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[] =
  25     "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.86 2002-07-11 09:06:46 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 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */
  40 #include <netdb.h>      /* for "struct addrinfo" */
  41 /* Workaround for AIX 4.3 */
  42 #if !defined(AI_NUMERICHOST)
  43 #define AI_NUMERICHOST 0x04
  44 #endif
  45 #endif /*INET6*/
  46 #include <pcap-namedb.h>
  47 #include "tokdefs.h"
  48
  49 #ifdef HAVE_OS_PROTO_H
  50 #include "os-proto.h"
  51 #endif
  52
  53 static int stoi(char *);
  54 static inline int xdtoi(int);
  55
  56 #ifdef FLEX_SCANNER
  57 #define YY_NO_UNPUT
  58 static YY_BUFFER_STATE in_buffer;
  59 #else
  60 static char *in_buffer;
  61
  62 #undef getc
  63 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  64 #endif
  65
  66 #define yylval pcap_lval
  67 extern YYSTYPE yylval;
  68
  69 %}
  70
  71 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
  72 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
  73 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
  74
  75 %a 15000
  76 %o 19000
  77 %e 6000
  78 %k 4000
  79 %p 21000
  80 %n 2000
  81
  82 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
  83
  84 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
  85 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
  86 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
  87 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
  88 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
  89 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
  90 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
  91 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
  92
  93 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
  94 V661            {W}::{W}:{W}:{W}:{W}:{W}
  95 V662            {W}:{W}::{W}:{W}:{W}:{W}
  96 V663            {W}:{W}:{W}::{W}:{W}:{W}
  97 V664            {W}:{W}:{W}:{W}::{W}:{W}
  98 V665            {W}:{W}:{W}:{W}:{W}::{W}
  99 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 100
 101 V650            ::{W}:{W}:{W}:{W}:{W}
 102 V651            {W}::{W}:{W}:{W}:{W}
 103 V652            {W}:{W}::{W}:{W}:{W}
 104 V653            {W}:{W}:{W}::{W}:{W}
 105 V654            {W}:{W}:{W}:{W}::{W}
 106 V655            {W}:{W}:{W}:{W}:{W}::
 107
 108 V640            ::{W}:{W}:{W}:{W}
 109 V641            {W}::{W}:{W}:{W}
 110 V642            {W}:{W}::{W}:{W}
 111 V643            {W}:{W}:{W}::{W}
 112 V644            {W}:{W}:{W}:{W}::
 113
 114 V630            ::{W}:{W}:{W}
 115 V631            {W}::{W}:{W}
 116 V632            {W}:{W}::{W}
 117 V633            {W}:{W}:{W}::
 118
 119 V620            ::{W}:{W}
 120 V621            {W}::{W}
 121 V622            {W}:{W}::
 122
 123 V610            ::{W}
 124 V611            {W}::
 125
 126 V600            ::
 127
 128 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 129
 130 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 131 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 132 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 133 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 134 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 135 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 136
 137 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 138 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 139 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 140 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 141 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 142
 143 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 144 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 145 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 146 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 147
 148 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 149 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 150 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 151
 152 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 153 V6114           {W}::{N}\.{N}\.{N}\.{N}
 154
 155 V6004           ::{N}\.{N}\.{N}\.{N}
 156
 157
 158 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})
 159
 160 %%
 161 dst             return DST;
 162 src             return SRC;
 163
 164 link|ether|ppp|slip  return LINK;
 165 fddi|tr         return LINK;
 166 arp             return ARP;
 167 rarp            return RARP;
 168 ip              return IP;
 169 sctp            return SCTP;
 170 tcp             return TCP;
 171 udp             return UDP;
 172 icmp            return ICMP;
 173 igmp            return IGMP;
 174 igrp            return IGRP;
 175 pim             return PIM;
 176 vrrp            return VRRP;
 177
 178 ip6             {
 179 #ifdef INET6
 180                 return IPV6;
 181 #else
 182                 bpf_error("%s not supported", yytext);
 183 #endif
 184                 }
 185 icmp6           {
 186 #ifdef INET6
 187                 return ICMPV6;
 188 #else
 189                 bpf_error("%s not supported", yytext);
 190 #endif
 191                 }
 192 ah              return AH;
 193 esp             return ESP;
 194
 195 atalk           return ATALK;
 196 aarp            return AARP;
 197 decnet          return DECNET;
 198 lat             return LAT;
 199 sca             return SCA;
 200 moprc           return MOPRC;
 201 mopdl           return MOPDL;
 202
 203 iso             return ISO;
 204 esis            return ESIS;
 205 es-is           return ESIS;
 206 isis            return ISIS;
 207 is-is           return ISIS;
 208 clnp            return CLNP;
 209
 210 stp             return STP;
 211
 212 ipx             return IPX;
 213
 214 netbeui         return NETBEUI;
 215
 216 host            return HOST;
 217 net             return NET;
 218 mask            return MASK;
 219 port            return PORT;
 220 proto           return PROTO;
 221 protochain      {
 222 #ifdef NO_PROTOCHAIN
 223                   bpf_error("%s not supported", yytext);
 224 #else
 225                   return PROTOCHAIN;
 226 #endif
 227                 }
 228
 229 gateway         return GATEWAY;
 230
 231 less            return LESS;
 232 greater         return GREATER;
 233 byte            return BYTE;
 234 broadcast       return TK_BROADCAST;
 235 multicast       return TK_MULTICAST;
 236
 237 and|"&&"        return AND;
 238 or|"||"         return OR;
 239 not             return '!';
 240
 241 len|length      return LEN;
 242 inbound         return INBOUND;
 243 outbound        return OUTBOUND;
 244
 245 vlan            return VLAN;
 246
 247 lane            return LANE;
 248 llc             return LLC;
 249 metac           return METAC;
 250 bcc             return BCC;
 251 oam             return OAM;
 252 oamf4           return OAMF4;
 253 oamf4ec         return OAMF4EC;
 254 oamf4sc         return OAMF4SC;
 255 sc              return SC;
 256 ilmic           return ILMIC;
 257 vpi             return VPI;
 258 vci             return VCI;
 259 connectmsg      return CONNECTMSG;
 260 metaconnect     return METACONNECT;
 261
 262 [ \n\t]                 ;
 263 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 264 ">="                    return GEQ;
 265 "<="                    return LEQ;
 266 "!="                    return NEQ;
 267 "=="                    return '=';
 268 "<<"                    return LSH;
 269 ">>"                    return RSH;
 270 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 271                           return AID; }
 272 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 273 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 274                         yylval.s = sdup((char *)yytext); return HID; }
 275 {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
 276                           return EID; }
 277 {V6}                    {
 278 #ifdef INET6
 279                           struct addrinfo hints, *res;
 280                           memset(&hints, 0, sizeof(hints));
 281                           hints.ai_family = AF_INET6;
 282                           hints.ai_flags = AI_NUMERICHOST;
 283                           if (getaddrinfo(yytext, NULL, &hints, &res))
 284                                 bpf_error("bogus IPv6 address %s", yytext);
 285                           else {
 286                                 yylval.e = sdup((char *)yytext); return HID6;
 287                           }
 288 #else
 289                           bpf_error("IPv6 address %s not supported", yytext);
 290 #endif /*INET6*/
 291                         }
 292 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 293 icmptype                { yylval.i = 0; return NUM; }
 294 icmpcode                { yylval.i = 1; return NUM; }
 295 icmp-echoreply          { yylval.i = 0; return NUM; }
 296 icmp-unreach            { yylval.i = 3; return NUM; }
 297 icmp-sourcequench       { yylval.i = 4; return NUM; }
 298 icmp-redirect           { yylval.i = 5; return NUM; }
 299 icmp-echo               { yylval.i = 8; return NUM; }
 300 icmp-routeradvert       { yylval.i = 9; return NUM; }
 301 icmp-routersolicit      { yylval.i = 10; return NUM; }
 302 icmp-timxceed           { yylval.i = 11; return NUM; }
 303 icmp-paramprob          { yylval.i = 12; return NUM; }
 304 icmp-tstamp             { yylval.i = 13; return NUM; }
 305 icmp-tstampreply        { yylval.i = 14; return NUM; }
 306 icmp-ireq               { yylval.i = 15; return NUM; }
 307 icmp-ireqreply          { yylval.i = 16; return NUM; }
 308 icmp-maskreq            { yylval.i = 17; return NUM; }
 309 icmp-maskreply          { yylval.i = 18; return NUM; }
 310 tcpflags                { yylval.i = 13; return NUM; }
 311 tcp-fin                 { yylval.i = 0x01; return NUM; }
 312 tcp-syn                 { yylval.i = 0x02; return NUM; }
 313 tcp-rst                 { yylval.i = 0x04; return NUM; }
 314 tcp-push                { yylval.i = 0x08; return NUM; }
 315 tcp-ack                 { yylval.i = 0x10; return NUM; }
 316 tcp-urg                 { yylval.i = 0x20; return NUM; }
 317 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 318                          yylval.s = sdup((char *)yytext); return ID; }
 319 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 320 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 321                         bpf_error("illegal token: %s", yytext); }
 322 .                       { bpf_error("illegal char '%c'", *yytext); }
 323 %%
 324 void
 325 lex_init(buf)
 326         char *buf;
 327 {
 328 #ifdef FLEX_SCANNER
 329         in_buffer = yy_scan_string(buf);
 330 #else
 331         in_buffer = buf;
 332 #endif
 333 }
 334
 335 /*
 336  * Do any cleanup necessary after parsing.
 337  */
 338 void
 339 lex_cleanup()
 340 {
 341 #ifdef FLEX_SCANNER
 342         if (in_buffer != NULL)
 343                 yy_delete_buffer(in_buffer);
 344         in_buffer = NULL;
 345 #endif
 346 }
 347
 348 /*
 349  * Also define a yywrap.  Note that if we're using flex, it will
 350  * define a macro to map this identifier to pcap_wrap.
 351  */
 352 int
 353 yywrap()
 354 {
 355         return 1;
 356 }
 357
 358 /* Hex digit to integer. */
 359 static inline int
 360 xdtoi(c)
 361         register int c;
 362 {
 363         if (isdigit(c))
 364                 return c - '0';
 365         else if (islower(c))
 366                 return c - 'a' + 10;
 367         else
 368                 return c - 'A' + 10;
 369 }
 370
 371 /*
 372  * Convert string to integer.  Just like atoi(), but checks for
 373  * preceding 0x or 0 and uses hex or octal instead of decimal.
 374  */
 375 static int
 376 stoi(s)
 377         char *s;
 378 {
 379         int base = 10;
 380         int n = 0;
 381
 382         if (*s == '0') {
 383                 if (s[1] == 'x' || s[1] == 'X') {
 384                         s += 2;
 385                         base = 16;
 386                 }
 387                 else {
 388                         base = 8;
 389                         s += 1;
 390                 }
 391         }
 392         while (*s)
 393                 n = n * base + xdtoi(*s++);
 394
 395         return n;
 396 }