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 1.99.2.9 2007/06/11 09:52:05 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 W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?) 83 84 %a 18400 85 %o 21500 86 %e 7600 87 %k 4550 88 %p 27600 89 %n 2000 90 91 V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} 92 93 V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} 94 V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} 95 V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} 96 V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} 97 V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} 98 V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} 99 V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} 100 V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: 101 102 V660 ::{W}:{W}:{W}:{W}:{W}:{W} 103 V661 {W}::{W}:{W}:{W}:{W}:{W} 104 V662 {W}:{W}::{W}:{W}:{W}:{W} 105 V663 {W}:{W}:{W}::{W}:{W}:{W} 106 V664 {W}:{W}:{W}:{W}::{W}:{W} 107 V665 {W}:{W}:{W}:{W}:{W}::{W} 108 V666 {W}:{W}:{W}:{W}:{W}:{W}:: 109 110 V650 ::{W}:{W}:{W}:{W}:{W} 111 V651 {W}::{W}:{W}:{W}:{W} 112 V652 {W}:{W}::{W}:{W}:{W} 113 V653 {W}:{W}:{W}::{W}:{W} 114 V654 {W}:{W}:{W}:{W}::{W} 115 V655 {W}:{W}:{W}:{W}:{W}:: 116 117 V640 ::{W}:{W}:{W}:{W} 118 V641 {W}::{W}:{W}:{W} 119 V642 {W}:{W}::{W}:{W} 120 V643 {W}:{W}:{W}::{W} 121 V644 {W}:{W}:{W}:{W}:: 122 123 V630 ::{W}:{W}:{W} 124 V631 {W}::{W}:{W} 125 V632 {W}:{W}::{W} 126 V633 {W}:{W}:{W}:: 127 128 V620 ::{W}:{W} 129 V621 {W}::{W} 130 V622 {W}:{W}:: 131 132 V610 ::{W} 133 V611 {W}:: 134 135 V600 :: 136 137 V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 138 139 V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 140 V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 141 V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 142 V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 143 V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 144 V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 145 146 V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 147 V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 148 V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 149 V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 150 V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 151 152 V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 153 V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 154 V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 155 V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 156 157 V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} 158 V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} 159 V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} 160 161 V6104 ::{W}:{N}\.{N}\.{N}\.{N} 162 V6114 {W}::{N}\.{N}\.{N}\.{N} 163 164 V6004 ::{N}\.{N}\.{N}\.{N} 165 166 167 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}) 168 169 %% 170 dst return DST; 171 src return SRC; 172 173 link|ether|ppp|slip return LINK; 174 fddi|tr|wlan return LINK; 175 arp return ARP; 176 rarp return RARP; 177 ip return IP; 178 sctp return SCTP; 179 tcp return TCP; 180 udp return UDP; 181 icmp return ICMP; 182 igmp return IGMP; 183 igrp return IGRP; 184 pim return PIM; 185 vrrp return VRRP; 186 radio return RADIO; 187 188 ip6 { 189 #ifdef INET6 190 return IPV6; 191 #else 192 bpf_error("%s not supported", yytext); 193 #endif 194 } 195 icmp6 { 196 #ifdef INET6 197 return ICMPV6; 198 #else 199 bpf_error("%s not supported", yytext); 200 #endif 201 } 202 ah return AH; 203 esp return ESP; 204 205 atalk return ATALK; 206 aarp return AARP; 207 decnet return DECNET; 208 lat return LAT; 209 sca return SCA; 210 moprc return MOPRC; 211 mopdl return MOPDL; 212 213 iso return ISO; 214 esis return ESIS; 215 es-is return ESIS; 216 isis return ISIS; 217 is-is return ISIS; 218 l1 return L1; 219 l2 return L2; 220 iih return IIH; 221 lsp return LSP; 222 snp return SNP; 223 csnp return CSNP; 224 psnp return PSNP; 225 226 clnp return CLNP; 227 228 stp return STP; 229 230 ipx return IPX; 231 232 netbeui return NETBEUI; 233 234 host return HOST; 235 net return NET; 236 mask return NETMASK; 237 port return PORT; 238 portrange return PORTRANGE; 239 proto return PROTO; 240 protochain { 241 #ifdef NO_PROTOCHAIN 242 bpf_error("%s not supported", yytext); 243 #else 244 return PROTOCHAIN; 245 #endif 246 } 247 248 gateway return GATEWAY; 249 250 less return LESS; 251 greater return GREATER; 252 byte return CBYTE; 253 broadcast return TK_BROADCAST; 254 multicast return TK_MULTICAST; 255 256 and|"&&" return AND; 257 or|"||" return OR; 258 not return '!'; 259 260 len|length return LEN; 261 inbound return INBOUND; 262 outbound return OUTBOUND; 263 264 vlan return VLAN; 265 mpls return MPLS; 266 pppoed return PPPOED; 267 pppoes return PPPOES; 268 269 lane return LANE; 270 llc return LLC; 271 metac return METAC; 272 bcc return BCC; 273 oam return OAM; 274 oamf4 return OAMF4; 275 oamf4ec return OAMF4EC; 276 oamf4sc return OAMF4SC; 277 sc return SC; 278 ilmic return ILMIC; 279 vpi return VPI; 280 vci return VCI; 281 connectmsg return CONNECTMSG; 282 metaconnect return METACONNECT; 283 284 on|ifname return PF_IFNAME; 285 rset|ruleset return PF_RSET; 286 rnr|rulenum return PF_RNR; 287 srnr|subrulenum return PF_SRNR; 288 reason return PF_REASON; 289 action return PF_ACTION; 290 291 fisu return FISU; 292 lssu return LSSU; 293 lsu return LSSU; 294 msu return MSU; 295 sio return SIO; 296 opc return OPC; 297 dpc return DPC; 298 sls return SLS; 299 300 [ \r\n\t] ; 301 [+\-*/:\[\]!<>()&|=] return yytext[0]; 302 ">=" return GEQ; 303 "<=" return LEQ; 304 "!=" return NEQ; 305 "==" return '='; 306 "<<" return LSH; 307 ">>" return RSH; 308 ${B} { yylval.e = pcap_ether_aton(((char *)yytext)+1); 309 return AID; } 310 {N} { yylval.i = stoi((char *)yytext); return NUM; } 311 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) { 312 yylval.s = sdup((char *)yytext); return HID; } 313 {B}:{B}:{B}:{B}:{B}:{B} { yylval.e = pcap_ether_aton((char *)yytext); 314 return EID; } 315 {V6} { 316 #ifdef INET6 317 struct addrinfo hints, *res; 318 memset(&hints, 0, sizeof(hints)); 319 hints.ai_family = AF_INET6; 320 hints.ai_flags = AI_NUMERICHOST; 321 if (getaddrinfo(yytext, NULL, &hints, &res)) 322 bpf_error("bogus IPv6 address %s", yytext); 323 else { 324 yylval.s = sdup((char *)yytext); return HID6; 325 } 326 #else 327 bpf_error("IPv6 address %s not supported", yytext); 328 #endif /*INET6*/ 329 } 330 {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); } 331 icmptype { yylval.i = 0; return NUM; } 332 icmpcode { yylval.i = 1; return NUM; } 333 icmp-echoreply { yylval.i = 0; return NUM; } 334 icmp-unreach { yylval.i = 3; return NUM; } 335 icmp-sourcequench { yylval.i = 4; return NUM; } 336 icmp-redirect { yylval.i = 5; return NUM; } 337 icmp-echo { yylval.i = 8; return NUM; } 338 icmp-routeradvert { yylval.i = 9; return NUM; } 339 icmp-routersolicit { yylval.i = 10; return NUM; } 340 icmp-timxceed { yylval.i = 11; return NUM; } 341 icmp-paramprob { yylval.i = 12; return NUM; } 342 icmp-tstamp { yylval.i = 13; return NUM; } 343 icmp-tstampreply { yylval.i = 14; return NUM; } 344 icmp-ireq { yylval.i = 15; return NUM; } 345 icmp-ireqreply { yylval.i = 16; return NUM; } 346 icmp-maskreq { yylval.i = 17; return NUM; } 347 icmp-maskreply { yylval.i = 18; return NUM; } 348 tcpflags { yylval.i = 13; return NUM; } 349 tcp-fin { yylval.i = 0x01; return NUM; } 350 tcp-syn { yylval.i = 0x02; return NUM; } 351 tcp-rst { yylval.i = 0x04; return NUM; } 352 tcp-push { yylval.i = 0x08; return NUM; } 353 tcp-ack { yylval.i = 0x10; return NUM; } 354 tcp-urg { yylval.i = 0x20; return NUM; } 355 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? { 356 yylval.s = sdup((char *)yytext); return ID; } 357 "\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; } 358 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { 359 bpf_error("illegal token: %s", yytext); } 360 . { bpf_error("illegal char '%c'", *yytext); } 361 %% 362 void 363 lex_init(buf) 364 const char *buf; 365 { 366 #ifdef FLEX_SCANNER 367 in_buffer = yy_scan_string(buf); 368 #else 369 in_buffer = buf; 370 #endif 371 } 372 373 /* 374 * Do any cleanup necessary after parsing. 375 */ 376 void 377 lex_cleanup() 378 { 379 #ifdef FLEX_SCANNER 380 if (in_buffer != NULL) 381 yy_delete_buffer(in_buffer); 382 in_buffer = NULL; 383 #endif 384 } 385 386 /* 387 * Also define a yywrap. Note that if we're using flex, it will 388 * define a macro to map this identifier to pcap_wrap. 389 */ 390 int 391 yywrap() 392 { 393 return 1; 394 } 395 396 /* Hex digit to integer. */ 397 static inline int 398 xdtoi(c) 399 register int c; 400 { 401 if (isdigit(c)) 402 return c - '0'; 403 else if (islower(c)) 404 return c - 'a' + 10; 405 else 406 return c - 'A' + 10; 407 } 408 409 /* 410 * Convert string to integer. Just like atoi(), but checks for 411 * preceding 0x or 0 and uses hex or octal instead of decimal. 412 */ 413 static int 414 stoi(s) 415 char *s; 416 { 417 int base = 10; 418 int n = 0; 419 420 if (*s == '0') { 421 if (s[1] == 'x' || s[1] == 'X') { 422 s += 2; 423 base = 16; 424 } 425 else { 426 base = 8; 427 s += 1; 428 } 429 } 430 while (*s) 431 n = n * base + xdtoi(*s++); 432 433 return n; 434 } 435
