contrib/libpcap/grammar.y

   1 %{
   2 /*
   3  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that: (1) source code distributions
   8  * retain the above copyright notice and this paragraph in its entirety, (2)
   9  * distributions including binary code include the above copyright notice and
  10  * this paragraph in its entirety in the documentation or other materials
  11  * provided with the distribution, and (3) all advertising materials mentioning
  12  * features or use of this software display the following acknowledgement:
  13  * ``This product includes software developed by the University of California,
  14  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  15  * the University nor the names of its contributors may be used to endorse
  16  * or promote products derived from this software without specific prior
  17  * written permission.
  18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  19  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  20  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  21  *
  22  * $FreeBSD$
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #ifdef WIN32
  30 #include <pcap-stdinc.h>
  31 #else /* WIN32 */
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #endif /* WIN32 */
  35
  36 #include <stdlib.h>
  37
  38 #ifndef WIN32
  39 #if __STDC__
  40 struct mbuf;
  41 struct rtentry;
  42 #endif
  43
  44 #include <netinet/in.h>
  45 #include <arpa/inet.h>
  46 #endif /* WIN32 */
  47
  48 #include <stdio.h>
  49
  50 #include "pcap-int.h"
  51
  52 #include "gencode.h"
  53 #ifdef HAVE_NET_PFVAR_H
  54 #include <net/if.h>
  55 #include <netpfil/pf/pf.h>
  56 #include <net/if_pflog.h>
  57 #endif
  58 #include "llc.h"
  59 #include "ieee80211.h"
  60 #include <pcap/namedb.h>
  61
  62 #ifdef HAVE_OS_PROTO_H
  63 #include "os-proto.h"
  64 #endif
  65
  66 #define QSET(q, p, d, a) (q).proto = (p),\
  67                          (q).dir = (d),\
  68                          (q).addr = (a)
  69
  70 struct tok {
  71         int v;                  /* value */
  72         const char *s;          /* string */
  73 };
  74
  75 static const struct tok ieee80211_types[] = {
  76         { IEEE80211_FC0_TYPE_DATA, "data" },
  77         { IEEE80211_FC0_TYPE_MGT, "mgt" },
  78         { IEEE80211_FC0_TYPE_MGT, "management" },
  79         { IEEE80211_FC0_TYPE_CTL, "ctl" },
  80         { IEEE80211_FC0_TYPE_CTL, "control" },
  81         { 0, NULL }
  82 };
  83 static const struct tok ieee80211_mgt_subtypes[] = {
  84         { IEEE80211_FC0_SUBTYPE_ASSOC_REQ, "assocreq" },
  85         { IEEE80211_FC0_SUBTYPE_ASSOC_REQ, "assoc-req" },
  86         { IEEE80211_FC0_SUBTYPE_ASSOC_RESP, "assocresp" },
  87         { IEEE80211_FC0_SUBTYPE_ASSOC_RESP, "assoc-resp" },
  88         { IEEE80211_FC0_SUBTYPE_REASSOC_REQ, "reassocreq" },
  89         { IEEE80211_FC0_SUBTYPE_REASSOC_REQ, "reassoc-req" },
  90         { IEEE80211_FC0_SUBTYPE_REASSOC_RESP, "reassocresp" },
  91         { IEEE80211_FC0_SUBTYPE_REASSOC_RESP, "reassoc-resp" },
  92         { IEEE80211_FC0_SUBTYPE_PROBE_REQ, "probereq" },
  93         { IEEE80211_FC0_SUBTYPE_PROBE_REQ, "probe-req" },
  94         { IEEE80211_FC0_SUBTYPE_PROBE_RESP, "proberesp" },
  95         { IEEE80211_FC0_SUBTYPE_PROBE_RESP, "probe-resp" },
  96         { IEEE80211_FC0_SUBTYPE_BEACON, "beacon" },
  97         { IEEE80211_FC0_SUBTYPE_ATIM, "atim" },
  98         { IEEE80211_FC0_SUBTYPE_DISASSOC, "disassoc" },
  99         { IEEE80211_FC0_SUBTYPE_DISASSOC, "disassociation" },
 100         { IEEE80211_FC0_SUBTYPE_AUTH, "auth" },
 101         { IEEE80211_FC0_SUBTYPE_AUTH, "authentication" },
 102         { IEEE80211_FC0_SUBTYPE_DEAUTH, "deauth" },
 103         { IEEE80211_FC0_SUBTYPE_DEAUTH, "deauthentication" },
 104         { 0, NULL }
 105 };
 106 static const struct tok ieee80211_ctl_subtypes[] = {
 107         { IEEE80211_FC0_SUBTYPE_PS_POLL, "ps-poll" },
 108         { IEEE80211_FC0_SUBTYPE_RTS, "rts" },
 109         { IEEE80211_FC0_SUBTYPE_CTS, "cts" },
 110         { IEEE80211_FC0_SUBTYPE_ACK, "ack" },
 111         { IEEE80211_FC0_SUBTYPE_CF_END, "cf-end" },
 112         { IEEE80211_FC0_SUBTYPE_CF_END_ACK, "cf-end-ack" },
 113         { 0, NULL }
 114 };
 115 static const struct tok ieee80211_data_subtypes[] = {
 116         { IEEE80211_FC0_SUBTYPE_DATA, "data" },
 117         { IEEE80211_FC0_SUBTYPE_CF_ACK, "data-cf-ack" },
 118         { IEEE80211_FC0_SUBTYPE_CF_POLL, "data-cf-poll" },
 119         { IEEE80211_FC0_SUBTYPE_CF_ACPL, "data-cf-ack-poll" },
 120         { IEEE80211_FC0_SUBTYPE_NODATA, "null" },
 121         { IEEE80211_FC0_SUBTYPE_NODATA_CF_ACK, "cf-ack" },
 122         { IEEE80211_FC0_SUBTYPE_NODATA_CF_POLL, "cf-poll"  },
 123         { IEEE80211_FC0_SUBTYPE_NODATA_CF_ACPL, "cf-ack-poll" },
 124         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_DATA, "qos-data" },
 125         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_CF_ACK, "qos-data-cf-ack" },
 126         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_CF_POLL, "qos-data-cf-poll" },
 127         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_CF_ACPL, "qos-data-cf-ack-poll" },
 128         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_NODATA, "qos" },
 129         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_NODATA_CF_POLL, "qos-cf-poll" },
 130         { IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_SUBTYPE_NODATA_CF_ACPL, "qos-cf-ack-poll" },
 131         { 0, NULL }
 132 };
 133 static const struct tok llc_s_subtypes[] = {
 134         { LLC_RR, "rr" },
 135         { LLC_RNR, "rnr" },
 136         { LLC_REJ, "rej" },
 137         { 0, NULL }
 138 };
 139 static const struct tok llc_u_subtypes[] = {
 140         { LLC_UI, "ui" },
 141         { LLC_UA, "ua" },
 142         { LLC_DISC, "disc" },
 143         { LLC_DM, "dm" },
 144         { LLC_SABME, "sabme" },
 145         { LLC_TEST, "test" },
 146         { LLC_XID, "xid" },
 147         { LLC_FRMR, "frmr" },
 148         { 0, NULL }
 149 };
 150 struct type2tok {
 151         int type;
 152         const struct tok *tok;
 153 };
 154 static const struct type2tok ieee80211_type_subtypes[] = {
 155         { IEEE80211_FC0_TYPE_MGT, ieee80211_mgt_subtypes },
 156         { IEEE80211_FC0_TYPE_CTL, ieee80211_ctl_subtypes },
 157         { IEEE80211_FC0_TYPE_DATA, ieee80211_data_subtypes },
 158         { 0, NULL }
 159 };
 160
 161 static int
 162 str2tok(const char *str, const struct tok *toks)
 163 {
 164         int i;
 165
 166         for (i = 0; toks[i].s != NULL; i++) {
 167                 if (pcap_strcasecmp(toks[i].s, str) == 0)
 168                         return (toks[i].v);
 169         }
 170         return (-1);
 171 }
 172
 173 int n_errors = 0;
 174
 175 static struct qual qerr = { Q_UNDEF, Q_UNDEF, Q_UNDEF, Q_UNDEF };
 176
 177 static void
 178 yyerror(const char *msg)
 179 {
 180         ++n_errors;
 181         bpf_error("%s", msg);
 182         /* NOTREACHED */
 183 }
 184
 185 #ifdef NEED_YYPARSE_WRAPPER
 186 int yyparse(void);
 187
 188 int
 189 pcap_parse()
 190 {
 191         return (yyparse());
 192 }
 193 #endif
 194
 195 #ifdef HAVE_NET_PFVAR_H
 196 static int
 197 pfreason_to_num(const char *reason)
 198 {
 199         const char *reasons[] = PFRES_NAMES;
 200         int i;
 201
 202         for (i = 0; reasons[i]; i++) {
 203                 if (pcap_strcasecmp(reason, reasons[i]) == 0)
 204                         return (i);
 205         }
 206         bpf_error("unknown PF reason");
 207         /*NOTREACHED*/
 208 }
 209
 210 static int
 211 pfaction_to_num(const char *action)
 212 {
 213         if (pcap_strcasecmp(action, "pass") == 0 ||
 214             pcap_strcasecmp(action, "accept") == 0)
 215                 return (PF_PASS);
 216         else if (pcap_strcasecmp(action, "drop") == 0 ||
 217                 pcap_strcasecmp(action, "block") == 0)
 218                 return (PF_DROP);
 219 #if HAVE_PF_NAT_THROUGH_PF_NORDR
 220         else if (pcap_strcasecmp(action, "rdr") == 0)
 221                 return (PF_RDR);
 222         else if (pcap_strcasecmp(action, "nat") == 0)
 223                 return (PF_NAT);
 224         else if (pcap_strcasecmp(action, "binat") == 0)
 225                 return (PF_BINAT);
 226         else if (pcap_strcasecmp(action, "nordr") == 0)
 227                 return (PF_NORDR);
 228 #endif
 229         else {
 230                 bpf_error("unknown PF action");
 231                 /*NOTREACHED*/
 232         }
 233 }
 234 #else /* !HAVE_NET_PFVAR_H */
 235 static int
 236 pfreason_to_num(const char *reason)
 237 {
 238         bpf_error("libpcap was compiled on a machine without pf support");
 239         /*NOTREACHED*/
 240
 241         /* this is to make the VC compiler happy */
 242         return -1;
 243 }
 244
 245 static int
 246 pfaction_to_num(const char *action)
 247 {
 248         bpf_error("libpcap was compiled on a machine without pf support");
 249         /*NOTREACHED*/
 250
 251         /* this is to make the VC compiler happy */
 252         return -1;
 253 }
 254 #endif /* HAVE_NET_PFVAR_H */
 255 %}
 256
 257 %union {
 258         int i;
 259         bpf_u_int32 h;
 260         u_char *e;
 261         char *s;
 262         struct stmt *stmt;
 263         struct arth *a;
 264         struct {
 265                 struct qual q;
 266                 int atmfieldtype;
 267                 int mtp3fieldtype;
 268                 struct block *b;
 269         } blk;
 270         struct block *rblk;
 271 }
 272
 273 %type   <blk>   expr id nid pid term rterm qid
 274 %type   <blk>   head
 275 %type   <i>     pqual dqual aqual ndaqual
 276 %type   <a>     arth narth
 277 %type   <i>     byteop pname pnum relop irelop
 278 %type   <blk>   and or paren not null prog
 279 %type   <rblk>  other pfvar p80211 pllc
 280 %type   <i>     atmtype atmmultitype
 281 %type   <blk>   atmfield
 282 %type   <blk>   atmfieldvalue atmvalue atmlistvalue
 283 %type   <i>     mtp2type
 284 %type   <blk>   mtp3field
 285 %type   <blk>   mtp3fieldvalue mtp3value mtp3listvalue
 286
 287
 288 %token  DST SRC HOST GATEWAY
 289 %token  NET NETMASK PORT PORTRANGE LESS GREATER PROTO PROTOCHAIN CBYTE
 290 %token  ARP RARP IP SCTP TCP UDP ICMP IGMP IGRP PIM VRRP CARP
 291 %token  ATALK AARP DECNET LAT SCA MOPRC MOPDL
 292 %token  TK_BROADCAST TK_MULTICAST
 293 %token  NUM INBOUND OUTBOUND
 294 %token  PF_IFNAME PF_RSET PF_RNR PF_SRNR PF_REASON PF_ACTION
 295 %token  TYPE SUBTYPE DIR ADDR1 ADDR2 ADDR3 ADDR4 RA TA
 296 %token  LINK
 297 %token  GEQ LEQ NEQ
 298 %token  ID EID HID HID6 AID
 299 %token  LSH RSH
 300 %token  LEN
 301 %token  IPV6 ICMPV6 AH ESP
 302 %token  VLAN MPLS
 303 %token  PPPOED PPPOES
 304 %token  ISO ESIS CLNP ISIS L1 L2 IIH LSP SNP CSNP PSNP
 305 %token  STP
 306 %token  IPX
 307 %token  NETBEUI
 308 %token  LANE LLC METAC BCC SC ILMIC OAMF4EC OAMF4SC
 309 %token  OAM OAMF4 CONNECTMSG METACONNECT
 310 %token  VPI VCI
 311 %token  RADIO
 312 %token  FISU LSSU MSU HFISU HLSSU HMSU
 313 %token  SIO OPC DPC SLS HSIO HOPC HDPC HSLS
 314
 315
 316 %type   <s> ID
 317 %type   <e> EID
 318 %type   <e> AID
 319 %type   <s> HID HID6
 320 %type   <i> NUM action reason type subtype type_subtype dir
 321
 322 %left OR AND
 323 %nonassoc  '!'
 324 %left '|'
 325 %left '&'
 326 %left LSH RSH
 327 %left '+' '-'
 328 %left '*' '/'
 329 %nonassoc UMINUS
 330 %%
 331 prog:     null expr
 332 {
 333         finish_parse($2.b);
 334 }
 335         | null
 336         ;
 337 null:     /* null */            { $$.q = qerr; }
 338         ;
 339 expr:     term
 340         | expr and term         { gen_and($1.b, $3.b); $$ = $3; }
 341         | expr and id           { gen_and($1.b, $3.b); $$ = $3; }
 342         | expr or term          { gen_or($1.b, $3.b); $$ = $3; }
 343         | expr or id            { gen_or($1.b, $3.b); $$ = $3; }
 344         ;
 345 and:      AND                   { $$ = $<blk>0; }
 346         ;
 347 or:       OR                    { $$ = $<blk>0; }
 348         ;
 349 id:       nid
 350         | pnum                  { $$.b = gen_ncode(NULL, (bpf_u_int32)$1,
 351                                                    $$.q = $<blk>0.q); }
 352         | paren pid ')'         { $$ = $2; }
 353         ;
 354 nid:      ID                    { $$.b = gen_scode($1, $$.q = $<blk>0.q); }
 355         | HID '/' NUM           { $$.b = gen_mcode($1, NULL, $3,
 356                                     $$.q = $<blk>0.q); }
 357         | HID NETMASK HID       { $$.b = gen_mcode($1, $3, 0,
 358                                     $$.q = $<blk>0.q); }
 359         | HID                   {
 360                                   /* Decide how to parse HID based on proto */
 361                                   $$.q = $<blk>0.q;
 362                                   if ($$.q.addr == Q_PORT)
 363                                         bpf_error("'port' modifier applied to ip host");
 364                                   else if ($$.q.addr == Q_PORTRANGE)
 365                                         bpf_error("'portrange' modifier applied to ip host");
 366                                   else if ($$.q.addr == Q_PROTO)
 367                                         bpf_error("'proto' modifier applied to ip host");
 368                                   else if ($$.q.addr == Q_PROTOCHAIN)
 369                                         bpf_error("'protochain' modifier applied to ip host");
 370                                   $$.b = gen_ncode($1, 0, $$.q);
 371                                 }
 372         | HID6 '/' NUM          {
 373 #ifdef INET6
 374                                   $$.b = gen_mcode6($1, NULL, $3,
 375                                     $$.q = $<blk>0.q);
 376 #else
 377                                   bpf_error("'ip6addr/prefixlen' not supported "
 378                                         "in this configuration");
 379 #endif /*INET6*/
 380                                 }
 381         | HID6                  {
 382 #ifdef INET6
 383                                   $$.b = gen_mcode6($1, 0, 128,
 384                                     $$.q = $<blk>0.q);
 385 #else
 386                                   bpf_error("'ip6addr' not supported "
 387                                         "in this configuration");
 388 #endif /*INET6*/
 389                                 }
 390         | EID                   {
 391                                   $$.b = gen_ecode($1, $$.q = $<blk>0.q);
 392                                   /*
 393                                    * $1 was allocated by "pcap_ether_aton()",
 394                                    * so we must free it now that we're done
 395                                    * with it.
 396                                    */
 397                                   free($1);
 398                                 }
 399         | AID                   {
 400                                   $$.b = gen_acode($1, $$.q = $<blk>0.q);
 401                                   /*
 402                                    * $1 was allocated by "pcap_ether_aton()",
 403                                    * so we must free it now that we're done
 404                                    * with it.
 405                                    */
 406                                   free($1);
 407                                 }
 408         | not id                { gen_not($2.b); $$ = $2; }
 409         ;
 410 not:      '!'                   { $$ = $<blk>0; }
 411         ;
 412 paren:    '('                   { $$ = $<blk>0; }
 413         ;
 414 pid:      nid
 415         | qid and id            { gen_and($1.b, $3.b); $$ = $3; }
 416         | qid or id             { gen_or($1.b, $3.b); $$ = $3; }
 417         ;
 418 qid:      pnum                  { $$.b = gen_ncode(NULL, (bpf_u_int32)$1,
 419                                                    $$.q = $<blk>0.q); }
 420         | pid
 421         ;
 422 term:     rterm
 423         | not term              { gen_not($2.b); $$ = $2; }
 424         ;
 425 head:     pqual dqual aqual     { QSET($$.q, $1, $2, $3); }
 426         | pqual dqual           { QSET($$.q, $1, $2, Q_DEFAULT); }
 427         | pqual aqual           { QSET($$.q, $1, Q_DEFAULT, $2); }
 428         | pqual PROTO           { QSET($$.q, $1, Q_DEFAULT, Q_PROTO); }
 429         | pqual PROTOCHAIN      { QSET($$.q, $1, Q_DEFAULT, Q_PROTOCHAIN); }
 430         | pqual ndaqual         { QSET($$.q, $1, Q_DEFAULT, $2); }
 431         ;
 432 rterm:    head id               { $$ = $2; }
 433         | paren expr ')'        { $$.b = $2.b; $$.q = $1.q; }
 434         | pname                 { $$.b = gen_proto_abbrev($1); $$.q = qerr; }
 435         | arth relop arth       { $$.b = gen_relation($2, $1, $3, 0);
 436                                   $$.q = qerr; }
 437         | arth irelop arth      { $$.b = gen_relation($2, $1, $3, 1);
 438                                   $$.q = qerr; }
 439         | other                 { $$.b = $1; $$.q = qerr; }
 440         | atmtype               { $$.b = gen_atmtype_abbrev($1); $$.q = qerr; }
 441         | atmmultitype          { $$.b = gen_atmmulti_abbrev($1); $$.q = qerr; }
 442         | atmfield atmvalue     { $$.b = $2.b; $$.q = qerr; }
 443         | mtp2type              { $$.b = gen_mtp2type_abbrev($1); $$.q = qerr; }
 444         | mtp3field mtp3value   { $$.b = $2.b; $$.q = qerr; }
 445         ;
 446 /* protocol level qualifiers */
 447 pqual:    pname
 448         |                       { $$ = Q_DEFAULT; }
 449         ;
 450 /* 'direction' qualifiers */
 451 dqual:    SRC                   { $$ = Q_SRC; }
 452         | DST                   { $$ = Q_DST; }
 453         | SRC OR DST            { $$ = Q_OR; }
 454         | DST OR SRC            { $$ = Q_OR; }
 455         | SRC AND DST           { $$ = Q_AND; }
 456         | DST AND SRC           { $$ = Q_AND; }
 457         | ADDR1                 { $$ = Q_ADDR1; }
 458         | ADDR2                 { $$ = Q_ADDR2; }
 459         | ADDR3                 { $$ = Q_ADDR3; }
 460         | ADDR4                 { $$ = Q_ADDR4; }
 461         | RA                    { $$ = Q_RA; }
 462         | TA                    { $$ = Q_TA; }
 463         ;
 464 /* address type qualifiers */
 465 aqual:    HOST                  { $$ = Q_HOST; }
 466         | NET                   { $$ = Q_NET; }
 467         | PORT                  { $$ = Q_PORT; }
 468         | PORTRANGE             { $$ = Q_PORTRANGE; }
 469         ;
 470 /* non-directional address type qualifiers */
 471 ndaqual:  GATEWAY               { $$ = Q_GATEWAY; }
 472         ;
 473 pname:    LINK                  { $$ = Q_LINK; }
 474         | IP                    { $$ = Q_IP; }
 475         | ARP                   { $$ = Q_ARP; }
 476         | RARP                  { $$ = Q_RARP; }
 477         | SCTP                  { $$ = Q_SCTP; }
 478         | TCP                   { $$ = Q_TCP; }
 479         | UDP                   { $$ = Q_UDP; }
 480         | ICMP                  { $$ = Q_ICMP; }
 481         | IGMP                  { $$ = Q_IGMP; }
 482         | IGRP                  { $$ = Q_IGRP; }
 483         | PIM                   { $$ = Q_PIM; }
 484         | VRRP                  { $$ = Q_VRRP; }
 485         | CARP                  { $$ = Q_CARP; }
 486         | ATALK                 { $$ = Q_ATALK; }
 487         | AARP                  { $$ = Q_AARP; }
 488         | DECNET                { $$ = Q_DECNET; }
 489         | LAT                   { $$ = Q_LAT; }
 490         | SCA                   { $$ = Q_SCA; }
 491         | MOPDL                 { $$ = Q_MOPDL; }
 492         | MOPRC                 { $$ = Q_MOPRC; }
 493         | IPV6                  { $$ = Q_IPV6; }
 494         | ICMPV6                { $$ = Q_ICMPV6; }
 495         | AH                    { $$ = Q_AH; }
 496         | ESP                   { $$ = Q_ESP; }
 497         | ISO                   { $$ = Q_ISO; }
 498         | ESIS                  { $$ = Q_ESIS; }
 499         | ISIS                  { $$ = Q_ISIS; }
 500         | L1                    { $$ = Q_ISIS_L1; }
 501         | L2                    { $$ = Q_ISIS_L2; }
 502         | IIH                   { $$ = Q_ISIS_IIH; }
 503         | LSP                   { $$ = Q_ISIS_LSP; }
 504         | SNP                   { $$ = Q_ISIS_SNP; }
 505         | PSNP                  { $$ = Q_ISIS_PSNP; }
 506         | CSNP                  { $$ = Q_ISIS_CSNP; }
 507         | CLNP                  { $$ = Q_CLNP; }
 508         | STP                   { $$ = Q_STP; }
 509         | IPX                   { $$ = Q_IPX; }
 510         | NETBEUI               { $$ = Q_NETBEUI; }
 511         | RADIO                 { $$ = Q_RADIO; }
 512         ;
 513 other:    pqual TK_BROADCAST    { $$ = gen_broadcast($1); }
 514         | pqual TK_MULTICAST    { $$ = gen_multicast($1); }
 515         | LESS NUM              { $$ = gen_less($2); }
 516         | GREATER NUM           { $$ = gen_greater($2); }
 517         | CBYTE NUM byteop NUM  { $$ = gen_byteop($3, $2, $4); }
 518         | INBOUND               { $$ = gen_inbound(0); }
 519         | OUTBOUND              { $$ = gen_inbound(1); }
 520         | VLAN pnum             { $$ = gen_vlan($2); }
 521         | VLAN                  { $$ = gen_vlan(-1); }
 522         | MPLS pnum             { $$ = gen_mpls($2); }
 523         | MPLS                  { $$ = gen_mpls(-1); }
 524         | PPPOED                { $$ = gen_pppoed(); }
 525         | PPPOES pnum           { $$ = gen_pppoes($2); }
 526         | PPPOES                { $$ = gen_pppoes(-1); }
 527         | pfvar                 { $$ = $1; }
 528         | pqual p80211          { $$ = $2; }
 529         | pllc                  { $$ = $1; }
 530         ;
 531
 532 pfvar:    PF_IFNAME ID          { $$ = gen_pf_ifname($2); }
 533         | PF_RSET ID            { $$ = gen_pf_ruleset($2); }
 534         | PF_RNR NUM            { $$ = gen_pf_rnr($2); }
 535         | PF_SRNR NUM           { $$ = gen_pf_srnr($2); }
 536         | PF_REASON reason      { $$ = gen_pf_reason($2); }
 537         | PF_ACTION action      { $$ = gen_pf_action($2); }
 538         ;
 539
 540 p80211:   TYPE type SUBTYPE subtype
 541                                 { $$ = gen_p80211_type($2 | $4,
 542                                         IEEE80211_FC0_TYPE_MASK |
 543                                         IEEE80211_FC0_SUBTYPE_MASK);
 544                                 }
 545         | TYPE type             { $$ = gen_p80211_type($2,
 546                                         IEEE80211_FC0_TYPE_MASK);
 547                                 }
 548         | SUBTYPE type_subtype  { $$ = gen_p80211_type($2,
 549                                         IEEE80211_FC0_TYPE_MASK |
 550                                         IEEE80211_FC0_SUBTYPE_MASK);
 551                                 }
 552         | DIR dir               { $$ = gen_p80211_fcdir($2); }
 553         ;
 554
 555 type:     NUM
 556         | ID                    { $$ = str2tok($1, ieee80211_types);
 557                                   if ($$ == -1)
 558                                         bpf_error("unknown 802.11 type name");
 559                                 }
 560         ;
 561
 562 subtype:  NUM
 563         | ID                    { const struct tok *types = NULL;
 564                                   int i;
 565                                   for (i = 0;; i++) {
 566                                         if (ieee80211_type_subtypes[i].tok == NULL) {
 567                                                 /* Ran out of types */
 568                                                 bpf_error("unknown 802.11 type");
 569                                                 break;
 570                                         }
 571                                         if ($<i>-1 == ieee80211_type_subtypes[i].type) {
 572                                                 types = ieee80211_type_subtypes[i].tok;
 573                                                 break;
 574                                         }
 575                                   }
 576
 577                                   $$ = str2tok($1, types);
 578                                   if ($$ == -1)
 579                                         bpf_error("unknown 802.11 subtype name");
 580                                 }
 581         ;
 582
 583 type_subtype:   ID              { int i;
 584                                   for (i = 0;; i++) {
 585                                         if (ieee80211_type_subtypes[i].tok == NULL) {
 586                                                 /* Ran out of types */
 587                                                 bpf_error("unknown 802.11 type name");
 588                                                 break;
 589                                         }
 590                                         $$ = str2tok($1, ieee80211_type_subtypes[i].tok);
 591                                         if ($$ != -1) {
 592                                                 $$ |= ieee80211_type_subtypes[i].type;
 593                                                 break;
 594                                         }
 595                                   }
 596                                 }
 597                 ;
 598
 599 pllc:   LLC                     { $$ = gen_llc(); }
 600         | LLC ID                { if (pcap_strcasecmp($2, "i") == 0)
 601                                         $$ = gen_llc_i();
 602                                   else if (pcap_strcasecmp($2, "s") == 0)
 603                                         $$ = gen_llc_s();
 604                                   else if (pcap_strcasecmp($2, "u") == 0)
 605                                         $$ = gen_llc_u();
 606                                   else {
 607                                         u_int subtype;
 608
 609                                         subtype = str2tok($2, llc_s_subtypes);
 610                                         if (subtype != -1)
 611                                                 $$ = gen_llc_s_subtype(subtype);
 612                                         else {
 613                                                 subtype = str2tok($2, llc_u_subtypes);
 614                                                 if (subtype == -1)
 615                                                         bpf_error("unknown LLC type name \"%s\"", $2);
 616                                                 $$ = gen_llc_u_subtype(subtype);
 617                                         }
 618                                   }
 619                                 }
 620                                 /* sigh, "rnr" is already a keyword for PF */
 621         | LLC PF_RNR            { $$ = gen_llc_s_subtype(LLC_RNR); }
 622         ;
 623
 624 dir:      NUM
 625         | ID                    { if (pcap_strcasecmp($1, "nods") == 0)
 626                                         $$ = IEEE80211_FC1_DIR_NODS;
 627                                   else if (pcap_strcasecmp($1, "tods") == 0)
 628                                         $$ = IEEE80211_FC1_DIR_TODS;
 629                                   else if (pcap_strcasecmp($1, "fromds") == 0)
 630                                         $$ = IEEE80211_FC1_DIR_FROMDS;
 631                                   else if (pcap_strcasecmp($1, "dstods") == 0)
 632                                         $$ = IEEE80211_FC1_DIR_DSTODS;
 633                                   else
 634                                         bpf_error("unknown 802.11 direction");
 635                                 }
 636         ;
 637
 638 reason:   NUM                   { $$ = $1; }
 639         | ID                    { $$ = pfreason_to_num($1); }
 640         ;
 641
 642 action:   ID                    { $$ = pfaction_to_num($1); }
 643         ;
 644
 645 relop:    '>'                   { $$ = BPF_JGT; }
 646         | GEQ                   { $$ = BPF_JGE; }
 647         | '='                   { $$ = BPF_JEQ; }
 648         ;
 649 irelop:   LEQ                   { $$ = BPF_JGT; }
 650         | '<'                   { $$ = BPF_JGE; }
 651         | NEQ                   { $$ = BPF_JEQ; }
 652         ;
 653 arth:     pnum                  { $$ = gen_loadi($1); }
 654         | narth
 655         ;
 656 narth:    pname '[' arth ']'            { $$ = gen_load($1, $3, 1); }
 657         | pname '[' arth ':' NUM ']'    { $$ = gen_load($1, $3, $5); }
 658         | arth '+' arth                 { $$ = gen_arth(BPF_ADD, $1, $3); }
 659         | arth '-' arth                 { $$ = gen_arth(BPF_SUB, $1, $3); }
 660         | arth '*' arth                 { $$ = gen_arth(BPF_MUL, $1, $3); }
 661         | arth '/' arth                 { $$ = gen_arth(BPF_DIV, $1, $3); }
 662         | arth '%' arth                 { $$ = gen_arth(BPF_MOD, $1, $3); }
 663         | arth '&' arth                 { $$ = gen_arth(BPF_AND, $1, $3); }
 664         | arth '|' arth                 { $$ = gen_arth(BPF_OR, $1, $3); }
 665         | arth '^' arth                 { $$ = gen_arth(BPF_XOR, $1, $3); }
 666         | arth LSH arth                 { $$ = gen_arth(BPF_LSH, $1, $3); }
 667         | arth RSH arth                 { $$ = gen_arth(BPF_RSH, $1, $3); }
 668         | '-' arth %prec UMINUS         { $$ = gen_neg($2); }
 669         | paren narth ')'               { $$ = $2; }
 670         | LEN                           { $$ = gen_loadlen(); }
 671         ;
 672 byteop:   '&'                   { $$ = '&'; }
 673         | '|'                   { $$ = '|'; }
 674         | '<'                   { $$ = '<'; }
 675         | '>'                   { $$ = '>'; }
 676         | '='                   { $$ = '='; }
 677         ;
 678 pnum:     NUM
 679         | paren pnum ')'        { $$ = $2; }
 680         ;
 681 atmtype: LANE                   { $$ = A_LANE; }
 682         | METAC                 { $$ = A_METAC; }
 683         | BCC                   { $$ = A_BCC; }
 684         | OAMF4EC               { $$ = A_OAMF4EC; }
 685         | OAMF4SC               { $$ = A_OAMF4SC; }
 686         | SC                    { $$ = A_SC; }
 687         | ILMIC                 { $$ = A_ILMIC; }
 688         ;
 689 atmmultitype: OAM               { $$ = A_OAM; }
 690         | OAMF4                 { $$ = A_OAMF4; }
 691         | CONNECTMSG            { $$ = A_CONNECTMSG; }
 692         | METACONNECT           { $$ = A_METACONNECT; }
 693         ;
 694         /* ATM field types quantifier */
 695 atmfield: VPI                   { $$.atmfieldtype = A_VPI; }
 696         | VCI                   { $$.atmfieldtype = A_VCI; }
 697         ;
 698 atmvalue: atmfieldvalue
 699         | relop NUM             { $$.b = gen_atmfield_code($<blk>0.atmfieldtype, (bpf_int32)$2, (bpf_u_int32)$1, 0); }
 700         | irelop NUM            { $$.b = gen_atmfield_code($<blk>0.atmfieldtype, (bpf_int32)$2, (bpf_u_int32)$1, 1); }
 701         | paren atmlistvalue ')' { $$.b = $2.b; $$.q = qerr; }
 702         ;
 703 atmfieldvalue: NUM {
 704         $$.atmfieldtype = $<blk>0.atmfieldtype;
 705         if ($$.atmfieldtype == A_VPI ||
 706             $$.atmfieldtype == A_VCI)
 707                 $$.b = gen_atmfield_code($$.atmfieldtype, (bpf_int32) $1, BPF_JEQ, 0);
 708         }
 709         ;
 710 atmlistvalue: atmfieldvalue
 711         | atmlistvalue or atmfieldvalue { gen_or($1.b, $3.b); $$ = $3; }
 712         ;
 713         /* MTP2 types quantifier */
 714 mtp2type: FISU                  { $$ = M_FISU; }
 715         | LSSU                  { $$ = M_LSSU; }
 716         | MSU                   { $$ = M_MSU; }
 717         | HFISU                 { $$ = MH_FISU; }
 718         | HLSSU                 { $$ = MH_LSSU; }
 719         | HMSU                  { $$ = MH_MSU; }
 720         ;
 721         /* MTP3 field types quantifier */
 722 mtp3field: SIO                  { $$.mtp3fieldtype = M_SIO; }
 723         | OPC                   { $$.mtp3fieldtype = M_OPC; }
 724         | DPC                   { $$.mtp3fieldtype = M_DPC; }
 725         | SLS                   { $$.mtp3fieldtype = M_SLS; }
 726         | HSIO                  { $$.mtp3fieldtype = MH_SIO; }
 727         | HOPC                  { $$.mtp3fieldtype = MH_OPC; }
 728         | HDPC                  { $$.mtp3fieldtype = MH_DPC; }
 729         | HSLS                  { $$.mtp3fieldtype = MH_SLS; }
 730         ;
 731 mtp3value: mtp3fieldvalue
 732         | relop NUM             { $$.b = gen_mtp3field_code($<blk>0.mtp3fieldtype, (u_int)$2, (u_int)$1, 0); }
 733         | irelop NUM            { $$.b = gen_mtp3field_code($<blk>0.mtp3fieldtype, (u_int)$2, (u_int)$1, 1); }
 734         | paren mtp3listvalue ')' { $$.b = $2.b; $$.q = qerr; }
 735         ;
 736 mtp3fieldvalue: NUM {
 737         $$.mtp3fieldtype = $<blk>0.mtp3fieldtype;
 738         if ($$.mtp3fieldtype == M_SIO ||
 739             $$.mtp3fieldtype == M_OPC ||
 740             $$.mtp3fieldtype == M_DPC ||
 741             $$.mtp3fieldtype == M_SLS ||
 742             $$.mtp3fieldtype == MH_SIO ||
 743             $$.mtp3fieldtype == MH_OPC ||
 744             $$.mtp3fieldtype == MH_DPC ||
 745             $$.mtp3fieldtype == MH_SLS)
 746                 $$.b = gen_mtp3field_code($$.mtp3fieldtype, (u_int) $1, BPF_JEQ, 0);
 747         }
 748         ;
 749 mtp3listvalue: mtp3fieldvalue
 750         | mtp3listvalue or mtp3fieldvalue { gen_or($1.b, $3.b); $$ = $3; }
 751         ;
 752 %%