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 #ifndef lint
  24 static const char rcsid[] _U_ =
  25     "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.110.2.2 2008-02-06 10:21:47 guy Exp $ (LBL)";
  26 #endif
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <ctype.h>
  33 #include <string.h>
  34
  35 #include "pcap-int.h"
  36
  37 #include "gencode.h"
  38 #ifdef INET6
  39 #ifdef WIN32
  40 #include <pcap-stdinc.h>
  41
  42 #ifdef __MINGW32__
  43 #include "IP6_misc.h"
  44 #endif
  45 #else /* WIN32 */
  46 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
  47 #include <netdb.h>      /* for "struct addrinfo" */
  48 #endif /* WIN32 */
  49
  50 /* Workaround for AIX 4.3 */
  51 #if !defined(AI_NUMERICHOST)
  52 #define AI_NUMERICHOST 0x04
  53 #endif
  54 #endif /*INET6*/
  55 #include <pcap/namedb.h>
  56 #include "tokdefs.h"
  57
  58 #ifdef HAVE_OS_PROTO_H
  59 #include "os-proto.h"
  60 #endif
  61
  62 static int stoi(char *);
  63 static inline int xdtoi(int);
  64
  65 #ifdef FLEX_SCANNER
  66 #define YY_NO_UNPUT
  67 static YY_BUFFER_STATE in_buffer;
  68 #else
  69 static char *in_buffer;
  70
  71 #undef getc
  72 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  73 #endif
  74
  75 #define yylval pcap_lval
  76 extern YYSTYPE yylval;
  77
  78 %}
  79
  80 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
  81 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
  82 B2              ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f])
  83 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
  84
  85 %a 18400
  86 %o 21500
  87 %e 7600
  88 %k 4550
  89 %p 27600
  90 %n 2000
  91
  92 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
  93
  94 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
  95 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
  96 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
  97 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
  98 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
  99 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
 100 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
 101 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
 102
 103 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
 104 V661            {W}::{W}:{W}:{W}:{W}:{W}
 105 V662            {W}:{W}::{W}:{W}:{W}:{W}
 106 V663            {W}:{W}:{W}::{W}:{W}:{W}
 107 V664            {W}:{W}:{W}:{W}::{W}:{W}
 108 V665            {W}:{W}:{W}:{W}:{W}::{W}
 109 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 110
 111 V650            ::{W}:{W}:{W}:{W}:{W}
 112 V651            {W}::{W}:{W}:{W}:{W}
 113 V652            {W}:{W}::{W}:{W}:{W}
 114 V653            {W}:{W}:{W}::{W}:{W}
 115 V654            {W}:{W}:{W}:{W}::{W}
 116 V655            {W}:{W}:{W}:{W}:{W}::
 117
 118 V640            ::{W}:{W}:{W}:{W}
 119 V641            {W}::{W}:{W}:{W}
 120 V642            {W}:{W}::{W}:{W}
 121 V643            {W}:{W}:{W}::{W}
 122 V644            {W}:{W}:{W}:{W}::
 123
 124 V630            ::{W}:{W}:{W}
 125 V631            {W}::{W}:{W}
 126 V632            {W}:{W}::{W}
 127 V633            {W}:{W}:{W}::
 128
 129 V620            ::{W}:{W}
 130 V621            {W}::{W}
 131 V622            {W}:{W}::
 132
 133 V610            ::{W}
 134 V611            {W}::
 135
 136 V600            ::
 137
 138 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 139
 140 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 141 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 142 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 143 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 144 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 145 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 146
 147 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 148 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 149 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 150 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 151 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 152
 153 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 154 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 155 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 156 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 157
 158 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 159 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 160 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 161
 162 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 163 V6114           {W}::{N}\.{N}\.{N}\.{N}
 164
 165 V6004           ::{N}\.{N}\.{N}\.{N}
 166
 167
 168 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})
 169
 170 MAC             ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3})
 171
 172
 173
 174 %%
 175 dst             return DST;
 176 src             return SRC;
 177
 178 link|ether|ppp|slip  return LINK;
 179 fddi|tr|wlan    return LINK;
 180 arp             return ARP;
 181 rarp            return RARP;
 182 ip              return IP;
 183 sctp            return SCTP;
 184 tcp             return TCP;
 185 udp             return UDP;
 186 icmp            return ICMP;
 187 igmp            return IGMP;
 188 igrp            return IGRP;
 189 pim             return PIM;
 190 vrrp            return VRRP;
 191 radio           return RADIO;
 192
 193 ip6             {
 194 #ifdef INET6
 195                 return IPV6;
 196 #else
 197                 bpf_error("%s not supported", yytext);
 198 #endif
 199                 }
 200 icmp6           {
 201 #ifdef INET6
 202                 return ICMPV6;
 203 #else
 204                 bpf_error("%s not supported", yytext);
 205 #endif
 206                 }
 207 ah              return AH;
 208 esp             return ESP;
 209
 210 atalk           return ATALK;
 211 aarp            return AARP;
 212 decnet          return DECNET;
 213 lat             return LAT;
 214 sca             return SCA;
 215 moprc           return MOPRC;
 216 mopdl           return MOPDL;
 217
 218 iso             return ISO;
 219 esis            return ESIS;
 220 es-is           return ESIS;
 221 isis            return ISIS;
 222 is-is           return ISIS;
 223 l1              return L1;
 224 l2              return L2;
 225 iih             return IIH;
 226 lsp             return LSP;
 227 snp             return SNP;
 228 csnp            return CSNP;
 229 psnp            return PSNP;
 230
 231 clnp            return CLNP;
 232
 233 stp             return STP;
 234
 235 ipx             return IPX;
 236
 237 netbeui         return NETBEUI;
 238
 239 host            return HOST;
 240 net             return NET;
 241 mask            return NETMASK;
 242 port            return PORT;
 243 portrange       return PORTRANGE;
 244 proto           return PROTO;
 245 protochain      {
 246 #ifdef NO_PROTOCHAIN
 247                   bpf_error("%s not supported", yytext);
 248 #else
 249                   return PROTOCHAIN;
 250 #endif
 251                 }
 252
 253 gateway         return GATEWAY;
 254
 255 type            return TYPE;
 256 subtype         return SUBTYPE;
 257 direction|dir   return DIR;
 258 address1|addr1  return ADDR1;
 259 address2|addr2  return ADDR2;
 260 address3|addr3  return ADDR3;
 261 address4|addr4  return ADDR4;
 262
 263 less            return LESS;
 264 greater         return GREATER;
 265 byte            return CBYTE;
 266 broadcast       return TK_BROADCAST;
 267 multicast       return TK_MULTICAST;
 268
 269 and|"&&"        return AND;
 270 or|"||"         return OR;
 271 not             return '!';
 272
 273 len|length      return LEN;
 274 inbound         return INBOUND;
 275 outbound        return OUTBOUND;
 276
 277 vlan            return VLAN;
 278 mpls            return MPLS;
 279 pppoed          return PPPOED;
 280 pppoes          return PPPOES;
 281
 282 lane            return LANE;
 283 llc             return LLC;
 284 metac           return METAC;
 285 bcc             return BCC;
 286 oam             return OAM;
 287 oamf4           return OAMF4;
 288 oamf4ec         return OAMF4EC;
 289 oamf4sc         return OAMF4SC;
 290 sc              return SC;
 291 ilmic           return ILMIC;
 292 vpi             return VPI;
 293 vci             return VCI;
 294 connectmsg      return CONNECTMSG;
 295 metaconnect     return METACONNECT;
 296
 297 on|ifname       return PF_IFNAME;
 298 rset|ruleset    return PF_RSET;
 299 rnr|rulenum     return PF_RNR;
 300 srnr|subrulenum return PF_SRNR;
 301 reason          return PF_REASON;
 302 action          return PF_ACTION;
 303
 304 fisu            return FISU;
 305 lssu            return LSSU;
 306 lsu             return LSSU;
 307 msu             return MSU;
 308 sio             return SIO;
 309 opc             return OPC;
 310 dpc             return DPC;
 311 sls             return SLS;
 312
 313 [ \r\n\t]               ;
 314 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 315 ">="                    return GEQ;
 316 "<="                    return LEQ;
 317 "!="                    return NEQ;
 318 "=="                    return '=';
 319 "<<"                    return LSH;
 320 ">>"                    return RSH;
 321 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 322                           return AID; }
 323 {MAC}                   { yylval.e = pcap_ether_aton((char *)yytext);
 324                           return EID; }
 325 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 326 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 327                         yylval.s = sdup((char *)yytext); return HID; }
 328 {V6}                    {
 329 #ifdef INET6
 330                           struct addrinfo hints, *res;
 331                           memset(&hints, 0, sizeof(hints));
 332                           hints.ai_family = AF_INET6;
 333                           hints.ai_flags = AI_NUMERICHOST;
 334                           if (getaddrinfo(yytext, NULL, &hints, &res))
 335                                 bpf_error("bogus IPv6 address %s", yytext);
 336                           else {
 337                                 yylval.s = sdup((char *)yytext); return HID6;
 338                           }
 339 #else
 340                           bpf_error("IPv6 address %s not supported", yytext);
 341 #endif /*INET6*/
 342                         }
 343 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 344 icmptype                { yylval.i = 0; return NUM; }
 345 icmpcode                { yylval.i = 1; return NUM; }
 346 icmp-echoreply          { yylval.i = 0; return NUM; }
 347 icmp-unreach            { yylval.i = 3; return NUM; }
 348 icmp-sourcequench       { yylval.i = 4; return NUM; }
 349 icmp-redirect           { yylval.i = 5; return NUM; }
 350 icmp-echo               { yylval.i = 8; return NUM; }
 351 icmp-routeradvert       { yylval.i = 9; return NUM; }
 352 icmp-routersolicit      { yylval.i = 10; return NUM; }
 353 icmp-timxceed           { yylval.i = 11; return NUM; }
 354 icmp-paramprob          { yylval.i = 12; return NUM; }
 355 icmp-tstamp             { yylval.i = 13; return NUM; }
 356 icmp-tstampreply        { yylval.i = 14; return NUM; }
 357 icmp-ireq               { yylval.i = 15; return NUM; }
 358 icmp-ireqreply          { yylval.i = 16; return NUM; }
 359 icmp-maskreq            { yylval.i = 17; return NUM; }
 360 icmp-maskreply          { yylval.i = 18; return NUM; }
 361 tcpflags                { yylval.i = 13; return NUM; }
 362 tcp-fin                 { yylval.i = 0x01; return NUM; }
 363 tcp-syn                 { yylval.i = 0x02; return NUM; }
 364 tcp-rst                 { yylval.i = 0x04; return NUM; }
 365 tcp-push                { yylval.i = 0x08; return NUM; }
 366 tcp-ack                 { yylval.i = 0x10; return NUM; }
 367 tcp-urg                 { yylval.i = 0x20; return NUM; }
 368 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 369                          yylval.s = sdup((char *)yytext); return ID; }
 370 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 371 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 372                         bpf_error("illegal token: %s", yytext); }
 373 .                       { bpf_error("illegal char '%c'", *yytext); }
 374 %%
 375 void
 376 lex_init(buf)
 377         const char *buf;
 378 {
 379 #ifdef FLEX_SCANNER
 380         in_buffer = yy_scan_string(buf);
 381 #else
 382         in_buffer = buf;
 383 #endif
 384 }
 385
 386 /*
 387  * Do any cleanup necessary after parsing.
 388  */
 389 void
 390 lex_cleanup()
 391 {
 392 #ifdef FLEX_SCANNER
 393         if (in_buffer != NULL)
 394                 yy_delete_buffer(in_buffer);
 395         in_buffer = NULL;
 396 #endif
 397 }
 398
 399 /*
 400  * Also define a yywrap.  Note that if we're using flex, it will
 401  * define a macro to map this identifier to pcap_wrap.
 402  */
 403 int
 404 yywrap()
 405 {
 406         return 1;
 407 }
 408
 409 /* Hex digit to integer. */
 410 static inline int
 411 xdtoi(c)
 412         register int c;
 413 {
 414         if (isdigit(c))
 415                 return c - '0';
 416         else if (islower(c))
 417                 return c - 'a' + 10;
 418         else
 419                 return c - 'A' + 10;
 420 }
 421
 422 /*
 423  * Convert string to integer.  Just like atoi(), but checks for
 424  * preceding 0x or 0 and uses hex or octal instead of decimal.
 425  */
 426 static int
 427 stoi(s)
 428         char *s;
 429 {
 430         int base = 10;
 431         int n = 0;
 432
 433         if (*s == '0') {
 434                 if (s[1] == 'x' || s[1] == 'X') {
 435                         s += 2;
 436                         base = 16;
 437                 }
 438                 else {
 439                         base = 8;
 440                         s += 1;
 441                 }
 442         }
 443         while (*s)
 444                 n = n * base + xdtoi(*s++);
 445
 446         return n;
 447 }