parse.y revision 1.611 
1/*	$OpenBSD: parse.y,v 1.611 2011/12/03 12:46:16 mcbride 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/types.h>
31#include <sys/socket.h>
32#include <sys/stat.h>
33#include <net/if.h>
34#include <netinet/in.h>
35#include <netinet/in_systm.h>
36#include <netinet/ip.h>
37#include <netinet/ip_icmp.h>
38#include <netinet/icmp6.h>
39#include <net/pfvar.h>
40#include <arpa/inet.h>
41#include <altq/altq.h>
42#include <altq/altq_cbq.h>
43#include <altq/altq_priq.h>
44#include <altq/altq_hfsc.h>
45
46#include <stdio.h>
47#include <unistd.h>
48#include <stdlib.h>
49#include <netdb.h>
50#include <stdarg.h>
51#include <errno.h>
52#include <string.h>
53#include <ctype.h>
54#include <math.h>
55#include <err.h>
56#include <limits.h>
57#include <pwd.h>
58#include <grp.h>
59#include <md5.h>
60
61#include "pfctl_parser.h"
62#include "pfctl.h"
63
64static struct pfctl	*pf = NULL;
65static int		 debug = 0;
66static u_int16_t	 returnicmpdefault =
67			    (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
68static u_int16_t	 returnicmp6default =
69			    (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
70static int		 blockpolicy = PFRULE_DROP;
71static int		 default_statelock;
72
73TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
74static struct file {
75	TAILQ_ENTRY(file)	 entry;
76	FILE			*stream;
77	char			*name;
78	int			 lineno;
79	int			 errors;
80} *file;
81struct file	*pushfile(const char *, int);
82int		 popfile(void);
83int		 check_file_secrecy(int, const char *);
84int		 yyparse(void);
85int		 yylex(void);
86int		 yyerror(const char *, ...);
87int		 kw_cmp(const void *, const void *);
88int		 lookup(char *);
89int		 lgetc(int);
90int		 lungetc(int);
91int		 findeol(void);
92
93TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
94struct sym {
95	TAILQ_ENTRY(sym)	 entry;
96	int			 used;
97	int			 persist;
98	char			*nam;
99	char			*val;
100};
101int		 symset(const char *, const char *, int);
102char		*symget(const char *);
103
104int		 atoul(char *, u_long *);
105
106struct node_proto {
107	u_int8_t		 proto;
108	struct node_proto	*next;
109	struct node_proto	*tail;
110};
111
112struct node_port {
113	u_int16_t		 port[2];
114	u_int8_t		 op;
115	struct node_port	*next;
116	struct node_port	*tail;
117};
118
119struct node_uid {
120	uid_t			 uid[2];
121	u_int8_t		 op;
122	struct node_uid		*next;
123	struct node_uid		*tail;
124};
125
126struct node_gid {
127	gid_t			 gid[2];
128	u_int8_t		 op;
129	struct node_gid		*next;
130	struct node_gid		*tail;
131};
132
133struct node_icmp {
134	u_int8_t		 code;
135	u_int8_t		 type;
136	u_int8_t		 proto;
137	struct node_icmp	*next;
138	struct node_icmp	*tail;
139};
140
141enum	{ PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
142	    PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
143	    PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
144	    PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
145	    PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY,
146	    PF_STATE_OPT_PFLOW };
147
148enum	{ PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
149
150struct node_state_opt {
151	int			 type;
152	union {
153		u_int32_t	 max_states;
154		u_int32_t	 max_src_states;
155		u_int32_t	 max_src_conn;
156		struct {
157			u_int32_t	limit;
158			u_int32_t	seconds;
159		}		 max_src_conn_rate;
160		struct {
161			u_int8_t	flush;
162			char		tblname[PF_TABLE_NAME_SIZE];
163		}		 overload;
164		u_int32_t	 max_src_nodes;
165		u_int8_t	 src_track;
166		u_int32_t	 statelock;
167		struct {
168			int		number;
169			u_int32_t	seconds;
170		}		 timeout;
171	}			 data;
172	struct node_state_opt	*next;
173	struct node_state_opt	*tail;
174};
175
176struct peer {
177	struct node_host	*host;
178	struct node_port	*port;
179};
180
181struct node_queue {
182	char			 queue[PF_QNAME_SIZE];
183	char			 parent[PF_QNAME_SIZE];
184	char			 ifname[IFNAMSIZ];
185	int			 scheduler;
186	struct node_queue	*next;
187	struct node_queue	*tail;
188}	*queues = NULL;
189
190struct node_qassign {
191	char		*qname;
192	char		*pqname;
193};
194
195struct range {
196	int		 a;
197	int		 b;
198	int		 t;
199};
200struct redirection {
201	struct node_host	*host;
202	struct range		 rport;
203};
204
205struct pool_opts {
206	int			 marker;
207#define POM_TYPE		0x01
208#define POM_STICKYADDRESS	0x02
209	u_int8_t		 opts;
210	int			 type;
211	int			 staticport;
212	struct pf_poolhashkey	*key;
213
214} pool_opts;
215
216struct redirspec {
217	struct redirection      *rdr;
218	struct pool_opts         pool_opts;
219	int			 binat;
220	int			 af;
221};
222
223struct filter_opts {
224	int			 marker;
225#define FOM_FLAGS	0x0001
226#define FOM_ICMP	0x0002
227#define FOM_TOS		0x0004
228#define FOM_KEEP	0x0008
229#define FOM_SRCTRACK	0x0010
230#define FOM_MINTTL	0x0020
231#define FOM_MAXMSS	0x0040
232#define FOM_AFTO	0x0080
233#define FOM_SETTOS	0x0100
234#define FOM_SCRUB_TCP	0x0200
235#define FOM_PRIO	0x0400
236#define FOM_ONCE	0x1000
237	struct node_uid		*uid;
238	struct node_gid		*gid;
239	struct node_if		*rcv;
240	struct {
241		u_int8_t	 b1;
242		u_int8_t	 b2;
243		u_int16_t	 w;
244		u_int16_t	 w2;
245	} flags;
246	struct node_icmp	*icmpspec;
247	u_int32_t		 tos;
248	u_int32_t		 prob;
249	struct {
250		int			 action;
251		struct node_state_opt	*options;
252	} keep;
253	int			 fragment;
254	int			 allowopts;
255	char			*label;
256	struct node_qassign	 queues;
257	char			*tag;
258	char			*match_tag;
259	u_int8_t		 match_tag_not;
260	u_int			 rtableid;
261	u_int8_t		 prio[2];
262	struct {
263		struct node_host	*addr;
264		u_int16_t		port;
265	}			 divert, divert_packet;
266	struct redirspec	 nat;
267	struct redirspec	 rdr;
268	struct redirspec	 rroute;
269
270	/* scrub opts */
271	int			 nodf;
272	int			 minttl;
273	int			 settos;
274	int			 randomid;
275	int			 max_mss;
276
277	/* route opts */
278	struct {
279		struct node_host	*host;
280		u_int8_t		 rt;
281		u_int8_t		 pool_opts;
282		sa_family_t		 af;
283		struct pf_poolhashkey	*key;
284	}			 route;
285} filter_opts;
286
287struct antispoof_opts {
288	char			*label;
289	u_int			 rtableid;
290} antispoof_opts;
291
292struct scrub_opts {
293	int			marker;
294	int			nodf;
295	int			minttl;
296	int			maxmss;
297	int			settos;
298	int			randomid;
299	int			reassemble_tcp;
300} scrub_opts;
301
302struct queue_opts {
303	int			marker;
304#define QOM_BWSPEC	0x01
305#define QOM_SCHEDULER	0x02
306#define QOM_PRIORITY	0x04
307#define QOM_TBRSIZE	0x08
308#define QOM_QLIMIT	0x10
309	struct node_queue_bw	queue_bwspec;
310	struct node_queue_opt	scheduler;
311	int			priority;
312	int			tbrsize;
313	int			qlimit;
314} queue_opts;
315
316struct table_opts {
317	int			flags;
318	int			init_addr;
319	struct node_tinithead	init_nodes;
320} table_opts;
321
322struct node_hfsc_opts	 hfsc_opts;
323struct node_state_opt	*keep_state_defaults = NULL;
324
325int		 disallow_table(struct node_host *, const char *);
326int		 disallow_urpf_failed(struct node_host *, const char *);
327int		 disallow_alias(struct node_host *, const char *);
328int		 rule_consistent(struct pf_rule *, int);
329int		 process_tabledef(char *, struct table_opts *);
330void		 expand_label_str(char *, size_t, const char *, const char *);
331void		 expand_label_if(const char *, char *, size_t, const char *);
332void		 expand_label_addr(const char *, char *, size_t, u_int8_t,
333		    struct node_host *);
334void		 expand_label_port(const char *, char *, size_t,
335		    struct node_port *);
336void		 expand_label_proto(const char *, char *, size_t, u_int8_t);
337void		 expand_label_nr(const char *, char *, size_t);
338void		 expand_label(char *, size_t, const char *, u_int8_t,
339		    struct node_host *, struct node_port *, struct node_host *,
340		    struct node_port *, u_int8_t);
341int		 collapse_redirspec(struct pf_pool *, struct pf_rule *,
342		    struct redirspec *rs, u_int8_t);
343int		 apply_redirspec(struct pf_pool *, struct pf_rule *,
344		    struct redirspec *, int, struct node_port *);
345void		 expand_rule(struct pf_rule *, int, struct node_if *,
346		    struct redirspec *, struct redirspec *, struct redirspec *,
347		    struct node_proto *,
348		    struct node_os *, struct node_host *, struct node_port *,
349		    struct node_host *, struct node_port *, struct node_uid *,
350		    struct node_gid *, struct node_if *, struct node_icmp *,
351		    const char *);
352int		 expand_altq(struct pf_altq *, struct node_if *,
353		    struct node_queue *, struct node_queue_bw bwspec,
354		    struct node_queue_opt *);
355int		 expand_queue(struct pf_altq *, struct node_if *,
356		    struct node_queue *, struct node_queue_bw,
357		    struct node_queue_opt *);
358int		 expand_skip_interface(struct node_if *);
359
360int	 getservice(char *);
361int	 rule_label(struct pf_rule *, char *);
362
363void	 mv_rules(struct pf_ruleset *, struct pf_ruleset *);
364void	 decide_address_family(struct node_host *, sa_family_t *);
365int	 invalid_redirect(struct node_host *, sa_family_t);
366u_int16_t parseicmpspec(char *, sa_family_t);
367int	 kw_casecmp(const void *, const void *);
368int	 map_tos(char *string, int *);
369
370TAILQ_HEAD(loadanchorshead, loadanchors)
371    loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
372
373struct loadanchors {
374	TAILQ_ENTRY(loadanchors)	 entries;
375	char				*anchorname;
376	char				*filename;
377};
378
379typedef struct {
380	union {
381		int64_t			 number;
382		double			 probability;
383		int			 i;
384		char			*string;
385		u_int			 rtableid;
386		u_int16_t		 weight;
387		struct {
388			u_int8_t	 b1;
389			u_int8_t	 b2;
390			u_int16_t	 w;
391			u_int16_t	 w2;
392		}			 b;
393		struct range		 range;
394		struct node_if		*interface;
395		struct node_proto	*proto;
396		struct node_icmp	*icmp;
397		struct node_host	*host;
398		struct node_os		*os;
399		struct node_port	*port;
400		struct node_uid		*uid;
401		struct node_gid		*gid;
402		struct node_state_opt	*state_opt;
403		struct peer		 peer;
404		struct {
405			struct peer	 src, dst;
406			struct node_os	*src_os;
407		}			 fromto;
408		struct redirection	*redirection;
409		struct {
410			int			 action;
411			struct node_state_opt	*options;
412		}			 keep_state;
413		struct {
414			u_int8_t	 log;
415			u_int8_t	 logif;
416			u_int8_t	 quick;
417		}			 logquick;
418		struct {
419			int		 neg;
420			char		*name;
421		}			 tagged;
422		struct pf_poolhashkey	*hashkey;
423		struct node_queue	*queue;
424		struct node_queue_opt	 queue_options;
425		struct node_queue_bw	 queue_bwspec;
426		struct node_qassign	 qassign;
427		struct filter_opts	 filter_opts;
428		struct antispoof_opts	 antispoof_opts;
429		struct queue_opts	 queue_opts;
430		struct scrub_opts	 scrub_opts;
431		struct table_opts	 table_opts;
432		struct pool_opts	 pool_opts;
433		struct node_hfsc_opts	 hfsc_opts;
434	} v;
435	int lineno;
436} YYSTYPE;
437
438#define PPORT_RANGE	1
439#define PPORT_STAR	2
440int	parseport(char *, struct range *r, int);
441
442#define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
443	(!((addr).iflags & PFI_AFLAG_NOALIAS) ||		 \
444	!isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
445
446%}
447
448%token	PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
449%token	RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
450%token	ICMP6TYPE CODE KEEP MODULATE STATE PORT BINATTO NODF
451%token	MINTTL ERROR ALLOWOPTS FILENAME ROUTETO DUPTO REPLYTO NO LABEL
452%token	NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
453%token	REASSEMBLE ANCHOR
454%token	SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
455%token	SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
456%token	ANTISPOOF FOR INCLUDE MATCHES
457%token	BITMASK RANDOM SOURCEHASH ROUNDROBIN LEASTSTATES STATICPORT PROBABILITY
458%token	WEIGHT
459%token	ALTQ CBQ PRIQ HFSC BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT
460%token	QUEUE PRIORITY QLIMIT RTABLE RDOMAIN
461%token	LOAD RULESET_OPTIMIZATION RTABLE RDOMAIN PRIO ONCE
462%token	STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
463%token	MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY PFLOW
464%token	TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
465%token	DIVERTTO DIVERTREPLY DIVERTPACKET NATTO AFTO RDRTO RECEIVEDON NE LE GE
466%token	<v.string>		STRING
467%token	<v.number>		NUMBER
468%token	<v.i>			PORTBINARY
469%type	<v.interface>		interface if_list if_item_not if_item
470%type	<v.number>		number icmptype icmp6type uid gid
471%type	<v.number>		tos not yesno optnodf
472%type	<v.probability>		probability
473%type	<v.weight>		optweight
474%type	<v.i>			dir af optimizer
475%type	<v.i>			sourcetrack flush unaryop statelock
476%type	<v.b>			action
477%type	<v.b>			flags flag blockspec prio
478%type	<v.range>		portplain portstar portrange
479%type	<v.hashkey>		hashkey
480%type	<v.proto>		proto proto_list proto_item
481%type	<v.number>		protoval
482%type	<v.icmp>		icmpspec
483%type	<v.icmp>		icmp_list icmp_item
484%type	<v.icmp>		icmp6_list icmp6_item
485%type	<v.number>		reticmpspec reticmp6spec
486%type	<v.fromto>		fromto
487%type	<v.peer>		ipportspec from to
488%type	<v.host>		ipspec xhost host dynaddr host_list
489%type	<v.host>		table_host_list tablespec
490%type	<v.host>		redir_host_list redirspec
491%type	<v.host>		route_host route_host_list routespec
492%type	<v.os>			os xos os_list
493%type	<v.port>		portspec port_list port_item
494%type	<v.uid>			uids uid_list uid_item
495%type	<v.gid>			gids gid_list gid_item
496%type	<v.redirection>		redirpool
497%type	<v.string>		label stringall anchorname
498%type	<v.string>		string varstring numberstring
499%type	<v.keep_state>		keep
500%type	<v.state_opt>		state_opt_spec state_opt_list state_opt_item
501%type	<v.logquick>		logquick quick log logopts logopt
502%type	<v.interface>		antispoof_ifspc antispoof_iflst antispoof_if
503%type	<v.qassign>		qname
504%type	<v.queue>		qassign qassign_list qassign_item
505%type	<v.queue_options>	scheduler
506%type	<v.number>		cbqflags_list cbqflags_item
507%type	<v.number>		priqflags_list priqflags_item
508%type	<v.hfsc_opts>		hfscopts_list hfscopts_item hfsc_opts
509%type	<v.queue_bwspec>	bandwidth
510%type	<v.filter_opts>		filter_opts filter_opt filter_opts_l
511%type	<v.antispoof_opts>	antispoof_opts antispoof_opt antispoof_opts_l
512%type	<v.queue_opts>		queue_opts queue_opt queue_opts_l
513%type	<v.scrub_opts>		scrub_opts scrub_opt scrub_opts_l
514%type	<v.table_opts>		table_opts table_opt table_opts_l
515%type	<v.pool_opts>		pool_opts pool_opt pool_opts_l
516%%
517
518ruleset		: /* empty */
519		| ruleset include '\n'
520		| ruleset '\n'
521		| ruleset option '\n'
522		| ruleset pfrule '\n'
523		| ruleset anchorrule '\n'
524		| ruleset loadrule '\n'
525		| ruleset altqif '\n'
526		| ruleset queuespec '\n'
527		| ruleset varset '\n'
528		| ruleset antispoof '\n'
529		| ruleset tabledef '\n'
530		| '{' fakeanchor '}' '\n';
531		| ruleset error '\n'		{ file->errors++; }
532		;
533
534include		: INCLUDE STRING		{
535			struct file	*nfile;
536
537			if ((nfile = pushfile($2, 0)) == NULL) {
538				yyerror("failed to include file %s", $2);
539				free($2);
540				YYERROR;
541			}
542			free($2);
543
544			file = nfile;
545			lungetc('\n');
546		}
547		;
548
549/*
550 * apply to previously specified rule: must be careful to note
551 * what that is: pf or nat or binat or rdr
552 */
553fakeanchor	: fakeanchor '\n'
554		| fakeanchor anchorrule '\n'
555		| fakeanchor pfrule '\n'
556		| fakeanchor error '\n'
557		;
558
559optimizer	: string	{
560			if (!strcmp($1, "none"))
561				$$ = 0;
562			else if (!strcmp($1, "basic"))
563				$$ = PF_OPTIMIZE_BASIC;
564			else if (!strcmp($1, "profile"))
565				$$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
566			else {
567				yyerror("unknown ruleset-optimization %s", $1);
568				YYERROR;
569			}
570		}
571		;
572
573optnodf		: /* empty */	{ $$ = 0; }
574		| NODF		{ $$ = 1; }
575		;
576
577option		: SET REASSEMBLE yesno optnodf		{
578			pfctl_set_reassembly(pf, $3, $4);
579		}
580		| SET OPTIMIZATION STRING		{
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 (pfctl_set_logif(pf, $3) != 0) {
600				yyerror("error setting loginterface %s", $3);
601				free($3);
602				YYERROR;
603			}
604			free($3);
605		}
606		| SET HOSTID number {
607			if ($3 == 0 || $3 > UINT_MAX) {
608				yyerror("hostid must be non-zero");
609				YYERROR;
610			}
611			pfctl_set_hostid(pf, $3);
612		}
613		| SET BLOCKPOLICY DROP	{
614			if (pf->opts & PF_OPT_VERBOSE)
615				printf("set block-policy drop\n");
616			blockpolicy = PFRULE_DROP;
617		}
618		| SET BLOCKPOLICY RETURN {
619			if (pf->opts & PF_OPT_VERBOSE)
620				printf("set block-policy return\n");
621			blockpolicy = PFRULE_RETURN;
622		}
623		| SET FINGERPRINTS STRING {
624			if (pf->opts & PF_OPT_VERBOSE)
625				printf("set fingerprints \"%s\"\n", $3);
626			if (!pf->anchor->name[0]) {
627				if (pfctl_file_fingerprints(pf->dev,
628				    pf->opts, $3)) {
629					yyerror("error loading "
630					    "fingerprints %s", $3);
631					free($3);
632					YYERROR;
633				}
634			}
635			free($3);
636		}
637		| SET STATEPOLICY statelock {
638			if (pf->opts & PF_OPT_VERBOSE)
639				switch ($3) {
640				case 0:
641					printf("set state-policy floating\n");
642					break;
643				case PFRULE_IFBOUND:
644					printf("set state-policy if-bound\n");
645					break;
646				}
647			default_statelock = $3;
648		}
649		| SET DEBUG STRING {
650			if (pfctl_set_debug(pf, $3) != 0) {
651				yyerror("error setting debuglevel %s", $3);
652				free($3);
653				YYERROR;
654			}
655			free($3);
656		}
657		| SET DEBUG DEBUG {
658			if (pfctl_set_debug(pf, "debug") != 0) {
659				yyerror("error setting debuglevel debug");
660				YYERROR;
661			}
662		}
663		| SET SKIP interface {
664			if (expand_skip_interface($3) != 0) {
665				yyerror("error setting skip interface(s)");
666				YYERROR;
667			}
668		}
669		| SET STATEDEFAULTS state_opt_list {
670			if (keep_state_defaults != NULL) {
671				yyerror("cannot redefine state-defaults");
672				YYERROR;
673			}
674			keep_state_defaults = $3;
675		}
676		;
677
678stringall	: STRING	{ $$ = $1; }
679		| ALL		{
680			if (($$ = strdup("all")) == NULL) {
681				err(1, "stringall: strdup");
682			}
683		}
684		;
685
686string		: STRING string				{
687			if (asprintf(&$$, "%s %s", $1, $2) == -1)
688				err(1, "string: asprintf");
689			free($1);
690			free($2);
691		}
692		| STRING
693		;
694
695varstring	: numberstring varstring 		{
696			if (asprintf(&$$, "%s %s", $1, $2) == -1)
697				err(1, "string: asprintf");
698			free($1);
699			free($2);
700		}
701		| numberstring
702		;
703
704numberstring	: NUMBER				{
705			char	*s;
706			if (asprintf(&s, "%lld", $1) == -1) {
707				yyerror("string: asprintf");
708				YYERROR;
709			}
710			$$ = s;
711		}
712		| STRING
713		;
714
715varset		: STRING '=' varstring	{
716			if (pf->opts & PF_OPT_VERBOSE)
717				printf("%s = \"%s\"\n", $1, $3);
718			if (symset($1, $3, 0) == -1)
719				err(1, "cannot store variable %s", $1);
720			free($1);
721			free($3);
722		}
723		;
724
725anchorname	: STRING			{ $$ = $1; }
726		| /* empty */			{ $$ = NULL; }
727		;
728
729pfa_anchorlist	: /* empty */
730		| pfa_anchorlist '\n'
731		| pfa_anchorlist pfrule '\n'
732		| pfa_anchorlist anchorrule '\n'
733		;
734
735pfa_anchor	: '{'
736		{
737			char ta[PF_ANCHOR_NAME_SIZE];
738			struct pf_ruleset *rs;
739
740			/* steping into a brace anchor */
741			pf->asd++;
742			pf->bn++;
743			pf->brace = 1;
744
745			/*
746			 * Anchor contents are parsed before the anchor rule
747			 * production completes, so we don't know the real
748			 * location yet. Create a holding ruleset in the root;
749			 * contents will be moved afterwards.
750			 */
751			snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
752			rs = pf_find_or_create_ruleset(ta);
753			if (rs == NULL)
754				err(1, "pfa_anchor: pf_find_or_create_ruleset");
755			pf->astack[pf->asd] = rs->anchor;
756			pf->anchor = rs->anchor;
757		} '\n' pfa_anchorlist '}'
758		{
759			pf->alast = pf->anchor;
760			pf->asd--;
761			pf->anchor = pf->astack[pf->asd];
762		}
763		| /* empty */
764		;
765
766anchorrule	: ANCHOR anchorname dir quick interface af proto fromto
767		    filter_opts pfa_anchor
768		{
769			struct pf_rule	r;
770			struct node_proto	*proto;
771
772			if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
773				free($2);
774				yyerror("anchor names beginning with '_' "
775				    "are reserved for internal use");
776				YYERROR;
777			}
778
779			memset(&r, 0, sizeof(r));
780			if (pf->astack[pf->asd + 1]) {
781				if ($2 && strchr($2, '/') != NULL) {
782					free($2);
783					yyerror("anchor paths containing '/' "
784				    	    "cannot be used for inline anchors.");
785					YYERROR;
786				}
787
788				/* Move inline rules into relative location. */
789				pf_anchor_setup(&r,
790				    &pf->astack[pf->asd]->ruleset,
791				    $2 ? $2 : pf->alast->name);
792
793				if (r.anchor == NULL)
794					err(1, "anchorrule: unable to "
795					    "create ruleset");
796
797				if (pf->alast != r.anchor) {
798					if (r.anchor->match) {
799						yyerror("inline anchor '%s' "
800						    "already exists",
801						    r.anchor->name);
802						YYERROR;
803					}
804					mv_rules(&pf->alast->ruleset,
805					    &r.anchor->ruleset);
806				}
807				pf_remove_if_empty_ruleset(&pf->alast->ruleset);
808				pf->alast = r.anchor;
809			} else {
810				if (!$2) {
811					yyerror("anchors without explicit "
812					    "rules must specify a name");
813					YYERROR;
814				}
815			}
816			r.direction = $3;
817			r.quick = $4.quick;
818			r.af = $6;
819			r.prob = $9.prob;
820			r.rtableid = $9.rtableid;
821
822			if ($9.tag)
823				if (strlcpy(r.tagname, $9.tag,
824				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
825					yyerror("tag too long, max %u chars",
826					    PF_TAG_NAME_SIZE - 1);
827					YYERROR;
828				}
829			if ($9.match_tag)
830				if (strlcpy(r.match_tagname, $9.match_tag,
831				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
832					yyerror("tag too long, max %u chars",
833					    PF_TAG_NAME_SIZE - 1);
834					YYERROR;
835				}
836			r.match_tag_not = $9.match_tag_not;
837			if (rule_label(&r, $9.label))
838				YYERROR;
839			free($9.label);
840			r.flags = $9.flags.b1;
841			r.flagset = $9.flags.b2;
842			if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
843				yyerror("flags always false");
844				YYERROR;
845			}
846			if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
847				for (proto = $7; proto != NULL &&
848				    proto->proto != IPPROTO_TCP;
849				    proto = proto->next)
850					;	/* nothing */
851				if (proto == NULL && $7 != NULL) {
852					if ($9.flags.b1 || $9.flags.b2)
853						yyerror(
854						    "flags only apply to tcp");
855					if ($8.src_os)
856						yyerror(
857						    "OS fingerprinting only "
858						    "applies to tcp");
859					YYERROR;
860				}
861			}
862
863			r.tos = $9.tos;
864
865			if ($9.keep.action) {
866				yyerror("cannot specify state handling "
867				    "on anchors");
868				YYERROR;
869			}
870
871			if ($9.route.rt) {
872				yyerror("cannot specify route handling "
873				    "on anchors");
874				YYERROR;
875			}
876
877			if ($9.marker & FOM_ONCE) {
878				yyerror("cannot specify 'once' "
879				    "on anchors");
880				YYERROR;
881			}
882
883			if ($9.match_tag)
884				if (strlcpy(r.match_tagname, $9.match_tag,
885				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
886					yyerror("tag too long, max %u chars",
887					    PF_TAG_NAME_SIZE - 1);
888					YYERROR;
889				}
890			r.match_tag_not = $9.match_tag_not;
891			if ($9.marker & FOM_PRIO) {
892				r.prio[0] = $9.prio[0];
893				r.prio[1] = $9.prio[1];
894			} else
895				r.prio[0] = r.prio[1] = PF_PRIO_NOTSET;
896
897			decide_address_family($8.src.host, &r.af);
898			decide_address_family($8.dst.host, &r.af);
899			r.naf = r.af;
900
901			expand_rule(&r, 0, $5, NULL, NULL, NULL, $7, $8.src_os,
902			    $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
903			    $9.uid, $9.gid, $9.rcv, $9.icmpspec,
904			    pf->astack[pf->asd + 1] ? pf->alast->name : $2);
905			free($2);
906			pf->astack[pf->asd + 1] = NULL;
907		}
908		;
909
910loadrule	: LOAD ANCHOR string FROM string	{
911			struct loadanchors	*loadanchor;
912
913			if (strlen(pf->anchor->name) + 1 +
914			    strlen($3) >= MAXPATHLEN) {
915				yyerror("anchorname %s too long, max %u\n",
916				    $3, MAXPATHLEN - 1);
917				free($3);
918				YYERROR;
919			}
920			loadanchor = calloc(1, sizeof(struct loadanchors));
921			if (loadanchor == NULL)
922				err(1, "loadrule: calloc");
923			if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
924			    NULL)
925				err(1, "loadrule: malloc");
926			if (pf->anchor->name[0])
927				snprintf(loadanchor->anchorname, MAXPATHLEN,
928				    "%s/%s", pf->anchor->name, $3);
929			else
930				strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
931			if ((loadanchor->filename = strdup($5)) == NULL)
932				err(1, "loadrule: strdup");
933
934			TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
935			    entries);
936
937			free($3);
938			free($5);
939		};
940
941scrub_opts	:	{
942				bzero(&scrub_opts, sizeof scrub_opts);
943			}
944		    scrub_opts_l
945			{ $$ = scrub_opts; }
946		;
947
948scrub_opts_l	: scrub_opts_l comma scrub_opt
949		| scrub_opt
950		;
951
952scrub_opt	: NODF	{
953			if (scrub_opts.nodf) {
954				yyerror("no-df cannot be respecified");
955				YYERROR;
956			}
957			scrub_opts.nodf = 1;
958		}
959		| MINTTL NUMBER {
960			if (scrub_opts.marker & FOM_MINTTL) {
961				yyerror("min-ttl cannot be respecified");
962				YYERROR;
963			}
964			if ($2 < 0 || $2 > 255) {
965				yyerror("illegal min-ttl value %d", $2);
966				YYERROR;
967			}
968			scrub_opts.marker |= FOM_MINTTL;
969			scrub_opts.minttl = $2;
970		}
971		| MAXMSS NUMBER {
972			if (scrub_opts.marker & FOM_MAXMSS) {
973				yyerror("max-mss cannot be respecified");
974				YYERROR;
975			}
976			if ($2 < 0 || $2 > 65535) {
977				yyerror("illegal max-mss value %d", $2);
978				YYERROR;
979			}
980			scrub_opts.marker |= FOM_MAXMSS;
981			scrub_opts.maxmss = $2;
982		}
983		| SETTOS tos {
984			if (scrub_opts.marker & FOM_SETTOS) {
985				yyerror("set-tos cannot be respecified");
986				YYERROR;
987			}
988			scrub_opts.marker |= FOM_SETTOS;
989			scrub_opts.settos = $2;
990		}
991		| REASSEMBLE STRING {
992			if (strcasecmp($2, "tcp") != 0) {
993				yyerror("scrub reassemble supports only tcp, "
994				    "not '%s'", $2);
995				free($2);
996				YYERROR;
997			}
998			free($2);
999			if (scrub_opts.reassemble_tcp) {
1000				yyerror("reassemble tcp cannot be respecified");
1001				YYERROR;
1002			}
1003			scrub_opts.reassemble_tcp = 1;
1004		}
1005		| RANDOMID {
1006			if (scrub_opts.randomid) {
1007				yyerror("random-id cannot be respecified");
1008				YYERROR;
1009			}
1010			scrub_opts.randomid = 1;
1011		}
1012		;
1013
1014antispoof	: ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1015			struct pf_rule		 r;
1016			struct node_host	*h = NULL, *hh;
1017			struct node_if		*i, *j;
1018
1019			for (i = $3; i; i = i->next) {
1020				bzero(&r, sizeof(r));
1021
1022				r.action = PF_DROP;
1023				r.direction = PF_IN;
1024				r.log = $2.log;
1025				r.logif = $2.logif;
1026				r.quick = $2.quick;
1027				r.af = $4;
1028				r.prio[0] = r.prio[1] = PF_PRIO_NOTSET;
1029				if (rule_label(&r, $5.label))
1030					YYERROR;
1031				r.rtableid = $5.rtableid;
1032				j = calloc(1, sizeof(struct node_if));
1033				if (j == NULL)
1034					err(1, "antispoof: calloc");
1035				if (strlcpy(j->ifname, i->ifname,
1036				    sizeof(j->ifname)) >= sizeof(j->ifname)) {
1037					free(j);
1038					yyerror("interface name too long");
1039					YYERROR;
1040				}
1041				j->not = 1;
1042				if (i->dynamic) {
1043					h = calloc(1, sizeof(*h));
1044					if (h == NULL)
1045						err(1, "address: calloc");
1046					h->addr.type = PF_ADDR_DYNIFTL;
1047					set_ipmask(h, 128);
1048					if (strlcpy(h->addr.v.ifname, i->ifname,
1049					    sizeof(h->addr.v.ifname)) >=
1050					    sizeof(h->addr.v.ifname)) {
1051						free(h);
1052						yyerror(
1053						    "interface name too long");
1054						YYERROR;
1055					}
1056					hh = malloc(sizeof(*hh));
1057					if (hh == NULL)
1058						 err(1, "address: malloc");
1059					bcopy(h, hh, sizeof(*hh));
1060					h->addr.iflags = PFI_AFLAG_NETWORK;
1061				} else {
1062					h = ifa_lookup(j->ifname,
1063					    PFI_AFLAG_NETWORK);
1064					hh = NULL;
1065				}
1066
1067				if (h != NULL)
1068					expand_rule(&r, 0, j, NULL, NULL, NULL,
1069					    NULL, NULL, h, NULL, NULL, NULL,
1070					    NULL, NULL, NULL, NULL, "");
1071
1072				if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1073					bzero(&r, sizeof(r));
1074
1075					r.action = PF_DROP;
1076					r.direction = PF_IN;
1077					r.log = $2.log;
1078					r.logif = $2.logif;
1079					r.quick = $2.quick;
1080					r.af = $4;
1081					if (rule_label(&r, $5.label))
1082						YYERROR;
1083					r.rtableid = $5.rtableid;
1084					if (hh != NULL)
1085						h = hh;
1086					else
1087						h = ifa_lookup(i->ifname, 0);
1088					if (h != NULL)
1089						expand_rule(&r, 0, NULL, NULL,
1090						    NULL, NULL, NULL, NULL, h,
1091						    NULL, NULL, NULL, NULL,
1092						    NULL, NULL, NULL, "");
1093				} else
1094					free(hh);
1095			}
1096			free($5.label);
1097		}
1098		;
1099
1100antispoof_ifspc	: FOR antispoof_if			{ $$ = $2; }
1101		| FOR '{' optnl antispoof_iflst '}'	{ $$ = $4; }
1102		;
1103
1104antispoof_iflst	: antispoof_if optnl			{ $$ = $1; }
1105		| antispoof_iflst comma antispoof_if optnl {
1106			$1->tail->next = $3;
1107			$1->tail = $3;
1108			$$ = $1;
1109		}
1110		;
1111
1112antispoof_if	: if_item				{ $$ = $1; }
1113		| '(' if_item ')'			{
1114			$2->dynamic = 1;
1115			$$ = $2;
1116		}
1117		;
1118
1119antispoof_opts	:	{
1120				bzero(&antispoof_opts, sizeof antispoof_opts);
1121				antispoof_opts.rtableid = -1;
1122			}
1123		    antispoof_opts_l
1124			{ $$ = antispoof_opts; }
1125		| /* empty */	{
1126			bzero(&antispoof_opts, sizeof antispoof_opts);
1127			antispoof_opts.rtableid = -1;
1128			$$ = antispoof_opts;
1129		}
1130		;
1131
1132antispoof_opts_l	: antispoof_opts_l antispoof_opt
1133			| antispoof_opt
1134			;
1135
1136antispoof_opt	: LABEL label	{
1137			if (antispoof_opts.label) {
1138				yyerror("label cannot be redefined");
1139				YYERROR;
1140			}
1141			antispoof_opts.label = $2;
1142		}
1143		| RTABLE NUMBER				{
1144			if ($2 < 0 || $2 > RT_TABLEID_MAX) {
1145				yyerror("invalid rtable id");
1146				YYERROR;
1147			}
1148			antispoof_opts.rtableid = $2;
1149		}
1150		;
1151
1152not		: '!'		{ $$ = 1; }
1153		| /* empty */	{ $$ = 0; }
1154		;
1155
1156tabledef	: TABLE '<' STRING '>' table_opts {
1157			struct node_host	 *h, *nh;
1158			struct node_tinit	 *ti, *nti;
1159
1160			if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1161				yyerror("table name too long, max %d chars",
1162				    PF_TABLE_NAME_SIZE - 1);
1163				free($3);
1164				YYERROR;
1165			}
1166			if (process_tabledef($3, &$5)) {
1167				free($3);
1168				YYERROR;
1169			}
1170			free($3);
1171			for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1172			    ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1173				if (ti->file)
1174					free(ti->file);
1175				for (h = ti->host; h != NULL; h = nh) {
1176					nh = h->next;
1177					free(h);
1178				}
1179				nti = SIMPLEQ_NEXT(ti, entries);
1180				free(ti);
1181			}
1182		}
1183		;
1184
1185table_opts	:	{
1186			bzero(&table_opts, sizeof table_opts);
1187			SIMPLEQ_INIT(&table_opts.init_nodes);
1188		}
1189		    table_opts_l
1190			{ $$ = table_opts; }
1191		| /* empty */
1192			{
1193			bzero(&table_opts, sizeof table_opts);
1194			SIMPLEQ_INIT(&table_opts.init_nodes);
1195			$$ = table_opts;
1196		}
1197		;
1198
1199table_opts_l	: table_opts_l table_opt
1200		| table_opt
1201		;
1202
1203table_opt	: STRING		{
1204			if (!strcmp($1, "const"))
1205				table_opts.flags |= PFR_TFLAG_CONST;
1206			else if (!strcmp($1, "persist"))
1207				table_opts.flags |= PFR_TFLAG_PERSIST;
1208			else if (!strcmp($1, "counters"))
1209				table_opts.flags |= PFR_TFLAG_COUNTERS;
1210			else {
1211				yyerror("invalid table option '%s'", $1);
1212				free($1);
1213				YYERROR;
1214			}
1215			free($1);
1216		}
1217		| '{' optnl '}'		{ table_opts.init_addr = 1; }
1218		| '{' optnl table_host_list '}'	{
1219			struct node_host	*n;
1220			struct node_tinit	*ti;
1221
1222			for (n = $3; n != NULL; n = n->next) {
1223				switch (n->addr.type) {
1224				case PF_ADDR_ADDRMASK:
1225					continue; /* ok */
1226				case PF_ADDR_RANGE:
1227					yyerror("address ranges are not "
1228					    "permitted inside tables");
1229					break;
1230				case PF_ADDR_DYNIFTL:
1231					yyerror("dynamic addresses are not "
1232					    "permitted inside tables");
1233					break;
1234				case PF_ADDR_TABLE:
1235					yyerror("tables cannot contain tables");
1236					break;
1237				case PF_ADDR_NOROUTE:
1238					yyerror("\"no-route\" is not permitted "
1239					    "inside tables");
1240					break;
1241				case PF_ADDR_URPFFAILED:
1242					yyerror("\"urpf-failed\" is not "
1243					    "permitted inside tables");
1244					break;
1245				default:
1246					yyerror("unknown address type %d",
1247					    n->addr.type);
1248				}
1249				YYERROR;
1250			}
1251			if (!(ti = calloc(1, sizeof(*ti))))
1252				err(1, "table_opt: calloc");
1253			ti->host = $3;
1254			SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1255			    entries);
1256			table_opts.init_addr = 1;
1257		}
1258		| FILENAME STRING	{
1259			struct node_tinit	*ti;
1260
1261			if (!(ti = calloc(1, sizeof(*ti))))
1262				err(1, "table_opt: calloc");
1263			ti->file = $2;
1264			SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1265			    entries);
1266			table_opts.init_addr = 1;
1267		}
1268		;
1269
1270tablespec	: xhost	optweight		{
1271			if ($2 > 0) {
1272				struct node_host	*n;
1273				for (n = $1; n != NULL; n = n->next)
1274					n->weight = $2;
1275			}
1276			$$ = $1;
1277		}
1278		| '{' optnl table_host_list '}'	{ $$ = $3; }
1279		;
1280
1281table_host_list	: tablespec optnl			{ $$ = $1; }
1282		| table_host_list comma tablespec optnl {
1283			$1->tail->next = $3;
1284			$1->tail = $3->tail;
1285			$$ = $1;
1286		}
1287		;
1288
1289altqif		: ALTQ interface queue_opts QUEUE qassign {
1290			struct pf_altq	a;
1291
1292			memset(&a, 0, sizeof(a));
1293			if ($3.scheduler.qtype == ALTQT_NONE) {
1294				yyerror("no scheduler specified!");
1295				YYERROR;
1296			}
1297			a.scheduler = $3.scheduler.qtype;
1298			a.qlimit = $3.qlimit;
1299			a.tbrsize = $3.tbrsize;
1300			if ($5 == NULL) {
1301				yyerror("no child queues specified");
1302				YYERROR;
1303			}
1304			if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1305			    &$3.scheduler))
1306				YYERROR;
1307		}
1308		;
1309
1310queuespec	: QUEUE STRING interface queue_opts qassign {
1311			struct pf_altq	a;
1312
1313			memset(&a, 0, sizeof(a));
1314			if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1315			    sizeof(a.qname)) {
1316				yyerror("queue name too long (max "
1317				    "%d chars)", PF_QNAME_SIZE-1);
1318				free($2);
1319				YYERROR;
1320			}
1321			free($2);
1322			if ($4.tbrsize) {
1323				yyerror("cannot specify tbrsize for queue");
1324				YYERROR;
1325			}
1326			if ($4.priority > 255) {
1327				yyerror("priority out of range: max 255");
1328				YYERROR;
1329			}
1330			a.priority = $4.priority;
1331			a.qlimit = $4.qlimit;
1332			a.scheduler = $4.scheduler.qtype;
1333			if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1334			    &$4.scheduler)) {
1335				yyerror("errors in queue definition");
1336				YYERROR;
1337			}
1338		}
1339		;
1340
1341queue_opts	:	{
1342			bzero(&queue_opts, sizeof queue_opts);
1343			queue_opts.priority = DEFAULT_PRIORITY;
1344			queue_opts.qlimit = DEFAULT_QLIMIT;
1345			queue_opts.scheduler.qtype = ALTQT_NONE;
1346			queue_opts.queue_bwspec.bw_percent = 100;
1347		}
1348		    queue_opts_l
1349			{ $$ = queue_opts; }
1350		| /* empty */ {
1351			bzero(&queue_opts, sizeof queue_opts);
1352			queue_opts.priority = DEFAULT_PRIORITY;
1353			queue_opts.qlimit = DEFAULT_QLIMIT;
1354			queue_opts.scheduler.qtype = ALTQT_NONE;
1355			queue_opts.queue_bwspec.bw_percent = 100;
1356			$$ = queue_opts;
1357		}
1358		;
1359
1360queue_opts_l	: queue_opts_l queue_opt
1361		| queue_opt
1362		;
1363
1364queue_opt	: BANDWIDTH bandwidth	{
1365			if (queue_opts.marker & QOM_BWSPEC) {
1366				yyerror("bandwidth cannot be respecified");
1367				YYERROR;
1368			}
1369			queue_opts.marker |= QOM_BWSPEC;
1370			queue_opts.queue_bwspec = $2;
1371		}
1372		| PRIORITY NUMBER	{
1373			if (queue_opts.marker & QOM_PRIORITY) {
1374				yyerror("priority cannot be respecified");
1375				YYERROR;
1376			}
1377			if ($2 < 0 || $2 > 255) {
1378				yyerror("priority out of range: max 255");
1379				YYERROR;
1380			}
1381			queue_opts.marker |= QOM_PRIORITY;
1382			queue_opts.priority = $2;
1383		}
1384		| QLIMIT NUMBER	{
1385			if (queue_opts.marker & QOM_QLIMIT) {
1386				yyerror("qlimit cannot be respecified");
1387				YYERROR;
1388			}
1389			if ($2 < 0 || $2 > 65535) {
1390				yyerror("qlimit out of range: max 65535");
1391				YYERROR;
1392			}
1393			queue_opts.marker |= QOM_QLIMIT;
1394			queue_opts.qlimit = $2;
1395		}
1396		| scheduler	{
1397			if (queue_opts.marker & QOM_SCHEDULER) {
1398				yyerror("scheduler cannot be respecified");
1399				YYERROR;
1400			}
1401			queue_opts.marker |= QOM_SCHEDULER;
1402			queue_opts.scheduler = $1;
1403		}
1404		| TBRSIZE NUMBER	{
1405			if (queue_opts.marker & QOM_TBRSIZE) {
1406				yyerror("tbrsize cannot be respecified");
1407				YYERROR;
1408			}
1409			if ($2 < 0 || $2 > 65535) {
1410				yyerror("tbrsize too big: max 65535");
1411				YYERROR;
1412			}
1413			queue_opts.marker |= QOM_TBRSIZE;
1414			queue_opts.tbrsize = $2;
1415		}
1416		;
1417
1418bandwidth	: STRING {
1419			double	 bps;
1420			char	*cp;
1421
1422			$$.bw_percent = 0;
1423
1424			bps = strtod($1, &cp);
1425			if (cp != NULL) {
1426				if (!strcmp(cp, "b"))
1427					; /* nothing */
1428				else if (!strcmp(cp, "Kb"))
1429					bps *= 1000;
1430				else if (!strcmp(cp, "Mb"))
1431					bps *= 1000 * 1000;
1432				else if (!strcmp(cp, "Gb"))
1433					bps *= 1000 * 1000 * 1000;
1434				else if (!strcmp(cp, "%")) {
1435					if (bps < 0 || bps > 100) {
1436						yyerror("bandwidth spec "
1437						    "out of range");
1438						free($1);
1439						YYERROR;
1440					}
1441					$$.bw_percent = bps;
1442					bps = 0;
1443				} else {
1444					yyerror("unknown unit %s", cp);
1445					free($1);
1446					YYERROR;
1447				}
1448			}
1449			free($1);
1450			$$.bw_absolute = (u_int32_t)bps;
1451		}
1452		| NUMBER {
1453			if ($1 < 0 || $1 > UINT_MAX) {
1454				yyerror("bandwidth number too big");
1455				YYERROR;
1456			}
1457			$$.bw_percent = 0;
1458			$$.bw_absolute = $1;
1459		}
1460		;
1461
1462scheduler	: CBQ				{
1463			$$.qtype = ALTQT_CBQ;
1464			$$.data.cbq_opts.flags = 0;
1465		}
1466		| CBQ '(' cbqflags_list ')'	{
1467			$$.qtype = ALTQT_CBQ;
1468			$$.data.cbq_opts.flags = $3;
1469		}
1470		| PRIQ				{
1471			$$.qtype = ALTQT_PRIQ;
1472			$$.data.priq_opts.flags = 0;
1473		}
1474		| PRIQ '(' priqflags_list ')'	{
1475			$$.qtype = ALTQT_PRIQ;
1476			$$.data.priq_opts.flags = $3;
1477		}
1478		| HFSC				{
1479			$$.qtype = ALTQT_HFSC;
1480			bzero(&$$.data.hfsc_opts,
1481			    sizeof(struct node_hfsc_opts));
1482		}
1483		| HFSC '(' hfsc_opts ')'	{
1484			$$.qtype = ALTQT_HFSC;
1485			$$.data.hfsc_opts = $3;
1486		}
1487		;
1488
1489cbqflags_list	: cbqflags_item				{ $$ |= $1; }
1490		| cbqflags_list comma cbqflags_item	{ $$ |= $3; }
1491		;
1492
1493cbqflags_item	: STRING	{
1494			if (!strcmp($1, "default"))
1495				$$ = CBQCLF_DEFCLASS;
1496			else if (!strcmp($1, "borrow"))
1497				$$ = CBQCLF_BORROW;
1498			else if (!strcmp($1, "red"))
1499				$$ = CBQCLF_RED;
1500			else if (!strcmp($1, "ecn"))
1501				$$ = CBQCLF_RED|CBQCLF_ECN;
1502			else {
1503				yyerror("unknown cbq flag \"%s\"", $1);
1504				free($1);
1505				YYERROR;
1506			}
1507			free($1);
1508		}
1509		;
1510
1511priqflags_list	: priqflags_item			{ $$ |= $1; }
1512		| priqflags_list comma priqflags_item	{ $$ |= $3; }
1513		;
1514
1515priqflags_item	: STRING	{
1516			if (!strcmp($1, "default"))
1517				$$ = PRCF_DEFAULTCLASS;
1518			else if (!strcmp($1, "red"))
1519				$$ = PRCF_RED;
1520			else if (!strcmp($1, "ecn"))
1521				$$ = PRCF_RED|PRCF_ECN;
1522			else {
1523				yyerror("unknown priq flag \"%s\"", $1);
1524				free($1);
1525				YYERROR;
1526			}
1527			free($1);
1528		}
1529		;
1530
1531hfsc_opts	:	{
1532				bzero(&hfsc_opts,
1533				    sizeof(struct node_hfsc_opts));
1534			}
1535		    hfscopts_list				{
1536			$$ = hfsc_opts;
1537		}
1538		;
1539
1540hfscopts_list	: hfscopts_item
1541		| hfscopts_list comma hfscopts_item
1542		;
1543
1544hfscopts_item	: LINKSHARE bandwidth				{
1545			if (hfsc_opts.linkshare.used) {
1546				yyerror("linkshare already specified");
1547				YYERROR;
1548			}
1549			hfsc_opts.linkshare.m2 = $2;
1550			hfsc_opts.linkshare.used = 1;
1551		}
1552		| LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1553		    {
1554			if ($5 < 0 || $5 > INT_MAX) {
1555				yyerror("timing in curve out of range");
1556				YYERROR;
1557			}
1558			if (hfsc_opts.linkshare.used) {
1559				yyerror("linkshare already specified");
1560				YYERROR;
1561			}
1562			hfsc_opts.linkshare.m1 = $3;
1563			hfsc_opts.linkshare.d = $5;
1564			hfsc_opts.linkshare.m2 = $7;
1565			hfsc_opts.linkshare.used = 1;
1566		}
1567		| REALTIME bandwidth				{
1568			if (hfsc_opts.realtime.used) {
1569				yyerror("realtime already specified");
1570				YYERROR;
1571			}
1572			hfsc_opts.realtime.m2 = $2;
1573			hfsc_opts.realtime.used = 1;
1574		}
1575		| REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1576		    {
1577			if ($5 < 0 || $5 > INT_MAX) {
1578				yyerror("timing in curve out of range");
1579				YYERROR;
1580			}
1581			if (hfsc_opts.realtime.used) {
1582				yyerror("realtime already specified");
1583				YYERROR;
1584			}
1585			hfsc_opts.realtime.m1 = $3;
1586			hfsc_opts.realtime.d = $5;
1587			hfsc_opts.realtime.m2 = $7;
1588			hfsc_opts.realtime.used = 1;
1589		}
1590		| UPPERLIMIT bandwidth				{
1591			if (hfsc_opts.upperlimit.used) {
1592				yyerror("upperlimit already specified");
1593				YYERROR;
1594			}
1595			hfsc_opts.upperlimit.m2 = $2;
1596			hfsc_opts.upperlimit.used = 1;
1597		}
1598		| UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1599		    {
1600			if ($5 < 0 || $5 > INT_MAX) {
1601				yyerror("timing in curve out of range");
1602				YYERROR;
1603			}
1604			if (hfsc_opts.upperlimit.used) {
1605				yyerror("upperlimit already specified");
1606				YYERROR;
1607			}
1608			hfsc_opts.upperlimit.m1 = $3;
1609			hfsc_opts.upperlimit.d = $5;
1610			hfsc_opts.upperlimit.m2 = $7;
1611			hfsc_opts.upperlimit.used = 1;
1612		}
1613		| STRING	{
1614			if (!strcmp($1, "default"))
1615				hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1616			else if (!strcmp($1, "red"))
1617				hfsc_opts.flags |= HFCF_RED;
1618			else if (!strcmp($1, "ecn"))
1619				hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1620			else {
1621				yyerror("unknown hfsc flag \"%s\"", $1);
1622				free($1);
1623				YYERROR;
1624			}
1625			free($1);
1626		}
1627		;
1628
1629qassign		: /* empty */		{ $$ = NULL; }
1630		| qassign_item		{ $$ = $1; }
1631		| '{' optnl qassign_list '}'	{ $$ = $3; }
1632		;
1633
1634qassign_list	: qassign_item optnl		{ $$ = $1; }
1635		| qassign_list comma qassign_item optnl	{
1636			$1->tail->next = $3;
1637			$1->tail = $3;
1638			$$ = $1;
1639		}
1640		;
1641
1642qassign_item	: STRING			{
1643			$$ = calloc(1, sizeof(struct node_queue));
1644			if ($$ == NULL)
1645				err(1, "qassign_item: calloc");
1646			if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
1647			    sizeof($$->queue)) {
1648				yyerror("queue name '%s' too long (max "
1649				    "%d chars)", $1, sizeof($$->queue)-1);
1650				free($1);
1651				free($$);
1652				YYERROR;
1653			}
1654			free($1);
1655			$$->next = NULL;
1656			$$->tail = $$;
1657		}
1658		;
1659
1660pfrule		: action dir logquick interface af proto fromto
1661		    filter_opts
1662		{
1663			struct pf_rule		 r;
1664			struct node_state_opt	*o;
1665			struct node_proto	*proto;
1666			int			 srctrack = 0;
1667			int			 statelock = 0;
1668			int			 adaptive = 0;
1669			int			 defaults = 0;
1670
1671			memset(&r, 0, sizeof(r));
1672			r.action = $1.b1;
1673			switch ($1.b2) {
1674			case PFRULE_RETURNRST:
1675				r.rule_flag |= PFRULE_RETURNRST;
1676				r.return_ttl = $1.w;
1677				break;
1678			case PFRULE_RETURNICMP:
1679				r.rule_flag |= PFRULE_RETURNICMP;
1680				r.return_icmp = $1.w;
1681				r.return_icmp6 = $1.w2;
1682				break;
1683			case PFRULE_RETURN:
1684				r.rule_flag |= PFRULE_RETURN;
1685				r.return_icmp = $1.w;
1686				r.return_icmp6 = $1.w2;
1687				break;
1688			}
1689			r.direction = $2;
1690			r.log = $3.log;
1691			r.logif = $3.logif;
1692			r.quick = $3.quick;
1693			r.prob = $8.prob;
1694			r.rtableid = $8.rtableid;
1695
1696			if ($8.nodf)
1697				r.scrub_flags |= PFSTATE_NODF;
1698			if ($8.randomid)
1699				r.scrub_flags |= PFSTATE_RANDOMID;
1700			if ($8.minttl)
1701				r.min_ttl = $8.minttl;
1702			if ($8.max_mss)
1703				r.max_mss = $8.max_mss;
1704			if ($8.marker & FOM_SETTOS) {
1705				r.scrub_flags |= PFSTATE_SETTOS;
1706				r.set_tos = $8.settos;
1707			}
1708			if ($8.marker & FOM_SCRUB_TCP)
1709				r.scrub_flags |= PFSTATE_SCRUB_TCP;
1710			if ($8.marker & FOM_PRIO) {
1711				r.prio[0] = $8.prio[0];
1712				r.prio[1] = $8.prio[1];
1713			} else
1714				r.prio[0] = r.prio[1] = PF_PRIO_NOTSET;
1715			if ($8.marker & FOM_ONCE)
1716				r.rule_flag |= PFRULE_ONCE;
1717
1718			if ($8.marker & FOM_AFTO) {
1719				if (!$5) {
1720					yyerror("must indicate source address "
1721					    "family with af-to");
1722					YYERROR;
1723				}
1724				if ($5 == $8.nat.af) {
1725					yyerror("incorrect address family "
1726					    "translation");
1727					YYERROR;
1728				}
1729			}
1730			r.af = $5;
1731
1732			if ($8.tag)
1733				if (strlcpy(r.tagname, $8.tag,
1734				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1735					yyerror("tag too long, max %u chars",
1736					    PF_TAG_NAME_SIZE - 1);
1737					YYERROR;
1738				}
1739			if ($8.match_tag)
1740				if (strlcpy(r.match_tagname, $8.match_tag,
1741				    PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1742					yyerror("tag too long, max %u chars",
1743					    PF_TAG_NAME_SIZE - 1);
1744					YYERROR;
1745				}
1746			r.match_tag_not = $8.match_tag_not;
1747			if (rule_label(&r, $8.label))
1748				YYERROR;
1749			free($8.label);
1750			r.flags = $8.flags.b1;
1751			r.flagset = $8.flags.b2;
1752			if (($8.flags.b1 & $8.flags.b2) != $8.flags.b1) {
1753				yyerror("flags always false");
1754				YYERROR;
1755			}
1756			if ($8.flags.b1 || $8.flags.b2 || $7.src_os) {
1757				for (proto = $6; proto != NULL &&
1758				    proto->proto != IPPROTO_TCP;
1759				    proto = proto->next)
1760					;	/* nothing */
1761				if (proto == NULL && $6 != NULL) {
1762					if ($8.flags.b1 || $8.flags.b2)
1763						yyerror(
1764						    "flags only apply to tcp");
1765					if ($7.src_os)
1766						yyerror(
1767						    "OS fingerprinting only "
1768						    "apply to tcp");
1769					YYERROR;
1770				}
1771#if 0
1772				if (($8.flags.b1 & parse_flags("S")) == 0 &&
1773				    $7.src_os) {
1774					yyerror("OS fingerprinting requires "
1775					    "the SYN TCP flag (flags S/SA)");
1776					YYERROR;
1777				}
1778#endif
1779			}
1780
1781			r.tos = $8.tos;
1782			r.keep_state = $8.keep.action;
1783			o = $8.keep.options;
1784
1785			/* 'keep state' by default on pass rules. */
1786			if (!r.keep_state && !r.action &&
1787			    !($8.marker & FOM_KEEP)) {
1788				r.keep_state = PF_STATE_NORMAL;
1789				o = keep_state_defaults;
1790				defaults = 1;
1791			}
1792
1793			while (o) {
1794				struct node_state_opt	*p = o;
1795
1796				switch (o->type) {
1797				case PF_STATE_OPT_MAX:
1798					if (r.max_states) {
1799						yyerror("state option 'max' "
1800						    "multiple definitions");
1801						YYERROR;
1802					}
1803					r.max_states = o->data.max_states;
1804					break;
1805				case PF_STATE_OPT_NOSYNC:
1806					if (r.rule_flag & PFRULE_NOSYNC) {
1807						yyerror("state option 'sync' "
1808						    "multiple definitions");
1809						YYERROR;
1810					}
1811					r.rule_flag |= PFRULE_NOSYNC;
1812					break;
1813				case PF_STATE_OPT_SRCTRACK:
1814					if (srctrack) {
1815						yyerror("state option "
1816						    "'source-track' "
1817						    "multiple definitions");
1818						YYERROR;
1819					}
1820					srctrack =  o->data.src_track;
1821					r.rule_flag |= PFRULE_SRCTRACK;
1822					break;
1823				case PF_STATE_OPT_MAX_SRC_STATES:
1824					if (r.max_src_states) {
1825						yyerror("state option "
1826						    "'max-src-states' "
1827						    "multiple definitions");
1828						YYERROR;
1829					}
1830					if (o->data.max_src_states == 0) {
1831						yyerror("'max-src-states' must "
1832						    "be > 0");
1833						YYERROR;
1834					}
1835					r.max_src_states =
1836					    o->data.max_src_states;
1837					r.rule_flag |= PFRULE_SRCTRACK;
1838					break;
1839				case PF_STATE_OPT_OVERLOAD:
1840					if (r.overload_tblname[0]) {
1841						yyerror("multiple 'overload' "
1842						    "table definitions");
1843						YYERROR;
1844					}
1845					if (strlcpy(r.overload_tblname,
1846					    o->data.overload.tblname,
1847					    PF_TABLE_NAME_SIZE) >=
1848					    PF_TABLE_NAME_SIZE) {
1849						yyerror("state option: "
1850						    "strlcpy");
1851						YYERROR;
1852					}
1853					r.flush = o->data.overload.flush;
1854					break;
1855				case PF_STATE_OPT_MAX_SRC_CONN:
1856					if (r.max_src_conn) {
1857						yyerror("state option "
1858						    "'max-src-conn' "
1859						    "multiple definitions");
1860						YYERROR;
1861					}
1862					if (o->data.max_src_conn == 0) {
1863						yyerror("'max-src-conn' "
1864						    "must be > 0");
1865						YYERROR;
1866					}
1867					r.max_src_conn =
1868					    o->data.max_src_conn;
1869					r.rule_flag |= PFRULE_SRCTRACK |
1870					    PFRULE_RULESRCTRACK;
1871					break;
1872				case PF_STATE_OPT_MAX_SRC_CONN_RATE:
1873					if (r.max_src_conn_rate.limit) {
1874						yyerror("state option "
1875						    "'max-src-conn-rate' "
1876						    "multiple definitions");
1877						YYERROR;
1878					}
1879					if (!o->data.max_src_conn_rate.limit ||
1880					    !o->data.max_src_conn_rate.seconds) {
1881						yyerror("'max-src-conn-rate' "
1882						    "values must be > 0");
1883						YYERROR;
1884					}
1885					if (o->data.max_src_conn_rate.limit >
1886					    PF_THRESHOLD_MAX) {
1887						yyerror("'max-src-conn-rate' "
1888						    "maximum rate must be < %u",
1889						    PF_THRESHOLD_MAX);
1890						YYERROR;
1891					}
1892					r.max_src_conn_rate.limit =
1893					    o->data.max_src_conn_rate.limit;
1894					r.max_src_conn_rate.seconds =
1895					    o->data.max_src_conn_rate.seconds;
1896					r.rule_flag |= PFRULE_SRCTRACK |
1897					    PFRULE_RULESRCTRACK;
1898					break;
1899				case PF_STATE_OPT_MAX_SRC_NODES:
1900					if (r.max_src_nodes) {
1901						yyerror("state option "
1902						    "'max-src-nodes' "
1903						    "multiple definitions");
1904						YYERROR;
1905					}
1906					if (o->data.max_src_nodes == 0) {
1907						yyerror("'max-src-nodes' must "
1908						    "be > 0");
1909						YYERROR;
1910					}
1911					r.max_src_nodes =
1912					    o->data.max_src_nodes;
1913					r.rule_flag |= PFRULE_SRCTRACK |
1914					    PFRULE_RULESRCTRACK;
1915					break;
1916				case PF_STATE_OPT_STATELOCK:
1917					if (statelock) {
1918						yyerror("state locking option: "
1919						    "multiple definitions");
1920						YYERROR;
1921					}
1922					statelock = 1;
1923					r.rule_flag |= o->data.statelock;
1924					break;
1925				case PF_STATE_OPT_SLOPPY:
1926					if (r.rule_flag & PFRULE_STATESLOPPY) {
1927						yyerror("state sloppy option: "
1928						    "multiple definitions");
1929						YYERROR;
1930					}
1931					r.rule_flag |= PFRULE_STATESLOPPY;
1932					break;
1933				case PF_STATE_OPT_PFLOW:
1934					if (r.rule_flag & PFRULE_PFLOW) {
1935						yyerror("state pflow "
1936						    "option: multiple "
1937						    "definitions");
1938						YYERROR;
1939					}
1940					r.rule_flag |= PFRULE_PFLOW;
1941					break;
1942				case PF_STATE_OPT_TIMEOUT:
1943					if (o->data.timeout.number ==
1944					    PFTM_ADAPTIVE_START ||
1945					    o->data.timeout.number ==
1946					    PFTM_ADAPTIVE_END)
1947						adaptive = 1;
1948					if (r.timeout[o->data.timeout.number]) {
1949						yyerror("state timeout %s "
1950						    "multiple definitions",
1951						    pf_timeouts[o->data.
1952						    timeout.number].name);
1953						YYERROR;
1954					}
1955					r.timeout[o->data.timeout.number] =
1956					    o->data.timeout.seconds;
1957				}
1958				o = o->next;
1959				if (!defaults)
1960					free(p);
1961			}
1962
1963			/* 'flags S/SA' by default on stateful rules */
1964			if (!r.action && !r.flags && !r.flagset &&
1965			    !$8.fragment && !($8.marker & FOM_FLAGS) &&
1966			    r.keep_state) {
1967				r.flags = parse_flags("S");
1968				r.flagset =  parse_flags("SA");
1969			}
1970			if (!adaptive && r.max_states) {
1971				r.timeout[PFTM_ADAPTIVE_START] =
1972				    (r.max_states / 10) * 6;
1973				r.timeout[PFTM_ADAPTIVE_END] =
1974				    (r.max_states / 10) * 12;
1975			}
1976			if (r.rule_flag & PFRULE_SRCTRACK) {
1977				if (srctrack == PF_SRCTRACK_GLOBAL &&
1978				    r.max_src_nodes) {
1979					yyerror("'max-src-nodes' is "
1980					    "incompatible with "
1981					    "'source-track global'");
1982					YYERROR;
1983				}
1984				if (srctrack == PF_SRCTRACK_GLOBAL &&
1985				    r.max_src_conn) {
1986					yyerror("'max-src-conn' is "
1987					    "incompatible with "
1988					    "'source-track global'");
1989					YYERROR;
1990				}
1991				if (srctrack == PF_SRCTRACK_GLOBAL &&
1992				    r.max_src_conn_rate.seconds) {
1993					yyerror("'max-src-conn-rate' is "
1994					    "incompatible with "
1995					    "'source-track global'");
1996					YYERROR;
1997				}
1998				if (r.timeout[PFTM_SRC_NODE] <
1999				    r.max_src_conn_rate.seconds)
2000					r.timeout[PFTM_SRC_NODE] =
2001					    r.max_src_conn_rate.seconds;
2002				r.rule_flag |= PFRULE_SRCTRACK;
2003				if (srctrack == PF_SRCTRACK_RULE)
2004					r.rule_flag |= PFRULE_RULESRCTRACK;
2005			}
2006			if (r.keep_state && !statelock)
2007				r.rule_flag |= default_statelock;
2008
2009			if ($8.fragment)
2010				r.rule_flag |= PFRULE_FRAGMENT;
2011			r.allow_opts = $8.allowopts;
2012
2013			decide_address_family($7.src.host, &r.af);
2014			decide_address_family($7.dst.host, &r.af);
2015			r.naf = r.af;
2016
2017			if ($8.route.rt) {
2018				if (!r.direction) {
2019					yyerror("direction must be explicit "
2020					    "with rules that specify routing");
2021					YYERROR;
2022				}
2023				r.rt = $8.route.rt;
2024				r.route.opts = $8.route.pool_opts;
2025				if ($8.route.key != NULL)
2026					memcpy(&r.route.key, $8.route.key,
2027					    sizeof(struct pf_poolhashkey));
2028			}
2029			if (r.rt) {
2030				decide_address_family($8.route.host, &r.af);
2031				if ((r.route.opts & PF_POOL_TYPEMASK) ==
2032				    PF_POOL_NONE && ($8.route.host->next != NULL ||
2033				    $8.route.host->addr.type == PF_ADDR_TABLE ||
2034				    DYNIF_MULTIADDR($8.route.host->addr)))
2035					r.route.opts |= PF_POOL_ROUNDROBIN;
2036				if (((r.route.opts & PF_POOL_TYPEMASK) !=
2037				    PF_POOL_ROUNDROBIN) &&
2038				    ((r.route.opts & PF_POOL_TYPEMASK) !=
2039				    PF_POOL_LEASTSTATES) &&
2040				    disallow_table($8.route.host,
2041				    "tables are only "
2042				    "supported in round-robin or "
2043				    "least-states routing pools"))
2044					YYERROR;
2045				if (((r.route.opts & PF_POOL_TYPEMASK) !=
2046				    PF_POOL_ROUNDROBIN) &&
2047				    ((r.route.opts & PF_POOL_TYPEMASK) !=
2048				    PF_POOL_LEASTSTATES) &&
2049				    disallow_alias($8.route.host,
2050				    "interface (%s) "
2051				    "is only supported in round-robin or "
2052				    "least-states routing pools"))
2053					YYERROR;
2054				if ($8.route.host->next != NULL) {
2055					if (((r.route.opts & PF_POOL_TYPEMASK) !=
2056					    PF_POOL_ROUNDROBIN) &&
2057					    ((r.route.opts & PF_POOL_TYPEMASK) !=
2058					    PF_POOL_LEASTSTATES)) {
2059						yyerror("r.route.opts must "
2060						    "be PF_POOL_ROUNDROBIN "
2061						    "or PF_POOL_LEASTSTATES");
2062						YYERROR;
2063					}
2064				}
2065				/* fake redirspec */
2066				if (($8.rroute.rdr = calloc(1,
2067				    sizeof(*$8.rroute.rdr))) == NULL)
2068					err(1, "$8.rroute.rdr");
2069				$8.rroute.rdr->host = $8.route.host;
2070			}
2071			if ($8.queues.qname != NULL) {
2072				if (strlcpy(r.qname, $8.queues.qname,
2073				    sizeof(r.qname)) >= sizeof(r.qname)) {
2074					yyerror("rule qname too long (max "
2075					    "%d chars)", sizeof(r.qname)-1);
2076					YYERROR;
2077				}
2078				free($8.queues.qname);
2079			}
2080			if ($8.queues.pqname != NULL) {
2081				if (strlcpy(r.pqname, $8.queues.pqname,
2082				    sizeof(r.pqname)) >= sizeof(r.pqname)) {
2083					yyerror("rule pqname too long (max "
2084					    "%d chars)", sizeof(r.pqname)-1);
2085					YYERROR;
2086				}
2087				free($8.queues.pqname);
2088			}
2089			if ((r.divert.port = $8.divert.port)) {
2090				if (r.direction == PF_OUT) {
2091					if ($8.divert.addr) {
2092						yyerror("address specified "
2093						    "for outgoing divert");
2094						YYERROR;
2095					}
2096					bzero(&r.divert.addr,
2097					    sizeof(r.divert.addr));
2098				} else {
2099					if (!$8.divert.addr) {
2100						yyerror("no address specified "
2101						    "for incoming divert");
2102						YYERROR;
2103					}
2104					if ($8.divert.addr->af != r.af) {
2105						yyerror("address family "
2106						    "mismatch for divert");
2107						YYERROR;
2108					}
2109					r.divert.addr =
2110					    $8.divert.addr->addr.v.a.addr;
2111				}
2112			}
2113			r.divert_packet.port = $8.divert_packet.port;
2114
2115			expand_rule(&r, 0, $4, &$8.nat, &$8.rdr, &$8.rroute, $6,
2116			    $7.src_os,
2117			    $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
2118			    $8.uid, $8.gid, $8.rcv, $8.icmpspec, "");
2119		}
2120		;
2121
2122filter_opts	:	{
2123				bzero(&filter_opts, sizeof filter_opts);
2124				filter_opts.rtableid = -1;
2125			}
2126		    filter_opts_l
2127			{ $$ = filter_opts; }
2128		| /* empty */	{
2129			bzero(&filter_opts, sizeof filter_opts);
2130			filter_opts.rtableid = -1;
2131			$$ = filter_opts;
2132		}
2133		;
2134
2135filter_opts_l	: filter_opts_l filter_opt
2136		| filter_opt
2137		;
2138
2139filter_opt	: USER uids {
2140			if (filter_opts.uid)
2141				$2->tail->next = filter_opts.uid;
2142			filter_opts.uid = $2;
2143		}
2144		| GROUP gids {
2145			if (filter_opts.gid)
2146				$2->tail->next = filter_opts.gid;
2147			filter_opts.gid = $2;
2148		}
2149		| flags {
2150			if (filter_opts.marker & FOM_FLAGS) {
2151				yyerror("flags cannot be redefined");
2152				YYERROR;
2153			}
2154			filter_opts.marker |= FOM_FLAGS;
2155			filter_opts.flags.b1 |= $1.b1;
2156			filter_opts.flags.b2 |= $1.b2;
2157			filter_opts.flags.w |= $1.w;
2158			filter_opts.flags.w2 |= $1.w2;
2159		}
2160		| icmpspec {
2161			if (filter_opts.marker & FOM_ICMP) {
2162				yyerror("icmp-type cannot be redefined");
2163				YYERROR;
2164			}
2165			filter_opts.marker |= FOM_ICMP;
2166			filter_opts.icmpspec = $1;
2167		}
2168		| TOS tos {
2169			if (filter_opts.marker & FOM_TOS) {
2170				yyerror("tos cannot be redefined");
2171				YYERROR;
2172			}
2173			filter_opts.marker |= FOM_TOS;
2174			filter_opts.tos = $2;
2175		}
2176		| keep {
2177			if (filter_opts.marker & FOM_KEEP) {
2178				yyerror("modulate or keep cannot be redefined");
2179				YYERROR;
2180			}
2181			filter_opts.marker |= FOM_KEEP;
2182			filter_opts.keep.action = $1.action;
2183			filter_opts.keep.options = $1.options;
2184		}
2185		| FRAGMENT {
2186			filter_opts.fragment = 1;
2187		}
2188		| ALLOWOPTS {
2189			filter_opts.allowopts = 1;
2190		}
2191		| LABEL label	{
2192			if (filter_opts.label) {
2193				yyerror("label cannot be redefined");
2194				YYERROR;
2195			}
2196			filter_opts.label = $2;
2197		}
2198		| QUEUE qname	{
2199			if (filter_opts.queues.qname) {
2200				yyerror("queue cannot be redefined");
2201				YYERROR;
2202			}
2203			filter_opts.queues = $2;
2204		}
2205		| TAG string				{
2206			filter_opts.tag = $2;
2207		}
2208		| not TAGGED string			{
2209			filter_opts.match_tag = $3;
2210			filter_opts.match_tag_not = $1;
2211		}
2212		| PROBABILITY probability		{
2213			double	p;
2214
2215			p = floor($2 * UINT_MAX + 0.5);
2216			if (p < 0.0 || p > UINT_MAX) {
2217				yyerror("invalid probability: %g%%", $2 * 100);
2218				YYERROR;
2219			}
2220			filter_opts.prob = (u_int32_t)p;
2221			if (filter_opts.prob == 0)
2222				filter_opts.prob = 1;
2223		}
2224		| RTABLE NUMBER				{
2225			if ($2 < 0 || $2 > RT_TABLEID_MAX) {
2226				yyerror("invalid rtable id");
2227				YYERROR;
2228			}
2229			filter_opts.rtableid = $2;
2230		}
2231		| DIVERTTO STRING PORT portplain {
2232			if ((filter_opts.divert.addr = host($2)) == NULL) {
2233				yyerror("could not parse divert address: %s",
2234				    $2);
2235				free($2);
2236				YYERROR;
2237			}
2238			free($2);
2239			filter_opts.divert.port = $4.a;
2240			if (!filter_opts.divert.port) {
2241				yyerror("invalid divert port: %u", ntohs($4.a));
2242				YYERROR;
2243			}
2244		}
2245		| DIVERTREPLY {
2246			filter_opts.divert.port = 1;	/* some random value */
2247		}
2248		| DIVERTPACKET PORT number {
2249			/*
2250			 * If IP reassembly was not turned off, also
2251			 * forcibly enable TCP reassembly by default.
2252			 */
2253			if (pf->reassemble & PF_REASS_ENABLED)
2254				filter_opts.marker |= FOM_SCRUB_TCP;
2255
2256			if ($3 < 1 || $3 > 65535) {
2257				yyerror("invalid divert port");
2258				YYERROR;
2259			}
2260
2261			filter_opts.divert_packet.port = htons($3);
2262		}
2263		| SCRUB '(' scrub_opts ')' {
2264			filter_opts.nodf = $3.nodf;
2265			filter_opts.minttl = $3.minttl;
2266			filter_opts.settos = $3.settos;
2267			filter_opts.randomid = $3.randomid;
2268			filter_opts.max_mss = $3.maxmss;
2269			if ($3.reassemble_tcp)
2270				filter_opts.marker |= FOM_SCRUB_TCP;
2271			filter_opts.marker |= $3.marker;
2272		}
2273		| NATTO redirpool pool_opts {
2274			if (filter_opts.nat.rdr) {
2275				yyerror("cannot respecify nat-to/binat-to");
2276				YYERROR;
2277			}
2278			filter_opts.nat.rdr = $2;
2279			memcpy(&filter_opts.nat.pool_opts, &$3,
2280			    sizeof(filter_opts.nat.pool_opts));
2281		}
2282		| AFTO af FROM redirpool pool_opts {
2283			if (filter_opts.nat.rdr) {
2284				yyerror("cannot respecify af-to");
2285				YYERROR;
2286			}
2287			if ($2 == 0) {
2288				yyerror("no address family specified");
2289				YYERROR;
2290			}
2291			if ($4->host->af && $4->host->af != $2) {
2292				yyerror("af-to addresses must be in the "
2293				    "target address family");
2294				YYERROR;
2295			}
2296			filter_opts.nat.af = $2;
2297			filter_opts.nat.rdr = $4;
2298			memcpy(&filter_opts.nat.pool_opts, &$5,
2299			    sizeof(filter_opts.nat.pool_opts));
2300			filter_opts.rdr.rdr =
2301			    calloc(1, sizeof(struct redirection));
2302			bzero(&filter_opts.rdr.pool_opts,
2303			    sizeof(filter_opts.rdr.pool_opts));
2304			filter_opts.marker |= FOM_AFTO;
2305		}
2306		| AFTO af FROM redirpool pool_opts TO redirpool pool_opts {
2307			if (filter_opts.nat.rdr) {
2308				yyerror("cannot respecify af-to");
2309				YYERROR;
2310			}
2311			if ($2 == 0) {
2312				yyerror("no address family specified");
2313				YYERROR;
2314			}
2315			if (($4->host->af && $4->host->af != $2) ||
2316			    ($7->host->af && $7->host->af != $2)) {
2317				yyerror("af-to addresses must be in the "
2318				    "target address family");
2319				YYERROR;
2320			}
2321			filter_opts.nat.af = $2;
2322			filter_opts.nat.rdr = $4;
2323			memcpy(&filter_opts.nat.pool_opts, &$5,
2324			    sizeof(filter_opts.nat.pool_opts));
2325			filter_opts.rdr.af = $2;
2326			filter_opts.rdr.rdr = $7;
2327			memcpy(&filter_opts.nat.pool_opts, &$8,
2328			    sizeof(filter_opts.nat.pool_opts));
2329			filter_opts.marker |= FOM_AFTO;
2330		}
2331		| RDRTO redirpool pool_opts {
2332			if (filter_opts.rdr.rdr) {
2333				yyerror("cannot respecify rdr-to");
2334				YYERROR;
2335			}
2336			filter_opts.rdr.rdr = $2;
2337			memcpy(&filter_opts.rdr.pool_opts, &$3,
2338			    sizeof(filter_opts.rdr.pool_opts));
2339		}
2340		| BINATTO redirpool pool_opts {
2341			if (filter_opts.nat.rdr) {
2342				yyerror("cannot respecify nat-to/binat-to");
2343				YYERROR;
2344			}
2345			filter_opts.nat.rdr = $2;
2346			filter_opts.nat.binat = 1;
2347			memcpy(&filter_opts.nat.pool_opts, &$3,
2348			    sizeof(filter_opts.nat.pool_opts));
2349			filter_opts.nat.pool_opts.staticport = 1;
2350		}
2351		| ROUTETO routespec pool_opts {
2352			filter_opts.route.host = $2;
2353			filter_opts.route.rt = PF_ROUTETO;
2354			filter_opts.route.pool_opts = $3.type | $3.opts;
2355			memcpy(&filter_opts.rroute.pool_opts, &$3,
2356			    sizeof(filter_opts.rroute.pool_opts));
2357			if ($3.key != NULL)
2358				filter_opts.route.key = $3.key;
2359		}
2360		| REPLYTO routespec pool_opts {
2361			filter_opts.route.host = $2;
2362			filter_opts.route.rt = PF_REPLYTO;
2363			filter_opts.route.pool_opts = $3.type | $3.opts;
2364			if ($3.key != NULL)
2365				filter_opts.route.key = $3.key;
2366		}
2367		| DUPTO routespec pool_opts {
2368			filter_opts.route.host = $2;
2369			filter_opts.route.rt = PF_DUPTO;
2370			filter_opts.route.pool_opts = $3.type | $3.opts;
2371			memcpy(&filter_opts.rroute.pool_opts, &$3,
2372			    sizeof(filter_opts.rroute.pool_opts));
2373			if ($3.key != NULL)
2374				filter_opts.route.key = $3.key;
2375		}
2376		| RECEIVEDON if_item {
2377			if (filter_opts.rcv) {
2378				yyerror("cannot respecify received-on");
2379				YYERROR;
2380			}
2381			filter_opts.rcv = $2;
2382		}
2383		| prio {
2384			if (filter_opts.marker & FOM_PRIO) {
2385				yyerror("prio cannot be redefined");
2386				YYERROR;
2387			}
2388			filter_opts.marker |= FOM_PRIO;
2389			filter_opts.prio[0] = $1.b1;
2390			filter_opts.prio[1] = $1.b2;
2391		}
2392		| ONCE {
2393			filter_opts.marker |= FOM_ONCE;
2394		}
2395		;
2396
2397prio		: PRIO NUMBER {
2398			if ($2 < 0 || $2 > IFQ_MAXPRIO) {
2399				yyerror("prio must be 0 - %u", IFQ_MAXPRIO);
2400				YYERROR;
2401			}
2402			$$.b1 = $$.b2 = $2;
2403		}
2404		| PRIO '(' NUMBER comma NUMBER ')' {
2405			if ($3 < 0 || $3 > IFQ_MAXPRIO ||
2406			    $5 < 0 || $5 > IFQ_MAXPRIO) {
2407				yyerror("prio must be 0 - %u", IFQ_MAXPRIO);
2408				YYERROR;
2409			}
2410			$$.b1 = $3;
2411			$$.b2 = $5;
2412		}
2413		;
2414
2415probability	: STRING				{
2416			char	*e;
2417			double	 p = strtod($1, &e);
2418
2419			if (*e == '%') {
2420				p *= 0.01;
2421				e++;
2422			}
2423			if (*e) {
2424				yyerror("invalid probability: %s", $1);
2425				free($1);
2426				YYERROR;
2427			}
2428			free($1);
2429			$$ = p;
2430		}
2431		| NUMBER				{
2432			$$ = (double)$1;
2433		}
2434		;
2435
2436
2437action		: PASS			{ $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
2438		| MATCH			{ $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; }
2439		| BLOCK blockspec	{ $$ = $2; $$.b1 = PF_DROP; }
2440		;
2441
2442blockspec	: /* empty */		{
2443			$$.b2 = blockpolicy;
2444			$$.w = returnicmpdefault;
2445			$$.w2 = returnicmp6default;
2446		}
2447		| DROP			{
2448			$$.b2 = PFRULE_DROP;
2449			$$.w = 0;
2450			$$.w2 = 0;
2451		}
2452		| RETURNRST		{
2453			$$.b2 = PFRULE_RETURNRST;
2454			$$.w = 0;
2455			$$.w2 = 0;
2456		}
2457		| RETURNRST '(' TTL NUMBER ')'	{
2458			if ($4 < 0 || $4 > 255) {
2459				yyerror("illegal ttl value %d", $4);
2460				YYERROR;
2461			}
2462			$$.b2 = PFRULE_RETURNRST;
2463			$$.w = $4;
2464			$$.w2 = 0;
2465		}
2466		| RETURNICMP		{
2467			$$.b2 = PFRULE_RETURNICMP;
2468			$$.w = returnicmpdefault;
2469			$$.w2 = returnicmp6default;
2470		}
2471		| RETURNICMP6		{
2472			$$.b2 = PFRULE_RETURNICMP;
2473			$$.w = returnicmpdefault;
2474			$$.w2 = returnicmp6default;
2475		}
2476		| RETURNICMP '(' reticmpspec ')'	{
2477			$$.b2 = PFRULE_RETURNICMP;
2478			$$.w = $3;
2479			$$.w2 = returnicmpdefault;
2480		}
2481		| RETURNICMP6 '(' reticmp6spec ')'	{
2482			$$.b2 = PFRULE_RETURNICMP;
2483			$$.w = returnicmpdefault;
2484			$$.w2 = $3;
2485		}
2486		| RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2487			$$.b2 = PFRULE_RETURNICMP;
2488			$$.w = $3;
2489			$$.w2 = $5;
2490		}
2491		| RETURN {
2492			$$.b2 = PFRULE_RETURN;
2493			$$.w = returnicmpdefault;
2494			$$.w2 = returnicmp6default;
2495		}
2496		;
2497
2498reticmpspec	: STRING			{
2499			if (!($$ = parseicmpspec($1, AF_INET))) {
2500				free($1);
2501				YYERROR;
2502			}
2503			free($1);
2504		}
2505		| NUMBER			{
2506			u_int8_t		icmptype;
2507
2508			if ($1 < 0 || $1 > 255) {
2509				yyerror("invalid icmp code %lu", $1);
2510				YYERROR;
2511			}
2512			icmptype = returnicmpdefault >> 8;
2513			$$ = (icmptype << 8 | $1);
2514		}
2515		;
2516
2517reticmp6spec	: STRING			{
2518			if (!($$ = parseicmpspec($1, AF_INET6))) {
2519				free($1);
2520				YYERROR;
2521			}
2522			free($1);
2523		}
2524		| NUMBER			{
2525			u_int8_t		icmptype;
2526
2527			if ($1 < 0 || $1 > 255) {
2528				yyerror("invalid icmp code %lu", $1);
2529				YYERROR;
2530			}
2531			icmptype = returnicmp6default >> 8;
2532			$$ = (icmptype << 8 | $1);
2533		}
2534		;
2535
2536dir		: /* empty */			{ $$ = PF_INOUT; }
2537		| IN				{ $$ = PF_IN; }
2538		| OUT				{ $$ = PF_OUT; }
2539		;
2540
2541quick		: /* empty */			{ $$.quick = 0; }
2542		| QUICK				{ $$.quick = 1; }
2543		;
2544
2545logquick	: /* empty */	{ $$.log = 0; $$.quick = 0; $$.logif = 0; }
2546		| log		{ $$ = $1; $$.quick = 0; }
2547		| QUICK		{ $$.quick = 1; $$.log = 0; $$.logif = 0; }
2548		| log QUICK	{ $$ = $1; $$.quick = 1; }
2549		| QUICK log	{ $$ = $2; $$.quick = 1; }
2550		;
2551
2552log		: LOG			{ $$.log = PF_LOG; $$.logif = 0; }
2553		| LOG '(' logopts ')'	{
2554			$$.log = PF_LOG | $3.log;
2555			$$.logif = $3.logif;
2556		}
2557		;
2558
2559logopts		: logopt			{ $$ = $1; }
2560		| logopts comma logopt		{
2561			$$.log = $1.log | $3.log;
2562			$$.logif = $3.logif;
2563			if ($$.logif == 0)
2564				$$.logif = $1.logif;
2565		}
2566		;
2567
2568logopt		: ALL		{ $$.log = PF_LOG_ALL; $$.logif = 0; }
2569		| MATCHES	{ $$.log = PF_LOG_MATCHES; $$.logif = 0; }
2570		| USER		{ $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2571		| GROUP		{ $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2572		| TO string	{
2573			const char	*errstr;
2574			u_int		 i;
2575
2576			$$.log = 0;
2577			if (strncmp($2, "pflog", 5)) {
2578				yyerror("%s: should be a pflog interface", $2);
2579				free($2);
2580				YYERROR;
2581			}
2582			i = strtonum($2 + 5, 0, 255, &errstr);
2583			if (errstr) {
2584				yyerror("%s: %s", $2, errstr);
2585				free($2);
2586				YYERROR;
2587			}
2588			free($2);
2589			$$.logif = i;
2590		}
2591		;
2592
2593interface	: /* empty */			{ $$ = NULL; }
2594		| ON if_item_not		{ $$ = $2; }
2595		| ON '{' optnl if_list '}'	{ $$ = $4; }
2596		;
2597
2598if_list		: if_item_not optnl		{ $$ = $1; }
2599		| if_list comma if_item_not optnl	{
2600			$1->tail->next = $3;
2601			$1->tail = $3;
2602			$$ = $1;
2603		}
2604		;
2605
2606if_item_not	: not if_item			{ $$ = $2; $$->not = $1; }
2607		;
2608
2609if_item		: STRING			{
2610			struct node_host	*n;
2611
2612			$$ = calloc(1, sizeof(struct node_if));
2613			if ($$ == NULL)
2614				err(1, "if_item: calloc");
2615			if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2616			    sizeof($$->ifname)) {
2617				free($1);
2618				free($$);
2619				yyerror("interface name too long");
2620				YYERROR;
2621			}
2622
2623			if ((n = ifa_exists($1)) != NULL)
2624				$$->ifa_flags = n->ifa_flags;
2625
2626			free($1);
2627			$$->not = 0;
2628			$$->next = NULL;
2629			$$->tail = $$;
2630		}
2631		| RDOMAIN NUMBER		{
2632			if ($2 < 0 || $2 > RT_TABLEID_MAX) {
2633				yyerror("rdomain outside range");
2634				YYERROR;
2635			}
2636			$$ = calloc(1, sizeof(struct node_if));
2637			if ($$ == NULL)
2638				err(1, "if_item: calloc");
2639			$$->not = 0;
2640			$$->use_rdomain = 1;
2641			$$->rdomain = $2;
2642			$$->next = NULL;
2643			$$->tail = $$;
2644		}
2645		;
2646
2647af		: /* empty */			{ $$ = 0; }
2648		| INET				{ $$ = AF_INET; }
2649		| INET6				{ $$ = AF_INET6; }
2650		;
2651
2652proto		: /* empty */				{ $$ = NULL; }
2653		| PROTO proto_item			{ $$ = $2; }
2654		| PROTO '{' optnl proto_list '}'	{ $$ = $4; }
2655		;
2656
2657proto_list	: proto_item optnl		{ $$ = $1; }
2658		| proto_list comma proto_item optnl	{
2659			$1->tail->next = $3;
2660			$1->tail = $3;
2661			$$ = $1;
2662		}
2663		;
2664
2665proto_item	: protoval			{
2666			u_int8_t	pr;
2667
2668			pr = (u_int8_t)$1;
2669			if (pr == 0) {
2670				yyerror("proto 0 cannot be used");
2671				YYERROR;
2672			}
2673			$$ = calloc(1, sizeof(struct node_proto));
2674			if ($$ == NULL)
2675				err(1, "proto_item: calloc");
2676			$$->proto = pr;
2677			$$->next = NULL;
2678			$$->tail = $$;
2679		}
2680		;
2681
2682protoval	: STRING			{
2683			struct protoent	*p;
2684
2685			p = getprotobyname($1);
2686			if (p == NULL) {
2687				yyerror("unknown protocol %s", $1);
2688				free($1);
2689				YYERROR;
2690			}
2691			$$ = p->p_proto;
2692			free($1);
2693		}
2694		| NUMBER			{
2695			if ($1 < 0 || $1 > 255) {
2696				yyerror("protocol outside range");
2697				YYERROR;
2698			}
2699		}
2700		;
2701
2702fromto		: ALL				{
2703			$$.src.host = NULL;
2704			$$.src.port = NULL;
2705			$$.dst.host = NULL;
2706			$$.dst.port = NULL;
2707			$$.src_os = NULL;
2708		}
2709		| from os to			{
2710			$$.src = $1;
2711			$$.src_os = $2;
2712			$$.dst = $3;
2713		}
2714		;
2715
2716os		: /* empty */			{ $$ = NULL; }
2717		| OS xos			{ $$ = $2; }
2718		| OS '{' optnl os_list '}'	{ $$ = $4; }
2719		;
2720
2721xos		: STRING {
2722			$$ = calloc(1, sizeof(struct node_os));
2723			if ($$ == NULL)
2724				err(1, "os: calloc");
2725			$$->os = $1;
2726			$$->tail = $$;
2727		}
2728		;
2729
2730os_list		: xos optnl 			{ $$ = $1; }
2731		| os_list comma xos optnl	{
2732			$1->tail->next = $3;
2733			$1->tail = $3;
2734			$$ = $1;
2735		}
2736		;
2737
2738from		: /* empty */			{
2739			$$.host = NULL;
2740			$$.port = NULL;
2741		}
2742		| FROM ipportspec		{
2743			$$ = $2;
2744		}
2745		;
2746
2747to		: /* empty */			{
2748			$$.host = NULL;
2749			$$.port = NULL;
2750		}
2751		| TO ipportspec		{
2752			if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
2753			    "not permitted in a destination address"))
2754				YYERROR;
2755			$$ = $2;
2756		}
2757		;
2758
2759ipportspec	: ipspec			{
2760			$$.host = $1;
2761			$$.port = NULL;
2762		}
2763		| ipspec PORT portspec		{
2764			$$.host = $1;
2765			$$.port = $3;
2766		}
2767		| PORT portspec			{
2768			$$.host = NULL;
2769			$$.port = $2;
2770		}
2771		;
2772
2773optnl		: '\n' optnl
2774		| /* empty */
2775		;
2776
2777ipspec		: ANY				{ $$ = NULL; }
2778		| xhost				{ $$ = $1; }
2779		| '{' optnl host_list '}'	{ $$ = $3; }
2780		;
2781
2782
2783host_list	: ipspec optnl			{ $$ = $1; }
2784		| host_list comma ipspec optnl	{
2785			if ($1 == NULL) {
2786				freehostlist($3);
2787				$$ = $1;
2788			} else if ($3 == NULL) {
2789				freehostlist($1);
2790				$$ = $3;
2791			} else {
2792				$1->tail->next = $3;
2793				$1->tail = $3->tail;
2794				$$ = $1;
2795			}
2796		}
2797		;
2798
2799xhost		: not host			{
2800			struct node_host	*n;
2801
2802			for (n = $2; n != NULL; n = n->next)
2803				n->not = $1;
2804			$$ = $2;
2805		}
2806		| not NOROUTE			{
2807			$$ = calloc(1, sizeof(struct node_host));
2808			if ($$ == NULL)
2809				err(1, "xhost: calloc");
2810			$$->addr.type = PF_ADDR_NOROUTE;
2811			$$->next = NULL;
2812			$$->not = $1;
2813			$$->tail = $$;
2814		}
2815		| not URPFFAILED		{
2816			$$ = calloc(1, sizeof(struct node_host));
2817			if ($$ == NULL)
2818				err(1, "xhost: calloc");
2819			$$->addr.type = PF_ADDR_URPFFAILED;
2820			$$->next = NULL;
2821			$$->not = $1;
2822			$$->tail = $$;
2823		}
2824		;
2825
2826optweight	: WEIGHT NUMBER			{
2827			if ($2 < 1 || $2 > USHRT_MAX) {
2828				yyerror("weight out of range");
2829				YYERROR;
2830			}
2831			$$ = $2;
2832		}
2833		| /* empty */ { $$ = 0; }
2834		;
2835
2836host		: STRING			{
2837			if (($$ = host($1)) == NULL)	{
2838				/* error. "any" is handled elsewhere */
2839				free($1);
2840				yyerror("could not parse host specification");
2841				YYERROR;
2842			}
2843			free($1);
2844
2845		}
2846		| STRING '-' STRING		{
2847			struct node_host *b, *e;
2848
2849			if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
2850				free($1);
2851				free($3);
2852				yyerror("could not parse host specification");
2853				YYERROR;
2854			}
2855			if (b->af != e->af ||
2856			    b->addr.type != PF_ADDR_ADDRMASK ||
2857			    e->addr.type != PF_ADDR_ADDRMASK ||
2858			    unmask(&b->addr.v.a.mask, b->af) !=
2859			    (b->af == AF_INET ? 32 : 128) ||
2860			    unmask(&e->addr.v.a.mask, e->af) !=
2861			    (e->af == AF_INET ? 32 : 128) ||
2862			    b->next != NULL || b->not ||
2863			    e->next != NULL || e->not) {
2864				free(b);
2865				free(e);
2866				free($1);
2867				free($3);
2868				yyerror("invalid address range");
2869				YYERROR;
2870			}
2871			memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
2872			    sizeof(b->addr.v.a.mask));
2873			b->addr.type = PF_ADDR_RANGE;
2874			$$ = b;
2875			free(e);
2876			free($1);
2877			free($3);
2878		}
2879		| STRING '/' NUMBER		{
2880			char	*buf;
2881
2882			if (asprintf(&buf, "%s/%lld", $1, $3) == -1)
2883				err(1, "host: asprintf");
2884			free($1);
2885			if (($$ = host(buf)) == NULL)	{
2886				/* error. "any" is handled elsewhere */
2887				free(buf);
2888				yyerror("could not parse host specification");
2889				YYERROR;
2890			}
2891			free(buf);
2892		}
2893		| NUMBER '/' NUMBER		{
2894			char	*buf;
2895
2896			/* ie. for 10/8 parsing */
2897			if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
2898				err(1, "host: asprintf");
2899			if (($$ = host(buf)) == NULL)	{
2900				/* error. "any" is handled elsewhere */
2901				free(buf);
2902				yyerror("could not parse host specification");
2903				YYERROR;
2904			}
2905			free(buf);
2906		}
2907		| dynaddr
2908		| dynaddr '/' NUMBER		{
2909			struct node_host	*n;
2910
2911			if ($3 < 0 || $3 > 128) {
2912				yyerror("bit number too big");
2913				YYERROR;
2914			}
2915			$$ = $1;
2916			for (n = $1; n != NULL; n = n->next)
2917				set_ipmask(n, $3);
2918		}
2919		| '<' STRING '>'	{
2920			if (strlen($2) >= PF_TABLE_NAME_SIZE) {
2921				yyerror("table name '%s' too long", $2);
2922				free($2);
2923				YYERROR;
2924			}
2925			$$ = calloc(1, sizeof(struct node_host));
2926			if ($$ == NULL)
2927				err(1, "host: calloc");
2928			$$->addr.type = PF_ADDR_TABLE;
2929			if (strlcpy($$->addr.v.tblname, $2,
2930			    sizeof($$->addr.v.tblname)) >=
2931			    sizeof($$->addr.v.tblname))
2932				errx(1, "host: strlcpy");
2933			free($2);
2934			$$->next = NULL;
2935			$$->tail = $$;
2936		}
2937		| ROUTE	STRING		{
2938			$$ = calloc(1, sizeof(struct node_host));
2939			if ($$ == NULL) {
2940				free($2);
2941				err(1, "host: calloc");
2942			}
2943			$$->addr.type = PF_ADDR_RTLABEL;
2944			if (strlcpy($$->addr.v.rtlabelname, $2,
2945			    sizeof($$->addr.v.rtlabelname)) >=
2946			    sizeof($$->addr.v.rtlabelname)) {
2947				yyerror("route label too long, max %u chars",
2948				    sizeof($$->addr.v.rtlabelname) - 1);
2949				free($2);
2950				free($$);
2951				YYERROR;
2952			}
2953			$$->next = NULL;
2954			$$->tail = $$;
2955			free($2);
2956		}
2957		;
2958
2959number		: NUMBER
2960		| STRING		{
2961			u_long	ulval;
2962
2963			if (atoul($1, &ulval) == -1) {
2964				yyerror("%s is not a number", $1);
2965				free($1);
2966				YYERROR;
2967			} else
2968				$$ = ulval;
2969			free($1);
2970		}
2971		;
2972
2973dynaddr		: '(' STRING ')'		{
2974			int	 flags = 0;
2975			char	*p, *op;
2976
2977			op = $2;
2978			if (!isalpha(op[0])) {
2979				yyerror("invalid interface name '%s'", op);
2980				free(op);
2981				YYERROR;
2982			}
2983			while ((p = strrchr($2, ':')) != NULL) {
2984				if (!strcmp(p+1, "network"))
2985					flags |= PFI_AFLAG_NETWORK;
2986				else if (!strcmp(p+1, "broadcast"))
2987					flags |= PFI_AFLAG_BROADCAST;
2988				else if (!strcmp(p+1, "peer"))
2989					flags |= PFI_AFLAG_PEER;
2990				else if (!strcmp(p+1, "0"))
2991					flags |= PFI_AFLAG_NOALIAS;
2992				else {
2993					yyerror("interface %s has bad modifier",
2994					    $2);
2995					free(op);
2996					YYERROR;
2997				}
2998				*p = '\0';
2999			}
3000			if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3001				free(op);
3002				yyerror("illegal combination of "
3003				    "interface modifiers");
3004				YYERROR;
3005			}
3006			$$ = calloc(1, sizeof(struct node_host));
3007			if ($$ == NULL)
3008				err(1, "address: calloc");
3009			$$->af = 0;
3010			set_ipmask($$, 128);
3011			$$->addr.type = PF_ADDR_DYNIFTL;
3012			$$->addr.iflags = flags;
3013			if (strlcpy($$->addr.v.ifname, $2,
3014			    sizeof($$->addr.v.ifname)) >=
3015			    sizeof($$->addr.v.ifname)) {
3016				free(op);
3017				free($$);
3018				yyerror("interface name too long");
3019				YYERROR;
3020			}
3021			free(op);
3022			$$->next = NULL;
3023			$$->tail = $$;
3024		}
3025		;
3026
3027portspec	: port_item			{ $$ = $1; }
3028		| '{' optnl port_list '}'	{ $$ = $3; }
3029		;
3030
3031port_list	: port_item optnl		{ $$ = $1; }
3032		| port_list comma port_item optnl	{
3033			$1->tail->next = $3;
3034			$1->tail = $3;
3035			$$ = $1;
3036		}
3037		;
3038
3039port_item	: portrange			{
3040			$$ = calloc(1, sizeof(struct node_port));
3041			if ($$ == NULL)
3042				err(1, "port_item: calloc");
3043			$$->port[0] = $1.a;
3044			$$->port[1] = $1.b;
3045			if ($1.t)
3046				$$->op = PF_OP_RRG;
3047			else
3048				$$->op = PF_OP_EQ;
3049			$$->next = NULL;
3050			$$->tail = $$;
3051		}
3052		| unaryop portrange	{
3053			if ($2.t) {
3054				yyerror("':' cannot be used with an other "
3055				    "port operator");
3056				YYERROR;
3057			}
3058			$$ = calloc(1, sizeof(struct node_port));
3059			if ($$ == NULL)
3060				err(1, "port_item: calloc");
3061			$$->port[0] = $2.a;
3062			$$->port[1] = $2.b;
3063			$$->op = $1;
3064			$$->next = NULL;
3065			$$->tail = $$;
3066		}
3067		| portrange PORTBINARY portrange	{
3068			if ($1.t || $3.t) {
3069				yyerror("':' cannot be used with an other "
3070				    "port operator");
3071				YYERROR;
3072			}
3073			$$ = calloc(1, sizeof(struct node_port));
3074			if ($$ == NULL)
3075				err(1, "port_item: calloc");
3076			$$->port[0] = $1.a;
3077			$$->port[1] = $3.a;
3078			$$->op = $2;
3079			$$->next = NULL;
3080			$$->tail = $$;
3081		}
3082		;
3083
3084portplain	: numberstring			{
3085			if (parseport($1, &$$, 0) == -1) {
3086				free($1);
3087				YYERROR;
3088			}
3089			free($1);
3090		}
3091		;
3092
3093portrange	: numberstring			{
3094			if (parseport($1, &$$, PPORT_RANGE) == -1) {
3095				free($1);
3096				YYERROR;
3097			}
3098			free($1);
3099		}
3100		;
3101
3102uids		: uid_item			{ $$ = $1; }
3103		| '{' optnl uid_list '}'	{ $$ = $3; }
3104		;
3105
3106uid_list	: uid_item optnl		{ $$ = $1; }
3107		| uid_list comma uid_item optnl	{
3108			$1->tail->next = $3;
3109			$1->tail = $3;
3110			$$ = $1;
3111		}
3112		;
3113
3114uid_item	: uid				{
3115			$$ = calloc(1, sizeof(struct node_uid));
3116			if ($$ == NULL)
3117				err(1, "uid_item: calloc");
3118			$$->uid[0] = $1;
3119			$$->uid[1] = $1;
3120			$$->op = PF_OP_EQ;
3121			$$->next = NULL;
3122			$$->tail = $$;
3123		}
3124		| unaryop uid			{
3125			if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3126				yyerror("user unknown requires operator = or "
3127				    "!=");
3128				YYERROR;
3129			}
3130			$$ = calloc(1, sizeof(struct node_uid));
3131			if ($$ == NULL)
3132				err(1, "uid_item: calloc");
3133			$$->uid[0] = $2;
3134			$$->uid[1] = $2;
3135			$$->op = $1;
3136			$$->next = NULL;
3137			$$->tail = $$;
3138		}
3139		| uid PORTBINARY uid		{
3140			if ($1 == UID_MAX || $3 == UID_MAX) {
3141				yyerror("user unknown requires operator = or "
3142				    "!=");
3143				YYERROR;
3144			}
3145			$$ = calloc(1, sizeof(struct node_uid));
3146			if ($$ == NULL)
3147				err(1, "uid_item: calloc");
3148			$$->uid[0] = $1;
3149			$$->uid[1] = $3;
3150			$$->op = $2;
3151			$$->next = NULL;
3152			$$->tail = $$;
3153		}
3154		;
3155
3156uid		: STRING			{
3157			if (!strcmp($1, "unknown"))
3158				$$ = UID_MAX;
3159			else {
3160				struct passwd	*pw;
3161
3162				if ((pw = getpwnam($1)) == NULL) {
3163					yyerror("unknown user %s", $1);
3164					free($1);
3165					YYERROR;
3166				}
3167				$$ = pw->pw_uid;
3168			}
3169			free($1);
3170		}
3171		| NUMBER			{
3172			if ($1 < 0 || $1 >= UID_MAX) {
3173				yyerror("illegal uid value %lu", $1);
3174				YYERROR;
3175			}
3176			$$ = $1;
3177		}
3178		;
3179
3180gids		: gid_item			{ $$ = $1; }
3181		| '{' optnl gid_list '}'	{ $$ = $3; }
3182		;
3183
3184gid_list	: gid_item optnl		{ $$ = $1; }
3185		| gid_list comma gid_item optnl	{
3186			$1->tail->next = $3;
3187			$1->tail = $3;
3188			$$ = $1;
3189		}
3190		;
3191
3192gid_item	: gid				{
3193			$$ = calloc(1, sizeof(struct node_gid));
3194			if ($$ == NULL)
3195				err(1, "gid_item: calloc");
3196			$$->gid[0] = $1;
3197			$$->gid[1] = $1;
3198			$$->op = PF_OP_EQ;
3199			$$->next = NULL;
3200			$$->tail = $$;
3201		}
3202		| unaryop gid			{
3203			if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3204				yyerror("group unknown requires operator = or "
3205				    "!=");
3206				YYERROR;
3207			}
3208			$$ = calloc(1, sizeof(struct node_gid));
3209			if ($$ == NULL)
3210				err(1, "gid_item: calloc");
3211			$$->gid[0] = $2;
3212			$$->gid[1] = $2;
3213			$$->op = $1;
3214			$$->next = NULL;
3215			$$->tail = $$;
3216		}
3217		| gid PORTBINARY gid		{
3218			if ($1 == GID_MAX || $3 == GID_MAX) {
3219				yyerror("group unknown requires operator = or "
3220				    "!=");
3221				YYERROR;
3222			}
3223			$$ = calloc(1, sizeof(struct node_gid));
3224			if ($$ == NULL)
3225				err(1, "gid_item: calloc");
3226			$$->gid[0] = $1;
3227			$$->gid[1] = $3;
3228			$$->op = $2;
3229			$$->next = NULL;
3230			$$->tail = $$;
3231		}
3232		;
3233
3234gid		: STRING			{
3235			if (!strcmp($1, "unknown"))
3236				$$ = GID_MAX;
3237			else {
3238				struct group	*grp;
3239
3240				if ((grp = getgrnam($1)) == NULL) {
3241					yyerror("unknown group %s", $1);
3242					free($1);
3243					YYERROR;
3244				}
3245				$$ = grp->gr_gid;
3246			}
3247			free($1);
3248		}
3249		| NUMBER			{
3250			if ($1 < 0 || $1 >= GID_MAX) {
3251				yyerror("illegal gid value %lu", $1);
3252				YYERROR;
3253			}
3254			$$ = $1;
3255		}
3256		;
3257
3258flag		: STRING			{
3259			int	f;
3260
3261			if ((f = parse_flags($1)) < 0) {
3262				yyerror("bad flags %s", $1);
3263				free($1);
3264				YYERROR;
3265			}
3266			free($1);
3267			$$.b1 = f;
3268		}
3269		;
3270
3271flags		: FLAGS flag '/' flag	{ $$.b1 = $2.b1; $$.b2 = $4.b1; }
3272		| FLAGS '/' flag	{ $$.b1 = 0; $$.b2 = $3.b1; }
3273		| FLAGS ANY		{ $$.b1 = 0; $$.b2 = 0; }
3274		;
3275
3276icmpspec	: ICMPTYPE icmp_item			{ $$ = $2; }
3277		| ICMPTYPE '{' optnl icmp_list '}'	{ $$ = $4; }
3278		| ICMP6TYPE icmp6_item			{ $$ = $2; }
3279		| ICMP6TYPE '{' optnl icmp6_list '}'	{ $$ = $4; }
3280		;
3281
3282icmp_list	: icmp_item optnl		{ $$ = $1; }
3283		| icmp_list comma icmp_item optnl {
3284			$1->tail->next = $3;
3285			$1->tail = $3;
3286			$$ = $1;
3287		}
3288		;
3289
3290icmp6_list	: icmp6_item optnl		{ $$ = $1; }
3291		| icmp6_list comma icmp6_item optnl {
3292			$1->tail->next = $3;
3293			$1->tail = $3;
3294			$$ = $1;
3295		}
3296		;
3297
3298icmp_item	: icmptype		{
3299			$$ = calloc(1, sizeof(struct node_icmp));
3300			if ($$ == NULL)
3301				err(1, "icmp_item: calloc");
3302			$$->type = $1;
3303			$$->code = 0;
3304			$$->proto = IPPROTO_ICMP;
3305			$$->next = NULL;
3306			$$->tail = $$;
3307		}
3308		| icmptype CODE STRING	{
3309			const struct icmpcodeent	*p;
3310
3311			if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3312				yyerror("unknown icmp-code %s", $3);
3313				free($3);
3314				YYERROR;
3315			}
3316
3317			free($3);
3318			$$ = calloc(1, sizeof(struct node_icmp));
3319			if ($$ == NULL)
3320				err(1, "icmp_item: calloc");
3321			$$->type = $1;
3322			$$->code = p->code + 1;
3323			$$->proto = IPPROTO_ICMP;
3324			$$->next = NULL;
3325			$$->tail = $$;
3326		}
3327		| icmptype CODE NUMBER	{
3328			if ($3 < 0 || $3 > 255) {
3329				yyerror("illegal icmp-code %lu", $3);
3330				YYERROR;
3331			}
3332			$$ = calloc(1, sizeof(struct node_icmp));
3333			if ($$ == NULL)
3334				err(1, "icmp_item: calloc");
3335			$$->type = $1;
3336			$$->code = $3 + 1;
3337			$$->proto = IPPROTO_ICMP;
3338			$$->next = NULL;
3339			$$->tail = $$;
3340		}
3341		;
3342
3343icmp6_item	: icmp6type		{
3344			$$ = calloc(1, sizeof(struct node_icmp));
3345			if ($$ == NULL)
3346				err(1, "icmp_item: calloc");
3347			$$->type = $1;
3348			$$->code = 0;
3349			$$->proto = IPPROTO_ICMPV6;
3350			$$->next = NULL;
3351			$$->tail = $$;
3352		}
3353		| icmp6type CODE STRING	{
3354			const struct icmpcodeent	*p;
3355
3356			if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3357				yyerror("unknown icmp6-code %s", $3);
3358				free($3);
3359				YYERROR;
3360			}
3361			free($3);
3362
3363			$$ = calloc(1, sizeof(struct node_icmp));
3364			if ($$ == NULL)
3365				err(1, "icmp_item: calloc");
3366			$$->type = $1;
3367			$$->code = p->code + 1;
3368			$$->proto = IPPROTO_ICMPV6;
3369			$$->next = NULL;
3370			$$->tail = $$;
3371		}
3372		| icmp6type CODE NUMBER	{
3373			if ($3 < 0 || $3 > 255) {
3374				yyerror("illegal icmp-code %lu", $3);
3375				YYERROR;
3376			}
3377			$$ = calloc(1, sizeof(struct node_icmp));
3378			if ($$ == NULL)
3379				err(1, "icmp_item: calloc");
3380			$$->type = $1;
3381			$$->code = $3 + 1;
3382			$$->proto = IPPROTO_ICMPV6;
3383			$$->next = NULL;
3384			$$->tail = $$;
3385		}
3386		;
3387
3388icmptype	: STRING			{
3389			const struct icmptypeent	*p;
3390
3391			if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3392				yyerror("unknown icmp-type %s", $1);
3393				free($1);
3394				YYERROR;
3395			}
3396			$$ = p->type + 1;
3397			free($1);
3398		}
3399		| NUMBER			{
3400			if ($1 < 0 || $1 > 255) {
3401				yyerror("illegal icmp-type %lu", $1);
3402				YYERROR;
3403			}
3404			$$ = $1 + 1;
3405		}
3406		;
3407
3408icmp6type	: STRING			{
3409			const struct icmptypeent	*p;
3410
3411			if ((p = geticmptypebyname($1, AF_INET6)) ==
3412			    NULL) {
3413				yyerror("unknown icmp6-type %s", $1);
3414				free($1);
3415				YYERROR;
3416			}
3417			$$ = p->type + 1;
3418			free($1);
3419		}
3420		| NUMBER			{
3421			if ($1 < 0 || $1 > 255) {
3422				yyerror("illegal icmp6-type %lu", $1);
3423				YYERROR;
3424			}
3425			$$ = $1 + 1;
3426		}
3427		;
3428
3429tos	: STRING			{
3430			int val;
3431			if (map_tos($1, &val))
3432				$$ = val;
3433			else if ($1[0] == '0' && $1[1] == 'x')
3434				$$ = strtoul($1, NULL, 16);
3435			else
3436				$$ = 256;		/* flag bad argument */
3437			if ($$ > 255) {
3438				yyerror("illegal tos value %s", $1);
3439				free($1);
3440				YYERROR;
3441			}
3442			free($1);
3443		}
3444		| NUMBER			{
3445			$$ = $1;
3446			if ($$ > 255) {
3447				yyerror("illegal tos value %lu", $1);
3448				YYERROR;
3449			}
3450		}
3451		;
3452
3453sourcetrack	: /* empty */		{ $$ = PF_SRCTRACK; }
3454		| GLOBAL		{ $$ = PF_SRCTRACK_GLOBAL; }
3455		| RULE			{ $$ = PF_SRCTRACK_RULE; }
3456		;
3457
3458statelock	: IFBOUND {
3459			$$ = PFRULE_IFBOUND;
3460		}
3461		| FLOATING {
3462			$$ = 0;
3463		}
3464		;
3465
3466keep		: NO STATE			{
3467			$$.action = 0;
3468			$$.options = NULL;
3469		}
3470		| KEEP STATE state_opt_spec	{
3471			$$.action = PF_STATE_NORMAL;
3472			$$.options = $3;
3473		}
3474		| MODULATE STATE state_opt_spec {
3475			$$.action = PF_STATE_MODULATE;
3476			$$.options = $3;
3477		}
3478		| SYNPROXY STATE state_opt_spec {
3479			$$.action = PF_STATE_SYNPROXY;
3480			$$.options = $3;
3481		}
3482		;
3483
3484flush		: /* empty */			{ $$ = 0; }
3485		| FLUSH				{ $$ = PF_FLUSH; }
3486		| FLUSH GLOBAL			{
3487			$$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3488		}
3489		;
3490
3491state_opt_spec	: '(' state_opt_list ')'	{ $$ = $2; }
3492		| /* empty */			{ $$ = NULL; }
3493		;
3494
3495state_opt_list	: state_opt_item		{ $$ = $1; }
3496		| state_opt_list comma state_opt_item {
3497			$1->tail->next = $3;
3498			$1->tail = $3;
3499			$$ = $1;
3500		}
3501		;
3502
3503state_opt_item	: MAXIMUM NUMBER		{
3504			if ($2 < 0 || $2 > UINT_MAX) {
3505				yyerror("only positive values permitted");
3506				YYERROR;
3507			}
3508			$$ = calloc(1, sizeof(struct node_state_opt));
3509			if ($$ == NULL)
3510				err(1, "state_opt_item: calloc");
3511			$$->type = PF_STATE_OPT_MAX;
3512			$$->data.max_states = $2;
3513			$$->next = NULL;
3514			$$->tail = $$;
3515		}
3516		| NOSYNC				{
3517			$$ = calloc(1, sizeof(struct node_state_opt));
3518			if ($$ == NULL)
3519				err(1, "state_opt_item: calloc");
3520			$$->type = PF_STATE_OPT_NOSYNC;
3521			$$->next = NULL;
3522			$$->tail = $$;
3523		}
3524		| MAXSRCSTATES NUMBER			{
3525			if ($2 < 0 || $2 > UINT_MAX) {
3526				yyerror("only positive values permitted");
3527				YYERROR;
3528			}
3529			$$ = calloc(1, sizeof(struct node_state_opt));
3530			if ($$ == NULL)
3531				err(1, "state_opt_item: calloc");
3532			$$->type = PF_STATE_OPT_MAX_SRC_STATES;
3533			$$->data.max_src_states = $2;
3534			$$->next = NULL;
3535			$$->tail = $$;
3536		}
3537		| MAXSRCCONN NUMBER			{
3538			if ($2 < 0 || $2 > UINT_MAX) {
3539				yyerror("only positive values permitted");
3540				YYERROR;
3541			}
3542			$$ = calloc(1, sizeof(struct node_state_opt));
3543			if ($$ == NULL)
3544				err(1, "state_opt_item: calloc");
3545			$$->type = PF_STATE_OPT_MAX_SRC_CONN;
3546			$$->data.max_src_conn = $2;
3547			$$->next = NULL;
3548			$$->tail = $$;
3549		}
3550		| MAXSRCCONNRATE NUMBER '/' NUMBER	{
3551			if ($2 < 0 || $2 > UINT_MAX ||
3552			    $4 < 0 || $4 > UINT_MAX) {
3553				yyerror("only positive values permitted");
3554				YYERROR;
3555			}
3556			$$ = calloc(1, sizeof(struct node_state_opt));
3557			if ($$ == NULL)
3558				err(1, "state_opt_item: calloc");
3559			$$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3560			$$->data.max_src_conn_rate.limit = $2;
3561			$$->data.max_src_conn_rate.seconds = $4;
3562			$$->next = NULL;
3563			$$->tail = $$;
3564		}
3565		| OVERLOAD '<' STRING '>' flush		{
3566			if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3567				yyerror("table name '%s' too long", $3);
3568				free($3);
3569				YYERROR;
3570			}
3571			$$ = calloc(1, sizeof(struct node_state_opt));
3572			if ($$ == NULL)
3573				err(1, "state_opt_item: calloc");
3574			if (strlcpy($$->data.overload.tblname, $3,
3575			    PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3576				errx(1, "state_opt_item: strlcpy");
3577			free($3);
3578			$$->type = PF_STATE_OPT_OVERLOAD;
3579			$$->data.overload.flush = $5;
3580			$$->next = NULL;
3581			$$->tail = $$;
3582		}
3583		| MAXSRCNODES NUMBER			{
3584			if ($2 < 0 || $2 > UINT_MAX) {
3585				yyerror("only positive values permitted");
3586				YYERROR;
3587			}
3588			$$ = calloc(1, sizeof(struct node_state_opt));
3589			if ($$ == NULL)
3590				err(1, "state_opt_item: calloc");
3591			$$->type = PF_STATE_OPT_MAX_SRC_NODES;
3592			$$->data.max_src_nodes = $2;
3593			$$->next = NULL;
3594			$$->tail = $$;
3595		}
3596		| SOURCETRACK sourcetrack {
3597			$$ = calloc(1, sizeof(struct node_state_opt));
3598			if ($$ == NULL)
3599				err(1, "state_opt_item: calloc");
3600			$$->type = PF_STATE_OPT_SRCTRACK;
3601			$$->data.src_track = $2;
3602			$$->next = NULL;
3603			$$->tail = $$;
3604		}
3605		| statelock {
3606			$$ = calloc(1, sizeof(struct node_state_opt));
3607			if ($$ == NULL)
3608				err(1, "state_opt_item: calloc");
3609			$$->type = PF_STATE_OPT_STATELOCK;
3610			$$->data.statelock = $1;
3611			$$->next = NULL;
3612			$$->tail = $$;
3613		}
3614		| SLOPPY {
3615			$$ = calloc(1, sizeof(struct node_state_opt));
3616			if ($$ == NULL)
3617				err(1, "state_opt_item: calloc");
3618			$$->type = PF_STATE_OPT_SLOPPY;
3619			$$->next = NULL;
3620			$$->tail = $$;
3621		}
3622		| PFLOW {
3623			$$ = calloc(1, sizeof(struct node_state_opt));
3624			if ($$ == NULL)
3625				err(1, "state_opt_item: calloc");
3626			$$->type = PF_STATE_OPT_PFLOW;
3627			$$->next = NULL;
3628			$$->tail = $$;
3629		}
3630		| STRING NUMBER			{
3631			int	i;
3632
3633			if ($2 < 0 || $2 > UINT_MAX) {
3634				yyerror("only positive values permitted");
3635				YYERROR;
3636			}
3637			for (i = 0; pf_timeouts[i].name &&
3638			    strcmp(pf_timeouts[i].name, $1); ++i)
3639				;	/* nothing */
3640			if (!pf_timeouts[i].name) {
3641				yyerror("illegal timeout name %s", $1);
3642				free($1);
3643				YYERROR;
3644			}
3645			if (strchr(pf_timeouts[i].name, '.') == NULL) {
3646				yyerror("illegal state timeout %s", $1);
3647				free($1);
3648				YYERROR;
3649			}
3650			free($1);
3651			$$ = calloc(1, sizeof(struct node_state_opt));
3652			if ($$ == NULL)
3653				err(1, "state_opt_item: calloc");
3654			$$->type = PF_STATE_OPT_TIMEOUT;
3655			$$->data.timeout.number = pf_timeouts[i].timeout;
3656			$$->data.timeout.seconds = $2;
3657			$$->next = NULL;
3658			$$->tail = $$;
3659		}
3660		;
3661
3662label		: STRING			{
3663			$$ = $1;
3664		}
3665		;
3666
3667qname		: STRING				{
3668			$$.qname = $1;
3669			$$.pqname = NULL;
3670		}
3671		| '(' STRING ')'			{
3672			$$.qname = $2;
3673			$$.pqname = NULL;
3674		}
3675		| '(' STRING comma STRING ')'	{
3676			$$.qname = $2;
3677			$$.pqname = $4;
3678		}
3679		;
3680
3681portstar	: numberstring			{
3682			if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3683				free($1);
3684				YYERROR;
3685			}
3686			free($1);
3687		}
3688		;
3689
3690redirspec	: host optweight		{
3691			if ($2 > 0) {
3692				struct node_host	*n;
3693				for (n = $1; n != NULL; n = n->next)
3694					n->weight = $2;
3695			}
3696			$$ = $1;
3697		}
3698		| '{' optnl redir_host_list '}'	{ $$ = $3; }
3699		;
3700
3701redir_host_list	: host optweight optnl			{
3702			if ($1->addr.type != PF_ADDR_ADDRMASK) {
3703				free($1);
3704				yyerror("only addresses can be listed for"
3705				    "redirection pools ");
3706				YYERROR;
3707			}
3708			if ($2 > 0) {
3709				struct node_host	*n;
3710				for (n = $1; n != NULL; n = n->next)
3711					n->weight = $2;
3712			}
3713			$$ = $1;
3714		}
3715		| redir_host_list comma host optweight optnl {
3716			$1->tail->next = $3;
3717			$1->tail = $3->tail;
3718			if ($4 > 0) {
3719				struct node_host	*n;
3720				for (n = $3; n != NULL; n = n->next)
3721					n->weight = $4;
3722			}
3723			$$ = $1;
3724		}
3725		;
3726
3727redirpool	: redirspec		{
3728			$$ = calloc(1, sizeof(struct redirection));
3729			if ($$ == NULL)
3730				err(1, "redirection: calloc");
3731			$$->host = $1;
3732			$$->rport.a = $$->rport.b = $$->rport.t = 0;
3733		}
3734		| redirspec PORT portstar	{
3735			$$ = calloc(1, sizeof(struct redirection));
3736			if ($$ == NULL)
3737				err(1, "redirection: calloc");
3738			$$->host = $1;
3739			$$->rport = $3;
3740		}
3741		;
3742
3743hashkey		: /* empty */
3744		{
3745			$$ = calloc(1, sizeof(struct pf_poolhashkey));
3746			if ($$ == NULL)
3747				err(1, "hashkey: calloc");
3748			$$->key32[0] = arc4random();
3749			$$->key32[1] = arc4random();
3750			$$->key32[2] = arc4random();
3751			$$->key32[3] = arc4random();
3752		}
3753		| string
3754		{
3755			if (!strncmp($1, "0x", 2)) {
3756				if (strlen($1) != 34) {
3757					free($1);
3758					yyerror("hex key must be 128 bits "
3759						"(32 hex digits) long");
3760					YYERROR;
3761				}
3762				$$ = calloc(1, sizeof(struct pf_poolhashkey));
3763				if ($$ == NULL)
3764					err(1, "hashkey: calloc");
3765
3766				if (sscanf($1, "0x%8x%8x%8x%8x",
3767				    &$$->key32[0], &$$->key32[1],
3768				    &$$->key32[2], &$$->key32[3]) != 4) {
3769					free($$);
3770					free($1);
3771					yyerror("invalid hex key");
3772					YYERROR;
3773				}
3774			} else {
3775				MD5_CTX	context;
3776
3777				$$ = calloc(1, sizeof(struct pf_poolhashkey));
3778				if ($$ == NULL)
3779					err(1, "hashkey: calloc");
3780				MD5Init(&context);
3781				MD5Update(&context, (unsigned char *)$1,
3782				    strlen($1));
3783				MD5Final((unsigned char *)$$, &context);
3784				HTONL($$->key32[0]);
3785				HTONL($$->key32[1]);
3786				HTONL($$->key32[2]);
3787				HTONL($$->key32[3]);
3788			}
3789			free($1);
3790		}
3791		;
3792
3793pool_opts	:	{ bzero(&pool_opts, sizeof pool_opts); }
3794		    pool_opts_l
3795			{ $$ = pool_opts; }
3796		| /* empty */	{
3797			bzero(&pool_opts, sizeof pool_opts);
3798			$$ = pool_opts;
3799		}
3800		;
3801
3802pool_opts_l	: pool_opts_l pool_opt
3803		| pool_opt
3804		;
3805
3806pool_opt	: BITMASK	{
3807			if (pool_opts.type) {
3808				yyerror("pool type cannot be redefined");
3809				YYERROR;
3810			}
3811			pool_opts.type =  PF_POOL_BITMASK;
3812		}
3813		| RANDOM	{
3814			if (pool_opts.type) {
3815				yyerror("pool type cannot be redefined");
3816				YYERROR;
3817			}
3818			pool_opts.type = PF_POOL_RANDOM;
3819		}
3820		| SOURCEHASH hashkey {
3821			if (pool_opts.type) {
3822				yyerror("pool type cannot be redefined");
3823				YYERROR;
3824			}
3825			pool_opts.type = PF_POOL_SRCHASH;
3826			pool_opts.key = $2;
3827		}
3828		| ROUNDROBIN	{
3829			if (pool_opts.type) {
3830				yyerror("pool type cannot be redefined");
3831				YYERROR;
3832			}
3833			pool_opts.type = PF_POOL_ROUNDROBIN;
3834		}
3835		| LEASTSTATES	{
3836			if (pool_opts.type) {
3837				yyerror("pool type cannot be redefined");
3838				YYERROR;
3839			}
3840			pool_opts.type = PF_POOL_LEASTSTATES;
3841		}
3842		| STATICPORT	{
3843			if (pool_opts.staticport) {
3844				yyerror("static-port cannot be redefined");
3845				YYERROR;
3846			}
3847			pool_opts.staticport = 1;
3848		}
3849		| STICKYADDRESS	{
3850			if (filter_opts.marker & POM_STICKYADDRESS) {
3851				yyerror("sticky-address cannot be redefined");
3852				YYERROR;
3853			}
3854			pool_opts.marker |= POM_STICKYADDRESS;
3855			pool_opts.opts |= PF_POOL_STICKYADDR;
3856		}
3857		;
3858
3859route_host	: STRING			{
3860			/* try to find @if0 address specs */
3861			if (strrchr($1, '@') != NULL) {
3862				if (($$ = host($1)) == NULL)	{
3863					yyerror("invalid host for route spec");
3864					YYERROR;
3865				}
3866				free($1);
3867			} else {
3868				$$ = calloc(1, sizeof(struct node_host));
3869				if ($$ == NULL)
3870					err(1, "route_host: calloc");
3871				$$->ifname = $1;
3872				$$->addr.type = PF_ADDR_NONE;
3873				set_ipmask($$, 128);
3874				$$->next = NULL;
3875				$$->tail = $$;
3876			}
3877		}
3878		| STRING '/' STRING 		{
3879			char	*buf;
3880
3881			if (asprintf(&buf, "%s/%s", $1, $3) == -1)
3882				err(1, "host: asprintf");
3883			free($1);
3884			if (($$ = host(buf)) == NULL)	{
3885				/* error. "any" is handled elsewhere */
3886				free(buf);
3887				yyerror("could not parse host specification");
3888				YYERROR;
3889			}
3890			free(buf);
3891		}
3892		| '<' STRING '>'	{
3893			if (strlen($2) >= PF_TABLE_NAME_SIZE) {
3894				yyerror("table name '%s' too long", $2);
3895				free($2);
3896				YYERROR;
3897			}
3898			$$ = calloc(1, sizeof(struct node_host));
3899			if ($$ == NULL)
3900				err(1, "host: calloc");
3901			$$->addr.type = PF_ADDR_TABLE;
3902			if (strlcpy($$->addr.v.tblname, $2,
3903			    sizeof($$->addr.v.tblname)) >=
3904			    sizeof($$->addr.v.tblname))
3905				errx(1, "host: strlcpy");
3906			free($2);
3907			$$->next = NULL;
3908			$$->tail = $$;
3909		}
3910		| dynaddr '/' NUMBER		{
3911			struct node_host	*n;
3912
3913			if ($3 < 0 || $3 > 128) {
3914				yyerror("bit number too big");
3915				YYERROR;
3916			}
3917			$$ = $1;
3918			for (n = $1; n != NULL; n = n->next)
3919				set_ipmask(n, $3);
3920		}
3921		| '(' STRING host ')'		{
3922			struct node_host	*n;
3923
3924			$$ = $3;
3925			/* XXX check masks, only full mask should be allowed */
3926			for (n = $3; n != NULL; n = n->next) {
3927				if ($$->ifname) {
3928					yyerror("cannot specify interface twice "
3929					    "in route spec");
3930					YYERROR;
3931				}
3932				if (($$->ifname = strdup($2)) == NULL)
3933					errx(1, "host: strdup");
3934			}
3935			free($2);
3936		}
3937		;
3938
3939route_host_list	: route_host optweight optnl		{
3940			if ($2 > 0) {
3941				struct node_host	*n;
3942				for (n = $1; n != NULL; n = n->next)
3943					n->weight = $2;
3944			}
3945			$$ = $1;
3946		}
3947		| route_host_list comma route_host optweight optnl {
3948			if ($1->af == 0)
3949				$1->af = $3->af;
3950			if ($1->af != $3->af) {
3951				yyerror("all pool addresses must be in the "
3952				    "same address family");
3953				YYERROR;
3954			}
3955			$1->tail->next = $3;
3956			$1->tail = $3->tail;
3957			if ($4 > 0) {
3958				struct node_host	*n;
3959				for (n = $3; n != NULL; n = n->next)
3960					n->weight = $4;
3961			}
3962			$$ = $1;
3963		}
3964		;
3965
3966routespec	: route_host optweight			{
3967			if ($2 > 0) {
3968				struct node_host	*n;
3969				for (n = $1; n != NULL; n = n->next)
3970					n->weight = $2;
3971			}
3972			$$ = $1;
3973		}
3974		| '{' optnl route_host_list '}'	{ $$ = $3; }
3975		;
3976
3977timeout_spec	: STRING NUMBER
3978		{
3979			if ($2 < 0 || $2 > UINT_MAX) {
3980				yyerror("only positive values permitted");
3981				YYERROR;
3982			}
3983			if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
3984				yyerror("unknown timeout %s", $1);
3985				free($1);
3986				YYERROR;
3987			}
3988			free($1);
3989		}
3990		;
3991
3992timeout_list	: timeout_list comma timeout_spec optnl
3993		| timeout_spec optnl
3994		;
3995
3996limit_spec	: STRING NUMBER
3997		{
3998			if ($2 < 0 || $2 > UINT_MAX) {
3999				yyerror("only positive values permitted");
4000				YYERROR;
4001			}
4002			if (pfctl_set_limit(pf, $1, $2) != 0) {
4003				yyerror("unable to set limit %s %u", $1, $2);
4004				free($1);
4005				YYERROR;
4006			}
4007			free($1);
4008		}
4009		;
4010
4011limit_list	: limit_list comma limit_spec optnl
4012		| limit_spec optnl
4013		;
4014
4015comma		: ','
4016		| /* empty */
4017		;
4018
4019yesno		: NO			{ $$ = 0; }
4020		| STRING		{
4021			if (!strcmp($1, "yes"))
4022				$$ = 1;
4023			else {
4024				yyerror("invalid value '%s', expected 'yes' "
4025				    "or 'no'", $1);
4026				free($1);
4027				YYERROR;
4028			}
4029			free($1);
4030		}
4031		;
4032
4033unaryop		: '='		{ $$ = PF_OP_EQ; }
4034		| NE		{ $$ = PF_OP_NE; }
4035		| LE		{ $$ = PF_OP_LE; }
4036		| '<'		{ $$ = PF_OP_LT; }
4037		| GE		{ $$ = PF_OP_GE; }
4038		| '>'		{ $$ = PF_OP_GT; }
4039		;
4040
4041%%
4042
4043int
4044yyerror(const char *fmt, ...)
4045{
4046	va_list		 ap;
4047
4048	file->errors++;
4049	va_start(ap, fmt);
4050	fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4051	vfprintf(stderr, fmt, ap);
4052	fprintf(stderr, "\n");
4053	va_end(ap);
4054	return (0);
4055}
4056
4057int
4058disallow_table(struct node_host *h, const char *fmt)
4059{
4060	for (; h != NULL; h = h->next)
4061		if (h->addr.type == PF_ADDR_TABLE) {
4062			yyerror(fmt, h->addr.v.tblname);
4063			return (1);
4064		}
4065	return (0);
4066}
4067
4068int
4069disallow_urpf_failed(struct node_host *h, const char *fmt)
4070{
4071	for (; h != NULL; h = h->next)
4072		if (h->addr.type == PF_ADDR_URPFFAILED) {
4073			yyerror(fmt);
4074			return (1);
4075		}
4076	return (0);
4077}
4078
4079int
4080disallow_alias(struct node_host *h, const char *fmt)
4081{
4082	for (; h != NULL; h = h->next)
4083		if (DYNIF_MULTIADDR(h->addr)) {
4084			yyerror(fmt, h->addr.v.tblname);
4085			return (1);
4086		}
4087	return (0);
4088}
4089
4090int
4091rule_consistent(struct pf_rule *r, int anchor_call)
4092{
4093	int	problems = 0;
4094
4095	if (r->proto != IPPROTO_TCP && r->os_fingerprint != PF_OSFP_ANY) {
4096		yyerror("os only applies to tcp");
4097		problems++;
4098	}
4099	if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4100	    (r->src.port_op || r->dst.port_op)) {
4101		yyerror("port only applies to tcp/udp");
4102		problems++;
4103	}
4104	if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4105	    r->uid.op) {
4106		yyerror("user only applies to tcp/udp");
4107		problems++;
4108	}
4109	if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4110	    r->gid.op) {
4111		yyerror("group only applies to tcp/udp");
4112		problems++;
4113	}
4114	if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4115	    (r->type || r->code)) {
4116		yyerror("icmp-type/code only applies to icmp");
4117		problems++;
4118	}
4119	if (!r->af && (r->type || r->code)) {
4120		yyerror("must indicate address family with icmp-type/code");
4121		problems++;
4122	}
4123	if (r->overload_tblname[0] &&
4124	    r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4125		yyerror("'overload' requires 'max-src-conn' "
4126		    "or 'max-src-conn-rate'");
4127		problems++;
4128	}
4129	if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4130	    (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4131		yyerror("proto %s doesn't match address family %s",
4132		    r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4133		    r->af == AF_INET ? "inet" : "inet6");
4134		problems++;
4135	}
4136	if (r->allow_opts && r->action != PF_PASS) {
4137		yyerror("allow-opts can only be specified for pass rules");
4138		problems++;
4139	}
4140	if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4141	    r->dst.port_op || r->flagset || r->type || r->code)) {
4142		yyerror("fragments can be filtered only on IP header fields");
4143		problems++;
4144	}
4145	if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4146		yyerror("return-rst can only be applied to TCP rules");
4147		problems++;
4148	}
4149	if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4150		yyerror("max-src-nodes requires 'source-track rule'");
4151		problems++;
4152	}
4153	if (r->action != PF_PASS && r->keep_state) {
4154		yyerror("keep state is great, but only for pass rules");
4155		problems++;
4156	}
4157	if (r->rule_flag & PFRULE_STATESLOPPY &&
4158	    (r->keep_state == PF_STATE_MODULATE ||
4159	    r->keep_state == PF_STATE_SYNPROXY)) {
4160		yyerror("sloppy state matching cannot be used with "
4161		    "synproxy state or modulate state");
4162		problems++;
4163	}
4164	if ((r->nat.addr.type != PF_ADDR_NONE ||
4165	    r->rdr.addr.type != PF_ADDR_NONE) &&
4166	    r->action != PF_MATCH && !r->keep_state) {
4167		yyerror("nat-to and rdr-to require keep state");
4168		problems++;
4169	}
4170	if (r->direction == PF_INOUT && (r->nat.addr.type != PF_ADDR_NONE ||
4171	    r->rdr.addr.type != PF_ADDR_NONE)) {
4172		yyerror("nat-to and rdr-to require a direction");
4173		problems++;
4174	}
4175	if (r->af == AF_INET6 && (r->scrub_flags &
4176	    (PFSTATE_NODF|PFSTATE_RANDOMID|PFSTATE_SETTOS))) {
4177		yyerror("address family inet6 does not support scrub options "
4178		    "no-df, random-id, set-tos");
4179		problems++;
4180	}
4181
4182	/* match rules rules */
4183	if (r->action == PF_MATCH) {
4184		if (r->divert.port) {
4185			yyerror("divert is not supported on match rules");
4186			problems++;
4187		}
4188		if (r->divert_packet.port) {
4189			yyerror("divert is not supported on match rules");
4190			problems++;
4191		}
4192		if (r->rt) {
4193			yyerror("route-to, reply-to and dup-to "
4194			   "must not be used on match rules");
4195			problems++;
4196		}
4197		if (r->nat.addr.type != PF_ADDR_NONE && r->naf != r->af) {
4198			yyerror("af-to is not supported on match rules");
4199			problems++;
4200		}
4201	}
4202	return (-problems);
4203}
4204
4205int
4206process_tabledef(char *name, struct table_opts *opts)
4207{
4208	struct pfr_buffer	 ab;
4209	struct node_tinit	*ti;
4210
4211	bzero(&ab, sizeof(ab));
4212	ab.pfrb_type = PFRB_ADDRS;
4213	SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4214		if (ti->file)
4215			if (pfr_buf_load(&ab, ti->file, 0)) {
4216				if (errno)
4217					yyerror("cannot load \"%s\": %s",
4218					    ti->file, strerror(errno));
4219				else
4220					yyerror("file \"%s\" contains bad data",
4221					    ti->file);
4222				goto _error;
4223			}
4224		if (ti->host)
4225			if (append_addr_host(&ab, ti->host, 0, 0)) {
4226				yyerror("cannot create address buffer: %s",
4227				    strerror(errno));
4228				goto _error;
4229			}
4230	}
4231	if (pf->opts & PF_OPT_VERBOSE)
4232		print_tabledef(name, opts->flags, opts->init_addr,
4233		    &opts->init_nodes);
4234	if (!(pf->opts & PF_OPT_NOACTION) &&
4235	    pfctl_define_table(name, opts->flags, opts->init_addr,
4236	    pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4237		yyerror("cannot define table %s: %s", name,
4238		    pfr_strerror(errno));
4239		goto _error;
4240	}
4241	pf->tdirty = 1;
4242	pfr_buf_clear(&ab);
4243	return (0);
4244_error:
4245	pfr_buf_clear(&ab);
4246	return (-1);
4247}
4248
4249struct keywords {
4250	const char	*k_name;
4251	int		 k_val;
4252};
4253
4254/* macro gore, but you should've seen the prior indentation nightmare... */
4255
4256#define FREE_LIST(T,r) \
4257	do { \
4258		T *p, *node = r; \
4259		while (node != NULL) { \
4260			p = node; \
4261			node = node->next; \
4262			free(p); \
4263		} \
4264	} while (0)
4265
4266#define LOOP_THROUGH(T,n,r,C) \
4267	do { \
4268		T *n; \
4269		if (r == NULL) { \
4270			r = calloc(1, sizeof(T)); \
4271			if (r == NULL) \
4272				err(1, "LOOP: calloc"); \
4273			r->next = NULL; \
4274		} \
4275		n = r; \
4276		while (n != NULL) { \
4277			do { \
4278				C; \
4279			} while (0); \
4280			n = n->next; \
4281		} \
4282	} while (0)
4283
4284void
4285expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4286{
4287	char *tmp;
4288	char *p, *q;
4289
4290	if ((tmp = calloc(1, len)) == NULL)
4291		err(1, "expand_label_str: calloc");
4292	p = q = label;
4293	while ((q = strstr(p, srch)) != NULL) {
4294		*q = '\0';
4295		if ((strlcat(tmp, p, len) >= len) ||
4296		    (strlcat(tmp, repl, len) >= len))
4297			errx(1, "expand_label: label too long");
4298		q += strlen(srch);
4299		p = q;
4300	}
4301	if (strlcat(tmp, p, len) >= len)
4302		errx(1, "expand_label: label too long");
4303	strlcpy(label, tmp, len);	/* always fits */
4304	free(tmp);
4305}
4306
4307void
4308expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4309{
4310	if (strstr(label, name) != NULL) {
4311		if (!*ifname)
4312			expand_label_str(label, len, name, "any");
4313		else
4314			expand_label_str(label, len, name, ifname);
4315	}
4316}
4317
4318void
4319expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
4320    struct node_host *h)
4321{
4322	char tmp[64], tmp_not[66];
4323
4324	if (strstr(label, name) != NULL) {
4325		switch (h->addr.type) {
4326		case PF_ADDR_DYNIFTL:
4327			snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
4328			break;
4329		case PF_ADDR_TABLE:
4330			snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
4331			break;
4332		case PF_ADDR_NOROUTE:
4333			snprintf(tmp, sizeof(tmp), "no-route");
4334			break;
4335		case PF_ADDR_URPFFAILED:
4336			snprintf(tmp, sizeof(tmp), "urpf-failed");
4337			break;
4338		case PF_ADDR_ADDRMASK:
4339			if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
4340			    PF_AZERO(&h->addr.v.a.mask, af)))
4341				snprintf(tmp, sizeof(tmp), "any");
4342			else {
4343				char	a[48];
4344				int	bits;
4345
4346				if (inet_ntop(af, &h->addr.v.a.addr, a,
4347				    sizeof(a)) == NULL)
4348					snprintf(tmp, sizeof(tmp), "?");
4349				else {
4350					bits = unmask(&h->addr.v.a.mask, af);
4351					if ((af == AF_INET && bits < 32) ||
4352					    (af == AF_INET6 && bits < 128))
4353						snprintf(tmp, sizeof(tmp),
4354						    "%s/%d", a, bits);
4355					else
4356						snprintf(tmp, sizeof(tmp),
4357						    "%s", a);
4358				}
4359			}
4360			break;
4361		default:
4362			snprintf(tmp, sizeof(tmp), "?");
4363			break;
4364		}
4365
4366		if (h->not) {
4367			snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
4368			expand_label_str(label, len, name, tmp_not);
4369		} else
4370			expand_label_str(label, len, name, tmp);
4371	}
4372}
4373
4374void
4375expand_label_port(const char *name, char *label, size_t len,
4376    struct node_port *port)
4377{
4378	char	 a1[6], a2[6], op[13] = "";
4379
4380	if (strstr(label, name) != NULL) {
4381		snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
4382		snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
4383		if (!port->op)
4384			;
4385		else if (port->op == PF_OP_IRG)
4386			snprintf(op, sizeof(op), "%s><%s", a1, a2);
4387		else if (port->op == PF_OP_XRG)
4388			snprintf(op, sizeof(op), "%s<>%s", a1, a2);
4389		else if (port->op == PF_OP_EQ)
4390			snprintf(op, sizeof(op), "%s", a1);
4391		else if (port->op == PF_OP_NE)
4392			snprintf(op, sizeof(op), "!=%s", a1);
4393		else if (port->op == PF_OP_LT)
4394			snprintf(op, sizeof(op), "<%s", a1);
4395		else if (port->op == PF_OP_LE)
4396			snprintf(op, sizeof(op), "<=%s", a1);
4397		else if (port->op == PF_OP_GT)
4398			snprintf(op, sizeof(op), ">%s", a1);
4399		else if (port->op == PF_OP_GE)
4400			snprintf(op, sizeof(op), ">=%s", a1);
4401		expand_label_str(label, len, name, op);
4402	}
4403}
4404
4405void
4406expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
4407{
4408	struct protoent *pe;
4409	char n[4];
4410
4411	if (strstr(label, name) != NULL) {
4412		pe = getprotobynumber(proto);
4413		if (pe != NULL)
4414			expand_label_str(label, len, name, pe->p_name);
4415		else {
4416			snprintf(n, sizeof(n), "%u", proto);
4417			expand_label_str(label, len, name, n);
4418		}
4419	}
4420}
4421
4422void
4423expand_label_nr(const char *name, char *label, size_t len)
4424{
4425	char n[11];
4426
4427	if (strstr(label, name) != NULL) {
4428		snprintf(n, sizeof(n), "%u", pf->anchor->match);
4429		expand_label_str(label, len, name, n);
4430	}
4431}
4432
4433void
4434expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
4435    struct node_host *src_host, struct node_port *src_port,
4436    struct node_host *dst_host, struct node_port *dst_port,
4437    u_int8_t proto)
4438{
4439	expand_label_if("$if", label, len, ifname);
4440	expand_label_addr("$srcaddr", label, len, af, src_host);
4441	expand_label_addr("$dstaddr", label, len, af, dst_host);
4442	expand_label_port("$srcport", label, len, src_port);
4443	expand_label_port("$dstport", label, len, dst_port);
4444	expand_label_proto("$proto", label, len, proto);
4445	expand_label_nr("$nr", label, len);
4446}
4447
4448int
4449expand_altq(struct pf_altq *a, struct node_if *interfaces,
4450    struct node_queue *nqueues, struct node_queue_bw bwspec,
4451    struct node_queue_opt *opts)
4452{
4453	struct pf_altq		 pa, pb;
4454	char			 qname[PF_QNAME_SIZE];
4455	struct node_queue	*n;
4456	struct node_queue_bw	 bw;
4457	int			 errs = 0;
4458
4459	LOOP_THROUGH(struct node_if, interface, interfaces,
4460		memcpy(&pa, a, sizeof(struct pf_altq));
4461		if (strlcpy(pa.ifname, interface->ifname,
4462		    sizeof(pa.ifname)) >= sizeof(pa.ifname))
4463			errx(1, "expand_altq: strlcpy");
4464
4465		if (interface->not) {
4466			yyerror("altq on ! <interface> is not supported");
4467			errs++;
4468		} else if (interface->use_rdomain) {
4469			yyerror("altq on rdomain <num> is not supported");
4470			errs++;
4471		} else {
4472			if (eval_pfaltq(pf, &pa, &bwspec, opts))
4473				errs++;
4474			else
4475				if (pfctl_add_altq(pf, &pa))
4476					errs++;
4477
4478			if (pf->opts & PF_OPT_VERBOSE) {
4479				print_altq(&pf->paltq->altq, 0,
4480				    &bwspec, opts);
4481				if (nqueues && nqueues->tail) {
4482					printf("queue { ");
4483					LOOP_THROUGH(struct node_queue, queue,
4484					    nqueues,
4485						printf("%s ",
4486						    queue->queue);
4487					);
4488					printf("}");
4489				}
4490				printf("\n");
4491			}
4492
4493			if (pa.scheduler == ALTQT_CBQ ||
4494			    pa.scheduler == ALTQT_HFSC) {
4495				/* now create a root queue */
4496				memset(&pb, 0, sizeof(struct pf_altq));
4497				if (strlcpy(qname, "root_", sizeof(qname)) >=
4498				    sizeof(qname))
4499					errx(1, "expand_altq: strlcpy");
4500				if (strlcat(qname, interface->ifname,
4501				    sizeof(qname)) >= sizeof(qname))
4502					errx(1, "expand_altq: strlcat");
4503				if (strlcpy(pb.qname, qname,
4504				    sizeof(pb.qname)) >= sizeof(pb.qname))
4505					errx(1, "expand_altq: strlcpy");
4506				if (strlcpy(pb.ifname, interface->ifname,
4507				    sizeof(pb.ifname)) >= sizeof(pb.ifname))
4508					errx(1, "expand_altq: strlcpy");
4509				pb.qlimit = pa.qlimit;
4510				pb.scheduler = pa.scheduler;
4511				bw.bw_absolute = pa.ifbandwidth;
4512				bw.bw_percent = 0;
4513				if (eval_pfqueue(pf, &pb, &bw, opts))
4514					errs++;
4515				else
4516					if (pfctl_add_altq(pf, &pb))
4517						errs++;
4518			}
4519
4520			LOOP_THROUGH(struct node_queue, queue, nqueues,
4521				n = calloc(1, sizeof(struct node_queue));
4522				if (n == NULL)
4523					err(1, "expand_altq: calloc");
4524				if (pa.scheduler == ALTQT_CBQ ||
4525				    pa.scheduler == ALTQT_HFSC)
4526					if (strlcpy(n->parent, qname,
4527					    sizeof(n->parent)) >=
4528					    sizeof(n->parent))
4529						errx(1, "expand_altq: strlcpy");
4530				if (strlcpy(n->queue, queue->queue,
4531				    sizeof(n->queue)) >= sizeof(n->queue))
4532					errx(1, "expand_altq: strlcpy");
4533				if (strlcpy(n->ifname, interface->ifname,
4534				    sizeof(n->ifname)) >= sizeof(n->ifname))
4535					errx(1, "expand_altq: strlcpy");
4536				n->scheduler = pa.scheduler;
4537				n->next = NULL;
4538				n->tail = n;
4539				if (queues == NULL)
4540					queues = n;
4541				else {
4542					queues->tail->next = n;
4543					queues->tail = n;
4544				}
4545			);
4546		}
4547	);
4548	FREE_LIST(struct node_if, interfaces);
4549	FREE_LIST(struct node_queue, nqueues);
4550
4551	return (errs);
4552}
4553
4554int
4555expand_queue(struct pf_altq *a, struct node_if *interfaces,
4556    struct node_queue *nqueues, struct node_queue_bw bwspec,
4557    struct node_queue_opt *opts)
4558{
4559	struct node_queue	*n, *nq;
4560	struct pf_altq		 pa;
4561	u_int8_t		 found = 0;
4562	u_int8_t		 errs = 0;
4563
4564	if (queues == NULL) {
4565		yyerror("queue %s has no parent", a->qname);
4566		FREE_LIST(struct node_queue, nqueues);
4567		return (1);
4568	}
4569
4570	LOOP_THROUGH(struct node_if, interface, interfaces,
4571		LOOP_THROUGH(struct node_queue, tqueue, queues,
4572			if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
4573			    (interface->ifname[0] == 0 ||
4574			    (!interface->not && !strncmp(interface->ifname,
4575			    tqueue->ifname, IFNAMSIZ)) ||
4576			    (interface->not && strncmp(interface->ifname,
4577			    tqueue->ifname, IFNAMSIZ)))) {
4578				/* found ourself in queues */
4579				found++;
4580
4581				memcpy(&pa, a, sizeof(struct pf_altq));
4582
4583				if (pa.scheduler != ALTQT_NONE &&
4584				    pa.scheduler != tqueue->scheduler) {
4585					yyerror("exactly one scheduler type "
4586					    "per interface allowed");
4587					return (1);
4588				}
4589				pa.scheduler = tqueue->scheduler;
4590
4591				/* scheduler dependent error checking */
4592				switch (pa.scheduler) {
4593				case ALTQT_PRIQ:
4594					if (nqueues != NULL) {
4595						yyerror("priq queues cannot "
4596						    "have child queues");
4597						return (1);
4598					}
4599					if (bwspec.bw_absolute > 0 ||
4600					    bwspec.bw_percent < 100) {
4601						yyerror("priq doesn't take "
4602						    "bandwidth");
4603						return (1);
4604					}
4605					break;
4606				default:
4607					break;
4608				}
4609
4610				if (strlcpy(pa.ifname, tqueue->ifname,
4611				    sizeof(pa.ifname)) >= sizeof(pa.ifname))
4612					errx(1, "expand_queue: strlcpy");
4613				if (strlcpy(pa.parent, tqueue->parent,
4614				    sizeof(pa.parent)) >= sizeof(pa.parent))
4615					errx(1, "expand_queue: strlcpy");
4616
4617				if (eval_pfqueue(pf, &pa, &bwspec, opts))
4618					errs++;
4619				else
4620					if (pfctl_add_altq(pf, &pa))
4621						errs++;
4622
4623				for (nq = nqueues; nq != NULL; nq = nq->next) {
4624					if (!strcmp(a->qname, nq->queue)) {
4625						yyerror("queue cannot have "
4626						    "itself as child");
4627						errs++;
4628						continue;
4629					}
4630					n = calloc(1,
4631					    sizeof(struct node_queue));
4632					if (n == NULL)
4633						err(1, "expand_queue: calloc");
4634					if (strlcpy(n->parent, a->qname,
4635					    sizeof(n->parent)) >=
4636					    sizeof(n->parent))
4637						errx(1, "expand_queue strlcpy");
4638					if (strlcpy(n->queue, nq->queue,
4639					    sizeof(n->queue)) >=
4640					    sizeof(n->queue))
4641						errx(1, "expand_queue strlcpy");
4642					if (strlcpy(n->ifname, tqueue->ifname,
4643					    sizeof(n->ifname)) >=
4644					    sizeof(n->ifname))
4645						errx(1, "expand_queue strlcpy");
4646					n->scheduler = tqueue->scheduler;
4647					n->next = NULL;
4648					n->tail = n;
4649					if (queues == NULL)
4650						queues = n;
4651					else {
4652						queues->tail->next = n;
4653						queues->tail = n;
4654					}
4655				}
4656				if ((pf->opts & PF_OPT_VERBOSE) && (
4657				    (found == 1 && interface->ifname[0] == 0) ||
4658				    (found > 0 && interface->ifname[0] != 0))) {
4659					print_queue(&pf->paltq->altq, 0,
4660					    &bwspec, interface->ifname[0] != 0,
4661					    opts);
4662					if (nqueues && nqueues->tail) {
4663						printf("{ ");
4664						LOOP_THROUGH(struct node_queue,
4665						    queue, nqueues,
4666							printf("%s ",
4667							    queue->queue);
4668						);
4669						printf("}");
4670					}
4671					printf("\n");
4672				}
4673			}
4674		);
4675	);
4676
4677	FREE_LIST(struct node_queue, nqueues);
4678	FREE_LIST(struct node_if, interfaces);
4679
4680	if (!found) {
4681		yyerror("queue %s has no parent", a->qname);
4682		errs++;
4683	}
4684
4685	if (errs)
4686		return (1);
4687	else
4688		return (0);
4689}
4690
4691int
4692collapse_redirspec(struct pf_pool *rpool, struct pf_rule *r,
4693    struct redirspec *rs, u_int8_t allow_if)
4694{
4695	struct pf_opt_tbl *tbl = NULL;
4696	struct node_host *h;
4697	struct pf_rule_addr ra;
4698	int	i = 0;
4699
4700	if (rs && rs->af)
4701		r->naf = rs->af;
4702
4703	if (!rs || !rs->rdr || rs->rdr->host == NULL) {
4704		rpool->addr.type = PF_ADDR_NONE;
4705		return (0);
4706	}
4707
4708	/* count matching addresses */
4709	for (h = rs->rdr->host; h != NULL; h = h->next) {
4710		if (!r->af || !h->af || rs->af || h->af == r->af) {
4711			i++;
4712			if (h->af && !r->af)
4713				r->af = h->af;
4714		}
4715	}
4716
4717	if (i == 0) {		/* no pool address */
4718		yyerror("af mismatch in %s spec",
4719		    allow_if ? "routing" : "translation");
4720		return (1);
4721	} else if (i == 1) {	/* only one address */
4722		for (h = rs->rdr->host; h != NULL; h = h->next)
4723			if (!h->af || !r->af || rs->af || r->af == h->af)
4724				break;
4725		rpool->addr = h->addr;
4726		if (!allow_if && h->ifname) {
4727			yyerror("@if not permitted for translation");
4728			return (1);
4729		}
4730		if (h->ifname && strlcpy(rpool->ifname, h->ifname,
4731		    sizeof(rpool->ifname)) >= sizeof(rpool->ifname))
4732			errx(1, "collapse_redirspec: strlcpy");
4733
4734		return (0);
4735	} else {		/* more than one address */
4736		if (rs->pool_opts.type &&
4737		    (rs->pool_opts.type != PF_POOL_ROUNDROBIN) &&
4738		    (rs->pool_opts.type != PF_POOL_LEASTSTATES)) {
4739			yyerror("only round-robin or "
4740			    "least-states valid for multiple "
4741			    "translation or routing addresses");
4742			return (1);
4743		}
4744		for (h = rs->rdr->host; h != NULL; h = h->next) {
4745			if (!rs->af && r->af != h->af)
4746				continue;
4747			if (h->addr.type != PF_ADDR_ADDRMASK &&
4748			    h->addr.type != PF_ADDR_NONE) {
4749				yyerror("multiple tables or dynamic interfaces "
4750				    "not supported for translation or routing");
4751				return (1);
4752			}
4753			if (!allow_if && h->ifname) {
4754				yyerror("@if not permitted for translation");
4755				return (1);
4756			}
4757			memset(&ra, 0, sizeof(ra));
4758			ra.addr = h->addr;
4759			ra.weight = h->weight;
4760			if (add_opt_table(pf, &tbl,
4761			    h->af, &ra, h->ifname))
4762				return (1);
4763		}
4764	}
4765	if (tbl) {
4766		if ((pf->opts & PF_OPT_NOACTION) == 0 &&
4767		     pf_opt_create_table(pf, tbl))
4768				return (1);
4769
4770		pf->tdirty = 1;
4771
4772		if (pf->opts & PF_OPT_VERBOSE)
4773			print_tabledef(tbl->pt_name,
4774			    PFR_TFLAG_CONST | tbl->pt_flags,
4775			    1, &tbl->pt_nodes);
4776
4777		memset(&rpool->addr, 0, sizeof(rpool->addr));
4778		rpool->addr.type = PF_ADDR_TABLE;
4779		strlcpy(rpool->addr.v.tblname, tbl->pt_name,
4780		    sizeof(rpool->addr.v.tblname));
4781
4782		pfr_buf_clear(tbl->pt_buf);
4783		free(tbl->pt_buf);
4784		tbl->pt_buf = NULL;
4785		free(tbl);
4786	}
4787	return (0);
4788}
4789
4790
4791int
4792apply_redirspec(struct pf_pool *rpool, struct pf_rule *r, struct redirspec *rs,
4793    int isrdr, struct node_port *np)
4794{
4795	if (!rs || !rs->rdr)
4796		return (0);
4797
4798	rpool->proxy_port[0] = ntohs(rs->rdr->rport.a);
4799
4800	if (isrdr) {
4801		if (!rs->rdr->rport.b && rs->rdr->rport.t && np->port != NULL) {
4802			rpool->proxy_port[1] = ntohs(rs->rdr->rport.a) +
4803			    (ntohs(np->port[1]) - ntohs(np->port[0]));
4804		} else
4805			rpool->proxy_port[1] = ntohs(rs->rdr->rport.b);
4806	} else {
4807		rpool->proxy_port[1] = ntohs(rs->rdr->rport.b);
4808		if (!rpool->proxy_port[0] && !rpool->proxy_port[1]) {
4809			rpool->proxy_port[0] = PF_NAT_PROXY_PORT_LOW;
4810			rpool->proxy_port[1] = PF_NAT_PROXY_PORT_HIGH;
4811		} else if (!rpool->proxy_port[1])
4812			rpool->proxy_port[1] = rpool->proxy_port[0];
4813	}
4814
4815	rpool->opts = rs->pool_opts.type;
4816	if (rpool->addr.type == PF_ADDR_TABLE ||
4817	    DYNIF_MULTIADDR(rpool->addr))
4818		rpool->opts |= PF_POOL_ROUNDROBIN;
4819
4820	if (rs->pool_opts.key != NULL)
4821		memcpy(&rpool->key, rs->pool_opts.key,
4822		    sizeof(struct pf_poolhashkey));
4823
4824	if (rs->pool_opts.opts)
4825		rpool->opts |= rs->pool_opts.opts;
4826
4827	if (rs->pool_opts.staticport) {
4828		if (isrdr) {
4829			yyerror("the 'static-port' option is only valid with "
4830			    "nat rules");
4831			return (1);
4832		}
4833		if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW &&
4834		    rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) {
4835			yyerror("the 'static-port' option can't be used when "
4836			    "specifying a port range");
4837			return (1);
4838		}
4839		rpool->proxy_port[0] = 0;
4840		rpool->proxy_port[1] = 0;
4841	}
4842
4843	return (0);
4844}
4845
4846
4847void
4848expand_rule(struct pf_rule *r, int keeprule, struct node_if *interfaces,
4849    struct redirspec *nat, struct redirspec *rdr, struct redirspec *rroute,
4850    struct node_proto *protos, struct node_os *src_oses,
4851    struct node_host *src_hosts, struct node_port *src_ports,
4852    struct node_host *dst_hosts, struct node_port *dst_ports,
4853    struct node_uid *uids, struct node_gid *gids, struct node_if *rcv,
4854    struct node_icmp *icmp_types, const char *anchor_call)
4855{
4856	sa_family_t		 af = r->af;
4857	int			 added = 0, error = 0;
4858	char			 ifname[IF_NAMESIZE];
4859	char			 label[PF_RULE_LABEL_SIZE];
4860	char			 tagname[PF_TAG_NAME_SIZE];
4861	char			 match_tagname[PF_TAG_NAME_SIZE];
4862	u_int8_t		 flags, flagset, keep_state;
4863	struct node_host	*srch, *dsth;
4864	struct redirspec	 binat;
4865	struct pf_rule		 rb;
4866	int			 dir = r->direction;
4867
4868	if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
4869		errx(1, "expand_rule: strlcpy");
4870	if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
4871		errx(1, "expand_rule: strlcpy");
4872	if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
4873	    sizeof(match_tagname))
4874		errx(1, "expand_rule: strlcpy");
4875	flags = r->flags;
4876	flagset = r->flagset;
4877	keep_state = r->keep_state;
4878
4879	r->src.addr.type = r->dst.addr.type = PF_ADDR_ADDRMASK;
4880
4881	LOOP_THROUGH(struct node_if, interface, interfaces,
4882	LOOP_THROUGH(struct node_proto, proto, protos,
4883	LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
4884	LOOP_THROUGH(struct node_host, src_host, src_hosts,
4885	LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
4886	LOOP_THROUGH(struct node_port, src_port, src_ports,
4887	LOOP_THROUGH(struct node_port, dst_port, dst_ports,
4888	LOOP_THROUGH(struct node_os, src_os, src_oses,
4889	LOOP_THROUGH(struct node_uid, uid, uids,
4890	LOOP_THROUGH(struct node_gid, gid, gids,
4891
4892		r->af = af;
4893
4894		error += collapse_redirspec(&r->rdr, r, rdr, 0);
4895		error += collapse_redirspec(&r->nat, r, nat, 0);
4896		error += collapse_redirspec(&r->route, r, rroute, 1);
4897
4898		/* disallow @if in from or to for the time being */
4899		if ((src_host->addr.type == PF_ADDR_ADDRMASK &&
4900		    src_host->ifname) ||
4901		    (dst_host->addr.type == PF_ADDR_ADDRMASK &&
4902		    dst_host->ifname)) {
4903			yyerror("@if syntax not permitted in from or to");
4904			error++;
4905		}
4906		/* for link-local IPv6 address, interface must match up */
4907		if ((r->af && src_host->af && r->af != src_host->af) ||
4908		    (r->af && dst_host->af && r->af != dst_host->af) ||
4909		    (src_host->af && dst_host->af &&
4910		    src_host->af != dst_host->af) ||
4911		    (src_host->ifindex && dst_host->ifindex &&
4912		    src_host->ifindex != dst_host->ifindex) ||
4913		    (src_host->ifindex && *interface->ifname &&
4914		    src_host->ifindex != if_nametoindex(interface->ifname)) ||
4915		    (dst_host->ifindex && *interface->ifname &&
4916		    dst_host->ifindex != if_nametoindex(interface->ifname)))
4917			continue;
4918		if (!r->af && src_host->af)
4919			r->af = src_host->af;
4920		else if (!r->af && dst_host->af)
4921			r->af = dst_host->af;
4922
4923		if (*interface->ifname)
4924			strlcpy(r->ifname, interface->ifname,
4925			    sizeof(r->ifname));
4926		else if (if_indextoname(src_host->ifindex, ifname))
4927			strlcpy(r->ifname, ifname, sizeof(r->ifname));
4928		else if (if_indextoname(dst_host->ifindex, ifname))
4929			strlcpy(r->ifname, ifname, sizeof(r->ifname));
4930		else
4931			memset(r->ifname, '\0', sizeof(r->ifname));
4932
4933		if (interface->use_rdomain)
4934			r->onrdomain = interface->rdomain;
4935		else
4936			r->onrdomain = -1;
4937		if (strlcpy(r->label, label, sizeof(r->label)) >=
4938		    sizeof(r->label))
4939			errx(1, "expand_rule: strlcpy");
4940		if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
4941		    sizeof(r->tagname))
4942			errx(1, "expand_rule: strlcpy");
4943		if (strlcpy(r->match_tagname, match_tagname,
4944		    sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
4945			errx(1, "expand_rule: strlcpy");
4946		expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
4947		    src_host, src_port, dst_host, dst_port, proto->proto);
4948		expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
4949		    src_host, src_port, dst_host, dst_port, proto->proto);
4950		expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
4951		    r->af, src_host, src_port, dst_host, dst_port,
4952		    proto->proto);
4953
4954		error += check_netmask(src_host, r->af);
4955		error += check_netmask(dst_host, r->af);
4956
4957		r->ifnot = interface->not;
4958		r->proto = proto->proto;
4959		r->src.addr = src_host->addr;
4960		r->src.neg = src_host->not;
4961		r->src.port[0] = src_port->port[0];
4962		r->src.port[1] = src_port->port[1];
4963		r->src.port_op = src_port->op;
4964		r->dst.addr = dst_host->addr;
4965		r->dst.neg = dst_host->not;
4966		r->dst.port[0] = dst_port->port[0];
4967		r->dst.port[1] = dst_port->port[1];
4968		r->dst.port_op = dst_port->op;
4969		r->uid.op = uid->op;
4970		r->uid.uid[0] = uid->uid[0];
4971		r->uid.uid[1] = uid->uid[1];
4972		r->gid.op = gid->op;
4973		r->gid.gid[0] = gid->gid[0];
4974		r->gid.gid[1] = gid->gid[1];
4975		if (rcv) {
4976			strlcpy(r->rcv_ifname, rcv->ifname,
4977			    sizeof(r->rcv_ifname));
4978		}
4979		r->type = icmp_type->type;
4980		r->code = icmp_type->code;
4981
4982		if ((keep_state == PF_STATE_MODULATE ||
4983		    keep_state == PF_STATE_SYNPROXY) &&
4984		    r->proto && r->proto != IPPROTO_TCP)
4985			r->keep_state = PF_STATE_NORMAL;
4986		else
4987			r->keep_state = keep_state;
4988
4989		if (r->proto && r->proto != IPPROTO_TCP) {
4990			r->flags = 0;
4991			r->flagset = 0;
4992		} else {
4993			r->flags = flags;
4994			r->flagset = flagset;
4995		}
4996		if (icmp_type->proto && r->proto != icmp_type->proto) {
4997			yyerror("icmp-type mismatch");
4998			error++;
4999		}
5000
5001		if (src_os && src_os->os) {
5002			r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5003			if ((pf->opts & PF_OPT_VERBOSE2) &&
5004			    r->os_fingerprint == PF_OSFP_NOMATCH)
5005				fprintf(stderr,
5006				    "warning: unknown '%s' OS fingerprint\n",
5007				    src_os->os);
5008		} else {
5009			r->os_fingerprint = PF_OSFP_ANY;
5010		}
5011
5012		if (nat && nat->rdr && nat->binat) {
5013			if (disallow_table(src_host, "invalid use of table "
5014			    "<%s> as the source address of a binat-to rule") ||
5015			    disallow_alias(src_host, "invalid use of interface "
5016			    "(%s) as the source address of a binat-to rule")) {
5017				error++;
5018			} else if ((r->src.addr.type != PF_ADDR_ADDRMASK &&
5019			    r->src.addr.type != PF_ADDR_DYNIFTL) ||
5020			    (r->nat.addr.type != PF_ADDR_ADDRMASK &&
5021			    r->nat.addr.type != PF_ADDR_DYNIFTL)) {
5022				yyerror("binat-to requires a specified "
5023				    "source and redirect address");
5024				error++;
5025			}
5026			if (DYNIF_MULTIADDR(r->src.addr) ||
5027			    DYNIF_MULTIADDR(r->nat.addr)) {
5028				yyerror ("dynamic interfaces must be used with "
5029				    ":0 in a binat-to rule");
5030				error++;
5031			}
5032			if (PF_AZERO(&r->src.addr.v.a.mask, af) ||
5033			    PF_AZERO(&r->nat.addr.v.a.mask, af)) {
5034				yyerror ("source and redir addresess must have "
5035				    "a matching network mask in binat-rule");
5036				error++;
5037			}
5038			if (r->nat.addr.type == PF_ADDR_TABLE) {
5039				yyerror ("tables cannot be used as the redirect "
5040				    "address of a binat-to rule");
5041				error++;
5042			}
5043			if (r->direction != PF_INOUT) {
5044				yyerror("binat-to cannot be specified "
5045				    "with a direction");
5046				error++;
5047			}
5048
5049			/* first specify outbound NAT rule */
5050			r->direction = PF_OUT;
5051		}
5052
5053		error += apply_redirspec(&r->nat, r, nat, 0, dst_port);
5054		error += apply_redirspec(&r->rdr, r, rdr, 1, dst_port);
5055		error += apply_redirspec(&r->route, r, rroute, 2, dst_port);
5056
5057		if (rule_consistent(r, anchor_call[0]) < 0 || error)
5058			yyerror("skipping rule due to errors");
5059		else {
5060			r->nr = pf->astack[pf->asd]->match++;
5061			pfctl_add_rule(pf, r, anchor_call);
5062			added++;
5063		}
5064		r->direction = dir;
5065
5066		/* Generate binat's matching inbound rule */
5067		if (!error && nat && nat->rdr && nat->binat) {
5068			bcopy(r, &rb, sizeof(rb));
5069
5070			/* now specify inbound rdr rule */
5071			rb.direction = PF_IN;
5072
5073			if ((srch = calloc(1, sizeof(*srch))) == NULL)
5074				err(1, "expand_rule: calloc");
5075			bcopy(src_host, srch, sizeof(*srch));
5076			srch->ifname = NULL;
5077			srch->next = NULL;
5078			srch->tail = NULL;
5079
5080			if ((dsth = calloc(1, sizeof(*dsth))) == NULL)
5081				err(1, "expand_rule: calloc");
5082			bcopy(&rb.nat.addr, &dsth->addr, sizeof(dsth->addr));
5083			dsth->ifname = NULL;
5084			dsth->next = NULL;
5085			dsth->tail = NULL;
5086
5087			if ((binat.rdr =
5088			    calloc(1, sizeof(*binat.rdr))) == NULL)
5089				err(1, "expand_rule: calloc");
5090			bcopy(nat->rdr, binat.rdr, sizeof(*binat.rdr));
5091			bcopy(&nat->pool_opts, &binat.pool_opts,
5092			    sizeof(binat.pool_opts));
5093			binat.pool_opts.staticport = 0;
5094			binat.rdr->host = srch;
5095
5096			expand_rule(&rb, 1, interface, NULL, &binat, NULL,
5097			    proto,
5098			    src_os, dst_host, dst_port, dsth, src_port,
5099			    uid, gid, rcv, icmp_type, anchor_call);
5100		}
5101
5102	))))))))));
5103
5104	if (!keeprule) {
5105		FREE_LIST(struct node_if, interfaces);
5106		FREE_LIST(struct node_proto, protos);
5107		FREE_LIST(struct node_host, src_hosts);
5108		FREE_LIST(struct node_port, src_ports);
5109		FREE_LIST(struct node_os, src_oses);
5110		FREE_LIST(struct node_host, dst_hosts);
5111		FREE_LIST(struct node_port, dst_ports);
5112		FREE_LIST(struct node_uid, uids);
5113		FREE_LIST(struct node_gid, gids);
5114		FREE_LIST(struct node_icmp, icmp_types);
5115		if (nat && nat->rdr)
5116			FREE_LIST(struct node_host, nat->rdr->host);
5117		if (rdr && rdr->rdr)
5118			FREE_LIST(struct node_host, rdr->rdr->host);
5119
5120	}
5121
5122	if (!added)
5123		yyerror("rule expands to no valid combination");
5124}
5125
5126int
5127expand_skip_interface(struct node_if *interfaces)
5128{
5129	int	errs = 0;
5130
5131	if (!interfaces || (!interfaces->next && !interfaces->not &&
5132	    !strcmp(interfaces->ifname, "none"))) {
5133		if (pf->opts & PF_OPT_VERBOSE)
5134			printf("set skip on none\n");
5135		errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
5136		return (errs);
5137	}
5138
5139	if (pf->opts & PF_OPT_VERBOSE)
5140		printf("set skip on {");
5141	LOOP_THROUGH(struct node_if, interface, interfaces,
5142		if (pf->opts & PF_OPT_VERBOSE)
5143			printf(" %s", interface->ifname);
5144		if (interface->not) {
5145			yyerror("skip on ! <interface> is not supported");
5146			errs++;
5147		} else if (interface->use_rdomain) {
5148			yyerror("skip on rdomain <num> is not supported");
5149			errs++;
5150		} else
5151			errs += pfctl_set_interface_flags(pf,
5152			    interface->ifname, PFI_IFLAG_SKIP, 1);
5153	);
5154	if (pf->opts & PF_OPT_VERBOSE)
5155		printf(" }\n");
5156
5157	FREE_LIST(struct node_if, interfaces);
5158
5159	if (errs)
5160		return (1);
5161	else
5162		return (0);
5163}
5164
5165void
5166freehostlist(struct node_host *h)
5167{
5168	struct node_host *n;
5169
5170	for (n = h; n != NULL; n = n->next)
5171		if (n->ifname)
5172			free(n->ifname);
5173	FREE_LIST(struct node_host, h);
5174}
5175
5176#undef FREE_LIST
5177#undef LOOP_THROUGH
5178
5179int
5180kw_cmp(const void *k, const void *e)
5181{
5182	return (strcmp(k, ((const struct keywords *)e)->k_name));
5183}
5184
5185int
5186lookup(char *s)
5187{
5188	/* this has to be sorted always */
5189	static const struct keywords keywords[] = {
5190		{ "af-to",		AFTO},
5191		{ "all",		ALL},
5192		{ "allow-opts",		ALLOWOPTS},
5193		{ "altq",		ALTQ},
5194		{ "anchor",		ANCHOR},
5195		{ "antispoof",		ANTISPOOF},
5196		{ "any",		ANY},
5197		{ "bandwidth",		BANDWIDTH},
5198		{ "binat-to",		BINATTO},
5199		{ "bitmask",		BITMASK},
5200		{ "block",		BLOCK},
5201		{ "block-policy",	BLOCKPOLICY},
5202		{ "cbq",		CBQ},
5203		{ "code",		CODE},
5204		{ "debug",		DEBUG},
5205		{ "divert-packet",	DIVERTPACKET},
5206		{ "divert-reply",	DIVERTREPLY},
5207		{ "divert-to",		DIVERTTO},
5208		{ "drop",		DROP},
5209		{ "dup-to",		DUPTO},
5210		{ "file",		FILENAME},
5211		{ "fingerprints",	FINGERPRINTS},
5212		{ "flags",		FLAGS},
5213		{ "floating",		FLOATING},
5214		{ "flush",		FLUSH},
5215		{ "for",		FOR},
5216		{ "fragment",		FRAGMENT},
5217		{ "from",		FROM},
5218		{ "global",		GLOBAL},
5219		{ "group",		GROUP},
5220		{ "hfsc",		HFSC},
5221		{ "hostid",		HOSTID},
5222		{ "icmp-type",		ICMPTYPE},
5223		{ "icmp6-type",		ICMP6TYPE},
5224		{ "if-bound",		IFBOUND},
5225		{ "in",			IN},
5226		{ "include",		INCLUDE},
5227		{ "inet",		INET},
5228		{ "inet6",		INET6},
5229		{ "keep",		KEEP},
5230		{ "label",		LABEL},
5231		{ "least-states",	LEASTSTATES},
5232		{ "limit",		LIMIT},
5233		{ "linkshare",		LINKSHARE},
5234		{ "load",		LOAD},
5235		{ "log",		LOG},
5236		{ "loginterface",	LOGINTERFACE},
5237		{ "match",		MATCH},
5238		{ "matches",		MATCHES},
5239		{ "max",		MAXIMUM},
5240		{ "max-mss",		MAXMSS},
5241		{ "max-src-conn",	MAXSRCCONN},
5242		{ "max-src-conn-rate",	MAXSRCCONNRATE},
5243		{ "max-src-nodes",	MAXSRCNODES},
5244		{ "max-src-states",	MAXSRCSTATES},
5245		{ "min-ttl",		MINTTL},
5246		{ "modulate",		MODULATE},
5247		{ "nat-to",		NATTO},
5248		{ "no",			NO},
5249		{ "no-df",		NODF},
5250		{ "no-route",		NOROUTE},
5251		{ "no-sync",		NOSYNC},
5252		{ "on",			ON},
5253		{ "once",		ONCE},
5254		{ "optimization",	OPTIMIZATION},
5255		{ "os",			OS},
5256		{ "out",		OUT},
5257		{ "overload",		OVERLOAD},
5258		{ "pass",		PASS},
5259		{ "pflow",		PFLOW},
5260		{ "port",		PORT},
5261		{ "prio",		PRIO},
5262		{ "priority",		PRIORITY},
5263		{ "priq",		PRIQ},
5264		{ "probability",	PROBABILITY},
5265		{ "proto",		PROTO},
5266		{ "qlimit",		QLIMIT},
5267		{ "queue",		QUEUE},
5268		{ "quick",		QUICK},
5269		{ "random",		RANDOM},
5270		{ "random-id",		RANDOMID},
5271		{ "rdomain",		RDOMAIN},
5272		{ "rdr-to",		RDRTO},
5273		{ "realtime",		REALTIME},
5274		{ "reassemble",		REASSEMBLE},
5275		{ "received-on",	RECEIVEDON},
5276		{ "reply-to",		REPLYTO},
5277		{ "return",		RETURN},
5278		{ "return-icmp",	RETURNICMP},
5279		{ "return-icmp6",	RETURNICMP6},
5280		{ "return-rst",		RETURNRST},
5281		{ "round-robin",	ROUNDROBIN},
5282		{ "route",		ROUTE},
5283		{ "route-to",		ROUTETO},
5284		{ "rtable",		RTABLE},
5285		{ "rule",		RULE},
5286		{ "ruleset-optimization",	RULESET_OPTIMIZATION},
5287		{ "scrub",		SCRUB},
5288		{ "set",		SET},
5289		{ "set-tos",		SETTOS},
5290		{ "skip",		SKIP},
5291		{ "sloppy",		SLOPPY},
5292		{ "source-hash",	SOURCEHASH},
5293		{ "source-track",	SOURCETRACK},
5294		{ "state",		STATE},
5295		{ "state-defaults",	STATEDEFAULTS},
5296		{ "state-policy",	STATEPOLICY},
5297		{ "static-port",	STATICPORT},
5298		{ "sticky-address",	STICKYADDRESS},
5299		{ "synproxy",		SYNPROXY},
5300		{ "table",		TABLE},
5301		{ "tag",		TAG},
5302		{ "tagged",		TAGGED},
5303		{ "tbrsize",		TBRSIZE},
5304		{ "timeout",		TIMEOUT},
5305		{ "to",			TO},
5306		{ "tos",		TOS},
5307		{ "ttl",		TTL},
5308		{ "upperlimit",		UPPERLIMIT},
5309		{ "urpf-failed",	URPFFAILED},
5310		{ "user",		USER},
5311		{ "weight",		WEIGHT},
5312	};
5313	const struct keywords	*p;
5314
5315	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5316	    sizeof(keywords[0]), kw_cmp);
5317
5318	if (p) {
5319		if (debug > 1)
5320			fprintf(stderr, "%s: %d\n", s, p->k_val);
5321		return (p->k_val);
5322	} else {
5323		if (debug > 1)
5324			fprintf(stderr, "string: %s\n", s);
5325		return (STRING);
5326	}
5327}
5328
5329#define MAXPUSHBACK	128
5330
5331char	*parsebuf;
5332int	 parseindex;
5333char	 pushback_buffer[MAXPUSHBACK];
5334int	 pushback_index = 0;
5335
5336int
5337lgetc(int quotec)
5338{
5339	int		c, next;
5340
5341	if (parsebuf) {
5342		/* Read character from the parsebuffer instead of input. */
5343		if (parseindex >= 0) {
5344			c = parsebuf[parseindex++];
5345			if (c != '\0')
5346				return (c);
5347			parsebuf = NULL;
5348		} else
5349			parseindex++;
5350	}
5351
5352	if (pushback_index)
5353		return (pushback_buffer[--pushback_index]);
5354
5355	if (quotec) {
5356		if ((c = getc(file->stream)) == EOF) {
5357			yyerror("reached end of file while parsing quoted string");
5358			if (popfile() == EOF)
5359				return (EOF);
5360			return (quotec);
5361		}
5362		return (c);
5363	}
5364
5365	while ((c = getc(file->stream)) == '\\') {
5366		next = getc(file->stream);
5367		if (next != '\n') {
5368			c = next;
5369			break;
5370		}
5371		yylval.lineno = file->lineno;
5372		file->lineno++;
5373	}
5374
5375	while (c == EOF) {
5376		if (popfile() == EOF)
5377			return (EOF);
5378		c = getc(file->stream);
5379	}
5380	return (c);
5381}
5382
5383int
5384lungetc(int c)
5385{
5386	if (c == EOF)
5387		return (EOF);
5388	if (parsebuf) {
5389		parseindex--;
5390		if (parseindex >= 0)
5391			return (c);
5392	}
5393	if (pushback_index < MAXPUSHBACK-1)
5394		return (pushback_buffer[pushback_index++] = c);
5395	else
5396		return (EOF);
5397}
5398
5399int
5400findeol(void)
5401{
5402	int	c;
5403
5404	parsebuf = NULL;
5405
5406	/* skip to either EOF or the first real EOL */
5407	while (1) {
5408		if (pushback_index)
5409			c = pushback_buffer[--pushback_index];
5410		else
5411			c = lgetc(0);
5412		if (c == '\n') {
5413			file->lineno++;
5414			break;
5415		}
5416		if (c == EOF)
5417			break;
5418	}
5419	return (ERROR);
5420}
5421
5422int
5423yylex(void)
5424{
5425	char	 buf[8096];
5426	char	*p, *val;
5427	int	 quotec, next, c;
5428	int	 token;
5429
5430top:
5431	p = buf;
5432	while ((c = lgetc(0)) == ' ' || c == '\t')
5433		; /* nothing */
5434
5435	yylval.lineno = file->lineno;
5436	if (c == '#')
5437		while ((c = lgetc(0)) != '\n' && c != EOF)
5438			; /* nothing */
5439	if (c == '$' && parsebuf == NULL) {
5440		while (1) {
5441			if ((c = lgetc(0)) == EOF)
5442				return (0);
5443
5444			if (p + 1 >= buf + sizeof(buf) - 1) {
5445				yyerror("string too long");
5446				return (findeol());
5447			}
5448			if (isalnum(c) || c == '_') {
5449				*p++ = (char)c;
5450				continue;
5451			}
5452			*p = '\0';
5453			lungetc(c);
5454			break;
5455		}
5456		val = symget(buf);
5457		if (val == NULL) {
5458			yyerror("macro '%s' not defined", buf);
5459			return (findeol());
5460		}
5461		parsebuf = val;
5462		parseindex = 0;
5463		goto top;
5464	}
5465
5466	switch (c) {
5467	case '\'':
5468	case '"':
5469		quotec = c;
5470		while (1) {
5471			if ((c = lgetc(quotec)) == EOF)
5472				return (0);
5473			if (c == '\n') {
5474				file->lineno++;
5475				continue;
5476			} else if (c == '\\') {
5477				if ((next = lgetc(quotec)) == EOF)
5478					return (0);
5479				if (next == quotec || c == ' ' || c == '\t')
5480					c = next;
5481				else if (next == '\n') {
5482					file->lineno++;
5483					continue;
5484				} else
5485					lungetc(next);
5486			} else if (c == quotec) {
5487				*p = '\0';
5488				break;
5489			}
5490			if (p + 1 >= buf + sizeof(buf) - 1) {
5491				yyerror("string too long");
5492				return (findeol());
5493			}
5494			*p++ = (char)c;
5495		}
5496		yylval.v.string = strdup(buf);
5497		if (yylval.v.string == NULL)
5498			err(1, "yylex: strdup");
5499		return (STRING);
5500	case '!':
5501		next = lgetc(0);
5502		if (next == '=')
5503			return (NE);
5504		lungetc(next);
5505		break;
5506	case '<':
5507		next = lgetc(0);
5508		if (next == '>') {
5509			yylval.v.i = PF_OP_XRG;
5510			return (PORTBINARY);
5511		} else if (next == '=')
5512			return (LE);
5513		lungetc(next);
5514		break;
5515	case '>':
5516		next = lgetc(0);
5517		if (next == '<') {
5518			yylval.v.i = PF_OP_IRG;
5519			return (PORTBINARY);
5520		} else if (next == '=')
5521			return (GE);
5522		lungetc(next);
5523		break;
5524	}
5525
5526#define allowed_to_end_number(x) \
5527	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5528
5529	if (c == '-' || isdigit(c)) {
5530		do {
5531			*p++ = c;
5532			if ((unsigned)(p-buf) >= sizeof(buf)) {
5533				yyerror("string too long");
5534				return (findeol());
5535			}
5536		} while ((c = lgetc(0)) != EOF && isdigit(c));
5537		lungetc(c);
5538		if (p == buf + 1 && buf[0] == '-')
5539			goto nodigits;
5540		if (c == EOF || allowed_to_end_number(c)) {
5541			const char *errstr = NULL;
5542
5543			*p = '\0';
5544			yylval.v.number = strtonum(buf, LLONG_MIN,
5545			    LLONG_MAX, &errstr);
5546			if (errstr) {
5547				yyerror("\"%s\" invalid number: %s",
5548				    buf, errstr);
5549				return (findeol());
5550			}
5551			return (NUMBER);
5552		} else {
5553nodigits:
5554			while (p > buf + 1)
5555				lungetc(*--p);
5556			c = *--p;
5557			if (c == '-')
5558				return (c);
5559		}
5560	}
5561
5562#define allowed_in_string(x) \
5563	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
5564	x != '{' && x != '}' && x != '<' && x != '>' && \
5565	x != '!' && x != '=' && x != '/' && x != '#' && \
5566	x != ','))
5567
5568	if (isalnum(c) || c == ':' || c == '_') {
5569		do {
5570			*p++ = c;
5571			if ((unsigned)(p-buf) >= sizeof(buf)) {
5572				yyerror("string too long");
5573				return (findeol());
5574			}
5575		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
5576		lungetc(c);
5577		*p = '\0';
5578		if ((token = lookup(buf)) == STRING)
5579			if ((yylval.v.string = strdup(buf)) == NULL)
5580				err(1, "yylex: strdup");
5581		return (token);
5582	}
5583	if (c == '\n') {
5584		yylval.lineno = file->lineno;
5585		file->lineno++;
5586	}
5587	if (c == EOF)
5588		return (0);
5589	return (c);
5590}
5591
5592int
5593check_file_secrecy(int fd, const char *fname)
5594{
5595	struct stat	st;
5596
5597	if (fstat(fd, &st)) {
5598		warn("cannot stat %s", fname);
5599		return (-1);
5600	}
5601	if (st.st_uid != 0 && st.st_uid != getuid()) {
5602		warnx("%s: owner not root or current user", fname);
5603		return (-1);
5604	}
5605	if (st.st_mode & (S_IRWXG | S_IRWXO)) {
5606		warnx("%s: group/world readable/writeable", fname);
5607		return (-1);
5608	}
5609	return (0);
5610}
5611
5612struct file *
5613pushfile(const char *name, int secret)
5614{
5615	struct file	*nfile;
5616
5617	if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
5618	    (nfile->name = strdup(name)) == NULL) {
5619		if (nfile)
5620			free(nfile);
5621		warn("malloc");
5622		return (NULL);
5623	}
5624	if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
5625		nfile->stream = stdin;
5626		free(nfile->name);
5627		if ((nfile->name = strdup("stdin")) == NULL) {
5628			warn("strdup");
5629			free(nfile);
5630			return (NULL);
5631		}
5632	} else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
5633		warn("%s", nfile->name);
5634		free(nfile->name);
5635		free(nfile);
5636		return (NULL);
5637	} else if (secret &&
5638	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
5639		fclose(nfile->stream);
5640		free(nfile->name);
5641		free(nfile);
5642		return (NULL);
5643	}
5644	nfile->lineno = 1;
5645	TAILQ_INSERT_TAIL(&files, nfile, entry);
5646	return (nfile);
5647}
5648
5649int
5650popfile(void)
5651{
5652	struct file	*prev;
5653
5654	if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
5655		prev->errors += file->errors;
5656		TAILQ_REMOVE(&files, file, entry);
5657		fclose(file->stream);
5658		free(file->name);
5659		free(file);
5660		file = prev;
5661		return (0);
5662	}
5663	return (EOF);
5664}
5665
5666int
5667parse_config(char *filename, struct pfctl *xpf)
5668{
5669	int		 errors = 0;
5670	struct sym	*sym;
5671
5672	pf = xpf;
5673	errors = 0;
5674	returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
5675	returnicmp6default =
5676	    (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
5677	blockpolicy = PFRULE_DROP;
5678
5679	if ((file = pushfile(filename, 0)) == NULL) {
5680		warn("cannot open the main config file!");
5681		return (-1);
5682	}
5683
5684	yyparse();
5685	errors = file->errors;
5686	popfile();
5687
5688	/* Free macros and check which have not been used. */
5689	while ((sym = TAILQ_FIRST(&symhead))) {
5690		if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
5691			fprintf(stderr, "warning: macro '%s' not "
5692			    "used\n", sym->nam);
5693		free(sym->nam);
5694		free(sym->val);
5695		TAILQ_REMOVE(&symhead, sym, entry);
5696		free(sym);
5697	}
5698
5699	return (errors ? -1 : 0);
5700}
5701
5702int
5703symset(const char *nam, const char *val, int persist)
5704{
5705	struct sym	*sym;
5706
5707	for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
5708	    sym = TAILQ_NEXT(sym, entry))
5709		;	/* nothing */
5710
5711	if (sym != NULL) {
5712		if (sym->persist == 1)
5713			return (0);
5714		else {
5715			free(sym->nam);
5716			free(sym->val);
5717			TAILQ_REMOVE(&symhead, sym, entry);
5718			free(sym);
5719		}
5720	}
5721	if ((sym = calloc(1, sizeof(*sym))) == NULL)
5722		return (-1);
5723
5724	sym->nam = strdup(nam);
5725	if (sym->nam == NULL) {
5726		free(sym);
5727		return (-1);
5728	}
5729	sym->val = strdup(val);
5730	if (sym->val == NULL) {
5731		free(sym->nam);
5732		free(sym);
5733		return (-1);
5734	}
5735	sym->used = 0;
5736	sym->persist = persist;
5737	TAILQ_INSERT_TAIL(&symhead, sym, entry);
5738	return (0);
5739}
5740
5741int
5742pfctl_cmdline_symset(char *s)
5743{
5744	char	*sym, *val;
5745	int	 ret;
5746
5747	if ((val = strrchr(s, '=')) == NULL)
5748		return (-1);
5749
5750	if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
5751		err(1, "pfctl_cmdline_symset: malloc");
5752
5753	strlcpy(sym, s, strlen(s) - strlen(val) + 1);
5754
5755	ret = symset(sym, val + 1, 1);
5756	free(sym);
5757
5758	return (ret);
5759}
5760
5761char *
5762symget(const char *nam)
5763{
5764	struct sym	*sym;
5765
5766	TAILQ_FOREACH(sym, &symhead, entry)
5767		if (strcmp(nam, sym->nam) == 0) {
5768			sym->used = 1;
5769			return (sym->val);
5770		}
5771	return (NULL);
5772}
5773
5774void
5775mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst)
5776{
5777	struct pf_rule *r;
5778
5779	while ((r = TAILQ_FIRST(src->rules.active.ptr)) != NULL) {
5780		TAILQ_REMOVE(src->rules.active.ptr, r, entries);
5781		TAILQ_INSERT_TAIL(dst->rules.active.ptr, r, entries);
5782		dst->anchor->match++;
5783	}
5784	src->anchor->match = 0;
5785	while ((r = TAILQ_FIRST(src->rules.inactive.ptr)) != NULL) {
5786		TAILQ_REMOVE(src->rules.inactive.ptr, r, entries);
5787		TAILQ_INSERT_TAIL(dst->rules.inactive.ptr, r, entries);
5788	}
5789}
5790
5791void
5792decide_address_family(struct node_host *n, sa_family_t *af)
5793{
5794	if (*af != 0 || n == NULL)
5795		return;
5796	*af = n->af;
5797	while ((n = n->next) != NULL) {
5798		if (n->af != *af) {
5799			*af = 0;
5800			return;
5801		}
5802	}
5803}
5804
5805int
5806invalid_redirect(struct node_host *nh, sa_family_t af)
5807{
5808	if (!af) {
5809		struct node_host *n;
5810
5811		/* tables and dyniftl are ok without an address family */
5812		for (n = nh; n != NULL; n = n->next) {
5813			if (n->addr.type != PF_ADDR_TABLE &&
5814			    n->addr.type != PF_ADDR_DYNIFTL) {
5815				yyerror("address family not given and "
5816				    "translation address expands to multiple "
5817				    "address families");
5818				return (1);
5819			}
5820		}
5821	}
5822	if (nh == NULL) {
5823		yyerror("no translation address with matching address family "
5824		    "found.");
5825		return (1);
5826	}
5827	return (0);
5828}
5829
5830int
5831atoul(char *s, u_long *ulvalp)
5832{
5833	u_long	 ulval;
5834	char	*ep;
5835
5836	errno = 0;
5837	ulval = strtoul(s, &ep, 0);
5838	if (s[0] == '\0' || *ep != '\0')
5839		return (-1);
5840	if (errno == ERANGE && ulval == ULONG_MAX)
5841		return (-1);
5842	*ulvalp = ulval;
5843	return (0);
5844}
5845
5846int
5847getservice(char *n)
5848{
5849	struct servent	*s;
5850	u_long		 ulval;
5851
5852	if (atoul(n, &ulval) == 0) {
5853		if (ulval > 65535) {
5854			yyerror("illegal port value %lu", ulval);
5855			return (-1);
5856		}
5857		return (htons(ulval));
5858	} else {
5859		s = getservbyname(n, "tcp");
5860		if (s == NULL)
5861			s = getservbyname(n, "udp");
5862		if (s == NULL) {
5863			yyerror("unknown port %s", n);
5864			return (-1);
5865		}
5866		return (s->s_port);
5867	}
5868}
5869
5870int
5871rule_label(struct pf_rule *r, char *s)
5872{
5873	if (s) {
5874		if (strlcpy(r->label, s, sizeof(r->label)) >=
5875		    sizeof(r->label)) {
5876			yyerror("rule label too long (max %d chars)",
5877			    sizeof(r->label)-1);
5878			return (-1);
5879		}
5880	}
5881	return (0);
5882}
5883
5884u_int16_t
5885parseicmpspec(char *w, sa_family_t af)
5886{
5887	const struct icmpcodeent	*p;
5888	u_long				 ulval;
5889	u_int8_t			 icmptype;
5890
5891	if (af == AF_INET)
5892		icmptype = returnicmpdefault >> 8;
5893	else
5894		icmptype = returnicmp6default >> 8;
5895
5896	if (atoul(w, &ulval) == -1) {
5897		if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
5898			yyerror("unknown icmp code %s", w);
5899			return (0);
5900		}
5901		ulval = p->code;
5902	}
5903	if (ulval > 255) {
5904		yyerror("invalid icmp code %lu", ulval);
5905		return (0);
5906	}
5907	return (icmptype << 8 | ulval);
5908}
5909
5910int
5911parseport(char *port, struct range *r, int extensions)
5912{
5913	char	*p = strchr(port, ':');
5914
5915	if (p == NULL) {
5916		if ((r->a = getservice(port)) == -1)
5917			return (-1);
5918		r->b = 0;
5919		r->t = PF_OP_NONE;
5920		return (0);
5921	}
5922	if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
5923		*p = 0;
5924		if ((r->a = getservice(port)) == -1)
5925			return (-1);
5926		r->b = 0;
5927		r->t = PF_OP_IRG;
5928		return (0);
5929	}
5930	if ((extensions & PPORT_RANGE)) {
5931		*p++ = 0;
5932		if ((r->a = getservice(port)) == -1 ||
5933		    (r->b = getservice(p)) == -1)
5934			return (-1);
5935		if (r->a == r->b) {
5936			r->b = 0;
5937			r->t = PF_OP_NONE;
5938		} else
5939			r->t = PF_OP_RRG;
5940		return (0);
5941	}
5942	return (-1);
5943}
5944
5945int
5946pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
5947{
5948	struct loadanchors	*la;
5949
5950	TAILQ_FOREACH(la, &loadanchorshead, entries) {
5951		if (pf->opts & PF_OPT_VERBOSE)
5952			fprintf(stderr, "\nLoading anchor %s from %s\n",
5953			    la->anchorname, la->filename);
5954		if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
5955		    la->anchorname, trans) == -1)
5956			return (-1);
5957	}
5958
5959	return (0);
5960}
5961
5962int
5963kw_casecmp(const void *k, const void *e)
5964{
5965	return (strcasecmp(k, ((const struct keywords *)e)->k_name));
5966}
5967
5968int
5969map_tos(char *s, int *val)
5970{
5971	/* DiffServ Codepoints and other TOS mappings */
5972	const struct keywords	 toswords[] = {
5973		{ "af11",		IPTOS_DSCP_AF11 },
5974		{ "af12",		IPTOS_DSCP_AF12 },
5975		{ "af13",		IPTOS_DSCP_AF13 },
5976		{ "af21",		IPTOS_DSCP_AF21 },
5977		{ "af22",		IPTOS_DSCP_AF22 },
5978		{ "af23",		IPTOS_DSCP_AF23 },
5979		{ "af31",		IPTOS_DSCP_AF31 },
5980		{ "af32",		IPTOS_DSCP_AF32 },
5981		{ "af33",		IPTOS_DSCP_AF33 },
5982		{ "af41",		IPTOS_DSCP_AF41 },
5983		{ "af42",		IPTOS_DSCP_AF42 },
5984		{ "af43",		IPTOS_DSCP_AF43 },
5985		{ "critical",		IPTOS_PREC_CRITIC_ECP },
5986		{ "cs0",		IPTOS_DSCP_CS0 },
5987		{ "cs1",		IPTOS_DSCP_CS1 },
5988		{ "cs2",		IPTOS_DSCP_CS2 },
5989		{ "cs3",		IPTOS_DSCP_CS3 },
5990		{ "cs4",		IPTOS_DSCP_CS4 },
5991		{ "cs5",		IPTOS_DSCP_CS5 },
5992		{ "cs6",		IPTOS_DSCP_CS6 },
5993		{ "cs7",		IPTOS_DSCP_CS7 },
5994		{ "ef",			IPTOS_DSCP_EF },
5995		{ "inetcontrol",	IPTOS_PREC_INTERNETCONTROL },
5996		{ "lowdelay",		IPTOS_LOWDELAY },
5997		{ "netcontrol",		IPTOS_PREC_NETCONTROL },
5998		{ "reliability",	IPTOS_RELIABILITY },
5999		{ "throughput",		IPTOS_THROUGHPUT }
6000	};
6001	const struct keywords	*p;
6002
6003	p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]),
6004	    sizeof(toswords[0]), kw_casecmp);
6005
6006	if (p) {
6007		*val = p->k_val;
6008		return (1);
6009	}
6010	return (0);
6011}
6012