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 1.99.2.5 2005-11-08 02:33:37 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 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
  83
  84 %a 18400
  85 %o 21500
  86 %e 7600
  87 %k 4550
  88 %p 27600
  89
  90 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
  91
  92 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
  93 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
  94 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
  95 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
  96 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
  97 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
  98 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
  99 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
 100
 101 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
 102 V661            {W}::{W}:{W}:{W}:{W}:{W}
 103 V662            {W}:{W}::{W}:{W}:{W}:{W}
 104 V663            {W}:{W}:{W}::{W}:{W}:{W}
 105 V664            {W}:{W}:{W}:{W}::{W}:{W}
 106 V665            {W}:{W}:{W}:{W}:{W}::{W}
 107 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 108
 109 V650            ::{W}:{W}:{W}:{W}:{W}
 110 V651            {W}::{W}:{W}:{W}:{W}
 111 V652            {W}:{W}::{W}:{W}:{W}
 112 V653            {W}:{W}:{W}::{W}:{W}
 113 V654            {W}:{W}:{W}:{W}::{W}
 114 V655            {W}:{W}:{W}:{W}:{W}::
 115
 116 V640            ::{W}:{W}:{W}:{W}
 117 V641            {W}::{W}:{W}:{W}
 118 V642            {W}:{W}::{W}:{W}
 119 V643            {W}:{W}:{W}::{W}
 120 V644            {W}:{W}:{W}:{W}::
 121
 122 V630            ::{W}:{W}:{W}
 123 V631            {W}::{W}:{W}
 124 V632            {W}:{W}::{W}
 125 V633            {W}:{W}:{W}::
 126
 127 V620            ::{W}:{W}
 128 V621            {W}::{W}
 129 V622            {W}:{W}::
 130
 131 V610            ::{W}
 132 V611            {W}::
 133
 134 V600            ::
 135
 136 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 137
 138 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 139 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 140 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 141 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 142 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 143 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 144
 145 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 146 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 147 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 148 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 149 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 150
 151 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 152 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 153 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 154 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 155
 156 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 157 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 158 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 159
 160 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 161 V6114           {W}::{N}\.{N}\.{N}\.{N}
 162
 163 V6004           ::{N}\.{N}\.{N}\.{N}
 164
 165
 166 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})
 167
 168 %%
 169 dst             return DST;
 170 src             return SRC;
 171
 172 link|ether|ppp|slip  return LINK;
 173 fddi|tr|wlan    return LINK;
 174 arp             return ARP;
 175 rarp            return RARP;
 176 ip              return IP;
 177 sctp            return SCTP;
 178 tcp             return TCP;
 179 udp             return UDP;
 180 icmp            return ICMP;
 181 igmp            return IGMP;
 182 igrp            return IGRP;
 183 pim             return PIM;
 184 vrrp            return VRRP;
 185 radio           return RADIO;
 186
 187 ip6             {
 188 #ifdef INET6
 189                 return IPV6;
 190 #else
 191                 bpf_error("%s not supported", yytext);
 192 #endif
 193                 }
 194 icmp6           {
 195 #ifdef INET6
 196                 return ICMPV6;
 197 #else
 198                 bpf_error("%s not supported", yytext);
 199 #endif
 200                 }
 201 ah              return AH;
 202 esp             return ESP;
 203
 204 atalk           return ATALK;
 205 aarp            return AARP;
 206 decnet          return DECNET;
 207 lat             return LAT;
 208 sca             return SCA;
 209 moprc           return MOPRC;
 210 mopdl           return MOPDL;
 211
 212 iso             return ISO;
 213 esis            return ESIS;
 214 es-is           return ESIS;
 215 isis            return ISIS;
 216 is-is           return ISIS;
 217 l1              return L1;
 218 l2              return L2;
 219 iih             return IIH;
 220 lsp             return LSP;
 221 snp             return SNP;
 222 csnp            return CSNP;
 223 psnp            return PSNP;
 224
 225 clnp            return CLNP;
 226
 227 stp             return STP;
 228
 229 ipx             return IPX;
 230
 231 netbeui         return NETBEUI;
 232
 233 host            return HOST;
 234 net             return NET;
 235 mask            return NETMASK;
 236 port            return PORT;
 237 portrange       return PORTRANGE;
 238 proto           return PROTO;
 239 protochain      {
 240 #ifdef NO_PROTOCHAIN
 241                   bpf_error("%s not supported", yytext);
 242 #else
 243                   return PROTOCHAIN;
 244 #endif
 245                 }
 246
 247 gateway         return GATEWAY;
 248
 249 less            return LESS;
 250 greater         return GREATER;
 251 byte            return CBYTE;
 252 broadcast       return TK_BROADCAST;
 253 multicast       return TK_MULTICAST;
 254
 255 and|"&&"        return AND;
 256 or|"||"         return OR;
 257 not             return '!';
 258
 259 len|length      return LEN;
 260 inbound         return INBOUND;
 261 outbound        return OUTBOUND;
 262
 263 vlan            return VLAN;
 264 mpls            return MPLS;
 265 pppoed          return PPPOED;
 266 pppoes          return PPPOES;
 267
 268 lane            return LANE;
 269 llc             return LLC;
 270 metac           return METAC;
 271 bcc             return BCC;
 272 oam             return OAM;
 273 oamf4           return OAMF4;
 274 oamf4ec         return OAMF4EC;
 275 oamf4sc         return OAMF4SC;
 276 sc              return SC;
 277 ilmic           return ILMIC;
 278 vpi             return VPI;
 279 vci             return VCI;
 280 connectmsg      return CONNECTMSG;
 281 metaconnect     return METACONNECT;
 282
 283 on|ifname       return PF_IFNAME;
 284 rset|ruleset    return PF_RSET;
 285 rnr|rulenum     return PF_RNR;
 286 srnr|subrulenum return PF_SRNR;
 287 reason          return PF_REASON;
 288 action          return PF_ACTION;
 289
 290 sio             return SIO;
 291 opc             return OPC;
 292 dpc             return DPC;
 293 sls             return SLS;
 294
 295 [ \r\n\t]               ;
 296 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 297 ">="                    return GEQ;
 298 "<="                    return LEQ;
 299 "!="                    return NEQ;
 300 "=="                    return '=';
 301 "<<"                    return LSH;
 302 ">>"                    return RSH;
 303 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 304                           return AID; }
 305 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 306 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 307                         yylval.s = sdup((char *)yytext); return HID; }
 308 {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
 309                           return EID; }
 310 {V6}                    {
 311 #ifdef INET6
 312                           struct addrinfo hints, *res;
 313                           memset(&hints, 0, sizeof(hints));
 314                           hints.ai_family = AF_INET6;
 315                           hints.ai_flags = AI_NUMERICHOST;
 316                           if (getaddrinfo(yytext, NULL, &hints, &res))
 317                                 bpf_error("bogus IPv6 address %s", yytext);
 318                           else {
 319                                 yylval.s = sdup((char *)yytext); return HID6;
 320                           }
 321 #else
 322                           bpf_error("IPv6 address %s not supported", yytext);
 323 #endif /*INET6*/
 324                         }
 325 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 326 icmptype                { yylval.i = 0; return NUM; }
 327 icmpcode                { yylval.i = 1; return NUM; }
 328 icmp-echoreply          { yylval.i = 0; return NUM; }
 329 icmp-unreach            { yylval.i = 3; return NUM; }
 330 icmp-sourcequench       { yylval.i = 4; return NUM; }
 331 icmp-redirect           { yylval.i = 5; return NUM; }
 332 icmp-echo               { yylval.i = 8; return NUM; }
 333 icmp-routeradvert       { yylval.i = 9; return NUM; }
 334 icmp-routersolicit      { yylval.i = 10; return NUM; }
 335 icmp-timxceed           { yylval.i = 11; return NUM; }
 336 icmp-paramprob          { yylval.i = 12; return NUM; }
 337 icmp-tstamp             { yylval.i = 13; return NUM; }
 338 icmp-tstampreply        { yylval.i = 14; return NUM; }
 339 icmp-ireq               { yylval.i = 15; return NUM; }
 340 icmp-ireqreply          { yylval.i = 16; return NUM; }
 341 icmp-maskreq            { yylval.i = 17; return NUM; }
 342 icmp-maskreply          { yylval.i = 18; return NUM; }
 343 tcpflags                { yylval.i = 13; return NUM; }
 344 tcp-fin                 { yylval.i = 0x01; return NUM; }
 345 tcp-syn                 { yylval.i = 0x02; return NUM; }
 346 tcp-rst                 { yylval.i = 0x04; return NUM; }
 347 tcp-push                { yylval.i = 0x08; return NUM; }
 348 tcp-ack                 { yylval.i = 0x10; return NUM; }
 349 tcp-urg                 { yylval.i = 0x20; return NUM; }
 350 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 351                          yylval.s = sdup((char *)yytext); return ID; }
 352 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 353 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 354                         bpf_error("illegal token: %s", yytext); }
 355 .                       { bpf_error("illegal char '%c'", *yytext); }
 356 %%
 357 void
 358 lex_init(buf)
 359         char *buf;
 360 {
 361 #ifdef FLEX_SCANNER
 362         in_buffer = yy_scan_string(buf);
 363 #else
 364         in_buffer = buf;
 365 #endif
 366 }
 367
 368 /*
 369  * Do any cleanup necessary after parsing.
 370  */
 371 void
 372 lex_cleanup()
 373 {
 374 #ifdef FLEX_SCANNER
 375         if (in_buffer != NULL)
 376                 yy_delete_buffer(in_buffer);
 377         in_buffer = NULL;
 378 #endif
 379 }
 380
 381 /*
 382  * Also define a yywrap.  Note that if we're using flex, it will
 383  * define a macro to map this identifier to pcap_wrap.
 384  */
 385 int
 386 yywrap()
 387 {
 388         return 1;
 389 }
 390
 391 /* Hex digit to integer. */
 392 static inline int
 393 xdtoi(c)
 394         register int c;
 395 {
 396         if (isdigit(c))
 397                 return c - '0';
 398         else if (islower(c))
 399                 return c - 'a' + 10;
 400         else
 401                 return c - 'A' + 10;
 402 }
 403
 404 /*
 405  * Convert string to integer.  Just like atoi(), but checks for
 406  * preceding 0x or 0 and uses hex or octal instead of decimal.
 407  */
 408 static int
 409 stoi(s)
 410         char *s;
 411 {
 412         int base = 10;
 413         int n = 0;
 414
 415         if (*s == '0') {
 416                 if (s[1] == 'x' || s[1] == 'X') {
 417                         s += 2;
 418                         base = 16;
 419                 }
 420                 else {
 421                         base = 8;
 422                         s += 1;
 423                 }
 424         }
 425         while (*s)
 426                 n = n * base + xdtoi(*s++);
 427
 428         return n;
 429 }