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 1.63 2000-06-10 14:42:27 assar Exp $ (LBL)";
  26 #endif
  27
  28 #include <sys/types.h>
  29 #include <sys/time.h>
  30
  31 #include <ctype.h>
  32 #include <unistd.h>
  33 #include <string.h>
  34
  35 #include "pcap-int.h"
  36
  37 #include "gencode.h"
  38 #include <pcap-namedb.h>
  39 #ifdef INET6
  40 #include <netdb.h>
  41 #include <sys/socket.h>
  42 /* Workaround for AIX 4.3 */
  43 #if !defined(AI_NUMERICHOST)
  44 #define AI_NUMERICHOST 0x04
  45 #endif
  46 #endif /*INET6*/
  47 #include "tokdefs.h"
  48
  49 #include "gnuc.h"
  50 #ifdef HAVE_OS_PROTO_H
  51 #include "os-proto.h"
  52 #endif
  53
  54 static int stoi(char *);
  55 static inline int xdtoi(int);
  56
  57 #ifdef FLEX_SCANNER
  58 #define YY_NO_UNPUT
  59 #undef YY_INPUT
  60 #define YY_INPUT(buf, result, max)\
  61  {\
  62         char *src = in_buffer;\
  63         int i;\
  64 \
  65         if (*src == 0)\
  66                 result = YY_NULL;\
  67         else {\
  68                 for (i = 0; *src && i < max; ++i)\
  69                         buf[i] = *src++;\
  70                 in_buffer += i;\
  71                 result = i;\
  72         }\
  73  }
  74 #else
  75 #undef getc
  76 #define getc(fp)  (*in_buffer == 0 ? EOF : *in_buffer++)
  77 #endif
  78
  79 #define yylval pcap_lval
  80 extern YYSTYPE yylval;
  81
  82 static char *in_buffer;
  83
  84 %}
  85
  86 N               ([0-9]+|(0X|0x)[0-9A-Fa-f]+)
  87 B               ([0-9A-Fa-f][0-9A-Fa-f]?)
  88 W               ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?)
  89
  90 %a 15000
  91 %o 17000
  92 %e 6000
  93 %k 4000
  94 %p 19000
  95 %n 2000
  96
  97 V680            {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W}
  98
  99 V670            ::{W}:{W}:{W}:{W}:{W}:{W}:{W}
 100 V671            {W}::{W}:{W}:{W}:{W}:{W}:{W}
 101 V672            {W}:{W}::{W}:{W}:{W}:{W}:{W}
 102 V673            {W}:{W}:{W}::{W}:{W}:{W}:{W}
 103 V674            {W}:{W}:{W}:{W}::{W}:{W}:{W}
 104 V675            {W}:{W}:{W}:{W}:{W}::{W}:{W}
 105 V676            {W}:{W}:{W}:{W}:{W}:{W}::{W}
 106 V677            {W}:{W}:{W}:{W}:{W}:{W}:{W}::
 107
 108 V660            ::{W}:{W}:{W}:{W}:{W}:{W}
 109 V661            {W}::{W}:{W}:{W}:{W}:{W}
 110 V662            {W}:{W}::{W}:{W}:{W}:{W}
 111 V663            {W}:{W}:{W}::{W}:{W}:{W}
 112 V664            {W}:{W}:{W}:{W}::{W}:{W}
 113 V665            {W}:{W}:{W}:{W}:{W}::{W}
 114 V666            {W}:{W}:{W}:{W}:{W}:{W}::
 115
 116 V650            ::{W}:{W}:{W}:{W}:{W}
 117 V651            {W}::{W}:{W}:{W}:{W}
 118 V652            {W}:{W}::{W}:{W}:{W}
 119 V653            {W}:{W}:{W}::{W}:{W}
 120 V654            {W}:{W}:{W}:{W}::{W}
 121 V655            {W}:{W}:{W}:{W}:{W}::
 122
 123 V640            ::{W}:{W}:{W}:{W}
 124 V641            {W}::{W}:{W}:{W}
 125 V642            {W}:{W}::{W}:{W}
 126 V643            {W}:{W}:{W}::{W}
 127 V644            {W}:{W}:{W}:{W}::
 128
 129 V630            ::{W}:{W}:{W}
 130 V631            {W}::{W}:{W}
 131 V632            {W}:{W}::{W}
 132 V633            {W}:{W}:{W}::
 133
 134 V620            ::{W}:{W}
 135 V621            {W}::{W}
 136 V622            {W}:{W}::
 137
 138 V610            ::{W}
 139 V611            {W}::
 140
 141 V600            ::
 142
 143 V6604           {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 144
 145 V6504           ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 146 V6514           {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 147 V6524           {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 148 V6534           {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 149 V6544           {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 150 V6554           {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 151
 152 V6404           ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 153 V6414           {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 154 V6424           {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 155 V6434           {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 156 V6444           {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 157
 158 V6304           ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N}
 159 V6314           {W}::{W}:{W}:{N}\.{N}\.{N}\.{N}
 160 V6324           {W}:{W}::{W}:{N}\.{N}\.{N}\.{N}
 161 V6334           {W}:{W}:{W}::{N}\.{N}\.{N}\.{N}
 162
 163 V6204           ::{W}:{W}:{N}\.{N}\.{N}\.{N}
 164 V6214           {W}::{W}:{N}\.{N}\.{N}\.{N}
 165 V6224           {W}:{W}::{N}\.{N}\.{N}\.{N}
 166
 167 V6104           ::{W}:{N}\.{N}\.{N}\.{N}
 168 V6114           {W}::{N}\.{N}\.{N}\.{N}
 169
 170 V6004           ::{N}\.{N}\.{N}\.{N}
 171
 172
 173 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})
 174
 175 %%
 176 dst             return DST;
 177 src             return SRC;
 178
 179 link|ether|ppp|slip  return LINK;
 180 fddi            return LINK;
 181 arp             return ARP;
 182 rarp            return RARP;
 183 ip              return IP;
 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
 191 ip6             return IPV6;
 192 icmp6           return ICMPV6;
 193 ah              return AH;
 194 esp             return ESP;
 195
 196 atalk           return ATALK;
 197 decnet          return DECNET;
 198 lat             return LAT;
 199 sca             return SCA;
 200 moprc           return MOPRC;
 201 mopdl           return MOPDL;
 202
 203 host            return HOST;
 204 net             return NET;
 205 mask            return MASK;
 206 port            return PORT;
 207 proto           return PROTO;
 208 protochain      {
 209 #ifdef NO_PROTOCHAIN
 210                   bpf_error("%s not supported", yytext);
 211 #else
 212                   return PROTOCHAIN;
 213 #endif
 214                 }
 215
 216 gateway         return GATEWAY;
 217
 218 less            return LESS;
 219 greater         return GREATER;
 220 byte            return BYTE;
 221 broadcast       return TK_BROADCAST;
 222 multicast       return TK_MULTICAST;
 223
 224 and|"&&"        return AND;
 225 or|"||"         return OR;
 226 not             return '!';
 227
 228 len|length      return LEN;
 229 inbound         return INBOUND;
 230 outbound        return OUTBOUND;
 231
 232 [ \n\t]                 ;
 233 [+\-*/:\[\]!<>()&|=]    return yytext[0];
 234 ">="                    return GEQ;
 235 "<="                    return LEQ;
 236 "!="                    return NEQ;
 237 "=="                    return '=';
 238 "<<"                    return LSH;
 239 ">>"                    return RSH;
 240 {N}                     { yylval.i = stoi((char *)yytext); return NUM; }
 241 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) {
 242                         yylval.s = sdup((char *)yytext); return HID; }
 243 {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext);
 244                           return EID; }
 245 {V6}                    {
 246 #ifdef INET6
 247                           struct addrinfo hints, *res;
 248                           memset(&hints, 0, sizeof(hints));
 249                           hints.ai_family = AF_INET6;
 250                           hints.ai_flags = AI_NUMERICHOST;
 251                           if (getaddrinfo(yytext, NULL, &hints, &res))
 252                                 bpf_error("bogus IPv6 address %s", yytext);
 253                           else {
 254                                 yylval.e = sdup((char *)yytext); return HID6;
 255                           }
 256 #else
 257                           bpf_error("IPv6 address %s not supported", yytext);
 258 #endif /*INET6*/
 259                         }
 260 {B}:+({B}:+)+           { bpf_error("bogus ethernet address %s", yytext); }
 261 [A-Za-z0-9][-_.A-Za-z0-9]*[.A-Za-z0-9] {
 262                          yylval.s = sdup((char *)yytext); return ID; }
 263 "\\"[^ !()\n\t]+        { yylval.s = sdup((char *)yytext + 1); return ID; }
 264 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+i {
 265                         bpf_error("illegal token: %s\n", yytext); }
 266 .                       { bpf_error("illegal char '%c'", *yytext); }
 267 %%
 268 void
 269 lex_init(buf)
 270         char *buf;
 271 {
 272         in_buffer = buf;
 273 #ifdef FLEX_SCANNER
 274         /*
 275          * Flush the scanner's input buffer, so that there's no cruft
 276          * left over from a previous parse.
 277          */
 278         YY_FLUSH_BUFFER;
 279 #endif
 280 }
 281
 282 /*
 283  * Also define a yywrap.  Note that if we're using flex, it will
 284  * define a macro to map this identifier to pcap_wrap.
 285  */
 286 int
 287 yywrap()
 288 {
 289         return 1;
 290 }
 291
 292 /* Hex digit to integer. */
 293 static inline int
 294 xdtoi(c)
 295         register int c;
 296 {
 297         if (isdigit(c))
 298                 return c - '0';
 299         else if (islower(c))
 300                 return c - 'a' + 10;
 301         else
 302                 return c - 'A' + 10;
 303 }
 304
 305 /*
 306  * Convert string to integer.  Just like atoi(), but checks for
 307  * preceding 0x or 0 and uses hex or octal instead of decimal.
 308  */
 309 static int
 310 stoi(s)
 311         char *s;
 312 {
 313         int base = 10;
 314         int n = 0;
 315
 316         if (*s == '0') {
 317                 if (s[1] == 'x' || s[1] == 'X') {
 318                         s += 2;
 319                         base = 16;
 320                 }
 321                 else {
 322                         base = 8;
 323                         s += 1;
 324                 }
 325         }
 326         while (*s)
 327                 n = n * base + xdtoi(*s++);
 328
 329         return n;
 330 }
 331