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 static YY_BUFFER_STATE in_buffer; 81 #else 82 static const char *in_buffer; 83 84 #undef getc 85 #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++) 86 #endif 87 88 #define yylval pcap_lval 89 extern YYSTYPE yylval; 90 91 %} 92 93 N ([0-9]+|(0X|0x)[0-9A-Fa-f]+) 94 B ([0-9A-Fa-f][0-9A-Fa-f]?) 95 B2 ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]) 96 W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?) 97 98 %a 18400 99 %o 21500 100 %e 7600 101 %k 4550 102 %p 27600 103 %n 2000 104 105 V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} 106 107 V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} 108 V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} 109 V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} 110 V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} 111 V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} 112 V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} 113 V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} 114 V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: 115 116 V660 ::{W}:{W}:{W}:{W}:{W}:{W} 117 V661 {W}::{W}:{W}:{W}:{W}:{W} 118 V662 {W}:{W}::{W}:{W}:{W}:{W} 119 V663 {W}:{W}:{W}::{W}:{W}:{W} 120 V664 {W}:{W}:{W}:{W}::{W}:{W} 121 V665 {W}:{W}:{W}:{W}:{W}::{W} 122 V666 {W}:{W}:{W}:{W}:{W}:{W}:: 123 124 V650 ::{W}:{W}:{W}:{W}:{W} 125 V651 {W}::{W}:{W}:{W}:{W} 126 V652 {W}:{W}::{W}:{W}:{W} 127 V653 {W}:{W}:{W}::{W}:{W} 128 V654 {W}:{W}:{W}:{W}::{W} 129 V655 {W}:{W}:{W}:{W}:{W}:: 130 131 V640 ::{W}:{W}:{W}:{W} 132 V641 {W}::{W}:{W}:{W} 133 V642 {W}:{W}::{W}:{W} 134 V643 {W}:{W}:{W}::{W} 135 V644 {W}:{W}:{W}:{W}:: 136 137 V630 ::{W}:{W}:{W} 138 V631 {W}::{W}:{W} 139 V632 {W}:{W}::{W} 140 V633 {W}:{W}:{W}:: 141 142 V620 ::{W}:{W} 143 V621 {W}::{W} 144 V622 {W}:{W}:: 145 146 V610 ::{W} 147 V611 {W}:: 148 149 V600 :: 150 151 V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 152 153 V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 154 V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 155 V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 156 V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 157 V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 158 V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 159 160 V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 161 V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 162 V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 163 V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 164 V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 165 166 V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 167 V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 168 V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 169 V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 170 171 V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} 172 V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} 173 V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} 174 175 V6104 ::{W}:{N}\.{N}\.{N}\.{N} 176 V6114 {W}::{N}\.{N}\.{N}\.{N} 177 178 V6004 ::{N}\.{N}\.{N}\.{N} 179 180 181 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}) 182 183 MAC ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3}) 184 185 186 %option nounput 187 %option noinput 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 { 210 #ifdef INET6 211 return IPV6; 212 #else 213 bpf_error("%s not supported", yytext); 214 #endif 215 } 216 icmp6 { 217 #ifdef INET6 218 return ICMPV6; 219 #else 220 bpf_error("%s not supported", yytext); 221 #endif 222 } 223 ah return AH; 224 esp return ESP; 225 226 atalk return ATALK; 227 aarp return AARP; 228 decnet return DECNET; 229 lat return LAT; 230 sca return SCA; 231 moprc return MOPRC; 232 mopdl return MOPDL; 233 234 iso return ISO; 235 esis return ESIS; 236 es-is return ESIS; 237 isis return ISIS; 238 is-is return ISIS; 239 l1 return L1; 240 l2 return L2; 241 iih return IIH; 242 lsp return LSP; 243 snp return SNP; 244 csnp return CSNP; 245 psnp return PSNP; 246 247 clnp return CLNP; 248 249 stp return STP; 250 251 ipx return IPX; 252 253 netbeui return NETBEUI; 254 255 host return HOST; 256 net return NET; 257 mask return NETMASK; 258 port return PORT; 259 portrange return PORTRANGE; 260 proto return PROTO; 261 protochain { 262 #ifdef NO_PROTOCHAIN 263 bpf_error("%s not supported", yytext); 264 #else 265 return PROTOCHAIN; 266 #endif 267 } 268 269 gateway return GATEWAY; 270 271 type return TYPE; 272 subtype return SUBTYPE; 273 direction|dir return DIR; 274 address1|addr1 return ADDR1; 275 address2|addr2 return ADDR2; 276 address3|addr3 return ADDR3; 277 address4|addr4 return ADDR4; 278 ra return RA; 279 ta return TA; 280 281 less return LESS; 282 greater return GREATER; 283 byte return CBYTE; 284 broadcast return TK_BROADCAST; 285 multicast return TK_MULTICAST; 286 287 and|"&&" return AND; 288 or|"||" return OR; 289 not return '!'; 290 291 len|length return LEN; 292 inbound return INBOUND; 293 outbound return OUTBOUND; 294 295 vlan return VLAN; 296 mpls return MPLS; 297 pppoed return PPPOED; 298 pppoes return PPPOES; 299 300 lane return LANE; 301 llc return LLC; 302 metac return METAC; 303 bcc return BCC; 304 oam return OAM; 305 oamf4 return OAMF4; 306 oamf4ec return OAMF4EC; 307 oamf4sc return OAMF4SC; 308 sc return SC; 309 ilmic return ILMIC; 310 vpi return VPI; 311 vci return VCI; 312 connectmsg return CONNECTMSG; 313 metaconnect return METACONNECT; 314 315 on|ifname return PF_IFNAME; 316 rset|ruleset return PF_RSET; 317 rnr|rulenum return PF_RNR; 318 srnr|subrulenum return PF_SRNR; 319 reason return PF_REASON; 320 action return PF_ACTION; 321 322 fisu return FISU; 323 lssu return LSSU; 324 lsu return LSSU; 325 msu return MSU; 326 sio return SIO; 327 opc return OPC; 328 dpc return DPC; 329 sls return SLS; 330 331 [ \r\n\t] ; 332 [+\-*/:\[\]!<>()&|=] return yytext[0]; 333 ">=" return GEQ; 334 "<=" return LEQ; 335 "!=" return NEQ; 336 "==" return '='; 337 "<<" return LSH; 338 ">>" return RSH; 339 ${B} { yylval.e = pcap_ether_aton(((char *)yytext)+1); 340 return AID; } 341 {MAC} { yylval.e = pcap_ether_aton((char *)yytext); 342 return EID; } 343 {N} { yylval.i = stoi((char *)yytext); return NUM; } 344 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) { 345 yylval.s = sdup((char *)yytext); return HID; } 346 {V6} { 347 #ifdef INET6 348 struct addrinfo hints, *res; 349 memset(&hints, 0, sizeof(hints)); 350 hints.ai_family = AF_INET6; 351 hints.ai_flags = AI_NUMERICHOST; 352 if (getaddrinfo(yytext, NULL, &hints, &res)) 353 bpf_error("bogus IPv6 address %s", yytext); 354 else { 355 freeaddrinfo(res); 356 yylval.s = sdup((char *)yytext); return HID6; 357 } 358 #else 359 bpf_error("IPv6 address %s not supported", yytext); 360 #endif /*INET6*/ 361 } 362 {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); } 363 icmptype { yylval.i = 0; return NUM; } 364 icmpcode { yylval.i = 1; return NUM; } 365 icmp-echoreply { yylval.i = 0; return NUM; } 366 icmp-unreach { yylval.i = 3; return NUM; } 367 icmp-sourcequench { yylval.i = 4; return NUM; } 368 icmp-redirect { yylval.i = 5; return NUM; } 369 icmp-echo { yylval.i = 8; return NUM; } 370 icmp-routeradvert { yylval.i = 9; return NUM; } 371 icmp-routersolicit { yylval.i = 10; return NUM; } 372 icmp-timxceed { yylval.i = 11; return NUM; } 373 icmp-paramprob { yylval.i = 12; return NUM; } 374 icmp-tstamp { yylval.i = 13; return NUM; } 375 icmp-tstampreply { yylval.i = 14; return NUM; } 376 icmp-ireq { yylval.i = 15; return NUM; } 377 icmp-ireqreply { yylval.i = 16; return NUM; } 378 icmp-maskreq { yylval.i = 17; return NUM; } 379 icmp-maskreply { yylval.i = 18; return NUM; } 380 tcpflags { yylval.i = 13; return NUM; } 381 tcp-fin { yylval.i = 0x01; return NUM; } 382 tcp-syn { yylval.i = 0x02; return NUM; } 383 tcp-rst { yylval.i = 0x04; return NUM; } 384 tcp-push { yylval.i = 0x08; return NUM; } 385 tcp-ack { yylval.i = 0x10; return NUM; } 386 tcp-urg { yylval.i = 0x20; return NUM; } 387 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? { 388 yylval.s = sdup((char *)yytext); return ID; } 389 "\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; } 390 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { 391 bpf_error("illegal token: %s", yytext); } 392 . { bpf_error("illegal char '%c'", *yytext); } 393 %% 394 void 395 lex_init(buf) 396 const char *buf; 397 { 398 #ifdef FLEX_SCANNER 399 in_buffer = yy_scan_string(buf); 400 #else 401 in_buffer = buf; 402 #endif 403 } 404 405 /* 406 * Do any cleanup necessary after parsing. 407 */ 408 void 409 lex_cleanup() 410 { 411 #ifdef FLEX_SCANNER 412 if (in_buffer != NULL) 413 yy_delete_buffer(in_buffer); 414 in_buffer = NULL; 415 #endif 416 } 417 418 /* 419 * Also define a yywrap. Note that if we're using flex, it will 420 * define a macro to map this identifier to pcap_wrap. 421 */ 422 int 423 yywrap() 424 { 425 return 1; 426 } 427 428 /* Hex digit to integer. */ 429 static inline int 430 xdtoi(c) 431 register int c; 432 { 433 if (isdigit(c)) 434 return c - '0'; 435 else if (islower(c)) 436 return c - 'a' + 10; 437 else 438 return c - 'A' + 10; 439 } 440 441 /* 442 * Convert string to integer. Just like atoi(), but checks for 443 * preceding 0x or 0 and uses hex or octal instead of decimal. 444 */ 445 static int 446 stoi(s) 447 char *s; 448 { 449 int base = 10; 450 int n = 0; 451 452 if (*s == '0') { 453 if (s[1] == 'x' || s[1] == 'X') { 454 s += 2; 455 base = 16; 456 } 457 else { 458 base = 8; 459 s += 1; 460 } 461 } 462 while (*s) 463 n = n * base + xdtoi(*s++); 464 465 return n; 466 } 467