4 * Copyright (c) 2021 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.
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.
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.
35 TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
37 TAILQ_ENTRY(file) entry;
48 struct file *pushfile(const char *, int);
52 void yyerror(const char *, ...)
53 __attribute__((__format__ (printf, 1, 2)))
54 __attribute__((__nonnull__ (1)));
55 void yywarn(const char *, ...)
56 __attribute__((__format__ (printf, 1, 2)))
57 __attribute__((__nonnull__ (1)));
58 int kw_cmp(const void *, const void *);
70 TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
72 TAILQ_ENTRY(sym) entry;
79 int symset(const char *, const char *, int);
80 char *symget(const char *);
82 struct vhost *new_vhost(void);
83 struct location *new_location(void);
84 char *ensure_absolute_path(char*);
85 int check_block_code(int);
86 char *check_block_fmt(char*);
87 int check_strip_no(int);
88 int check_port_num(int);
89 int check_prefork_num(int);
90 void advance_loc(void);
91 void only_once(const void*, const char*);
92 void only_oncei(int, const char*);
93 int fastcgi_conf(char *, char *, char *);
94 void add_param(char *, char *, int);
96 static struct vhost *host;
97 static struct location *loc;
111 /* %define parse.error verbose */
115 %token CA CERT CGI CHROOT CLIENT
117 %token ENTRYPOINT ENV
119 %token INCLUDE INDEX IPV6
121 %token LANG LOCATION LOG
124 %token PARAM PORT PREFORK PROTOCOLS
125 %token REQUIRE RETURN ROOT
126 %token SERVER SPAWN STRIP
127 %token TCP TOEXT TYPE USER
131 %token <v.string> STRING
132 %token <v.number> NUM
134 %type <v.number> bool
135 %type <v.string> string
145 | conf error '\n' { file->errors++; }
148 include : INCLUDE STRING {
151 if ((nfile = pushfile($2, 0)) == NULL) {
152 yyerror("failed to include file %s", $2);
163 bool : ON { $$ = 1; }
167 string : string STRING {
168 if (asprintf(&$$, "%s%s", $1, $2) == -1) {
171 yyerror("string: asprintf: %s", strerror(errno));
180 varset : STRING '=' string {
183 if (isspace((unsigned char)*s)) {
184 yyerror("macro name cannot contain "
197 option : CHROOT string { conf.chroot = $2; }
198 | IPV6 bool { conf.ipv6 = $2; }
199 | MIME STRING string {
200 yywarn("`mime MIME EXT' is deprecated and will be "
201 "removed in a future version, please use the new "
202 "syntax: `map MIME to-ext EXT'");
203 add_mime(&conf.mime, $2, $3);
205 | MAP string TOEXT string { add_mime(&conf.mime, $2, $4); }
206 | PORT NUM { conf.port = check_port_num($2); }
207 | PREFORK NUM { conf.prefork = check_prefork_num($2); }
209 if (tls_config_parse_protocols(&conf.protos, $2) == -1)
210 yyerror("invalid protocols string \"%s\"", $2);
212 | USER string { conf.user = $2; }
215 vhost : SERVER string {
217 TAILQ_INSERT_HEAD(&hosts, host, vhosts);
219 loc = new_location();
220 TAILQ_INSERT_HEAD(&host->locations, loc, locations);
222 loc->match = xstrdup("*");
225 if (strstr($2, "xn--") != NULL) {
226 yywarn("\"%s\" looks like punycode: you "
227 "should use the decoded hostname", $2);
229 } '{' optnl servopts locations '}' {
230 if (host->cert == NULL || host->key == NULL)
231 yyerror("invalid vhost definition: %s", $2);
233 | error '}' { yyerror("bad server directive"); }
236 servopts : /* empty */
237 | servopts servopt optnl
240 servopt : ALIAS string {
243 a = xcalloc(1, sizeof(*a));
245 if (TAILQ_EMPTY(&host->aliases))
246 TAILQ_INSERT_HEAD(&host->aliases, a, aliases);
248 TAILQ_INSERT_TAIL(&host->aliases, a, aliases);
251 only_once(host->cert, "cert");
252 host->cert = ensure_absolute_path($2);
255 only_once(host->cgi, "cgi");
256 /* drop the starting '/', if any */
258 memmove($2, $2+1, strlen($2));
261 | ENTRYPOINT string {
262 only_once(host->entrypoint, "entrypoint");
264 memmove($2, $2+1, strlen($2));
265 host->entrypoint = $2;
267 | ENV string '=' string {
268 add_param($2, $4, 1);
271 only_once(host->key, "key");
272 host->key = ensure_absolute_path($2);
274 | PARAM string '=' string {
275 add_param($2, $4, 0);
280 locations : /* empty */
281 | locations location optnl
284 location : LOCATION { advance_loc(); } string '{' optnl locopts '}' {
285 /* drop the starting '/' if any */
287 memmove($3, $3+1, strlen($3));
293 locopts : /* empty */
294 | locopts locopt optnl
297 locopt : AUTO INDEX bool { loc->auto_index = $3 ? 1 : -1; }
298 | BLOCK RETURN NUM string {
299 only_once(loc->block_fmt, "block");
300 loc->block_fmt = check_block_fmt($4);
301 loc->block_code = check_block_code($3);
304 only_once(loc->block_fmt, "block");
305 loc->block_fmt = xstrdup("temporary failure");
306 loc->block_code = check_block_code($3);
307 if ($3 >= 30 && $3 < 40)
308 yyerror("missing `meta' for block return %d", $3);
311 only_once(loc->block_fmt, "block");
312 loc->block_fmt = xstrdup("temporary failure");
313 loc->block_code = 40;
315 | DEFAULT TYPE string {
316 only_once(loc->default_mime, "default type");
317 loc->default_mime = $3;
321 only_once(loc->index, "index");
325 only_once(loc->lang, "lang");
328 | LOG bool { loc->disable_log = !$2; }
329 | REQUIRE CLIENT CA string {
330 only_once(loc->reqca, "require client ca");
331 ensure_absolute_path($4);
332 if ((loc->reqca = load_ca($4)) == NULL)
333 yyerror("couldn't load ca cert: %s", $4);
337 only_once(loc->dir, "root");
338 loc->dir = ensure_absolute_path($2);
340 | STRIP NUM { loc->strip = check_strip_no($2); }
343 fastcgi : SPAWN string {
344 only_oncei(loc->fcgi, "fastcgi");
345 loc->fcgi = fastcgi_conf(NULL, NULL, $2);
348 only_oncei(loc->fcgi, "fastcgi");
349 loc->fcgi = fastcgi_conf($1, NULL, NULL);
351 | TCP string PORT NUM {
353 if (asprintf(&c, "%d", $4) == -1)
355 only_oncei(loc->fcgi, "fastcgi");
356 loc->fcgi = fastcgi_conf($2, c, NULL);
359 only_oncei(loc->fcgi, "fastcgi");
360 loc->fcgi = fastcgi_conf($2, xstrdup("9000"), NULL);
362 | TCP string PORT string {
363 only_oncei(loc->fcgi, "fastcgi");
364 loc->fcgi = fastcgi_conf($2, $4, NULL);
368 optnl : '\n' optnl /* zero or more newlines */
369 | ';' optnl /* semicolons too */
375 static struct keyword {
379 /* these MUST be sorted */
388 {"default", DEFAULT},
389 {"entrypoint", ENTRYPOINT},
391 {"fastcgi", FASTCGI},
396 {"location", LOCATION},
404 {"prefork", PREFORK},
405 {"protocols", PROTOCOLS},
406 {"require", REQUIRE},
419 yyerror(const char *msg, ...)
426 fprintf(stderr, "%s:%d error: ", config_path, yylval.lineno);
427 vfprintf(stderr, msg, ap);
428 fprintf(stderr, "\n");
433 yywarn(const char *msg, ...)
438 fprintf(stderr, "%s:%d warning: ", config_path, yylval.lineno);
439 vfprintf(stderr, msg, ap);
440 fprintf(stderr, "\n");
445 kw_cmp(const void *k, const void *e)
447 return strcmp(k, ((struct keyword *)e)->word);
453 const struct keyword *p;
455 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
456 sizeof(keywords[0]), kw_cmp);
464 #define START_EXPAND 1
465 #define DONE_EXPAND 2
467 static int expanding;
475 if (file->ungetpos > 0)
476 c = file->ungetbuf[--file->ungetpos];
478 c = getc(file->stream);
480 if (c == START_EXPAND)
482 else if (c == DONE_EXPAND)
496 if ((c = igetc()) == EOF) {
497 yyerror("reached end of file while parsing "
499 if (file == topfile || popfile() == EOF)
506 while ((c = igetc()) == '\\') {
512 yylval.lineno = file->lineno;
518 * Fake EOL when hit EOF for the first time. This gets line
519 * count right if last line in included file is syntactically
520 * invalid and has no newline.
522 if (file->eof_reached == 0) {
523 file->eof_reached = 1;
527 if (file == topfile || popfile() == EOF)
541 if (file->ungetpos >= file->ungetsize) {
542 void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
546 file->ungetsize *= 2;
548 file->ungetbuf[file->ungetpos++] = c;
556 /* Skip to either EOF or the first real EOL. */
579 while ((c = lgetc(0)) == ' ' || c == '\t')
582 yylval.lineno = file->lineno;
584 while ((c = lgetc(0)) != '\n' && c != EOF)
586 if (c == '$' && !expanding) {
588 if ((c = lgetc(0)) == EOF)
590 if (p + 1 >= buf + sizeof(buf) -1) {
591 yyerror("string too long");
594 if (isalnum(c) || c == '_') {
604 yyerror("macro `%s' not defined", buf);
607 yylval.v.string = xstrdup(val);
610 if (c == '@' && !expanding) {
612 if ((c = lgetc(0)) == EOF)
615 if (p + 1 >= buf + sizeof(buf) - 1) {
616 yyerror("string too long");
619 if (isalnum(c) || c == '_') {
629 yyerror("macro '%s' not defined", buf);
632 p = val + strlen(val) - 1;
633 lungetc(DONE_EXPAND);
638 lungetc(START_EXPAND);
647 if ((c = lgetc(quotec)) == EOF)
652 } else if (c == '\\') {
653 if ((next = lgetc(quotec)) == EOF)
655 if (next == quotec || next == ' ' ||
658 else if (next == '\n') {
663 } else if (c == quotec) {
666 } else if (c == '\0') {
667 yyerror("invalid syntax");
670 if (p + 1 >= buf + sizeof(buf) - 1) {
671 yyerror("string too long");
676 yylval.v.string = strdup(buf);
677 if (yylval.v.string == NULL)
678 err(1, "yylex: strdup");
682 #define allowed_to_end_number(x) \
683 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
685 if (c == '-' || isdigit(c)) {
688 if ((size_t)(p-buf) >= sizeof(buf)) {
689 yyerror("string too long");
692 } while ((c = lgetc(0)) != EOF && isdigit(c));
694 if (p == buf + 1 && buf[0] == '-')
696 if (c == EOF || allowed_to_end_number(c)) {
697 const char *errstr = NULL;
700 yylval.v.number = strtonum(buf, LLONG_MIN,
703 yyerror("\"%s\" invalid number: %s",
718 #define allowed_in_string(x) \
719 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
720 x != '{' && x != '}' && \
721 x != '!' && x != '=' && x != '#' && \
722 x != ',' && x != ';'))
724 if (isalnum(c) || c == ':' || c == '_') {
727 if ((size_t)(p-buf) >= sizeof(buf)) {
728 yyerror("string too long");
731 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
734 if ((token = lookup(buf)) == STRING)
735 yylval.v.string = xstrdup(buf);
739 yylval.lineno = file->lineno;
748 pushfile(const char *name, int secret)
752 nfile = xcalloc(1, sizeof(*nfile));
753 nfile->name = xstrdup(name);
754 if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
755 log_warn(NULL, "can't open %s: %s", nfile->name,
761 nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
762 nfile->ungetsize = 16;
763 nfile->ungetbuf = xcalloc(1, nfile->ungetsize);
764 TAILQ_INSERT_TAIL(&files, nfile, entry);
773 if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
774 prev->errors += file->errors;
776 TAILQ_REMOVE(&files, file, entry);
777 fclose(file->stream);
779 free(file->ungetbuf);
782 return file ? 0 : EOF;
786 parse_conf(const char *filename)
788 struct sym *sym, *next;
790 file = pushfile(filename, 0);
796 errors = file->errors;
799 /* Free macros and check which have not been used. */
800 TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
801 /* TODO: warn if !sym->used */
805 TAILQ_REMOVE(&symhead, sym, entry);
815 symset(const char *name, const char *val, int persist)
819 TAILQ_FOREACH(sym, &symhead, entry) {
820 if (!strcmp(name, sym->name))
830 TAILQ_REMOVE(&symhead, sym, entry);
835 sym = xcalloc(1, sizeof(*sym));
836 sym->name = xstrdup(name);
837 sym->val = xstrdup(val);
839 sym->persist = persist;
841 TAILQ_INSERT_TAIL(&symhead, sym, entry);
846 cmdline_symset(char *s)
851 if ((val = strrchr(s, '=')) == NULL)
853 sym = xcalloc(1, val - s + 1);
854 memcpy(sym, s, val - s);
855 ret = symset(sym, val + 1, 1);
861 symget(const char *nam)
865 TAILQ_FOREACH(sym, &symhead, entry) {
866 if (strcmp(nam, sym->name) == 0) {
877 return xcalloc(1, sizeof(struct vhost));
885 l = xcalloc(1, sizeof(*l));
892 ensure_absolute_path(char *path)
894 if (path == NULL || *path != '/')
895 yyerror("not an absolute path: %s", path);
900 check_block_code(int n)
902 if (n < 10 || n >= 70 || (n >= 20 && n <= 29))
903 yyerror("invalid block code %d", n);
908 check_block_fmt(char *fmt)
912 for (s = fmt; *s; ++s) {
923 yyerror("invalid format specifier %%%c", *s);
931 check_strip_no(int n)
934 yyerror("invalid strip number %d", n);
939 check_port_num(int n)
941 if (n <= 0 || n >= UINT16_MAX)
942 yyerror("port number is %s: %d",
943 n <= 0 ? "too small" : "too large",
949 check_prefork_num(int n)
951 if (n <= 0 || n >= PROC_MAX)
952 yyerror("invalid prefork number %d", n);
959 loc = new_location();
960 TAILQ_INSERT_TAIL(&host->locations, loc, locations);
964 only_once(const void *ptr, const char *name)
967 yyerror("`%s' specified more than once", name);
971 only_oncei(int i, const char *name)
974 yyerror("`%s' specified more than once", name);
978 fastcgi_conf(char *path, char *port, char *prog)
983 for (i = 0; i < FCGI_MAX; ++i) {
986 if (f->path == NULL) {
994 /* XXX: what to do with prog? */
995 if (!strcmp(f->path, path) &&
996 ((port == NULL && f->port == NULL) ||
997 !strcmp(f->port, port))) {
1004 yyerror("too much `fastcgi' rules defined.");
1009 add_param(char *name, char *val, int env)
1019 e = xcalloc(1, sizeof(*e));
1023 TAILQ_INSERT_HEAD(h, e, envs);
1025 TAILQ_INSERT_TAIL(h, e, envs);