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 /* _WIN32 */
  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 /* _WIN32 */
  36
  37 #include <ctype.h>
  38 #include <string.h>
  39
  40 #include "pcap-int.h"
  41
  42 #include "gencode.h"
  43 #ifdef INET6
  44 #ifdef _WIN32
  45 #include <pcap-stdinc.h>
  46
  47 #ifdef __MINGW32__
  48 #include "ip6_misc.h"
  49 #endif
  50 #else /* _WIN32 */
  51 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
  52 #include <netdb.h>      /* for "struct addrinfo" */
  53 #endif /* _WIN32 */
  54
  55 /* Workaround for AIX 4.3 */
  56 #if !defined(AI_NUMERICHOST)
  57 #define AI_NUMERICHOST 0x04
  58 #endif
  59 #endif /*INET6*/
  60 #include <pcap/namedb.h>
  61 #include "tokdefs.h"
  62
  63 #ifdef HAVE_OS_PROTO_H
  64 #include "os-proto.h"
  65 #endif
  66
  67 static int stoi(char *);
  68 static inline int xdtoi(int);
  69
  70 #ifdef FLEX_SCANNER
  71 #define YY_NO_INPUT
  72 #define YY_NO_UNPUT
  73 static YY_BUFFER_STATE in_buffer;
  74 #else
  75 static const char *in_buffer;
  76
  77 #undef getc
  78 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  79 #endif
  80
  81 #define yylval pcap_lval
  82 extern YYSTYPE yylval;
  83
  84 %}
  85
  86 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
  87 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
  88 B2              ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])
  89 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
  90
  91 %a 18400
  92 %o 21500
  93 %e 7600
  94 %k 4550
  95 %p 27600
  96 %n 2000
  97
  98 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
  99
 100 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
 101 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
 102 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
 103 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
 104 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
 105 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
 106 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
 107 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
 108
 109 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
 110 V661            {W}::{W}:{W}:{W}:{W}:{W}
 111 V662            {W}:{W}::{W}:{W}:{W}:{W}
 112 V663            {W}:{W}:{W}::{W}:{W}:{W}
 113 V664            {W}:{W}:{W}:{W}::{W}:{W}
 114 V665            {W}:{W}:{W}:{W}:{W}::{W}
 115 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 116
 117 V650            ::{W}:{W}:{W}:{W}:{W}
 118 V651            {W}::{W}:{W}:{W}:{W}
 119 V652            {W}:{W}::{W}:{W}:{W}
 120 V653            {W}:{W}:{W}::{W}:{W}
 121 V654            {W}:{W}:{W}:{W}::{W}
 122 V655            {W}:{W}:{W}:{W}:{W}::
 123
 124 V640            ::{W}:{W}:{W}:{W}
 125 V641            {W}::{W}:{W}:{W}
 126 V642            {W}:{W}::{W}:{W}
 127 V643            {W}:{W}:{W}::{W}
 128 V644            {W}:{W}:{W}:{W}::
 129
 130 V630            ::{W}:{W}:{W}
 131 V631            {W}::{W}:{W}
 132 V632            {W}:{W}::{W}
 133 V633            {W}:{W}:{W}::
 134
 135 V620            ::{W}:{W}
 136 V621            {W}::{W}
 137 V622            {W}:{W}::
 138
 139 V610            ::{W}
 140 V611            {W}::
 141
 142 V600            ::
 143
 144 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 145
 146 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 147 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 148 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 149 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 150 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 151 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 152
 153 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 154 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 155 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 156 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 157 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 158
 159 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 160 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 161 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 162 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 163
 164 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 165 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 166 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 167
 168 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 169 V6114           {W}::{N}\.{N}\.{N}\.{N}
 170
 171 V6004           ::{N}\.{N}\.{N}\.{N}
 172
 173
 174 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})
 175
 176 MAC             ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3})
 177
 178
 179
 180 %%
 181 dst             return DST;
 182 src             return SRC;
 183
 184 link|ether|ppp|slip  return LINK;
 185 fddi|tr|wlan    return LINK;
 186 arp             return ARP;
 187 rarp            return RARP;
 188 ip              return IP;
 189 sctp            return SCTP;
 190 tcp             return TCP;
 191 udp             return UDP;
 192 icmp            return ICMP;
 193 igmp            return IGMP;
 194 igrp            return IGRP;
 195 pim             return PIM;
 196 vrrp            return VRRP;
 197 carp            return CARP;
 198 radio           return RADIO;
 199
 200 ip6             return IPV6;
 201 icmp6           return ICMPV6;
 202 ah              return AH;
 203 esp             return ESP;
 204
 205 atalk           return ATALK;
 206 aarp            return AARP;
 207 decnet          return DECNET;
 208 lat             return LAT;
 209 sca             return SCA;
 210 moprc           return MOPRC;
 211 mopdl           return MOPDL;
 212
 213 iso             return ISO;
 214 esis            return ESIS;
 215 es-is           return ESIS;
 216 isis            return ISIS;
 217 is-is           return ISIS;
 218 l1              return L1;
 219 l2              return L2;
 220 iih             return IIH;
 221 lsp             return LSP;
 222 snp             return SNP;
 223 csnp            return CSNP;
 224 psnp            return PSNP;
 225
 226 clnp            return CLNP;
 227
 228 stp             return STP;
 229
 230 ipx             return IPX;
 231
 232 netbeui         return NETBEUI;
 233
 234 host            return HOST;
 235 net             return NET;
 236 mask            return NETMASK;
 237 port            return PORT;
 238 portrange       return PORTRANGE;
 239 proto           return PROTO;
 240 protochain      {
 241 #ifdef NO_PROTOCHAIN
 242                   bpf_error("%s not supported", yytext);
 243 #else
 244                   return PROTOCHAIN;
 245 #endif
 246                 }
 247
 248 gateway         return GATEWAY;
 249
 250 type            return TYPE;
 251 subtype         return SUBTYPE;
 252 direction|dir   return DIR;
 253 address1|addr1  return ADDR1;
 254 address2|addr2  return ADDR2;
 255 address3|addr3  return ADDR3;
 256 address4|addr4  return ADDR4;
 257 ra              return RA;
 258 ta              return TA;
 259
 260 less            return LESS;
 261 greater         return GREATER;
 262 byte            return CBYTE;
 263 broadcast       return TK_BROADCAST;
 264 multicast       return TK_MULTICAST;
 265
 266 and|"&&"        return AND;
 267 or|"||"         return OR;
 268 not             return '!';
 269
 270 len|length      return LEN;
 271 inbound         return INBOUND;
 272 outbound        return OUTBOUND;
 273
 274 vlan            return VLAN;
 275 mpls            return MPLS;
 276 pppoed          return PPPOED;
 277 pppoes          return PPPOES;
 278 geneve          return GENEVE;
 279
 280 lane            return LANE;
 281 llc             return LLC;
 282 metac           return METAC;
 283 bcc             return BCC;
 284 oam             return OAM;
 285 oamf4           return OAMF4;
 286 oamf4ec         return OAMF4EC;
 287 oamf4sc         return OAMF4SC;
 288 sc              return SC;
 289 ilmic           return ILMIC;
 290 vpi             return VPI;
 291 vci             return VCI;
 292 connectmsg      return CONNECTMSG;
 293 metaconnect     return METACONNECT;
 294
 295 on|ifname       return PF_IFNAME;
 296 rset|ruleset    return PF_RSET;
 297 rnr|rulenum     return PF_RNR;
 298 srnr|subrulenum return PF_SRNR;
 299 reason          return PF_REASON;
 300 action          return PF_ACTION;
 301
 302 fisu            return FISU;
 303 lssu            return LSSU;
 304 lsu             return LSSU;
 305 msu             return MSU;
 306 hfisu           return HFISU;
 307 hlssu           return HLSSU;
 308 hmsu            return HMSU;
 309 sio             return SIO;
 310 opc             return OPC;
 311 dpc             return DPC;
 312 sls             return SLS;
 313 hsio            return HSIO;
 314 hopc            return HOPC;
 315 hdpc            return HDPC;
 316 hsls            return HSLS;
 317
 318 [ \r\n\t]               ;
 319 [+\-*/%:\[\]!<>()&|\^=] return yytext[0];
 320 ">="                    return GEQ;
 321 "<="                    return LEQ;
 322 "!="                    return NEQ;
 323 "=="                    return '=';
 324 "<<"                    return LSH;
 325 ">>"                    return RSH;
 326 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 327                           if (yylval.e == NULL)
 328                                 bpf_error("malloc");
 329                           return AID; }
 330 {MAC}                   { yylval.e = pcap_ether_aton((char *)yytext);
 331                           if (yylval.e == NULL)
 332                                 bpf_error("malloc");
 333                           return EID; }
 334 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 335 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 336                         yylval.s = sdup((char *)yytext); return HID; }
 337 {V6}                    {
 338 #ifdef INET6
 339                           struct addrinfo hints, *res;
 340                           memset(&hints, 0, sizeof(hints));
 341                           hints.ai_family = AF_INET6;
 342                           hints.ai_flags = AI_NUMERICHOST;
 343                           if (getaddrinfo(yytext, NULL, &hints, &res))
 344                                 bpf_error("bogus IPv6 address %s", yytext);
 345                           else {
 346                                 freeaddrinfo(res);
 347                                 yylval.s = sdup((char *)yytext); return HID6;
 348                           }
 349 #else
 350                           bpf_error("IPv6 address %s not supported", yytext);
 351 #endif /*INET6*/
 352                         }
 353 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 354 icmptype                { yylval.i = 0; return NUM; }
 355 icmpcode                { yylval.i = 1; return NUM; }
 356 icmp-echoreply          { yylval.i = 0; return NUM; }
 357 icmp-unreach            { yylval.i = 3; return NUM; }
 358 icmp-sourcequench       { yylval.i = 4; return NUM; }
 359 icmp-redirect           { yylval.i = 5; return NUM; }
 360 icmp-echo               { yylval.i = 8; return NUM; }
 361 icmp-routeradvert       { yylval.i = 9; return NUM; }
 362 icmp-routersolicit      { yylval.i = 10; return NUM; }
 363 icmp-timxceed           { yylval.i = 11; return NUM; }
 364 icmp-paramprob          { yylval.i = 12; return NUM; }
 365 icmp-tstamp             { yylval.i = 13; return NUM; }
 366 icmp-tstampreply        { yylval.i = 14; return NUM; }
 367 icmp-ireq               { yylval.i = 15; return NUM; }
 368 icmp-ireqreply          { yylval.i = 16; return NUM; }
 369 icmp-maskreq            { yylval.i = 17; return NUM; }
 370 icmp-maskreply          { yylval.i = 18; return NUM; }
 371 tcpflags                { yylval.i = 13; return NUM; }
 372 tcp-fin                 { yylval.i = 0x01; return NUM; }
 373 tcp-syn                 { yylval.i = 0x02; return NUM; }
 374 tcp-rst                 { yylval.i = 0x04; return NUM; }
 375 tcp-push                { yylval.i = 0x08; return NUM; }
 376 tcp-ack                 { yylval.i = 0x10; return NUM; }
 377 tcp-urg                 { yylval.i = 0x20; 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 }