The Tcpdump Group git mirrors - libpcap/blob - grammar.y.in

   1 /*
   2  * We want a reentrant parser.
   3  */
   4 @REENTRANT_PARSER@
   5
   6 /*
   7  * We also want a reentrant scanner, so we have to pass the
   8  * handle for the reentrant scanner to the parser, and the
   9  * parser has to pass it to the lexical analyzer.
  10  *
  11  * We use void * rather than yyscan_t because, at least with some
  12  * versions of Flex and Bison, if you use yyscan_t in %parse-param and
  13  * %lex-param, you have to include scanner.h before grammar.h to get
  14  * yyscan_t declared, and you have to include grammar.h before scanner.h
  15  * to get YYSTYPE declared.  Using void * breaks the cycle; the Flex
  16  * documentation says yyscan_t is just a void *.
  17  */
  18 %parse-param   {void *yyscanner}
  19 %lex-param   {void *yyscanner}
  20
  21 /*
  22  * According to bison documentation, shift/reduce conflicts are not an issue
  23  * in most parsers as long as the number does not evolve over time:
  24  * https://www.gnu.org/software/bison/manual/html_node/Expect-Decl.html
  25  * So, following the advice use %expect to check the amount of shift/reduce
  26  * warnings.
  27  *
  28  * This doesn't appear to work in Berkeley YACC - 1.9 20170709; it still
  29  * warns of 38 shift/reduce conflicts.
  30  *
  31  * The Berkeley YACC documentation:
  32  *
  33  *    https://invisible-island.net/byacc/manpage/yacc.html
  34  *
  35  * claims that "Bison's support for "%expect" is broken in more than one
  36  * release.", but doesn't give details.  Hopefully, that only means that
  37  * you get warnings even if you have the expected number of shift/reduce
  38  * conflicts, not that anything else fails.
  39  */
  40 %expect 38
  41
  42 /*
  43  * And we need to pass the compiler state to the scanner.
  44  */
  45 %parse-param { compiler_state_t *cstate }
  46
  47 %{
  48 /*
  49  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
  50  *      The Regents of the University of California.  All rights reserved.
  51  *
  52  * Redistribution and use in source and binary forms, with or without
  53  * modification, are permitted provided that: (1) source code distributions
  54  * retain the above copyright notice and this paragraph in its entirety, (2)
  55  * distributions including binary code include the above copyright notice and
  56  * this paragraph in its entirety in the documentation or other materials
  57  * provided with the distribution, and (3) all advertising materials mentioning
  58  * features or use of this software display the following acknowledgement:
  59  * ``This product includes software developed by the University of California,
  60  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  61  * the University nor the names of its contributors may be used to endorse
  62  * or promote products derived from this software without specific prior
  63  * written permission.
  64  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  65  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  66  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  67  *
  68  */
  69
  70 #ifdef HAVE_CONFIG_H
  71 #include <config.h>
  72 #endif
  73
  74 /*
  75  * grammar.h requires gencode.h and sometimes breaks in a polluted namespace
  76  * (see ftmacros.h), so include it early.
  77  */
  78 #include "gencode.h"
  79 #include "grammar.h"
  80
  81 #include <stdlib.h>
  82
  83 #ifndef _WIN32
  84 #include <sys/types.h>
  85 #include <sys/socket.h>
  86
  87 #if __STDC__
  88 struct mbuf;
  89 struct rtentry;
  90 #endif
  91
  92 #include <netinet/in.h>
  93 #include <arpa/inet.h>
  94 #endif /* _WIN32 */
  95
  96 #include <stdio.h>
  97
  98 #include "diag-control.h"
  99
 100 #include "pcap-int.h"
 101
 102 #include "scanner.h"
 103
 104 #include "llc.h"
 105 #include "ieee80211.h"
 106 #include "pflog.h"
 107 #include <pcap/namedb.h>
 108
 109 #ifdef HAVE_OS_PROTO_H
 110 #include "os-proto.h"
 111 #endif
 112
 113 #ifdef YYBYACC
 114 /*
 115  * Both Berkeley YACC and Bison define yydebug (under whatever name
 116  * it has) as a global, but Bison does so only if YYDEBUG is defined.
 117  * Berkeley YACC define it even if YYDEBUG isn't defined; declare it
 118  * here to suppress a warning.
 119  */
 120 #if !defined(YYDEBUG)
 121 extern int yydebug;
 122 #endif
 123
 124 /*
 125  * In Berkeley YACC, yynerrs (under whatever name it has) is global,
 126  * even if it's building a reentrant parser.  In Bison, it's local
 127  * in reentrant parsers.
 128  *
 129  * Declare it to squelch a warning.
 130  */
 131 extern int yynerrs;
 132 #endif
 133
 134 #define QSET(q, p, d, a) (q).proto = (unsigned char)(p),\
 135                          (q).dir = (unsigned char)(d),\
 136                          (q).addr = (unsigned char)(a)
 137
 138 struct tok {
 139         int v;                  /* value */
 140         const char *s;          /* string */
 141 };
 142
 143 static const struct tok ieee80211_types[] = {
 144         { IEEE80211_FC0_TYPE_DATA, "data" },
 145         { IEEE80211_FC0_TYPE_MGT, "mgt" },
 146         { IEEE80211_FC0_TYPE_MGT, "management" },
 147         { IEEE80211_FC0_TYPE_CTL, "ctl" },
 148         { IEEE80211_FC0_TYPE_CTL, "control" },
 149         { 0, NULL }
 150 };
 151 static const struct tok ieee80211_mgt_subtypes[] = {
 152         { IEEE80211_FC0_SUBTYPE_ASSOC_REQ, "assocreq" },
 153         { IEEE80211_FC0_SUBTYPE_ASSOC_REQ, "assoc-req" },
 154         { IEEE80211_FC0_SUBTYPE_ASSOC_RESP, "assocresp" },
 155         { IEEE80211_FC0_SUBTYPE_ASSOC_RESP, "assoc-resp" },
 156         { IEEE80211_FC0_SUBTYPE_REASSOC_REQ, "reassocreq" },
 157         { IEEE80211_FC0_SUBTYPE_REASSOC_REQ, "reassoc-req" },
 158         { IEEE80211_FC0_SUBTYPE_REASSOC_RESP, "reassocresp" },
 159         { IEEE80211_FC0_SUBTYPE_REASSOC_RESP, "reassoc-resp" },
 160         { IEEE80211_FC0_SUBTYPE_PROBE_REQ, "probereq" },
 161         { IEEE80211_FC0_SUBTYPE_PROBE_REQ, "probe-req" },
 162         { IEEE80211_FC0_SUBTYPE_PROBE_RESP, "proberesp" },
 163         { IEEE80211_FC0_SUBTYPE_PROBE_RESP, "probe-resp" },
 164         { IEEE80211_FC0_SUBTYPE_BEACON, "beacon" },
 165         { IEEE80211_FC0_SUBTYPE_ATIM, "atim" },
 166         { IEEE80211_FC0_SUBTYPE_DISASSOC, "disassoc" },
 167         { IEEE80211_FC0_SUBTYPE_DISASSOC, "disassociation" },
 168         { IEEE80211_FC0_SUBTYPE_AUTH, "auth" },
 169         { IEEE80211_FC0_SUBTYPE_AUTH, "authentication" },
 170         { IEEE80211_FC0_SUBTYPE_DEAUTH, "deauth" },
 171         { IEEE80211_FC0_SUBTYPE_DEAUTH, "deauthentication" },
 172         { 0, NULL }
 173 };
 174 static const struct tok ieee80211_ctl_subtypes[] = {
 175         { IEEE80211_FC0_SUBTYPE_PS_POLL, "ps-poll" },
 176         { IEEE80211_FC0_SUBTYPE_RTS, "rts" },
 177         { IEEE80211_FC0_SUBTYPE_CTS, "cts" },
 178         { IEEE80211_FC0_SUBTYPE_ACK, "ack" },
 179         { IEEE80211_FC0_SUBTYPE_CF_END, "cf-end" },
 180         { IEEE80211_FC0_SUBTYPE_CF_END_ACK, "cf-end-ack" },
 181         { 0, NULL }
 182 };
 183 static const struct tok ieee80211_data_subtypes[] = {
 184         { IEEE80211_FC0_SUBTYPE_DATA, "data" },
 185         { IEEE80211_FC0_SUBTYPE_CF_ACK, "data-cf-ack" },
 186         { IEEE80211_FC0_SUBTYPE_CF_POLL, "data-cf-poll" },
 187         { IEEE80211_FC0_SUBTYPE_CF_ACPL, "data-cf-ack-poll" },
 188         { IEEE80211_FC0_SUBTYPE_NODATA, "null" },
 189         { IEEE80211_FC0_SUBTYPE_NODATA_CF_ACK, "cf-ack" },
 190         { IEEE80211_FC0_SUBTYPE_NODATA_CF_POLL, "cf-poll"  },
 191         { IEEE80211_FC0_SUBTYPE_NODATA_CF_ACPL, "cf-ack-poll" },
 192         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_DATA, "qos-data" },
 193         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_CF_ACK, "qos-data-cf-ack" },
 194         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_CF_POLL, "qos-data-cf-poll" },
 195         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_CF_ACPL, "qos-data-cf-ack-poll" },
 196         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_NODATA, "qos" },
 197         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_NODATA_CF_POLL, "qos-cf-poll" },
 198         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_NODATA_CF_ACPL, "qos-cf-ack-poll" },
 199         { 0, NULL }
 200 };
 201 static const struct tok llc_s_subtypes[] = {
 202         { LLC_RR, "rr" },
 203         { LLC_RNR, "rnr" },
 204         { LLC_REJ, "rej" },
 205         { 0, NULL }
 206 };
 207 static const struct tok llc_u_subtypes[] = {
 208         { LLC_UI, "ui" },
 209         { LLC_UA, "ua" },
 210         { LLC_DISC, "disc" },
 211         { LLC_DM, "dm" },
 212         { LLC_SABME, "sabme" },
 213         { LLC_TEST, "test" },
 214         { LLC_XID, "xid" },
 215         { LLC_FRMR, "frmr" },
 216         { 0, NULL }
 217 };
 218 struct type2tok {
 219         int type;
 220         const struct tok *tok;
 221 };
 222 static const struct type2tok ieee80211_type_subtypes[] = {
 223         { IEEE80211_FC0_TYPE_MGT, ieee80211_mgt_subtypes },
 224         { IEEE80211_FC0_TYPE_CTL, ieee80211_ctl_subtypes },
 225         { IEEE80211_FC0_TYPE_DATA, ieee80211_data_subtypes },
 226         { 0, NULL }
 227 };
 228
 229 static int
 230 str2tok(const char *str, const struct tok *toks)
 231 {
 232         int i;
 233
 234         for (i = 0; toks[i].s != NULL; i++) {
 235                 if (pcap_strcasecmp(toks[i].s, str) == 0) {
 236                         /*
 237                          * Just in case somebody is using this to
 238                          * generate values of -1/0xFFFFFFFF.
 239                          * That won't work, as it's indistinguishable
 240                          * from an error.
 241                          */
 242                         if (toks[i].v == -1)
 243                                 abort();
 244                         return (toks[i].v);
 245                 }
 246         }
 247         return (-1);
 248 }
 249
 250 static const struct qual qerr = { Q_UNDEF, Q_UNDEF, Q_UNDEF, Q_UNDEF };
 251
 252 static void
 253 yyerror(void *yyscanner _U_, compiler_state_t *cstate, const char *msg)
 254 {
 255         bpf_set_error(cstate, "can't parse filter expression: %s", msg);
 256 }
 257
 258 static const struct tok pflog_reasons[] = {
 259         { PFRES_MATCH,          "match" },
 260         { PFRES_BADOFF,         "bad-offset" },
 261         { PFRES_FRAG,           "fragment" },
 262         { PFRES_SHORT,          "short" },
 263         { PFRES_NORM,           "normalize" },
 264         { PFRES_MEMORY,         "memory" },
 265         { PFRES_TS,             "bad-timestamp" },
 266         { PFRES_CONGEST,        "congestion" },
 267         { PFRES_IPOPTIONS,      "ip-option" },
 268         { PFRES_PROTCKSUM,      "proto-cksum" },
 269         { PFRES_BADSTATE,       "state-mismatch" },
 270         { PFRES_STATEINS,       "state-insert" },
 271         { PFRES_MAXSTATES,      "state-limit" },
 272         { PFRES_SRCLIMIT,       "src-limit" },
 273         { PFRES_SYNPROXY,       "synproxy" },
 274 #if defined(__FreeBSD__)
 275         { PFRES_MAPFAILED,      "map-failed" },
 276 #elif defined(__NetBSD__)
 277         { PFRES_STATELOCKED,    "state-locked" },
 278 #elif defined(__OpenBSD__)
 279         { PFRES_TRANSLATE,      "translate" },
 280         { PFRES_NOROUTE,        "no-route" },
 281 #elif defined(__APPLE__)
 282         { PFRES_DUMMYNET,       "dummynet" },
 283 #endif
 284         { 0, NULL }
 285 };
 286
 287 static int
 288 pfreason_to_num(compiler_state_t *cstate, const char *reason)
 289 {
 290         int i;
 291
 292         i = str2tok(reason, pflog_reasons);
 293         if (i == -1)
 294                 bpf_set_error(cstate, "unknown PF reason \"%s\"", reason);
 295         return (i);
 296 }
 297
 298 static const struct tok pflog_actions[] = {
 299         { PF_PASS,              "pass" },
 300         { PF_PASS,              "accept" },     /* alias for "pass" */
 301         { PF_DROP,              "drop" },
 302         { PF_DROP,              "block" },      /* alias for "drop" */
 303         { PF_SCRUB,             "scrub" },
 304         { PF_NOSCRUB,           "noscrub" },
 305         { PF_NAT,               "nat" },
 306         { PF_NONAT,             "nonat" },
 307         { PF_BINAT,             "binat" },
 308         { PF_NOBINAT,           "nobinat" },
 309         { PF_RDR,               "rdr" },
 310         { PF_NORDR,             "nordr" },
 311         { PF_SYNPROXY_DROP,     "synproxy-drop" },
 312 #if defined(__FreeBSD__)
 313         { PF_DEFER,             "defer" },
 314 #elif defined(__OpenBSD__)
 315         { PF_DEFER,             "defer" },
 316         { PF_MATCH,             "match" },
 317         { PF_DIVERT,            "divert" },
 318         { PF_RT,                "rt" },
 319         { PF_AFRT,              "afrt" },
 320 #elif defined(__APPLE__)
 321         { PF_DUMMYNET,          "dummynet" },
 322         { PF_NODUMMYNET,        "nodummynet" },
 323         { PF_NAT64,             "nat64" },
 324         { PF_NONAT64,           "nonat64" },
 325 #endif
 326         { 0, NULL },
 327 };
 328
 329 static int
 330 pfaction_to_num(compiler_state_t *cstate, const char *action)
 331 {
 332         int i;
 333
 334         i = str2tok(action, pflog_actions);
 335         if (i == -1)
 336                 bpf_set_error(cstate, "unknown PF action \"%s\"", action);
 337         return (i);
 338 }
 339
 340 /*
 341  * For calls that might return an "an error occurred" value.
 342  */
 343 #define CHECK_INT_VAL(val)      if (val == -1) YYABORT
 344 #define CHECK_PTR_VAL(val)      if (val == NULL) YYABORT
 345
 346 DIAG_OFF_BISON_BYACC
 347 %}
 348
 349 %union {
 350         int i;
 351         bpf_u_int32 h;
 352         char *s;
 353         struct stmt *stmt;
 354         struct arth *a;
 355         struct {
 356                 struct qual q;
 357                 int atmfieldtype;
 358                 int mtp3fieldtype;
 359                 struct block *b;
 360         } blk;
 361         struct block *rblk;
 362 }
 363
 364 %type   <blk>   expr id nid pid term rterm qid
 365 %type   <blk>   head
 366 %type   <i>     pqual dqual aqual ndaqual
 367 %type   <a>     arth narth
 368 %type   <i>     byteop pname relop irelop
 369 %type   <h>     pnum
 370 %type   <blk>   and or paren not null prog
 371 %type   <rblk>  other pfvar p80211 pllc
 372 %type   <i>     atmtype atmmultitype
 373 %type   <blk>   atmfield
 374 %type   <blk>   atmfieldvalue atmvalue atmlistvalue
 375 %type   <i>     mtp2type
 376 %type   <blk>   mtp3field
 377 %type   <blk>   mtp3fieldvalue mtp3value mtp3listvalue
 378
 379
 380 %token  DST SRC HOST GATEWAY
 381 %token  NET NETMASK PORT PORTRANGE LESS GREATER PROTO PROTOCHAIN CBYTE
 382 %token  ARP RARP IP SCTP TCP UDP ICMP IGMP IGRP PIM VRRP CARP
 383 %token  ATALK AARP DECNET LAT SCA MOPRC MOPDL
 384 %token  TK_BROADCAST TK_MULTICAST
 385 %token  NUM INBOUND OUTBOUND
 386 %token  IFINDEX
 387 %token  PF_IFNAME PF_RSET PF_RNR PF_SRNR PF_REASON PF_ACTION
 388 %token  TYPE SUBTYPE DIR ADDR1 ADDR2 ADDR3 ADDR4 RA TA
 389 %token  LINK
 390 %token  GEQ LEQ NEQ
 391 %token  ID EID HID HID6 AID
 392 %token  LSH RSH
 393 %token  LEN
 394 %token  IPV6 ICMPV6 AH ESP
 395 %token  VLAN MPLS
 396 %token  PPPOED PPPOES GENEVE
 397 %token  ISO ESIS CLNP ISIS L1 L2 IIH LSP SNP CSNP PSNP
 398 %token  STP
 399 %token  IPX
 400 %token  NETBEUI
 401 %token  LANE LLC METAC BCC SC ILMIC OAMF4EC OAMF4SC
 402 %token  OAM OAMF4 CONNECTMSG METACONNECT
 403 %token  VPI VCI
 404 %token  RADIO
 405 %token  FISU LSSU MSU HFISU HLSSU HMSU
 406 %token  SIO OPC DPC SLS HSIO HOPC HDPC HSLS
 407 %token  LEX_ERROR
 408
 409 %type   <s> ID EID AID
 410 %type   <s> HID HID6
 411 %type   <h> NUM
 412 %type   <i> action reason type subtype type_subtype dir
 413
 414 %left OR AND
 415 %nonassoc  '!'
 416 %left '|'
 417 %left '&'
 418 %left LSH RSH
 419 %left '+' '-'
 420 %left '*' '/'
 421 %nonassoc UMINUS
 422 %%
 423 prog:     null expr
 424 {
 425         CHECK_INT_VAL(finish_parse(cstate, $2.b));
 426 }
 427         | null
 428         ;
 429 null:     /* null */            { $$.q = qerr; }
 430         ;
 431 expr:     term
 432         | expr and term         { gen_and($1.b, $3.b); $$ = $3; }
 433         | expr and id           { gen_and($1.b, $3.b); $$ = $3; }
 434         | expr or term          { gen_or($1.b, $3.b); $$ = $3; }
 435         | expr or id            { gen_or($1.b, $3.b); $$ = $3; }
 436         ;
 437 and:      AND                   { $$ = $<blk>0; }
 438         ;
 439 or:       OR                    { $$ = $<blk>0; }
 440         ;
 441 id:       nid
 442         | pnum                  { CHECK_PTR_VAL(($$.b = gen_ncode(cstate, NULL, $1,
 443                                                    $$.q = $<blk>0.q))); }
 444         | paren pid ')'         { $$ = $2; }
 445         ;
 446 nid:      ID                    { CHECK_PTR_VAL($1); CHECK_PTR_VAL(($$.b = gen_scode(cstate, $1, $$.q = $<blk>0.q))); }
 447         | HID '/' NUM           { CHECK_PTR_VAL($1); CHECK_PTR_VAL(($$.b = gen_mcode(cstate, $1, NULL, $3,
 448                                     $$.q = $<blk>0.q))); }
 449         | HID NETMASK HID       { CHECK_PTR_VAL($1); CHECK_PTR_VAL(($$.b = gen_mcode(cstate, $1, $3, 0,
 450                                     $$.q = $<blk>0.q))); }
 451         | HID                   {
 452                                   CHECK_PTR_VAL($1);
 453                                   /* Decide how to parse HID based on proto */
 454                                   $$.q = $<blk>0.q;
 455                                   if ($$.q.addr == Q_PORT) {
 456                                         bpf_set_error(cstate, "'port' modifier applied to ip host");
 457                                         YYABORT;
 458                                   } else if ($$.q.addr == Q_PORTRANGE) {
 459                                         bpf_set_error(cstate, "'portrange' modifier applied to ip host");
 460                                         YYABORT;
 461                                   } else if ($$.q.addr == Q_PROTO) {
 462                                         bpf_set_error(cstate, "'proto' modifier applied to ip host");
 463                                         YYABORT;
 464                                   } else if ($$.q.addr == Q_PROTOCHAIN) {
 465                                         bpf_set_error(cstate, "'protochain' modifier applied to ip host");
 466                                         YYABORT;
 467                                   }
 468                                   CHECK_PTR_VAL(($$.b = gen_ncode(cstate, $1, 0, $$.q)));
 469                                 }
 470         | HID6 '/' NUM          {
 471                                   CHECK_PTR_VAL($1);
 472 #ifdef INET6
 473                                   CHECK_PTR_VAL(($$.b = gen_mcode6(cstate, $1, NULL, $3,
 474                                     $$.q = $<blk>0.q)));
 475 #else
 476                                   bpf_set_error(cstate, "'ip6addr/prefixlen' not supported "
 477                                         "in this configuration");
 478                                   YYABORT;
 479 #endif /*INET6*/
 480                                 }
 481         | HID6                  {
 482                                   CHECK_PTR_VAL($1);
 483 #ifdef INET6
 484                                   CHECK_PTR_VAL(($$.b = gen_mcode6(cstate, $1, 0, 128,
 485                                     $$.q = $<blk>0.q)));
 486 #else
 487                                   bpf_set_error(cstate, "'ip6addr' not supported "
 488                                         "in this configuration");
 489                                   YYABORT;
 490 #endif /*INET6*/
 491                                 }
 492         | EID                   { CHECK_PTR_VAL($1); CHECK_PTR_VAL(($$.b = gen_ecode(cstate, $1, $$.q = $<blk>0.q))); }
 493         | AID                   { CHECK_PTR_VAL($1); CHECK_PTR_VAL(($$.b = gen_acode(cstate, $1, $$.q = $<blk>0.q))); }
 494         | not id                { gen_not($2.b); $$ = $2; }
 495         ;
 496 not:      '!'                   { $$ = $<blk>0; }
 497         ;
 498 paren:    '('                   { $$ = $<blk>0; }
 499         ;
 500 pid:      nid
 501         | qid and id            { gen_and($1.b, $3.b); $$ = $3; }
 502         | qid or id             { gen_or($1.b, $3.b); $$ = $3; }
 503         ;
 504 qid:      pnum                  { CHECK_PTR_VAL(($$.b = gen_ncode(cstate, NULL, $1,
 505                                                    $$.q = $<blk>0.q))); }
 506         | pid
 507         ;
 508 term:     rterm
 509         | not term              { gen_not($2.b); $$ = $2; }
 510         ;
 511 head:     pqual dqual aqual     { QSET($$.q, $1, $2, $3); }
 512         | pqual dqual           { QSET($$.q, $1, $2, Q_DEFAULT); }
 513         | pqual aqual           { QSET($$.q, $1, Q_DEFAULT, $2); }
 514         | pqual PROTO           { QSET($$.q, $1, Q_DEFAULT, Q_PROTO); }
 515         | pqual PROTOCHAIN      {
 516 #ifdef NO_PROTOCHAIN
 517                                   bpf_set_error(cstate, "protochain not supported");
 518                                   YYABORT;
 519 #else
 520                                   QSET($$.q, $1, Q_DEFAULT, Q_PROTOCHAIN);
 521 #endif
 522                                 }
 523         | pqual ndaqual         { QSET($$.q, $1, Q_DEFAULT, $2); }
 524         ;
 525 rterm:    head id               { $$ = $2; }
 526         | paren expr ')'        { $$.b = $2.b; $$.q = $1.q; }
 527         | pname                 { CHECK_PTR_VAL(($$.b = gen_proto_abbrev(cstate, $1))); $$.q = qerr; }
 528         | arth relop arth       { CHECK_PTR_VAL(($$.b = gen_relation(cstate, $2, $1, $3, 0)));
 529                                   $$.q = qerr; }
 530         | arth irelop arth      { CHECK_PTR_VAL(($$.b = gen_relation(cstate, $2, $1, $3, 1)));
 531                                   $$.q = qerr; }
 532         | other                 { $$.b = $1; $$.q = qerr; }
 533         | atmtype               { CHECK_PTR_VAL(($$.b = gen_atmtype_abbrev(cstate, $1))); $$.q = qerr; }
 534         | atmmultitype          { CHECK_PTR_VAL(($$.b = gen_atmmulti_abbrev(cstate, $1))); $$.q = qerr; }
 535         | atmfield atmvalue     { $$.b = $2.b; $$.q = qerr; }
 536         | mtp2type              { CHECK_PTR_VAL(($$.b = gen_mtp2type_abbrev(cstate, $1))); $$.q = qerr; }
 537         | mtp3field mtp3value   { $$.b = $2.b; $$.q = qerr; }
 538         ;
 539 /* protocol level qualifiers */
 540 pqual:    pname
 541         |                       { $$ = Q_DEFAULT; }
 542         ;
 543 /* 'direction' qualifiers */
 544 dqual:    SRC                   { $$ = Q_SRC; }
 545         | DST                   { $$ = Q_DST; }
 546         | SRC OR DST            { $$ = Q_OR; }
 547         | DST OR SRC            { $$ = Q_OR; }
 548         | SRC AND DST           { $$ = Q_AND; }
 549         | DST AND SRC           { $$ = Q_AND; }
 550         | ADDR1                 { $$ = Q_ADDR1; }
 551         | ADDR2                 { $$ = Q_ADDR2; }
 552         | ADDR3                 { $$ = Q_ADDR3; }
 553         | ADDR4                 { $$ = Q_ADDR4; }
 554         | RA                    { $$ = Q_RA; }
 555         | TA                    { $$ = Q_TA; }
 556         ;
 557 /* address type qualifiers */
 558 aqual:    HOST                  { $$ = Q_HOST; }
 559         | NET                   { $$ = Q_NET; }
 560         | PORT                  { $$ = Q_PORT; }
 561         | PORTRANGE             { $$ = Q_PORTRANGE; }
 562         ;
 563 /* non-directional address type qualifiers */
 564 ndaqual:  GATEWAY               { $$ = Q_GATEWAY; }
 565         ;
 566 pname:    LINK                  { $$ = Q_LINK; }
 567         | IP                    { $$ = Q_IP; }
 568         | ARP                   { $$ = Q_ARP; }
 569         | RARP                  { $$ = Q_RARP; }
 570         | SCTP                  { $$ = Q_SCTP; }
 571         | TCP                   { $$ = Q_TCP; }
 572         | UDP                   { $$ = Q_UDP; }
 573         | ICMP                  { $$ = Q_ICMP; }
 574         | IGMP                  { $$ = Q_IGMP; }
 575         | IGRP                  { $$ = Q_IGRP; }
 576         | PIM                   { $$ = Q_PIM; }
 577         | VRRP                  { $$ = Q_VRRP; }
 578         | CARP                  { $$ = Q_CARP; }
 579         | ATALK                 { $$ = Q_ATALK; }
 580         | AARP                  { $$ = Q_AARP; }
 581         | DECNET                { $$ = Q_DECNET; }
 582         | LAT                   { $$ = Q_LAT; }
 583         | SCA                   { $$ = Q_SCA; }
 584         | MOPDL                 { $$ = Q_MOPDL; }
 585         | MOPRC                 { $$ = Q_MOPRC; }
 586         | IPV6                  { $$ = Q_IPV6; }
 587         | ICMPV6                { $$ = Q_ICMPV6; }
 588         | AH                    { $$ = Q_AH; }
 589         | ESP                   { $$ = Q_ESP; }
 590         | ISO                   { $$ = Q_ISO; }
 591         | ESIS                  { $$ = Q_ESIS; }
 592         | ISIS                  { $$ = Q_ISIS; }
 593         | L1                    { $$ = Q_ISIS_L1; }
 594         | L2                    { $$ = Q_ISIS_L2; }
 595         | IIH                   { $$ = Q_ISIS_IIH; }
 596         | LSP                   { $$ = Q_ISIS_LSP; }
 597         | SNP                   { $$ = Q_ISIS_SNP; }
 598         | PSNP                  { $$ = Q_ISIS_PSNP; }
 599         | CSNP                  { $$ = Q_ISIS_CSNP; }
 600         | CLNP                  { $$ = Q_CLNP; }
 601         | STP                   { $$ = Q_STP; }
 602         | IPX                   { $$ = Q_IPX; }
 603         | NETBEUI               { $$ = Q_NETBEUI; }
 604         | RADIO                 { $$ = Q_RADIO; }
 605         ;
 606 other:    pqual TK_BROADCAST    { CHECK_PTR_VAL(($$ = gen_broadcast(cstate, $1))); }
 607         | pqual TK_MULTICAST    { CHECK_PTR_VAL(($$ = gen_multicast(cstate, $1))); }
 608         | LESS NUM              { CHECK_PTR_VAL(($$ = gen_less(cstate, $2))); }
 609         | GREATER NUM           { CHECK_PTR_VAL(($$ = gen_greater(cstate, $2))); }
 610         | CBYTE NUM byteop NUM  { CHECK_PTR_VAL(($$ = gen_byteop(cstate, $3, $2, $4))); }
 611         | INBOUND               { CHECK_PTR_VAL(($$ = gen_inbound(cstate, 0))); }
 612         | OUTBOUND              { CHECK_PTR_VAL(($$ = gen_inbound(cstate, 1))); }
 613         | IFINDEX NUM           { CHECK_PTR_VAL(($$ = gen_ifindex(cstate, $2))); }
 614         | VLAN pnum             { CHECK_PTR_VAL(($$ = gen_vlan(cstate, $2, 1))); }
 615         | VLAN                  { CHECK_PTR_VAL(($$ = gen_vlan(cstate, 0, 0))); }
 616         | MPLS pnum             { CHECK_PTR_VAL(($$ = gen_mpls(cstate, $2, 1))); }
 617         | MPLS                  { CHECK_PTR_VAL(($$ = gen_mpls(cstate, 0, 0))); }
 618         | PPPOED                { CHECK_PTR_VAL(($$ = gen_pppoed(cstate))); }
 619         | PPPOES pnum           { CHECK_PTR_VAL(($$ = gen_pppoes(cstate, $2, 1))); }
 620         | PPPOES                { CHECK_PTR_VAL(($$ = gen_pppoes(cstate, 0, 0))); }
 621         | GENEVE pnum           { CHECK_PTR_VAL(($$ = gen_geneve(cstate, $2, 1))); }
 622         | GENEVE                { CHECK_PTR_VAL(($$ = gen_geneve(cstate, 0, 0))); }
 623         | pfvar                 { $$ = $1; }
 624         | pqual p80211          { $$ = $2; }
 625         | pllc                  { $$ = $1; }
 626         ;
 627
 628 pfvar:    PF_IFNAME ID          { CHECK_PTR_VAL($2); CHECK_PTR_VAL(($$ = gen_pf_ifname(cstate, $2))); }
 629         | PF_RSET ID            { CHECK_PTR_VAL($2); CHECK_PTR_VAL(($$ = gen_pf_ruleset(cstate, $2))); }
 630         | PF_RNR NUM            { CHECK_PTR_VAL(($$ = gen_pf_rnr(cstate, $2))); }
 631         | PF_SRNR NUM           { CHECK_PTR_VAL(($$ = gen_pf_srnr(cstate, $2))); }
 632         | PF_REASON reason      { CHECK_PTR_VAL(($$ = gen_pf_reason(cstate, $2))); }
 633         | PF_ACTION action      { CHECK_PTR_VAL(($$ = gen_pf_action(cstate, $2))); }
 634         ;
 635
 636 p80211:   TYPE type SUBTYPE subtype
 637                                 { CHECK_PTR_VAL(($$ = gen_p80211_type(cstate, $2 | $4,
 638                                         IEEE80211_FC0_TYPE_MASK |
 639                                         IEEE80211_FC0_SUBTYPE_MASK)));
 640                                 }
 641         | TYPE type             { CHECK_PTR_VAL(($$ = gen_p80211_type(cstate, $2,
 642                                         IEEE80211_FC0_TYPE_MASK)));
 643                                 }
 644         | SUBTYPE type_subtype  { CHECK_PTR_VAL(($$ = gen_p80211_type(cstate, $2,
 645                                         IEEE80211_FC0_TYPE_MASK |
 646                                         IEEE80211_FC0_SUBTYPE_MASK)));
 647                                 }
 648         | DIR dir               { CHECK_PTR_VAL(($$ = gen_p80211_fcdir(cstate, $2))); }
 649         ;
 650
 651 type:     NUM                   { if (($1 & (~IEEE80211_FC0_TYPE_MASK)) != 0) {
 652                                         bpf_set_error(cstate, "invalid 802.11 type value 0x%02x", $1);
 653                                         YYABORT;
 654                                   }
 655                                   $$ = (int)$1;
 656                                 }
 657         | ID                    { CHECK_PTR_VAL($1);
 658                                   $$ = str2tok($1, ieee80211_types);
 659                                   if ($$ == -1) {
 660                                         bpf_set_error(cstate, "unknown 802.11 type name \"%s\"", $1);
 661                                         YYABORT;
 662                                   }
 663                                 }
 664         ;
 665
 666 subtype:  NUM                   { if (($1 & (~IEEE80211_FC0_SUBTYPE_MASK)) != 0) {
 667                                         bpf_set_error(cstate, "invalid 802.11 subtype value 0x%02x", $1);
 668                                         YYABORT;
 669                                   }
 670                                   $$ = (int)$1;
 671                                 }
 672         | ID                    { const struct tok *types = NULL;
 673                                   int i;
 674                                   CHECK_PTR_VAL($1);
 675                                   for (i = 0;; i++) {
 676                                         if (ieee80211_type_subtypes[i].tok == NULL) {
 677                                                 /* Ran out of types */
 678                                                 bpf_set_error(cstate, "unknown 802.11 type");
 679                                                 YYABORT;
 680                                         }
 681                                         if ($<i>-1 == ieee80211_type_subtypes[i].type) {
 682                                                 types = ieee80211_type_subtypes[i].tok;
 683                                                 break;
 684                                         }
 685                                   }
 686
 687                                   $$ = str2tok($1, types);
 688                                   if ($$ == -1) {
 689                                         bpf_set_error(cstate, "unknown 802.11 subtype name \"%s\"", $1);
 690                                         YYABORT;
 691                                   }
 692                                 }
 693         ;
 694
 695 type_subtype:   ID              { int i;
 696                                   CHECK_PTR_VAL($1);
 697                                   for (i = 0;; i++) {
 698                                         if (ieee80211_type_subtypes[i].tok == NULL) {
 699                                                 /* Ran out of types */
 700                                                 bpf_set_error(cstate, "unknown 802.11 type name");
 701                                                 YYABORT;
 702                                         }
 703                                         $$ = str2tok($1, ieee80211_type_subtypes[i].tok);
 704                                         if ($$ != -1) {
 705                                                 $$ |= ieee80211_type_subtypes[i].type;
 706                                                 break;
 707                                         }
 708                                   }
 709                                 }
 710                 ;
 711
 712 pllc:   LLC                     { CHECK_PTR_VAL(($$ = gen_llc(cstate))); }
 713         | LLC ID                { CHECK_PTR_VAL($2);
 714                                   if (pcap_strcasecmp($2, "i") == 0) {
 715                                         CHECK_PTR_VAL(($$ = gen_llc_i(cstate)));
 716                                   } else if (pcap_strcasecmp($2, "s") == 0) {
 717                                         CHECK_PTR_VAL(($$ = gen_llc_s(cstate)));
 718                                   } else if (pcap_strcasecmp($2, "u") == 0) {
 719                                         CHECK_PTR_VAL(($$ = gen_llc_u(cstate)));
 720                                   } else {
 721                                         int subtype;
 722
 723                                         subtype = str2tok($2, llc_s_subtypes);
 724                                         if (subtype != -1) {
 725                                                 CHECK_PTR_VAL(($$ = gen_llc_s_subtype(cstate, subtype)));
 726                                         } else {
 727                                                 subtype = str2tok($2, llc_u_subtypes);
 728                                                 if (subtype == -1) {
 729                                                         bpf_set_error(cstate, "unknown LLC type name \"%s\"", $2);
 730                                                         YYABORT;
 731                                                 }
 732                                                 CHECK_PTR_VAL(($$ = gen_llc_u_subtype(cstate, subtype)));
 733                                         }
 734                                   }
 735                                 }
 736                                 /* sigh, "rnr" is already a keyword for PF */
 737         | LLC PF_RNR            { CHECK_PTR_VAL(($$ = gen_llc_s_subtype(cstate, LLC_RNR))); }
 738         ;
 739
 740 dir:      NUM                   { $$ = (int)$1; }
 741         | ID                    { CHECK_PTR_VAL($1);
 742                                   if (pcap_strcasecmp($1, "nods") == 0)
 743                                         $$ = IEEE80211_FC1_DIR_NODS;
 744                                   else if (pcap_strcasecmp($1, "tods") == 0)
 745                                         $$ = IEEE80211_FC1_DIR_TODS;
 746                                   else if (pcap_strcasecmp($1, "fromds") == 0)
 747                                         $$ = IEEE80211_FC1_DIR_FROMDS;
 748                                   else if (pcap_strcasecmp($1, "dstods") == 0)
 749                                         $$ = IEEE80211_FC1_DIR_DSTODS;
 750                                   else {
 751                                         bpf_set_error(cstate, "unknown 802.11 direction");
 752                                         YYABORT;
 753                                   }
 754                                 }
 755         ;
 756
 757 reason:   NUM                   { $$ = $1; }
 758         | ID                    { CHECK_PTR_VAL($1); CHECK_INT_VAL(($$ = pfreason_to_num(cstate, $1))); }
 759         ;
 760
 761 action:   ID                    { CHECK_PTR_VAL($1); CHECK_INT_VAL(($$ = pfaction_to_num(cstate, $1))); }
 762         ;
 763
 764 relop:    '>'                   { $$ = BPF_JGT; }
 765         | GEQ                   { $$ = BPF_JGE; }
 766         | '='                   { $$ = BPF_JEQ; }
 767         ;
 768 irelop:   LEQ                   { $$ = BPF_JGT; }
 769         | '<'                   { $$ = BPF_JGE; }
 770         | NEQ                   { $$ = BPF_JEQ; }
 771         ;
 772 arth:     pnum                  { CHECK_PTR_VAL(($$ = gen_loadi(cstate, $1))); }
 773         | narth
 774         ;
 775 narth:    pname '[' arth ']'            { CHECK_PTR_VAL(($$ = gen_load(cstate, $1, $3, 1))); }
 776         | pname '[' arth ':' NUM ']'    { CHECK_PTR_VAL(($$ = gen_load(cstate, $1, $3, $5))); }
 777         | arth '+' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_ADD, $1, $3))); }
 778         | arth '-' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_SUB, $1, $3))); }
 779         | arth '*' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_MUL, $1, $3))); }
 780         | arth '/' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_DIV, $1, $3))); }
 781         | arth '%' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_MOD, $1, $3))); }
 782         | arth '&' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_AND, $1, $3))); }
 783         | arth '|' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_OR, $1, $3))); }
 784         | arth '^' arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_XOR, $1, $3))); }
 785         | arth LSH arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_LSH, $1, $3))); }
 786         | arth RSH arth                 { CHECK_PTR_VAL(($$ = gen_arth(cstate, BPF_RSH, $1, $3))); }
 787         | '-' arth %prec UMINUS         { CHECK_PTR_VAL(($$ = gen_neg(cstate, $2))); }
 788         | paren narth ')'               { $$ = $2; }
 789         | LEN                           { CHECK_PTR_VAL(($$ = gen_loadlen(cstate))); }
 790         ;
 791 byteop:   '&'                   { $$ = '&'; }
 792         | '|'                   { $$ = '|'; }
 793         | '<'                   { $$ = '<'; }
 794         | '>'                   { $$ = '>'; }
 795         | '='                   { $$ = '='; }
 796         ;
 797 pnum:     NUM
 798         | paren pnum ')'        { $$ = $2; }
 799         ;
 800 atmtype: LANE                   { $$ = A_LANE; }
 801         | METAC                 { $$ = A_METAC; }
 802         | BCC                   { $$ = A_BCC; }
 803         | OAMF4EC               { $$ = A_OAMF4EC; }
 804         | OAMF4SC               { $$ = A_OAMF4SC; }
 805         | SC                    { $$ = A_SC; }
 806         | ILMIC                 { $$ = A_ILMIC; }
 807         ;
 808 atmmultitype: OAM               { $$ = A_OAM; }
 809         | OAMF4                 { $$ = A_OAMF4; }
 810         | CONNECTMSG            { $$ = A_CONNECTMSG; }
 811         | METACONNECT           { $$ = A_METACONNECT; }
 812         ;
 813         /* ATM field types quantifier */
 814 atmfield: VPI                   { $$.atmfieldtype = A_VPI; }
 815         | VCI                   { $$.atmfieldtype = A_VCI; }
 816         ;
 817 atmvalue: atmfieldvalue
 818         | relop NUM             { CHECK_PTR_VAL(($$.b = gen_atmfield_code(cstate, $<blk>0.atmfieldtype, $2, $1, 0))); }
 819         | irelop NUM            { CHECK_PTR_VAL(($$.b = gen_atmfield_code(cstate, $<blk>0.atmfieldtype, $2, $1, 1))); }
 820         | paren atmlistvalue ')' { $$.b = $2.b; $$.q = qerr; }
 821         ;
 822 atmfieldvalue: NUM {
 823         $$.atmfieldtype = $<blk>0.atmfieldtype;
 824         if ($$.atmfieldtype == A_VPI ||
 825             $$.atmfieldtype == A_VCI)
 826                 CHECK_PTR_VAL(($$.b = gen_atmfield_code(cstate, $$.atmfieldtype, $1, BPF_JEQ, 0)));
 827         }
 828         ;
 829 atmlistvalue: atmfieldvalue
 830         | atmlistvalue or atmfieldvalue { gen_or($1.b, $3.b); $$ = $3; }
 831         ;
 832         /* MTP2 types quantifier */
 833 mtp2type: FISU                  { $$ = M_FISU; }
 834         | LSSU                  { $$ = M_LSSU; }
 835         | MSU                   { $$ = M_MSU; }
 836         | HFISU                 { $$ = MH_FISU; }
 837         | HLSSU                 { $$ = MH_LSSU; }
 838         | HMSU                  { $$ = MH_MSU; }
 839         ;
 840         /* MTP3 field types quantifier */
 841 mtp3field: SIO                  { $$.mtp3fieldtype = M_SIO; }
 842         | OPC                   { $$.mtp3fieldtype = M_OPC; }
 843         | DPC                   { $$.mtp3fieldtype = M_DPC; }
 844         | SLS                   { $$.mtp3fieldtype = M_SLS; }
 845         | HSIO                  { $$.mtp3fieldtype = MH_SIO; }
 846         | HOPC                  { $$.mtp3fieldtype = MH_OPC; }
 847         | HDPC                  { $$.mtp3fieldtype = MH_DPC; }
 848         | HSLS                  { $$.mtp3fieldtype = MH_SLS; }
 849         ;
 850 mtp3value: mtp3fieldvalue
 851         | relop NUM             { CHECK_PTR_VAL(($$.b = gen_mtp3field_code(cstate, $<blk>0.mtp3fieldtype, $2, $1, 0))); }
 852         | irelop NUM            { CHECK_PTR_VAL(($$.b = gen_mtp3field_code(cstate, $<blk>0.mtp3fieldtype, $2, $1, 1))); }
 853         | paren mtp3listvalue ')' { $$.b = $2.b; $$.q = qerr; }
 854         ;
 855 mtp3fieldvalue: NUM {
 856         $$.mtp3fieldtype = $<blk>0.mtp3fieldtype;
 857         if ($$.mtp3fieldtype == M_SIO ||
 858             $$.mtp3fieldtype == M_OPC ||
 859             $$.mtp3fieldtype == M_DPC ||
 860             $$.mtp3fieldtype == M_SLS ||
 861             $$.mtp3fieldtype == MH_SIO ||
 862             $$.mtp3fieldtype == MH_OPC ||
 863             $$.mtp3fieldtype == MH_DPC ||
 864             $$.mtp3fieldtype == MH_SLS)
 865                 CHECK_PTR_VAL(($$.b = gen_mtp3field_code(cstate, $$.mtp3fieldtype, $1, BPF_JEQ, 0)));
 866         }
 867         ;
 868 mtp3listvalue: mtp3fieldvalue
 869         | mtp3listvalue or mtp3fieldvalue { gen_or($1.b, $3.b); $$ = $3; }
 870         ;
 871 %%