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