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 1.77 2001-05-10 14:48:03 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             return IPV6;
 183 icmp6           return ICMPV6;
 184 ah              return AH;
 185 esp             return ESP;
 186
 187 atalk           return ATALK;
 188 aarp            return AARP;
 189 decnet          return DECNET;
 190 lat             return LAT;
 191 sca             return SCA;
 192 moprc           return MOPRC;
 193 mopdl           return MOPDL;
 194
 195 iso             return ISO;
 196 esis            return ESIS;
 197 es-is           return ESIS;
 198 isis            return ISIS;
 199 is-is           return ISIS;
 200 clnp            return CLNP;
 201
 202 stp             return STP;
 203
 204 ipx             return IPX;
 205
 206 netbeui         return NETBEUI;
 207
 208 host            return HOST;
 209 net             return NET;
 210 mask            return MASK;
 211 port            return PORT;
 212 proto           return PROTO;
 213 protochain      {
 214 #ifdef NO_PROTOCHAIN
 215                   bpf_error("%s not supported", yytext);
 216 #else
 217                   return PROTOCHAIN;
 218 #endif
 219                 }
 220
 221 gateway         return GATEWAY;
 222
 223 less            return LESS;
 224 greater         return GREATER;
 225 byte            return BYTE;
 226 broadcast       return TK_BROADCAST;
 227 multicast       return TK_MULTICAST;
 228
 229 and|"&&"        return AND;
 230 or|"||"         return OR;
 231 not             return '!';
 232
 233 len|length      return LEN;
 234 inbound         return INBOUND;
 235 outbound        return OUTBOUND;
 236
 237 vlan            return VLAN;
 238
 239 [ \n\t]                 ;
 240 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 241 ">="                    return GEQ;
 242 "<="                    return LEQ;
 243 "!="                    return NEQ;
 244 "=="                    return '=';
 245 "<<"                    return LSH;
 246 ">>"                    return RSH;
 247 ${B}                    { yylval.e = pcap_ether_aton(((char *)yytext)+1);
 248                           return AID; }
 249 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 250 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 251                         yylval.s = sdup((char *)yytext); return HID; }
 252 {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
 253                           return EID; }
 254 {V6}                    {
 255 #ifdef INET6
 256                           struct addrinfo hints, *res;
 257                           memset(&hints, 0, sizeof(hints));
 258                           hints.ai_family = AF_INET6;
 259                           hints.ai_flags = AI_NUMERICHOST;
 260                           if (getaddrinfo(yytext, NULL, &hints, &res))
 261                                 bpf_error("bogus IPv6 address %s", yytext);
 262                           else {
 263                                 yylval.e = sdup((char *)yytext); return HID6;
 264                           }
 265 #else
 266                           bpf_error("IPv6 address %s not supported", yytext);
 267 #endif /*INET6*/
 268                         }
 269 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 270 icmptype                { yylval.i = 0; return NUM; }
 271 icmpcode                { yylval.i = 1; return NUM; }
 272 icmp-echoreply          { yylval.i = 0; return NUM; }
 273 icmp-unreach            { yylval.i = 3; return NUM; }
 274 icmp-sourcequench       { yylval.i = 4; return NUM; }
 275 icmp-redirect           { yylval.i = 5; return NUM; }
 276 icmp-echo               { yylval.i = 8; return NUM; }
 277 icmp-routeradvert       { yylval.i = 9; return NUM; }
 278 icmp-routersolicit      { yylval.i = 10; return NUM; }
 279 icmp-timxceed           { yylval.i = 11; return NUM; }
 280 icmp-paramprob          { yylval.i = 12; return NUM; }
 281 icmp-tstamp             { yylval.i = 13; return NUM; }
 282 icmp-tstampreply        { yylval.i = 14; return NUM; }
 283 icmp-ireq               { yylval.i = 15; return NUM; }
 284 icmp-ireqreply          { yylval.i = 16; return NUM; }
 285 icmp-maskreq            { yylval.i = 17; return NUM; }
 286 icmp-maskreply          { yylval.i = 18; return NUM; }
 287 tcpflags                { yylval.i = 13; return NUM; }
 288 tcp-fin                 { yylval.i = 0x01; return NUM; }
 289 tcp-syn                 { yylval.i = 0x02; return NUM; }
 290 tcp-rst                 { yylval.i = 0x04; return NUM; }
 291 tcp-push                { yylval.i = 0x08; return NUM; }
 292 tcp-ack                 { yylval.i = 0x10; return NUM; }
 293 tcp-urg                 { yylval.i = 0x20; return NUM; }
 294 [A-Za-z0-9][-_.A-Za-z0-9]*[.A-Za-z0-9] {
 295                          yylval.s = sdup((char *)yytext); return ID; }
 296 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 297 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+i {
 298                         bpf_error("illegal token: %s\n", yytext); }
 299 .                       { bpf_error("illegal char '%c'", *yytext); }
 300 %%
 301 void
 302 lex_init(buf)
 303         char *buf;
 304 {
 305 #ifdef FLEX_SCANNER
 306         in_buffer = yy_scan_string(buf);
 307 #else
 308         in_buffer = buf;
 309 #endif
 310 }
 311
 312 /*
 313  * Do any cleanup necessary after parsing.
 314  */
 315 void
 316 lex_cleanup()
 317 {
 318 #ifdef FLEX_SCANNER
 319         if (in_buffer != NULL)
 320                 yy_delete_buffer(in_buffer);
 321         in_buffer = NULL;
 322 #endif
 323 }
 324
 325 /*
 326  * Also define a yywrap.  Note that if we're using flex, it will
 327  * define a macro to map this identifier to pcap_wrap.
 328  */
 329 int
 330 yywrap()
 331 {
 332         return 1;
 333 }
 334
 335 /* Hex digit to integer. */
 336 static inline int
 337 xdtoi(c)
 338         register int c;
 339 {
 340         if (isdigit(c))
 341                 return c - '0';
 342         else if (islower(c))
 343                 return c - 'a' + 10;
 344         else
 345                 return c - 'A' + 10;
 346 }
 347
 348 /*
 349  * Convert string to integer.  Just like atoi(), but checks for
 350  * preceding 0x or 0 and uses hex or octal instead of decimal.
 351  */
 352 static int
 353 stoi(s)
 354         char *s;
 355 {
 356         int base = 10;
 357         int n = 0;
 358
 359         if (*s == '0') {
 360                 if (s[1] == 'x' || s[1] == 'X') {
 361                         s += 2;
 362                         base = 16;
 363                 }
 364                 else {
 365                         base = 8;
 366                         s += 1;
 367                 }
 368         }
 369         while (*s)
 370                 n = n * base + xdtoi(*s++);
 371
 372         return n;
 373 }