1/*	$KAME: parser.y,v 1.8 2000/11/08 03:03:34 jinmei Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * 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 * 3. Neither the name of the project nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34%{
35#include <sys/param.h>
36#include <sys/ioctl.h>
37#include <sys/socket.h>
38#include <sys/uio.h>
39#include <sys/queue.h>
40
41#include <net/if.h>
42
43#include <netinet/in.h>
44#include <netinet/in_var.h>
45#include <netinet/icmp6.h>
46
47#include <limits.h>
48#include <netdb.h>
49#include <string.h>
50#include <stdio.h>
51
52#include "rrenumd.h"
53
54struct config_is_set {
55	u_short cis_dest : 1;
56} cis;
57
58struct dst_list *dl_head;
59struct payload_list *pl_head, ple_cur;
60u_int retry;
61char errbuf[LINE_MAX];
62
63extern int lineno;
64extern void yyerror(const char *s);
65extern int yylex(void);
66static struct payload_list * pllist_lookup(int seqnum);
67static void pllist_enqueue(struct payload_list *pl_entry);
68
69#define MAX_RETRYNUM 10 /* upper limit of retry in this rrenumd program */
70#define MAX_SEQNUM 256 /* upper limit of seqnum in this rrenumd program */
71#define NOSPEC	-1
72
73%}
74
75%union {
76	u_long num;
77	struct {
78		char *cp;
79		int len;
80	} cs;
81	struct in_addr addr4;
82	struct in6_addr addr6;
83	struct {
84		struct in6_addr addr;
85		u_char plen;
86	} prefix;
87	struct dst_list *dl;
88	struct payload_list *pl;
89	struct sockaddr *sa;
90}
91
92%token <num> ADD CHANGE SETGLOBAL
93%token DEBUG_CMD DEST_CMD RETRY_CMD SEQNUM_CMD
94%token MATCH_PREFIX_CMD MAXLEN_CMD MINLEN_CMD
95%token USE_PREFIX_CMD KEEPLEN_CMD
96%token VLTIME_CMD PLTIME_CMD
97%token RAF_ONLINK_CMD RAF_AUTO_CMD RAF_DECRVALID_CMD RAF_DECRPREFD_CMD
98%token <num> DAYS HOURS MINUTES SECONDS INFINITY
99%token <num> ON OFF
100%token BCL ECL EOS ERROR
101%token <cs> NAME HOSTNAME QSTRING DECSTRING
102%token <addr4> IPV4ADDR
103%token <addr6> IPV6ADDR
104%token <num> PREFIXLEN
105
106%type <num> retrynum seqnum rrenum_cmd
107%type <num> prefixlen maxlen minlen keeplen vltime pltime
108%type <num> lifetime days hours minutes seconds
109%type <num> decstring
110%type <num> raf_onlink raf_auto raf_decrvalid raf_decrprefd flag
111%type <dl> dest_addrs dest_addr sin sin6
112%type <pl> rrenum_statement
113%type <cs> ifname
114%type <prefix> prefixval
115
116%%
117config:
118		/* empty */
119	| 	statements
120	;
121
122statements:
123		statement
124	| 	statements statement
125	;
126
127statement:
128		debug_statement
129	|	destination_statement
130	|	rrenum_statement_without_seqnum
131	|	rrenum_statement_with_seqnum
132	|	error EOS
133		{
134			yyerrok;
135		}
136	|	EOS
137	;
138
139debug_statement:
140		DEBUG_CMD flag EOS
141		{
142#if YYDEBUG
143			yydebug = $2;
144#endif /* YYDEBUG */
145		}
146	;
147
148destination_statement:
149		DEST_CMD dest_addrs retrynum EOS
150		{
151			dl_head = $2;
152			retry = $3;
153		}
154	;
155
156dest_addrs:
157		dest_addr
158	|	dest_addrs dest_addr
159		{
160			$2->dl_next = $1;
161			$$ = $2;
162		}
163	;
164
165dest_addr :
166		sin
167		{
168			with_v4dest = 1;
169		}
170	|	sin6
171		{
172			with_v6dest = 1;
173		}
174	|	sin6 ifname
175		{
176			struct sockaddr_in6 *sin6;
177
178			sin6 = (struct sockaddr_in6 *)$1->dl_dst;
179			sin6->sin6_scope_id = if_nametoindex($2.cp);
180			with_v6dest = 1;
181			$$ = $1;
182		}
183	|	HOSTNAME
184		{
185			struct sockaddr_storage *ss;
186			struct addrinfo hints, *res;
187			int error;
188
189			memset(&hints, 0, sizeof(hints));
190			hints.ai_flags = AI_CANONNAME;
191			hints.ai_family = AF_UNSPEC;
192			hints.ai_socktype = SOCK_RAW;
193			hints.ai_protocol = 0;
194			error = getaddrinfo($1.cp, 0, &hints, &res);
195			if (error) {
196				snprintf(errbuf, sizeof(errbuf),
197				    "name resolution failed for %s:%s",
198				    $1.cp, gai_strerror(error));
199				yyerror(errbuf);
200			}
201			ss = (struct sockaddr_storage *)malloc(sizeof(*ss));
202			memset(ss, 0, sizeof(*ss));
203			memcpy(ss, res->ai_addr, res->ai_addr->sa_len);
204			freeaddrinfo(res);
205
206			$$ = (struct dst_list *)
207			     malloc(sizeof(struct dst_list));
208			memset($$, 0, sizeof(struct dst_list));
209			$$->dl_dst = (struct sockaddr *)ss;
210		}
211	;
212
213sin:
214		IPV4ADDR
215		{
216			struct sockaddr_in *sin;
217
218			sin = (struct sockaddr_in *)malloc(sizeof(*sin));
219			memset(sin, 0, sizeof(*sin));
220			sin->sin_len = sizeof(*sin);
221			sin->sin_family = AF_INET;
222			sin->sin_addr = $1;
223
224			$$ = (struct dst_list *)
225			     malloc(sizeof(struct dst_list));
226			memset($$, 0, sizeof(struct dst_list));
227			$$->dl_dst = (struct sockaddr *)sin;
228		}
229	;
230
231sin6:
232		IPV6ADDR
233		{
234			struct sockaddr_in6 *sin6;
235
236			sin6 = (struct sockaddr_in6 *)malloc(sizeof(*sin6));
237			memset(sin6, 0, sizeof(*sin6));
238			sin6->sin6_len = sizeof(*sin6);
239			sin6->sin6_family = AF_INET6;
240			sin6->sin6_addr = $1;
241
242			$$ = (struct dst_list *)
243			     malloc(sizeof(struct dst_list));
244			memset($$, 0, sizeof(struct dst_list));
245			$$->dl_dst = (struct sockaddr *)sin6;
246		}
247
248ifname:
249		NAME
250		{
251			$$.cp = strdup($1.cp);
252			$$.len = $1.len;
253		}
254	|	QSTRING
255		{
256			$1.cp[$1.len - 1] = 0;
257			$$.cp = strdup(&$1.cp[1]);
258			$$.len = $1.len - 2;
259		}
260	;
261
262retrynum:
263		/* empty */
264		{
265			$$ = 2;
266		}
267	|	RETRY_CMD decstring
268		{
269			if ($2 > MAX_RETRYNUM)
270				$2 = MAX_RETRYNUM;
271			$$ = $2;
272		}
273	;
274
275rrenum_statement_with_seqnum:
276		SEQNUM_CMD seqnum
277		{
278			if (pllist_lookup($2)) {
279				snprintf(errbuf, sizeof(errbuf),
280				    "duplicate seqnum %ld specified at %d",
281				    $2, lineno);
282				yyerror(errbuf);
283			}
284		}
285		BCL rrenum_statement EOS ECL EOS
286		{
287			$5->pl_irr.rr_seqnum = $2;
288			pllist_enqueue($5);
289		}
290	;
291
292seqnum:
293		/* empty */
294		{
295			$$ = 0;
296		}
297	|	decstring
298		{
299			if ($1 > MAX_SEQNUM) {
300				snprintf(errbuf, sizeof(errbuf),
301				    "seqnum %ld is illegal for this  program. "
302				    "should be between 0 and %d",
303				    $1, MAX_SEQNUM);
304				yyerror(errbuf);
305			}
306			$$ = $1;
307		}
308	;
309
310rrenum_statement_without_seqnum:
311		rrenum_statement EOS
312		{
313			if (pllist_lookup(0)) {
314				snprintf(errbuf, sizeof(errbuf),
315				    "duplicate seqnum %d specified  at %d",
316				    0, lineno);
317				yyerror(errbuf);
318			}
319			$1->pl_irr.rr_seqnum = 0;
320			pllist_enqueue($1);
321		}
322	;
323
324rrenum_statement:
325		match_prefix_definition use_prefix_definition
326		{
327			$$ = (struct payload_list *)
328			     malloc(sizeof(struct payload_list));
329			memcpy($$, &ple_cur, sizeof(ple_cur));
330		}
331	;
332
333match_prefix_definition:
334		rrenum_cmd MATCH_PREFIX_CMD prefixval maxlen minlen
335		{
336			struct rr_pco_match *rpm;
337
338			rpm = &ple_cur.pl_rpm;
339			memset(rpm, 0, sizeof(*rpm));
340
341			rpm->rpm_code = $1;
342			rpm->rpm_prefix = $3.addr;
343			rpm->rpm_matchlen = $3.plen;
344			rpm->rpm_maxlen = $4;
345			rpm->rpm_minlen = $5;
346		}
347	;
348
349rrenum_cmd:
350		/* empty */
351		{
352			$$ = RPM_PCO_ADD;
353		}
354	|	ADD
355	|	CHANGE
356	|	SETGLOBAL
357	;
358
359prefixval:
360		IPV6ADDR prefixlen
361		{
362			$$.addr = $1;
363			$$.plen = $2;
364		}
365	;
366
367prefixlen:
368		/* empty */
369		{
370			$$ = 64;
371		}
372	|	PREFIXLEN
373	;
374
375maxlen:
376		/* empty */
377		{
378			$$ = 128;
379		}
380	|	MAXLEN_CMD decstring
381		{
382			if ($2 > 128)
383				$2 = 128;
384			$$ = $2;
385		}
386	;
387
388minlen:
389		/* empty */
390		{
391			$$ = 0;
392		}
393	|	MINLEN_CMD decstring
394		{
395			if ($2 > 128)
396				$2 = 128;
397			$$ = $2;
398		}
399	;
400
401use_prefix_definition:
402		/* empty */
403		{
404			struct icmp6_router_renum *irr;
405			struct rr_pco_match *rpm;
406			struct rr_pco_use *rpu;
407
408			irr = (struct icmp6_router_renum *)&ple_cur.pl_irr;
409			rpm = (struct rr_pco_match *)(irr + 1);
410			rpu = (struct rr_pco_use *)(rpm + 1);
411			memset(rpu, 0, sizeof(*rpu));
412		}
413	|	USE_PREFIX_CMD prefixval keeplen use_prefix_values
414		{
415			struct icmp6_router_renum *irr;
416			struct rr_pco_match *rpm;
417			struct rr_pco_use *rpu;
418
419			irr = (struct icmp6_router_renum *)&ple_cur.pl_irr;
420			rpm = (struct rr_pco_match *)(irr + 1);
421			rpu = (struct rr_pco_use *)(rpm + 1);
422
423			rpu->rpu_prefix = $2.addr;
424			rpu->rpu_uselen = $2.plen;
425			rpu->rpu_keeplen = $3;
426		}
427	;
428
429use_prefix_values:
430		/* empty */
431		{
432			struct icmp6_router_renum *irr;
433			struct rr_pco_match *rpm;
434			struct rr_pco_use *rpu;
435
436			irr = (struct icmp6_router_renum *)&ple_cur.pl_irr;
437			rpm = (struct rr_pco_match *)(irr + 1);
438			rpu = (struct rr_pco_use *)(rpm + 1);
439			memset(rpu, 0, sizeof(*rpu));
440
441			rpu->rpu_vltime = htonl(DEF_VLTIME);
442			rpu->rpu_pltime = htonl(DEF_PLTIME);
443			rpu->rpu_ramask = 0;
444			rpu->rpu_flags = 0;
445		}
446	|	BCL vltime pltime raf_onlink raf_auto raf_decrvalid raf_decrprefd ECL
447		{
448			struct icmp6_router_renum *irr;
449			struct rr_pco_match *rpm;
450			struct rr_pco_use *rpu;
451
452			irr = (struct icmp6_router_renum *)&ple_cur.pl_irr;
453			rpm = (struct rr_pco_match *)(irr + 1);
454			rpu = (struct rr_pco_use *)(rpm + 1);
455			memset(rpu, 0, sizeof(*rpu));
456
457			rpu->rpu_vltime = $2;
458			rpu->rpu_pltime = $3;
459			if ($4 == NOSPEC) {
460				rpu->rpu_ramask &=
461				    ~ICMP6_RR_PCOUSE_RAFLAGS_ONLINK;
462			} else {
463				rpu->rpu_ramask |=
464				    ICMP6_RR_PCOUSE_RAFLAGS_ONLINK;
465				if ($4 == ON) {
466					rpu->rpu_raflags |=
467					    ICMP6_RR_PCOUSE_RAFLAGS_ONLINK;
468				} else {
469					rpu->rpu_raflags &=
470					    ~ICMP6_RR_PCOUSE_RAFLAGS_ONLINK;
471				}
472			}
473			if ($5 == NOSPEC) {
474				rpu->rpu_ramask &=
475				    ICMP6_RR_PCOUSE_RAFLAGS_AUTO;
476			} else {
477				rpu->rpu_ramask |=
478				    ICMP6_RR_PCOUSE_RAFLAGS_AUTO;
479				if ($5 == ON) {
480					rpu->rpu_raflags |=
481					    ICMP6_RR_PCOUSE_RAFLAGS_AUTO;
482				} else {
483					rpu->rpu_raflags &=
484					    ~ICMP6_RR_PCOUSE_RAFLAGS_AUTO;
485				}
486			}
487			rpu->rpu_flags = 0;
488			if ($6 == ON) {
489				rpu->rpu_flags |=
490				    ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME;
491			}
492			if ($7 == ON) {
493				rpu->rpu_flags |=
494				    ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME;
495			}
496		}
497	;
498
499keeplen:
500		/* empty */
501		{
502			$$ = 0;
503		}
504	|	KEEPLEN_CMD decstring
505		{
506			if ($2 > 128)
507				$2 = 128;
508			$$ = $2;
509		}
510	;
511
512
513vltime:
514		/* empty */
515		{
516			$$ = htonl(DEF_VLTIME);
517		}
518	|	VLTIME_CMD lifetime
519		{
520			$$ = htonl($2);
521		}
522	;
523
524pltime:
525		/* empty */
526		{
527			$$ = htonl(DEF_PLTIME);
528		}
529	|	PLTIME_CMD lifetime
530		{
531			$$ = htonl($2);
532		}
533
534raf_onlink:
535		/* empty */
536		{
537			$$ = NOSPEC;
538		}
539	|	RAF_ONLINK_CMD flag
540		{
541			$$ = $2;
542		}
543	;
544
545raf_auto:
546		/* empty */
547		{
548			$$ = NOSPEC;
549		}
550	|	RAF_AUTO_CMD flag
551		{
552			$$ = $2;
553		}
554	;
555
556raf_decrvalid:
557		/* empty */
558		{
559			$$ = NOSPEC;
560		}
561	|	RAF_DECRVALID_CMD flag
562		{
563			$$ = $2;
564		}
565	;
566
567raf_decrprefd:
568		/* empty */
569		{
570			$$ = NOSPEC;
571		}
572	|	RAF_DECRPREFD_CMD flag
573		{
574			$$ = $2;
575		}
576	;
577
578flag:
579		ON { $$ = ON; }
580	|	OFF { $$ = OFF; }
581	;
582
583lifetime:
584		decstring
585	|	INFINITY
586		{
587			$$ = 0xffffffff;
588		}
589	|	days hours minutes seconds
590		{
591			int d, h, m, s;
592
593			d = $1 * 24 * 60 * 60;
594			h = $2 * 60 * 60;
595			m = $3 * 60;
596			s = $4;
597			$$ = d + h + m + s;
598		}
599	;
600
601days:
602		/* empty */
603		{
604			$$ = 0;
605		}
606	|	DAYS
607	;
608
609hours:
610		/* empty */
611		{
612			$$ = 0;
613		}
614	|	HOURS
615	;
616
617minutes:
618		/* empty */
619		{
620			$$ = 0;
621		}
622	|	MINUTES
623	;
624
625seconds:
626		/* empty */
627		{
628			$$ = 0;
629		}
630	|	SECONDS
631	;
632
633decstring:
634		DECSTRING
635		{
636			int dval;
637
638			dval = atoi($1.cp);
639			$$ = dval;
640		}
641	;
642
643%%
644
645static struct payload_list *
646pllist_lookup(int seqnum)
647{
648	struct payload_list *pl;
649	for (pl = pl_head; pl && pl->pl_irr.rr_seqnum != seqnum;
650	     pl = pl->pl_next)
651		continue;
652	return (pl);
653}
654
655static void
656pllist_enqueue(struct payload_list *pl_entry)
657{
658	struct payload_list *pl, *pl_last;
659
660	pl_last = NULL;
661	for (pl = pl_head;
662	     pl && pl->pl_irr.rr_seqnum < pl_entry->pl_irr.rr_seqnum;
663	     pl_last = pl, pl = pl->pl_next)
664		continue;
665	if (pl_last)
666		pl_last->pl_next = pl_entry;
667	else
668		pl_head = pl_entry;
669
670	return;
671}
672