parse.y revision 298133 
1/*	$OpenBSD: parse.y,v 1.554 2008/10/17 12:59:53 henning Exp $	*/
2
3/*
4 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
5 * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
6 * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
7 * Copyright (c) 2002,2003 Henning Brauer. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29%{
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: stable/10/sbin/pfctl/parse.y 298133 2016-04-16 22:02:32Z loos $");
32
33#include <sys/types.h>
34#include <sys/socket.h>
35#include <sys/stat.h>
36#ifdef __FreeBSD__
37#include <sys/sysctl.h>
38#endif
39#include <net/if.h>
40#include <netinet/in.h>
41#include <netinet/in_systm.h>
42#include <netinet/ip.h>
43#include <netinet/ip_icmp.h>
44#include <netinet/icmp6.h>
45#include <net/pfvar.h>
46#include <arpa/inet.h>
47#include <altq/altq.h>
48#include <altq/altq_cbq.h>
49#include <altq/altq_codel.h>
50#include <altq/altq_priq.h>
51#include <altq/altq_hfsc.h>
52#include <altq/altq_fairq.h>
53
54#include <stdio.h>
55#include <unistd.h>
56#include <stdlib.h>
57#include <netdb.h>
58#include <stdarg.h>
59#include <errno.h>
60#include <string.h>
61#include <ctype.h>
62#include <math.h>
63#include <err.h>
64#include <limits.h>
65#include <pwd.h>
66#include <grp.h>
67#include <md5.h>
68
69#include "pfctl_parser.h"
70#include "pfctl.h"
71
72static struct pfctl	*pf = NULL;
73static int		 debug = 0;
74static int		 rulestate = 0;
75static u_int16_t	 returnicmpdefault =
76			    (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
77static u_int16_t	 returnicmp6default =
78			    (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
79static int		 blockpolicy = PFRULE_DROP;
80static int		 require_order = 1;
81static int		 default_statelock;
82
83TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
84static struct file {
85	TAILQ_ENTRY(file)	 entry;
86	FILE			*stream;
87	char			*name;
88	int			 lineno;
89	int			 errors;
90} *file;
91struct file	*pushfile(const char *, int);
92int		 popfile(void);
93int		 check_file_secrecy(int, const char *);
94int		 yyparse(void);
95int		 yylex(void);
96int		 yyerror(const char *, ...);
97int		 kw_cmp(const void *, const void *);
98int		 lookup(char *);
99int		 lgetc(int);
100int		 lungetc(int);
101int		 findeol(void);
102
103TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
104struct sym {
105	TAILQ_ENTRY(sym)	 entry;
106	int			 used;
107	int			 persist;
108	char			*nam;
109	char			*val;
110};
111int		 symset(const char *, const char *, int);
112char		*symget(const char *);
113
114int		 atoul(char *, u_long *);
115
116enum {
117	PFCTL_STATE_NONE,
118	PFCTL_STATE_OPTION,
119	PFCTL_STATE_SCRUB,
120	PFCTL_STATE_QUEUE,
121	PFCTL_STATE_NAT,
122	PFCTL_STATE_FILTER
123};
124
125struct node_proto {
126	u_int8_t		 proto;
127	struct node_proto	*next;
128	struct node_proto	*tail;
129};
130
131struct node_port {
132	u_int16_t		 port[2];
133	u_int8_t		 op;
134	struct node_port	*next;
135	struct node_port	*tail;
136};
137
138struct node_uid {
139	uid_t			 uid[2];
140	u_int8_t		 op;
141	struct node_uid		*next;
142	struct node_uid		*tail;
143};
144
145struct node_gid {
146	gid_t			 gid[2];
147	u_int8_t		 op;
148	struct node_gid		*next;
149	struct node_gid		*tail;
150};
151
152struct node_icmp {
153	u_int8_t		 code;
154	u_int8_t		 type;
155	u_int8_t		 proto;
156	struct node_icmp	*next;
157	struct node_icmp	*tail;
158};
159
160enum	{ PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
161	    PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
162	    PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
163	    PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
164	    PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, };
165
166enum	{ PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
167
168struct node_state_opt {
169	int			 type;
170	union {
171		u_int32_t	 max_states;
172		u_int32_t	 max_src_states;
173		u_int32_t	 max_src_conn;
174		struct {
175			u_int32_t	limit;
176			u_int32_t	seconds;
177		}		 max_src_conn_rate;
178		struct {
179			u_int8_t	flush;
180			char		tblname[PF_TABLE_NAME_SIZE];
181		}		 overload;
182		u_int32_t	 max_src_nodes;
183		u_int8_t	 src_track;
184		u_int32_t	 statelock;
185		struct {
186			int		number;
187			u_int32_t	seconds;
188		}		 timeout;
189	}			 data;
190	struct node_state_opt	*next;
191	struct node_state_opt	*tail;
192};
193
194struct peer {
195	struct node_host	*host;
196	struct node_port	*port;
197};
198
199struct node_queue {
200	char			 queue[PF_QNAME_SIZE];
201	char			 parent[PF_QNAME_SIZE];
202	char			 ifname[IFNAMSIZ];
203	int			 scheduler;
204	struct node_queue	*next;
205	struct node_queue	*tail;
206}	*queues = NULL;
207
208struct node_qassign {
209	char		*qname;
210	char		*pqname;
211};
212
213struct filter_opts {
214	int			 marker;
215#define FOM_FLAGS	0x01
216#define FOM_ICMP	0x02
217#define FOM_TOS		0x04
218#define FOM_KEEP	0x08
219#define FOM_SRCTRACK	0x10
220	struct node_uid		*uid;
221	struct node_gid		*gid;
222	struct {
223		u_int8_t	 b1;
224		u_int8_t	 b2;
225		u_int16_t	 w;
226		u_int16_t	 w2;
227	} flags;
228	struct node_icmp	*icmpspec;
229	u_int32_t		 tos;
230	u_int32_t		 prob;
231	struct {
232		int			 action;
233		struct node_state_opt	*options;
234	} keep;
235	int			 fragment;
236	int			 allowopts;
237	char			*label;
238	struct node_qassign	 queues;
239	char			*tag;
240	char			*match_tag;
241	u_int8_t		 match_tag_not;
242	u_int			 rtableid;
243	struct {
244		struct node_host	*addr;
245		u_int16_t		port;
246	}			 divert;
247} filter_opts;
248
249struct antispoof_opts {
250	char			*label;
251	u_int			 rtableid;
252} antispoof_opts;
253
254struct scrub_opts {
255	int			 marker;
256#define SOM_MINTTL	0x01
257#define SOM_MAXMSS	0x02
258#define SOM_FRAGCACHE	0x04
259#define SOM_SETTOS	0x08
260	int			 nodf;
261	int			 minttl;
262	int			 maxmss;
263	int			 settos;
264	int			 fragcache;
265	int			 randomid;
266	int			 reassemble_tcp;
267	char			*match_tag;
268	u_int8_t		 match_tag_not;
269	u_int			 rtableid;
270} scrub_opts;
271
272struct queue_opts {
273	int			marker;
274#define QOM_BWSPEC	0x01
275#define QOM_SCHEDULER	0x02
276#define QOM_PRIORITY	0x04
277#define QOM_TBRSIZE	0x08
278#define QOM_QLIMIT	0x10
279	struct node_queue_bw	queue_bwspec;
280	struct node_queue_opt	scheduler;
281	int			priority;
282	int			tbrsize;
283	int			qlimit;
284} queue_opts;
285
286struct table_opts {
287	int			flags;
288	int			init_addr;
289	struct node_tinithead	init_nodes;
290} table_opts;
291
292struct pool_opts {
293	int			 marker;
294#define POM_TYPE		0x01
295#define POM_STICKYADDRESS	0x02
296	u_int8_t		 opts;
297	int			 type;
298	int			 staticport;
299	struct pf_poolhashkey	*key;
300
301} pool_opts;
302
303struct codel_opts	 codel_opts;
304struct node_hfsc_opts	 hfsc_opts;
305struct node_fairq_opts	 fairq_opts;
306struct node_state_opt	*keep_state_defaults = NULL;
307
308int		 disallow_table(struct node_host *, const char *);
309int		 disallow_urpf_failed(struct node_host *, const char *);
310int		 disallow_alias(struct node_host *, const char *);
311int		 rule_consistent(struct pf_rule *, int);
312int		 filter_consistent(struct pf_rule *, int);
313int		 nat_consistent(struct pf_rule *);
314int		 rdr_consistent(struct pf_rule *);
315int		 process_tabledef(char *, struct table_opts *);
316void		 expand_label_str(char *, size_t, const char *, const char *);
317void		 expand_label_if(const char *, char *, size_t, const char *);
318void		 expand_label_addr(const char *, char *, size_t, u_int8_t,
319		    struct node_host *);
320void		 expand_label_port(const char *, char *, size_t,
321		    struct node_port *);
322void		 expand_label_proto(const char *, char *, size_t, u_int8_t);
323void		 expand_label_nr(const char *, char *, size_t);
324void		 expand_label(char *, size_t, const char *, u_int8_t,
325		    struct node_host *, struct node_port *, struct node_host *,
326		    struct node_port *, u_int8_t);
327void		 expand_rule(struct pf_rule *, struct node_if *,
328		    struct node_host *, struct node_proto *, struct node_os *,
329		    struct node_host *, struct node_port *, struct node_host *,
330		    struct node_port *, struct node_uid *, struct node_gid *,
331		    struct node_icmp *, const char *);
332int		 expand_altq(struct pf_altq *, struct node_if *,
333		    struct node_queue *, struct node_queue_bw bwspec,
334		    struct node_queue_opt *);
335int		 expand_queue(struct pf_altq *, struct node_if *,
336		    struct node_queue *, struct node_queue_bw,
337		    struct node_queue_opt *);
338int		 expand_skip_interface(struct node_if *);
339
340int	 check_rulestate(int);
341int	 getservice(char *);
342int	 rule_label(struct pf_rule *, char *);
343int	 rt_tableid_max(void);
344
345void	 mv_rules(struct pf_ruleset *, struct pf_ruleset *);
346void	 decide_address_family(struct node_host *, sa_family_t *);
347void	 remove_invalid_hosts(struct node_host **, sa_family_t *);
348int	 invalid_redirect(struct node_host *, sa_family_t);
349u_int16_t parseicmpspec(char *, sa_family_t);
350
351TAILQ_HEAD(loadanchorshead, loadanchors)
352    loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
353
354struct loadanchors {
355	TAILQ_ENTRY(loadanchors)	 entries;
356	char				*anchorname;
357	char				*filename;
358};
359
360typedef struct {
361	union {
362		int64_t			 number;
363		double			 probability;
364		int			 i;
365		char			*string;
366		u_int			 rtableid;
367		struct {
368			u_int8_t	 b1;
369			u_int8_t	 b2;
370			u_int16_t	 w;
371			u_int16_t	 w2;
372		}			 b;
373		struct range {
374			int		 a;
375			int		 b;
376			int		 t;
377		}			 range;
378		struct node_if		*interface;
379		struct node_proto	*proto;
380		struct node_icmp	*icmp;
381		struct node_host	*host;
382		struct node_os		*os;
383		struct node_port	*port;
384		struct node_uid		*uid;
385		struct node_gid		*gid;
386		struct node_state_opt	*state_opt;
387		struct peer		 peer;
388		struct {
389			struct peer	 src, dst;
390			struct node_os	*src_os;
391		}			 fromto;
392		struct {
393			struct node_host	*host;
394			u_int8_t		 rt;
395			u_int8_t		 pool_opts;
396			sa_family_t		 af;
397			struct pf_poolhashkey	*key;
398		}			 route;
399		struct redirection {
400			struct node_host	*host;
401			struct range		 rport;
402		}			*redirection;
403		struct {
404			int			 action;
405			struct node_state_opt	*options;
406		}			 keep_state;
407		struct {
408			u_int8_t	 log;
409			u_int8_t	 logif;
410			u_int8_t	 quick;
411		}			 logquick;
412		struct {
413			int		 neg;
414			char		*name;
415		}			 tagged;
416		struct pf_poolhashkey	*hashkey;
417		struct node_queue	*queue;
418		struct node_queue_opt	 queue_options;
419		struct node_queue_bw	 queue_bwspec;
420		struct node_qassign	 qassign;
421		struct filter_opts	 filter_opts;
422		struct antispoof_opts	 antispoof_opts;
423		struct queue_opts	 queue_opts;
424		struct scrub_opts	 scrub_opts;
425		struct table_opts	 table_opts;
426		struct pool_opts	 pool_opts;
427		struct node_hfsc_opts	 hfsc_opts;
428		struct node_fairq_opts	 fairq_opts;
429		struct codel_opts	 codel_opts;
430	} v;
431	int lineno;
432} YYSTYPE;
433
434#define PPORT_RANGE	1
435#define PPORT_STAR	2
436int	parseport(char *, struct range *r, int);
437
438#define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
439	(!((addr).iflags & PFI_AFLAG_NOALIAS) ||		 \
440	!isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
441
442%}
443
444%token	PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
445%token	RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
446%token	ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
447%token	MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
448%token	NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
449%token	REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
450%token	SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
451%token	REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
452%token	ANTISPOOF FOR INCLUDE
453%token	BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY
454%token	ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME
455%token	UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL
456%token	LOAD RULESET_OPTIMIZATION
457%token	STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
458%token	MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY
459%token	TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
460%token	DIVERTTO DIVERTREPLY
461%token	<v.string>		STRING
462%token	<v.number>		NUMBER
463%token	<v.i>			PORTBINARY
464%type	<v.interface>		interface if_list if_item_not if_item
465%type	<v.number>		number icmptype icmp6type uid gid
466%type	<v.number>		tos not yesno
467%type	<v.probability>		probability
468%type	<v.i>			no dir af fragcache optimizer
469%type	<v.i>			sourcetrack flush unaryop statelock
470%type	<v.b>			action nataction natpasslog scrubaction
471%type	<v.b>			flags flag blockspec
472%type	<v.range>		portplain portstar portrange
473%type	<v.hashkey>		hashkey
474%type	<v.proto>		proto proto_list proto_item
475%type	<v.number>		protoval
476%type	<v.icmp>		icmpspec
477%type	<v.icmp>		icmp_list icmp_item
478%type	<v.icmp>		icmp6_list icmp6_item
479%type	<v.number>		reticmpspec reticmp6spec
480%type	<v.fromto>		fromto
481%type	<v.peer>		ipportspec from to
482%type	<v.host>		ipspec toipspec xhost host dynaddr host_list
483%type	<v.host>		redir_host_list redirspec
484%type	<v.host>		route_host route_host_list routespec
485%type	<v.os>			os xos os_list
486%type	<v.port>		portspec port_list port_item
487%type	<v.uid>			uids uid_list uid_item
488%type	<v.gid>			gids gid_list gid_item
489%type	<v.route>		route
490%type	<v.redirection>		redirection redirpool
491%type	<v.string>		label stringall tag anchorname
492%type	<v.string>		string varstring numberstring
493%type	<v.keep_state>		keep
494%type	<v.state_opt>		state_opt_spec state_opt_list state_opt_item
495%type	<v.logquick>		logquick quick log logopts logopt
496%type	<v.interface>		antispoof_ifspc antispoof_iflst antispoof_if
497%type	<v.qassign>		qname
498%type	<v.queue>		qassign qassign_list qassign_item
499%type	<v.queue_options>	scheduler
500%type	<v.number>		cbqflags_list cbqflags_item
501%type	<v.number>		priqflags_list priqflags_item
502%type	<v.hfsc_opts>		hfscopts_list hfscopts_item hfsc_opts
503%type	<v.fairq_opts>		fairqopts_list fairqopts_item fairq_opts
504%type	<v.codel_opts>		codelopts_list codelopts_item codel_opts
505%type	<v.queue_bwspec>	bandwidth
506%type	<v.filter_opts>		filter_opts filter_opt filter_opts_l
507%type	<v.antispoof_opts>	antispoof_opts antispoof_opt antispoof_opts_l
508%type	<v.queue_opts>		queue_opts queue_opt queue_opts_l
509%type	<v.scrub_opts>		scrub_opts scrub_opt scrub_opts_l
510%type	<v.table_opts>		table_opts table_opt table_opts_l
511%type	<v.pool_opts>		pool_opts pool_opt pool_opts_l
512%type	<v.tagged>		tagged
513%type	<v.rtableid>		rtable
514%%
515
516ruleset		: /* empty */
517		| ruleset include '\n'
518		| ruleset '\n'
519		| ruleset option '\n'
520		| ruleset scrubrule '\n'
521		| ruleset natrule '\n'
522		| ruleset binatrule '\n'
523		| ruleset pfrule '\n'
524		| ruleset anchorrule '\n'
525		| ruleset loadrule '\n'
526		| ruleset altqif '\n'
527		| ruleset queuespec '\n'
528		| ruleset varset '\n'
529		| ruleset antispoof '\n'
530		| ruleset tabledef '\n'
531		| '{' fakeanchor '}' '\n';
532		| ruleset error '\n'		{ file->errors++; }
533		;
534
535include		: INCLUDE STRING		{
536			struct file	*nfile;
537
538			if ((nfile = pushfile($2, 0)) == NULL) {
539				yyerror("failed to include file %s", $2);
540				free($2);
541				YYERROR;
542			}
543			free($2);
544
545			file = nfile;
546			lungetc('\n');
547		}
548		;
549
550/*
551 * apply to previouslys specified rule: must be careful to note
552 * what that is: pf or nat or binat or rdr
553 */
554fakeanchor	: fakeanchor '\n'
555		| fakeanchor anchorrule '\n'
556		| fakeanchor binatrule '\n'
557		| fakeanchor natrule '\n'
558		| fakeanchor pfrule '\n'
559		| fakeanchor error '\n'
560		;
561
562optimizer	: string	{
563			if (!strcmp($1, "none"))
564				$$ = 0;
565			else if (!strcmp($1, "basic"))
566				$$ = PF_OPTIMIZE_BASIC;
567			else if (!strcmp($1, "profile"))
568				$$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
569			else {
570				yyerror("unknown ruleset-optimization %s", $1);
571				YYERROR;
572			}
573		}
574		;
575
576option		: SET OPTIMIZATION STRING		{
577			if (check_rulestate(PFCTL_STATE_OPTION)) {
578				free($3);
579				YYERROR;
580			}
581			if (pfctl_set_optimization(pf, $3) != 0) {
582				yyerror("unknown optimization %s", $3);
583				free($3);
584				YYERROR;
585			}
586			free($3);
587		}
588		| SET RULESET_OPTIMIZATION optimizer {
589			if (!(pf->opts & PF_OPT_OPTIMIZE)) {
590				pf->opts |= PF_OPT_OPTIMIZE;
591				pf->optimize = $3;
592			}
593		}
594		| SET TIMEOUT timeout_spec
595		| SET TIMEOUT '{' optnl timeout_list '}'
596		| SET LIMIT limit_spec
597		| SET LIMIT '{' optnl limit_list '}'
598		| SET LOGINTERFACE stringall		{
599			if (check_rulestate(PFCTL_STATE_OPTION)) {
600				free($3);
601				YYERROR;
602			}
603			if (pfctl_set_logif(pf, $3) != 0) {
604				yyerror("error setting loginterface %s", $3);
605				free($3);
606				YYERROR;
607			}
608			free($3);
609		}
610		| SET HOSTID number {
611			if ($3 == 0 || $3 > UINT_MAX) {
612				yyerror("hostid must be non-zero");
613				YYERROR;
614			}
615			if (pfctl_set_hostid(pf, $3) != 0) {
616				yyerror("error setting hostid %08x", $3);
617				YYERROR;
618			}
619		}
620		| SET BLOCKPOLICY DROP	{
621			if (pf->opts & PF_OPT_VERBOSE)
622				printf("set block-policy drop\n");
623			if (check_rulestate(PFCTL_STATE_OPTION))
624				YYERROR;
625			blockpolicy = PFRULE_DROP;
626		}
627		| SET BLOCKPOLICY RETURN {
628			if (pf->opts & PF_OPT_VERBOSE)
629				printf("set block-policy return\n");
630			if (check_rulestate(PFCTL_STATE_OPTION))
631				YYERROR;
632			blockpolicy = PFRULE_RETURN;
633		}
634		| SET REQUIREORDER yesno {
635			if (pf->opts & PF_OPT_VERBOSE)
636				printf("set require-order %s\n",
637				    $3 == 1 ? "yes" : "no");
638			require_order = $3;
639		}
640		| SET FINGERPRINTS STRING {
641			if (pf->opts & PF_OPT_VERBOSE)
642				printf("set fingerprints \"%s\"\n", $3);
643			if (check_rulestate(PFCTL_STATE_OPTION)) {
644				free($3);
645				YYERROR;
646			}
647			if (!pf->anchor->name[0]) {
648				if (pfctl_file_fingerprints(pf->dev,
649				    pf->opts, $3)) {
650					yyerror("error loading "
651					    "fingerprints %s", $3);
652					free($3);
653					YYERROR;
654				}
655			}
656			free($3);
657		}
658		| SET STATEPOLICY statelock {
659			if (pf->opts & PF_OPT_VERBOSE)
660				switch ($3) {
661				case 0:
662					printf("set state-policy floating\n");
663					break;
664				case PFRULE_IFBOUND:
665					printf("set state-policy if-bound\n");
666					break;
667				}
668			default_statelock = $3;
669		}
670		| SET DEBUG STRING {
671			if (check_rulestate(PFCTL_STATE_OPTION)) {
672				free($3);
673				YYERROR;
674			}
675			if (pfctl_set_debug(pf, $3) != 0) {
676				yyerror("error setting debuglevel %s", $3);
677				free($3);
678				YYERROR;
679			}
680			free($3);
681		}
682		| SET SKIP interface {
683			if (expand_skip_interface($3) != 0) {
684				yyerror("error setting skip interface(s)");
685				YYERROR;
686			}
687		}
688		| SET STATEDEFAULTS state_opt_list {
689			if (keep_state_defaults != NULL) {
690				yyerror("cannot redefine state-defaults");
691				YYERROR;
692			}
693			keep_state_defaults = $3;
694		}
695		;
696
697stringall	: STRING	{ $$ = $1; }
698		| ALL		{
699			if (($$ = strdup("all")) == NULL) {
700				err(1, "stringall: strdup");
701			}
702		}
703		;
704
705string		: STRING string				{
706			if (asprintf(&$$, "%s %s", $1, $2) == -1)
707				err(1, "string: asprintf");
708			free($1);
709			free($2);
710		}
711		| STRING
712		;
713
714varstring	: numberstring varstring 		{
715			if (asprintf(&$$, "%s %s", $1, $2) == -1)
716				err(1, "string: asprintf");
717			free($1);
718			free($2);
719		}
720		| numberstring
721		;
722
723numberstring	: NUMBER				{
724			char	*s;
725			if (asprintf(&s, "%lld", (long long)$1) == -1) {
726				yyerror("string: asprintf");
727				YYERROR;
728			}
729			$$ = s;
730		}
731		| STRING
732		;
733
734varset		: STRING '=' varstring	{
735			if (pf->opts & PF_OPT_VERBOSE)
736				printf("%s = \"%s\"\n", $1, $3);
737			if (symset($1, $3, 0) == -1)
738				err(1, "cannot store variable %s", $1);
739			free($1);
740			free($3);
741		}
742		;
743
744anchorname	: STRING			{ $$ = $1; }
745		| /* empty */			{ $$ = NULL; }
746		;
747
748pfa_anchorlist	: /* empty */
749		| pfa_anchorlist '\n'
750		| pfa_anchorlist pfrule '\n'
751		| pfa_anchorlist anchorrule '\n'
752		;
753
754pfa_anchor	: '{'
755		{
756			char ta[PF_ANCHOR_NAME_SIZE];
757			struct pf_ruleset *rs;
758
759			/* steping into a brace anchor */
760			pf->asd++;
761			pf->bn++;
762			pf->brace = 1;
763
764			/* create a holding ruleset in the root */
765			snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
766			rs = pf_find_or_create_ruleset(ta);
767			if (rs == NULL)
768				err(1, "pfa_anchor: pf_find_or_create_ruleset");
769			pf->astack[pf->asd] = rs->anchor;
770			pf->anchor = rs->anchor;
771		} '\n' pfa_anchorlist '}'
772		{
773			pf->alast = pf->anchor;
774			pf->asd--;
775			pf->anchor = pf->astack[pf->asd];
776		}
777		| /* empty */
778		;
779
780anchorrule	: ANCHOR anchorname dir quick interface af proto fromto
781		    filter_opts pfa_anchor
782		{
783			struct pf_rule	r;
784			struct node_proto	*proto;
785
786			if (check_rulestate(PFCTL_STATE_FILTER)) {
787				if ($2)
788					free($2);
789				YYERROR;
790			}
791
792			if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
793				free($2);
794				yyerror("anchor names beginning with '_' "
795				    "are reserved for internal use");
796				YYERROR;
797			}
798
799			memset(&r, 0, sizeof(r));
800			if (pf->astack[pf->asd + 1]) {
801				/* move inline rules into relative location */
802				pf_anchor_setup(&r,
803				    &pf->astack[pf->asd]->ruleset,
804				    $2 ? $2 : pf->alast->name);
805
806				if (r.anchor == NULL)
807					err(1, "anchorrule: unable to "
808					    "create ruleset");
809
810				if (pf->alast != r.anchor) {
811					if (r.anchor->match) {
812						yyerror("inline anchor '%s' "
813						    "already exists",
814						    r.anchor->name);
815						YYERROR;
816					}
817					mv_rules(&pf->alast->ruleset,
818					    &r.anchor->ruleset);
819				}
820				pf_remove_if_empty_ruleset(&pf->alast->ruleset);
821				pf->alast = r.anchor;
822			} else {
823				if (!$2) {
824					yyerror("anchors without explicit "
825					    "rules must specify a name");
826					YYERROR;
827				}
828			}
829			r.direction = $3;
830			r.quick = $4.quick;
831			r.af = $6;
832			r.prob = $9.prob;
833			r.rtableid = $9.rtableid;
834
835			if ($9.tag)
836				if (strlcpy(r.tagname, $9.tag,
837				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
838					yyerror("tag too long, max %u chars",
839					    PF_TAG_NAME_SIZE - 1);
840					YYERROR;
841				}
842			if ($9.match_tag)
843				if (strlcpy(r.match_tagname, $9.match_tag,
844				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
845					yyerror("tag too long, max %u chars",
846					    PF_TAG_NAME_SIZE - 1);
847					YYERROR;
848				}
849			r.match_tag_not = $9.match_tag_not;
850			if (rule_label(&r, $9.label))
851				YYERROR;
852			free($9.label);
853			r.flags = $9.flags.b1;
854			r.flagset = $9.flags.b2;
855			if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
856				yyerror("flags always false");
857				YYERROR;
858			}
859			if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
860				for (proto = $7; proto != NULL &&
861				    proto->proto != IPPROTO_TCP;
862				    proto = proto->next)
863					;	/* nothing */
864				if (proto == NULL && $7 != NULL) {
865					if ($9.flags.b1 || $9.flags.b2)
866						yyerror(
867						    "flags only apply to tcp");
868					if ($8.src_os)
869						yyerror(
870						    "OS fingerprinting only "
871						    "applies to tcp");
872					YYERROR;
873				}
874			}
875
876			r.tos = $9.tos;
877
878			if ($9.keep.action) {
879				yyerror("cannot specify state handling "
880				    "on anchors");
881				YYERROR;
882			}
883
884			if ($9.match_tag)
885				if (strlcpy(r.match_tagname, $9.match_tag,
886				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
887					yyerror("tag too long, max %u chars",
888					    PF_TAG_NAME_SIZE - 1);
889					YYERROR;
890				}
891			r.match_tag_not = $9.match_tag_not;
892
893			decide_address_family($8.src.host, &r.af);
894			decide_address_family($8.dst.host, &r.af);
895
896			expand_rule(&r, $5, NULL, $7, $8.src_os,
897			    $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
898			    $9.uid, $9.gid, $9.icmpspec,
899			    pf->astack[pf->asd + 1] ? pf->alast->name : $2);
900			free($2);
901			pf->astack[pf->asd + 1] = NULL;
902		}
903		| NATANCHOR string interface af proto fromto rtable {
904			struct pf_rule	r;
905
906			if (check_rulestate(PFCTL_STATE_NAT)) {
907				free($2);
908				YYERROR;
909			}
910
911			memset(&r, 0, sizeof(r));
912			r.action = PF_NAT;
913			r.af = $4;
914			r.rtableid = $7;
915
916			decide_address_family($6.src.host, &r.af);
917			decide_address_family($6.dst.host, &r.af);
918
919			expand_rule(&r, $3, NULL, $5, $6.src_os,
920			    $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
921			    0, 0, 0, $2);
922			free($2);
923		}
924		| RDRANCHOR string interface af proto fromto rtable {
925			struct pf_rule	r;
926
927			if (check_rulestate(PFCTL_STATE_NAT)) {
928				free($2);
929				YYERROR;
930			}
931
932			memset(&r, 0, sizeof(r));
933			r.action = PF_RDR;
934			r.af = $4;
935			r.rtableid = $7;
936
937			decide_address_family($6.src.host, &r.af);
938			decide_address_family($6.dst.host, &r.af);
939
940			if ($6.src.port != NULL) {
941				yyerror("source port parameter not supported"
942				    " in rdr-anchor");
943				YYERROR;
944			}
945			if ($6.dst.port != NULL) {
946				if ($6.dst.port->next != NULL) {
947					yyerror("destination port list "
948					    "expansion not supported in "
949					    "rdr-anchor");
950					YYERROR;
951				} else if ($6.dst.port->op != PF_OP_EQ) {
952					yyerror("destination port operators"
953					    " not supported in rdr-anchor");
954					YYERROR;
955				}
956				r.dst.port[0] = $6.dst.port->port[0];
957				r.dst.port[1] = $6.dst.port->port[1];
958				r.dst.port_op = $6.dst.port->op;
959			}
960
961			expand_rule(&r, $3, NULL, $5, $6.src_os,
962			    $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
963			    0, 0, 0, $2);
964			free($2);
965		}
966		| BINATANCHOR string interface af proto fromto rtable {
967			struct pf_rule	r;
968
969			if (check_rulestate(PFCTL_STATE_NAT)) {
970				free($2);
971				YYERROR;
972			}
973
974			memset(&r, 0, sizeof(r));
975			r.action = PF_BINAT;
976			r.af = $4;
977			r.rtableid = $7;
978			if ($5 != NULL) {
979				if ($5->next != NULL) {
980					yyerror("proto list expansion"
981					    " not supported in binat-anchor");
982					YYERROR;
983				}
984				r.proto = $5->proto;
985				free($5);
986			}
987
988			if ($6.src.host != NULL || $6.src.port != NULL ||
989			    $6.dst.host != NULL || $6.dst.port != NULL) {
990				yyerror("fromto parameter not supported"
991				    " in binat-anchor");
992				YYERROR;
993			}
994
995			decide_address_family($6.src.host, &r.af);
996			decide_address_family($6.dst.host, &r.af);
997
998			pfctl_add_rule(pf, &r, $2);
999			free($2);
1000		}
1001		;
1002
1003loadrule	: LOAD ANCHOR string FROM string	{
1004			struct loadanchors	*loadanchor;
1005
1006			if (strlen(pf->anchor->name) + 1 +
1007			    strlen($3) >= MAXPATHLEN) {
1008				yyerror("anchorname %s too long, max %u\n",
1009				    $3, MAXPATHLEN - 1);
1010				free($3);
1011				YYERROR;
1012			}
1013			loadanchor = calloc(1, sizeof(struct loadanchors));
1014			if (loadanchor == NULL)
1015				err(1, "loadrule: calloc");
1016			if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1017			    NULL)
1018				err(1, "loadrule: malloc");
1019			if (pf->anchor->name[0])
1020				snprintf(loadanchor->anchorname, MAXPATHLEN,
1021				    "%s/%s", pf->anchor->name, $3);
1022			else
1023				strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1024			if ((loadanchor->filename = strdup($5)) == NULL)
1025				err(1, "loadrule: strdup");
1026
1027			TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1028			    entries);
1029
1030			free($3);
1031			free($5);
1032		};
1033
1034scrubaction	: no SCRUB {
1035			$$.b2 = $$.w = 0;
1036			if ($1)
1037				$$.b1 = PF_NOSCRUB;
1038			else
1039				$$.b1 = PF_SCRUB;
1040		}
1041		;
1042
1043scrubrule	: scrubaction dir logquick interface af proto fromto scrub_opts
1044		{
1045			struct pf_rule	r;
1046
1047			if (check_rulestate(PFCTL_STATE_SCRUB))
1048				YYERROR;
1049
1050			memset(&r, 0, sizeof(r));
1051
1052			r.action = $1.b1;
1053			r.direction = $2;
1054
1055			r.log = $3.log;
1056			r.logif = $3.logif;
1057			if ($3.quick) {
1058				yyerror("scrub rules do not support 'quick'");
1059				YYERROR;
1060			}
1061
1062			r.af = $5;
1063			if ($8.nodf)
1064				r.rule_flag |= PFRULE_NODF;
1065			if ($8.randomid)
1066				r.rule_flag |= PFRULE_RANDOMID;
1067			if ($8.reassemble_tcp) {
1068				if (r.direction != PF_INOUT) {
1069					yyerror("reassemble tcp rules can not "
1070					    "specify direction");
1071					YYERROR;
1072				}
1073				r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1074			}
1075			if ($8.minttl)
1076				r.min_ttl = $8.minttl;
1077			if ($8.maxmss)
1078				r.max_mss = $8.maxmss;
1079			if ($8.marker & SOM_SETTOS) {
1080				r.rule_flag |= PFRULE_SET_TOS;
1081				r.set_tos = $8.settos;
1082			}
1083			if ($8.fragcache)
1084				r.rule_flag |= $8.fragcache;
1085			if ($8.match_tag)
1086				if (strlcpy(r.match_tagname, $8.match_tag,
1087				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1088					yyerror("tag too long, max %u chars",
1089					    PF_TAG_NAME_SIZE - 1);
1090					YYERROR;
1091				}
1092			r.match_tag_not = $8.match_tag_not;
1093			r.rtableid = $8.rtableid;
1094
1095			expand_rule(&r, $4, NULL, $6, $7.src_os,
1096			    $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
1097			    NULL, NULL, NULL, "");
1098		}
1099		;
1100
1101scrub_opts	:	{
1102				bzero(&scrub_opts, sizeof scrub_opts);
1103				scrub_opts.rtableid = -1;
1104			}
1105		    scrub_opts_l
1106			{ $$ = scrub_opts; }
1107		| /* empty */ {
1108			bzero(&scrub_opts, sizeof scrub_opts);
1109			scrub_opts.rtableid = -1;
1110			$$ = scrub_opts;
1111		}
1112		;
1113
1114scrub_opts_l	: scrub_opts_l scrub_opt
1115		| scrub_opt
1116		;
1117
1118scrub_opt	: NODF	{
1119			if (scrub_opts.nodf) {
1120				yyerror("no-df cannot be respecified");
1121				YYERROR;
1122			}
1123			scrub_opts.nodf = 1;
1124		}
1125		| MINTTL NUMBER {
1126			if (scrub_opts.marker & SOM_MINTTL) {
1127				yyerror("min-ttl cannot be respecified");
1128				YYERROR;
1129			}
1130			if ($2 < 0 || $2 > 255) {
1131				yyerror("illegal min-ttl value %d", $2);
1132				YYERROR;
1133			}
1134			scrub_opts.marker |= SOM_MINTTL;
1135			scrub_opts.minttl = $2;
1136		}
1137		| MAXMSS NUMBER {
1138			if (scrub_opts.marker & SOM_MAXMSS) {
1139				yyerror("max-mss cannot be respecified");
1140				YYERROR;
1141			}
1142			if ($2 < 0 || $2 > 65535) {
1143				yyerror("illegal max-mss value %d", $2);
1144				YYERROR;
1145			}
1146			scrub_opts.marker |= SOM_MAXMSS;
1147			scrub_opts.maxmss = $2;
1148		}
1149		| SETTOS tos {
1150			if (scrub_opts.marker & SOM_SETTOS) {
1151				yyerror("set-tos cannot be respecified");
1152				YYERROR;
1153			}
1154			scrub_opts.marker |= SOM_SETTOS;
1155			scrub_opts.settos = $2;
1156		}
1157		| fragcache {
1158			if (scrub_opts.marker & SOM_FRAGCACHE) {
1159				yyerror("fragcache cannot be respecified");
1160				YYERROR;
1161			}
1162			scrub_opts.marker |= SOM_FRAGCACHE;
1163			scrub_opts.fragcache = $1;
1164		}
1165		| REASSEMBLE STRING {
1166			if (strcasecmp($2, "tcp") != 0) {
1167				yyerror("scrub reassemble supports only tcp, "
1168				    "not '%s'", $2);
1169				free($2);
1170				YYERROR;
1171			}
1172			free($2);
1173			if (scrub_opts.reassemble_tcp) {
1174				yyerror("reassemble tcp cannot be respecified");
1175				YYERROR;
1176			}
1177			scrub_opts.reassemble_tcp = 1;
1178		}
1179		| RANDOMID {
1180			if (scrub_opts.randomid) {
1181				yyerror("random-id cannot be respecified");
1182				YYERROR;
1183			}
1184			scrub_opts.randomid = 1;
1185		}
1186		| RTABLE NUMBER				{
1187			if ($2 < 0 || $2 > rt_tableid_max()) {
1188				yyerror("invalid rtable id");
1189				YYERROR;
1190			}
1191			scrub_opts.rtableid = $2;
1192		}
1193		| not TAGGED string			{
1194			scrub_opts.match_tag = $3;
1195			scrub_opts.match_tag_not = $1;
1196		}
1197		;
1198
1199fragcache	: FRAGMENT REASSEMBLE	{ $$ = 0; /* default */ }
1200		| FRAGMENT FRAGCROP	{ $$ = PFRULE_FRAGCROP; }
1201		| FRAGMENT FRAGDROP	{ $$ = PFRULE_FRAGDROP; }
1202		;
1203
1204antispoof	: ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1205			struct pf_rule		 r;
1206			struct node_host	*h = NULL, *hh;
1207			struct node_if		*i, *j;
1208
1209			if (check_rulestate(PFCTL_STATE_FILTER))
1210				YYERROR;
1211
1212			for (i = $3; i; i = i->next) {
1213				bzero(&r, sizeof(r));
1214
1215				r.action = PF_DROP;
1216				r.direction = PF_IN;
1217				r.log = $2.log;
1218				r.logif = $2.logif;
1219				r.quick = $2.quick;
1220				r.af = $4;
1221				if (rule_label(&r, $5.label))
1222					YYERROR;
1223				r.rtableid = $5.rtableid;
1224				j = calloc(1, sizeof(struct node_if));
1225				if (j == NULL)
1226					err(1, "antispoof: calloc");
1227				if (strlcpy(j->ifname, i->ifname,
1228				    sizeof(j->ifname)) >= sizeof(j->ifname)) {
1229					free(j);
1230					yyerror("interface name too long");
1231					YYERROR;
1232				}
1233				j->not = 1;
1234				if (i->dynamic) {
1235					h = calloc(1, sizeof(*h));
1236					if (h == NULL)
1237						err(1, "address: calloc");
1238					h->addr.type = PF_ADDR_DYNIFTL;
1239					set_ipmask(h, 128);
1240					if (strlcpy(h->addr.v.ifname, i->ifname,
1241					    sizeof(h->addr.v.ifname)) >=
1242					    sizeof(h->addr.v.ifname)) {
1243						free(h);
1244						yyerror(
1245						    "interface name too long");
1246						YYERROR;
1247					}
1248					hh = malloc(sizeof(*hh));
1249					if (hh == NULL)
1250						 err(1, "address: malloc");
1251					bcopy(h, hh, sizeof(*hh));
1252					h->addr.iflags = PFI_AFLAG_NETWORK;
1253				} else {
1254					h = ifa_lookup(j->ifname,
1255					    PFI_AFLAG_NETWORK);
1256					hh = NULL;
1257				}
1258
1259				if (h != NULL)
1260					expand_rule(&r, j, NULL, NULL, NULL, h,
1261					    NULL, NULL, NULL, NULL, NULL,
1262					    NULL, "");
1263
1264				if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1265					bzero(&r, sizeof(r));
1266
1267					r.action = PF_DROP;
1268					r.direction = PF_IN;
1269					r.log = $2.log;
1270					r.logif = $2.logif;
1271					r.quick = $2.quick;
1272					r.af = $4;
1273					if (rule_label(&r, $5.label))
1274						YYERROR;
1275					r.rtableid = $5.rtableid;
1276					if (hh != NULL)
1277						h = hh;
1278					else
1279						h = ifa_lookup(i->ifname, 0);
1280					if (h != NULL)
1281						expand_rule(&r, NULL, NULL,
1282						    NULL, NULL, h, NULL, NULL,
1283						    NULL, NULL, NULL, NULL, "");
1284				} else
1285					free(hh);
1286			}
1287			free($5.label);
1288		}
1289		;
1290
1291antispoof_ifspc	: FOR antispoof_if			{ $$ = $2; }
1292		| FOR '{' optnl antispoof_iflst '}'	{ $$ = $4; }
1293		;
1294
1295antispoof_iflst	: antispoof_if optnl			{ $$ = $1; }
1296		| antispoof_iflst comma antispoof_if optnl {
1297			$1->tail->next = $3;
1298			$1->tail = $3;
1299			$$ = $1;
1300		}
1301		;
1302
1303antispoof_if	: if_item				{ $$ = $1; }
1304		| '(' if_item ')'			{
1305			$2->dynamic = 1;
1306			$$ = $2;
1307		}
1308		;
1309
1310antispoof_opts	:	{
1311				bzero(&antispoof_opts, sizeof antispoof_opts);
1312				antispoof_opts.rtableid = -1;
1313			}
1314		    antispoof_opts_l
1315			{ $$ = antispoof_opts; }
1316		| /* empty */	{
1317			bzero(&antispoof_opts, sizeof antispoof_opts);
1318			antispoof_opts.rtableid = -1;
1319			$$ = antispoof_opts;
1320		}
1321		;
1322
1323antispoof_opts_l	: antispoof_opts_l antispoof_opt
1324			| antispoof_opt
1325			;
1326
1327antispoof_opt	: label	{
1328			if (antispoof_opts.label) {
1329				yyerror("label cannot be redefined");
1330				YYERROR;
1331			}
1332			antispoof_opts.label = $1;
1333		}
1334		| RTABLE NUMBER				{
1335			if ($2 < 0 || $2 > rt_tableid_max()) {
1336				yyerror("invalid rtable id");
1337				YYERROR;
1338			}
1339			antispoof_opts.rtableid = $2;
1340		}
1341		;
1342
1343not		: '!'		{ $$ = 1; }
1344		| /* empty */	{ $$ = 0; }
1345		;
1346
1347tabledef	: TABLE '<' STRING '>' table_opts {
1348			struct node_host	 *h, *nh;
1349			struct node_tinit	 *ti, *nti;
1350
1351			if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1352				yyerror("table name too long, max %d chars",
1353				    PF_TABLE_NAME_SIZE - 1);
1354				free($3);
1355				YYERROR;
1356			}
1357			if (pf->loadopt & PFCTL_FLAG_TABLE)
1358				if (process_tabledef($3, &$5)) {
1359					free($3);
1360					YYERROR;
1361				}
1362			free($3);
1363			for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1364			    ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1365				if (ti->file)
1366					free(ti->file);
1367				for (h = ti->host; h != NULL; h = nh) {
1368					nh = h->next;
1369					free(h);
1370				}
1371				nti = SIMPLEQ_NEXT(ti, entries);
1372				free(ti);
1373			}
1374		}
1375		;
1376
1377table_opts	:	{
1378			bzero(&table_opts, sizeof table_opts);
1379			SIMPLEQ_INIT(&table_opts.init_nodes);
1380		}
1381		    table_opts_l
1382			{ $$ = table_opts; }
1383		| /* empty */
1384			{
1385			bzero(&table_opts, sizeof table_opts);
1386			SIMPLEQ_INIT(&table_opts.init_nodes);
1387			$$ = table_opts;
1388		}
1389		;
1390
1391table_opts_l	: table_opts_l table_opt
1392		| table_opt
1393		;
1394
1395table_opt	: STRING		{
1396			if (!strcmp($1, "const"))
1397				table_opts.flags |= PFR_TFLAG_CONST;
1398			else if (!strcmp($1, "persist"))
1399				table_opts.flags |= PFR_TFLAG_PERSIST;
1400			else if (!strcmp($1, "counters"))
1401				table_opts.flags |= PFR_TFLAG_COUNTERS;
1402			else {
1403				yyerror("invalid table option '%s'", $1);
1404				free($1);
1405				YYERROR;
1406			}
1407			free($1);
1408		}
1409		| '{' optnl '}'		{ table_opts.init_addr = 1; }
1410		| '{' optnl host_list '}'	{
1411			struct node_host	*n;
1412			struct node_tinit	*ti;
1413
1414			for (n = $3; n != NULL; n = n->next) {
1415				switch (n->addr.type) {
1416				case PF_ADDR_ADDRMASK:
1417					continue; /* ok */
1418				case PF_ADDR_RANGE:
1419					yyerror("address ranges are not "
1420					    "permitted inside tables");
1421					break;
1422				case PF_ADDR_DYNIFTL:
1423					yyerror("dynamic addresses are not "
1424					    "permitted inside tables");
1425					break;
1426				case PF_ADDR_TABLE:
1427					yyerror("tables cannot contain tables");
1428					break;
1429				case PF_ADDR_NOROUTE:
1430					yyerror("\"no-route\" is not permitted "
1431					    "inside tables");
1432					break;
1433				case PF_ADDR_URPFFAILED:
1434					yyerror("\"urpf-failed\" is not "
1435					    "permitted inside tables");
1436					break;
1437				default:
1438					yyerror("unknown address type %d",
1439					    n->addr.type);
1440				}
1441				YYERROR;
1442			}
1443			if (!(ti = calloc(1, sizeof(*ti))))
1444				err(1, "table_opt: calloc");
1445			ti->host = $3;
1446			SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1447			    entries);
1448			table_opts.init_addr = 1;
1449		}
1450		| FILENAME STRING	{
1451			struct node_tinit	*ti;
1452
1453			if (!(ti = calloc(1, sizeof(*ti))))
1454				err(1, "table_opt: calloc");
1455			ti->file = $2;
1456			SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1457			    entries);
1458			table_opts.init_addr = 1;
1459		}
1460		;
1461
1462altqif		: ALTQ interface queue_opts QUEUE qassign {
1463			struct pf_altq	a;
1464
1465			if (check_rulestate(PFCTL_STATE_QUEUE))
1466				YYERROR;
1467
1468			memset(&a, 0, sizeof(a));
1469			if ($3.scheduler.qtype == ALTQT_NONE) {
1470				yyerror("no scheduler specified!");
1471				YYERROR;
1472			}
1473			a.scheduler = $3.scheduler.qtype;
1474			a.qlimit = $3.qlimit;
1475			a.tbrsize = $3.tbrsize;
1476			if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) {
1477				yyerror("no child queues specified");
1478				YYERROR;
1479			}
1480			if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1481			    &$3.scheduler))
1482				YYERROR;
1483		}
1484		;
1485
1486queuespec	: QUEUE STRING interface queue_opts qassign {
1487			struct pf_altq	a;
1488
1489			if (check_rulestate(PFCTL_STATE_QUEUE)) {
1490				free($2);
1491				YYERROR;
1492			}
1493
1494			memset(&a, 0, sizeof(a));
1495
1496			if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1497			    sizeof(a.qname)) {
1498				yyerror("queue name too long (max "
1499				    "%d chars)", PF_QNAME_SIZE-1);
1500				free($2);
1501				YYERROR;
1502			}
1503			free($2);
1504			if ($4.tbrsize) {
1505				yyerror("cannot specify tbrsize for queue");
1506				YYERROR;
1507			}
1508			if ($4.priority > 255) {
1509				yyerror("priority out of range: max 255");
1510				YYERROR;
1511			}
1512			a.priority = $4.priority;
1513			a.qlimit = $4.qlimit;
1514			a.scheduler = $4.scheduler.qtype;
1515			if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1516			    &$4.scheduler)) {
1517				yyerror("errors in queue definition");
1518				YYERROR;
1519			}
1520		}
1521		;
1522
1523queue_opts	:	{
1524			bzero(&queue_opts, sizeof queue_opts);
1525			queue_opts.priority = DEFAULT_PRIORITY;
1526			queue_opts.qlimit = DEFAULT_QLIMIT;
1527			queue_opts.scheduler.qtype = ALTQT_NONE;
1528			queue_opts.queue_bwspec.bw_percent = 100;
1529		}
1530		    queue_opts_l
1531			{ $$ = queue_opts; }
1532		| /* empty */ {
1533			bzero(&queue_opts, sizeof queue_opts);
1534			queue_opts.priority = DEFAULT_PRIORITY;
1535			queue_opts.qlimit = DEFAULT_QLIMIT;
1536			queue_opts.scheduler.qtype = ALTQT_NONE;
1537			queue_opts.queue_bwspec.bw_percent = 100;
1538			$$ = queue_opts;
1539		}
1540		;
1541
1542queue_opts_l	: queue_opts_l queue_opt
1543		| queue_opt
1544		;
1545
1546queue_opt	: BANDWIDTH bandwidth	{
1547			if (queue_opts.marker & QOM_BWSPEC) {
1548				yyerror("bandwidth cannot be respecified");
1549				YYERROR;
1550			}
1551			queue_opts.marker |= QOM_BWSPEC;
1552			queue_opts.queue_bwspec = $2;
1553		}
1554		| PRIORITY NUMBER	{
1555			if (queue_opts.marker & QOM_PRIORITY) {
1556				yyerror("priority cannot be respecified");
1557				YYERROR;
1558			}
1559			if ($2 < 0 || $2 > 255) {
1560				yyerror("priority out of range: max 255");
1561				YYERROR;
1562			}
1563			queue_opts.marker |= QOM_PRIORITY;
1564			queue_opts.priority = $2;
1565		}
1566		| QLIMIT NUMBER	{
1567			if (queue_opts.marker & QOM_QLIMIT) {
1568				yyerror("qlimit cannot be respecified");
1569				YYERROR;
1570			}
1571			if ($2 < 0 || $2 > 65535) {
1572				yyerror("qlimit out of range: max 65535");
1573				YYERROR;
1574			}
1575			queue_opts.marker |= QOM_QLIMIT;
1576			queue_opts.qlimit = $2;
1577		}
1578		| scheduler	{
1579			if (queue_opts.marker & QOM_SCHEDULER) {
1580				yyerror("scheduler cannot be respecified");
1581				YYERROR;
1582			}
1583			queue_opts.marker |= QOM_SCHEDULER;
1584			queue_opts.scheduler = $1;
1585		}
1586		| TBRSIZE NUMBER	{
1587			if (queue_opts.marker & QOM_TBRSIZE) {
1588				yyerror("tbrsize cannot be respecified");
1589				YYERROR;
1590			}
1591			if ($2 < 0 || $2 > 65535) {
1592				yyerror("tbrsize too big: max 65535");
1593				YYERROR;
1594			}
1595			queue_opts.marker |= QOM_TBRSIZE;
1596			queue_opts.tbrsize = $2;
1597		}
1598		;
1599
1600bandwidth	: STRING {
1601			double	 bps;
1602			char	*cp;
1603
1604			$$.bw_percent = 0;
1605
1606			bps = strtod($1, &cp);
1607			if (cp != NULL) {
1608				if (!strcmp(cp, "b"))
1609					; /* nothing */
1610				else if (!strcmp(cp, "Kb"))
1611					bps *= 1000;
1612				else if (!strcmp(cp, "Mb"))
1613					bps *= 1000 * 1000;
1614				else if (!strcmp(cp, "Gb"))
1615					bps *= 1000 * 1000 * 1000;
1616				else if (!strcmp(cp, "%")) {
1617					if (bps < 0 || bps > 100) {
1618						yyerror("bandwidth spec "
1619						    "out of range");
1620						free($1);
1621						YYERROR;
1622					}
1623					$$.bw_percent = bps;
1624					bps = 0;
1625				} else {
1626					yyerror("unknown unit %s", cp);
1627					free($1);
1628					YYERROR;
1629				}
1630			}
1631			free($1);
1632			$$.bw_absolute = (u_int32_t)bps;
1633		}
1634		| NUMBER {
1635			if ($1 < 0 || $1 > UINT_MAX) {
1636				yyerror("bandwidth number too big");
1637				YYERROR;
1638			}
1639			$$.bw_percent = 0;
1640			$$.bw_absolute = $1;
1641		}
1642		;
1643
1644scheduler	: CBQ				{
1645			$$.qtype = ALTQT_CBQ;
1646			$$.data.cbq_opts.flags = 0;
1647		}
1648		| CBQ '(' cbqflags_list ')'	{
1649			$$.qtype = ALTQT_CBQ;
1650			$$.data.cbq_opts.flags = $3;
1651		}
1652		| PRIQ				{
1653			$$.qtype = ALTQT_PRIQ;
1654			$$.data.priq_opts.flags = 0;
1655		}
1656		| PRIQ '(' priqflags_list ')'	{
1657			$$.qtype = ALTQT_PRIQ;
1658			$$.data.priq_opts.flags = $3;
1659		}
1660		| HFSC				{
1661			$$.qtype = ALTQT_HFSC;
1662			bzero(&$$.data.hfsc_opts,
1663			    sizeof(struct node_hfsc_opts));
1664		}
1665		| HFSC '(' hfsc_opts ')'	{
1666			$$.qtype = ALTQT_HFSC;
1667			$$.data.hfsc_opts = $3;
1668		}
1669		| FAIRQ				{
1670			$$.qtype = ALTQT_FAIRQ;
1671			bzero(&$$.data.fairq_opts,
1672				sizeof(struct node_fairq_opts));
1673		}
1674		| FAIRQ '(' fairq_opts ')'      {
1675			$$.qtype = ALTQT_FAIRQ;
1676			$$.data.fairq_opts = $3;
1677		}
1678		| CODEL				{
1679			$$.qtype = ALTQT_CODEL;
1680			bzero(&$$.data.codel_opts,
1681				sizeof(struct codel_opts));
1682		}
1683		| CODEL '(' codel_opts ')'	{
1684			$$.qtype = ALTQT_CODEL;
1685			$$.data.codel_opts = $3;
1686		}
1687		;
1688
1689cbqflags_list	: cbqflags_item				{ $$ |= $1; }
1690		| cbqflags_list comma cbqflags_item	{ $$ |= $3; }
1691		;
1692
1693cbqflags_item	: STRING	{
1694			if (!strcmp($1, "default"))
1695				$$ = CBQCLF_DEFCLASS;
1696			else if (!strcmp($1, "borrow"))
1697				$$ = CBQCLF_BORROW;
1698			else if (!strcmp($1, "red"))
1699				$$ = CBQCLF_RED;
1700			else if (!strcmp($1, "ecn"))
1701				$$ = CBQCLF_RED|CBQCLF_ECN;
1702			else if (!strcmp($1, "rio"))
1703				$$ = CBQCLF_RIO;
1704			else if (!strcmp($1, "codel"))
1705				$$ = CBQCLF_CODEL;
1706			else {
1707				yyerror("unknown cbq flag \"%s\"", $1);
1708				free($1);
1709				YYERROR;
1710			}
1711			free($1);
1712		}
1713		;
1714
1715priqflags_list	: priqflags_item			{ $$ |= $1; }
1716		| priqflags_list comma priqflags_item	{ $$ |= $3; }
1717		;
1718
1719priqflags_item	: STRING	{
1720			if (!strcmp($1, "default"))
1721				$$ = PRCF_DEFAULTCLASS;
1722			else if (!strcmp($1, "red"))
1723				$$ = PRCF_RED;
1724			else if (!strcmp($1, "ecn"))
1725				$$ = PRCF_RED|PRCF_ECN;
1726			else if (!strcmp($1, "rio"))
1727				$$ = PRCF_RIO;
1728			else if (!strcmp($1, "codel"))
1729				$$ = PRCF_CODEL;
1730			else {
1731				yyerror("unknown priq flag \"%s\"", $1);
1732				free($1);
1733				YYERROR;
1734			}
1735			free($1);
1736		}
1737		;
1738
1739hfsc_opts	:	{
1740				bzero(&hfsc_opts,
1741				    sizeof(struct node_hfsc_opts));
1742			}
1743		    hfscopts_list				{
1744			$$ = hfsc_opts;
1745		}
1746		;
1747
1748hfscopts_list	: hfscopts_item
1749		| hfscopts_list comma hfscopts_item
1750		;
1751
1752hfscopts_item	: LINKSHARE bandwidth				{
1753			if (hfsc_opts.linkshare.used) {
1754				yyerror("linkshare already specified");
1755				YYERROR;
1756			}
1757			hfsc_opts.linkshare.m2 = $2;
1758			hfsc_opts.linkshare.used = 1;
1759		}
1760		| LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1761		    {
1762			if ($5 < 0 || $5 > INT_MAX) {
1763				yyerror("timing in curve out of range");
1764				YYERROR;
1765			}
1766			if (hfsc_opts.linkshare.used) {
1767				yyerror("linkshare already specified");
1768				YYERROR;
1769			}
1770			hfsc_opts.linkshare.m1 = $3;
1771			hfsc_opts.linkshare.d = $5;
1772			hfsc_opts.linkshare.m2 = $7;
1773			hfsc_opts.linkshare.used = 1;
1774		}
1775		| REALTIME bandwidth				{
1776			if (hfsc_opts.realtime.used) {
1777				yyerror("realtime already specified");
1778				YYERROR;
1779			}
1780			hfsc_opts.realtime.m2 = $2;
1781			hfsc_opts.realtime.used = 1;
1782		}
1783		| REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1784		    {
1785			if ($5 < 0 || $5 > INT_MAX) {
1786				yyerror("timing in curve out of range");
1787				YYERROR;
1788			}
1789			if (hfsc_opts.realtime.used) {
1790				yyerror("realtime already specified");
1791				YYERROR;
1792			}
1793			hfsc_opts.realtime.m1 = $3;
1794			hfsc_opts.realtime.d = $5;
1795			hfsc_opts.realtime.m2 = $7;
1796			hfsc_opts.realtime.used = 1;
1797		}
1798		| UPPERLIMIT bandwidth				{
1799			if (hfsc_opts.upperlimit.used) {
1800				yyerror("upperlimit already specified");
1801				YYERROR;
1802			}
1803			hfsc_opts.upperlimit.m2 = $2;
1804			hfsc_opts.upperlimit.used = 1;
1805		}
1806		| UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1807		    {
1808			if ($5 < 0 || $5 > INT_MAX) {
1809				yyerror("timing in curve out of range");
1810				YYERROR;
1811			}
1812			if (hfsc_opts.upperlimit.used) {
1813				yyerror("upperlimit already specified");
1814				YYERROR;
1815			}
1816			hfsc_opts.upperlimit.m1 = $3;
1817			hfsc_opts.upperlimit.d = $5;
1818			hfsc_opts.upperlimit.m2 = $7;
1819			hfsc_opts.upperlimit.used = 1;
1820		}
1821		| STRING	{
1822			if (!strcmp($1, "default"))
1823				hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1824			else if (!strcmp($1, "red"))
1825				hfsc_opts.flags |= HFCF_RED;
1826			else if (!strcmp($1, "ecn"))
1827				hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1828			else if (!strcmp($1, "rio"))
1829				hfsc_opts.flags |= HFCF_RIO;
1830			else if (!strcmp($1, "codel"))
1831				hfsc_opts.flags |= HFCF_CODEL;
1832			else {
1833				yyerror("unknown hfsc flag \"%s\"", $1);
1834				free($1);
1835				YYERROR;
1836			}
1837			free($1);
1838		}
1839		;
1840
1841fairq_opts	:	{
1842				bzero(&fairq_opts,
1843				    sizeof(struct node_fairq_opts));
1844			}
1845		    fairqopts_list				{
1846			$$ = fairq_opts;
1847		}
1848		;
1849
1850fairqopts_list	: fairqopts_item
1851		| fairqopts_list comma fairqopts_item
1852		;
1853
1854fairqopts_item	: LINKSHARE bandwidth				{
1855			if (fairq_opts.linkshare.used) {
1856				yyerror("linkshare already specified");
1857				YYERROR;
1858			}
1859			fairq_opts.linkshare.m2 = $2;
1860			fairq_opts.linkshare.used = 1;
1861		}
1862		| LINKSHARE '(' bandwidth number bandwidth ')'	{
1863			if (fairq_opts.linkshare.used) {
1864				yyerror("linkshare already specified");
1865				YYERROR;
1866			}
1867			fairq_opts.linkshare.m1 = $3;
1868			fairq_opts.linkshare.d = $4;
1869			fairq_opts.linkshare.m2 = $5;
1870			fairq_opts.linkshare.used = 1;
1871		}
1872		| HOGS bandwidth {
1873			fairq_opts.hogs_bw = $2;
1874		}
1875		| BUCKETS number {
1876			fairq_opts.nbuckets = $2;
1877		}
1878		| STRING	{
1879			if (!strcmp($1, "default"))
1880				fairq_opts.flags |= FARF_DEFAULTCLASS;
1881			else if (!strcmp($1, "red"))
1882				fairq_opts.flags |= FARF_RED;
1883			else if (!strcmp($1, "ecn"))
1884				fairq_opts.flags |= FARF_RED|FARF_ECN;
1885			else if (!strcmp($1, "rio"))
1886				fairq_opts.flags |= FARF_RIO;
1887			else if (!strcmp($1, "codel"))
1888				fairq_opts.flags |= FARF_CODEL;
1889			else {
1890				yyerror("unknown fairq flag \"%s\"", $1);
1891				free($1);
1892				YYERROR;
1893			}
1894			free($1);
1895		}
1896		;
1897
1898codel_opts	:	{
1899				bzero(&codel_opts,
1900				    sizeof(struct codel_opts));
1901			}
1902		    codelopts_list				{
1903			$$ = codel_opts;
1904		}
1905		;
1906
1907codelopts_list	: codelopts_item
1908		| codelopts_list comma codelopts_item
1909		;
1910
1911codelopts_item	: INTERVAL number				{
1912			if (codel_opts.interval) {
1913				yyerror("interval already specified");
1914				YYERROR;
1915			}
1916			codel_opts.interval = $2;
1917		}
1918		| TARGET number					{
1919			if (codel_opts.target) {
1920				yyerror("target already specified");
1921				YYERROR;
1922			}
1923			codel_opts.target = $2;
1924		}
1925		| STRING					{
1926			if (!strcmp($1, "ecn"))
1927				codel_opts.ecn = 1;
1928			else {
1929				yyerror("unknown codel option \"%s\"", $1);
1930				free($1);
1931				YYERROR;
1932			}
1933			free($1);
1934		}
1935		;
1936
1937qassign		: /* empty */		{ $$ = NULL; }
1938		| qassign_item		{ $$ = $1; }
1939		| '{' optnl qassign_list '}'	{ $$ = $3; }
1940		;
1941
1942qassign_list	: qassign_item optnl		{ $$ = $1; }
1943		| qassign_list comma qassign_item optnl	{
1944			$1->tail->next = $3;
1945			$1->tail = $3;
1946			$$ = $1;
1947		}
1948		;
1949
1950qassign_item	: STRING			{
1951			$$ = calloc(1, sizeof(struct node_queue));
1952			if ($$ == NULL)
1953				err(1, "qassign_item: calloc");
1954			if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
1955			    sizeof($$->queue)) {
1956				yyerror("queue name '%s' too long (max "
1957				    "%d chars)", $1, sizeof($$->queue)-1);
1958				free($1);
1959				free($$);
1960				YYERROR;
1961			}
1962			free($1);
1963			$$->next = NULL;
1964			$$->tail = $$;
1965		}
1966		;
1967
1968pfrule		: action dir logquick interface route af proto fromto
1969		    filter_opts
1970		{
1971			struct pf_rule		 r;
1972			struct node_state_opt	*o;
1973			struct node_proto	*proto;
1974			int			 srctrack = 0;
1975			int			 statelock = 0;
1976			int			 adaptive = 0;
1977			int			 defaults = 0;
1978
1979			if (check_rulestate(PFCTL_STATE_FILTER))
1980				YYERROR;
1981
1982			memset(&r, 0, sizeof(r));
1983
1984			r.action = $1.b1;
1985			switch ($1.b2) {
1986			case PFRULE_RETURNRST:
1987				r.rule_flag |= PFRULE_RETURNRST;
1988				r.return_ttl = $1.w;
1989				break;
1990			case PFRULE_RETURNICMP:
1991				r.rule_flag |= PFRULE_RETURNICMP;
1992				r.return_icmp = $1.w;
1993				r.return_icmp6 = $1.w2;
1994				break;
1995			case PFRULE_RETURN:
1996				r.rule_flag |= PFRULE_RETURN;
1997				r.return_icmp = $1.w;
1998				r.return_icmp6 = $1.w2;
1999				break;
2000			}
2001			r.direction = $2;
2002			r.log = $3.log;
2003			r.logif = $3.logif;
2004			r.quick = $3.quick;
2005			r.prob = $9.prob;
2006			r.rtableid = $9.rtableid;
2007
2008			r.af = $6;
2009			if ($9.tag)
2010				if (strlcpy(r.tagname, $9.tag,
2011				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2012					yyerror("tag too long, max %u chars",
2013					    PF_TAG_NAME_SIZE - 1);
2014					YYERROR;
2015				}
2016			if ($9.match_tag)
2017				if (strlcpy(r.match_tagname, $9.match_tag,
2018				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2019					yyerror("tag too long, max %u chars",
2020					    PF_TAG_NAME_SIZE - 1);
2021					YYERROR;
2022				}
2023			r.match_tag_not = $9.match_tag_not;
2024			if (rule_label(&r, $9.label))
2025				YYERROR;
2026			free($9.label);
2027			r.flags = $9.flags.b1;
2028			r.flagset = $9.flags.b2;
2029			if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
2030				yyerror("flags always false");
2031				YYERROR;
2032			}
2033			if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
2034				for (proto = $7; proto != NULL &&
2035				    proto->proto != IPPROTO_TCP;
2036				    proto = proto->next)
2037					;	/* nothing */
2038				if (proto == NULL && $7 != NULL) {
2039					if ($9.flags.b1 || $9.flags.b2)
2040						yyerror(
2041						    "flags only apply to tcp");
2042					if ($8.src_os)
2043						yyerror(
2044						    "OS fingerprinting only "
2045						    "apply to tcp");
2046					YYERROR;
2047				}
2048#if 0
2049				if (($9.flags.b1 & parse_flags("S")) == 0 &&
2050				    $8.src_os) {
2051					yyerror("OS fingerprinting requires "
2052					    "the SYN TCP flag (flags S/SA)");
2053					YYERROR;
2054				}
2055#endif
2056			}
2057
2058			r.tos = $9.tos;
2059			r.keep_state = $9.keep.action;
2060			o = $9.keep.options;
2061
2062			/* 'keep state' by default on pass rules. */
2063			if (!r.keep_state && !r.action &&
2064			    !($9.marker & FOM_KEEP)) {
2065				r.keep_state = PF_STATE_NORMAL;
2066				o = keep_state_defaults;
2067				defaults = 1;
2068			}
2069
2070			while (o) {
2071				struct node_state_opt	*p = o;
2072
2073				switch (o->type) {
2074				case PF_STATE_OPT_MAX:
2075					if (r.max_states) {
2076						yyerror("state option 'max' "
2077						    "multiple definitions");
2078						YYERROR;
2079					}
2080					r.max_states = o->data.max_states;
2081					break;
2082				case PF_STATE_OPT_NOSYNC:
2083					if (r.rule_flag & PFRULE_NOSYNC) {
2084						yyerror("state option 'sync' "
2085						    "multiple definitions");
2086						YYERROR;
2087					}
2088					r.rule_flag |= PFRULE_NOSYNC;
2089					break;
2090				case PF_STATE_OPT_SRCTRACK:
2091					if (srctrack) {
2092						yyerror("state option "
2093						    "'source-track' "
2094						    "multiple definitions");
2095						YYERROR;
2096					}
2097					srctrack =  o->data.src_track;
2098					r.rule_flag |= PFRULE_SRCTRACK;
2099					break;
2100				case PF_STATE_OPT_MAX_SRC_STATES:
2101					if (r.max_src_states) {
2102						yyerror("state option "
2103						    "'max-src-states' "
2104						    "multiple definitions");
2105						YYERROR;
2106					}
2107					if (o->data.max_src_states == 0) {
2108						yyerror("'max-src-states' must "
2109						    "be > 0");
2110						YYERROR;
2111					}
2112					r.max_src_states =
2113					    o->data.max_src_states;
2114					r.rule_flag |= PFRULE_SRCTRACK;
2115					break;
2116				case PF_STATE_OPT_OVERLOAD:
2117					if (r.overload_tblname[0]) {
2118						yyerror("multiple 'overload' "
2119						    "table definitions");
2120						YYERROR;
2121					}
2122					if (strlcpy(r.overload_tblname,
2123					    o->data.overload.tblname,
2124					    PF_TABLE_NAME_SIZE) >=
2125					    PF_TABLE_NAME_SIZE) {
2126						yyerror("state option: "
2127						    "strlcpy");
2128						YYERROR;
2129					}
2130					r.flush = o->data.overload.flush;
2131					break;
2132				case PF_STATE_OPT_MAX_SRC_CONN:
2133					if (r.max_src_conn) {
2134						yyerror("state option "
2135						    "'max-src-conn' "
2136						    "multiple definitions");
2137						YYERROR;
2138					}
2139					if (o->data.max_src_conn == 0) {
2140						yyerror("'max-src-conn' "
2141						    "must be > 0");
2142						YYERROR;
2143					}
2144					r.max_src_conn =
2145					    o->data.max_src_conn;
2146					r.rule_flag |= PFRULE_SRCTRACK |
2147					    PFRULE_RULESRCTRACK;
2148					break;
2149				case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2150					if (r.max_src_conn_rate.limit) {
2151						yyerror("state option "
2152						    "'max-src-conn-rate' "
2153						    "multiple definitions");
2154						YYERROR;
2155					}
2156					if (!o->data.max_src_conn_rate.limit ||
2157					    !o->data.max_src_conn_rate.seconds) {
2158						yyerror("'max-src-conn-rate' "
2159						    "values must be > 0");
2160						YYERROR;
2161					}
2162					if (o->data.max_src_conn_rate.limit >
2163					    PF_THRESHOLD_MAX) {
2164						yyerror("'max-src-conn-rate' "
2165						    "maximum rate must be < %u",
2166						    PF_THRESHOLD_MAX);
2167						YYERROR;
2168					}
2169					r.max_src_conn_rate.limit =
2170					    o->data.max_src_conn_rate.limit;
2171					r.max_src_conn_rate.seconds =
2172					    o->data.max_src_conn_rate.seconds;
2173					r.rule_flag |= PFRULE_SRCTRACK |
2174					    PFRULE_RULESRCTRACK;
2175					break;
2176				case PF_STATE_OPT_MAX_SRC_NODES:
2177					if (r.max_src_nodes) {
2178						yyerror("state option "
2179						    "'max-src-nodes' "
2180						    "multiple definitions");
2181						YYERROR;
2182					}
2183					if (o->data.max_src_nodes == 0) {
2184						yyerror("'max-src-nodes' must "
2185						    "be > 0");
2186						YYERROR;
2187					}
2188					r.max_src_nodes =
2189					    o->data.max_src_nodes;
2190					r.rule_flag |= PFRULE_SRCTRACK |
2191					    PFRULE_RULESRCTRACK;
2192					break;
2193				case PF_STATE_OPT_STATELOCK:
2194					if (statelock) {
2195						yyerror("state locking option: "
2196						    "multiple definitions");
2197						YYERROR;
2198					}
2199					statelock = 1;
2200					r.rule_flag |= o->data.statelock;
2201					break;
2202				case PF_STATE_OPT_SLOPPY:
2203					if (r.rule_flag & PFRULE_STATESLOPPY) {
2204						yyerror("state sloppy option: "
2205						    "multiple definitions");
2206						YYERROR;
2207					}
2208					r.rule_flag |= PFRULE_STATESLOPPY;
2209					break;
2210				case PF_STATE_OPT_TIMEOUT:
2211					if (o->data.timeout.number ==
2212					    PFTM_ADAPTIVE_START ||
2213					    o->data.timeout.number ==
2214					    PFTM_ADAPTIVE_END)
2215						adaptive = 1;
2216					if (r.timeout[o->data.timeout.number]) {
2217						yyerror("state timeout %s "
2218						    "multiple definitions",
2219						    pf_timeouts[o->data.
2220						    timeout.number].name);
2221						YYERROR;
2222					}
2223					r.timeout[o->data.timeout.number] =
2224					    o->data.timeout.seconds;
2225				}
2226				o = o->next;
2227				if (!defaults)
2228					free(p);
2229			}
2230
2231			/* 'flags S/SA' by default on stateful rules */
2232			if (!r.action && !r.flags && !r.flagset &&
2233			    !$9.fragment && !($9.marker & FOM_FLAGS) &&
2234			    r.keep_state) {
2235				r.flags = parse_flags("S");
2236				r.flagset =  parse_flags("SA");
2237			}
2238			if (!adaptive && r.max_states) {
2239				r.timeout[PFTM_ADAPTIVE_START] =
2240				    (r.max_states / 10) * 6;
2241				r.timeout[PFTM_ADAPTIVE_END] =
2242				    (r.max_states / 10) * 12;
2243			}
2244			if (r.rule_flag & PFRULE_SRCTRACK) {
2245				if (srctrack == PF_SRCTRACK_GLOBAL &&
2246				    r.max_src_nodes) {
2247					yyerror("'max-src-nodes' is "
2248					    "incompatible with "
2249					    "'source-track global'");
2250					YYERROR;
2251				}
2252				if (srctrack == PF_SRCTRACK_GLOBAL &&
2253				    r.max_src_conn) {
2254					yyerror("'max-src-conn' is "
2255					    "incompatible with "
2256					    "'source-track global'");
2257					YYERROR;
2258				}
2259				if (srctrack == PF_SRCTRACK_GLOBAL &&
2260				    r.max_src_conn_rate.seconds) {
2261					yyerror("'max-src-conn-rate' is "
2262					    "incompatible with "
2263					    "'source-track global'");
2264					YYERROR;
2265				}
2266				if (r.timeout[PFTM_SRC_NODE] <
2267				    r.max_src_conn_rate.seconds)
2268					r.timeout[PFTM_SRC_NODE] =
2269					    r.max_src_conn_rate.seconds;
2270				r.rule_flag |= PFRULE_SRCTRACK;
2271				if (srctrack == PF_SRCTRACK_RULE)
2272					r.rule_flag |= PFRULE_RULESRCTRACK;
2273			}
2274			if (r.keep_state && !statelock)
2275				r.rule_flag |= default_statelock;
2276
2277			if ($9.fragment)
2278				r.rule_flag |= PFRULE_FRAGMENT;
2279			r.allow_opts = $9.allowopts;
2280
2281			decide_address_family($8.src.host, &r.af);
2282			decide_address_family($8.dst.host, &r.af);
2283
2284			if ($5.rt) {
2285				if (!r.direction) {
2286					yyerror("direction must be explicit "
2287					    "with rules that specify routing");
2288					YYERROR;
2289				}
2290				r.rt = $5.rt;
2291				r.rpool.opts = $5.pool_opts;
2292				if ($5.key != NULL)
2293					memcpy(&r.rpool.key, $5.key,
2294					    sizeof(struct pf_poolhashkey));
2295			}
2296			if (r.rt && r.rt != PF_FASTROUTE) {
2297				decide_address_family($5.host, &r.af);
2298				remove_invalid_hosts(&$5.host, &r.af);
2299				if ($5.host == NULL) {
2300					yyerror("no routing address with "
2301					    "matching address family found.");
2302					YYERROR;
2303				}
2304				if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2305				    PF_POOL_NONE && ($5.host->next != NULL ||
2306				    $5.host->addr.type == PF_ADDR_TABLE ||
2307				    DYNIF_MULTIADDR($5.host->addr)))
2308					r.rpool.opts |= PF_POOL_ROUNDROBIN;
2309				if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2310				    PF_POOL_ROUNDROBIN &&
2311				    disallow_table($5.host, "tables are only "
2312				    "supported in round-robin routing pools"))
2313					YYERROR;
2314				if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2315				    PF_POOL_ROUNDROBIN &&
2316				    disallow_alias($5.host, "interface (%s) "
2317				    "is only supported in round-robin "
2318				    "routing pools"))
2319					YYERROR;
2320				if ($5.host->next != NULL) {
2321					if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2322					    PF_POOL_ROUNDROBIN) {
2323						yyerror("r.rpool.opts must "
2324						    "be PF_POOL_ROUNDROBIN");
2325						YYERROR;
2326					}
2327				}
2328			}
2329			if ($9.queues.qname != NULL) {
2330				if (strlcpy(r.qname, $9.queues.qname,
2331				    sizeof(r.qname)) >= sizeof(r.qname)) {
2332					yyerror("rule qname too long (max "
2333					    "%d chars)", sizeof(r.qname)-1);
2334					YYERROR;
2335				}
2336				free($9.queues.qname);
2337			}
2338			if ($9.queues.pqname != NULL) {
2339				if (strlcpy(r.pqname, $9.queues.pqname,
2340				    sizeof(r.pqname)) >= sizeof(r.pqname)) {
2341					yyerror("rule pqname too long (max "
2342					    "%d chars)", sizeof(r.pqname)-1);
2343					YYERROR;
2344				}
2345				free($9.queues.pqname);
2346			}
2347#ifdef __FreeBSD__
2348			r.divert.port = $9.divert.port;
2349#else
2350			if ((r.divert.port = $9.divert.port)) {
2351				if (r.direction == PF_OUT) {
2352					if ($9.divert.addr) {
2353						yyerror("address specified "
2354						    "for outgoing divert");
2355						YYERROR;
2356					}
2357					bzero(&r.divert.addr,
2358					    sizeof(r.divert.addr));
2359				} else {
2360					if (!$9.divert.addr) {
2361						yyerror("no address specified "
2362						    "for incoming divert");
2363						YYERROR;
2364					}
2365					if ($9.divert.addr->af != r.af) {
2366						yyerror("address family "
2367						    "mismatch for divert");
2368						YYERROR;
2369					}
2370					r.divert.addr =
2371					    $9.divert.addr->addr.v.a.addr;
2372				}
2373			}
2374#endif
2375
2376			expand_rule(&r, $4, $5.host, $7, $8.src_os,
2377			    $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
2378			    $9.uid, $9.gid, $9.icmpspec, "");
2379		}
2380		;
2381
2382filter_opts	:	{
2383				bzero(&filter_opts, sizeof filter_opts);
2384				filter_opts.rtableid = -1;
2385			}
2386		    filter_opts_l
2387			{ $$ = filter_opts; }
2388		| /* empty */	{
2389			bzero(&filter_opts, sizeof filter_opts);
2390			filter_opts.rtableid = -1;
2391			$$ = filter_opts;
2392		}
2393		;
2394
2395filter_opts_l	: filter_opts_l filter_opt
2396		| filter_opt
2397		;
2398
2399filter_opt	: USER uids {
2400			if (filter_opts.uid)
2401				$2->tail->next = filter_opts.uid;
2402			filter_opts.uid = $2;
2403		}
2404		| GROUP gids {
2405			if (filter_opts.gid)
2406				$2->tail->next = filter_opts.gid;
2407			filter_opts.gid = $2;
2408		}
2409		| flags {
2410			if (filter_opts.marker & FOM_FLAGS) {
2411				yyerror("flags cannot be redefined");
2412				YYERROR;
2413			}
2414			filter_opts.marker |= FOM_FLAGS;
2415			filter_opts.flags.b1 |= $1.b1;
2416			filter_opts.flags.b2 |= $1.b2;
2417			filter_opts.flags.w |= $1.w;
2418			filter_opts.flags.w2 |= $1.w2;
2419		}
2420		| icmpspec {
2421			if (filter_opts.marker & FOM_ICMP) {
2422				yyerror("icmp-type cannot be redefined");
2423				YYERROR;
2424			}
2425			filter_opts.marker |= FOM_ICMP;
2426			filter_opts.icmpspec = $1;
2427		}
2428		| TOS tos {
2429			if (filter_opts.marker & FOM_TOS) {
2430				yyerror("tos cannot be redefined");
2431				YYERROR;
2432			}
2433			filter_opts.marker |= FOM_TOS;
2434			filter_opts.tos = $2;
2435		}
2436		| keep {
2437			if (filter_opts.marker & FOM_KEEP) {
2438				yyerror("modulate or keep cannot be redefined");
2439				YYERROR;
2440			}
2441			filter_opts.marker |= FOM_KEEP;
2442			filter_opts.keep.action = $1.action;
2443			filter_opts.keep.options = $1.options;
2444		}
2445		| FRAGMENT {
2446			filter_opts.fragment = 1;
2447		}
2448		| ALLOWOPTS {
2449			filter_opts.allowopts = 1;
2450		}
2451		| label	{
2452			if (filter_opts.label) {
2453				yyerror("label cannot be redefined");
2454				YYERROR;
2455			}
2456			filter_opts.label = $1;
2457		}
2458		| qname	{
2459			if (filter_opts.queues.qname) {
2460				yyerror("queue cannot be redefined");
2461				YYERROR;
2462			}
2463			filter_opts.queues = $1;
2464		}
2465		| TAG string				{
2466			filter_opts.tag = $2;
2467		}
2468		| not TAGGED string			{
2469			filter_opts.match_tag = $3;
2470			filter_opts.match_tag_not = $1;
2471		}
2472		| PROBABILITY probability		{
2473			double	p;
2474
2475			p = floor($2 * UINT_MAX + 0.5);
2476			if (p < 0.0 || p > UINT_MAX) {
2477				yyerror("invalid probability: %lf", p);
2478				YYERROR;
2479			}
2480			filter_opts.prob = (u_int32_t)p;
2481			if (filter_opts.prob == 0)
2482				filter_opts.prob = 1;
2483		}
2484		| RTABLE NUMBER				{
2485			if ($2 < 0 || $2 > rt_tableid_max()) {
2486				yyerror("invalid rtable id");
2487				YYERROR;
2488			}
2489			filter_opts.rtableid = $2;
2490		}
2491		| DIVERTTO portplain {
2492#ifdef __FreeBSD__
2493			filter_opts.divert.port = $2.a;
2494			if (!filter_opts.divert.port) {
2495				yyerror("invalid divert port: %u", ntohs($2.a));
2496				YYERROR;
2497			}
2498#endif
2499		}
2500		| DIVERTTO STRING PORT portplain {
2501#ifndef __FreeBSD__
2502			if ((filter_opts.divert.addr = host($2)) == NULL) {
2503				yyerror("could not parse divert address: %s",
2504				    $2);
2505				free($2);
2506				YYERROR;
2507			}
2508#else
2509			if ($2)
2510#endif
2511			free($2);
2512			filter_opts.divert.port = $4.a;
2513			if (!filter_opts.divert.port) {
2514				yyerror("invalid divert port: %u", ntohs($4.a));
2515				YYERROR;
2516			}
2517		}
2518		| DIVERTREPLY {
2519#ifdef __FreeBSD__
2520			yyerror("divert-reply has no meaning in FreeBSD pf(4)");
2521			YYERROR;
2522#else
2523			filter_opts.divert.port = 1;	/* some random value */
2524#endif
2525		}
2526		;
2527
2528probability	: STRING				{
2529			char	*e;
2530			double	 p = strtod($1, &e);
2531
2532			if (*e == '%') {
2533				p *= 0.01;
2534				e++;
2535			}
2536			if (*e) {
2537				yyerror("invalid probability: %s", $1);
2538				free($1);
2539				YYERROR;
2540			}
2541			free($1);
2542			$$ = p;
2543		}
2544		| NUMBER				{
2545			$$ = (double)$1;
2546		}
2547		;
2548
2549
2550action		: PASS			{ $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
2551		| BLOCK blockspec	{ $$ = $2; $$.b1 = PF_DROP; }
2552		;
2553
2554blockspec	: /* empty */		{
2555			$$.b2 = blockpolicy;
2556			$$.w = returnicmpdefault;
2557			$$.w2 = returnicmp6default;
2558		}
2559		| DROP			{
2560			$$.b2 = PFRULE_DROP;
2561			$$.w = 0;
2562			$$.w2 = 0;
2563		}
2564		| RETURNRST		{
2565			$$.b2 = PFRULE_RETURNRST;
2566			$$.w = 0;
2567			$$.w2 = 0;
2568		}
2569		| RETURNRST '(' TTL NUMBER ')'	{
2570			if ($4 < 0 || $4 > 255) {
2571				yyerror("illegal ttl value %d", $4);
2572				YYERROR;
2573			}
2574			$$.b2 = PFRULE_RETURNRST;
2575			$$.w = $4;
2576			$$.w2 = 0;
2577		}
2578		| RETURNICMP		{
2579			$$.b2 = PFRULE_RETURNICMP;
2580			$$.w = returnicmpdefault;
2581			$$.w2 = returnicmp6default;
2582		}
2583		| RETURNICMP6		{
2584			$$.b2 = PFRULE_RETURNICMP;
2585			$$.w = returnicmpdefault;
2586			$$.w2 = returnicmp6default;
2587		}
2588		| RETURNICMP '(' reticmpspec ')'	{
2589			$$.b2 = PFRULE_RETURNICMP;
2590			$$.w = $3;
2591			$$.w2 = returnicmpdefault;
2592		}
2593		| RETURNICMP6 '(' reticmp6spec ')'	{
2594			$$.b2 = PFRULE_RETURNICMP;
2595			$$.w = returnicmpdefault;
2596			$$.w2 = $3;
2597		}
2598		| RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2599			$$.b2 = PFRULE_RETURNICMP;
2600			$$.w = $3;
2601			$$.w2 = $5;
2602		}
2603		| RETURN {
2604			$$.b2 = PFRULE_RETURN;
2605			$$.w = returnicmpdefault;
2606			$$.w2 = returnicmp6default;
2607		}
2608		;
2609
2610reticmpspec	: STRING			{
2611			if (!($$ = parseicmpspec($1, AF_INET))) {
2612				free($1);
2613				YYERROR;
2614			}
2615			free($1);
2616		}
2617		| NUMBER			{
2618			u_int8_t		icmptype;
2619
2620			if ($1 < 0 || $1 > 255) {
2621				yyerror("invalid icmp code %lu", $1);
2622				YYERROR;
2623			}
2624			icmptype = returnicmpdefault >> 8;
2625			$$ = (icmptype << 8 | $1);
2626		}
2627		;
2628
2629reticmp6spec	: STRING			{
2630			if (!($$ = parseicmpspec($1, AF_INET6))) {
2631				free($1);
2632				YYERROR;
2633			}
2634			free($1);
2635		}
2636		| NUMBER			{
2637			u_int8_t		icmptype;
2638
2639			if ($1 < 0 || $1 > 255) {
2640				yyerror("invalid icmp code %lu", $1);
2641				YYERROR;
2642			}
2643			icmptype = returnicmp6default >> 8;
2644			$$ = (icmptype << 8 | $1);
2645		}
2646		;
2647
2648dir		: /* empty */			{ $$ = PF_INOUT; }
2649		| IN				{ $$ = PF_IN; }
2650		| OUT				{ $$ = PF_OUT; }
2651		;
2652
2653quick		: /* empty */			{ $$.quick = 0; }
2654		| QUICK				{ $$.quick = 1; }
2655		;
2656
2657logquick	: /* empty */	{ $$.log = 0; $$.quick = 0; $$.logif = 0; }
2658		| log		{ $$ = $1; $$.quick = 0; }
2659		| QUICK		{ $$.quick = 1; $$.log = 0; $$.logif = 0; }
2660		| log QUICK	{ $$ = $1; $$.quick = 1; }
2661		| QUICK log	{ $$ = $2; $$.quick = 1; }
2662		;
2663
2664log		: LOG			{ $$.log = PF_LOG; $$.logif = 0; }
2665		| LOG '(' logopts ')'	{
2666			$$.log = PF_LOG | $3.log;
2667			$$.logif = $3.logif;
2668		}
2669		;
2670
2671logopts		: logopt			{ $$ = $1; }
2672		| logopts comma logopt		{
2673			$$.log = $1.log | $3.log;
2674			$$.logif = $3.logif;
2675			if ($$.logif == 0)
2676				$$.logif = $1.logif;
2677		}
2678		;
2679
2680logopt		: ALL		{ $$.log = PF_LOG_ALL; $$.logif = 0; }
2681		| USER		{ $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2682		| GROUP		{ $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2683		| TO string	{
2684			const char	*errstr;
2685			u_int		 i;
2686
2687			$$.log = 0;
2688			if (strncmp($2, "pflog", 5)) {
2689				yyerror("%s: should be a pflog interface", $2);
2690				free($2);
2691				YYERROR;
2692			}
2693			i = strtonum($2 + 5, 0, 255, &errstr);
2694			if (errstr) {
2695				yyerror("%s: %s", $2, errstr);
2696				free($2);
2697				YYERROR;
2698			}
2699			free($2);
2700			$$.logif = i;
2701		}
2702		;
2703
2704interface	: /* empty */			{ $$ = NULL; }
2705		| ON if_item_not		{ $$ = $2; }
2706		| ON '{' optnl if_list '}'	{ $$ = $4; }
2707		;
2708
2709if_list		: if_item_not optnl		{ $$ = $1; }
2710		| if_list comma if_item_not optnl	{
2711			$1->tail->next = $3;
2712			$1->tail = $3;
2713			$$ = $1;
2714		}
2715		;
2716
2717if_item_not	: not if_item			{ $$ = $2; $$->not = $1; }
2718		;
2719
2720if_item		: STRING			{
2721			struct node_host	*n;
2722
2723			$$ = calloc(1, sizeof(struct node_if));
2724			if ($$ == NULL)
2725				err(1, "if_item: calloc");
2726			if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2727			    sizeof($$->ifname)) {
2728				free($1);
2729				free($$);
2730				yyerror("interface name too long");
2731				YYERROR;
2732			}
2733
2734			if ((n = ifa_exists($1)) != NULL)
2735				$$->ifa_flags = n->ifa_flags;
2736
2737			free($1);
2738			$$->not = 0;
2739			$$->next = NULL;
2740			$$->tail = $$;
2741		}
2742		;
2743
2744af		: /* empty */			{ $$ = 0; }
2745		| INET				{ $$ = AF_INET; }
2746		| INET6				{ $$ = AF_INET6; }
2747		;
2748
2749proto		: /* empty */				{ $$ = NULL; }
2750		| PROTO proto_item			{ $$ = $2; }
2751		| PROTO '{' optnl proto_list '}'	{ $$ = $4; }
2752		;
2753
2754proto_list	: proto_item optnl		{ $$ = $1; }
2755		| proto_list comma proto_item optnl	{
2756			$1->tail->next = $3;
2757			$1->tail = $3;
2758			$$ = $1;
2759		}
2760		;
2761
2762proto_item	: protoval			{
2763			u_int8_t	pr;
2764
2765			pr = (u_int8_t)$1;
2766			if (pr == 0) {
2767				yyerror("proto 0 cannot be used");
2768				YYERROR;
2769			}
2770			$$ = calloc(1, sizeof(struct node_proto));
2771			if ($$ == NULL)
2772				err(1, "proto_item: calloc");
2773			$$->proto = pr;
2774			$$->next = NULL;
2775			$$->tail = $$;
2776		}
2777		;
2778
2779protoval	: STRING			{
2780			struct protoent	*p;
2781
2782			p = getprotobyname($1);
2783			if (p == NULL) {
2784				yyerror("unknown protocol %s", $1);
2785				free($1);
2786				YYERROR;
2787			}
2788			$$ = p->p_proto;
2789			free($1);
2790		}
2791		| NUMBER			{
2792			if ($1 < 0 || $1 > 255) {
2793				yyerror("protocol outside range");
2794				YYERROR;
2795			}
2796		}
2797		;
2798
2799fromto		: ALL				{
2800			$$.src.host = NULL;
2801			$$.src.port = NULL;
2802			$$.dst.host = NULL;
2803			$$.dst.port = NULL;
2804			$$.src_os = NULL;
2805		}
2806		| from os to			{
2807			$$.src = $1;
2808			$$.src_os = $2;
2809			$$.dst = $3;
2810		}
2811		;
2812
2813os		: /* empty */			{ $$ = NULL; }
2814		| OS xos			{ $$ = $2; }
2815		| OS '{' optnl os_list '}'	{ $$ = $4; }
2816		;
2817
2818xos		: STRING {
2819			$$ = calloc(1, sizeof(struct node_os));
2820			if ($$ == NULL)
2821				err(1, "os: calloc");
2822			$$->os = $1;
2823			$$->tail = $$;
2824		}
2825		;
2826
2827os_list		: xos optnl 			{ $$ = $1; }
2828		| os_list comma xos optnl	{
2829			$1->tail->next = $3;
2830			$1->tail = $3;
2831			$$ = $1;
2832		}
2833		;
2834
2835from		: /* empty */			{
2836			$$.host = NULL;
2837			$$.port = NULL;
2838		}
2839		| FROM ipportspec		{
2840			$$ = $2;
2841		}
2842		;
2843
2844to		: /* empty */			{
2845			$$.host = NULL;
2846			$$.port = NULL;
2847		}
2848		| TO ipportspec		{
2849			if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
2850			    "not permitted in a destination address"))
2851				YYERROR;
2852			$$ = $2;
2853		}
2854		;
2855
2856ipportspec	: ipspec			{
2857			$$.host = $1;
2858			$$.port = NULL;
2859		}
2860		| ipspec PORT portspec		{
2861			$$.host = $1;
2862			$$.port = $3;
2863		}
2864		| PORT portspec			{
2865			$$.host = NULL;
2866			$$.port = $2;
2867		}
2868		;
2869
2870optnl		: '\n' optnl
2871		|
2872		;
2873
2874ipspec		: ANY				{ $$ = NULL; }
2875		| xhost				{ $$ = $1; }
2876		| '{' optnl host_list '}'	{ $$ = $3; }
2877		;
2878
2879toipspec	: TO ipspec			{ $$ = $2; }
2880		| /* empty */			{ $$ = NULL; }
2881		;
2882
2883host_list	: ipspec optnl			{ $$ = $1; }
2884		| host_list comma ipspec optnl	{
2885			if ($3 == NULL)
2886				$$ = $1;
2887			else if ($1 == NULL)
2888				$$ = $3;
2889			else {
2890				$1->tail->next = $3;
2891				$1->tail = $3->tail;
2892				$$ = $1;
2893			}
2894		}
2895		;
2896
2897xhost		: not host			{
2898			struct node_host	*n;
2899
2900			for (n = $2; n != NULL; n = n->next)
2901				n->not = $1;
2902			$$ = $2;
2903		}
2904		| not NOROUTE			{
2905			$$ = calloc(1, sizeof(struct node_host));
2906			if ($$ == NULL)
2907				err(1, "xhost: calloc");
2908			$$->addr.type = PF_ADDR_NOROUTE;
2909			$$->next = NULL;
2910			$$->not = $1;
2911			$$->tail = $$;
2912		}
2913		| not URPFFAILED		{
2914			$$ = calloc(1, sizeof(struct node_host));
2915			if ($$ == NULL)
2916				err(1, "xhost: calloc");
2917			$$->addr.type = PF_ADDR_URPFFAILED;
2918			$$->next = NULL;
2919			$$->not = $1;
2920			$$->tail = $$;
2921		}
2922		;
2923
2924host		: STRING			{
2925			if (($$ = host($1)) == NULL)	{
2926				/* error. "any" is handled elsewhere */
2927				free($1);
2928				yyerror("could not parse host specification");
2929				YYERROR;
2930			}
2931			free($1);
2932
2933		}
2934		| STRING '-' STRING		{
2935			struct node_host *b, *e;
2936
2937			if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
2938				free($1);
2939				free($3);
2940				yyerror("could not parse host specification");
2941				YYERROR;
2942			}
2943			if (b->af != e->af ||
2944			    b->addr.type != PF_ADDR_ADDRMASK ||
2945			    e->addr.type != PF_ADDR_ADDRMASK ||
2946			    unmask(&b->addr.v.a.mask, b->af) !=
2947			    (b->af == AF_INET ? 32 : 128) ||
2948			    unmask(&e->addr.v.a.mask, e->af) !=
2949			    (e->af == AF_INET ? 32 : 128) ||
2950			    b->next != NULL || b->not ||
2951			    e->next != NULL || e->not) {
2952				free(b);
2953				free(e);
2954				free($1);
2955				free($3);
2956				yyerror("invalid address range");
2957				YYERROR;
2958			}
2959			memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
2960			    sizeof(b->addr.v.a.mask));
2961			b->addr.type = PF_ADDR_RANGE;
2962			$$ = b;
2963			free(e);
2964			free($1);
2965			free($3);
2966		}
2967		| STRING '/' NUMBER		{
2968			char	*buf;
2969
2970			if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1)
2971				err(1, "host: asprintf");
2972			free($1);
2973			if (($$ = host(buf)) == NULL)	{
2974				/* error. "any" is handled elsewhere */
2975				free(buf);
2976				yyerror("could not parse host specification");
2977				YYERROR;
2978			}
2979			free(buf);
2980		}
2981		| NUMBER '/' NUMBER		{
2982			char	*buf;
2983
2984			/* ie. for 10/8 parsing */
2985#ifdef __FreeBSD__
2986			if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1)
2987#else
2988			if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
2989#endif
2990				err(1, "host: asprintf");
2991			if (($$ = host(buf)) == NULL)	{
2992				/* error. "any" is handled elsewhere */
2993				free(buf);
2994				yyerror("could not parse host specification");
2995				YYERROR;
2996			}
2997			free(buf);
2998		}
2999		| dynaddr
3000		| dynaddr '/' NUMBER		{
3001			struct node_host	*n;
3002
3003			if ($3 < 0 || $3 > 128) {
3004				yyerror("bit number too big");
3005				YYERROR;
3006			}
3007			$$ = $1;
3008			for (n = $1; n != NULL; n = n->next)
3009				set_ipmask(n, $3);
3010		}
3011		| '<' STRING '>'	{
3012			if (strlen($2) >= PF_TABLE_NAME_SIZE) {
3013				yyerror("table name '%s' too long", $2);
3014				free($2);
3015				YYERROR;
3016			}
3017			$$ = calloc(1, sizeof(struct node_host));
3018			if ($$ == NULL)
3019				err(1, "host: calloc");
3020			$$->addr.type = PF_ADDR_TABLE;
3021			if (strlcpy($$->addr.v.tblname, $2,
3022			    sizeof($$->addr.v.tblname)) >=
3023			    sizeof($$->addr.v.tblname))
3024				errx(1, "host: strlcpy");
3025			free($2);
3026			$$->next = NULL;
3027			$$->tail = $$;
3028		}
3029		;
3030
3031number		: NUMBER
3032		| STRING		{
3033			u_long	ulval;
3034
3035			if (atoul($1, &ulval) == -1) {
3036				yyerror("%s is not a number", $1);
3037				free($1);
3038				YYERROR;
3039			} else
3040				$$ = ulval;
3041			free($1);
3042		}
3043		;
3044
3045dynaddr		: '(' STRING ')'		{
3046			int	 flags = 0;
3047			char	*p, *op;
3048
3049			op = $2;
3050			if (!isalpha(op[0])) {
3051				yyerror("invalid interface name '%s'", op);
3052				free(op);
3053				YYERROR;
3054			}
3055			while ((p = strrchr($2, ':')) != NULL) {
3056				if (!strcmp(p+1, "network"))
3057					flags |= PFI_AFLAG_NETWORK;
3058				else if (!strcmp(p+1, "broadcast"))
3059					flags |= PFI_AFLAG_BROADCAST;
3060				else if (!strcmp(p+1, "peer"))
3061					flags |= PFI_AFLAG_PEER;
3062				else if (!strcmp(p+1, "0"))
3063					flags |= PFI_AFLAG_NOALIAS;
3064				else {
3065					yyerror("interface %s has bad modifier",
3066					    $2);
3067					free(op);
3068					YYERROR;
3069				}
3070				*p = '\0';
3071			}
3072			if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3073				free(op);
3074				yyerror("illegal combination of "
3075				    "interface modifiers");
3076				YYERROR;
3077			}
3078			$$ = calloc(1, sizeof(struct node_host));
3079			if ($$ == NULL)
3080				err(1, "address: calloc");
3081			$$->af = 0;
3082			set_ipmask($$, 128);
3083			$$->addr.type = PF_ADDR_DYNIFTL;
3084			$$->addr.iflags = flags;
3085			if (strlcpy($$->addr.v.ifname, $2,
3086			    sizeof($$->addr.v.ifname)) >=
3087			    sizeof($$->addr.v.ifname)) {
3088				free(op);
3089				free($$);
3090				yyerror("interface name too long");
3091				YYERROR;
3092			}
3093			free(op);
3094			$$->next = NULL;
3095			$$->tail = $$;
3096		}
3097		;
3098
3099portspec	: port_item			{ $$ = $1; }
3100		| '{' optnl port_list '}'	{ $$ = $3; }
3101		;
3102
3103port_list	: port_item optnl		{ $$ = $1; }
3104		| port_list comma port_item optnl	{
3105			$1->tail->next = $3;
3106			$1->tail = $3;
3107			$$ = $1;
3108		}
3109		;
3110
3111port_item	: portrange			{
3112			$$ = calloc(1, sizeof(struct node_port));
3113			if ($$ == NULL)
3114				err(1, "port_item: calloc");
3115			$$->port[0] = $1.a;
3116			$$->port[1] = $1.b;
3117			if ($1.t)
3118				$$->op = PF_OP_RRG;
3119			else
3120				$$->op = PF_OP_EQ;
3121			$$->next = NULL;
3122			$$->tail = $$;
3123		}
3124		| unaryop portrange	{
3125			if ($2.t) {
3126				yyerror("':' cannot be used with an other "
3127				    "port operator");
3128				YYERROR;
3129			}
3130			$$ = calloc(1, sizeof(struct node_port));
3131			if ($$ == NULL)
3132				err(1, "port_item: calloc");
3133			$$->port[0] = $2.a;
3134			$$->port[1] = $2.b;
3135			$$->op = $1;
3136			$$->next = NULL;
3137			$$->tail = $$;
3138		}
3139		| portrange PORTBINARY portrange	{
3140			if ($1.t || $3.t) {
3141				yyerror("':' cannot be used with an other "
3142				    "port operator");
3143				YYERROR;
3144			}
3145			$$ = calloc(1, sizeof(struct node_port));
3146			if ($$ == NULL)
3147				err(1, "port_item: calloc");
3148			$$->port[0] = $1.a;
3149			$$->port[1] = $3.a;
3150			$$->op = $2;
3151			$$->next = NULL;
3152			$$->tail = $$;
3153		}
3154		;
3155
3156portplain	: numberstring			{
3157			if (parseport($1, &$$, 0) == -1) {
3158				free($1);
3159				YYERROR;
3160			}
3161			free($1);
3162		}
3163		;
3164
3165portrange	: numberstring			{
3166			if (parseport($1, &$$, PPORT_RANGE) == -1) {
3167				free($1);
3168				YYERROR;
3169			}
3170			free($1);
3171		}
3172		;
3173
3174uids		: uid_item			{ $$ = $1; }
3175		| '{' optnl uid_list '}'	{ $$ = $3; }
3176		;
3177
3178uid_list	: uid_item optnl		{ $$ = $1; }
3179		| uid_list comma uid_item optnl	{
3180			$1->tail->next = $3;
3181			$1->tail = $3;
3182			$$ = $1;
3183		}
3184		;
3185
3186uid_item	: uid				{
3187			$$ = calloc(1, sizeof(struct node_uid));
3188			if ($$ == NULL)
3189				err(1, "uid_item: calloc");
3190			$$->uid[0] = $1;
3191			$$->uid[1] = $1;
3192			$$->op = PF_OP_EQ;
3193			$$->next = NULL;
3194			$$->tail = $$;
3195		}
3196		| unaryop uid			{
3197			if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3198				yyerror("user unknown requires operator = or "
3199				    "!=");
3200				YYERROR;
3201			}
3202			$$ = calloc(1, sizeof(struct node_uid));
3203			if ($$ == NULL)
3204				err(1, "uid_item: calloc");
3205			$$->uid[0] = $2;
3206			$$->uid[1] = $2;
3207			$$->op = $1;
3208			$$->next = NULL;
3209			$$->tail = $$;
3210		}
3211		| uid PORTBINARY uid		{
3212			if ($1 == UID_MAX || $3 == UID_MAX) {
3213				yyerror("user unknown requires operator = or "
3214				    "!=");
3215				YYERROR;
3216			}
3217			$$ = calloc(1, sizeof(struct node_uid));
3218			if ($$ == NULL)
3219				err(1, "uid_item: calloc");
3220			$$->uid[0] = $1;
3221			$$->uid[1] = $3;
3222			$$->op = $2;
3223			$$->next = NULL;
3224			$$->tail = $$;
3225		}
3226		;
3227
3228uid		: STRING			{
3229			if (!strcmp($1, "unknown"))
3230				$$ = UID_MAX;
3231			else {
3232				struct passwd	*pw;
3233
3234				if ((pw = getpwnam($1)) == NULL) {
3235					yyerror("unknown user %s", $1);
3236					free($1);
3237					YYERROR;
3238				}
3239				$$ = pw->pw_uid;
3240			}
3241			free($1);
3242		}
3243		| NUMBER			{
3244			if ($1 < 0 || $1 >= UID_MAX) {
3245				yyerror("illegal uid value %lu", $1);
3246				YYERROR;
3247			}
3248			$$ = $1;
3249		}
3250		;
3251
3252gids		: gid_item			{ $$ = $1; }
3253		| '{' optnl gid_list '}'	{ $$ = $3; }
3254		;
3255
3256gid_list	: gid_item optnl		{ $$ = $1; }
3257		| gid_list comma gid_item optnl	{
3258			$1->tail->next = $3;
3259			$1->tail = $3;
3260			$$ = $1;
3261		}
3262		;
3263
3264gid_item	: gid				{
3265			$$ = calloc(1, sizeof(struct node_gid));
3266			if ($$ == NULL)
3267				err(1, "gid_item: calloc");
3268			$$->gid[0] = $1;
3269			$$->gid[1] = $1;
3270			$$->op = PF_OP_EQ;
3271			$$->next = NULL;
3272			$$->tail = $$;
3273		}
3274		| unaryop gid			{
3275			if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3276				yyerror("group unknown requires operator = or "
3277				    "!=");
3278				YYERROR;
3279			}
3280			$$ = calloc(1, sizeof(struct node_gid));
3281			if ($$ == NULL)
3282				err(1, "gid_item: calloc");
3283			$$->gid[0] = $2;
3284			$$->gid[1] = $2;
3285			$$->op = $1;
3286			$$->next = NULL;
3287			$$->tail = $$;
3288		}
3289		| gid PORTBINARY gid		{
3290			if ($1 == GID_MAX || $3 == GID_MAX) {
3291				yyerror("group unknown requires operator = or "
3292				    "!=");
3293				YYERROR;
3294			}
3295			$$ = calloc(1, sizeof(struct node_gid));
3296			if ($$ == NULL)
3297				err(1, "gid_item: calloc");
3298			$$->gid[0] = $1;
3299			$$->gid[1] = $3;
3300			$$->op = $2;
3301			$$->next = NULL;
3302			$$->tail = $$;
3303		}
3304		;
3305
3306gid		: STRING			{
3307			if (!strcmp($1, "unknown"))
3308				$$ = GID_MAX;
3309			else {
3310				struct group	*grp;
3311
3312				if ((grp = getgrnam($1)) == NULL) {
3313					yyerror("unknown group %s", $1);
3314					free($1);
3315					YYERROR;
3316				}
3317				$$ = grp->gr_gid;
3318			}
3319			free($1);
3320		}
3321		| NUMBER			{
3322			if ($1 < 0 || $1 >= GID_MAX) {
3323				yyerror("illegal gid value %lu", $1);
3324				YYERROR;
3325			}
3326			$$ = $1;
3327		}
3328		;
3329
3330flag		: STRING			{
3331			int	f;
3332
3333			if ((f = parse_flags($1)) < 0) {
3334				yyerror("bad flags %s", $1);
3335				free($1);
3336				YYERROR;
3337			}
3338			free($1);
3339			$$.b1 = f;
3340		}
3341		;
3342
3343flags		: FLAGS flag '/' flag	{ $$.b1 = $2.b1; $$.b2 = $4.b1; }
3344		| FLAGS '/' flag	{ $$.b1 = 0; $$.b2 = $3.b1; }
3345		| FLAGS ANY		{ $$.b1 = 0; $$.b2 = 0; }
3346		;
3347
3348icmpspec	: ICMPTYPE icmp_item			{ $$ = $2; }
3349		| ICMPTYPE '{' optnl icmp_list '}'	{ $$ = $4; }
3350		| ICMP6TYPE icmp6_item			{ $$ = $2; }
3351		| ICMP6TYPE '{' optnl icmp6_list '}'	{ $$ = $4; }
3352		;
3353
3354icmp_list	: icmp_item optnl		{ $$ = $1; }
3355		| icmp_list comma icmp_item optnl {
3356			$1->tail->next = $3;
3357			$1->tail = $3;
3358			$$ = $1;
3359		}
3360		;
3361
3362icmp6_list	: icmp6_item optnl		{ $$ = $1; }
3363		| icmp6_list comma icmp6_item optnl {
3364			$1->tail->next = $3;
3365			$1->tail = $3;
3366			$$ = $1;
3367		}
3368		;
3369
3370icmp_item	: icmptype		{
3371			$$ = calloc(1, sizeof(struct node_icmp));
3372			if ($$ == NULL)
3373				err(1, "icmp_item: calloc");
3374			$$->type = $1;
3375			$$->code = 0;
3376			$$->proto = IPPROTO_ICMP;
3377			$$->next = NULL;
3378			$$->tail = $$;
3379		}
3380		| icmptype CODE STRING	{
3381			const struct icmpcodeent	*p;
3382
3383			if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3384				yyerror("unknown icmp-code %s", $3);
3385				free($3);
3386				YYERROR;
3387			}
3388
3389			free($3);
3390			$$ = calloc(1, sizeof(struct node_icmp));
3391			if ($$ == NULL)
3392				err(1, "icmp_item: calloc");
3393			$$->type = $1;
3394			$$->code = p->code + 1;
3395			$$->proto = IPPROTO_ICMP;
3396			$$->next = NULL;
3397			$$->tail = $$;
3398		}
3399		| icmptype CODE NUMBER	{
3400			if ($3 < 0 || $3 > 255) {
3401				yyerror("illegal icmp-code %lu", $3);
3402				YYERROR;
3403			}
3404			$$ = calloc(1, sizeof(struct node_icmp));
3405			if ($$ == NULL)
3406				err(1, "icmp_item: calloc");
3407			$$->type = $1;
3408			$$->code = $3 + 1;
3409			$$->proto = IPPROTO_ICMP;
3410			$$->next = NULL;
3411			$$->tail = $$;
3412		}
3413		;
3414
3415icmp6_item	: icmp6type		{
3416			$$ = calloc(1, sizeof(struct node_icmp));
3417			if ($$ == NULL)
3418				err(1, "icmp_item: calloc");
3419			$$->type = $1;
3420			$$->code = 0;
3421			$$->proto = IPPROTO_ICMPV6;
3422			$$->next = NULL;
3423			$$->tail = $$;
3424		}
3425		| icmp6type CODE STRING	{
3426			const struct icmpcodeent	*p;
3427
3428			if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3429				yyerror("unknown icmp6-code %s", $3);
3430				free($3);
3431				YYERROR;
3432			}
3433			free($3);
3434
3435			$$ = calloc(1, sizeof(struct node_icmp));
3436			if ($$ == NULL)
3437				err(1, "icmp_item: calloc");
3438			$$->type = $1;
3439			$$->code = p->code + 1;
3440			$$->proto = IPPROTO_ICMPV6;
3441			$$->next = NULL;
3442			$$->tail = $$;
3443		}
3444		| icmp6type CODE NUMBER	{
3445			if ($3 < 0 || $3 > 255) {
3446				yyerror("illegal icmp-code %lu", $3);
3447				YYERROR;
3448			}
3449			$$ = calloc(1, sizeof(struct node_icmp));
3450			if ($$ == NULL)
3451				err(1, "icmp_item: calloc");
3452			$$->type = $1;
3453			$$->code = $3 + 1;
3454			$$->proto = IPPROTO_ICMPV6;
3455			$$->next = NULL;
3456			$$->tail = $$;
3457		}
3458		;
3459
3460icmptype	: STRING			{
3461			const struct icmptypeent	*p;
3462
3463			if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3464				yyerror("unknown icmp-type %s", $1);
3465				free($1);
3466				YYERROR;
3467			}
3468			$$ = p->type + 1;
3469			free($1);
3470		}
3471		| NUMBER			{
3472			if ($1 < 0 || $1 > 255) {
3473				yyerror("illegal icmp-type %lu", $1);
3474				YYERROR;
3475			}
3476			$$ = $1 + 1;
3477		}
3478		;
3479
3480icmp6type	: STRING			{
3481			const struct icmptypeent	*p;
3482
3483			if ((p = geticmptypebyname($1, AF_INET6)) ==
3484			    NULL) {
3485				yyerror("unknown icmp6-type %s", $1);
3486				free($1);
3487				YYERROR;
3488			}
3489			$$ = p->type + 1;
3490			free($1);
3491		}
3492		| NUMBER			{
3493			if ($1 < 0 || $1 > 255) {
3494				yyerror("illegal icmp6-type %lu", $1);
3495				YYERROR;
3496			}
3497			$$ = $1 + 1;
3498		}
3499		;
3500
3501tos	: STRING			{
3502			if (!strcmp($1, "lowdelay"))
3503				$$ = IPTOS_LOWDELAY;
3504			else if (!strcmp($1, "throughput"))
3505				$$ = IPTOS_THROUGHPUT;
3506			else if (!strcmp($1, "reliability"))
3507				$$ = IPTOS_RELIABILITY;
3508			else if ($1[0] == '0' && $1[1] == 'x')
3509				$$ = strtoul($1, NULL, 16);
3510			else
3511				$$ = 0;		/* flag bad argument */
3512			if (!$$ || $$ > 255) {
3513				yyerror("illegal tos value %s", $1);
3514				free($1);
3515				YYERROR;
3516			}
3517			free($1);
3518		}
3519		| NUMBER			{
3520			$$ = $1;
3521			if (!$$ || $$ > 255) {
3522				yyerror("illegal tos value %s", $1);
3523				YYERROR;
3524			}
3525		}
3526		;
3527
3528sourcetrack	: SOURCETRACK		{ $$ = PF_SRCTRACK; }
3529		| SOURCETRACK GLOBAL	{ $$ = PF_SRCTRACK_GLOBAL; }
3530		| SOURCETRACK RULE	{ $$ = PF_SRCTRACK_RULE; }
3531		;
3532
3533statelock	: IFBOUND {
3534			$$ = PFRULE_IFBOUND;
3535		}
3536		| FLOATING {
3537			$$ = 0;
3538		}
3539		;
3540
3541keep		: NO STATE			{
3542			$$.action = 0;
3543			$$.options = NULL;
3544		}
3545		| KEEP STATE state_opt_spec	{
3546			$$.action = PF_STATE_NORMAL;
3547			$$.options = $3;
3548		}
3549		| MODULATE STATE state_opt_spec {
3550			$$.action = PF_STATE_MODULATE;
3551			$$.options = $3;
3552		}
3553		| SYNPROXY STATE state_opt_spec {
3554			$$.action = PF_STATE_SYNPROXY;
3555			$$.options = $3;
3556		}
3557		;
3558
3559flush		: /* empty */			{ $$ = 0; }
3560		| FLUSH				{ $$ = PF_FLUSH; }
3561		| FLUSH GLOBAL			{
3562			$$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3563		}
3564		;
3565
3566state_opt_spec	: '(' state_opt_list ')'	{ $$ = $2; }
3567		| /* empty */			{ $$ = NULL; }
3568		;
3569
3570state_opt_list	: state_opt_item		{ $$ = $1; }
3571		| state_opt_list comma state_opt_item {
3572			$1->tail->next = $3;
3573			$1->tail = $3;
3574			$$ = $1;
3575		}
3576		;
3577
3578state_opt_item	: MAXIMUM NUMBER		{
3579			if ($2 < 0 || $2 > UINT_MAX) {
3580				yyerror("only positive values permitted");
3581				YYERROR;
3582			}
3583			$$ = calloc(1, sizeof(struct node_state_opt));
3584			if ($$ == NULL)
3585				err(1, "state_opt_item: calloc");
3586			$$->type = PF_STATE_OPT_MAX;
3587			$$->data.max_states = $2;
3588			$$->next = NULL;
3589			$$->tail = $$;
3590		}
3591		| NOSYNC				{
3592			$$ = calloc(1, sizeof(struct node_state_opt));
3593			if ($$ == NULL)
3594				err(1, "state_opt_item: calloc");
3595			$$->type = PF_STATE_OPT_NOSYNC;
3596			$$->next = NULL;
3597			$$->tail = $$;
3598		}
3599		| MAXSRCSTATES NUMBER			{
3600			if ($2 < 0 || $2 > UINT_MAX) {
3601				yyerror("only positive values permitted");
3602				YYERROR;
3603			}
3604			$$ = calloc(1, sizeof(struct node_state_opt));
3605			if ($$ == NULL)
3606				err(1, "state_opt_item: calloc");
3607			$$->type = PF_STATE_OPT_MAX_SRC_STATES;
3608			$$->data.max_src_states = $2;
3609			$$->next = NULL;
3610			$$->tail = $$;
3611		}
3612		| MAXSRCCONN NUMBER			{
3613			if ($2 < 0 || $2 > UINT_MAX) {
3614				yyerror("only positive values permitted");
3615				YYERROR;
3616			}
3617			$$ = calloc(1, sizeof(struct node_state_opt));
3618			if ($$ == NULL)
3619				err(1, "state_opt_item: calloc");
3620			$$->type = PF_STATE_OPT_MAX_SRC_CONN;
3621			$$->data.max_src_conn = $2;
3622			$$->next = NULL;
3623			$$->tail = $$;
3624		}
3625		| MAXSRCCONNRATE NUMBER '/' NUMBER	{
3626			if ($2 < 0 || $2 > UINT_MAX ||
3627			    $4 < 0 || $4 > UINT_MAX) {
3628				yyerror("only positive values permitted");
3629				YYERROR;
3630			}
3631			$$ = calloc(1, sizeof(struct node_state_opt));
3632			if ($$ == NULL)
3633				err(1, "state_opt_item: calloc");
3634			$$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3635			$$->data.max_src_conn_rate.limit = $2;
3636			$$->data.max_src_conn_rate.seconds = $4;
3637			$$->next = NULL;
3638			$$->tail = $$;
3639		}
3640		| OVERLOAD '<' STRING '>' flush		{
3641			if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3642				yyerror("table name '%s' too long", $3);
3643				free($3);
3644				YYERROR;
3645			}
3646			$$ = calloc(1, sizeof(struct node_state_opt));
3647			if ($$ == NULL)
3648				err(1, "state_opt_item: calloc");
3649			if (strlcpy($$->data.overload.tblname, $3,
3650			    PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3651				errx(1, "state_opt_item: strlcpy");
3652			free($3);
3653			$$->type = PF_STATE_OPT_OVERLOAD;
3654			$$->data.overload.flush = $5;
3655			$$->next = NULL;
3656			$$->tail = $$;
3657		}
3658		| MAXSRCNODES NUMBER			{
3659			if ($2 < 0 || $2 > UINT_MAX) {
3660				yyerror("only positive values permitted");
3661				YYERROR;
3662			}
3663			$$ = calloc(1, sizeof(struct node_state_opt));
3664			if ($$ == NULL)
3665				err(1, "state_opt_item: calloc");
3666			$$->type = PF_STATE_OPT_MAX_SRC_NODES;
3667			$$->data.max_src_nodes = $2;
3668			$$->next = NULL;
3669			$$->tail = $$;
3670		}
3671		| sourcetrack {
3672			$$ = calloc(1, sizeof(struct node_state_opt));
3673			if ($$ == NULL)
3674				err(1, "state_opt_item: calloc");
3675			$$->type = PF_STATE_OPT_SRCTRACK;
3676			$$->data.src_track = $1;
3677			$$->next = NULL;
3678			$$->tail = $$;
3679		}
3680		| statelock {
3681			$$ = calloc(1, sizeof(struct node_state_opt));
3682			if ($$ == NULL)
3683				err(1, "state_opt_item: calloc");
3684			$$->type = PF_STATE_OPT_STATELOCK;
3685			$$->data.statelock = $1;
3686			$$->next = NULL;
3687			$$->tail = $$;
3688		}
3689		| SLOPPY {
3690			$$ = calloc(1, sizeof(struct node_state_opt));
3691			if ($$ == NULL)
3692				err(1, "state_opt_item: calloc");
3693			$$->type = PF_STATE_OPT_SLOPPY;
3694			$$->next = NULL;
3695			$$->tail = $$;
3696		}
3697		| STRING NUMBER			{
3698			int	i;
3699
3700			if ($2 < 0 || $2 > UINT_MAX) {
3701				yyerror("only positive values permitted");
3702				YYERROR;
3703			}
3704			for (i = 0; pf_timeouts[i].name &&
3705			    strcmp(pf_timeouts[i].name, $1); ++i)
3706				;	/* nothing */
3707			if (!pf_timeouts[i].name) {
3708				yyerror("illegal timeout name %s", $1);
3709				free($1);
3710				YYERROR;
3711			}
3712			if (strchr(pf_timeouts[i].name, '.') == NULL) {
3713				yyerror("illegal state timeout %s", $1);
3714				free($1);
3715				YYERROR;
3716			}
3717			free($1);
3718			$$ = calloc(1, sizeof(struct node_state_opt));
3719			if ($$ == NULL)
3720				err(1, "state_opt_item: calloc");
3721			$$->type = PF_STATE_OPT_TIMEOUT;
3722			$$->data.timeout.number = pf_timeouts[i].timeout;
3723			$$->data.timeout.seconds = $2;
3724			$$->next = NULL;
3725			$$->tail = $$;
3726		}
3727		;
3728
3729label		: LABEL STRING			{
3730			$$ = $2;
3731		}
3732		;
3733
3734qname		: QUEUE STRING				{
3735			$$.qname = $2;
3736			$$.pqname = NULL;
3737		}
3738		| QUEUE '(' STRING ')'			{
3739			$$.qname = $3;
3740			$$.pqname = NULL;
3741		}
3742		| QUEUE '(' STRING comma STRING ')'	{
3743			$$.qname = $3;
3744			$$.pqname = $5;
3745		}
3746		;
3747
3748no		: /* empty */			{ $$ = 0; }
3749		| NO				{ $$ = 1; }
3750		;
3751
3752portstar	: numberstring			{
3753			if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3754				free($1);
3755				YYERROR;
3756			}
3757			free($1);
3758		}
3759		;
3760
3761redirspec	: host				{ $$ = $1; }
3762		| '{' optnl redir_host_list '}'	{ $$ = $3; }
3763		;
3764
3765redir_host_list	: host optnl			{ $$ = $1; }
3766		| redir_host_list comma host optnl {
3767			$1->tail->next = $3;
3768			$1->tail = $3->tail;
3769			$$ = $1;
3770		}
3771		;
3772
3773redirpool	: /* empty */			{ $$ = NULL; }
3774		| ARROW redirspec		{
3775			$$ = calloc(1, sizeof(struct redirection));
3776			if ($$ == NULL)
3777				err(1, "redirection: calloc");
3778			$$->host = $2;
3779			$$->rport.a = $$->rport.b = $$->rport.t = 0;
3780		}
3781		| ARROW redirspec PORT portstar	{
3782			$$ = calloc(1, sizeof(struct redirection));
3783			if ($$ == NULL)
3784				err(1, "redirection: calloc");
3785			$$->host = $2;
3786			$$->rport = $4;
3787		}
3788		;
3789
3790hashkey		: /* empty */
3791		{
3792			$$ = calloc(1, sizeof(struct pf_poolhashkey));
3793			if ($$ == NULL)
3794				err(1, "hashkey: calloc");
3795			$$->key32[0] = arc4random();
3796			$$->key32[1] = arc4random();
3797			$$->key32[2] = arc4random();
3798			$$->key32[3] = arc4random();
3799		}
3800		| string
3801		{
3802			if (!strncmp($1, "0x", 2)) {
3803				if (strlen($1) != 34) {
3804					free($1);
3805					yyerror("hex key must be 128 bits "
3806						"(32 hex digits) long");
3807					YYERROR;
3808				}
3809				$$ = calloc(1, sizeof(struct pf_poolhashkey));
3810				if ($$ == NULL)
3811					err(1, "hashkey: calloc");
3812
3813				if (sscanf($1, "0x%8x%8x%8x%8x",
3814				    &$$->key32[0], &$$->key32[1],
3815				    &$$->key32[2], &$$->key32[3]) != 4) {
3816					free($$);
3817					free($1);
3818					yyerror("invalid hex key");
3819					YYERROR;
3820				}
3821			} else {
3822				MD5_CTX	context;
3823
3824				$$ = calloc(1, sizeof(struct pf_poolhashkey));
3825				if ($$ == NULL)
3826					err(1, "hashkey: calloc");
3827				MD5Init(&context);
3828				MD5Update(&context, (unsigned char *)$1,
3829				    strlen($1));
3830				MD5Final((unsigned char *)$$, &context);
3831				HTONL($$->key32[0]);
3832				HTONL($$->key32[1]);
3833				HTONL($$->key32[2]);
3834				HTONL($$->key32[3]);
3835			}
3836			free($1);
3837		}
3838		;
3839
3840pool_opts	:	{ bzero(&pool_opts, sizeof pool_opts); }
3841		    pool_opts_l
3842			{ $$ = pool_opts; }
3843		| /* empty */	{
3844			bzero(&pool_opts, sizeof pool_opts);
3845			$$ = pool_opts;
3846		}
3847		;
3848
3849pool_opts_l	: pool_opts_l pool_opt
3850		| pool_opt
3851		;
3852
3853pool_opt	: BITMASK	{
3854			if (pool_opts.type) {
3855				yyerror("pool type cannot be redefined");
3856				YYERROR;
3857			}
3858			pool_opts.type =  PF_POOL_BITMASK;
3859		}
3860		| RANDOM	{
3861			if (pool_opts.type) {
3862				yyerror("pool type cannot be redefined");
3863				YYERROR;
3864			}
3865			pool_opts.type = PF_POOL_RANDOM;
3866		}
3867		| SOURCEHASH hashkey {
3868			if (pool_opts.type) {
3869				yyerror("pool type cannot be redefined");
3870				YYERROR;
3871			}
3872			pool_opts.type = PF_POOL_SRCHASH;
3873			pool_opts.key = $2;
3874		}
3875		| ROUNDROBIN	{
3876			if (pool_opts.type) {
3877				yyerror("pool type cannot be redefined");
3878				YYERROR;
3879			}
3880			pool_opts.type = PF_POOL_ROUNDROBIN;
3881		}
3882		| STATICPORT	{
3883			if (pool_opts.staticport) {
3884				yyerror("static-port cannot be redefined");
3885				YYERROR;
3886			}
3887			pool_opts.staticport = 1;
3888		}
3889		| STICKYADDRESS	{
3890			if (filter_opts.marker & POM_STICKYADDRESS) {
3891				yyerror("sticky-address cannot be redefined");
3892				YYERROR;
3893			}
3894			pool_opts.marker |= POM_STICKYADDRESS;
3895			pool_opts.opts |= PF_POOL_STICKYADDR;
3896		}
3897		;
3898
3899redirection	: /* empty */			{ $$ = NULL; }
3900		| ARROW host			{
3901			$$ = calloc(1, sizeof(struct redirection));
3902			if ($$ == NULL)
3903				err(1, "redirection: calloc");
3904			$$->host = $2;
3905			$$->rport.a = $$->rport.b = $$->rport.t = 0;
3906		}
3907		| ARROW host PORT portstar	{
3908			$$ = calloc(1, sizeof(struct redirection));
3909			if ($$ == NULL)
3910				err(1, "redirection: calloc");
3911			$$->host = $2;
3912			$$->rport = $4;
3913		}
3914		;
3915
3916natpasslog	: /* empty */	{ $$.b1 = $$.b2 = 0; $$.w2 = 0; }
3917		| PASS		{ $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
3918		| PASS log	{ $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
3919		| log		{ $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
3920		;
3921
3922nataction	: no NAT natpasslog {
3923			if ($1 && $3.b1) {
3924				yyerror("\"pass\" not valid with \"no\"");
3925				YYERROR;
3926			}
3927			if ($1)
3928				$$.b1 = PF_NONAT;
3929			else
3930				$$.b1 = PF_NAT;
3931			$$.b2 = $3.b1;
3932			$$.w = $3.b2;
3933			$$.w2 = $3.w2;
3934		}
3935		| no RDR natpasslog {
3936			if ($1 && $3.b1) {
3937				yyerror("\"pass\" not valid with \"no\"");
3938				YYERROR;
3939			}
3940			if ($1)
3941				$$.b1 = PF_NORDR;
3942			else
3943				$$.b1 = PF_RDR;
3944			$$.b2 = $3.b1;
3945			$$.w = $3.b2;
3946			$$.w2 = $3.w2;
3947		}
3948		;
3949
3950natrule		: nataction interface af proto fromto tag tagged rtable
3951		    redirpool pool_opts
3952		{
3953			struct pf_rule	r;
3954
3955			if (check_rulestate(PFCTL_STATE_NAT))
3956				YYERROR;
3957
3958			memset(&r, 0, sizeof(r));
3959
3960			r.action = $1.b1;
3961			r.natpass = $1.b2;
3962			r.log = $1.w;
3963			r.logif = $1.w2;
3964			r.af = $3;
3965
3966			if (!r.af) {
3967				if ($5.src.host && $5.src.host->af &&
3968				    !$5.src.host->ifindex)
3969					r.af = $5.src.host->af;
3970				else if ($5.dst.host && $5.dst.host->af &&
3971				    !$5.dst.host->ifindex)
3972					r.af = $5.dst.host->af;
3973			}
3974
3975			if ($6 != NULL)
3976				if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
3977				    PF_TAG_NAME_SIZE) {
3978					yyerror("tag too long, max %u chars",
3979					    PF_TAG_NAME_SIZE - 1);
3980					YYERROR;
3981				}
3982
3983			if ($7.name)
3984				if (strlcpy(r.match_tagname, $7.name,
3985				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
3986					yyerror("tag too long, max %u chars",
3987					    PF_TAG_NAME_SIZE - 1);
3988					YYERROR;
3989				}
3990			r.match_tag_not = $7.neg;
3991			r.rtableid = $8;
3992
3993			if (r.action == PF_NONAT || r.action == PF_NORDR) {
3994				if ($9 != NULL) {
3995					yyerror("translation rule with 'no' "
3996					    "does not need '->'");
3997					YYERROR;
3998				}
3999			} else {
4000				if ($9 == NULL || $9->host == NULL) {
4001					yyerror("translation rule requires '-> "
4002					    "address'");
4003					YYERROR;
4004				}
4005				if (!r.af && ! $9->host->ifindex)
4006					r.af = $9->host->af;
4007
4008				remove_invalid_hosts(&$9->host, &r.af);
4009				if (invalid_redirect($9->host, r.af))
4010					YYERROR;
4011				if (check_netmask($9->host, r.af))
4012					YYERROR;
4013
4014				r.rpool.proxy_port[0] = ntohs($9->rport.a);
4015
4016				switch (r.action) {
4017				case PF_RDR:
4018					if (!$9->rport.b && $9->rport.t &&
4019					    $5.dst.port != NULL) {
4020						r.rpool.proxy_port[1] =
4021						    ntohs($9->rport.a) +
4022						    (ntohs(
4023						    $5.dst.port->port[1]) -
4024						    ntohs(
4025						    $5.dst.port->port[0]));
4026					} else
4027						r.rpool.proxy_port[1] =
4028						    ntohs($9->rport.b);
4029					break;
4030				case PF_NAT:
4031					r.rpool.proxy_port[1] =
4032					    ntohs($9->rport.b);
4033					if (!r.rpool.proxy_port[0] &&
4034					    !r.rpool.proxy_port[1]) {
4035						r.rpool.proxy_port[0] =
4036						    PF_NAT_PROXY_PORT_LOW;
4037						r.rpool.proxy_port[1] =
4038						    PF_NAT_PROXY_PORT_HIGH;
4039					} else if (!r.rpool.proxy_port[1])
4040						r.rpool.proxy_port[1] =
4041						    r.rpool.proxy_port[0];
4042					break;
4043				default:
4044					break;
4045				}
4046
4047				r.rpool.opts = $10.type;
4048				if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
4049				    PF_POOL_NONE && ($9->host->next != NULL ||
4050				    $9->host->addr.type == PF_ADDR_TABLE ||
4051				    DYNIF_MULTIADDR($9->host->addr)))
4052					r.rpool.opts = PF_POOL_ROUNDROBIN;
4053				if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4054				    PF_POOL_ROUNDROBIN &&
4055				    disallow_table($9->host, "tables are only "
4056				    "supported in round-robin redirection "
4057				    "pools"))
4058					YYERROR;
4059				if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4060				    PF_POOL_ROUNDROBIN &&
4061				    disallow_alias($9->host, "interface (%s) "
4062				    "is only supported in round-robin "
4063				    "redirection pools"))
4064					YYERROR;
4065				if ($9->host->next != NULL) {
4066					if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4067					    PF_POOL_ROUNDROBIN) {
4068						yyerror("only round-robin "
4069						    "valid for multiple "
4070						    "redirection addresses");
4071						YYERROR;
4072					}
4073				}
4074			}
4075
4076			if ($10.key != NULL)
4077				memcpy(&r.rpool.key, $10.key,
4078				    sizeof(struct pf_poolhashkey));
4079
4080			 if ($10.opts)
4081				r.rpool.opts |= $10.opts;
4082
4083			if ($10.staticport) {
4084				if (r.action != PF_NAT) {
4085					yyerror("the 'static-port' option is "
4086					    "only valid with nat rules");
4087					YYERROR;
4088				}
4089				if (r.rpool.proxy_port[0] !=
4090				    PF_NAT_PROXY_PORT_LOW &&
4091				    r.rpool.proxy_port[1] !=
4092				    PF_NAT_PROXY_PORT_HIGH) {
4093					yyerror("the 'static-port' option can't"
4094					    " be used when specifying a port"
4095					    " range");
4096					YYERROR;
4097				}
4098				r.rpool.proxy_port[0] = 0;
4099				r.rpool.proxy_port[1] = 0;
4100			}
4101
4102			expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
4103			    $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
4104			    $5.dst.port, 0, 0, 0, "");
4105			free($9);
4106		}
4107		;
4108
4109binatrule	: no BINAT natpasslog interface af proto FROM host toipspec tag
4110		    tagged rtable redirection
4111		{
4112			struct pf_rule		binat;
4113			struct pf_pooladdr	*pa;
4114
4115			if (check_rulestate(PFCTL_STATE_NAT))
4116				YYERROR;
4117			if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
4118			    "permitted as a binat destination"))
4119				YYERROR;
4120
4121			memset(&binat, 0, sizeof(binat));
4122
4123			if ($1 && $3.b1) {
4124				yyerror("\"pass\" not valid with \"no\"");
4125				YYERROR;
4126			}
4127			if ($1)
4128				binat.action = PF_NOBINAT;
4129			else
4130				binat.action = PF_BINAT;
4131			binat.natpass = $3.b1;
4132			binat.log = $3.b2;
4133			binat.logif = $3.w2;
4134			binat.af = $5;
4135			if (!binat.af && $8 != NULL && $8->af)
4136				binat.af = $8->af;
4137			if (!binat.af && $9 != NULL && $9->af)
4138				binat.af = $9->af;
4139
4140			if (!binat.af && $13 != NULL && $13->host)
4141				binat.af = $13->host->af;
4142			if (!binat.af) {
4143				yyerror("address family (inet/inet6) "
4144				    "undefined");
4145				YYERROR;
4146			}
4147
4148			if ($4 != NULL) {
4149				memcpy(binat.ifname, $4->ifname,
4150				    sizeof(binat.ifname));
4151				binat.ifnot = $4->not;
4152				free($4);
4153			}
4154
4155			if ($10 != NULL)
4156				if (strlcpy(binat.tagname, $10,
4157				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4158					yyerror("tag too long, max %u chars",
4159					    PF_TAG_NAME_SIZE - 1);
4160					YYERROR;
4161				}
4162			if ($11.name)
4163				if (strlcpy(binat.match_tagname, $11.name,
4164				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4165					yyerror("tag too long, max %u chars",
4166					    PF_TAG_NAME_SIZE - 1);
4167					YYERROR;
4168				}
4169			binat.match_tag_not = $11.neg;
4170			binat.rtableid = $12;
4171
4172			if ($6 != NULL) {
4173				binat.proto = $6->proto;
4174				free($6);
4175			}
4176
4177			if ($8 != NULL && disallow_table($8, "invalid use of "
4178			    "table <%s> as the source address of a binat rule"))
4179				YYERROR;
4180			if ($8 != NULL && disallow_alias($8, "invalid use of "
4181			    "interface (%s) as the source address of a binat "
4182			    "rule"))
4183				YYERROR;
4184			if ($13 != NULL && $13->host != NULL && disallow_table(
4185			    $13->host, "invalid use of table <%s> as the "
4186			    "redirect address of a binat rule"))
4187				YYERROR;
4188			if ($13 != NULL && $13->host != NULL && disallow_alias(
4189			    $13->host, "invalid use of interface (%s) as the "
4190			    "redirect address of a binat rule"))
4191				YYERROR;
4192
4193			if ($8 != NULL) {
4194				if ($8->next) {
4195					yyerror("multiple binat ip addresses");
4196					YYERROR;
4197				}
4198				if ($8->addr.type == PF_ADDR_DYNIFTL)
4199					$8->af = binat.af;
4200				if ($8->af != binat.af) {
4201					yyerror("binat ip versions must match");
4202					YYERROR;
4203				}
4204				if (check_netmask($8, binat.af))
4205					YYERROR;
4206				memcpy(&binat.src.addr, &$8->addr,
4207				    sizeof(binat.src.addr));
4208				free($8);
4209			}
4210			if ($9 != NULL) {
4211				if ($9->next) {
4212					yyerror("multiple binat ip addresses");
4213					YYERROR;
4214				}
4215				if ($9->af != binat.af && $9->af) {
4216					yyerror("binat ip versions must match");
4217					YYERROR;
4218				}
4219				if (check_netmask($9, binat.af))
4220					YYERROR;
4221				memcpy(&binat.dst.addr, &$9->addr,
4222				    sizeof(binat.dst.addr));
4223				binat.dst.neg = $9->not;
4224				free($9);
4225			}
4226
4227			if (binat.action == PF_NOBINAT) {
4228				if ($13 != NULL) {
4229					yyerror("'no binat' rule does not need"
4230					    " '->'");
4231					YYERROR;
4232				}
4233			} else {
4234				if ($13 == NULL || $13->host == NULL) {
4235					yyerror("'binat' rule requires"
4236					    " '-> address'");
4237					YYERROR;
4238				}
4239
4240				remove_invalid_hosts(&$13->host, &binat.af);
4241				if (invalid_redirect($13->host, binat.af))
4242					YYERROR;
4243				if ($13->host->next != NULL) {
4244					yyerror("binat rule must redirect to "
4245					    "a single address");
4246					YYERROR;
4247				}
4248				if (check_netmask($13->host, binat.af))
4249					YYERROR;
4250
4251				if (!PF_AZERO(&binat.src.addr.v.a.mask,
4252				    binat.af) &&
4253				    !PF_AEQ(&binat.src.addr.v.a.mask,
4254				    &$13->host->addr.v.a.mask, binat.af)) {
4255					yyerror("'binat' source mask and "
4256					    "redirect mask must be the same");
4257					YYERROR;
4258				}
4259
4260				TAILQ_INIT(&binat.rpool.list);
4261				pa = calloc(1, sizeof(struct pf_pooladdr));
4262				if (pa == NULL)
4263					err(1, "binat: calloc");
4264				pa->addr = $13->host->addr;
4265				pa->ifname[0] = 0;
4266				TAILQ_INSERT_TAIL(&binat.rpool.list,
4267				    pa, entries);
4268
4269				free($13);
4270			}
4271
4272			pfctl_add_rule(pf, &binat, "");
4273		}
4274		;
4275
4276tag		: /* empty */		{ $$ = NULL; }
4277		| TAG STRING		{ $$ = $2; }
4278		;
4279
4280tagged		: /* empty */		{ $$.neg = 0; $$.name = NULL; }
4281		| not TAGGED string	{ $$.neg = $1; $$.name = $3; }
4282		;
4283
4284rtable		: /* empty */		{ $$ = -1; }
4285		| RTABLE NUMBER		{
4286			if ($2 < 0 || $2 > rt_tableid_max()) {
4287				yyerror("invalid rtable id");
4288				YYERROR;
4289			}
4290			$$ = $2;
4291		}
4292		;
4293
4294route_host	: STRING			{
4295			$$ = calloc(1, sizeof(struct node_host));
4296			if ($$ == NULL)
4297				err(1, "route_host: calloc");
4298			$$->ifname = $1;
4299			set_ipmask($$, 128);
4300			$$->next = NULL;
4301			$$->tail = $$;
4302		}
4303		| '(' STRING host ')'		{
4304			$$ = $3;
4305			$$->ifname = $2;
4306		}
4307		;
4308
4309route_host_list	: route_host optnl			{ $$ = $1; }
4310		| route_host_list comma route_host optnl {
4311			if ($1->af == 0)
4312				$1->af = $3->af;
4313			if ($1->af != $3->af) {
4314				yyerror("all pool addresses must be in the "
4315				    "same address family");
4316				YYERROR;
4317			}
4318			$1->tail->next = $3;
4319			$1->tail = $3->tail;
4320			$$ = $1;
4321		}
4322		;
4323
4324routespec	: route_host			{ $$ = $1; }
4325		| '{' optnl route_host_list '}'	{ $$ = $3; }
4326		;
4327
4328route		: /* empty */			{
4329			$$.host = NULL;
4330			$$.rt = 0;
4331			$$.pool_opts = 0;
4332		}
4333		| FASTROUTE {
4334			$$.host = NULL;
4335			$$.rt = PF_FASTROUTE;
4336			$$.pool_opts = 0;
4337		}
4338		| ROUTETO routespec pool_opts {
4339			$$.host = $2;
4340			$$.rt = PF_ROUTETO;
4341			$$.pool_opts = $3.type | $3.opts;
4342			if ($3.key != NULL)
4343				$$.key = $3.key;
4344		}
4345		| REPLYTO routespec pool_opts {
4346			$$.host = $2;
4347			$$.rt = PF_REPLYTO;
4348			$$.pool_opts = $3.type | $3.opts;
4349			if ($3.key != NULL)
4350				$$.key = $3.key;
4351		}
4352		| DUPTO routespec pool_opts {
4353			$$.host = $2;
4354			$$.rt = PF_DUPTO;
4355			$$.pool_opts = $3.type | $3.opts;
4356			if ($3.key != NULL)
4357				$$.key = $3.key;
4358		}
4359		;
4360
4361timeout_spec	: STRING NUMBER
4362		{
4363			if (check_rulestate(PFCTL_STATE_OPTION)) {
4364				free($1);
4365				YYERROR;
4366			}
4367			if ($2 < 0 || $2 > UINT_MAX) {
4368				yyerror("only positive values permitted");
4369				YYERROR;
4370			}
4371			if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
4372				yyerror("unknown timeout %s", $1);
4373				free($1);
4374				YYERROR;
4375			}
4376			free($1);
4377		}
4378		;
4379
4380timeout_list	: timeout_list comma timeout_spec optnl
4381		| timeout_spec optnl
4382		;
4383
4384limit_spec	: STRING NUMBER
4385		{
4386			if (check_rulestate(PFCTL_STATE_OPTION)) {
4387				free($1);
4388				YYERROR;
4389			}
4390			if ($2 < 0 || $2 > UINT_MAX) {
4391				yyerror("only positive values permitted");
4392				YYERROR;
4393			}
4394			if (pfctl_set_limit(pf, $1, $2) != 0) {
4395				yyerror("unable to set limit %s %u", $1, $2);
4396				free($1);
4397				YYERROR;
4398			}
4399			free($1);
4400		}
4401		;
4402
4403limit_list	: limit_list comma limit_spec optnl
4404		| limit_spec optnl
4405		;
4406
4407comma		: ','
4408		| /* empty */
4409		;
4410
4411yesno		: NO			{ $$ = 0; }
4412		| STRING		{
4413			if (!strcmp($1, "yes"))
4414				$$ = 1;
4415			else {
4416				yyerror("invalid value '%s', expected 'yes' "
4417				    "or 'no'", $1);
4418				free($1);
4419				YYERROR;
4420			}
4421			free($1);
4422		}
4423		;
4424
4425unaryop		: '='		{ $$ = PF_OP_EQ; }
4426		| '!' '='	{ $$ = PF_OP_NE; }
4427		| '<' '='	{ $$ = PF_OP_LE; }
4428		| '<'		{ $$ = PF_OP_LT; }
4429		| '>' '='	{ $$ = PF_OP_GE; }
4430		| '>'		{ $$ = PF_OP_GT; }
4431		;
4432
4433%%
4434
4435int
4436yyerror(const char *fmt, ...)
4437{
4438	va_list		 ap;
4439
4440	file->errors++;
4441	va_start(ap, fmt);
4442	fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4443	vfprintf(stderr, fmt, ap);
4444	fprintf(stderr, "\n");
4445	va_end(ap);
4446	return (0);
4447}
4448
4449int
4450disallow_table(struct node_host *h, const char *fmt)
4451{
4452	for (; h != NULL; h = h->next)
4453		if (h->addr.type == PF_ADDR_TABLE) {
4454			yyerror(fmt, h->addr.v.tblname);
4455			return (1);
4456		}
4457	return (0);
4458}
4459
4460int
4461disallow_urpf_failed(struct node_host *h, const char *fmt)
4462{
4463	for (; h != NULL; h = h->next)
4464		if (h->addr.type == PF_ADDR_URPFFAILED) {
4465			yyerror(fmt);
4466			return (1);
4467		}
4468	return (0);
4469}
4470
4471int
4472disallow_alias(struct node_host *h, const char *fmt)
4473{
4474	for (; h != NULL; h = h->next)
4475		if (DYNIF_MULTIADDR(h->addr)) {
4476			yyerror(fmt, h->addr.v.tblname);
4477			return (1);
4478		}
4479	return (0);
4480}
4481
4482int
4483rule_consistent(struct pf_rule *r, int anchor_call)
4484{
4485	int	problems = 0;
4486
4487	switch (r->action) {
4488	case PF_PASS:
4489	case PF_DROP:
4490	case PF_SCRUB:
4491	case PF_NOSCRUB:
4492		problems = filter_consistent(r, anchor_call);
4493		break;
4494	case PF_NAT:
4495	case PF_NONAT:
4496		problems = nat_consistent(r);
4497		break;
4498	case PF_RDR:
4499	case PF_NORDR:
4500		problems = rdr_consistent(r);
4501		break;
4502	case PF_BINAT:
4503	case PF_NOBINAT:
4504	default:
4505		break;
4506	}
4507	return (problems);
4508}
4509
4510int
4511filter_consistent(struct pf_rule *r, int anchor_call)
4512{
4513	int	problems = 0;
4514
4515	if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4516	    (r->src.port_op || r->dst.port_op)) {
4517		yyerror("port only applies to tcp/udp");
4518		problems++;
4519	}
4520	if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4521	    (r->type || r->code)) {
4522		yyerror("icmp-type/code only applies to icmp");
4523		problems++;
4524	}
4525	if (!r->af && (r->type || r->code)) {
4526		yyerror("must indicate address family with icmp-type/code");
4527		problems++;
4528	}
4529	if (r->overload_tblname[0] &&
4530	    r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4531		yyerror("'overload' requires 'max-src-conn' "
4532		    "or 'max-src-conn-rate'");
4533		problems++;
4534	}
4535	if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4536	    (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4537		yyerror("proto %s doesn't match address family %s",
4538		    r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4539		    r->af == AF_INET ? "inet" : "inet6");
4540		problems++;
4541	}
4542	if (r->allow_opts && r->action != PF_PASS) {
4543		yyerror("allow-opts can only be specified for pass rules");
4544		problems++;
4545	}
4546	if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4547	    r->dst.port_op || r->flagset || r->type || r->code)) {
4548		yyerror("fragments can be filtered only on IP header fields");
4549		problems++;
4550	}
4551	if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4552		yyerror("return-rst can only be applied to TCP rules");
4553		problems++;
4554	}
4555	if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4556		yyerror("max-src-nodes requires 'source-track rule'");
4557		problems++;
4558	}
4559	if (r->action == PF_DROP && r->keep_state) {
4560		yyerror("keep state on block rules doesn't make sense");
4561		problems++;
4562	}
4563	if (r->rule_flag & PFRULE_STATESLOPPY &&
4564	    (r->keep_state == PF_STATE_MODULATE ||
4565	    r->keep_state == PF_STATE_SYNPROXY)) {
4566		yyerror("sloppy state matching cannot be used with "
4567		    "synproxy state or modulate state");
4568		problems++;
4569	}
4570	return (-problems);
4571}
4572
4573int
4574nat_consistent(struct pf_rule *r)
4575{
4576	return (0);	/* yeah! */
4577}
4578
4579int
4580rdr_consistent(struct pf_rule *r)
4581{
4582	int			 problems = 0;
4583
4584	if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
4585		if (r->src.port_op) {
4586			yyerror("src port only applies to tcp/udp");
4587			problems++;
4588		}
4589		if (r->dst.port_op) {
4590			yyerror("dst port only applies to tcp/udp");
4591			problems++;
4592		}
4593		if (r->rpool.proxy_port[0]) {
4594			yyerror("rpool port only applies to tcp/udp");
4595			problems++;
4596		}
4597	}
4598	if (r->dst.port_op &&
4599	    r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
4600		yyerror("invalid port operator for rdr destination port");
4601		problems++;
4602	}
4603	return (-problems);
4604}
4605
4606int
4607process_tabledef(char *name, struct table_opts *opts)
4608{
4609	struct pfr_buffer	 ab;
4610	struct node_tinit	*ti;
4611
4612	bzero(&ab, sizeof(ab));
4613	ab.pfrb_type = PFRB_ADDRS;
4614	SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4615		if (ti->file)
4616			if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
4617				if (errno)
4618					yyerror("cannot load \"%s\": %s",
4619					    ti->file, strerror(errno));
4620				else
4621					yyerror("file \"%s\" contains bad data",
4622					    ti->file);
4623				goto _error;
4624			}
4625		if (ti->host)
4626			if (append_addr_host(&ab, ti->host, 0, 0)) {
4627				yyerror("cannot create address buffer: %s",
4628				    strerror(errno));
4629				goto _error;
4630			}
4631	}
4632	if (pf->opts & PF_OPT_VERBOSE)
4633		print_tabledef(name, opts->flags, opts->init_addr,
4634		    &opts->init_nodes);
4635	if (!(pf->opts & PF_OPT_NOACTION) &&
4636	    pfctl_define_table(name, opts->flags, opts->init_addr,
4637	    pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4638		yyerror("cannot define table %s: %s", name,
4639		    pfr_strerror(errno));
4640		goto _error;
4641	}
4642	pf->tdirty = 1;
4643	pfr_buf_clear(&ab);
4644	return (0);
4645_error:
4646	pfr_buf_clear(&ab);
4647	return (-1);
4648}
4649
4650struct keywords {
4651	const char	*k_name;
4652	int		 k_val;
4653};
4654
4655/* macro gore, but you should've seen the prior indentation nightmare... */
4656
4657#define FREE_LIST(T,r) \
4658	do { \
4659		T *p, *node = r; \
4660		while (node != NULL) { \
4661			p = node; \
4662			node = node->next; \
4663			free(p); \
4664		} \
4665	} while (0)
4666
4667#define LOOP_THROUGH(T,n,r,C) \
4668	do { \
4669		T *n; \
4670		if (r == NULL) { \
4671			r = calloc(1, sizeof(T)); \
4672			if (r == NULL) \
4673				err(1, "LOOP: calloc"); \
4674			r->next = NULL; \
4675		} \
4676		n = r; \
4677		while (n != NULL) { \
4678			do { \
4679				C; \
4680			} while (0); \
4681			n = n->next; \
4682		} \
4683	} while (0)
4684
4685void
4686expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4687{
4688	char *tmp;
4689	char *p, *q;
4690
4691	if ((tmp = calloc(1, len)) == NULL)
4692		err(1, "expand_label_str: calloc");
4693	p = q = label;
4694	while ((q = strstr(p, srch)) != NULL) {
4695		*q = '\0';
4696		if ((strlcat(tmp, p, len) >= len) ||
4697		    (strlcat(tmp, repl, len) >= len))
4698			errx(1, "expand_label: label too long");
4699		q += strlen(srch);
4700		p = q;
4701	}
4702	if (strlcat(tmp, p, len) >= len)
4703		errx(1, "expand_label: label too long");
4704	strlcpy(label, tmp, len);	/* always fits */
4705	free(tmp);
4706}
4707
4708void
4709expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4710{
4711	if (strstr(label, name) != NULL) {
4712		if (!*ifname)
4713			expand_label_str(label, len, name, "any");
4714		else
4715			expand_label_str(label, len, name, ifname);
4716	}
4717}
4718
4719void
4720expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
4721    struct node_host *h)
4722{
4723	char tmp[64], tmp_not[66];
4724
4725	if (strstr(label, name) != NULL) {
4726		switch (h->addr.type) {
4727		case PF_ADDR_DYNIFTL:
4728			snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
4729			break;
4730		case PF_ADDR_TABLE:
4731			snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
4732			break;
4733		case PF_ADDR_NOROUTE:
4734			snprintf(tmp, sizeof(tmp), "no-route");
4735			break;
4736		case PF_ADDR_URPFFAILED:
4737			snprintf(tmp, sizeof(tmp), "urpf-failed");
4738			break;
4739		case PF_ADDR_ADDRMASK:
4740			if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
4741			    PF_AZERO(&h->addr.v.a.mask, af)))
4742				snprintf(tmp, sizeof(tmp), "any");
4743			else {
4744				char	a[48];
4745				int	bits;
4746
4747				if (inet_ntop(af, &h->addr.v.a.addr, a,
4748				    sizeof(a)) == NULL)
4749					snprintf(tmp, sizeof(tmp), "?");
4750				else {
4751					bits = unmask(&h->addr.v.a.mask, af);
4752					if ((af == AF_INET && bits < 32) ||
4753					    (af == AF_INET6 && bits < 128))
4754						snprintf(tmp, sizeof(tmp),
4755						    "%s/%d", a, bits);
4756					else
4757						snprintf(tmp, sizeof(tmp),
4758						    "%s", a);
4759				}
4760			}
4761			break;
4762		default:
4763			snprintf(tmp, sizeof(tmp), "?");
4764			break;
4765		}
4766
4767		if (h->not) {
4768			snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
4769			expand_label_str(label, len, name, tmp_not);
4770		} else
4771			expand_label_str(label, len, name, tmp);
4772	}
4773}
4774
4775void
4776expand_label_port(const char *name, char *label, size_t len,
4777    struct node_port *port)
4778{
4779	char	 a1[6], a2[6], op[13] = "";
4780
4781	if (strstr(label, name) != NULL) {
4782		snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
4783		snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
4784		if (!port->op)
4785			;
4786		else if (port->op == PF_OP_IRG)
4787			snprintf(op, sizeof(op), "%s><%s", a1, a2);
4788		else if (port->op == PF_OP_XRG)
4789			snprintf(op, sizeof(op), "%s<>%s", a1, a2);
4790		else if (port->op == PF_OP_EQ)
4791			snprintf(op, sizeof(op), "%s", a1);
4792		else if (port->op == PF_OP_NE)
4793			snprintf(op, sizeof(op), "!=%s", a1);
4794		else if (port->op == PF_OP_LT)
4795			snprintf(op, sizeof(op), "<%s", a1);
4796		else if (port->op == PF_OP_LE)
4797			snprintf(op, sizeof(op), "<=%s", a1);
4798		else if (port->op == PF_OP_GT)
4799			snprintf(op, sizeof(op), ">%s", a1);
4800		else if (port->op == PF_OP_GE)
4801			snprintf(op, sizeof(op), ">=%s", a1);
4802		expand_label_str(label, len, name, op);
4803	}
4804}
4805
4806void
4807expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
4808{
4809	struct protoent *pe;
4810	char n[4];
4811
4812	if (strstr(label, name) != NULL) {
4813		pe = getprotobynumber(proto);
4814		if (pe != NULL)
4815			expand_label_str(label, len, name, pe->p_name);
4816		else {
4817			snprintf(n, sizeof(n), "%u", proto);
4818			expand_label_str(label, len, name, n);
4819		}
4820	}
4821}
4822
4823void
4824expand_label_nr(const char *name, char *label, size_t len)
4825{
4826	char n[11];
4827
4828	if (strstr(label, name) != NULL) {
4829		snprintf(n, sizeof(n), "%u", pf->anchor->match);
4830		expand_label_str(label, len, name, n);
4831	}
4832}
4833
4834void
4835expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
4836    struct node_host *src_host, struct node_port *src_port,
4837    struct node_host *dst_host, struct node_port *dst_port,
4838    u_int8_t proto)
4839{
4840	expand_label_if("$if", label, len, ifname);
4841	expand_label_addr("$srcaddr", label, len, af, src_host);
4842	expand_label_addr("$dstaddr", label, len, af, dst_host);
4843	expand_label_port("$srcport", label, len, src_port);
4844	expand_label_port("$dstport", label, len, dst_port);
4845	expand_label_proto("$proto", label, len, proto);
4846	expand_label_nr("$nr", label, len);
4847}
4848
4849int
4850expand_altq(struct pf_altq *a, struct node_if *interfaces,
4851    struct node_queue *nqueues, struct node_queue_bw bwspec,
4852    struct node_queue_opt *opts)
4853{
4854	struct pf_altq		 pa, pb;
4855	char			 qname[PF_QNAME_SIZE];
4856	struct node_queue	*n;
4857	struct node_queue_bw	 bw;
4858	int			 errs = 0;
4859
4860	if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4861		FREE_LIST(struct node_if, interfaces);
4862		if (nqueues)
4863			FREE_LIST(struct node_queue, nqueues);
4864		return (0);
4865	}
4866
4867	LOOP_THROUGH(struct node_if, interface, interfaces,
4868		memcpy(&pa, a, sizeof(struct pf_altq));
4869		if (strlcpy(pa.ifname, interface->ifname,
4870		    sizeof(pa.ifname)) >= sizeof(pa.ifname))
4871			errx(1, "expand_altq: strlcpy");
4872
4873		if (interface->not) {
4874			yyerror("altq on ! <interface> is not supported");
4875			errs++;
4876		} else {
4877			if (eval_pfaltq(pf, &pa, &bwspec, opts))
4878				errs++;
4879			else
4880				if (pfctl_add_altq(pf, &pa))
4881					errs++;
4882
4883			if (pf->opts & PF_OPT_VERBOSE) {
4884				print_altq(&pf->paltq->altq, 0,
4885				    &bwspec, opts);
4886				if (nqueues && nqueues->tail) {
4887					printf("queue { ");
4888					LOOP_THROUGH(struct node_queue, queue,
4889					    nqueues,
4890						printf("%s ",
4891						    queue->queue);
4892					);
4893					printf("}");
4894				}
4895				printf("\n");
4896			}
4897
4898			if (pa.scheduler == ALTQT_CBQ ||
4899			    pa.scheduler == ALTQT_HFSC) {
4900				/* now create a root queue */
4901				memset(&pb, 0, sizeof(struct pf_altq));
4902				if (strlcpy(qname, "root_", sizeof(qname)) >=
4903				    sizeof(qname))
4904					errx(1, "expand_altq: strlcpy");
4905				if (strlcat(qname, interface->ifname,
4906				    sizeof(qname)) >= sizeof(qname))
4907					errx(1, "expand_altq: strlcat");
4908				if (strlcpy(pb.qname, qname,
4909				    sizeof(pb.qname)) >= sizeof(pb.qname))
4910					errx(1, "expand_altq: strlcpy");
4911				if (strlcpy(pb.ifname, interface->ifname,
4912				    sizeof(pb.ifname)) >= sizeof(pb.ifname))
4913					errx(1, "expand_altq: strlcpy");
4914				pb.qlimit = pa.qlimit;
4915				pb.scheduler = pa.scheduler;
4916				bw.bw_absolute = pa.ifbandwidth;
4917				bw.bw_percent = 0;
4918				if (eval_pfqueue(pf, &pb, &bw, opts))
4919					errs++;
4920				else
4921					if (pfctl_add_altq(pf, &pb))
4922						errs++;
4923			}
4924
4925			LOOP_THROUGH(struct node_queue, queue, nqueues,
4926				n = calloc(1, sizeof(struct node_queue));
4927				if (n == NULL)
4928					err(1, "expand_altq: calloc");
4929				if (pa.scheduler == ALTQT_CBQ ||
4930				    pa.scheduler == ALTQT_HFSC)
4931					if (strlcpy(n->parent, qname,
4932					    sizeof(n->parent)) >=
4933					    sizeof(n->parent))
4934						errx(1, "expand_altq: strlcpy");
4935				if (strlcpy(n->queue, queue->queue,
4936				    sizeof(n->queue)) >= sizeof(n->queue))
4937					errx(1, "expand_altq: strlcpy");
4938				if (strlcpy(n->ifname, interface->ifname,
4939				    sizeof(n->ifname)) >= sizeof(n->ifname))
4940					errx(1, "expand_altq: strlcpy");
4941				n->scheduler = pa.scheduler;
4942				n->next = NULL;
4943				n->tail = n;
4944				if (queues == NULL)
4945					queues = n;
4946				else {
4947					queues->tail->next = n;
4948					queues->tail = n;
4949				}
4950			);
4951		}
4952	);
4953	FREE_LIST(struct node_if, interfaces);
4954	if (nqueues)
4955		FREE_LIST(struct node_queue, nqueues);
4956
4957	return (errs);
4958}
4959
4960int
4961expand_queue(struct pf_altq *a, struct node_if *interfaces,
4962    struct node_queue *nqueues, struct node_queue_bw bwspec,
4963    struct node_queue_opt *opts)
4964{
4965	struct node_queue	*n, *nq;
4966	struct pf_altq		 pa;
4967	u_int8_t		 found = 0;
4968	u_int8_t		 errs = 0;
4969
4970	if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4971		FREE_LIST(struct node_queue, nqueues);
4972		return (0);
4973	}
4974
4975	if (queues == NULL) {
4976		yyerror("queue %s has no parent", a->qname);
4977		FREE_LIST(struct node_queue, nqueues);
4978		return (1);
4979	}
4980
4981	LOOP_THROUGH(struct node_if, interface, interfaces,
4982		LOOP_THROUGH(struct node_queue, tqueue, queues,
4983			if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
4984			    (interface->ifname[0] == 0 ||
4985			    (!interface->not && !strncmp(interface->ifname,
4986			    tqueue->ifname, IFNAMSIZ)) ||
4987			    (interface->not && strncmp(interface->ifname,
4988			    tqueue->ifname, IFNAMSIZ)))) {
4989				/* found ourself in queues */
4990				found++;
4991
4992				memcpy(&pa, a, sizeof(struct pf_altq));
4993
4994				if (pa.scheduler != ALTQT_NONE &&
4995				    pa.scheduler != tqueue->scheduler) {
4996					yyerror("exactly one scheduler type "
4997					    "per interface allowed");
4998					return (1);
4999				}
5000				pa.scheduler = tqueue->scheduler;
5001
5002				/* scheduler dependent error checking */
5003				switch (pa.scheduler) {
5004				case ALTQT_PRIQ:
5005					if (nqueues != NULL) {
5006						yyerror("priq queues cannot "
5007						    "have child queues");
5008						return (1);
5009					}
5010					if (bwspec.bw_absolute > 0 ||
5011					    bwspec.bw_percent < 100) {
5012						yyerror("priq doesn't take "
5013						    "bandwidth");
5014						return (1);
5015					}
5016					break;
5017				default:
5018					break;
5019				}
5020
5021				if (strlcpy(pa.ifname, tqueue->ifname,
5022				    sizeof(pa.ifname)) >= sizeof(pa.ifname))
5023					errx(1, "expand_queue: strlcpy");
5024				if (strlcpy(pa.parent, tqueue->parent,
5025				    sizeof(pa.parent)) >= sizeof(pa.parent))
5026					errx(1, "expand_queue: strlcpy");
5027
5028				if (eval_pfqueue(pf, &pa, &bwspec, opts))
5029					errs++;
5030				else
5031					if (pfctl_add_altq(pf, &pa))
5032						errs++;
5033
5034				for (nq = nqueues; nq != NULL; nq = nq->next) {
5035					if (!strcmp(a->qname, nq->queue)) {
5036						yyerror("queue cannot have "
5037						    "itself as child");
5038						errs++;
5039						continue;
5040					}
5041					n = calloc(1,
5042					    sizeof(struct node_queue));
5043					if (n == NULL)
5044						err(1, "expand_queue: calloc");
5045					if (strlcpy(n->parent, a->qname,
5046					    sizeof(n->parent)) >=
5047					    sizeof(n->parent))
5048						errx(1, "expand_queue strlcpy");
5049					if (strlcpy(n->queue, nq->queue,
5050					    sizeof(n->queue)) >=
5051					    sizeof(n->queue))
5052						errx(1, "expand_queue strlcpy");
5053					if (strlcpy(n->ifname, tqueue->ifname,
5054					    sizeof(n->ifname)) >=
5055					    sizeof(n->ifname))
5056						errx(1, "expand_queue strlcpy");
5057					n->scheduler = tqueue->scheduler;
5058					n->next = NULL;
5059					n->tail = n;
5060					if (queues == NULL)
5061						queues = n;
5062					else {
5063						queues->tail->next = n;
5064						queues->tail = n;
5065					}
5066				}
5067				if ((pf->opts & PF_OPT_VERBOSE) && (
5068				    (found == 1 && interface->ifname[0] == 0) ||
5069				    (found > 0 && interface->ifname[0] != 0))) {
5070					print_queue(&pf->paltq->altq, 0,
5071					    &bwspec, interface->ifname[0] != 0,
5072					    opts);
5073					if (nqueues && nqueues->tail) {
5074						printf("{ ");
5075						LOOP_THROUGH(struct node_queue,
5076						    queue, nqueues,
5077							printf("%s ",
5078							    queue->queue);
5079						);
5080						printf("}");
5081					}
5082					printf("\n");
5083				}
5084			}
5085		);
5086	);
5087
5088	FREE_LIST(struct node_queue, nqueues);
5089	FREE_LIST(struct node_if, interfaces);
5090
5091	if (!found) {
5092		yyerror("queue %s has no parent", a->qname);
5093		errs++;
5094	}
5095
5096	if (errs)
5097		return (1);
5098	else
5099		return (0);
5100}
5101
5102void
5103expand_rule(struct pf_rule *r,
5104    struct node_if *interfaces, struct node_host *rpool_hosts,
5105    struct node_proto *protos, struct node_os *src_oses,
5106    struct node_host *src_hosts, struct node_port *src_ports,
5107    struct node_host *dst_hosts, struct node_port *dst_ports,
5108    struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types,
5109    const char *anchor_call)
5110{
5111	sa_family_t		 af = r->af;
5112	int			 added = 0, error = 0;
5113	char			 ifname[IF_NAMESIZE];
5114	char			 label[PF_RULE_LABEL_SIZE];
5115	char			 tagname[PF_TAG_NAME_SIZE];
5116	char			 match_tagname[PF_TAG_NAME_SIZE];
5117	struct pf_pooladdr	*pa;
5118	struct node_host	*h;
5119	u_int8_t		 flags, flagset, keep_state;
5120
5121	if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
5122		errx(1, "expand_rule: strlcpy");
5123	if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
5124		errx(1, "expand_rule: strlcpy");
5125	if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
5126	    sizeof(match_tagname))
5127		errx(1, "expand_rule: strlcpy");
5128	flags = r->flags;
5129	flagset = r->flagset;
5130	keep_state = r->keep_state;
5131
5132	LOOP_THROUGH(struct node_if, interface, interfaces,
5133	LOOP_THROUGH(struct node_proto, proto, protos,
5134	LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
5135	LOOP_THROUGH(struct node_host, src_host, src_hosts,
5136	LOOP_THROUGH(struct node_port, src_port, src_ports,
5137	LOOP_THROUGH(struct node_os, src_os, src_oses,
5138	LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
5139	LOOP_THROUGH(struct node_port, dst_port, dst_ports,
5140	LOOP_THROUGH(struct node_uid, uid, uids,
5141	LOOP_THROUGH(struct node_gid, gid, gids,
5142
5143		r->af = af;
5144		/* for link-local IPv6 address, interface must match up */
5145		if ((r->af && src_host->af && r->af != src_host->af) ||
5146		    (r->af && dst_host->af && r->af != dst_host->af) ||
5147		    (src_host->af && dst_host->af &&
5148		    src_host->af != dst_host->af) ||
5149		    (src_host->ifindex && dst_host->ifindex &&
5150		    src_host->ifindex != dst_host->ifindex) ||
5151		    (src_host->ifindex && *interface->ifname &&
5152		    src_host->ifindex != if_nametoindex(interface->ifname)) ||
5153		    (dst_host->ifindex && *interface->ifname &&
5154		    dst_host->ifindex != if_nametoindex(interface->ifname)))
5155			continue;
5156		if (!r->af && src_host->af)
5157			r->af = src_host->af;
5158		else if (!r->af && dst_host->af)
5159			r->af = dst_host->af;
5160
5161		if (*interface->ifname)
5162			strlcpy(r->ifname, interface->ifname,
5163			    sizeof(r->ifname));
5164		else if (if_indextoname(src_host->ifindex, ifname))
5165			strlcpy(r->ifname, ifname, sizeof(r->ifname));
5166		else if (if_indextoname(dst_host->ifindex, ifname))
5167			strlcpy(r->ifname, ifname, sizeof(r->ifname));
5168		else
5169			memset(r->ifname, '\0', sizeof(r->ifname));
5170
5171		if (strlcpy(r->label, label, sizeof(r->label)) >=
5172		    sizeof(r->label))
5173			errx(1, "expand_rule: strlcpy");
5174		if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
5175		    sizeof(r->tagname))
5176			errx(1, "expand_rule: strlcpy");
5177		if (strlcpy(r->match_tagname, match_tagname,
5178		    sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
5179			errx(1, "expand_rule: strlcpy");
5180		expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
5181		    src_host, src_port, dst_host, dst_port, proto->proto);
5182		expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
5183		    src_host, src_port, dst_host, dst_port, proto->proto);
5184		expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
5185		    r->af, src_host, src_port, dst_host, dst_port,
5186		    proto->proto);
5187
5188		error += check_netmask(src_host, r->af);
5189		error += check_netmask(dst_host, r->af);
5190
5191		r->ifnot = interface->not;
5192		r->proto = proto->proto;
5193		r->src.addr = src_host->addr;
5194		r->src.neg = src_host->not;
5195		r->src.port[0] = src_port->port[0];
5196		r->src.port[1] = src_port->port[1];
5197		r->src.port_op = src_port->op;
5198		r->dst.addr = dst_host->addr;
5199		r->dst.neg = dst_host->not;
5200		r->dst.port[0] = dst_port->port[0];
5201		r->dst.port[1] = dst_port->port[1];
5202		r->dst.port_op = dst_port->op;
5203		r->uid.op = uid->op;
5204		r->uid.uid[0] = uid->uid[0];
5205		r->uid.uid[1] = uid->uid[1];
5206		r->gid.op = gid->op;
5207		r->gid.gid[0] = gid->gid[0];
5208		r->gid.gid[1] = gid->gid[1];
5209		r->type = icmp_type->type;
5210		r->code = icmp_type->code;
5211
5212		if ((keep_state == PF_STATE_MODULATE ||
5213		    keep_state == PF_STATE_SYNPROXY) &&
5214		    r->proto && r->proto != IPPROTO_TCP)
5215			r->keep_state = PF_STATE_NORMAL;
5216		else
5217			r->keep_state = keep_state;
5218
5219		if (r->proto && r->proto != IPPROTO_TCP) {
5220			r->flags = 0;
5221			r->flagset = 0;
5222		} else {
5223			r->flags = flags;
5224			r->flagset = flagset;
5225		}
5226		if (icmp_type->proto && r->proto != icmp_type->proto) {
5227			yyerror("icmp-type mismatch");
5228			error++;
5229		}
5230
5231		if (src_os && src_os->os) {
5232			r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5233			if ((pf->opts & PF_OPT_VERBOSE2) &&
5234			    r->os_fingerprint == PF_OSFP_NOMATCH)
5235				fprintf(stderr,
5236				    "warning: unknown '%s' OS fingerprint\n",
5237				    src_os->os);
5238		} else {
5239			r->os_fingerprint = PF_OSFP_ANY;
5240		}
5241
5242		TAILQ_INIT(&r->rpool.list);
5243		for (h = rpool_hosts; h != NULL; h = h->next) {
5244			pa = calloc(1, sizeof(struct pf_pooladdr));
5245			if (pa == NULL)
5246				err(1, "expand_rule: calloc");
5247			pa->addr = h->addr;
5248			if (h->ifname != NULL) {
5249				if (strlcpy(pa->ifname, h->ifname,
5250				    sizeof(pa->ifname)) >=
5251				    sizeof(pa->ifname))
5252					errx(1, "expand_rule: strlcpy");
5253			} else
5254				pa->ifname[0] = 0;
5255			TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
5256		}
5257
5258		if (rule_consistent(r, anchor_call[0]) < 0 || error)
5259			yyerror("skipping rule due to errors");
5260		else {
5261			r->nr = pf->astack[pf->asd]->match++;
5262			pfctl_add_rule(pf, r, anchor_call);
5263			added++;
5264		}
5265
5266	))))))))));
5267
5268	FREE_LIST(struct node_if, interfaces);
5269	FREE_LIST(struct node_proto, protos);
5270	FREE_LIST(struct node_host, src_hosts);
5271	FREE_LIST(struct node_port, src_ports);
5272	FREE_LIST(struct node_os, src_oses);
5273	FREE_LIST(struct node_host, dst_hosts);
5274	FREE_LIST(struct node_port, dst_ports);
5275	FREE_LIST(struct node_uid, uids);
5276	FREE_LIST(struct node_gid, gids);
5277	FREE_LIST(struct node_icmp, icmp_types);
5278	FREE_LIST(struct node_host, rpool_hosts);
5279
5280	if (!added)
5281		yyerror("rule expands to no valid combination");
5282}
5283
5284int
5285expand_skip_interface(struct node_if *interfaces)
5286{
5287	int	errs = 0;
5288
5289	if (!interfaces || (!interfaces->next && !interfaces->not &&
5290	    !strcmp(interfaces->ifname, "none"))) {
5291		if (pf->opts & PF_OPT_VERBOSE)
5292			printf("set skip on none\n");
5293		errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
5294		return (errs);
5295	}
5296
5297	if (pf->opts & PF_OPT_VERBOSE)
5298		printf("set skip on {");
5299	LOOP_THROUGH(struct node_if, interface, interfaces,
5300		if (pf->opts & PF_OPT_VERBOSE)
5301			printf(" %s", interface->ifname);
5302		if (interface->not) {
5303			yyerror("skip on ! <interface> is not supported");
5304			errs++;
5305		} else
5306			errs += pfctl_set_interface_flags(pf,
5307			    interface->ifname, PFI_IFLAG_SKIP, 1);
5308	);
5309	if (pf->opts & PF_OPT_VERBOSE)
5310		printf(" }\n");
5311
5312	FREE_LIST(struct node_if, interfaces);
5313
5314	if (errs)
5315		return (1);
5316	else
5317		return (0);
5318}
5319
5320#undef FREE_LIST
5321#undef LOOP_THROUGH
5322
5323int
5324check_rulestate(int desired_state)
5325{
5326	if (require_order && (rulestate > desired_state)) {
5327		yyerror("Rules must be in order: options, normalization, "
5328		    "queueing, translation, filtering");
5329		return (1);
5330	}
5331	rulestate = desired_state;
5332	return (0);
5333}
5334
5335int
5336kw_cmp(const void *k, const void *e)
5337{
5338	return (strcmp(k, ((const struct keywords *)e)->k_name));
5339}
5340
5341int
5342lookup(char *s)
5343{
5344	/* this has to be sorted always */
5345	static const struct keywords keywords[] = {
5346		{ "all",		ALL},
5347		{ "allow-opts",		ALLOWOPTS},
5348		{ "altq",		ALTQ},
5349		{ "anchor",		ANCHOR},
5350		{ "antispoof",		ANTISPOOF},
5351		{ "any",		ANY},
5352		{ "bandwidth",		BANDWIDTH},
5353		{ "binat",		BINAT},
5354		{ "binat-anchor",	BINATANCHOR},
5355		{ "bitmask",		BITMASK},
5356		{ "block",		BLOCK},
5357		{ "block-policy",	BLOCKPOLICY},
5358		{ "buckets",		BUCKETS},
5359		{ "cbq",		CBQ},
5360		{ "code",		CODE},
5361		{ "codelq",		CODEL},
5362		{ "crop",		FRAGCROP},
5363		{ "debug",		DEBUG},
5364		{ "divert-reply",	DIVERTREPLY},
5365		{ "divert-to",		DIVERTTO},
5366		{ "drop",		DROP},
5367		{ "drop-ovl",		FRAGDROP},
5368		{ "dup-to",		DUPTO},
5369		{ "fairq",		FAIRQ},
5370		{ "fastroute",		FASTROUTE},
5371		{ "file",		FILENAME},
5372		{ "fingerprints",	FINGERPRINTS},
5373		{ "flags",		FLAGS},
5374		{ "floating",		FLOATING},
5375		{ "flush",		FLUSH},
5376		{ "for",		FOR},
5377		{ "fragment",		FRAGMENT},
5378		{ "from",		FROM},
5379		{ "global",		GLOBAL},
5380		{ "group",		GROUP},
5381		{ "hfsc",		HFSC},
5382		{ "hogs",		HOGS},
5383		{ "hostid",		HOSTID},
5384		{ "icmp-type",		ICMPTYPE},
5385		{ "icmp6-type",		ICMP6TYPE},
5386		{ "if-bound",		IFBOUND},
5387		{ "in",			IN},
5388		{ "include",		INCLUDE},
5389		{ "inet",		INET},
5390		{ "inet6",		INET6},
5391		{ "interval",		INTERVAL},
5392		{ "keep",		KEEP},
5393		{ "label",		LABEL},
5394		{ "limit",		LIMIT},
5395		{ "linkshare",		LINKSHARE},
5396		{ "load",		LOAD},
5397		{ "log",		LOG},
5398		{ "loginterface",	LOGINTERFACE},
5399		{ "max",		MAXIMUM},
5400		{ "max-mss",		MAXMSS},
5401		{ "max-src-conn",	MAXSRCCONN},
5402		{ "max-src-conn-rate",	MAXSRCCONNRATE},
5403		{ "max-src-nodes",	MAXSRCNODES},
5404		{ "max-src-states",	MAXSRCSTATES},
5405		{ "min-ttl",		MINTTL},
5406		{ "modulate",		MODULATE},
5407		{ "nat",		NAT},
5408		{ "nat-anchor",		NATANCHOR},
5409		{ "no",			NO},
5410		{ "no-df",		NODF},
5411		{ "no-route",		NOROUTE},
5412		{ "no-sync",		NOSYNC},
5413		{ "on",			ON},
5414		{ "optimization",	OPTIMIZATION},
5415		{ "os",			OS},
5416		{ "out",		OUT},
5417		{ "overload",		OVERLOAD},
5418		{ "pass",		PASS},
5419		{ "port",		PORT},
5420		{ "priority",		PRIORITY},
5421		{ "priq",		PRIQ},
5422		{ "probability",	PROBABILITY},
5423		{ "proto",		PROTO},
5424		{ "qlimit",		QLIMIT},
5425		{ "queue",		QUEUE},
5426		{ "quick",		QUICK},
5427		{ "random",		RANDOM},
5428		{ "random-id",		RANDOMID},
5429		{ "rdr",		RDR},
5430		{ "rdr-anchor",		RDRANCHOR},
5431		{ "realtime",		REALTIME},
5432		{ "reassemble",		REASSEMBLE},
5433		{ "reply-to",		REPLYTO},
5434		{ "require-order",	REQUIREORDER},
5435		{ "return",		RETURN},
5436		{ "return-icmp",	RETURNICMP},
5437		{ "return-icmp6",	RETURNICMP6},
5438		{ "return-rst",		RETURNRST},
5439		{ "round-robin",	ROUNDROBIN},
5440		{ "route",		ROUTE},
5441		{ "route-to",		ROUTETO},
5442		{ "rtable",		RTABLE},
5443		{ "rule",		RULE},
5444		{ "ruleset-optimization",	RULESET_OPTIMIZATION},
5445		{ "scrub",		SCRUB},
5446		{ "set",		SET},
5447		{ "set-tos",		SETTOS},
5448		{ "skip",		SKIP},
5449		{ "sloppy",		SLOPPY},
5450		{ "source-hash",	SOURCEHASH},
5451		{ "source-track",	SOURCETRACK},
5452		{ "state",		STATE},
5453		{ "state-defaults",	STATEDEFAULTS},
5454		{ "state-policy",	STATEPOLICY},
5455		{ "static-port",	STATICPORT},
5456		{ "sticky-address",	STICKYADDRESS},
5457		{ "synproxy",		SYNPROXY},
5458		{ "table",		TABLE},
5459		{ "tag",		TAG},
5460		{ "tagged",		TAGGED},
5461		{ "target",		TARGET},
5462		{ "tbrsize",		TBRSIZE},
5463		{ "timeout",		TIMEOUT},
5464		{ "to",			TO},
5465		{ "tos",		TOS},
5466		{ "ttl",		TTL},
5467		{ "upperlimit",		UPPERLIMIT},
5468		{ "urpf-failed",	URPFFAILED},
5469		{ "user",		USER},
5470	};
5471	const struct keywords	*p;
5472
5473	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5474	    sizeof(keywords[0]), kw_cmp);
5475
5476	if (p) {
5477		if (debug > 1)
5478			fprintf(stderr, "%s: %d\n", s, p->k_val);
5479		return (p->k_val);
5480	} else {
5481		if (debug > 1)
5482			fprintf(stderr, "string: %s\n", s);
5483		return (STRING);
5484	}
5485}
5486
5487#define MAXPUSHBACK	128
5488
5489char	*parsebuf;
5490int	 parseindex;
5491char	 pushback_buffer[MAXPUSHBACK];
5492int	 pushback_index = 0;
5493
5494int
5495lgetc(int quotec)
5496{
5497	int		c, next;
5498
5499	if (parsebuf) {
5500		/* Read character from the parsebuffer instead of input. */
5501		if (parseindex >= 0) {
5502			c = parsebuf[parseindex++];
5503			if (c != '\0')
5504				return (c);
5505			parsebuf = NULL;
5506		} else
5507			parseindex++;
5508	}
5509
5510	if (pushback_index)
5511		return (pushback_buffer[--pushback_index]);
5512
5513	if (quotec) {
5514		if ((c = getc(file->stream)) == EOF) {
5515			yyerror("reached end of file while parsing quoted string");
5516			if (popfile() == EOF)
5517				return (EOF);
5518			return (quotec);
5519		}
5520		return (c);
5521	}
5522
5523	while ((c = getc(file->stream)) == '\\') {
5524		next = getc(file->stream);
5525		if (next != '\n') {
5526			c = next;
5527			break;
5528		}
5529		yylval.lineno = file->lineno;
5530		file->lineno++;
5531	}
5532
5533	while (c == EOF) {
5534		if (popfile() == EOF)
5535			return (EOF);
5536		c = getc(file->stream);
5537	}
5538	return (c);
5539}
5540
5541int
5542lungetc(int c)
5543{
5544	if (c == EOF)
5545		return (EOF);
5546	if (parsebuf) {
5547		parseindex--;
5548		if (parseindex >= 0)
5549			return (c);
5550	}
5551	if (pushback_index < MAXPUSHBACK-1)
5552		return (pushback_buffer[pushback_index++] = c);
5553	else
5554		return (EOF);
5555}
5556
5557int
5558findeol(void)
5559{
5560	int	c;
5561
5562	parsebuf = NULL;
5563
5564	/* skip to either EOF or the first real EOL */
5565	while (1) {
5566		if (pushback_index)
5567			c = pushback_buffer[--pushback_index];
5568		else
5569			c = lgetc(0);
5570		if (c == '\n') {
5571			file->lineno++;
5572			break;
5573		}
5574		if (c == EOF)
5575			break;
5576	}
5577	return (ERROR);
5578}
5579
5580int
5581yylex(void)
5582{
5583	char	 buf[8096];
5584	char	*p, *val;
5585	int	 quotec, next, c;
5586	int	 token;
5587
5588top:
5589	p = buf;
5590	while ((c = lgetc(0)) == ' ' || c == '\t')
5591		; /* nothing */
5592
5593	yylval.lineno = file->lineno;
5594	if (c == '#')
5595		while ((c = lgetc(0)) != '\n' && c != EOF)
5596			; /* nothing */
5597	if (c == '$' && parsebuf == NULL) {
5598		while (1) {
5599			if ((c = lgetc(0)) == EOF)
5600				return (0);
5601
5602			if (p + 1 >= buf + sizeof(buf) - 1) {
5603				yyerror("string too long");
5604				return (findeol());
5605			}
5606			if (isalnum(c) || c == '_') {
5607				*p++ = (char)c;
5608				continue;
5609			}
5610			*p = '\0';
5611			lungetc(c);
5612			break;
5613		}
5614		val = symget(buf);
5615		if (val == NULL) {
5616			yyerror("macro '%s' not defined", buf);
5617			return (findeol());
5618		}
5619		parsebuf = val;
5620		parseindex = 0;
5621		goto top;
5622	}
5623
5624	switch (c) {
5625	case '\'':
5626	case '"':
5627		quotec = c;
5628		while (1) {
5629			if ((c = lgetc(quotec)) == EOF)
5630				return (0);
5631			if (c == '\n') {
5632				file->lineno++;
5633				continue;
5634			} else if (c == '\\') {
5635				if ((next = lgetc(quotec)) == EOF)
5636					return (0);
5637				if (next == quotec || c == ' ' || c == '\t')
5638					c = next;
5639				else if (next == '\n')
5640					continue;
5641				else
5642					lungetc(next);
5643			} else if (c == quotec) {
5644				*p = '\0';
5645				break;
5646			}
5647			if (p + 1 >= buf + sizeof(buf) - 1) {
5648				yyerror("string too long");
5649				return (findeol());
5650			}
5651			*p++ = (char)c;
5652		}
5653		yylval.v.string = strdup(buf);
5654		if (yylval.v.string == NULL)
5655			err(1, "yylex: strdup");
5656		return (STRING);
5657	case '<':
5658		next = lgetc(0);
5659		if (next == '>') {
5660			yylval.v.i = PF_OP_XRG;
5661			return (PORTBINARY);
5662		}
5663		lungetc(next);
5664		break;
5665	case '>':
5666		next = lgetc(0);
5667		if (next == '<') {
5668			yylval.v.i = PF_OP_IRG;
5669			return (PORTBINARY);
5670		}
5671		lungetc(next);
5672		break;
5673	case '-':
5674		next = lgetc(0);
5675		if (next == '>')
5676			return (ARROW);
5677		lungetc(next);
5678		break;
5679	}
5680
5681#define allowed_to_end_number(x) \
5682	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5683
5684	if (c == '-' || isdigit(c)) {
5685		do {
5686			*p++ = c;
5687			if ((unsigned)(p-buf) >= sizeof(buf)) {
5688				yyerror("string too long");
5689				return (findeol());
5690			}
5691		} while ((c = lgetc(0)) != EOF && isdigit(c));
5692		lungetc(c);
5693		if (p == buf + 1 && buf[0] == '-')
5694			goto nodigits;
5695		if (c == EOF || allowed_to_end_number(c)) {
5696			const char *errstr = NULL;
5697
5698			*p = '\0';
5699			yylval.v.number = strtonum(buf, LLONG_MIN,
5700			    LLONG_MAX, &errstr);
5701			if (errstr) {
5702				yyerror("\"%s\" invalid number: %s",
5703				    buf, errstr);
5704				return (findeol());
5705			}
5706			return (NUMBER);
5707		} else {
5708nodigits:
5709			while (p > buf + 1)
5710				lungetc(*--p);
5711			c = *--p;
5712			if (c == '-')
5713				return (c);
5714		}
5715	}
5716
5717#define allowed_in_string(x) \
5718	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
5719	x != '{' && x != '}' && x != '<' && x != '>' && \
5720	x != '!' && x != '=' && x != '/' && x != '#' && \
5721	x != ','))
5722
5723	if (isalnum(c) || c == ':' || c == '_') {
5724		do {
5725			*p++ = c;
5726			if ((unsigned)(p-buf) >= sizeof(buf)) {
5727				yyerror("string too long");
5728				return (findeol());
5729			}
5730		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
5731		lungetc(c);
5732		*p = '\0';
5733		if ((token = lookup(buf)) == STRING)
5734			if ((yylval.v.string = strdup(buf)) == NULL)
5735				err(1, "yylex: strdup");
5736		return (token);
5737	}
5738	if (c == '\n') {
5739		yylval.lineno = file->lineno;
5740		file->lineno++;
5741	}
5742	if (c == EOF)
5743		return (0);
5744	return (c);
5745}
5746
5747int
5748check_file_secrecy(int fd, const char *fname)
5749{
5750	struct stat	st;
5751
5752	if (fstat(fd, &st)) {
5753		warn("cannot stat %s", fname);
5754		return (-1);
5755	}
5756	if (st.st_uid != 0 && st.st_uid != getuid()) {
5757		warnx("%s: owner not root or current user", fname);
5758		return (-1);
5759	}
5760	if (st.st_mode & (S_IRWXG | S_IRWXO)) {
5761		warnx("%s: group/world readable/writeable", fname);
5762		return (-1);
5763	}
5764	return (0);
5765}
5766
5767struct file *
5768pushfile(const char *name, int secret)
5769{
5770	struct file	*nfile;
5771
5772	if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
5773	    (nfile->name = strdup(name)) == NULL) {
5774		warn("malloc");
5775		return (NULL);
5776	}
5777	if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
5778		nfile->stream = stdin;
5779		free(nfile->name);
5780		if ((nfile->name = strdup("stdin")) == NULL) {
5781			warn("strdup");
5782			free(nfile);
5783			return (NULL);
5784		}
5785	} else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
5786		warn("%s", nfile->name);
5787		free(nfile->name);
5788		free(nfile);
5789		return (NULL);
5790	} else if (secret &&
5791	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
5792		fclose(nfile->stream);
5793		free(nfile->name);
5794		free(nfile);
5795		return (NULL);
5796	}
5797	nfile->lineno = 1;
5798	TAILQ_INSERT_TAIL(&files, nfile, entry);
5799	return (nfile);
5800}
5801
5802int
5803popfile(void)
5804{
5805	struct file	*prev;
5806
5807	if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
5808		prev->errors += file->errors;
5809		TAILQ_REMOVE(&files, file, entry);
5810		fclose(file->stream);
5811		free(file->name);
5812		free(file);
5813		file = prev;
5814		return (0);
5815	}
5816	return (EOF);
5817}
5818
5819int
5820parse_config(char *filename, struct pfctl *xpf)
5821{
5822	int		 errors = 0;
5823	struct sym	*sym;
5824
5825	pf = xpf;
5826	errors = 0;
5827	rulestate = PFCTL_STATE_NONE;
5828	returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
5829	returnicmp6default =
5830	    (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
5831	blockpolicy = PFRULE_DROP;
5832	require_order = 1;
5833
5834	if ((file = pushfile(filename, 0)) == NULL) {
5835		warn("cannot open the main config file!");
5836		return (-1);
5837	}
5838
5839	yyparse();
5840	errors = file->errors;
5841	popfile();
5842
5843	/* Free macros and check which have not been used. */
5844	while ((sym = TAILQ_FIRST(&symhead))) {
5845		if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
5846			fprintf(stderr, "warning: macro '%s' not "
5847			    "used\n", sym->nam);
5848		free(sym->nam);
5849		free(sym->val);
5850		TAILQ_REMOVE(&symhead, sym, entry);
5851		free(sym);
5852	}
5853
5854	return (errors ? -1 : 0);
5855}
5856
5857int
5858symset(const char *nam, const char *val, int persist)
5859{
5860	struct sym	*sym;
5861
5862	for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
5863	    sym = TAILQ_NEXT(sym, entry))
5864		;	/* nothing */
5865
5866	if (sym != NULL) {
5867		if (sym->persist == 1)
5868			return (0);
5869		else {
5870			free(sym->nam);
5871			free(sym->val);
5872			TAILQ_REMOVE(&symhead, sym, entry);
5873			free(sym);
5874		}
5875	}
5876	if ((sym = calloc(1, sizeof(*sym))) == NULL)
5877		return (-1);
5878
5879	sym->nam = strdup(nam);
5880	if (sym->nam == NULL) {
5881		free(sym);
5882		return (-1);
5883	}
5884	sym->val = strdup(val);
5885	if (sym->val == NULL) {
5886		free(sym->nam);
5887		free(sym);
5888		return (-1);
5889	}
5890	sym->used = 0;
5891	sym->persist = persist;
5892	TAILQ_INSERT_TAIL(&symhead, sym, entry);
5893	return (0);
5894}
5895
5896int
5897pfctl_cmdline_symset(char *s)
5898{
5899	char	*sym, *val;
5900	int	 ret;
5901
5902	if ((val = strrchr(s, '=')) == NULL)
5903		return (-1);
5904
5905	if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
5906		err(1, "pfctl_cmdline_symset: malloc");
5907
5908	strlcpy(sym, s, strlen(s) - strlen(val) + 1);
5909
5910	ret = symset(sym, val + 1, 1);
5911	free(sym);
5912
5913	return (ret);
5914}
5915
5916char *
5917symget(const char *nam)
5918{
5919	struct sym	*sym;
5920
5921	TAILQ_FOREACH(sym, &symhead, entry)
5922		if (strcmp(nam, sym->nam) == 0) {
5923			sym->used = 1;
5924			return (sym->val);
5925		}
5926	return (NULL);
5927}
5928
5929void
5930mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst)
5931{
5932	int i;
5933	struct pf_rule *r;
5934
5935	for (i = 0; i < PF_RULESET_MAX; ++i) {
5936		while ((r = TAILQ_FIRST(src->rules[i].active.ptr))
5937		    != NULL) {
5938			TAILQ_REMOVE(src->rules[i].active.ptr, r, entries);
5939			TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries);
5940			dst->anchor->match++;
5941		}
5942		src->anchor->match = 0;
5943		while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr))
5944		    != NULL) {
5945			TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries);
5946			TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr,
5947				r, entries);
5948		}
5949	}
5950}
5951
5952void
5953decide_address_family(struct node_host *n, sa_family_t *af)
5954{
5955	if (*af != 0 || n == NULL)
5956		return;
5957	*af = n->af;
5958	while ((n = n->next) != NULL) {
5959		if (n->af != *af) {
5960			*af = 0;
5961			return;
5962		}
5963	}
5964}
5965
5966void
5967remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
5968{
5969	struct node_host	*n = *nh, *prev = NULL;
5970
5971	while (n != NULL) {
5972		if (*af && n->af && n->af != *af) {
5973			/* unlink and free n */
5974			struct node_host *next = n->next;
5975
5976			/* adjust tail pointer */
5977			if (n == (*nh)->tail)
5978				(*nh)->tail = prev;
5979			/* adjust previous node's next pointer */
5980			if (prev == NULL)
5981				*nh = next;
5982			else
5983				prev->next = next;
5984			/* free node */
5985			if (n->ifname != NULL)
5986				free(n->ifname);
5987			free(n);
5988			n = next;
5989		} else {
5990			if (n->af && !*af)
5991				*af = n->af;
5992			prev = n;
5993			n = n->next;
5994		}
5995	}
5996}
5997
5998int
5999invalid_redirect(struct node_host *nh, sa_family_t af)
6000{
6001	if (!af) {
6002		struct node_host *n;
6003
6004		/* tables and dyniftl are ok without an address family */
6005		for (n = nh; n != NULL; n = n->next) {
6006			if (n->addr.type != PF_ADDR_TABLE &&
6007			    n->addr.type != PF_ADDR_DYNIFTL) {
6008				yyerror("address family not given and "
6009				    "translation address expands to multiple "
6010				    "address families");
6011				return (1);
6012			}
6013		}
6014	}
6015	if (nh == NULL) {
6016		yyerror("no translation address with matching address family "
6017		    "found.");
6018		return (1);
6019	}
6020	return (0);
6021}
6022
6023int
6024atoul(char *s, u_long *ulvalp)
6025{
6026	u_long	 ulval;
6027	char	*ep;
6028
6029	errno = 0;
6030	ulval = strtoul(s, &ep, 0);
6031	if (s[0] == '\0' || *ep != '\0')
6032		return (-1);
6033	if (errno == ERANGE && ulval == ULONG_MAX)
6034		return (-1);
6035	*ulvalp = ulval;
6036	return (0);
6037}
6038
6039int
6040getservice(char *n)
6041{
6042	struct servent	*s;
6043	u_long		 ulval;
6044
6045	if (atoul(n, &ulval) == 0) {
6046		if (ulval > 65535) {
6047			yyerror("illegal port value %lu", ulval);
6048			return (-1);
6049		}
6050		return (htons(ulval));
6051	} else {
6052		s = getservbyname(n, "tcp");
6053		if (s == NULL)
6054			s = getservbyname(n, "udp");
6055		if (s == NULL) {
6056			yyerror("unknown port %s", n);
6057			return (-1);
6058		}
6059		return (s->s_port);
6060	}
6061}
6062
6063int
6064rule_label(struct pf_rule *r, char *s)
6065{
6066	if (s) {
6067		if (strlcpy(r->label, s, sizeof(r->label)) >=
6068		    sizeof(r->label)) {
6069			yyerror("rule label too long (max %d chars)",
6070			    sizeof(r->label)-1);
6071			return (-1);
6072		}
6073	}
6074	return (0);
6075}
6076
6077u_int16_t
6078parseicmpspec(char *w, sa_family_t af)
6079{
6080	const struct icmpcodeent	*p;
6081	u_long				 ulval;
6082	u_int8_t			 icmptype;
6083
6084	if (af == AF_INET)
6085		icmptype = returnicmpdefault >> 8;
6086	else
6087		icmptype = returnicmp6default >> 8;
6088
6089	if (atoul(w, &ulval) == -1) {
6090		if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
6091			yyerror("unknown icmp code %s", w);
6092			return (0);
6093		}
6094		ulval = p->code;
6095	}
6096	if (ulval > 255) {
6097		yyerror("invalid icmp code %lu", ulval);
6098		return (0);
6099	}
6100	return (icmptype << 8 | ulval);
6101}
6102
6103int
6104parseport(char *port, struct range *r, int extensions)
6105{
6106	char	*p = strchr(port, ':');
6107
6108	if (p == NULL) {
6109		if ((r->a = getservice(port)) == -1)
6110			return (-1);
6111		r->b = 0;
6112		r->t = PF_OP_NONE;
6113		return (0);
6114	}
6115	if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
6116		*p = 0;
6117		if ((r->a = getservice(port)) == -1)
6118			return (-1);
6119		r->b = 0;
6120		r->t = PF_OP_IRG;
6121		return (0);
6122	}
6123	if ((extensions & PPORT_RANGE)) {
6124		*p++ = 0;
6125		if ((r->a = getservice(port)) == -1 ||
6126		    (r->b = getservice(p)) == -1)
6127			return (-1);
6128		if (r->a == r->b) {
6129			r->b = 0;
6130			r->t = PF_OP_NONE;
6131		} else
6132			r->t = PF_OP_RRG;
6133		return (0);
6134	}
6135	return (-1);
6136}
6137
6138int
6139pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
6140{
6141	struct loadanchors	*la;
6142
6143	TAILQ_FOREACH(la, &loadanchorshead, entries) {
6144		if (pf->opts & PF_OPT_VERBOSE)
6145			fprintf(stderr, "\nLoading anchor %s from %s\n",
6146			    la->anchorname, la->filename);
6147		if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
6148		    la->anchorname, trans) == -1)
6149			return (-1);
6150	}
6151
6152	return (0);
6153}
6154
6155int
6156rt_tableid_max(void)
6157{
6158#ifdef __FreeBSD__
6159	int fibs;
6160	size_t l = sizeof(fibs);
6161
6162        if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1)
6163		fibs = 16;	/* XXX RT_MAXFIBS, at least limit it some. */
6164	/*
6165	 * As the OpenBSD code only compares > and not >= we need to adjust
6166	 * here given we only accept values of 0..n and want to avoid #ifdefs
6167	 * in the grammer.
6168	 */
6169	return (fibs - 1);
6170#else
6171	return (RT_TABLEID_MAX);
6172#endif
6173}
6174