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		return IPV6;
210icmp6		return ICMPV6;
211ah		return AH;
212esp		return ESP;
213
214atalk		return ATALK;
215aarp		return AARP;
216decnet		return DECNET;
217lat		return LAT;
218sca		return SCA;
219moprc		return MOPRC;
220mopdl		return MOPDL;
221
222iso		return ISO;
223esis		return ESIS;
224es-is		return ESIS;
225isis		return ISIS;
226is-is		return ISIS;
227l1              return L1;
228l2              return L2;
229iih             return IIH;
230lsp             return LSP;
231snp             return SNP;
232csnp            return CSNP;
233psnp            return PSNP;
234
235clnp		return CLNP;
236
237stp		return STP;
238
239ipx		return IPX;
240
241netbeui		return NETBEUI;
242
243host		return HOST;
244net		return NET;
245mask		return NETMASK;
246port		return PORT;
247portrange	return PORTRANGE;
248proto		return PROTO;
249protochain	{
250#ifdef NO_PROTOCHAIN
251		  bpf_error("%s not supported", yytext);
252#else
253		  return PROTOCHAIN;
254#endif
255		}
256
257gateway		return GATEWAY;
258
259type		return TYPE;
260subtype		return SUBTYPE;
261direction|dir	return DIR;
262address1|addr1	return ADDR1;
263address2|addr2	return ADDR2;
264address3|addr3	return ADDR3;
265address4|addr4	return ADDR4;
266ra		return RA;
267ta		return TA;
268
269less		return LESS;
270greater		return GREATER;
271byte		return CBYTE;
272broadcast	return TK_BROADCAST;
273multicast	return TK_MULTICAST;
274
275and|"&&"	return AND;
276or|"||"		return OR;
277not		return '!';
278
279len|length	return LEN;
280inbound		return INBOUND;
281outbound	return OUTBOUND;
282
283vlan		return VLAN;
284mpls		return MPLS;
285pppoed		return PPPOED;
286pppoes		return PPPOES;
287
288lane		return LANE;
289llc		return LLC;
290metac		return METAC;
291bcc		return BCC;
292oam		return OAM;
293oamf4		return OAMF4;
294oamf4ec		return OAMF4EC;
295oamf4sc		return OAMF4SC;
296sc		return SC;
297ilmic		return ILMIC;
298vpi		return VPI;
299vci		return VCI;
300connectmsg	return CONNECTMSG;
301metaconnect	return METACONNECT;
302
303on|ifname	return PF_IFNAME;
304rset|ruleset	return PF_RSET;
305rnr|rulenum	return PF_RNR;
306srnr|subrulenum	return PF_SRNR;
307reason		return PF_REASON;
308action		return PF_ACTION;
309
310fisu		return FISU;
311lssu		return LSSU;
312lsu		return LSSU;
313msu		return MSU;
314hfisu		return HFISU;
315hlssu		return HLSSU;
316hmsu		return HMSU;
317sio		return SIO;
318opc		return OPC;
319dpc		return DPC;
320sls		return SLS;
321hsio		return HSIO;
322hopc		return HOPC;
323hdpc		return HDPC;
324hsls		return HSLS;
325
326[ \r\n\t]		;
327[+\-*/:\[\]!<>()&|=]	return yytext[0];
328">="			return GEQ;
329"<="			return LEQ;
330"!="			return NEQ;
331"=="			return '=';
332"<<"			return LSH;
333">>"			return RSH;
334${B}			{ yylval.e = pcap_ether_aton(((char *)yytext)+1);
335			  if (yylval.e == NULL)
336				bpf_error("malloc");
337			  return AID; }
338{MAC}			{ yylval.e = pcap_ether_aton((char *)yytext);
339			  if (yylval.e == NULL)
340				bpf_error("malloc");
341			  return EID; }
342{N}			{ yylval.i = stoi((char *)yytext); return NUM; }
343({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N})	{
344			yylval.s = sdup((char *)yytext); return HID; }
345{V6}			{
346#ifdef INET6
347			  struct addrinfo hints, *res;
348			  memset(&hints, 0, sizeof(hints));
349			  hints.ai_family = AF_INET6;
350			  hints.ai_flags = AI_NUMERICHOST;
351			  if (getaddrinfo(yytext, NULL, &hints, &res))
352				bpf_error("bogus IPv6 address %s", yytext);
353			  else {
354				freeaddrinfo(res);
355				yylval.s = sdup((char *)yytext); return HID6;
356			  }
357#else
358			  bpf_error("IPv6 address %s not supported", yytext);
359#endif /*INET6*/
360			}
361{B}:+({B}:+)+		{ bpf_error("bogus ethernet address %s", yytext); }
362icmptype		{ yylval.i = 0; return NUM; }
363icmpcode		{ yylval.i = 1; return NUM; }
364icmp-echoreply		{ yylval.i = 0; return NUM; }
365icmp-unreach		{ yylval.i = 3; return NUM; }
366icmp-sourcequench	{ yylval.i = 4; return NUM; }
367icmp-redirect		{ yylval.i = 5; return NUM; }
368icmp-echo		{ yylval.i = 8; return NUM; }
369icmp-routeradvert	{ yylval.i = 9; return NUM; }
370icmp-routersolicit	{ yylval.i = 10; return NUM; }
371icmp-timxceed		{ yylval.i = 11; return NUM; }
372icmp-paramprob		{ yylval.i = 12; return NUM; }
373icmp-tstamp		{ yylval.i = 13; return NUM; }
374icmp-tstampreply	{ yylval.i = 14; return NUM; }
375icmp-ireq		{ yylval.i = 15; return NUM; }
376icmp-ireqreply		{ yylval.i = 16; return NUM; }
377icmp-maskreq		{ yylval.i = 17; return NUM; }
378icmp-maskreply		{ yylval.i = 18; return NUM; }
379tcpflags		{ yylval.i = 13; return NUM; }
380tcp-fin			{ yylval.i = 0x01; return NUM; }
381tcp-syn			{ yylval.i = 0x02; return NUM; }
382tcp-rst			{ yylval.i = 0x04; return NUM; }
383tcp-push		{ yylval.i = 0x08; return NUM; }
384tcp-ack			{ yylval.i = 0x10; return NUM; }
385tcp-urg			{ yylval.i = 0x20; return NUM; }
386[A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? {
387			 yylval.s = sdup((char *)yytext); return ID; }
388"\\"[^ !()\n\t]+	{ yylval.s = sdup((char *)yytext + 1); return ID; }
389[^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ {
390			bpf_error("illegal token: %s", yytext); }
391.			{ bpf_error("illegal char '%c'", *yytext); }
392%%
393void
394lex_init(buf)
395	const char *buf;
396{
397#ifdef FLEX_SCANNER
398	in_buffer = yy_scan_string(buf);
399#else
400	in_buffer = buf;
401#endif
402}
403
404/*
405 * Do any cleanup necessary after parsing.
406 */
407void
408lex_cleanup()
409{
410#ifdef FLEX_SCANNER
411	if (in_buffer != NULL)
412		yy_delete_buffer(in_buffer);
413	in_buffer = NULL;
414#endif
415}
416
417/*
418 * Also define a yywrap.  Note that if we're using flex, it will
419 * define a macro to map this identifier to pcap_wrap.
420 */
421int
422yywrap()
423{
424	return 1;
425}
426
427/* Hex digit to integer. */
428static inline int
429xdtoi(c)
430	register int c;
431{
432	if (isdigit(c))
433		return c - '0';
434	else if (islower(c))
435		return c - 'a' + 10;
436	else
437		return c - 'A' + 10;
438}
439
440/*
441 * Convert string to integer.  Just like atoi(), but checks for
442 * preceding 0x or 0 and uses hex or octal instead of decimal.
443 */
444static int
445stoi(s)
446	char *s;
447{
448	int base = 10;
449	int n = 0;
450
451	if (*s == '0') {
452		if (s[1] == 'x' || s[1] == 'X') {
453			s += 2;
454			base = 16;
455		}
456		else {
457			base = 8;
458			s += 1;
459		}
460	}
461	while (*s)
462		n = n * base + xdtoi(*s++);
463
464	return n;
465}
466