct context *ctx, const struct token *token,
2518               const char *str, unsigned int len,
2519               void *buf, unsigned int size)
2520 {
2521         const struct arg *arg = pop_args(ctx);
2522         unsigned int i;
2523         int ret;
2524
2525         /* Argument is expected. */
2526         if (!arg)
2527                 return -1;
2528         for (i = 0; boolean_name[i]; ++i)
2529                 if (!strcmp_partial(boolean_name[i], str, len))
2530                         break;
2531         /* Process token as integer. */
2532         if (boolean_name[i])
2533                 str = i & 1 ? "1" : "0";
2534         push_args(ctx, arg);
2535         ret = parse_int(ctx, token, str, strlen(str), buf, size);
2536         return ret > 0 ? (int)len : ret;
2537 }
2538
2539 /** Parse port and update context. */
2540 static int
2541 parse_port(struct context *ctx, const struct token *token,
2542            const char *str, unsigned int len,
2543            void *buf, unsigned int size)
2544 {
2545         struct buffer *out = &(struct buffer){ .port = 0 };
2546         int ret;
2547
2548         if (buf)
2549                 out = buf;
2550         else {
2551                 ctx->objdata = 0;
2552                 ctx->object = out;
2553                 ctx->objmask = NULL;
2554                 size = sizeof(*out);
2555         }
2556         ret = parse_int(ctx, token, str, len, out, size);
2557         if (ret >= 0)
2558                 ctx->port = out->port;
2559         if (!buf)
2560                 ctx->object = NULL;
2561         return ret;
2562 }
2563
2564 /** No completion. */
2565 static int
2566 comp_none(struct context *ctx, const struct token *token,
2567           unsigned int ent, char *buf, unsigned int size)
2568 {
2569         (void)ctx;
2570         (void)token;
2571         (void)ent;
2572         (void)buf;
2573         (void)size;
2574         return 0;
2575 }
2576
2577 /** Complete boolean values. */
2578 static int
2579 comp_boolean(struct context *ctx, const struct token *token,
2580              unsigned int ent, char *buf, unsigned int size)
2581 {
2582         unsigned int i;
2583
2584         (void)ctx;
2585         (void)token;
2586         for (i = 0; boolean_name[i]; ++i)
2587                 if (buf && i == ent)
2588                         return snprintf(buf, size, "%s", boolean_name[i]);
2589         if (buf)
2590                 return -1;
2591         return i;
2592 }
2593
2594 /** Complete action names. */
2595 static int
2596 comp_action(struct context *ctx, const struct token *token,
2597             unsigned int ent, char *buf, unsigned int size)
2598 {
2599         unsigned int i;
2600
2601         (void)ctx;
2602         (void)token;
2603         for (i = 0; next_action[i]; ++i)
2604                 if (buf && i == ent)
2605                         return snprintf(buf, size, "%s",
2606                                         token_list[next_action[i]].name);
2607         if (buf)
2608                 return -1;
2609         return i;
2610 }
2611
2612 /** Complete available ports. */
2613 static int
2614 comp_port(struct context *ctx, const struct token *token,
2615           unsigned int ent, char *buf, unsigned int size)
2616 {
2617         unsigned int i = 0;
2618         portid_t p;
2619
2620         (void)ctx;
2621         (void)token;
2622         RTE_ETH_FOREACH_DEV(p) {
2623                 if (buf && i == ent)
2624                         return snprintf(buf, size, "%u", p);
2625                 ++i;
2626         }
2627         if (buf)
2628                 return -1;
2629         return i;
2630 }
2631
2632 /** Complete available rule IDs. */
2633 static int
2634 comp_rule_id(struct context *ctx, const struct token *token,
2635              unsigned int ent, char *buf, unsigned int size)
2636 {
2637         unsigned int i = 0;
2638         struct rte_port *port;
2639         struct port_flow *pf;
2640
2641         (void)token;
2642         if (port_id_is_invalid(ctx->port, DISABLED_WARN) ||
2643             ctx->port == (portid_t)RTE_PORT_ALL)
2644                 return -1;
2645         port = &ports[ctx->port];
2646         for (pf = port->flow_list; pf != NULL; pf = pf->next) {
2647                 if (buf && i == ent)
2648                         return snprintf(buf, size, "%u", pf->id);
2649                 ++i;
2650         }
2651         if (buf)
2652                 return -1;
2653         return i;
2654 }
2655
2656 /** Complete queue field for RSS action. */
2657 static int
2658 comp_vc_action_rss_queue(struct context *ctx, const struct token *token,
2659                          unsigned int ent, char *buf, unsigned int size)
2660 {
2661         (void)ctx;
2662         (void)token;
2663         if (!buf)
2664                 return nb_rxq + 1;
2665         if (ent < nb_rxq)
2666                 return snprintf(buf, size, "%u", ent);
2667         if (ent == nb_rxq)
2668                 return snprintf(buf, size, "end");
2669         return -1;
2670 }
2671
2672 /** Internal context. */
2673 static struct context cmd_flow_context;
2674
2675 /** Global parser instance (cmdline API). */
2676 cmdline_parse_inst_t cmd_flow;
2677
2678 /** Initialize context. */
2679 static void
2680 cmd_flow_context_init(struct context *ctx)
2681 {
2682         /* A full memset() is not necessary. */
2683         ctx->curr = ZERO;
2684         ctx->prev = ZERO;
2685         ctx->next_num = 0;
2686         ctx->args_num = 0;
2687         ctx->eol = 0;
2688         ctx->last = 0;
2689         ctx->port = 0;
2690         ctx->objdata = 0;
2691         ctx->object = NULL;
2692         ctx->objmask = NULL;
2693 }
2694
2695 /** Parse a token (cmdline API). */
2696 static int
2697 cmd_flow_parse(cmdline_parse_token_hdr_t *hdr, const char *src, void *result,
2698                unsigned int size)
2699 {
2700         struct context *ctx = &cmd_flow_context;
2701         const struct token *token;
2702         const enum index *list;
2703         int len;
2704         int i;
2705
2706         (void)hdr;
2707         token = &token_list[ctx->curr];
2708         /* Check argument length. */
2709         ctx->eol = 0;
2710         ctx->last = 1;
2711         for (len = 0; src[len]; ++len)
2712                 if (src[len] == '#' || isspace(src[len]))
2713                         break;
2714         if (!len)
2715                 return -1;
2716         /* Last argument and EOL detection. */
2717         for (i = len; src[i]; ++i)
2718                 if (src[i] == '#' || src[i] == '\r' || src[i] == '\n')
2719                         break;
2720                 else if (!isspace(src[i])) {
2721                         ctx->last = 0;
2722                         break;
2723                 }
2724         for (; src[i]; ++i)
2725                 if (src[i] == '\r' || src[i] == '\n') {
2726                         ctx->eol = 1;
2727                         break;
2728                 }
2729         /* Initialize context if necessary. */
2730         if (!ctx->next_num) {
2731                 if (!token->next)
2732                         return 0;
2733                 ctx->next[ctx->next_num++] = token->next[0];
2734         }
2735         /* Process argument through candidates. */
2736         ctx->prev = ctx->curr;
2737         list = ctx->next[ctx->next_num - 1];
2738         for (i = 0; list[i]; ++i) {
2739                 const struct token *next = &token_list[list[i]];
2740                 int tmp;
2741
2742                 ctx->curr = list[i];
2743                 if (next->call)
2744                         tmp = next->call(ctx, next, src, len, result, size);
2745                 else
2746                         tmp = parse_default(ctx, next, src, len, result, size);
2747                 if (tmp == -1 || tmp != len)
2748                         continue;
2749                 token = next;
2750                 break;
2751         }
2752         if (!list[i])
2753                 return -1;
2754         --ctx->next_num;
2755         /* Push subsequent tokens if any. */
2756         if (token->next)
2757                 for (i = 0; token->next[i]; ++i) {
2758                         if (ctx->next_num == RTE_DIM(ctx->next))
2759                                 return -1;
2760                         ctx->next[ctx->next_num++] = token->next[i];
2761                 }
2762         /* Push arguments if any. */
2763         if (token->args)
2764                 for (i = 0; token->args[i]; ++i) {
2765                         if (ctx->args_num == RTE_DIM(ctx->args))
2766                                 return -1;
2767                         ctx->args[ctx->args_num++] = token->args[i];
2768                 }
2769         return len;
2770 }
2771
2772 /** Return number of completion entries (cmdline API). */
2773 static int
2774 cmd_flow_complete_get_nb(cmdline_parse_token_hdr_t *hdr)
2775 {
2776         struct context *ctx = &cmd_flow_context;
2777         const struct token *token = &token_list[ctx->curr];
2778         const enum index *list;
2779         int i;
2780
2781         (void)hdr;
2782         /* Count number of tokens in current list. */
2783         if (ctx->next_num)
2784                 list = ctx->next[ctx->next_num - 1];
2785         else
2786                 list = token->next[0];
2787         for (i = 0; list[i]; ++i)
2788                 ;
2789         if (!i)
2790                 return 0;
2791         /*
2792          * If there is a single token, use its completion callback, otherwise
2793          * return the number of entries.
2794          */
2795         token = &token_list[list[0]];
2796         if (i == 1 && token->comp) {
2797                 /* Save index for cmd_flow_get_help(). */
2798                 ctx->prev = list[0];
2799                 return token->comp(ctx, token, 0, NULL, 0);
2800         }
2801         return i;
2802 }
2803
2804 /** Return a completion entry (cmdline API). */
2805 static int
2806 cmd_flow_complete_get_elt(cmdline_parse_token_hdr_t *hdr, int index,
2807                           char *dst, unsigned int size)
2808 {
2809         struct context *ctx = &cmd_flow_context;
2810         const struct token *token = &token_list[ctx->curr];
2811         const enum index *list;
2812         int i;
2813
2814         (void)hdr;
2815         /* Count number of tokens in current list. */
2816         if (ctx->next_num)
2817                 list = ctx->next[ctx->next_num - 1];
2818         else
2819                 list = token->next[0];
2820         for (i = 0; list[i]; ++i)
2821                 ;
2822         if (!i)
2823                 return -1;
2824         /* If there is a single token, use its completion callback. */
2825         token = &token_list[list[0]];
2826         if (i == 1 && token->comp) {
2827                 /* Save index for cmd_flow_get_help(). */
2828                 ctx->prev = list[0];
2829                 return token->comp(ctx, token, index, dst, size) < 0 ? -1 : 0;
2830         }
2831         /* Otherwise make sure the index is valid and use defaults. */
2832         if (index >= i)
2833                 return -1;
2834         token = &token_list[list[index]];
2835         snprintf(dst, size, "%s", token->name);
2836         /* Save index for cmd_flow_get_help(). */
2837         ctx->prev = list[index];
2838         return 0;
2839 }
2840
2841 /** Populate help strings for current token (cmdline API). */
2842 static int
2843 cmd_flow_get_help(cmdline_parse_token_hdr_t *hdr, char *dst, unsigned int size)
2844 {
2845         struct context *ctx = &cmd_flow_context;
2846         const struct token *token = &token_list[ctx->prev];
2847
2848         (void)hdr;
2849         if (!size)
2850                 return -1;
2851         /* Set token type and update global help with details. */
2852         snprintf(dst, size, "%s", (token->type ? token->type : "TOKEN"));
2853         if (token->help)
2854                 cmd_flow.help_str = token->help;
2855         else
2856                 cmd_flow.help_str = token->name;
2857         return 0;
2858 }
2859
2860 /** Token definition template (cmdline API). */
2861 static struct cmdline_token_hdr cmd_flow_token_hdr = {
2862         .ops = &(struct cmdline_token_ops){
2863                 .parse = cmd_flow_parse,
2864                 .complete_get_nb = cmd_flow_complete_get_nb,
2865                 .complete_get_elt = cmd_flow_complete_get_elt,
2866                 .get_help = cmd_flow_get_help,
2867         },
2868         .offset = 0,
2869 };
2870
2871 /** Populate the next dynamic token. */
2872 static void
2873 cmd_flow_tok(cmdline_parse_token_hdr_t **hdr,
2874              cmdline_parse_token_hdr_t **hdr_inst)
2875 {
2876         struct context *ctx = &cmd_flow_context;
2877
2878         /* Always reinitialize context before requesting the first token. */
2879         if (!(hdr_inst - cmd_flow.tokens))
2880                 cmd_flow_context_init(ctx);
2881         /* Return NULL when no more tokens are expected. */
2882         if (!ctx->next_num && ctx->curr) {
2883                 *hdr = NULL;
2884                 return;
2885         }
2886         /* Determine if command should end here. */
2887         if (ctx->eol && ctx->last && ctx->next_num) {
2888                 const enum index *list = ctx->next[ctx->next_num - 1];
2889                 int i;
2890
2891                 for (i = 0; list[i]; ++i) {
2892                         if (list[i] != END)
2893                                 continue;
2894                         *hdr = NULL;
2895                         return;
2896                 }
2897         }
2898         *hdr = &cmd_flow_token_hdr;
2899 }
2900
2901 /** Dispatch parsed buffer to function calls. */
2902 static void
2903 cmd_flow_parsed(const struct buffer *in)
2904 {
2905         switch (in->command) {
2906         case VALIDATE:
2907                 port_flow_validate(in->port, &in->args.vc.attr,
2908                                    in->args.vc.pattern, in->args.vc.actions);
2909                 break;
2910         case CREATE:
2911                 port_flow_create(in->port, &in->args.vc.attr,
2912                                  in->args.vc.pattern, in->args.vc.actions);
2913                 break;
2914         case DESTROY:
2915                 port_flow_destroy(in->port, in->args.destroy.rule_n,
2916                                   in->args.destroy.rule);
2917                 break;
2918         case FLUSH:
2919                 port_flow_flush(in->port);
2920                 break;
2921         case QUERY:
2922                 port_flow_query(in->port, in->args.query.rule,
2923                                 in->args.query.action);
2924                 break;
2925         case LIST:
2926                 port_flow_list(in->port, in->args.list.group_n,
2927                                in->args.list.group);
2928                 break;
2929         case ISOLATE:
2930                 port_flow_isolate(in->port, in->args.isolate.set);
2931                 break;
2932         default:
2933                 break;
2934         }
2935 }
2936
2937 /** Token generator and output processing callback (cmdline API). */
2938 static void
2939 cmd_flow_cb(void *arg0, struct cmdline *cl, void *arg2)
2940 {
2941         if (cl == NULL)
2942                 cmd_flow_tok(arg0, arg2);
2943         else
2944                 cmd_flow_parsed(arg0);
2945 }
2946
2947 /** Global parser instance (cmdline API). */
2948 cmdline_parse_inst_t cmd_flow = {
2949         .f = cmd_flow_cb,
2950         .data = NULL, /**< Unused. */
2951         .help_str = NULL, /**< Updated by cmd_flow_get_help(). */
2952         .tokens = {
2953                 NULL,
2954         }, /**< Tokens are returned by cmd_flow_tok(). */
2955 };