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 1.110.2.2 2008/02/06 10:21:47 guy Exp $ (LBL)"; 26 #endif 27 28 #ifdef HAVE_CONFIG_H 29 #include "config.h" 30 #endif 31 32 #include <ctype.h> 33 #include <string.h> 34 35 #include "pcap-int.h" 36 37 #include "gencode.h" 38 #ifdef INET6 39 #ifdef WIN32 40 #include <pcap-stdinc.h> 41 42 #ifdef __MINGW32__ 43 #include "IP6_misc.h" 44 #endif 45 #else /* WIN32 */ 46 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */ 47 #include <netdb.h> /* for "struct addrinfo" */ 48 #endif /* WIN32 */ 49 50 /* Workaround for AIX 4.3 */ 51 #if !defined(AI_NUMERICHOST) 52 #define AI_NUMERICHOST 0x04 53 #endif 54 #endif /*INET6*/ 55 #include <pcap/namedb.h> 56 #include "tokdefs.h" 57 58 #ifdef HAVE_OS_PROTO_H 59 #include "os-proto.h" 60 #endif 61 62 static int stoi(char *); 63 static inline int xdtoi(int); 64 65 #ifdef FLEX_SCANNER 66 #define YY_NO_UNPUT 67 static YY_BUFFER_STATE in_buffer; 68 #else 69 static char *in_buffer; 70 71 #undef getc 72 #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++) 73 #endif 74 75 #define yylval pcap_lval 76 extern YYSTYPE yylval; 77 78 %} 79 80 N ([0-9]+|(0X|0x)[0-9A-Fa-f]+) 81 B ([0-9A-Fa-f][0-9A-Fa-f]?) 82 B2 ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]) 83 W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?) 84 85 %a 18400 86 %o 21500 87 %e 7600 88 %k 4550 89 %p 27600 90 %n 2000 91 92 V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} 93 94 V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} 95 V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} 96 V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} 97 V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} 98 V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} 99 V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} 100 V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} 101 V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: 102 103 V660 ::{W}:{W}:{W}:{W}:{W}:{W} 104 V661 {W}::{W}:{W}:{W}:{W}:{W} 105 V662 {W}:{W}::{W}:{W}:{W}:{W} 106 V663 {W}:{W}:{W}::{W}:{W}:{W} 107 V664 {W}:{W}:{W}:{W}::{W}:{W} 108 V665 {W}:{W}:{W}:{W}:{W}::{W} 109 V666 {W}:{W}:{W}:{W}:{W}:{W}:: 110 111 V650 ::{W}:{W}:{W}:{W}:{W} 112 V651 {W}::{W}:{W}:{W}:{W} 113 V652 {W}:{W}::{W}:{W}:{W} 114 V653 {W}:{W}:{W}::{W}:{W} 115 V654 {W}:{W}:{W}:{W}::{W} 116 V655 {W}:{W}:{W}:{W}:{W}:: 117 118 V640 ::{W}:{W}:{W}:{W} 119 V641 {W}::{W}:{W}:{W} 120 V642 {W}:{W}::{W}:{W} 121 V643 {W}:{W}:{W}::{W} 122 V644 {W}:{W}:{W}:{W}:: 123 124 V630 ::{W}:{W}:{W} 125 V631 {W}::{W}:{W} 126 V632 {W}:{W}::{W} 127 V633 {W}:{W}:{W}:: 128 129 V620 ::{W}:{W} 130 V621 {W}::{W} 131 V622 {W}:{W}:: 132 133 V610 ::{W} 134 V611 {W}:: 135 136 V600 :: 137 138 V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 139 140 V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 141 V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 142 V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 143 V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 144 V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 145 V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 146 147 V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 148 V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 149 V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 150 V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 151 V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 152 153 V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 154 V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 155 V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 156 V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 157 158 V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} 159 V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} 160 V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} 161 162 V6104 ::{W}:{N}\.{N}\.{N}\.{N} 163 V6114 {W}::{N}\.{N}\.{N}\.{N} 164 165 V6004 ::{N}\.{N}\.{N}\.{N} 166 167 168 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}) 169 170 MAC ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3}) 171 172 173 174 %% 175 dst return DST; 176 src return SRC; 177 178 link|ether|ppp|slip return LINK; 179 fddi|tr|wlan return LINK; 180 arp return ARP; 181 rarp return RARP; 182 ip return IP; 183 sctp return SCTP; 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 vrrp return VRRP; 191 radio return RADIO; 192 193 ip6 { 194 #ifdef INET6 195 return IPV6; 196 #else 197 bpf_error("%s not supported", yytext); 198 #endif 199 } 200 icmp6 { 201 #ifdef INET6 202 return ICMPV6; 203 #else 204 bpf_error("%s not supported", yytext); 205 #endif 206 } 207 ah return AH; 208 esp return ESP; 209 210 atalk return ATALK; 211 aarp return AARP; 212 decnet return DECNET; 213 lat return LAT; 214 sca return SCA; 215 moprc return MOPRC; 216 mopdl return MOPDL; 217 218 iso return ISO; 219 esis return ESIS; 220 es-is return ESIS; 221 isis return ISIS; 222 is-is return ISIS; 223 l1 return L1; 224 l2 return L2; 225 iih return IIH; 226 lsp return LSP; 227 snp return SNP; 228 csnp return CSNP; 229 psnp return PSNP; 230 231 clnp return CLNP; 232 233 stp return STP; 234 235 ipx return IPX; 236 237 netbeui return NETBEUI; 238 239 host return HOST; 240 net return NET; 241 mask return NETMASK; 242 port return PORT; 243 portrange return PORTRANGE; 244 proto return PROTO; 245 protochain { 246 #ifdef NO_PROTOCHAIN 247 bpf_error("%s not supported", yytext); 248 #else 249 return PROTOCHAIN; 250 #endif 251 } 252 253 gateway return GATEWAY; 254 255 type return TYPE; 256 subtype return SUBTYPE; 257 direction|dir return DIR; 258 address1|addr1 return ADDR1; 259 address2|addr2 return ADDR2; 260 address3|addr3 return ADDR3; 261 address4|addr4 return ADDR4; 262 263 less return LESS; 264 greater return GREATER; 265 byte return CBYTE; 266 broadcast return TK_BROADCAST; 267 multicast return TK_MULTICAST; 268 269 and|"&&" return AND; 270 or|"||" return OR; 271 not return '!'; 272 273 len|length return LEN; 274 inbound return INBOUND; 275 outbound return OUTBOUND; 276 277 vlan return VLAN; 278 mpls return MPLS; 279 pppoed return PPPOED; 280 pppoes return PPPOES; 281 282 lane return LANE; 283 llc return LLC; 284 metac return METAC; 285 bcc return BCC; 286 oam return OAM; 287 oamf4 return OAMF4; 288 oamf4ec return OAMF4EC; 289 oamf4sc return OAMF4SC; 290 sc return SC; 291 ilmic return ILMIC; 292 vpi return VPI; 293 vci return VCI; 294 connectmsg return CONNECTMSG; 295 metaconnect return METACONNECT; 296 297 on|ifname return PF_IFNAME; 298 rset|ruleset return PF_RSET; 299 rnr|rulenum return PF_RNR; 300 srnr|subrulenum return PF_SRNR; 301 reason return PF_REASON; 302 action return PF_ACTION; 303 304 fisu return FISU; 305 lssu return LSSU; 306 lsu return LSSU; 307 msu return MSU; 308 sio return SIO; 309 opc return OPC; 310 dpc return DPC; 311 sls return SLS; 312 313 [ \r\n\t] ; 314 [+\-*/:\[\]!<>()&|=] return yytext[0]; 315 ">=" return GEQ; 316 "<=" return LEQ; 317 "!=" return NEQ; 318 "==" return '='; 319 "<<" return LSH; 320 ">>" return RSH; 321 ${B} { yylval.e = pcap_ether_aton(((char *)yytext)+1); 322 return AID; } 323 {MAC} { yylval.e = pcap_ether_aton((char *)yytext); 324 return EID; } 325 {N} { yylval.i = stoi((char *)yytext); return NUM; } 326 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) { 327 yylval.s = sdup((char *)yytext); return HID; } 328 {V6} { 329 #ifdef INET6 330 struct addrinfo hints, *res; 331 memset(&hints, 0, sizeof(hints)); 332 hints.ai_family = AF_INET6; 333 hints.ai_flags = AI_NUMERICHOST; 334 if (getaddrinfo(yytext, NULL, &hints, &res)) 335 bpf_error("bogus IPv6 address %s", yytext); 336 else { 337 yylval.s = sdup((char *)yytext); return HID6; 338 } 339 #else 340 bpf_error("IPv6 address %s not supported", yytext); 341 #endif /*INET6*/ 342 } 343 {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); } 344 icmptype { yylval.i = 0; return NUM; } 345 icmpcode { yylval.i = 1; return NUM; } 346 icmp-echoreply { yylval.i = 0; return NUM; } 347 icmp-unreach { yylval.i = 3; return NUM; } 348 icmp-sourcequench { yylval.i = 4; return NUM; } 349 icmp-redirect { yylval.i = 5; return NUM; } 350 icmp-echo { yylval.i = 8; return NUM; } 351 icmp-routeradvert { yylval.i = 9; return NUM; } 352 icmp-routersolicit { yylval.i = 10; return NUM; } 353 icmp-timxceed { yylval.i = 11; return NUM; } 354 icmp-paramprob { yylval.i = 12; return NUM; } 355 icmp-tstamp { yylval.i = 13; return NUM; } 356 icmp-tstampreply { yylval.i = 14; return NUM; } 357 icmp-ireq { yylval.i = 15; return NUM; } 358 icmp-ireqreply { yylval.i = 16; return NUM; } 359 icmp-maskreq { yylval.i = 17; return NUM; } 360 icmp-maskreply { yylval.i = 18; return NUM; } 361 tcpflags { yylval.i = 13; return NUM; } 362 tcp-fin { yylval.i = 0x01; return NUM; } 363 tcp-syn { yylval.i = 0x02; return NUM; } 364 tcp-rst { yylval.i = 0x04; return NUM; } 365 tcp-push { yylval.i = 0x08; return NUM; } 366 tcp-ack { yylval.i = 0x10; return NUM; } 367 tcp-urg { yylval.i = 0x20; return NUM; } 368 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? { 369 yylval.s = sdup((char *)yytext); return ID; } 370 "\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; } 371 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { 372 bpf_error("illegal token: %s", yytext); } 373 . { bpf_error("illegal char '%c'", *yytext); } 374 %% 375 void 376 lex_init(buf) 377 const char *buf; 378 { 379 #ifdef FLEX_SCANNER 380 in_buffer = yy_scan_string(buf); 381 #else 382 in_buffer = buf; 383 #endif 384 } 385 386 /* 387 * Do any cleanup necessary after parsing. 388 */ 389 void 390 lex_cleanup() 391 { 392 #ifdef FLEX_SCANNER 393 if (in_buffer != NULL) 394 yy_delete_buffer(in_buffer); 395 in_buffer = NULL; 396 #endif 397 } 398 399 /* 400 * Also define a yywrap. Note that if we're using flex, it will 401 * define a macro to map this identifier to pcap_wrap. 402 */ 403 int 404 yywrap() 405 { 406 return 1; 407 } 408 409 /* Hex digit to integer. */ 410 static inline int 411 xdtoi(c) 412 register int c; 413 { 414 if (isdigit(c)) 415 return c - '0'; 416 else if (islower(c)) 417 return c - 'a' + 10; 418 else 419 return c - 'A' + 10; 420 } 421 422 /* 423 * Convert string to integer. Just like atoi(), but checks for 424 * preceding 0x or 0 and uses hex or octal instead of decimal. 425 */ 426 static int 427 stoi(s) 428 char *s; 429 { 430 int base = 10; 431 int n = 0; 432 433 if (*s == '0') { 434 if (s[1] == 'x' || s[1] == 'X') { 435 s += 2; 436 base = 16; 437 } 438 else { 439 base = 8; 440 s += 1; 441 } 442 } 443 while (*s) 444 n = n * base + xdtoi(*s++); 445 446 return n; 447 } 448