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Date:: Fri Apr 8 13:52:35 2022 UTC
Message:: don't load the built-in list when using `types'
1%{
2
3/*
4 * Copyright (c) 2021, 2022 Omar Polo <op@omarpolo.com>
5 * Copyright (c) 2018 Florian Obser <florian@openbsd.org>
6 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
7 * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
8 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
9 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
10 * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
11 * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
12 *
13 * Permission to use, copy, modify, and distribute this software for any
14 * purpose with or without fee is hereby granted, provided that the above
15 * copyright notice and this permission notice appear in all copies.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
18 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
20 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
21 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
22 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
23 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 */
25
26#include "gmid.h"
27
28#include <ctype.h>
29#include <errno.h>
30#include <stdarg.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
34
35TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
36static struct file {
37	TAILQ_ENTRY(file)	 entry;
38	FILE			*stream;
39	char			*name;
40	size_t	 		 ungetpos;
41	size_t			 ungetsize;
42	u_char			*ungetbuf;
43	int			 eof_reached;
44	int			 lineno;
45	int			 errors;
46} *file, *topfile;
47
48struct file	*pushfile(const char *, int);
49int		 popfile(void);
50int		 yyparse(void);
51int		 yylex(void);
52void		 yyerror(const char *, ...)
53    __attribute__((__format__ (printf, 1, 2)))
54    __attribute__((__nonnull__ (1)));
55void		 yywarn(const char *, ...)
56    __attribute__((__format__ (printf, 1, 2)))
57    __attribute__((__nonnull__ (1)));
58int		 kw_cmp(const void *, const void *);
59int		 lookup(char *);
60int		 igetc(void);
61int		 lgetc(int);
62void		 lungetc(int);
63int		 findeol(void);
64
65/*
66 * #define YYDEBUG 1
67 * int yydebug = 1;
68 */
69
70TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
71struct sym {
72	TAILQ_ENTRY(sym)	 entry;
73	int			 used;
74	int			 persist;
75	char			*name;
76	char			*val;
77};
78
79int	 symset(const char *, const char *, int);
80char	*symget(const char *);
81
82struct vhost	*new_vhost(void);
83struct location	*new_location(void);
84struct proxy	*new_proxy(void);
85char		*ensure_absolute_path(char*);
86int		 check_block_code(int);
87char		*check_block_fmt(char*);
88int		 check_strip_no(int);
89int		 check_port_num(int);
90int		 check_prefork_num(int);
91void		 advance_loc(void);
92void		 advance_proxy(void);
93void		 parsehp(char *, char **, const char **, const char *);
94void		 only_once(const void*, const char*);
95void		 only_oncei(int, const char*);
96int		 fastcgi_conf(char *, char *, char *);
97void		 add_param(char *, char *, int);
98
99static struct vhost		*host;
100static struct location		*loc;
101static struct proxy		*proxy;
102static char			*current_media;
103static int			 errors;
104
105typedef struct {
106	union {
107		char	*string;
108		int	 number;
109	} v;
110	int lineno;
111} YYSTYPE;
112
113%}
114
115/* for bison: */
116/* %define parse.error verbose */
117
118%token	ALIAS AUTO
119%token	BLOCK
120%token	CA CERT CGI CHROOT CLIENT
121%token	DEFAULT
122%token	ENTRYPOINT ENV
123%token	FASTCGI FOR_HOST
124%token	INCLUDE INDEX IPV6
125%token	KEY
126%token	LANG LOCATION LOG
127%token	MAP MIME
128%token	OCSP OFF ON
129%token	PARAM PORT PREFORK PROTO PROTOCOLS PROXY
130%token	RELAY_TO REQUIRE RETURN ROOT
131%token	SERVER SNI SPAWN STRIP
132%token	TCP TOEXT TYPE TYPES
133%token	USE_TLS USER
134%token	VERIFYNAME
135
136%token	ERROR
137
138%token	<v.string>	STRING
139%token	<v.number>	NUM
140
141%type	<v.number>	bool
142%type	<v.string>	string numberstring
143
144%%
145
146conf		: /* empty */
147		| conf include '\n'
148		| conf '\n'
149		| conf varset '\n'
150		| conf option '\n'
151		| conf vhost '\n'
152		| conf types '\n'
153		| conf error '\n'		{ file->errors++; }
154		;
155
156include		: INCLUDE STRING		{
157			struct file	*nfile;
158
159			if ((nfile = pushfile($2, 0)) == NULL) {
160				yyerror("failed to include file %s", $2);
161				free($2);
162				YYERROR;
163			}
164			free($2);
165
166			file = nfile;
167			lungetc('\n');
168		}
169		;
170
171bool		: ON	{ $$ = 1; }
172		| OFF	{ $$ = 0; }
173		;
174
175string		: string STRING	{
176			if (asprintf(&$$, "%s%s", $1, $2) == -1) {
177				free($1);
178				free($2);
179				yyerror("string: asprintf: %s", strerror(errno));
180				YYERROR;
181			}
182			free($1);
183			free($2);
184		}
185		| STRING
186		;
187
188numberstring	: NUM {
189			char *s;
190			if (asprintf(&s, "%d", $1) == -1) {
191				yyerror("asprintf: number");
192				YYERROR;
193			}
194			$$ = s;
195		}
196		| STRING
197		;
198
199varset		: STRING '=' string		{
200			char *s = $1;
201			while (*s++) {
202				if (isspace((unsigned char)*s)) {
203					yyerror("macro name cannot contain "
204					    "whitespaces");
205					free($1);
206					free($3);
207					YYERROR;
208				}
209			}
210			symset($1, $3, 0);
211			free($1);
212			free($3);
213		}
214		;
215
216option		: CHROOT string	{ conf.chroot = $2; }
217		| IPV6 bool		{ conf.ipv6 = $2; }
218		| MIME STRING string	{
219			yywarn("`mime MIME EXT' is deprecated and will be "
220			    "removed in a future version, please use the new "
221			    "`types' block.");
222			if (add_mime(&conf.mime, $2, $3) == -1)
223				err(1, "add_mime");
224		}
225		| MAP string TOEXT string {
226			yywarn("`map mime to-ext' is deprecated and will be "
227			    "removed in a future version, please use the new "
228			    "`types' block.");
229			if (add_mime(&conf.mime, $2, $4) == -1)
230				err(1, "add_mime");
231		}
232		| PORT NUM		{ conf.port = check_port_num($2); }
233		| PREFORK NUM		{ conf.prefork = check_prefork_num($2); }
234		| PROTOCOLS string {
235			if (tls_config_parse_protocols(&conf.protos, $2) == -1)
236				yyerror("invalid protocols string \"%s\"", $2);
237			free($2);
238		}
239		| USER string		{ conf.user = $2; }
240		;
241
242vhost		: SERVER string {
243			host = new_vhost();
244			TAILQ_INSERT_HEAD(&hosts, host, vhosts);
245
246			loc = new_location();
247			TAILQ_INSERT_HEAD(&host->locations, loc, locations);
248
249			TAILQ_INIT(&host->proxies);
250
251			loc->match = xstrdup("*");
252			host->domain = $2;
253
254			if (strstr($2, "xn--") != NULL) {
255				yywarn("\"%s\" looks like punycode: you "
256				    "should use the decoded hostname", $2);
257			}
258		} '{' optnl servbody '}' {
259			if (host->cert == NULL || host->key == NULL)
260				yyerror("invalid vhost definition: %s", $2);
261		}
262		| error '}'		{ yyerror("bad server directive"); }
263		;
264
265servbody	: /* empty */
266		| servbody servopt optnl
267		| servbody location optnl
268		| servbody proxy optnl
269		;
270
271servopt		: ALIAS string {
272			struct alist *a;
273
274			a = xcalloc(1, sizeof(*a));
275			a->alias = $2;
276			if (TAILQ_EMPTY(&host->aliases))
277				TAILQ_INSERT_HEAD(&host->aliases, a, aliases);
278			else
279				TAILQ_INSERT_TAIL(&host->aliases, a, aliases);
280		}
281		| CERT string		{
282			only_once(host->cert, "cert");
283			host->cert = ensure_absolute_path($2);
284		}
285		| CGI string		{
286			only_once(host->cgi, "cgi");
287			/* drop the starting '/', if any */
288			if (*$2 == '/')
289				memmove($2, $2+1, strlen($2));
290			host->cgi = $2;
291		}
292		| ENTRYPOINT string {
293			only_once(host->entrypoint, "entrypoint");
294			while (*$2 == '/')
295				memmove($2, $2+1, strlen($2));
296			host->entrypoint = $2;
297		}
298		| ENV string '=' string {
299			add_param($2, $4, 1);
300		}
301		| KEY string		{
302			only_once(host->key, "key");
303			host->key  = ensure_absolute_path($2);
304		}
305		| OCSP string		{
306			only_once(host->ocsp, "ocsp");
307			host->ocsp = ensure_absolute_path($2);
308		}
309		| PARAM string '=' string {
310			add_param($2, $4, 0);
311		}
312		| locopt
313		;
314
315proxy		: PROXY { advance_proxy(); }
316		  proxy_matches '{' optnl proxy_opts '}' {
317			if (proxy->host == NULL)
318				yyerror("invalid proxy block: missing `relay-to' option");
319
320			if ((proxy->cert == NULL && proxy->key != NULL) ||
321			    (proxy->cert != NULL && proxy->key == NULL))
322				yyerror("invalid proxy block: missing cert or key");
323		}
324		;
325
326proxy_matches	: /* empty */
327		| proxy_matches proxy_match
328		;
329
330proxy_match	: PROTO string {
331			only_once(proxy->match_proto, "proxy proto");
332			free(proxy->match_proto);
333			proxy->match_proto = $2;
334		}
335		| FOR_HOST string {
336			only_once(proxy->match_host, "proxy for-host");
337			free(proxy->match_host);
338			parsehp($2, &proxy->match_host, &proxy->match_port, "10965");
339		}
340		;
341
342proxy_opts	: /* empty */
343		| proxy_opts proxy_opt optnl
344		;
345
346proxy_opt	: CERT string {
347			only_once(proxy->cert, "proxy cert");
348			tls_unload_file(proxy->cert, proxy->certlen);
349			ensure_absolute_path($2);
350			proxy->cert = tls_load_file($2, &proxy->certlen, NULL);
351			if (proxy->cert == NULL)
352				yyerror("can't load cert %s", $2);
353			free($2);
354		}
355		| KEY string {
356			only_once(proxy->key, "proxy key");
357			tls_unload_file(proxy->key, proxy->keylen);
358			ensure_absolute_path($2);
359			proxy->key = tls_load_file($2, &proxy->keylen, NULL);
360			if (proxy->key == NULL)
361				yyerror("can't load key %s", $2);
362			free($2);
363		}
364		| PROTOCOLS string {
365			if (tls_config_parse_protocols(&proxy->protocols, $2) == -1)
366				yyerror("invalid protocols string \"%s\"", $2);
367			free($2);
368		}
369		| RELAY_TO string {
370			only_once(proxy->host, "proxy relay-to");
371			free(proxy->host);
372			parsehp($2, &proxy->host, &proxy->port, "1965");
373		}
374		| REQUIRE CLIENT CA string {
375			only_once(proxy->reqca, "require client ca");
376			ensure_absolute_path($4);
377			if ((proxy->reqca = load_ca($4)) == NULL)
378				yyerror("couldn't load ca cert: %s", $4);
379			free($4);
380		}
381		| SNI string {
382			only_once(proxy->sni, "proxy sni");
383			free(proxy->sni);
384			proxy->sni = $2;
385		}
386		| USE_TLS bool {
387			proxy->notls = !$2;
388		}
389		| VERIFYNAME bool {
390			proxy->noverifyname = !$2;
391		}
392		;
393
394location	: LOCATION { advance_loc(); } string '{' optnl locopts '}' {
395			/* drop the starting '/' if any */
396			if (*$3 == '/')
397				memmove($3, $3+1, strlen($3));
398			loc->match = $3;
399		}
400		| error '}'
401		;
402
403locopts		: /* empty */
404		| locopts locopt optnl
405		;
406
407locopt		: AUTO INDEX bool	{ loc->auto_index = $3 ? 1 : -1; }
408		| BLOCK RETURN NUM string {
409			only_once(loc->block_fmt, "block");
410			loc->block_fmt = check_block_fmt($4);
411			loc->block_code = check_block_code($3);
412		}
413		| BLOCK RETURN NUM {
414			only_once(loc->block_fmt, "block");
415			loc->block_fmt = xstrdup("temporary failure");
416			loc->block_code = check_block_code($3);
417			if ($3 >= 30 && $3 < 40)
418				yyerror("missing `meta' for block return %d", $3);
419		}
420		| BLOCK {
421			only_once(loc->block_fmt, "block");
422			loc->block_fmt = xstrdup("temporary failure");
423			loc->block_code = 40;
424		}
425		| DEFAULT TYPE string {
426			only_once(loc->default_mime, "default type");
427			loc->default_mime = $3;
428		}
429		| FASTCGI fastcgi
430		| INDEX string {
431			only_once(loc->index, "index");
432			loc->index = $2;
433		}
434		| LANG string {
435			only_once(loc->lang, "lang");
436			loc->lang = $2;
437		}
438		| LOG bool	{ loc->disable_log = !$2; }
439		| REQUIRE CLIENT CA string {
440			only_once(loc->reqca, "require client ca");
441			ensure_absolute_path($4);
442			if ((loc->reqca = load_ca($4)) == NULL)
443				yyerror("couldn't load ca cert: %s", $4);
444			free($4);
445		}
446		| ROOT string		{
447			only_once(loc->dir, "root");
448			loc->dir  = ensure_absolute_path($2);
449		}
450		| STRIP NUM		{ loc->strip = check_strip_no($2); }
451		;
452
453fastcgi		: SPAWN string {
454			only_oncei(loc->fcgi, "fastcgi");
455			loc->fcgi = fastcgi_conf(NULL, NULL, $2);
456		}
457		| string {
458			only_oncei(loc->fcgi, "fastcgi");
459			loc->fcgi = fastcgi_conf($1, NULL, NULL);
460		}
461		| TCP string PORT NUM {
462			char *c;
463			if (asprintf(&c, "%d", $4) == -1)
464				err(1, "asprintf");
465			only_oncei(loc->fcgi, "fastcgi");
466			loc->fcgi = fastcgi_conf($2, c, NULL);
467		}
468		| TCP string {
469			only_oncei(loc->fcgi, "fastcgi");
470			loc->fcgi = fastcgi_conf($2, xstrdup("9000"), NULL);
471		}
472		| TCP string PORT string {
473			only_oncei(loc->fcgi, "fastcgi");
474			loc->fcgi = fastcgi_conf($2, $4, NULL);
475		}
476		;
477
478types		: TYPES '{' optnl mediaopts_l '}' {
479			conf.mime.skip_defaults = 1;
480		}
481		;
482
483mediaopts_l	: mediaopts_l mediaoptsl nl
484		| mediaoptsl nl
485		;
486
487mediaoptsl	: STRING { current_media = $1; } medianames_l optsemicolon
488		| include
489		;
490
491medianames_l	: medianames_l medianamesl
492		| medianamesl
493		;
494
495medianamesl	: numberstring {
496			if (add_mime(&conf.mime, current_media, $1) == -1)
497				err(1, "add_mime");
498		}
499		;
500
501nl		: '\n' optnl
502		;
503
504optnl		: '\n' optnl		/* zero or more newlines */
505		| ';' optnl		/* semicolons too */
506		| /*empty*/
507		;
508
509optsemicolon	: ';'
510		|
511		;
512
513%%
514
515static const struct keyword {
516	const char *word;
517	int token;
518} keywords[] = {
519	/* these MUST be sorted */
520	{"alias", ALIAS},
521	{"auto", AUTO},
522	{"block", BLOCK},
523	{"ca", CA},
524	{"cert", CERT},
525	{"cgi", CGI},
526	{"chroot", CHROOT},
527	{"client", CLIENT},
528	{"default", DEFAULT},
529	{"entrypoint", ENTRYPOINT},
530	{"env", ENV},
531	{"fastcgi", FASTCGI},
532	{"for-host", FOR_HOST},
533	{"include", INCLUDE},
534	{"index", INDEX},
535	{"ipv6", IPV6},
536	{"key", KEY},
537	{"lang", LANG},
538	{"location", LOCATION},
539	{"log", LOG},
540	{"map", MAP},
541	{"mime", MIME},
542	{"ocsp", OCSP},
543	{"off", OFF},
544	{"on", ON},
545	{"param", PARAM},
546	{"port", PORT},
547	{"prefork", PREFORK},
548	{"proto", PROTO},
549	{"protocols", PROTOCOLS},
550	{"proxy", PROXY},
551	{"relay-to", RELAY_TO},
552	{"require", REQUIRE},
553	{"return", RETURN},
554	{"root", ROOT},
555	{"server", SERVER},
556	{"sni", SNI},
557	{"spawn", SPAWN},
558	{"strip", STRIP},
559	{"tcp", TCP},
560	{"to-ext", TOEXT},
561	{"type", TYPE},
562	{"types", TYPES},
563	{"use-tls", USE_TLS},
564	{"user", USER},
565	{"verifyname", VERIFYNAME},
566};
567
568void
569yyerror(const char *msg, ...)
570{
571	va_list ap;
572
573	file->errors++;
574
575	va_start(ap, msg);
576	fprintf(stderr, "%s:%d error: ", config_path, yylval.lineno);
577	vfprintf(stderr, msg, ap);
578	fprintf(stderr, "\n");
579	va_end(ap);
580}
581
582void
583yywarn(const char *msg, ...)
584{
585	va_list ap;
586
587	va_start(ap, msg);
588	fprintf(stderr, "%s:%d warning: ", config_path, yylval.lineno);
589	vfprintf(stderr, msg, ap);
590	fprintf(stderr, "\n");
591	va_end(ap);
592}
593
594int
595kw_cmp(const void *k, const void *e)
596{
597	return strcmp(k, ((struct keyword *)e)->word);
598}
599
600int
601lookup(char *s)
602{
603	const struct keyword	*p;
604
605	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
606	    sizeof(keywords[0]), kw_cmp);
607
608	if (p)
609		return p->token;
610	else
611		return STRING;
612}
613
614#define START_EXPAND	1
615#define DONE_EXPAND	2
616
617static int	expanding;
618
619int
620igetc(void)
621{
622	int	c;
623
624	while (1) {
625		if (file->ungetpos > 0)
626			c = file->ungetbuf[--file->ungetpos];
627		else
628			c = getc(file->stream);
629
630		if (c == START_EXPAND)
631			expanding = 1;
632		else if (c == DONE_EXPAND)
633			expanding = 0;
634		else
635			break;
636	}
637	return c;
638}
639
640int
641lgetc(int quotec)
642{
643	int		c, next;
644
645	if (quotec) {
646		if ((c = igetc()) == EOF) {
647			yyerror("reached end of file while parsing "
648			    "quoted string");
649			if (file == topfile || popfile() == EOF)
650				return EOF;
651			return quotec;
652		}
653		return c;
654	}
655
656	while ((c = igetc()) == '\\') {
657		next = igetc();
658		if (next != '\n') {
659			c = next;
660			break;
661		}
662		yylval.lineno = file->lineno;
663		file->lineno++;
664	}
665
666	if (c == EOF) {
667		/*
668		 * Fake EOL when hit EOF for the first time. This gets line
669		 * count right if last line in included file is syntactically
670		 * invalid and has no newline.
671		 */
672		if (file->eof_reached == 0) {
673			file->eof_reached = 1;
674			return '\n';
675		}
676		while (c == EOF) {
677			if (file == topfile || popfile() == EOF)
678				return EOF;
679			c = igetc();
680		}
681	}
682	return c;
683}
684
685void
686lungetc(int c)
687{
688	if (c == EOF)
689		return;
690
691	if (file->ungetpos >= file->ungetsize) {
692		void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
693		if (p == NULL)
694			err(1, "lungetc");
695		file->ungetbuf = p;
696		file->ungetsize *= 2;
697	}
698	file->ungetbuf[file->ungetpos++] = c;
699}
700
701int
702findeol(void)
703{
704	int	c;
705
706	/* Skip to either EOF or the first real EOL. */
707	while (1) {
708		c = lgetc(0);
709		if (c == '\n') {
710			file->lineno++;
711			break;
712		}
713		if (c == EOF)
714			break;
715	}
716	return ERROR;
717}
718
719int
720yylex(void)
721{
722	char	 buf[8096];
723	char	*p, *val;
724	int	 quotec, next, c;
725	int	 token;
726
727top:
728	p = buf;
729	while ((c = lgetc(0)) == ' ' || c == '\t')
730		; /* nothing */
731
732	yylval.lineno = file->lineno;
733	if (c == '#')
734		while ((c = lgetc(0)) != '\n' && c != EOF)
735			; /* nothing */
736	if (c == '$' && !expanding) {
737		while (1) {
738			if ((c = lgetc(0)) == EOF)
739				return 0;
740			if (p + 1 >= buf + sizeof(buf) -1) {
741				yyerror("string too long");
742				return findeol();
743			}
744			if (isalnum(c) || c == '_') {
745				*p++ = c;
746				continue;
747			}
748			*p = '\0';
749			lungetc(c);
750			break;
751		}
752		val = symget(buf);
753		if (val == NULL) {
754			yyerror("macro `%s' not defined", buf);
755			return findeol();
756		}
757		yylval.v.string = xstrdup(val);
758		return STRING;
759	}
760	if (c == '@' && !expanding) {
761		while (1) {
762			if ((c = lgetc(0)) == EOF)
763				return 0;
764
765			if (p + 1 >= buf + sizeof(buf) - 1) {
766				yyerror("string too long");
767				return findeol();
768			}
769			if (isalnum(c) || c == '_') {
770				*p++ = c;
771				continue;
772			}
773			*p = '\0';
774			lungetc(c);
775			break;
776		}
777		val = symget(buf);
778		if (val == NULL) {
779			yyerror("macro '%s' not defined", buf);
780			return findeol();
781		}
782		p = val + strlen(val) - 1;
783		lungetc(DONE_EXPAND);
784		while (p >= val) {
785			lungetc(*p);
786			p--;
787		}
788		lungetc(START_EXPAND);
789		goto top;
790	}
791
792	switch (c) {
793	case '\'':
794	case '"':
795		quotec = c;
796		while (1) {
797			if ((c = lgetc(quotec)) == EOF)
798				return 0;
799			if (c == '\n') {
800				file->lineno++;
801				continue;
802			} else if (c == '\\') {
803				if ((next = lgetc(quotec)) == EOF)
804					return (0);
805				if (next == quotec || next == ' ' ||
806				    next == '\t')
807					c = next;
808				else if (next == '\n') {
809					file->lineno++;
810					continue;
811				} else
812					lungetc(next);
813			} else if (c == quotec) {
814				*p = '\0';
815				break;
816			} else if (c == '\0') {
817				yyerror("invalid syntax");
818				return findeol();
819			}
820			if (p + 1 >= buf + sizeof(buf) - 1) {
821				yyerror("string too long");
822				return findeol();
823			}
824			*p++ = c;
825		}
826		yylval.v.string = strdup(buf);
827		if (yylval.v.string == NULL)
828			err(1, "yylex: strdup");
829		return STRING;
830	}
831
832#define allowed_to_end_number(x) \
833	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
834
835	if (c == '-' || isdigit(c)) {
836		do {
837			*p++ = c;
838			if ((size_t)(p-buf) >= sizeof(buf)) {
839				yyerror("string too long");
840				return findeol();
841			}
842		} while ((c = lgetc(0)) != EOF && isdigit(c));
843		lungetc(c);
844		if (p == buf + 1 && buf[0] == '-')
845			goto nodigits;
846		if (c == EOF || allowed_to_end_number(c)) {
847			const char *errstr = NULL;
848
849			*p = '\0';
850			yylval.v.number = strtonum(buf, LLONG_MIN,
851			    LLONG_MAX, &errstr);
852			if (errstr) {
853				yyerror("\"%s\" invalid number: %s",
854				    buf, errstr);
855				return findeol();
856			}
857			return NUM;
858		} else {
859nodigits:
860			while (p > buf + 1)
861				lungetc(*--p);
862			c = *--p;
863			if (c == '-')
864				return c;
865		}
866	}
867
868#define allowed_in_string(x) \
869	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
870	x != '{' && x != '}' && \
871	x != '!' && x != '=' && x != '#' && \
872	x != ',' && x != ';'))
873
874	if (isalnum(c) || c == ':' || c == '_') {
875		do {
876			*p++ = c;
877			if ((size_t)(p-buf) >= sizeof(buf)) {
878				yyerror("string too long");
879				return findeol();
880			}
881		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
882		lungetc(c);
883		*p = '\0';
884		if ((token = lookup(buf)) == STRING)
885			yylval.v.string = xstrdup(buf);
886		return token;
887	}
888	if (c == '\n') {
889		yylval.lineno = file->lineno;
890		file->lineno++;
891	}
892	if (c == EOF)
893		return 0;
894	return c;
895}
896
897struct file *
898pushfile(const char *name, int secret)
899{
900	struct file	*nfile;
901
902	nfile = xcalloc(1, sizeof(*nfile));
903	nfile->name = xstrdup(name);
904	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
905		log_warn(NULL, "can't open %s: %s", nfile->name,
906		    strerror(errno));
907		free(nfile->name);
908		free(nfile);
909		return NULL;
910	}
911	nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
912	nfile->ungetsize = 16;
913	nfile->ungetbuf = xcalloc(1, nfile->ungetsize);
914	TAILQ_INSERT_TAIL(&files, nfile, entry);
915	return nfile;
916}
917
918int
919popfile(void)
920{
921	struct file	*prev;
922
923	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
924		prev->errors += file->errors;
925
926	TAILQ_REMOVE(&files, file, entry);
927	fclose(file->stream);
928	free(file->name);
929	free(file->ungetbuf);
930	free(file);
931	file = prev;
932	return file ? 0 : EOF;
933}
934
935void
936parse_conf(const char *filename)
937{
938	struct sym		*sym, *next;
939
940	file = pushfile(filename, 0);
941	if (file == NULL)
942		exit(1);
943	topfile = file;
944
945	yyparse();
946	errors = file->errors;
947	popfile();
948
949	/* Free macros and check which have not been used. */
950	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
951		/* TODO: warn if !sym->used */
952		if (!sym->persist) {
953			free(sym->name);
954			free(sym->val);
955			TAILQ_REMOVE(&symhead, sym, entry);
956			free(sym);
957		}
958	}
959
960	if (errors)
961		exit(1);
962}
963
964void
965print_conf(void)
966{
967	struct vhost	*h;
968	/* struct location	*l; */
969	/* struct envlist	*e; */
970	/* struct alist	*a; */
971
972	if (conf.chroot != NULL)
973		printf("chroot \"%s\"\n", conf.chroot);
974	printf("ipv6 %s\n", conf.ipv6 ? "on" : "off");
975	/* XXX: defined mimes? */
976	printf("port %d\n", conf.port);
977	printf("prefork %d\n", conf.prefork);
978	/* XXX: protocols? */
979	if (conf.user != NULL)
980		printf("user \"%s\"\n", conf.user);
981
982	TAILQ_FOREACH(h, &hosts, vhosts) {
983		printf("\nserver \"%s\" {\n", h->domain);
984		printf("	cert \"%s\"\n", h->cert);
985		printf("	key \"%s\"\n", h->key);
986		/* TODO: print locations... */
987		printf("}\n");
988	}
989}
990
991int
992symset(const char *name, const char *val, int persist)
993{
994	struct sym *sym;
995
996	TAILQ_FOREACH(sym, &symhead, entry) {
997		if (!strcmp(name, sym->name))
998			break;
999	}
1000
1001	if (sym != NULL) {
1002		if (sym->persist)
1003			return 0;
1004		else {
1005			free(sym->name);
1006			free(sym->val);
1007			TAILQ_REMOVE(&symhead, sym, entry);
1008			free(sym);
1009		}
1010	}
1011
1012	sym = xcalloc(1, sizeof(*sym));
1013	sym->name = xstrdup(name);
1014	sym->val = xstrdup(val);
1015	sym->used = 0;
1016	sym->persist = persist;
1017
1018	TAILQ_INSERT_TAIL(&symhead, sym, entry);
1019	return 0;
1020}
1021
1022int
1023cmdline_symset(char *s)
1024{
1025	char	*sym, *val;
1026	int	 ret;
1027
1028	if ((val = strrchr(s, '=')) == NULL)
1029		return -1;
1030	sym = xcalloc(1, val - s + 1);
1031	memcpy(sym, s, val - s);
1032	ret = symset(sym, val + 1, 1);
1033	free(sym);
1034	return ret;
1035}
1036
1037char *
1038symget(const char *nam)
1039{
1040	struct sym	*sym;
1041
1042	TAILQ_FOREACH(sym, &symhead, entry) {
1043		if (strcmp(nam, sym->name) == 0) {
1044			sym->used = 1;
1045			return sym->val;
1046		}
1047	}
1048	return NULL;
1049}
1050
1051struct vhost *
1052new_vhost(void)
1053{
1054	return xcalloc(1, sizeof(struct vhost));
1055}
1056
1057struct location *
1058new_location(void)
1059{
1060	struct location *l;
1061
1062	l = xcalloc(1, sizeof(*l));
1063	l->dirfd = -1;
1064	l->fcgi = -1;
1065	return l;
1066}
1067
1068struct proxy *
1069new_proxy(void)
1070{
1071	struct proxy *p;
1072
1073	p = xcalloc(1, sizeof(*p));
1074	p->protocols = TLS_PROTOCOLS_DEFAULT;
1075	return p;
1076}
1077
1078char *
1079ensure_absolute_path(char *path)
1080{
1081	if (path == NULL || *path != '/')
1082		yyerror("not an absolute path: %s", path);
1083	return path;
1084}
1085
1086int
1087check_block_code(int n)
1088{
1089	if (n < 10 || n >= 70 || (n >= 20 && n <= 29))
1090		yyerror("invalid block code %d", n);
1091	return n;
1092}
1093
1094char *
1095check_block_fmt(char *fmt)
1096{
1097	char *s;
1098
1099	for (s = fmt; *s; ++s) {
1100		if (*s != '%')
1101			continue;
1102		switch (*++s) {
1103		case '%':
1104		case 'p':
1105		case 'q':
1106		case 'P':
1107		case 'N':
1108			break;
1109		default:
1110			yyerror("invalid format specifier %%%c", *s);
1111		}
1112	}
1113
1114	return fmt;
1115}
1116
1117int
1118check_strip_no(int n)
1119{
1120	if (n <= 0)
1121		yyerror("invalid strip number %d", n);
1122	return n;
1123}
1124
1125int
1126check_port_num(int n)
1127{
1128	if (n <= 0 || n >= UINT16_MAX)
1129		yyerror("port number is %s: %d",
1130		    n <= 0 ? "too small" : "too large",
1131		    n);
1132	return n;
1133}
1134
1135int
1136check_prefork_num(int n)
1137{
1138	if (n <= 0 || n >= PROC_MAX)
1139		yyerror("invalid prefork number %d", n);
1140	return n;
1141}
1142
1143void
1144advance_loc(void)
1145{
1146	loc = new_location();
1147	TAILQ_INSERT_TAIL(&host->locations, loc, locations);
1148}
1149
1150void
1151advance_proxy(void)
1152{
1153	proxy = new_proxy();
1154	TAILQ_INSERT_TAIL(&host->proxies, proxy, proxies);
1155}
1156
1157void
1158parsehp(char *str, char **host, const char **port, const char *def)
1159{
1160	char		*at;
1161	const char	*errstr;
1162
1163	*host = str;
1164
1165	if ((at = strchr(str, ':')) != NULL) {
1166		*at++ = '\0';
1167		*port = at;
1168	} else
1169		*port = def;
1170
1171	strtonum(*port, 1, UINT16_MAX, &errstr);
1172	if (errstr != NULL)
1173		yyerror("port is %s: %s", errstr, *port);
1174}
1175
1176void
1177only_once(const void *ptr, const char *name)
1178{
1179	if (ptr != NULL)
1180		yyerror("`%s' specified more than once", name);
1181}
1182
1183void
1184only_oncei(int i, const char *name)
1185{
1186	if (i != -1)
1187		yyerror("`%s' specified more than once", name);
1188}
1189
1190int
1191fastcgi_conf(char *path, char *port, char *prog)
1192{
1193	struct fcgi	*f;
1194	int		i;
1195
1196	for (i = 0; i < FCGI_MAX; ++i) {
1197		f = &fcgi[i];
1198
1199		if (f->path == NULL) {
1200			f->id = i;
1201			f->path = path;
1202			f->port = port;
1203			f->prog = prog;
1204			return i;
1205		}
1206
1207		/* XXX: what to do with prog? */
1208		if (!strcmp(f->path, path) &&
1209		    ((port == NULL && f->port == NULL) ||
1210		     !strcmp(f->port, port))) {
1211			free(path);
1212			free(port);
1213			return i;
1214		}
1215	}
1216
1217	yyerror("too much `fastcgi' rules defined.");
1218	return -1;
1219}
1220
1221void
1222add_param(char *name, char *val, int env)
1223{
1224	struct envlist *e;
1225	struct envhead *h;
1226
1227	if (env)
1228		h = &host->env;
1229	else
1230		h = &host->params;
1231
1232	e = xcalloc(1, sizeof(*e));
1233	e->name = name;
1234	e->value = val;
1235	if (TAILQ_EMPTY(h))
1236		TAILQ_INSERT_HEAD(h, e, envs);
1237	else
1238		TAILQ_INSERT_TAIL(h, e, envs);
1239}