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 24static 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 76static int stoi(char *); 77static inline int xdtoi(int); 78 79#ifdef FLEX_SCANNER 80#define YY_NO_INPUT 81#define YY_NO_UNPUT 82static YY_BUFFER_STATE in_buffer; 83#else 84static 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 91extern YYSTYPE yylval; 92 93%} 94 95N ([0-9]+|(0X|0x)[0-9A-Fa-f]+) 96B ([0-9A-Fa-f][0-9A-Fa-f]?) 97B2 ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]) 98W ([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 107V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} 108 109V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} 110V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} 111V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} 112V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} 113V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} 114V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} 115V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} 116V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: 117 118V660 ::{W}:{W}:{W}:{W}:{W}:{W} 119V661 {W}::{W}:{W}:{W}:{W}:{W} 120V662 {W}:{W}::{W}:{W}:{W}:{W} 121V663 {W}:{W}:{W}::{W}:{W}:{W} 122V664 {W}:{W}:{W}:{W}::{W}:{W} 123V665 {W}:{W}:{W}:{W}:{W}::{W} 124V666 {W}:{W}:{W}:{W}:{W}:{W}:: 125 126V650 ::{W}:{W}:{W}:{W}:{W} 127V651 {W}::{W}:{W}:{W}:{W} 128V652 {W}:{W}::{W}:{W}:{W} 129V653 {W}:{W}:{W}::{W}:{W} 130V654 {W}:{W}:{W}:{W}::{W} 131V655 {W}:{W}:{W}:{W}:{W}:: 132 133V640 ::{W}:{W}:{W}:{W} 134V641 {W}::{W}:{W}:{W} 135V642 {W}:{W}::{W}:{W} 136V643 {W}:{W}:{W}::{W} 137V644 {W}:{W}:{W}:{W}:: 138 139V630 ::{W}:{W}:{W} 140V631 {W}::{W}:{W} 141V632 {W}:{W}::{W} 142V633 {W}:{W}:{W}:: 143 144V620 ::{W}:{W} 145V621 {W}::{W} 146V622 {W}:{W}:: 147 148V610 ::{W} 149V611 {W}:: 150 151V600 :: 152 153V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 154 155V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 156V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 157V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 158V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 159V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 160V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 161 162V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 163V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 164V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 165V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 166V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 167 168V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 169V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 170V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 171V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 172 173V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} 174V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} 175V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} 176 177V6104 ::{W}:{N}\.{N}\.{N}\.{N} 178V6114 {W}::{N}\.{N}\.{N}\.{N} 179 180V6004 ::{N}\.{N}\.{N}\.{N} 181 182 183V6 ({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 185MAC ({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%% 190dst return DST; 191src return SRC; 192 193link|ether|ppp|slip return LINK; 194fddi|tr|wlan return LINK; 195arp return ARP; 196rarp return RARP; 197ip return IP; 198sctp return SCTP; 199tcp return TCP; 200udp return UDP; 201icmp return ICMP; 202igmp return IGMP; 203igrp return IGRP; 204pim return PIM; 205vrrp return VRRP; 206carp return CARP; 207radio return RADIO; 208 209ip6 { 210#ifdef INET6 211 return IPV6; 212#else 213 bpf_error("%s not supported", yytext); 214#endif 215 } 216icmp6 { 217#ifdef INET6 218 return ICMPV6; 219#else 220 bpf_error("%s not supported", yytext); 221#endif 222 } 223ah return AH; 224esp return ESP; 225 226atalk return ATALK; 227aarp return AARP; 228decnet return DECNET; 229lat return LAT; 230sca return SCA; 231moprc return MOPRC; 232mopdl return MOPDL; 233 234iso return ISO; 235esis return ESIS; 236es-is return ESIS; 237isis return ISIS; 238is-is return ISIS; 239l1 return L1; 240l2 return L2; 241iih return IIH; 242lsp return LSP; 243snp return SNP; 244csnp return CSNP; 245psnp return PSNP; 246 247clnp return CLNP; 248 249stp return STP; 250 251ipx return IPX; 252 253netbeui return NETBEUI; 254 255host return HOST; 256net return NET; 257mask return NETMASK; 258port return PORT; 259portrange return PORTRANGE; 260proto return PROTO; 261protochain { 262#ifdef NO_PROTOCHAIN 263 bpf_error("%s not supported", yytext); 264#else 265 return PROTOCHAIN; 266#endif 267 } 268 269gateway return GATEWAY; 270 271type return TYPE; 272subtype return SUBTYPE; 273direction|dir return DIR; 274address1|addr1 return ADDR1; 275address2|addr2 return ADDR2; 276address3|addr3 return ADDR3; 277address4|addr4 return ADDR4; 278ra return RA; 279ta return TA; 280 281less return LESS; 282greater return GREATER; 283byte return CBYTE; 284broadcast return TK_BROADCAST; 285multicast return TK_MULTICAST; 286 287and|"&&" return AND; 288or|"||" return OR; 289not return '!'; 290 291len|length return LEN; 292inbound return INBOUND; 293outbound return OUTBOUND; 294 295vlan return VLAN; 296mpls return MPLS; 297pppoed return PPPOED; 298pppoes return PPPOES; 299 300lane return LANE; 301llc return LLC; 302metac return METAC; 303bcc return BCC; 304oam return OAM; 305oamf4 return OAMF4; 306oamf4ec return OAMF4EC; 307oamf4sc return OAMF4SC; 308sc return SC; 309ilmic return ILMIC; 310vpi return VPI; 311vci return VCI; 312connectmsg return CONNECTMSG; 313metaconnect return METACONNECT; 314 315on|ifname return PF_IFNAME; 316rset|ruleset return PF_RSET; 317rnr|rulenum return PF_RNR; 318srnr|subrulenum return PF_SRNR; 319reason return PF_REASON; 320action return PF_ACTION; 321 322fisu return FISU; 323lssu return LSSU; 324lsu return LSSU; 325msu return MSU; 326sio return SIO; 327opc return OPC; 328dpc return DPC; 329sls 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); } 363icmptype { yylval.i = 0; return NUM; } 364icmpcode { yylval.i = 1; return NUM; } 365icmp-echoreply { yylval.i = 0; return NUM; } 366icmp-unreach { yylval.i = 3; return NUM; } 367icmp-sourcequench { yylval.i = 4; return NUM; } 368icmp-redirect { yylval.i = 5; return NUM; } 369icmp-echo { yylval.i = 8; return NUM; } 370icmp-routeradvert { yylval.i = 9; return NUM; } 371icmp-routersolicit { yylval.i = 10; return NUM; } 372icmp-timxceed { yylval.i = 11; return NUM; } 373icmp-paramprob { yylval.i = 12; return NUM; } 374icmp-tstamp { yylval.i = 13; return NUM; } 375icmp-tstampreply { yylval.i = 14; return NUM; } 376icmp-ireq { yylval.i = 15; return NUM; } 377icmp-ireqreply { yylval.i = 16; return NUM; } 378icmp-maskreq { yylval.i = 17; return NUM; } 379icmp-maskreply { yylval.i = 18; return NUM; } 380tcpflags { yylval.i = 13; return NUM; } 381tcp-fin { yylval.i = 0x01; return NUM; } 382tcp-syn { yylval.i = 0x02; return NUM; } 383tcp-rst { yylval.i = 0x04; return NUM; } 384tcp-push { yylval.i = 0x08; return NUM; } 385tcp-ack { yylval.i = 0x10; return NUM; } 386tcp-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%% 394void 395lex_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 */ 408void 409lex_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 */ 422int 423yywrap() 424{ 425 return 1; 426} 427 428/* Hex digit to integer. */ 429static inline int 430xdtoi(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 */ 445static int 446stoi(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