contrib/libpcap/scanner.l

   1 %{
   2 /*
   3  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
   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
  23 #ifndef lint
  24 static const char rcsid[] _U_ =
  25     "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.112 2008-02-06 10:21:30 guy Exp $ (LBL)";
  26 #endif
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #ifdef WIN32
  33 #include <pcap-stdinc.h>
  34 #else /* WIN32 */
  35 #if HAVE_INTTYPES_H
  36 #include <inttypes.h>
  37 #elif HAVE_STDINT_H
  38 #include <stdint.h>
  39 #endif
  40 #ifdef HAVE_SYS_BITYPES_H
  41 #include <sys/bitypes.h>
  42 #endif
  43 #include <sys/types.h>
  44 #endif /* WIN32 */
  45
  46 #include <ctype.h>
  47 #include <string.h>
  48
  49 #include "pcap-int.h"
  50
  51 #include "gencode.h"
  52 #ifdef INET6
  53 #ifdef WIN32
  54 #include <pcap-stdinc.h>
  55
  56 #ifdef __MINGW32__
  57 #include "ip6_misc.h"
  58 #endif
  59 #else /* WIN32 */
  60 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
  61 #include <netdb.h>      /* for "struct addrinfo" */
  62 #endif /* WIN32 */
  63
  64 /* Workaround for AIX 4.3 */
  65 #if !defined(AI_NUMERICHOST)
  66 #define AI_NUMERICHOST 0x04
  67 #endif
  68 #endif /*INET6*/
  69 #include <pcap/namedb.h>
  70 #include "tokdefs.h"
  71
  72 #ifdef HAVE_OS_PROTO_H
  73 #include "os-proto.h"
  74 #endif
  75
  76 static int stoi(char *);
  77 static inline int xdtoi(int);
  78
  79 #ifdef FLEX_SCANNER
  80 #define YY_NO_INPUT
  81 #define YY_NO_UNPUT
  82 #define YY_NO_INPUT
  83 static YY_BUFFER_STATE in_buffer;
  84 #else
  85 static const char *in_buffer;
  86
  87 #undef getc
  88 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  89 #endif
  90
  91 #define yylval pcap_lval
  92 extern YYSTYPE yylval;
  93
  94 %}
  95
  96 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
  97 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
  98 B2              ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])
  99 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
 100
 101 %a 18400
 102 %o 21500
 103 %e 7600
 104 %k 4550
 105 %p 27600
 106 %n 2000
 107
 108 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
 109
 110 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
 111 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
 112 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
 113 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
 114 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
 115 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
 116 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
 117 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
 118
 119 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
 120 V661            {W}::{W}:{W}:{W}:{W}:{W}
 121 V662            {W}:{W}::{W}:{W}:{W}:{W}
 122 V663            {W}:{W}:{W}::{W}:{W}:{W}
 123 V664            {W}:{W}:{W}:{W}::{W}:{W}
 124 V665            {W}:{W}:{W}:{W}:{W}::{W}
 125 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 126
 127 V650            ::{W}:{W}:{W}:{W}:{W}
 128 V651            {W}::{W}:{W}:{W}:{W}
 129 V652            {W}:{W}::{W}:{W}:{W}
 130 V653            {W}:{W}:{W}::{W}:{W}
 131 V654            {W}:{W}:{W}:{W}::{W}
 132 V655            {W}:{W}:{W}:{W}:{W}::
 133
 134 V640            ::{W}:{W}:{W}:{W}
 135 V641            {W}::{W}:{W}:{W}
 136 V642            {W}:{W}::{W}:{W}
 137 V643            {W}:{W}:{W}::{W}
 138 V644            {W}:{W}:{W}:{W}::
 139
 140 V630            ::{W}:{W}:{W}
 141 V631            {W}::{W}:{W}
 142 V632            {W}:{W}::{W}
 143 V633            {W}:{W}:{W}::
 144
 145 V620            ::{W}:{W}
 146 V621            {W}::{W}
 147 V622            {W}:{W}::
 148
 149 V610            ::{W}
 150 V611            {W}::
 151
 152 V600            ::
 153
 154 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 155
 156 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 157 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 158 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 159 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 160 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 161 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 162
 163 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 164 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 165 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 166 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 167 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 168
 169 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 170 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 171 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 172 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 173
 174 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 175 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 176 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 177
 178 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 179 V6114           {W}::{N}\.{N}\.{N}\.{N}
 180
 181 V6004           ::{N}\.{N}\.{N}\.{N}
 182
 183
 184 V6              ({V680}|{V670}|{V671}|{V672}|{V673}|{V674}|{V675}|{V676}|{V677}|{V660}|{V661}|{V662}|{V663}|{V664}|{V665}|{V666}|{V650}|{V651}|{V652}|{V653}|{V654}|{V655}|{V640}|{V641}|{V642}|{V643}|{V644}|{V630}|{V631}|{V632}|{V633}|{V620}|{V621}|{V622}|{V610}|{V611}|{V600}|{V6604}|{V6504}|{V6514}|{V6524}|{V6534}|{V6544}|{V6554}|{V6404}|{V6414}|{V6424}|{V6434}|{V6444}|{V6304}|{V6314}|{V6324}|{V6334}|{V6204}|{V6214}|{V6224}|{V6104}|{V6114}|{V6004})
 185
 186 MAC             ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3})
 187
 188
 189
 190 %%
 191 dst             return DST;
 192 src             return SRC;
 193
 194 link|ether|ppp|slip  return LINK;
 195 fddi|tr|wlan    return LINK;
 196 arp             return ARP;
 197 rarp            return RARP;
 198 ip              return IP;
 199 sctp            return SCTP;
 200 tcp             return TCP;
 201 udp             return UDP;
 202 icmp            return ICMP;
 203 igmp            return IGMP;
 204 igrp            return IGRP;
 205 pim             return PIM;
 206 vrrp            return VRRP;
 207 carp            return CARP;
 208 radio           return RADIO;
 209
 210 ip6             {
 211 #ifdef INET6
 212                 return IPV6;
 213 #else
 214                 bpf_error("%s not supported", yytext);
 215 #endif
 216                 }
 217 icmp6           {
 218 #ifdef INET6
 219                 return ICMPV6;
 220 #else
 221                 bpf_error("%s not supported", yytext);
 222 #endif
 223                 }
 224 ah              return AH;
 225 esp             return ESP;
 226
 227 atalk           return ATALK;
 228 aarp            return AARP;
 229 decnet          return DECNET;
 230 lat             return LAT;
 231 sca             return SCA;
 232 moprc           return MOPRC;
 233 mopdl           return MOPDL;
 234
 235 iso             return ISO;
 236 esis            return ESIS;
 237 es-is           return ESIS;
 238 isis            return ISIS;
 239 is-is           return ISIS;
 240 l1              return L1;
 241 l2              return L2;
 242 iih             return IIH;
 243 lsp             return LSP;
 244 snp             return SNP;
 245 csnp            return CSNP;
 246 psnp            return PSNP;
 247
 248 clnp            return CLNP;
 249
 250 stp             return STP;
 251
 252 ipx             return IPX;
 253
 254 netbeui         return NETBEUI;
 255
 256 host            return HOST;
 257 net             return NET;
 258 mask            return NETMASK;
 259 port            return PORT;
 260 portrange       return PORTRANGE;
 261 proto           return PROTO;
 262 protochain      {
 263 #ifdef NO_PROTOCHAIN
 264                   bpf_error("%s not supported", yytext);
 265 #else
 266                   return PROTOCHAIN;
 267 #endif
 268                 }
 269
 270 gateway         return GATEWAY;
 271
 272 type            return TYPE;
 273 subtype         return SUBTYPE;
 274 direction|dir   return DIR;
 275 address1|addr1  return ADDR1;
 276 address2|addr2  return ADDR2;
 277 address3|addr3  return ADDR3;
 278 address4|addr4  return ADDR4;
 279 ra              return RA;
 280 ta              return TA;
 281
 282 less            return LESS;
 283 greater         return GREATER;
 284 byte            return CBYTE;
 285 broadcast       return TK_BROADCAST;
 286 multicast       return TK_MULTICAST;
 287
 288 and|"&&"        return AND;
 289 or|"||"         return OR;
 290 not             return '!';
 291
 292 len|length      return LEN;
 293 inbound         return INBOUND;
 294 outbound        return OUTBOUND;
 295
 296 vlan            return VLAN;
 297 mpls            return MPLS;
 298 pppoed          return PPPOED;
 299 pppoes          return PPPOES;
 300
 301 lane            return LANE;
 302 llc             return LLC;
 303 metac           return METAC;
 304 bcc             return BCC;
 305 oam             return OAM;
 306 oamf4           return OAMF4;
 307 oamf4ec         return OAMF4EC;
 308 oamf4sc         return OAMF4SC;
 309 sc              return SC;
 310 ilmic           return ILMIC;
 311 vpi             return VPI;
 312 vci             return VCI;
 313 connectmsg      return CONNECTMSG;
 314 metaconnect     return METACONNECT;
 315
 316 on|ifname       return PF_IFNAME;
 317 rset|ruleset    return PF_RSET;
 318 rnr|rulenum     return PF_RNR;
 319 srnr|subrulenum return PF_SRNR;
 320 reason          return PF_REASON;
 321 action          return PF_ACTION;
 322
 323 fisu            return FISU;
 324 lssu            return LSSU;
 325 lsu             return LSSU;
 326 msu             return MSU;
 327 sio             return SIO;
 328 opc             return OPC;
 329 dpc             return DPC;
 330 sls             return SLS;
 331
 332 [ \r\n\t]               ;
 333 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 334 ">="                    return GEQ;
 335 "<="                    return LEQ;
 336 "!="                    return NEQ;
 337 "=="                    return '=';
 338 "<<"                    return LSH;
 339 ">>"                    return RSH;
 340 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 341                           return AID; }
 342 {MAC}                   { yylval.e = pcap_ether_aton((char *)yytext);
 343                           return EID; }
 344 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 345 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 346                         yylval.s = sdup((char *)yytext); return HID; }
 347 {V6}                    {
 348 #ifdef INET6
 349                           struct addrinfo hints, *res;
 350                           memset(&hints, 0, sizeof(hints));
 351                           hints.ai_family = AF_INET6;
 352                           hints.ai_flags = AI_NUMERICHOST;
 353                           if (getaddrinfo(yytext, NULL, &hints, &res))
 354                                 bpf_error("bogus IPv6 address %s", yytext);
 355                           else {
 356                                 freeaddrinfo(res);
 357                                 yylval.s = sdup((char *)yytext); return HID6;
 358                           }
 359 #else
 360                           bpf_error("IPv6 address %s not supported", yytext);
 361 #endif /*INET6*/
 362                         }
 363 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 364 icmptype                { yylval.i = 0; return NUM; }
 365 icmpcode                { yylval.i = 1; return NUM; }
 366 icmp-echoreply          { yylval.i = 0; return NUM; }
 367 icmp-unreach            { yylval.i = 3; return NUM; }
 368 icmp-sourcequench       { yylval.i = 4; return NUM; }
 369 icmp-redirect           { yylval.i = 5; return NUM; }
 370 icmp-echo               { yylval.i = 8; return NUM; }
 371 icmp-routeradvert       { yylval.i = 9; return NUM; }
 372 icmp-routersolicit      { yylval.i = 10; return NUM; }
 373 icmp-timxceed           { yylval.i = 11; return NUM; }
 374 icmp-paramprob          { yylval.i = 12; return NUM; }
 375 icmp-tstamp             { yylval.i = 13; return NUM; }
 376 icmp-tstampreply        { yylval.i = 14; return NUM; }
 377 icmp-ireq               { yylval.i = 15; return NUM; }
 378 icmp-ireqreply          { yylval.i = 16; return NUM; }
 379 icmp-maskreq            { yylval.i = 17; return NUM; }
 380 icmp-maskreply          { yylval.i = 18; return NUM; }
 381 tcpflags                { yylval.i = 13; return NUM; }
 382 tcp-fin                 { yylval.i = 0x01; return NUM; }
 383 tcp-syn                 { yylval.i = 0x02; return NUM; }
 384 tcp-rst                 { yylval.i = 0x04; return NUM; }
 385 tcp-push                { yylval.i = 0x08; return NUM; }
 386 tcp-ack                 { yylval.i = 0x10; return NUM; }
 387 tcp-urg                 { yylval.i = 0x20; return NUM; }
 388 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 389                          yylval.s = sdup((char *)yytext); return ID; }
 390 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 391 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 392                         bpf_error("illegal token: %s", yytext); }
 393 .                       { bpf_error("illegal char '%c'", *yytext); }
 394 %%
 395 void
 396 lex_init(buf)
 397         const char *buf;
 398 {
 399 #ifdef FLEX_SCANNER
 400         in_buffer = yy_scan_string(buf);
 401 #else
 402         in_buffer = buf;
 403 #endif
 404 }
 405
 406 /*
 407  * Do any cleanup necessary after parsing.
 408  */
 409 void
 410 lex_cleanup()
 411 {
 412 #ifdef FLEX_SCANNER
 413         if (in_buffer != NULL)
 414                 yy_delete_buffer(in_buffer);
 415         in_buffer = NULL;
 416 #endif
 417 }
 418
 419 /*
 420  * Also define a yywrap.  Note that if we're using flex, it will
 421  * define a macro to map this identifier to pcap_wrap.
 422  */
 423 int
 424 yywrap()
 425 {
 426         return 1;
 427 }
 428
 429 /* Hex digit to integer. */
 430 static inline int
 431 xdtoi(c)
 432         register int c;
 433 {
 434         if (isdigit(c))
 435                 return c - '0';
 436         else if (islower(c))
 437                 return c - 'a' + 10;
 438         else
 439                 return c - 'A' + 10;
 440 }
 441
 442 /*
 443  * Convert string to integer.  Just like atoi(), but checks for
 444  * preceding 0x or 0 and uses hex or octal instead of decimal.
 445  */
 446 static int
 447 stoi(s)
 448         char *s;
 449 {
 450         int base = 10;
 451         int n = 0;
 452
 453         if (*s == '0') {
 454                 if (s[1] == 'x' || s[1] == 'X') {
 455                         s += 2;
 456                         base = 16;
 457                 }
 458                 else {
 459                         base = 8;
 460                         s += 1;
 461                 }
 462         }
 463         while (*s)
 464                 n = n * base + xdtoi(*s++);
 465
 466         return n;
 467 }