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 1.112 2008-02-06 10:21:30 guy Exp $ (LBL)"; 26 #endif 27 28 #ifdef HAVE_CONFIG_H 29 #include "config.h" 30 #endif 31 32 #ifdef WIN32 33 #include <pcap-stdinc.h> 34 #else /* WIN32 */ 35 #if HAVE_INTTYPES_H 36 #include <inttypes.h> 37 #elif HAVE_STDINT_H 38 #include <stdint.h> 39 #endif 40 #ifdef HAVE_SYS_BITYPES_H 41 #include <sys/bitypes.h> 42 #endif 43 #include <sys/types.h> 44 #endif /* WIN32 */ 45 46 #include <ctype.h> 47 #include <string.h> 48 49 #include "pcap-int.h" 50 51 #include "gencode.h" 52 #ifdef INET6 53 #ifdef WIN32 54 #include <pcap-stdinc.h> 55 56 #ifdef __MINGW32__ 57 #include "ip6_misc.h" 58 #endif 59 #else /* WIN32 */ 60 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */ 61 #include <netdb.h> /* for "struct addrinfo" */ 62 #endif /* WIN32 */ 63 64 /* Workaround for AIX 4.3 */ 65 #if !defined(AI_NUMERICHOST) 66 #define AI_NUMERICHOST 0x04 67 #endif 68 #endif /*INET6*/ 69 #include <pcap/namedb.h> 70 #include "tokdefs.h" 71 72 #ifdef HAVE_OS_PROTO_H 73 #include "os-proto.h" 74 #endif 75 76 static int stoi(char *); 77 static inline int xdtoi(int); 78 79 #ifdef FLEX_SCANNER 80 #define YY_NO_INPUT 81 #define YY_NO_UNPUT 82 static YY_BUFFER_STATE in_buffer; 83 #else 84 static const char *in_buffer; 85 86 #undef getc 87 #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++) 88 #endif 89 90 #define yylval pcap_lval 91 extern YYSTYPE yylval; 92 93 %} 94 95 N ([0-9]+|(0X|0x)[0-9A-Fa-f]+) 96 B ([0-9A-Fa-f][0-9A-Fa-f]?) 97 B2 ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]) 98 W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?) 99 100 %a 18400 101 %o 21500 102 %e 7600 103 %k 4550 104 %p 27600 105 %n 2000 106 107 V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} 108 109 V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} 110 V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} 111 V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} 112 V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} 113 V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} 114 V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} 115 V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} 116 V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: 117 118 V660 ::{W}:{W}:{W}:{W}:{W}:{W} 119 V661 {W}::{W}:{W}:{W}:{W}:{W} 120 V662 {W}:{W}::{W}:{W}:{W}:{W} 121 V663 {W}:{W}:{W}::{W}:{W}:{W} 122 V664 {W}:{W}:{W}:{W}::{W}:{W} 123 V665 {W}:{W}:{W}:{W}:{W}::{W} 124 V666 {W}:{W}:{W}:{W}:{W}:{W}:: 125 126 V650 ::{W}:{W}:{W}:{W}:{W} 127 V651 {W}::{W}:{W}:{W}:{W} 128 V652 {W}:{W}::{W}:{W}:{W} 129 V653 {W}:{W}:{W}::{W}:{W} 130 V654 {W}:{W}:{W}:{W}::{W} 131 V655 {W}:{W}:{W}:{W}:{W}:: 132 133 V640 ::{W}:{W}:{W}:{W} 134 V641 {W}::{W}:{W}:{W} 135 V642 {W}:{W}::{W}:{W} 136 V643 {W}:{W}:{W}::{W} 137 V644 {W}:{W}:{W}:{W}:: 138 139 V630 ::{W}:{W}:{W} 140 V631 {W}::{W}:{W} 141 V632 {W}:{W}::{W} 142 V633 {W}:{W}:{W}:: 143 144 V620 ::{W}:{W} 145 V621 {W}::{W} 146 V622 {W}:{W}:: 147 148 V610 ::{W} 149 V611 {W}:: 150 151 V600 :: 152 153 V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 154 155 V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 156 V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 157 V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 158 V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 159 V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 160 V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 161 162 V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 163 V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 164 V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 165 V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 166 V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 167 168 V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 169 V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 170 V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 171 V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 172 173 V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} 174 V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} 175 V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} 176 177 V6104 ::{W}:{N}\.{N}\.{N}\.{N} 178 V6114 {W}::{N}\.{N}\.{N}\.{N} 179 180 V6004 ::{N}\.{N}\.{N}\.{N} 181 182 183 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}) 184 185 MAC ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3}) 186 187 188 189 %% 190 dst return DST; 191 src return SRC; 192 193 link|ether|ppp|slip return LINK; 194 fddi|tr|wlan return LINK; 195 arp return ARP; 196 rarp return RARP; 197 ip return IP; 198 sctp return SCTP; 199 tcp return TCP; 200 udp return UDP; 201 icmp return ICMP; 202 igmp return IGMP; 203 igrp return IGRP; 204 pim return PIM; 205 vrrp return VRRP; 206 carp return CARP; 207 radio return RADIO; 208 209 ip6 return IPV6; 210 icmp6 return ICMPV6; 211 ah return AH; 212 esp return ESP; 213 214 atalk return ATALK; 215 aarp return AARP; 216 decnet return DECNET; 217 lat return LAT; 218 sca return SCA; 219 moprc return MOPRC; 220 mopdl return MOPDL; 221 222 iso return ISO; 223 esis return ESIS; 224 es-is return ESIS; 225 isis return ISIS; 226 is-is return ISIS; 227 l1 return L1; 228 l2 return L2; 229 iih return IIH; 230 lsp return LSP; 231 snp return SNP; 232 csnp return CSNP; 233 psnp return PSNP; 234 235 clnp return CLNP; 236 237 stp return STP; 238 239 ipx return IPX; 240 241 netbeui return NETBEUI; 242 243 host return HOST; 244 net return NET; 245 mask return NETMASK; 246 port return PORT; 247 portrange return PORTRANGE; 248 proto return PROTO; 249 protochain { 250 #ifdef NO_PROTOCHAIN 251 bpf_error("%s not supported", yytext); 252 #else 253 return PROTOCHAIN; 254 #endif 255 } 256 257 gateway return GATEWAY; 258 259 type return TYPE; 260 subtype return SUBTYPE; 261 direction|dir return DIR; 262 address1|addr1 return ADDR1; 263 address2|addr2 return ADDR2; 264 address3|addr3 return ADDR3; 265 address4|addr4 return ADDR4; 266 ra return RA; 267 ta return TA; 268 269 less return LESS; 270 greater return GREATER; 271 byte return CBYTE; 272 broadcast return TK_BROADCAST; 273 multicast return TK_MULTICAST; 274 275 and|"&&" return AND; 276 or|"||" return OR; 277 not return '!'; 278 279 len|length return LEN; 280 inbound return INBOUND; 281 outbound return OUTBOUND; 282 283 vlan return VLAN; 284 mpls return MPLS; 285 pppoed return PPPOED; 286 pppoes return PPPOES; 287 288 lane return LANE; 289 llc return LLC; 290 metac return METAC; 291 bcc return BCC; 292 oam return OAM; 293 oamf4 return OAMF4; 294 oamf4ec return OAMF4EC; 295 oamf4sc return OAMF4SC; 296 sc return SC; 297 ilmic return ILMIC; 298 vpi return VPI; 299 vci return VCI; 300 connectmsg return CONNECTMSG; 301 metaconnect return METACONNECT; 302 303 on|ifname return PF_IFNAME; 304 rset|ruleset return PF_RSET; 305 rnr|rulenum return PF_RNR; 306 srnr|subrulenum return PF_SRNR; 307 reason return PF_REASON; 308 action return PF_ACTION; 309 310 fisu return FISU; 311 lssu return LSSU; 312 lsu return LSSU; 313 msu return MSU; 314 hfisu return HFISU; 315 hlssu return HLSSU; 316 hmsu return HMSU; 317 sio return SIO; 318 opc return OPC; 319 dpc return DPC; 320 sls return SLS; 321 hsio return HSIO; 322 hopc return HOPC; 323 hdpc return HDPC; 324 hsls return HSLS; 325 326 [ \r\n\t] ; 327 [+\-*/:\[\]!<>()&|=] return yytext[0]; 328 ">=" return GEQ; 329 "<=" return LEQ; 330 "!=" return NEQ; 331 "==" return '='; 332 "<<" return LSH; 333 ">>" return RSH; 334 ${B} { yylval.e = pcap_ether_aton(((char *)yytext)+1); 335 if (yylval.e == NULL) 336 bpf_error("malloc"); 337 return AID; } 338 {MAC} { yylval.e = pcap_ether_aton((char *)yytext); 339 if (yylval.e == NULL) 340 bpf_error("malloc"); 341 return EID; } 342 {N} { yylval.i = stoi((char *)yytext); return NUM; } 343 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) { 344 yylval.s = sdup((char *)yytext); return HID; } 345 {V6} { 346 #ifdef INET6 347 struct addrinfo hints, *res; 348 memset(&hints, 0, sizeof(hints)); 349 hints.ai_family = AF_INET6; 350 hints.ai_flags = AI_NUMERICHOST; 351 if (getaddrinfo(yytext, NULL, &hints, &res)) 352 bpf_error("bogus IPv6 address %s", yytext); 353 else { 354 freeaddrinfo(res); 355 yylval.s = sdup((char *)yytext); return HID6; 356 } 357 #else 358 bpf_error("IPv6 address %s not supported", yytext); 359 #endif /*INET6*/ 360 } 361 {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); } 362 icmptype { yylval.i = 0; return NUM; } 363 icmpcode { yylval.i = 1; return NUM; } 364 icmp-echoreply { yylval.i = 0; return NUM; } 365 icmp-unreach { yylval.i = 3; return NUM; } 366 icmp-sourcequench { yylval.i = 4; return NUM; } 367 icmp-redirect { yylval.i = 5; return NUM; } 368 icmp-echo { yylval.i = 8; return NUM; } 369 icmp-routeradvert { yylval.i = 9; return NUM; } 370 icmp-routersolicit { yylval.i = 10; return NUM; } 371 icmp-timxceed { yylval.i = 11; return NUM; } 372 icmp-paramprob { yylval.i = 12; return NUM; } 373 icmp-tstamp { yylval.i = 13; return NUM; } 374 icmp-tstampreply { yylval.i = 14; return NUM; } 375 icmp-ireq { yylval.i = 15; return NUM; } 376 icmp-ireqreply { yylval.i = 16; return NUM; } 377 icmp-maskreq { yylval.i = 17; return NUM; } 378 icmp-maskreply { yylval.i = 18; return NUM; } 379 tcpflags { yylval.i = 13; return NUM; } 380 tcp-fin { yylval.i = 0x01; return NUM; } 381 tcp-syn { yylval.i = 0x02; return NUM; } 382 tcp-rst { yylval.i = 0x04; return NUM; } 383 tcp-push { yylval.i = 0x08; return NUM; } 384 tcp-ack { yylval.i = 0x10; return NUM; } 385 tcp-urg { yylval.i = 0x20; return NUM; } 386 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? { 387 yylval.s = sdup((char *)yytext); return ID; } 388 "\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; } 389 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { 390 bpf_error("illegal token: %s", yytext); } 391 . { bpf_error("illegal char '%c'", *yytext); } 392 %% 393 void 394 lex_init(buf) 395 const char *buf; 396 { 397 #ifdef FLEX_SCANNER 398 in_buffer = yy_scan_string(buf); 399 #else 400 in_buffer = buf; 401 #endif 402 } 403 404 /* 405 * Do any cleanup necessary after parsing. 406 */ 407 void 408 lex_cleanup() 409 { 410 #ifdef FLEX_SCANNER 411 if (in_buffer != NULL) 412 yy_delete_buffer(in_buffer); 413 in_buffer = NULL; 414 #endif 415 } 416 417 /* 418 * Also define a yywrap. Note that if we're using flex, it will 419 * define a macro to map this identifier to pcap_wrap. 420 */ 421 int 422 yywrap() 423 { 424 return 1; 425 } 426 427 /* Hex digit to integer. */ 428 static inline int 429 xdtoi(c) 430 register int c; 431 { 432 if (isdigit(c)) 433 return c - '0'; 434 else if (islower(c)) 435 return c - 'a' + 10; 436 else 437 return c - 'A' + 10; 438 } 439 440 /* 441 * Convert string to integer. Just like atoi(), but checks for 442 * preceding 0x or 0 and uses hex or octal instead of decimal. 443 */ 444 static int 445 stoi(s) 446 char *s; 447 { 448 int base = 10; 449 int n = 0; 450 451 if (*s == '0') { 452 if (s[1] == 'x' || s[1] == 'X') { 453 s += 2; 454 base = 16; 455 } 456 else { 457 base = 8; 458 s += 1; 459 } 460 } 461 while (*s) 462 n = n * base + xdtoi(*s++); 463 464 return n; 465 } 466
