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 1.81 2001-09-14 01:40:57 fenner Exp $ (LBL)";
  26 #endif
  27
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <sys/types.h>
  33 #include <sys/time.h>
  34
  35 #include <ctype.h>
  36 #include <unistd.h>
  37 #include <string.h>
  38
  39 #include "pcap-int.h"
  40
  41 #include "gencode.h"
  42 #include <pcap-namedb.h>
  43 #ifdef INET6
  44 #include <netdb.h>
  45 #include <sys/socket.h>
  46 /* Workaround for AIX 4.3 */
  47 #if !defined(AI_NUMERICHOST)
  48 #define AI_NUMERICHOST 0x04
  49 #endif
  50 #endif /*INET6*/
  51 #include "tokdefs.h"
  52
  53 #ifdef HAVE_OS_PROTO_H
  54 #include "os-proto.h"
  55 #endif
  56
  57 static int stoi(char *);
  58 static inline int xdtoi(int);
  59
  60 #ifdef FLEX_SCANNER
  61 #define YY_NO_UNPUT
  62 static YY_BUFFER_STATE in_buffer;
  63 #else
  64 static char *in_buffer;
  65
  66 #undef getc
  67 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  68 #endif
  69
  70 #define yylval pcap_lval
  71 extern YYSTYPE yylval;
  72
  73 %}
  74
  75 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
  76 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
  77 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
  78
  79 %a 15000
  80 %o 17000
  81 %e 6000
  82 %k 4000
  83 %p 19000
  84 %n 2000
  85
  86 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
  87
  88 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
  89 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
  90 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
  91 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
  92 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
  93 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
  94 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
  95 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
  96
  97 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
  98 V661            {W}::{W}:{W}:{W}:{W}:{W}
  99 V662            {W}:{W}::{W}:{W}:{W}:{W}
 100 V663            {W}:{W}:{W}::{W}:{W}:{W}
 101 V664            {W}:{W}:{W}:{W}::{W}:{W}
 102 V665            {W}:{W}:{W}:{W}:{W}::{W}
 103 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 104
 105 V650            ::{W}:{W}:{W}:{W}:{W}
 106 V651            {W}::{W}:{W}:{W}:{W}
 107 V652            {W}:{W}::{W}:{W}:{W}
 108 V653            {W}:{W}:{W}::{W}:{W}
 109 V654            {W}:{W}:{W}:{W}::{W}
 110 V655            {W}:{W}:{W}:{W}:{W}::
 111
 112 V640            ::{W}:{W}:{W}:{W}
 113 V641            {W}::{W}:{W}:{W}
 114 V642            {W}:{W}::{W}:{W}
 115 V643            {W}:{W}:{W}::{W}
 116 V644            {W}:{W}:{W}:{W}::
 117
 118 V630            ::{W}:{W}:{W}
 119 V631            {W}::{W}:{W}
 120 V632            {W}:{W}::{W}
 121 V633            {W}:{W}:{W}::
 122
 123 V620            ::{W}:{W}
 124 V621            {W}::{W}
 125 V622            {W}:{W}::
 126
 127 V610            ::{W}
 128 V611            {W}::
 129
 130 V600            ::
 131
 132 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 133
 134 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 135 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 136 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 137 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 138 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 139 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 140
 141 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 142 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 143 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 144 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 145 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 146
 147 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 148 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 149 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 150 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 151
 152 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 153 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 154 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 155
 156 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 157 V6114           {W}::{N}\.{N}\.{N}\.{N}
 158
 159 V6004           ::{N}\.{N}\.{N}\.{N}
 160
 161
 162 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})
 163
 164 %%
 165 dst             return DST;
 166 src             return SRC;
 167
 168 link|ether|ppp|slip  return LINK;
 169 fddi|tr         return LINK;
 170 arp             return ARP;
 171 rarp            return RARP;
 172 ip              return IP;
 173 sctp            return SCTP;
 174 tcp             return TCP;
 175 udp             return UDP;
 176 icmp            return ICMP;
 177 igmp            return IGMP;
 178 igrp            return IGRP;
 179 pim             return PIM;
 180 vrrp            return VRRP;
 181
 182 ip6             {
 183 #ifdef INET6
 184                 return IPV6;
 185 #else
 186                 bpf_error("%s not supported", yytext);
 187 #endif
 188                 }
 189 icmp6           {
 190 #ifdef INET6
 191                 return ICMPV6;
 192 #else
 193                 bpf_error("%s not supported", yytext);
 194 #endif
 195                 }
 196 ah              return AH;
 197 esp             return ESP;
 198
 199 atalk           return ATALK;
 200 aarp            return AARP;
 201 decnet          return DECNET;
 202 lat             return LAT;
 203 sca             return SCA;
 204 moprc           return MOPRC;
 205 mopdl           return MOPDL;
 206
 207 iso             return ISO;
 208 esis            return ESIS;
 209 es-is           return ESIS;
 210 isis            return ISIS;
 211 is-is           return ISIS;
 212 clnp            return CLNP;
 213
 214 stp             return STP;
 215
 216 ipx             return IPX;
 217
 218 netbeui         return NETBEUI;
 219
 220 host            return HOST;
 221 net             return NET;
 222 mask            return MASK;
 223 port            return PORT;
 224 proto           return PROTO;
 225 protochain      {
 226 #ifdef NO_PROTOCHAIN
 227                   bpf_error("%s not supported", yytext);
 228 #else
 229                   return PROTOCHAIN;
 230 #endif
 231                 }
 232
 233 gateway         return GATEWAY;
 234
 235 less            return LESS;
 236 greater         return GREATER;
 237 byte            return BYTE;
 238 broadcast       return TK_BROADCAST;
 239 multicast       return TK_MULTICAST;
 240
 241 and|"&&"        return AND;
 242 or|"||"         return OR;
 243 not             return '!';
 244
 245 len|length      return LEN;
 246 inbound         return INBOUND;
 247 outbound        return OUTBOUND;
 248
 249 vlan            return VLAN;
 250
 251 [ \n\t]                 ;
 252 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 253 ">="                    return GEQ;
 254 "<="                    return LEQ;
 255 "!="                    return NEQ;
 256 "=="                    return '=';
 257 "<<"                    return LSH;
 258 ">>"                    return RSH;
 259 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 260                           return AID; }
 261 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 262 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 263                         yylval.s = sdup((char *)yytext); return HID; }
 264 {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
 265                           return EID; }
 266 {V6}                    {
 267 #ifdef INET6
 268                           struct addrinfo hints, *res;
 269                           memset(&hints, 0, sizeof(hints));
 270                           hints.ai_family = AF_INET6;
 271                           hints.ai_flags = AI_NUMERICHOST;
 272                           if (getaddrinfo(yytext, NULL, &hints, &res))
 273                                 bpf_error("bogus IPv6 address %s", yytext);
 274                           else {
 275                                 yylval.e = sdup((char *)yytext); return HID6;
 276                           }
 277 #else
 278                           bpf_error("IPv6 address %s not supported", yytext);
 279 #endif /*INET6*/
 280                         }
 281 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 282 icmptype                { yylval.i = 0; return NUM; }
 283 icmpcode                { yylval.i = 1; return NUM; }
 284 icmp-echoreply          { yylval.i = 0; return NUM; }
 285 icmp-unreach            { yylval.i = 3; return NUM; }
 286 icmp-sourcequench       { yylval.i = 4; return NUM; }
 287 icmp-redirect           { yylval.i = 5; return NUM; }
 288 icmp-echo               { yylval.i = 8; return NUM; }
 289 icmp-routeradvert       { yylval.i = 9; return NUM; }
 290 icmp-routersolicit      { yylval.i = 10; return NUM; }
 291 icmp-timxceed           { yylval.i = 11; return NUM; }
 292 icmp-paramprob          { yylval.i = 12; return NUM; }
 293 icmp-tstamp             { yylval.i = 13; return NUM; }
 294 icmp-tstampreply        { yylval.i = 14; return NUM; }
 295 icmp-ireq               { yylval.i = 15; return NUM; }
 296 icmp-ireqreply          { yylval.i = 16; return NUM; }
 297 icmp-maskreq            { yylval.i = 17; return NUM; }
 298 icmp-maskreply          { yylval.i = 18; return NUM; }
 299 tcpflags                { yylval.i = 13; return NUM; }
 300 tcp-fin                 { yylval.i = 0x01; return NUM; }
 301 tcp-syn                 { yylval.i = 0x02; return NUM; }
 302 tcp-rst                 { yylval.i = 0x04; return NUM; }
 303 tcp-push                { yylval.i = 0x08; return NUM; }
 304 tcp-ack                 { yylval.i = 0x10; return NUM; }
 305 tcp-urg                 { yylval.i = 0x20; return NUM; }
 306 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
 307                          yylval.s = sdup((char *)yytext); return ID; }
 308 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 309 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
 310                         bpf_error("illegal token: %s", yytext); }
 311 .                       { bpf_error("illegal char '%c'", *yytext); }
 312 %%
 313 void
 314 lex_init(buf)
 315         char *buf;
 316 {
 317 #ifdef FLEX_SCANNER
 318         in_buffer = yy_scan_string(buf);
 319 #else
 320         in_buffer = buf;
 321 #endif
 322 }
 323
 324 /*
 325  * Do any cleanup necessary after parsing.
 326  */
 327 void
 328 lex_cleanup()
 329 {
 330 #ifdef FLEX_SCANNER
 331         if (in_buffer != NULL)
 332                 yy_delete_buffer(in_buffer);
 333         in_buffer = NULL;
 334 #endif
 335 }
 336
 337 /*
 338  * Also define a yywrap.  Note that if we're using flex, it will
 339  * define a macro to map this identifier to pcap_wrap.
 340  */
 341 int
 342 yywrap()
 343 {
 344         return 1;
 345 }
 346
 347 /* Hex digit to integer. */
 348 static inline int
 349 xdtoi(c)
 350         register int c;
 351 {
 352         if (isdigit(c))
 353                 return c - '0';
 354         else if (islower(c))
 355                 return c - 'a' + 10;
 356         else
 357                 return c - 'A' + 10;
 358 }
 359
 360 /*
 361  * Convert string to integer.  Just like atoi(), but checks for
 362  * preceding 0x or 0 and uses hex or octal instead of decimal.
 363  */
 364 static int
 365 stoi(s)
 366         char *s;
 367 {
 368         int base = 10;
 369         int n = 0;
 370
 371         if (*s == '0') {
 372                 if (s[1] == 'x' || s[1] == 'X') {
 373                         s += 2;
 374                         base = 16;
 375                 }
 376                 else {
 377                         base = 8;
 378                         s += 1;
 379                 }
 380         }
 381         while (*s)
 382                 n = n * base + xdtoi(*s++);
 383
 384         return n;
 385 }