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  * $FreeBSD$
  23  */
  24
  25 #ifndef lint
  26 static const char rcsid[] _U_ =
  27     "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.112 2008-02-06 10:21:30 guy Exp $ (LBL)";
  28 #endif
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #ifdef WIN32
  35 #include <pcap-stdinc.h>
  36 #else /* WIN32 */
  37 #if HAVE_INTTYPES_H
  38 #include <inttypes.h>
  39 #elif HAVE_STDINT_H
  40 #include <stdint.h>
  41 #endif
  42 #ifdef HAVE_SYS_BITYPES_H
  43 #include <sys/bitypes.h>
  44 #endif
  45 #include <sys/types.h>
  46 #endif /* WIN32 */
  47
  48 #include <ctype.h>
  49 #include <string.h>
  50
  51 #include "pcap-int.h"
  52
  53 #include "gencode.h"
  54 #ifdef INET6
  55 #ifdef WIN32
  56 #include <pcap-stdinc.h>
  57
  58 #ifdef __MINGW32__
  59 #include "ip6_misc.h"
  60 #endif
  61 #else /* WIN32 */
  62 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
  63 #include <netdb.h>      /* for "struct addrinfo" */
  64 #endif /* WIN32 */
  65
  66 /* Workaround for AIX 4.3 */
  67 #if !defined(AI_NUMERICHOST)
  68 #define AI_NUMERICHOST 0x04
  69 #endif
  70 #endif /*INET6*/
  71 #include <pcap/namedb.h>
  72 #include "tokdefs.h"
  73
  74 #ifdef HAVE_OS_PROTO_H
  75 #include "os-proto.h"
  76 #endif
  77
  78 static int stoi(char *);
  79 static inline int xdtoi(int);
  80
  81 #ifdef FLEX_SCANNER
  82 #define YY_NO_INPUT
  83 #define YY_NO_UNPUT
  84 static YY_BUFFER_STATE in_buffer;
  85 #else
  86 static const char *in_buffer;
  87
  88 #undef getc
  89 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  90 #endif
  91
  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             return IPV6;
 211 icmp6           return ICMPV6;
 212 ah              return AH;
 213 esp             return ESP;
 214
 215 atalk           return ATALK;
 216 aarp            return AARP;
 217 decnet          return DECNET;
 218 lat             return LAT;
 219 sca             return SCA;
 220 moprc           return MOPRC;
 221 mopdl           return MOPDL;
 222
 223 iso             return ISO;
 224 esis            return ESIS;
 225 es-is           return ESIS;
 226 isis            return ISIS;
 227 is-is           return ISIS;
 228 l1              return L1;
 229 l2              return L2;
 230 iih             return IIH;
 231 lsp             return LSP;
 232 snp             return SNP;
 233 csnp            return CSNP;
 234 psnp            return PSNP;
 235
 236 clnp            return CLNP;
 237
 238 stp             return STP;
 239
 240 ipx             return IPX;
 241
 242 netbeui         return NETBEUI;
 243
 244 host            return HOST;
 245 net             return NET;
 246 mask            return NETMASK;
 247 port            return PORT;
 248 portrange       return PORTRANGE;
 249 proto           return PROTO;
 250 protochain      {
 251 #ifdef NO_PROTOCHAIN
 252                   bpf_error("%s not supported", yytext);
 253 #else
 254                   return PROTOCHAIN;
 255 #endif
 256                 }
 257
 258 gateway         return GATEWAY;
 259
 260 type            return TYPE;
 261 subtype         return SUBTYPE;
 262 direction|dir   return DIR;
 263 address1|addr1  return ADDR1;
 264 address2|addr2  return ADDR2;
 265 address3|addr3  return ADDR3;
 266 address4|addr4  return ADDR4;
 267 ra              return RA;
 268 ta              return TA;
 269
 270 less            return LESS;
 271 greater         return GREATER;
 272 byte            return CBYTE;
 273 broadcast       return TK_BROADCAST;
 274 multicast       return TK_MULTICAST;
 275
 276 and|"&&"        return AND;
 277 or|"||"         return OR;
 278 not             return '!';
 279
 280 len|length      return LEN;
 281 inbound         return INBOUND;
 282 outbound        return OUTBOUND;
 283
 284 vlan            return VLAN;
 285 mpls            return MPLS;
 286 pppoed          return PPPOED;
 287 pppoes          return PPPOES;
 288
 289 lane            return LANE;
 290 llc             return LLC;
 291 metac           return METAC;
 292 bcc             return BCC;
 293 oam             return OAM;
 294 oamf4           return OAMF4;
 295 oamf4ec         return OAMF4EC;
 296 oamf4sc         return OAMF4SC;
 297 sc              return SC;
 298 ilmic           return ILMIC;
 299 vpi             return VPI;
 300 vci             return VCI;
 301 connectmsg      return CONNECTMSG;
 302 metaconnect     return METACONNECT;
 303
 304 on|ifname       return PF_IFNAME;
 305 rset|ruleset    return PF_RSET;
 306 rnr|rulenum     return PF_RNR;
 307 srnr|subrulenum return PF_SRNR;
 308 reason          return PF_REASON;
 309 action          return PF_ACTION;
 310
 311 fisu            return FISU;
 312 lssu            return LSSU;
 313 lsu             return LSSU;
 314 msu             return MSU;
 315 sio             return SIO;
 316 opc             return OPC;
 317 dpc             return DPC;
 318 sls             return SLS;
 319
 320 [ \r\n\t]               ;
 321 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 322 ">="                    return GEQ;
 323 "<="                    return LEQ;
 324 "!="                    return NEQ;
 325 "=="                    return '=';
 326 "<<"                    return LSH;
 327 ">>"                    return RSH;
 328 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 329                           return AID; }
 330 {MAC}                   { yylval.e = pcap_ether_aton((char *)yytext);
 331                           return EID; }
 332 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 333 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 334                         yylval.s = sdup((char *)yytext); return HID; }
 335 {V6}                    {
 336 #ifdef INET6
 337                           struct addrinfo hints, *res;
 338                           memset(&hints, 0, sizeof(hints));
 339                           hints.ai_family = AF_INET6;
 340                           hints.ai_flags = AI_NUMERICHOST;
 341                           if (getaddrinfo(yytext, NULL, &hints, &res))
 342                                 bpf_error("bogus IPv6 address %s", yytext);
 343                           else {
 344                                 freeaddrinfo(res);
 345                                 yylval.s = sdup((char *)yytext); return HID6;
 346                           }
 347 #else
 348                           bpf_error("IPv6 address %s not supported", yytext);
 349 #endif /*INET6*/
 350                         }
 351 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 352 icmptype                { yylval.i = 0; return NUM; }
 353 icmpcode                { yylval.i = 1; return NUM; }
 354 icmp-echoreply          { yylval.i = 0; return NUM; }
 355 icmp-unreach            { yylval.i = 3; return NUM; }
 356 icmp-sourcequench       { yylval.i = 4; return NUM; }
 357 icmp-redirect           { yylval.i = 5; return NUM; }
 358 icmp-echo               { yylval.i = 8; return NUM; }
 359 icmp-routeradvert       { yylval.i = 9; return NUM; }
 360 icmp-routersolicit      { yylval.i = 10; return NUM; }
 361 icmp-timxceed           { yylval.i = 11; return NUM; }
 362 icmp-paramprob          { yylval.i = 12; return NUM; }
 363 icmp-tstamp             { yylval.i = 13; return NUM; }
 364 icmp-tstampreply        { yylval.i = 14; return NUM; }
 365 icmp-ireq               { yylval.i = 15; return NUM; }
 366 icmp-ireqreply          { yylval.i = 16; return NUM; }
 367 icmp-maskreq            { yylval.i = 17; return NUM; }
 368 icmp-maskreply          { yylval.i = 18; return NUM; }
 369 tcpflags                { yylval.i = 13; return NUM; }
 370 tcp-fin                 { yylval.i = 0x01; return NUM; }
 371 tcp-syn                 { yylval.i = 0x02; return NUM; }
 372 tcp-rst                 { yylval.i = 0x04; return NUM; }
 373 tcp-push                { yylval.i = 0x08; return NUM; }
 374 tcp-ack                 { yylval.i = 0x10; return NUM; }
 375 tcp-urg                 { yylval.i = 0x20; return NUM; }
 376 tcp-ece                 { yylval.i = 0x40; return NUM; }
 377 tcp-cwr                 { yylval.i = 0x80; return NUM; }
 378 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 379                          yylval.s = sdup((char *)yytext); return ID; }
 380 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 381 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 382                         bpf_error("illegal token: %s", yytext); }
 383 .                       { bpf_error("illegal char '%c'", *yytext); }
 384 %%
 385 void
 386 lex_init(buf)
 387         const char *buf;
 388 {
 389 #ifdef FLEX_SCANNER
 390         in_buffer = yy_scan_string(buf);
 391 #else
 392         in_buffer = buf;
 393 #endif
 394 }
 395
 396 /*
 397  * Do any cleanup necessary after parsing.
 398  */
 399 void
 400 lex_cleanup()
 401 {
 402 #ifdef FLEX_SCANNER
 403         if (in_buffer != NULL)
 404                 yy_delete_buffer(in_buffer);
 405         in_buffer = NULL;
 406 #endif
 407 }
 408
 409 /*
 410  * Also define a yywrap.  Note that if we're using flex, it will
 411  * define a macro to map this identifier to pcap_wrap.
 412  */
 413 int
 414 yywrap()
 415 {
 416         return 1;
 417 }
 418
 419 /* Hex digit to integer. */
 420 static inline int
 421 xdtoi(c)
 422         register int c;
 423 {
 424         if (isdigit(c))
 425                 return c - '0';
 426         else if (islower(c))
 427                 return c - 'a' + 10;
 428         else
 429                 return c - 'A' + 10;
 430 }
 431
 432 /*
 433  * Convert string to integer.  Just like atoi(), but checks for
 434  * preceding 0x or 0 and uses hex or octal instead of decimal.
 435  */
 436 static int
 437 stoi(s)
 438         char *s;
 439 {
 440         int base = 10;
 441         int n = 0;
 442
 443         if (*s == '0') {
 444                 if (s[1] == 'x' || s[1] == 'X') {
 445                         s += 2;
 446                         base = 16;
 447                 }
 448                 else {
 449                         base = 8;
 450                         s += 1;
 451                 }
 452         }
 453         while (*s)
 454                 n = n * base + xdtoi(*s++);
 455
 456         return n;
 457 }