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