The Tcpdump Group git mirrors - libpcap/blob - 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 #ifdef _WIN32
  24   #include <pcap-stdinc.h>
  25 #else
  26   #if HAVE_INTTYPES_H
  27     #include <inttypes.h>
  28   #elif HAVE_STDINT_H
  29     #include <stdint.h>
  30   #endif
  31   #ifdef HAVE_SYS_BITYPES_H
  32     #include <sys/bitypes.h>
  33   #endif
  34   #include <sys/types.h>
  35 #endif
  36
  37 #include <ctype.h>
  38 #include <string.h>
  39
  40 #include "pcap-int.h"
  41
  42 #include "gencode.h"
  43
  44 #ifdef INET6
  45
  46 #ifdef _WIN32
  47 /*
  48  * To quote the MSDN page for getaddrinfo() at
  49  *
  50  *    https://msdn.microsoft.com/en-us/library/windows/desktop/ms738520(v=vs.85).aspx
  51  *
  52  * "Support for getaddrinfo on Windows 2000 and older versions
  53  * The getaddrinfo function was added to the Ws2_32.dll on Windows XP and
  54  * later. To execute an application that uses this function on earlier
  55  * versions of Windows, then you need to include the Ws2tcpip.h and
  56  * Wspiapi.h files. When the Wspiapi.h include file is added, the
  57  * getaddrinfo function is defined to the WspiapiGetAddrInfo inline
  58  * function in the Wspiapi.h file. At runtime, the WspiapiGetAddrInfo
  59  * function is implemented in such a way that if the Ws2_32.dll or the
  60  * Wship6.dll (the file containing getaddrinfo in the IPv6 Technology
  61  * Preview for Windows 2000) does not include getaddrinfo, then a
  62  * version of getaddrinfo is implemented inline based on code in the
  63  * Wspiapi.h header file. This inline code will be used on older Windows
  64  * platforms that do not natively support the getaddrinfo function."
  65  *
  66  * We use getaddrinfo(), so we include Wspiapi.h here.  pcap-stdinc.h
  67  * includes Ws2tcpip.h, so we don't need to include it ourselves.
  68  */
  69 #include <Wspiapi.h>
  70 #else /* _WIN32 */
  71 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
  72 #include <netdb.h>      /* for "struct addrinfo" */
  73 #endif /* _WIN32 */
  74
  75 /* Workaround for AIX 4.3 */
  76 #if !defined(AI_NUMERICHOST)
  77 #define AI_NUMERICHOST 0x04
  78 #endif
  79
  80 #endif /*INET6*/
  81
  82 #include <pcap/namedb.h>
  83 #include "tokdefs.h"
  84
  85 #ifdef HAVE_OS_PROTO_H
  86 #include "os-proto.h"
  87 #endif
  88
  89 static int stoi(char *);
  90 static inline int xdtoi(int);
  91
  92 #ifdef FLEX_SCANNER
  93 #define YY_NO_INPUT
  94 #define YY_NO_UNPUT
  95 static YY_BUFFER_STATE in_buffer;
  96 #else
  97 static const char *in_buffer;
  98
  99 #undef getc
 100 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
 101 #endif
 102
 103 #define yylval pcap_lval
 104 extern YYSTYPE yylval;
 105
 106 %}
 107
 108 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
 109 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
 110 B2              ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])
 111 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
 112
 113 %a 18400
 114 %o 21500
 115 %e 7600
 116 %k 4550
 117 %p 27600
 118 %n 2000
 119
 120 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
 121
 122 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
 123 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
 124 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
 125 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
 126 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
 127 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
 128 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
 129 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
 130
 131 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
 132 V661            {W}::{W}:{W}:{W}:{W}:{W}
 133 V662            {W}:{W}::{W}:{W}:{W}:{W}
 134 V663            {W}:{W}:{W}::{W}:{W}:{W}
 135 V664            {W}:{W}:{W}:{W}::{W}:{W}
 136 V665            {W}:{W}:{W}:{W}:{W}::{W}
 137 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 138
 139 V650            ::{W}:{W}:{W}:{W}:{W}
 140 V651            {W}::{W}:{W}:{W}:{W}
 141 V652            {W}:{W}::{W}:{W}:{W}
 142 V653            {W}:{W}:{W}::{W}:{W}
 143 V654            {W}:{W}:{W}:{W}::{W}
 144 V655            {W}:{W}:{W}:{W}:{W}::
 145
 146 V640            ::{W}:{W}:{W}:{W}
 147 V641            {W}::{W}:{W}:{W}
 148 V642            {W}:{W}::{W}:{W}
 149 V643            {W}:{W}:{W}::{W}
 150 V644            {W}:{W}:{W}:{W}::
 151
 152 V630            ::{W}:{W}:{W}
 153 V631            {W}::{W}:{W}
 154 V632            {W}:{W}::{W}
 155 V633            {W}:{W}:{W}::
 156
 157 V620            ::{W}:{W}
 158 V621            {W}::{W}
 159 V622            {W}:{W}::
 160
 161 V610            ::{W}
 162 V611            {W}::
 163
 164 V600            ::
 165
 166 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 167
 168 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 169 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 170 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 171 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 172 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 173 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 174
 175 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 176 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 177 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 178 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 179 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 180
 181 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 182 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 183 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 184 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 185
 186 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 187 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 188 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 189
 190 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 191 V6114           {W}::{N}\.{N}\.{N}\.{N}
 192
 193 V6004           ::{N}\.{N}\.{N}\.{N}
 194
 195
 196 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})
 197
 198 MAC             ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3})
 199
 200
 201
 202 %%
 203 dst             return DST;
 204 src             return SRC;
 205
 206 link|ether|ppp|slip  return LINK;
 207 fddi|tr|wlan    return LINK;
 208 arp             return ARP;
 209 rarp            return RARP;
 210 ip              return IP;
 211 sctp            return SCTP;
 212 tcp             return TCP;
 213 udp             return UDP;
 214 icmp            return ICMP;
 215 igmp            return IGMP;
 216 igrp            return IGRP;
 217 pim             return PIM;
 218 vrrp            return VRRP;
 219 carp            return CARP;
 220 radio           return RADIO;
 221
 222 ip6             return IPV6;
 223 icmp6           return ICMPV6;
 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 geneve          return GENEVE;
 301
 302 lane            return LANE;
 303 llc             return LLC;
 304 metac           return METAC;
 305 bcc             return BCC;
 306 oam             return OAM;
 307 oamf4           return OAMF4;
 308 oamf4ec         return OAMF4EC;
 309 oamf4sc         return OAMF4SC;
 310 sc              return SC;
 311 ilmic           return ILMIC;
 312 vpi             return VPI;
 313 vci             return VCI;
 314 connectmsg      return CONNECTMSG;
 315 metaconnect     return METACONNECT;
 316
 317 on|ifname       return PF_IFNAME;
 318 rset|ruleset    return PF_RSET;
 319 rnr|rulenum     return PF_RNR;
 320 srnr|subrulenum return PF_SRNR;
 321 reason          return PF_REASON;
 322 action          return PF_ACTION;
 323
 324 fisu            return FISU;
 325 lssu            return LSSU;
 326 lsu             return LSSU;
 327 msu             return MSU;
 328 hfisu           return HFISU;
 329 hlssu           return HLSSU;
 330 hmsu            return HMSU;
 331 sio             return SIO;
 332 opc             return OPC;
 333 dpc             return DPC;
 334 sls             return SLS;
 335 hsio            return HSIO;
 336 hopc            return HOPC;
 337 hdpc            return HDPC;
 338 hsls            return HSLS;
 339
 340 [ \r\n\t]               ;
 341 [+\-*/%:\[\]!<>()&|\^=] return yytext[0];
 342 ">="                    return GEQ;
 343 "<="                    return LEQ;
 344 "!="                    return NEQ;
 345 "=="                    return '=';
 346 "<<"                    return LSH;
 347 ">>"                    return RSH;
 348 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 349                           if (yylval.e == NULL)
 350                                 bpf_error("malloc");
 351                           return AID; }
 352 {MAC}                   { yylval.e = pcap_ether_aton((char *)yytext);
 353                           if (yylval.e == NULL)
 354                                 bpf_error("malloc");
 355                           return EID; }
 356 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 357 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 358                         yylval.s = sdup((char *)yytext); return HID; }
 359 {V6}                    {
 360 #ifdef INET6
 361                           struct addrinfo hints, *res;
 362                           memset(&hints, 0, sizeof(hints));
 363                           hints.ai_family = AF_INET6;
 364                           hints.ai_flags = AI_NUMERICHOST;
 365                           if (getaddrinfo(yytext, NULL, &hints, &res))
 366                                 bpf_error("bogus IPv6 address %s", yytext);
 367                           else {
 368                                 freeaddrinfo(res);
 369                                 yylval.s = sdup((char *)yytext); return HID6;
 370                           }
 371 #else
 372                           bpf_error("IPv6 address %s not supported", yytext);
 373 #endif /*INET6*/
 374                         }
 375 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 376 icmptype                { yylval.i = 0; return NUM; }
 377 icmpcode                { yylval.i = 1; return NUM; }
 378 icmp-echoreply          { yylval.i = 0; return NUM; }
 379 icmp-unreach            { yylval.i = 3; return NUM; }
 380 icmp-sourcequench       { yylval.i = 4; return NUM; }
 381 icmp-redirect           { yylval.i = 5; return NUM; }
 382 icmp-echo               { yylval.i = 8; return NUM; }
 383 icmp-routeradvert       { yylval.i = 9; return NUM; }
 384 icmp-routersolicit      { yylval.i = 10; return NUM; }
 385 icmp-timxceed           { yylval.i = 11; return NUM; }
 386 icmp-paramprob          { yylval.i = 12; return NUM; }
 387 icmp-tstamp             { yylval.i = 13; return NUM; }
 388 icmp-tstampreply        { yylval.i = 14; return NUM; }
 389 icmp-ireq               { yylval.i = 15; return NUM; }
 390 icmp-ireqreply          { yylval.i = 16; return NUM; }
 391 icmp-maskreq            { yylval.i = 17; return NUM; }
 392 icmp-maskreply          { yylval.i = 18; return NUM; }
 393 tcpflags                { yylval.i = 13; return NUM; }
 394 tcp-fin                 { yylval.i = 0x01; return NUM; }
 395 tcp-syn                 { yylval.i = 0x02; return NUM; }
 396 tcp-rst                 { yylval.i = 0x04; return NUM; }
 397 tcp-push                { yylval.i = 0x08; return NUM; }
 398 tcp-ack                 { yylval.i = 0x10; return NUM; }
 399 tcp-urg                 { yylval.i = 0x20; return NUM; }
 400 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 401                          yylval.s = sdup((char *)yytext); return ID; }
 402 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 403 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 404                         bpf_error("illegal token: %s", yytext); }
 405 .                       { bpf_error("illegal char '%c'", *yytext); }
 406 %%
 407 void
 408 lex_init(buf)
 409         const char *buf;
 410 {
 411 #ifdef FLEX_SCANNER
 412         in_buffer = yy_scan_string(buf);
 413 #else
 414         in_buffer = buf;
 415 #endif
 416 }
 417
 418 /*
 419  * Do any cleanup necessary after parsing.
 420  */
 421 void
 422 lex_cleanup()
 423 {
 424 #ifdef FLEX_SCANNER
 425         if (in_buffer != NULL)
 426                 yy_delete_buffer(in_buffer);
 427         in_buffer = NULL;
 428 #endif
 429 }
 430
 431 /*
 432  * Also define a yywrap.  Note that if we're using flex, it will
 433  * define a macro to map this identifier to pcap_wrap.
 434  */
 435 int
 436 yywrap()
 437 {
 438         return 1;
 439 }
 440
 441 /* Hex digit to integer. */
 442 static inline int
 443 xdtoi(c)
 444         register int c;
 445 {
 446         if (isdigit(c))
 447                 return c - '0';
 448         else if (islower(c))
 449                 return c - 'a' + 10;
 450         else
 451                 return c - 'A' + 10;
 452 }
 453
 454 /*
 455  * Convert string to integer.  Just like atoi(), but checks for
 456  * preceding 0x or 0 and uses hex or octal instead of decimal.
 457  */
 458 static int
 459 stoi(s)
 460         char *s;
 461 {
 462         int base = 10;
 463         int n = 0;
 464
 465         if (*s == '0') {
 466                 if (s[1] == 'x' || s[1] == 'X') {
 467                         s += 2;
 468                         base = 16;
 469                 }
 470                 else {
 471                         base = 8;
 472                         s += 1;
 473                 }
 474         }
 475         while (*s)
 476                 n = n * base + xdtoi(*s++);
 477
 478         return n;
 479 }