1 13b2bc37 2022-10-23 stsp /*
  2 13b2bc37 2022-10-23 stsp  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 13b2bc37 2022-10-23 stsp  * Copyright (c) 2016-2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
  4 13b2bc37 2022-10-23 stsp  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
  5 13b2bc37 2022-10-23 stsp  * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
  6 13b2bc37 2022-10-23 stsp  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
  7 13b2bc37 2022-10-23 stsp  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  8 13b2bc37 2022-10-23 stsp  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
  9 13b2bc37 2022-10-23 stsp  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 10 13b2bc37 2022-10-23 stsp  *
 11 13b2bc37 2022-10-23 stsp  * Permission to use, copy, modify, and distribute this software for any
 12 13b2bc37 2022-10-23 stsp  * purpose with or without fee is hereby granted, provided that the above
 13 13b2bc37 2022-10-23 stsp  * copyright notice and this permission notice appear in all copies.
 14 13b2bc37 2022-10-23 stsp  *
 15 13b2bc37 2022-10-23 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 16 13b2bc37 2022-10-23 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 17 13b2bc37 2022-10-23 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 18 13b2bc37 2022-10-23 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 19 13b2bc37 2022-10-23 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 20 13b2bc37 2022-10-23 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 21 13b2bc37 2022-10-23 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 22 13b2bc37 2022-10-23 stsp  */
 23 13b2bc37 2022-10-23 stsp 
 24 13b2bc37 2022-10-23 stsp %{
 25 13b2bc37 2022-10-23 stsp #include <sys/time.h>
 26 13b2bc37 2022-10-23 stsp #include <sys/types.h>
 27 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
 28 13b2bc37 2022-10-23 stsp #include <sys/stat.h>
 29 13b2bc37 2022-10-23 stsp 
 30 13b2bc37 2022-10-23 stsp #include <ctype.h>
 31 13b2bc37 2022-10-23 stsp #include <err.h>
 32 13b2bc37 2022-10-23 stsp #include <errno.h>
 33 13b2bc37 2022-10-23 stsp #include <event.h>
 34 13b2bc37 2022-10-23 stsp #include <imsg.h>
 35 13b2bc37 2022-10-23 stsp #include <limits.h>
 36 13b2bc37 2022-10-23 stsp #include <sha1.h>
 37 13b2bc37 2022-10-23 stsp #include <stdarg.h>
 38 13b2bc37 2022-10-23 stsp #include <stdlib.h>
 39 13b2bc37 2022-10-23 stsp #include <stdio.h>
 40 13b2bc37 2022-10-23 stsp #include <string.h>
 41 13b2bc37 2022-10-23 stsp #include <syslog.h>
 42 13b2bc37 2022-10-23 stsp #include <unistd.h>
 43 13b2bc37 2022-10-23 stsp 
 44 13b2bc37 2022-10-23 stsp #include "got_error.h"
 45 13b2bc37 2022-10-23 stsp #include "got_path.h"
 46 13b2bc37 2022-10-23 stsp 
 47 13b2bc37 2022-10-23 stsp #include "log.h"
 48 13b2bc37 2022-10-23 stsp #include "gotd.h"
 49 40b85cca 2023-01-03 stsp #include "auth.h"
 50 40b85cca 2023-01-03 stsp #include "listen.h"
 51 13b2bc37 2022-10-23 stsp 
 52 13b2bc37 2022-10-23 stsp TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
 53 13b2bc37 2022-10-23 stsp static struct file {
 54 13b2bc37 2022-10-23 stsp 	TAILQ_ENTRY(file)	 entry;
 55 13b2bc37 2022-10-23 stsp 	FILE			*stream;
 56 13b2bc37 2022-10-23 stsp 	char			*name;
 57 13b2bc37 2022-10-23 stsp 	int			 lineno;
 58 13b2bc37 2022-10-23 stsp 	int			 errors;
 59 13b2bc37 2022-10-23 stsp } *file;
 60 13b2bc37 2022-10-23 stsp struct file	*newfile(const char *, int);
 61 13b2bc37 2022-10-23 stsp static void	 closefile(struct file *);
 62 13b2bc37 2022-10-23 stsp int		 check_file_secrecy(int, const char *);
 63 13b2bc37 2022-10-23 stsp int		 yyparse(void);
 64 13b2bc37 2022-10-23 stsp int		 yylex(void);
 65 13b2bc37 2022-10-23 stsp int		 yyerror(const char *, ...)
 66 13b2bc37 2022-10-23 stsp     __attribute__((__format__ (printf, 1, 2)))
 67 13b2bc37 2022-10-23 stsp     __attribute__((__nonnull__ (1)));
 68 13b2bc37 2022-10-23 stsp int		 kw_cmp(const void *, const void *);
 69 13b2bc37 2022-10-23 stsp int		 lookup(char *);
 70 13b2bc37 2022-10-23 stsp int		 lgetc(int);
 71 13b2bc37 2022-10-23 stsp int		 lungetc(int);
 72 13b2bc37 2022-10-23 stsp int		 findeol(void);
 73 13b2bc37 2022-10-23 stsp 
 74 13b2bc37 2022-10-23 stsp TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
 75 13b2bc37 2022-10-23 stsp struct sym {
 76 13b2bc37 2022-10-23 stsp 	TAILQ_ENTRY(sym)	 entry;
 77 13b2bc37 2022-10-23 stsp 	int			 used;
 78 13b2bc37 2022-10-23 stsp 	int			 persist;
 79 13b2bc37 2022-10-23 stsp 	char			*nam;
 80 13b2bc37 2022-10-23 stsp 	char			*val;
 81 13b2bc37 2022-10-23 stsp };
 82 13b2bc37 2022-10-23 stsp 
 83 13b2bc37 2022-10-23 stsp int	 symset(const char *, const char *, int);
 84 13b2bc37 2022-10-23 stsp char	*symget(const char *);
 85 13b2bc37 2022-10-23 stsp 
 86 13b2bc37 2022-10-23 stsp static int		 errors;
 87 13b2bc37 2022-10-23 stsp 
 88 13b2bc37 2022-10-23 stsp static struct gotd		*gotd;
 89 13b2bc37 2022-10-23 stsp static struct gotd_repo		*new_repo;
 90 fc89c900 2023-01-03 op static int			 conf_limit_user_connections(const char *, int);
 91 13b2bc37 2022-10-23 stsp static struct gotd_repo		*conf_new_repo(const char *);
 92 533abaaa 2022-11-18 op static void			 conf_new_access_rule(struct gotd_repo *,
 93 533abaaa 2022-11-18 op 				    enum gotd_access, int, char *);
 94 13b2bc37 2022-10-23 stsp static enum gotd_procid		 gotd_proc_id;
 95 13b2bc37 2022-10-23 stsp 
 96 13b2bc37 2022-10-23 stsp typedef struct {
 97 13b2bc37 2022-10-23 stsp 	union {
 98 13b2bc37 2022-10-23 stsp 		long long	 number;
 99 13b2bc37 2022-10-23 stsp 		char		*string;
100 40b85cca 2023-01-03 stsp 		struct timeval	 tv;
101 13b2bc37 2022-10-23 stsp 	} v;
102 13b2bc37 2022-10-23 stsp 	int lineno;
103 13b2bc37 2022-10-23 stsp } YYSTYPE;
104 13b2bc37 2022-10-23 stsp 
105 13b2bc37 2022-10-23 stsp %}
106 13b2bc37 2022-10-23 stsp 
107 83577462 2023-01-05 stsp %token	PATH ERROR LISTEN ON USER REPOSITORY PERMIT DENY
108 40b85cca 2023-01-03 stsp %token	RO RW CONNECTION LIMIT REQUEST TIMEOUT
109 13b2bc37 2022-10-23 stsp 
110 13b2bc37 2022-10-23 stsp %token	<v.string>	STRING
111 13b2bc37 2022-10-23 stsp %token	<v.number>	NUMBER
112 13b2bc37 2022-10-23 stsp %type	<v.number>	boolean
113 40b85cca 2023-01-03 stsp %type	<v.tv>		timeout
114 13b2bc37 2022-10-23 stsp 
115 13b2bc37 2022-10-23 stsp %%
116 13b2bc37 2022-10-23 stsp 
117 13b2bc37 2022-10-23 stsp grammar		:
118 13b2bc37 2022-10-23 stsp 		| grammar '\n'
119 13b2bc37 2022-10-23 stsp 		| grammar main '\n'
120 13b2bc37 2022-10-23 stsp 		| grammar repository '\n'
121 13b2bc37 2022-10-23 stsp 		;
122 13b2bc37 2022-10-23 stsp 
123 13b2bc37 2022-10-23 stsp boolean		: STRING {
124 13b2bc37 2022-10-23 stsp 			if (strcasecmp($1, "1") == 0 ||
125 13b2bc37 2022-10-23 stsp 			    strcasecmp($1, "yes") == 0 ||
126 13b2bc37 2022-10-23 stsp 			    strcasecmp($1, "on") == 0)
127 13b2bc37 2022-10-23 stsp 				$$ = 1;
128 13b2bc37 2022-10-23 stsp 			else if (strcasecmp($1, "0") == 0 ||
129 13b2bc37 2022-10-23 stsp 			    strcasecmp($1, "off") == 0 ||
130 13b2bc37 2022-10-23 stsp 			    strcasecmp($1, "no") == 0)
131 13b2bc37 2022-10-23 stsp 				$$ = 0;
132 13b2bc37 2022-10-23 stsp 			else {
133 13b2bc37 2022-10-23 stsp 				yyerror("invalid boolean value '%s'", $1);
134 13b2bc37 2022-10-23 stsp 				free($1);
135 13b2bc37 2022-10-23 stsp 				YYERROR;
136 13b2bc37 2022-10-23 stsp 			}
137 13b2bc37 2022-10-23 stsp 			free($1);
138 13b2bc37 2022-10-23 stsp 		}
139 13b2bc37 2022-10-23 stsp 		| ON { $$ = 1; }
140 13b2bc37 2022-10-23 stsp 		| NUMBER { $$ = $1; }
141 13b2bc37 2022-10-23 stsp 		;
142 13b2bc37 2022-10-23 stsp 
143 40b85cca 2023-01-03 stsp timeout		: NUMBER {
144 40b85cca 2023-01-03 stsp 			if ($1 < 0) {
145 40b85cca 2023-01-03 stsp 				yyerror("invalid timeout: %lld", $1);
146 40b85cca 2023-01-03 stsp 				YYERROR;
147 40b85cca 2023-01-03 stsp 			}
148 40b85cca 2023-01-03 stsp 			$$.tv_sec = $1;
149 40b85cca 2023-01-03 stsp 			$$.tv_usec = 0;
150 40b85cca 2023-01-03 stsp 		}
151 2be11cde 2023-01-03 op 		| STRING {
152 2be11cde 2023-01-03 op 			const char	*errstr;
153 2be11cde 2023-01-03 op 			const char	*type = "seconds";
154 2be11cde 2023-01-03 op 			size_t		 len;
155 2be11cde 2023-01-03 op 			int		 mul = 1;
156 2be11cde 2023-01-03 op 
157 2be11cde 2023-01-03 op 			if (*$1 == '\0') {
158 2be11cde 2023-01-03 op 				yyerror("invalid number of seconds: %s", $1);
159 2be11cde 2023-01-03 op 				free($1);
160 2be11cde 2023-01-03 op 				YYERROR;
161 2be11cde 2023-01-03 op 			}
162 2be11cde 2023-01-03 op 
163 2be11cde 2023-01-03 op 			len = strlen($1);
164 2be11cde 2023-01-03 op 			switch ($1[len - 1]) {
165 2be11cde 2023-01-03 op 			case 'S':
166 2be11cde 2023-01-03 op 			case 's':
167 2be11cde 2023-01-03 op 				$1[len - 1] = '\0';
168 2be11cde 2023-01-03 op 				break;
169 2be11cde 2023-01-03 op 			case 'M':
170 2be11cde 2023-01-03 op 			case 'm':
171 2be11cde 2023-01-03 op 				type = "minutes";
172 2be11cde 2023-01-03 op 				mul = 60;
173 2be11cde 2023-01-03 op 				$1[len - 1] = '\0';
174 2be11cde 2023-01-03 op 				break;
175 2be11cde 2023-01-03 op 			case 'H':
176 2be11cde 2023-01-03 op 			case 'h':
177 2be11cde 2023-01-03 op 				type = "hours";
178 2be11cde 2023-01-03 op 				mul = 60 * 60;
179 2be11cde 2023-01-03 op 				$1[len - 1] = '\0';
180 2be11cde 2023-01-03 op 				break;
181 2be11cde 2023-01-03 op 			}
182 2be11cde 2023-01-03 op 
183 2be11cde 2023-01-03 op 			$$.tv_usec = 0;
184 71cd355c 2023-01-03 op 			$$.tv_sec = strtonum($1, 0, INT_MAX / mul, &errstr);
185 2be11cde 2023-01-03 op 			if (errstr) {
186 2be11cde 2023-01-03 op 				yyerror("number of %s is %s: %s", type,
187 2be11cde 2023-01-03 op 				    errstr, $1);
188 2be11cde 2023-01-03 op 				free($1);
189 2be11cde 2023-01-03 op 				YYERROR;
190 2be11cde 2023-01-03 op 			}
191 2be11cde 2023-01-03 op 
192 2be11cde 2023-01-03 op 			$$.tv_sec *= mul;
193 2be11cde 2023-01-03 op 			free($1);
194 2be11cde 2023-01-03 op 		}
195 40b85cca 2023-01-03 stsp 		;
196 40b85cca 2023-01-03 stsp 
197 83577462 2023-01-05 stsp main		: LISTEN ON STRING {
198 abe844e2 2023-01-18 op 			if (!got_path_is_absolute($3))
199 abe844e2 2023-01-18 op 				yyerror("bad unix socket path \"%s\": "
200 abe844e2 2023-01-18 op 				    "must be an absolute path", $3);
201 abe844e2 2023-01-18 op 
202 d93ecf7d 2022-12-14 stsp 			if (gotd_proc_id == PROC_LISTEN) {
203 83577462 2023-01-05 stsp 				if (strlcpy(gotd->unix_socket_path, $3,
204 13b2bc37 2022-10-23 stsp 				    sizeof(gotd->unix_socket_path)) >=
205 13b2bc37 2022-10-23 stsp 				    sizeof(gotd->unix_socket_path)) {
206 13b2bc37 2022-10-23 stsp 					yyerror("%s: unix socket path too long",
207 13b2bc37 2022-10-23 stsp 					    __func__);
208 83577462 2023-01-05 stsp 					free($3);
209 13b2bc37 2022-10-23 stsp 					YYERROR;
210 13b2bc37 2022-10-23 stsp 				}
211 13b2bc37 2022-10-23 stsp 			}
212 83577462 2023-01-05 stsp 			free($3);
213 13b2bc37 2022-10-23 stsp 		}
214 13b2bc37 2022-10-23 stsp 		| USER STRING {
215 13b2bc37 2022-10-23 stsp 			if (strlcpy(gotd->user_name, $2,
216 13b2bc37 2022-10-23 stsp 			    sizeof(gotd->user_name)) >=
217 13b2bc37 2022-10-23 stsp 			    sizeof(gotd->user_name)) {
218 13b2bc37 2022-10-23 stsp 				yyerror("%s: user name too long", __func__);
219 13b2bc37 2022-10-23 stsp 				free($2);
220 13b2bc37 2022-10-23 stsp 				YYERROR;
221 13b2bc37 2022-10-23 stsp 			}
222 13b2bc37 2022-10-23 stsp 			free($2);
223 13b2bc37 2022-10-23 stsp 		}
224 40b85cca 2023-01-03 stsp 		| connection
225 13b2bc37 2022-10-23 stsp 		;
226 13b2bc37 2022-10-23 stsp 
227 40b85cca 2023-01-03 stsp connection	: CONNECTION '{' optnl conflags_l '}'
228 40b85cca 2023-01-03 stsp 		| CONNECTION conflags
229 40b85cca 2023-01-03 stsp 
230 40b85cca 2023-01-03 stsp conflags_l	: conflags optnl conflags_l
231 40b85cca 2023-01-03 stsp 		| conflags optnl
232 40b85cca 2023-01-03 stsp 		;
233 40b85cca 2023-01-03 stsp 
234 40b85cca 2023-01-03 stsp conflags	: REQUEST TIMEOUT timeout		{
235 46e48ac7 2023-01-03 stsp 			if ($3.tv_sec <= 0) {
236 46e48ac7 2023-01-03 stsp 				yyerror("invalid timeout: %lld", $3.tv_sec);
237 46e48ac7 2023-01-03 stsp 				YYERROR;
238 46e48ac7 2023-01-03 stsp 			}
239 40b85cca 2023-01-03 stsp 			memcpy(&gotd->request_timeout, &$3,
240 40b85cca 2023-01-03 stsp 			    sizeof(gotd->request_timeout));
241 40b85cca 2023-01-03 stsp 		}
242 40b85cca 2023-01-03 stsp 		| LIMIT USER STRING NUMBER	{
243 40b85cca 2023-01-03 stsp 			if (gotd_proc_id == PROC_LISTEN &&
244 40b85cca 2023-01-03 stsp 			    conf_limit_user_connections($3, $4) == -1) {
245 40b85cca 2023-01-03 stsp 				free($3);
246 40b85cca 2023-01-03 stsp 				YYERROR;
247 40b85cca 2023-01-03 stsp 			}
248 40b85cca 2023-01-03 stsp 			free($3);
249 40b85cca 2023-01-03 stsp 		}
250 40b85cca 2023-01-03 stsp 		;
251 40b85cca 2023-01-03 stsp 
252 13b2bc37 2022-10-23 stsp repository	: REPOSITORY STRING {
253 13b2bc37 2022-10-23 stsp 			struct gotd_repo *repo;
254 13b2bc37 2022-10-23 stsp 
255 13b2bc37 2022-10-23 stsp 			TAILQ_FOREACH(repo, &gotd->repos, entry) {
256 13b2bc37 2022-10-23 stsp 				if (strcmp(repo->name, $2) == 0) {
257 13b2bc37 2022-10-23 stsp 					yyerror("duplicate repository '%s'", $2);
258 13b2bc37 2022-10-23 stsp 					free($2);
259 13b2bc37 2022-10-23 stsp 					YYERROR;
260 13b2bc37 2022-10-23 stsp 				}
261 13b2bc37 2022-10-23 stsp 			}
262 13b2bc37 2022-10-23 stsp 
263 5e25db14 2022-12-29 stsp 			if (gotd_proc_id == PROC_GOTD ||
264 5e25db14 2022-12-29 stsp 			    gotd_proc_id == PROC_AUTH) {
265 13b2bc37 2022-10-23 stsp 				new_repo = conf_new_repo($2);
266 13b2bc37 2022-10-23 stsp 			}
267 13b2bc37 2022-10-23 stsp 			free($2);
268 13b2bc37 2022-10-23 stsp 		} '{' optnl repoopts2 '}' {
269 13b2bc37 2022-10-23 stsp 		}
270 13b2bc37 2022-10-23 stsp 		;
271 13b2bc37 2022-10-23 stsp 
272 13b2bc37 2022-10-23 stsp repoopts1	: PATH STRING {
273 5e25db14 2022-12-29 stsp 			if (gotd_proc_id == PROC_GOTD ||
274 5e25db14 2022-12-29 stsp 			    gotd_proc_id == PROC_AUTH) {
275 13b2bc37 2022-10-23 stsp 				if (!got_path_is_absolute($2)) {
276 13b2bc37 2022-10-23 stsp 					yyerror("%s: path %s is not absolute",
277 13b2bc37 2022-10-23 stsp 					    __func__, $2);
278 13b2bc37 2022-10-23 stsp 					free($2);
279 13b2bc37 2022-10-23 stsp 					YYERROR;
280 13b2bc37 2022-10-23 stsp 				}
281 9b7f22a6 2023-01-08 stsp 				if (realpath($2, new_repo->path) == NULL) {
282 9b7f22a6 2023-01-08 stsp 					yyerror("realpath %s: %s", $2, strerror(errno));
283 13b2bc37 2022-10-23 stsp 					free($2);
284 13b2bc37 2022-10-23 stsp 					YYERROR;
285 13b2bc37 2022-10-23 stsp 				}
286 13b2bc37 2022-10-23 stsp 			}
287 13b2bc37 2022-10-23 stsp 			free($2);
288 0ccf3acb 2022-11-16 stsp 		}
289 0ccf3acb 2022-11-16 stsp 		| PERMIT RO STRING {
290 5e25db14 2022-12-29 stsp 			if (gotd_proc_id == PROC_AUTH) {
291 0ccf3acb 2022-11-16 stsp 				conf_new_access_rule(new_repo,
292 0ccf3acb 2022-11-16 stsp 				    GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
293 0ccf3acb 2022-11-16 stsp 			}
294 0ccf3acb 2022-11-16 stsp 		}
295 0ccf3acb 2022-11-16 stsp 		| PERMIT RW STRING {
296 5e25db14 2022-12-29 stsp 			if (gotd_proc_id == PROC_AUTH) {
297 0ccf3acb 2022-11-16 stsp 				conf_new_access_rule(new_repo,
298 0ccf3acb 2022-11-16 stsp 				    GOTD_ACCESS_PERMITTED,
299 0ccf3acb 2022-11-16 stsp 				    GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
300 0ccf3acb 2022-11-16 stsp 			}
301 13b2bc37 2022-10-23 stsp 		}
302 0ccf3acb 2022-11-16 stsp 		| DENY STRING {
303 5e25db14 2022-12-29 stsp 			if (gotd_proc_id == PROC_AUTH) {
304 0ccf3acb 2022-11-16 stsp 				conf_new_access_rule(new_repo,
305 0ccf3acb 2022-11-16 stsp 				    GOTD_ACCESS_DENIED, 0, $2);
306 0ccf3acb 2022-11-16 stsp 			}
307 0ccf3acb 2022-11-16 stsp 		}
308 13b2bc37 2022-10-23 stsp 		;
309 13b2bc37 2022-10-23 stsp 
310 13b2bc37 2022-10-23 stsp repoopts2	: repoopts2 repoopts1 nl
311 13b2bc37 2022-10-23 stsp 		| repoopts1 optnl
312 13b2bc37 2022-10-23 stsp 		;
313 13b2bc37 2022-10-23 stsp 
314 13b2bc37 2022-10-23 stsp nl		: '\n' optnl
315 13b2bc37 2022-10-23 stsp 		;
316 13b2bc37 2022-10-23 stsp 
317 13b2bc37 2022-10-23 stsp optnl		: '\n' optnl		/* zero or more newlines */
318 13b2bc37 2022-10-23 stsp 		| /* empty */
319 13b2bc37 2022-10-23 stsp 		;
320 13b2bc37 2022-10-23 stsp 
321 13b2bc37 2022-10-23 stsp %%
322 13b2bc37 2022-10-23 stsp 
323 13b2bc37 2022-10-23 stsp struct keywords {
324 13b2bc37 2022-10-23 stsp 	const char	*k_name;
325 13b2bc37 2022-10-23 stsp 	int		 k_val;
326 13b2bc37 2022-10-23 stsp };
327 13b2bc37 2022-10-23 stsp 
328 13b2bc37 2022-10-23 stsp int
329 13b2bc37 2022-10-23 stsp yyerror(const char *fmt, ...)
330 13b2bc37 2022-10-23 stsp {
331 13b2bc37 2022-10-23 stsp 	va_list ap;
332 13b2bc37 2022-10-23 stsp 	char *msg;
333 13b2bc37 2022-10-23 stsp 
334 13b2bc37 2022-10-23 stsp 	file->errors++;
335 13b2bc37 2022-10-23 stsp 	va_start(ap, fmt);
336 13b2bc37 2022-10-23 stsp 	if (vasprintf(&msg, fmt, ap) == -1)
337 13b2bc37 2022-10-23 stsp 		fatalx("yyerror vasprintf");
338 13b2bc37 2022-10-23 stsp 	va_end(ap);
339 13b2bc37 2022-10-23 stsp 	logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
340 13b2bc37 2022-10-23 stsp 	free(msg);
341 13b2bc37 2022-10-23 stsp 	return (0);
342 13b2bc37 2022-10-23 stsp }
343 13b2bc37 2022-10-23 stsp 
344 13b2bc37 2022-10-23 stsp int
345 13b2bc37 2022-10-23 stsp kw_cmp(const void *k, const void *e)
346 13b2bc37 2022-10-23 stsp {
347 13b2bc37 2022-10-23 stsp 	return (strcmp(k, ((const struct keywords *)e)->k_name));
348 13b2bc37 2022-10-23 stsp }
349 13b2bc37 2022-10-23 stsp 
350 13b2bc37 2022-10-23 stsp int
351 13b2bc37 2022-10-23 stsp lookup(char *s)
352 13b2bc37 2022-10-23 stsp {
353 13b2bc37 2022-10-23 stsp 	/* This has to be sorted always. */
354 13b2bc37 2022-10-23 stsp 	static const struct keywords keywords[] = {
355 40b85cca 2023-01-03 stsp 		{ "connection",			CONNECTION },
356 0ccf3acb 2022-11-16 stsp 		{ "deny",			DENY },
357 40b85cca 2023-01-03 stsp 		{ "limit",			LIMIT },
358 83577462 2023-01-05 stsp 		{ "listen",			LISTEN },
359 13b2bc37 2022-10-23 stsp 		{ "on",				ON },
360 13b2bc37 2022-10-23 stsp 		{ "path",			PATH },
361 0ccf3acb 2022-11-16 stsp 		{ "permit",			PERMIT },
362 13b2bc37 2022-10-23 stsp 		{ "repository",			REPOSITORY },
363 40b85cca 2023-01-03 stsp 		{ "request",			REQUEST },
364 0ccf3acb 2022-11-16 stsp 		{ "ro",				RO },
365 0ccf3acb 2022-11-16 stsp 		{ "rw",				RW },
366 40b85cca 2023-01-03 stsp 		{ "timeout",			TIMEOUT },
367 13b2bc37 2022-10-23 stsp 		{ "user",			USER },
368 13b2bc37 2022-10-23 stsp 	};
369 13b2bc37 2022-10-23 stsp 	const struct keywords *p;
370 13b2bc37 2022-10-23 stsp 
371 13b2bc37 2022-10-23 stsp 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
372 13b2bc37 2022-10-23 stsp 	    sizeof(keywords[0]), kw_cmp);
373 13b2bc37 2022-10-23 stsp 
374 13b2bc37 2022-10-23 stsp 	if (p)
375 13b2bc37 2022-10-23 stsp 		return (p->k_val);
376 13b2bc37 2022-10-23 stsp 	else
377 13b2bc37 2022-10-23 stsp 		return (STRING);
378 13b2bc37 2022-10-23 stsp }
379 13b2bc37 2022-10-23 stsp 
380 13b2bc37 2022-10-23 stsp #define MAXPUSHBACK	128
381 13b2bc37 2022-10-23 stsp 
382 13b2bc37 2022-10-23 stsp unsigned char *parsebuf;
383 13b2bc37 2022-10-23 stsp int parseindex;
384 13b2bc37 2022-10-23 stsp unsigned char pushback_buffer[MAXPUSHBACK];
385 13b2bc37 2022-10-23 stsp int pushback_index = 0;
386 13b2bc37 2022-10-23 stsp 
387 13b2bc37 2022-10-23 stsp int
388 13b2bc37 2022-10-23 stsp lgetc(int quotec)
389 13b2bc37 2022-10-23 stsp {
390 13b2bc37 2022-10-23 stsp 	int c, next;
391 13b2bc37 2022-10-23 stsp 
392 13b2bc37 2022-10-23 stsp 	if (parsebuf) {
393 13b2bc37 2022-10-23 stsp 		/* Read character from the parsebuffer instead of input. */
394 13b2bc37 2022-10-23 stsp 		if (parseindex >= 0) {
395 13b2bc37 2022-10-23 stsp 			c = parsebuf[parseindex++];
396 13b2bc37 2022-10-23 stsp 			if (c != '\0')
397 13b2bc37 2022-10-23 stsp 				return (c);
398 13b2bc37 2022-10-23 stsp 			parsebuf = NULL;
399 13b2bc37 2022-10-23 stsp 		} else
400 13b2bc37 2022-10-23 stsp 			parseindex++;
401 13b2bc37 2022-10-23 stsp 	}
402 13b2bc37 2022-10-23 stsp 
403 13b2bc37 2022-10-23 stsp 	if (pushback_index)
404 13b2bc37 2022-10-23 stsp 		return (pushback_buffer[--pushback_index]);
405 13b2bc37 2022-10-23 stsp 
406 13b2bc37 2022-10-23 stsp 	if (quotec) {
407 13b2bc37 2022-10-23 stsp 		c = getc(file->stream);
408 13b2bc37 2022-10-23 stsp 		if (c == EOF)
409 13b2bc37 2022-10-23 stsp 			yyerror("reached end of file while parsing "
410 13b2bc37 2022-10-23 stsp 			    "quoted string");
411 13b2bc37 2022-10-23 stsp 		return (c);
412 13b2bc37 2022-10-23 stsp 	}
413 13b2bc37 2022-10-23 stsp 
414 13b2bc37 2022-10-23 stsp 	c = getc(file->stream);
415 13b2bc37 2022-10-23 stsp 	while (c == '\\') {
416 13b2bc37 2022-10-23 stsp 		next = getc(file->stream);
417 13b2bc37 2022-10-23 stsp 		if (next != '\n') {
418 13b2bc37 2022-10-23 stsp 			c = next;
419 13b2bc37 2022-10-23 stsp 			break;
420 13b2bc37 2022-10-23 stsp 		}
421 13b2bc37 2022-10-23 stsp 		yylval.lineno = file->lineno;
422 13b2bc37 2022-10-23 stsp 		file->lineno++;
423 13b2bc37 2022-10-23 stsp 		c = getc(file->stream);
424 13b2bc37 2022-10-23 stsp 	}
425 13b2bc37 2022-10-23 stsp 
426 13b2bc37 2022-10-23 stsp 	return (c);
427 13b2bc37 2022-10-23 stsp }
428 13b2bc37 2022-10-23 stsp 
429 13b2bc37 2022-10-23 stsp int
430 13b2bc37 2022-10-23 stsp lungetc(int c)
431 13b2bc37 2022-10-23 stsp {
432 13b2bc37 2022-10-23 stsp 	if (c == EOF)
433 13b2bc37 2022-10-23 stsp 		return (EOF);
434 13b2bc37 2022-10-23 stsp 	if (parsebuf) {
435 13b2bc37 2022-10-23 stsp 		parseindex--;
436 13b2bc37 2022-10-23 stsp 		if (parseindex >= 0)
437 13b2bc37 2022-10-23 stsp 			return (c);
438 13b2bc37 2022-10-23 stsp 	}
439 13b2bc37 2022-10-23 stsp 	if (pushback_index < MAXPUSHBACK-1)
440 13b2bc37 2022-10-23 stsp 		return (pushback_buffer[pushback_index++] = c);
441 13b2bc37 2022-10-23 stsp 	else
442 13b2bc37 2022-10-23 stsp 		return (EOF);
443 13b2bc37 2022-10-23 stsp }
444 13b2bc37 2022-10-23 stsp 
445 13b2bc37 2022-10-23 stsp int
446 13b2bc37 2022-10-23 stsp findeol(void)
447 13b2bc37 2022-10-23 stsp {
448 13b2bc37 2022-10-23 stsp 	int c;
449 13b2bc37 2022-10-23 stsp 
450 13b2bc37 2022-10-23 stsp 	parsebuf = NULL;
451 13b2bc37 2022-10-23 stsp 
452 13b2bc37 2022-10-23 stsp 	/* Skip to either EOF or the first real EOL. */
453 13b2bc37 2022-10-23 stsp 	while (1) {
454 13b2bc37 2022-10-23 stsp 		if (pushback_index)
455 13b2bc37 2022-10-23 stsp 			c = pushback_buffer[--pushback_index];
456 13b2bc37 2022-10-23 stsp 		else
457 13b2bc37 2022-10-23 stsp 			c = lgetc(0);
458 13b2bc37 2022-10-23 stsp 		if (c == '\n') {
459 13b2bc37 2022-10-23 stsp 			file->lineno++;
460 13b2bc37 2022-10-23 stsp 			break;
461 13b2bc37 2022-10-23 stsp 		}
462 13b2bc37 2022-10-23 stsp 		if (c == EOF)
463 13b2bc37 2022-10-23 stsp 			break;
464 13b2bc37 2022-10-23 stsp 	}
465 13b2bc37 2022-10-23 stsp 	return (ERROR);
466 13b2bc37 2022-10-23 stsp }
467 13b2bc37 2022-10-23 stsp 
468 13b2bc37 2022-10-23 stsp int
469 13b2bc37 2022-10-23 stsp yylex(void)
470 13b2bc37 2022-10-23 stsp {
471 13b2bc37 2022-10-23 stsp 	unsigned char buf[8096];
472 13b2bc37 2022-10-23 stsp 	unsigned char *p, *val;
473 13b2bc37 2022-10-23 stsp 	int quotec, next, c;
474 13b2bc37 2022-10-23 stsp 	int token;
475 13b2bc37 2022-10-23 stsp 
476 13b2bc37 2022-10-23 stsp top:
477 13b2bc37 2022-10-23 stsp 	p = buf;
478 13b2bc37 2022-10-23 stsp 	c = lgetc(0);
479 13b2bc37 2022-10-23 stsp 	while (c == ' ' || c == '\t')
480 13b2bc37 2022-10-23 stsp 		c = lgetc(0); /* nothing */
481 13b2bc37 2022-10-23 stsp 
482 13b2bc37 2022-10-23 stsp 	yylval.lineno = file->lineno;
483 13b2bc37 2022-10-23 stsp 	if (c == '#') {
484 13b2bc37 2022-10-23 stsp 		c = lgetc(0);
485 13b2bc37 2022-10-23 stsp 		while (c != '\n' && c != EOF)
486 13b2bc37 2022-10-23 stsp 			c = lgetc(0); /* nothing */
487 13b2bc37 2022-10-23 stsp 	}
488 13b2bc37 2022-10-23 stsp 	if (c == '$' && parsebuf == NULL) {
489 13b2bc37 2022-10-23 stsp 		while (1) {
490 13b2bc37 2022-10-23 stsp 			c = lgetc(0);
491 13b2bc37 2022-10-23 stsp 			if (c == EOF)
492 13b2bc37 2022-10-23 stsp 				return (0);
493 13b2bc37 2022-10-23 stsp 
494 13b2bc37 2022-10-23 stsp 			if (p + 1 >= buf + sizeof(buf) - 1) {
495 13b2bc37 2022-10-23 stsp 				yyerror("string too long");
496 13b2bc37 2022-10-23 stsp 				return (findeol());
497 13b2bc37 2022-10-23 stsp 			}
498 13b2bc37 2022-10-23 stsp 			if (isalnum(c) || c == '_') {
499 13b2bc37 2022-10-23 stsp 				*p++ = c;
500 13b2bc37 2022-10-23 stsp 				continue;
501 13b2bc37 2022-10-23 stsp 			}
502 13b2bc37 2022-10-23 stsp 			*p = '\0';
503 13b2bc37 2022-10-23 stsp 			lungetc(c);
504 13b2bc37 2022-10-23 stsp 			break;
505 13b2bc37 2022-10-23 stsp 		}
506 13b2bc37 2022-10-23 stsp 		val = symget(buf);
507 13b2bc37 2022-10-23 stsp 		if (val == NULL) {
508 13b2bc37 2022-10-23 stsp 			yyerror("macro '%s' not defined", buf);
509 13b2bc37 2022-10-23 stsp 			return (findeol());
510 13b2bc37 2022-10-23 stsp 		}
511 13b2bc37 2022-10-23 stsp 		parsebuf = val;
512 13b2bc37 2022-10-23 stsp 		parseindex = 0;
513 13b2bc37 2022-10-23 stsp 		goto top;
514 13b2bc37 2022-10-23 stsp 	}
515 13b2bc37 2022-10-23 stsp 
516 13b2bc37 2022-10-23 stsp 	switch (c) {
517 13b2bc37 2022-10-23 stsp 	case '\'':
518 13b2bc37 2022-10-23 stsp 	case '"':
519 13b2bc37 2022-10-23 stsp 		quotec = c;
520 13b2bc37 2022-10-23 stsp 		while (1) {
521 13b2bc37 2022-10-23 stsp 			c = lgetc(quotec);
522 13b2bc37 2022-10-23 stsp 			if (c == EOF)
523 13b2bc37 2022-10-23 stsp 				return (0);
524 13b2bc37 2022-10-23 stsp 			if (c == '\n') {
525 13b2bc37 2022-10-23 stsp 				file->lineno++;
526 13b2bc37 2022-10-23 stsp 				continue;
527 13b2bc37 2022-10-23 stsp 			} else if (c == '\\') {
528 13b2bc37 2022-10-23 stsp 				next = lgetc(quotec);
529 13b2bc37 2022-10-23 stsp 				if (next == EOF)
530 13b2bc37 2022-10-23 stsp 					return (0);
531 13b2bc37 2022-10-23 stsp 				if (next == quotec || c == ' ' || c == '\t')
532 13b2bc37 2022-10-23 stsp 					c = next;
533 13b2bc37 2022-10-23 stsp 				else if (next == '\n') {
534 13b2bc37 2022-10-23 stsp 					file->lineno++;
535 13b2bc37 2022-10-23 stsp 					continue;
536 13b2bc37 2022-10-23 stsp 				} else
537 13b2bc37 2022-10-23 stsp 					lungetc(next);
538 13b2bc37 2022-10-23 stsp 			} else if (c == quotec) {
539 13b2bc37 2022-10-23 stsp 				*p = '\0';
540 13b2bc37 2022-10-23 stsp 				break;
541 13b2bc37 2022-10-23 stsp 			} else if (c == '\0') {
542 13b2bc37 2022-10-23 stsp 				yyerror("syntax error");
543 13b2bc37 2022-10-23 stsp 				return (findeol());
544 13b2bc37 2022-10-23 stsp 			}
545 13b2bc37 2022-10-23 stsp 			if (p + 1 >= buf + sizeof(buf) - 1) {
546 13b2bc37 2022-10-23 stsp 				yyerror("string too long");
547 13b2bc37 2022-10-23 stsp 				return (findeol());
548 13b2bc37 2022-10-23 stsp 			}
549 13b2bc37 2022-10-23 stsp 			*p++ = c;
550 13b2bc37 2022-10-23 stsp 		}
551 13b2bc37 2022-10-23 stsp 		yylval.v.string = strdup(buf);
552 13b2bc37 2022-10-23 stsp 		if (yylval.v.string == NULL)
553 13b2bc37 2022-10-23 stsp 			err(1, "yylex: strdup");
554 13b2bc37 2022-10-23 stsp 		return (STRING);
555 13b2bc37 2022-10-23 stsp 	}
556 13b2bc37 2022-10-23 stsp 
557 13b2bc37 2022-10-23 stsp #define allowed_to_end_number(x) \
558 13b2bc37 2022-10-23 stsp 	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
559 13b2bc37 2022-10-23 stsp 
560 13b2bc37 2022-10-23 stsp 	if (c == '-' || isdigit(c)) {
561 13b2bc37 2022-10-23 stsp 		do {
562 13b2bc37 2022-10-23 stsp 			*p++ = c;
563 13b2bc37 2022-10-23 stsp 			if ((unsigned)(p-buf) >= sizeof(buf)) {
564 13b2bc37 2022-10-23 stsp 				yyerror("string too long");
565 13b2bc37 2022-10-23 stsp 				return (findeol());
566 13b2bc37 2022-10-23 stsp 			}
567 13b2bc37 2022-10-23 stsp 			c = lgetc(0);
568 13b2bc37 2022-10-23 stsp 		} while (c != EOF && isdigit(c));
569 13b2bc37 2022-10-23 stsp 		lungetc(c);
570 13b2bc37 2022-10-23 stsp 		if (p == buf + 1 && buf[0] == '-')
571 13b2bc37 2022-10-23 stsp 			goto nodigits;
572 13b2bc37 2022-10-23 stsp 		if (c == EOF || allowed_to_end_number(c)) {
573 13b2bc37 2022-10-23 stsp 			const char *errstr = NULL;
574 13b2bc37 2022-10-23 stsp 
575 13b2bc37 2022-10-23 stsp 			*p = '\0';
576 13b2bc37 2022-10-23 stsp 			yylval.v.number = strtonum(buf, LLONG_MIN,
577 13b2bc37 2022-10-23 stsp 			    LLONG_MAX, &errstr);
578 13b2bc37 2022-10-23 stsp 			if (errstr) {
579 13b2bc37 2022-10-23 stsp 				yyerror("\"%s\" invalid number: %s",
580 13b2bc37 2022-10-23 stsp 				    buf, errstr);
581 13b2bc37 2022-10-23 stsp 				return (findeol());
582 13b2bc37 2022-10-23 stsp 			}
583 13b2bc37 2022-10-23 stsp 			return (NUMBER);
584 13b2bc37 2022-10-23 stsp 		} else {
585 13b2bc37 2022-10-23 stsp nodigits:
586 13b2bc37 2022-10-23 stsp 			while (p > buf + 1)
587 13b2bc37 2022-10-23 stsp 				lungetc(*--p);
588 13b2bc37 2022-10-23 stsp 			c = *--p;
589 13b2bc37 2022-10-23 stsp 			if (c == '-')
590 13b2bc37 2022-10-23 stsp 				return (c);
591 13b2bc37 2022-10-23 stsp 		}
592 13b2bc37 2022-10-23 stsp 	}
593 13b2bc37 2022-10-23 stsp 
594 13b2bc37 2022-10-23 stsp #define allowed_in_string(x) \
595 13b2bc37 2022-10-23 stsp 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
596 13b2bc37 2022-10-23 stsp 	x != '{' && x != '}' && \
597 13b2bc37 2022-10-23 stsp 	x != '!' && x != '=' && x != '#' && \
598 13b2bc37 2022-10-23 stsp 	x != ','))
599 13b2bc37 2022-10-23 stsp 
600 13b2bc37 2022-10-23 stsp 	if (isalnum(c) || c == ':' || c == '_') {
601 13b2bc37 2022-10-23 stsp 		do {
602 13b2bc37 2022-10-23 stsp 			*p++ = c;
603 13b2bc37 2022-10-23 stsp 			if ((unsigned)(p-buf) >= sizeof(buf)) {
604 13b2bc37 2022-10-23 stsp 				yyerror("string too long");
605 13b2bc37 2022-10-23 stsp 				return (findeol());
606 13b2bc37 2022-10-23 stsp 			}
607 13b2bc37 2022-10-23 stsp 			c = lgetc(0);
608 13b2bc37 2022-10-23 stsp 		} while (c != EOF && (allowed_in_string(c)));
609 13b2bc37 2022-10-23 stsp 		lungetc(c);
610 13b2bc37 2022-10-23 stsp 		*p = '\0';
611 13b2bc37 2022-10-23 stsp 		token = lookup(buf);
612 13b2bc37 2022-10-23 stsp 		if (token == STRING) {
613 13b2bc37 2022-10-23 stsp 			yylval.v.string = strdup(buf);
614 13b2bc37 2022-10-23 stsp 			if (yylval.v.string == NULL)
615 13b2bc37 2022-10-23 stsp 				err(1, "yylex: strdup");
616 13b2bc37 2022-10-23 stsp 		}
617 13b2bc37 2022-10-23 stsp 		return (token);
618 13b2bc37 2022-10-23 stsp 	}
619 13b2bc37 2022-10-23 stsp 	if (c == '\n') {
620 13b2bc37 2022-10-23 stsp 		yylval.lineno = file->lineno;
621 13b2bc37 2022-10-23 stsp 		file->lineno++;
622 13b2bc37 2022-10-23 stsp 	}
623 13b2bc37 2022-10-23 stsp 	if (c == EOF)
624 13b2bc37 2022-10-23 stsp 		return (0);
625 13b2bc37 2022-10-23 stsp 	return (c);
626 13b2bc37 2022-10-23 stsp }
627 13b2bc37 2022-10-23 stsp 
628 13b2bc37 2022-10-23 stsp int
629 13b2bc37 2022-10-23 stsp check_file_secrecy(int fd, const char *fname)
630 13b2bc37 2022-10-23 stsp {
631 13b2bc37 2022-10-23 stsp 	struct stat st;
632 13b2bc37 2022-10-23 stsp 
633 13b2bc37 2022-10-23 stsp 	if (fstat(fd, &st)) {
634 13b2bc37 2022-10-23 stsp 		log_warn("cannot stat %s", fname);
635 13b2bc37 2022-10-23 stsp 		return (-1);
636 13b2bc37 2022-10-23 stsp 	}
637 13b2bc37 2022-10-23 stsp 	if (st.st_uid != 0 && st.st_uid != getuid()) {
638 13b2bc37 2022-10-23 stsp 		log_warnx("%s: owner not root or current user", fname);
639 13b2bc37 2022-10-23 stsp 		return (-1);
640 13b2bc37 2022-10-23 stsp 	}
641 13b2bc37 2022-10-23 stsp 	if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
642 13b2bc37 2022-10-23 stsp 		log_warnx("%s: group writable or world read/writable", fname);
643 13b2bc37 2022-10-23 stsp 		return (-1);
644 13b2bc37 2022-10-23 stsp 	}
645 13b2bc37 2022-10-23 stsp 	return (0);
646 13b2bc37 2022-10-23 stsp }
647 13b2bc37 2022-10-23 stsp 
648 13b2bc37 2022-10-23 stsp struct file *
649 13b2bc37 2022-10-23 stsp newfile(const char *name, int secret)
650 13b2bc37 2022-10-23 stsp {
651 13b2bc37 2022-10-23 stsp 	struct file *nfile;
652 13b2bc37 2022-10-23 stsp 
653 13b2bc37 2022-10-23 stsp 	nfile = calloc(1, sizeof(struct file));
654 13b2bc37 2022-10-23 stsp 	if (nfile == NULL) {
655 13b2bc37 2022-10-23 stsp 		log_warn("calloc");
656 13b2bc37 2022-10-23 stsp 		return (NULL);
657 13b2bc37 2022-10-23 stsp 	}
658 13b2bc37 2022-10-23 stsp 	nfile->name = strdup(name);
659 13b2bc37 2022-10-23 stsp 	if (nfile->name == NULL) {
660 13b2bc37 2022-10-23 stsp 		log_warn("strdup");
661 13b2bc37 2022-10-23 stsp 		free(nfile);
662 13b2bc37 2022-10-23 stsp 		return (NULL);
663 13b2bc37 2022-10-23 stsp 	}
664 13b2bc37 2022-10-23 stsp 	nfile->stream = fopen(nfile->name, "r");
665 13b2bc37 2022-10-23 stsp 	if (nfile->stream == NULL) {
666 13b2bc37 2022-10-23 stsp 		/* no warning, we don't require a conf file */
667 13b2bc37 2022-10-23 stsp 		free(nfile->name);
668 13b2bc37 2022-10-23 stsp 		free(nfile);
669 13b2bc37 2022-10-23 stsp 		return (NULL);
670 13b2bc37 2022-10-23 stsp 	} else if (secret &&
671 13b2bc37 2022-10-23 stsp 	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
672 13b2bc37 2022-10-23 stsp 		fclose(nfile->stream);
673 13b2bc37 2022-10-23 stsp 		free(nfile->name);
674 13b2bc37 2022-10-23 stsp 		free(nfile);
675 13b2bc37 2022-10-23 stsp 		return (NULL);
676 13b2bc37 2022-10-23 stsp 	}
677 13b2bc37 2022-10-23 stsp 	nfile->lineno = 1;
678 13b2bc37 2022-10-23 stsp 	return (nfile);
679 13b2bc37 2022-10-23 stsp }
680 13b2bc37 2022-10-23 stsp 
681 13b2bc37 2022-10-23 stsp static void
682 13b2bc37 2022-10-23 stsp closefile(struct file *xfile)
683 13b2bc37 2022-10-23 stsp {
684 13b2bc37 2022-10-23 stsp 	fclose(xfile->stream);
685 13b2bc37 2022-10-23 stsp 	free(xfile->name);
686 13b2bc37 2022-10-23 stsp 	free(xfile);
687 13b2bc37 2022-10-23 stsp }
688 13b2bc37 2022-10-23 stsp 
689 13b2bc37 2022-10-23 stsp int
690 13b2bc37 2022-10-23 stsp parse_config(const char *filename, enum gotd_procid proc_id,
691 13b2bc37 2022-10-23 stsp     struct gotd *env)
692 13b2bc37 2022-10-23 stsp {
693 13b2bc37 2022-10-23 stsp 	struct sym *sym, *next;
694 3b706203 2023-01-02 stsp 	struct gotd_repo *repo;
695 13b2bc37 2022-10-23 stsp 
696 13b2bc37 2022-10-23 stsp 	memset(env, 0, sizeof(*env));
697 13b2bc37 2022-10-23 stsp 
698 13b2bc37 2022-10-23 stsp 	gotd = env;
699 13b2bc37 2022-10-23 stsp 	gotd_proc_id = proc_id;
700 13b2bc37 2022-10-23 stsp 	TAILQ_INIT(&gotd->repos);
701 13b2bc37 2022-10-23 stsp 
702 13b2bc37 2022-10-23 stsp 	/* Apply default values. */
703 13b2bc37 2022-10-23 stsp 	if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
704 13b2bc37 2022-10-23 stsp 	    sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
705 13b2bc37 2022-10-23 stsp 		fprintf(stderr, "%s: unix socket path too long", __func__);
706 13b2bc37 2022-10-23 stsp 		return -1;
707 13b2bc37 2022-10-23 stsp 	}
708 13b2bc37 2022-10-23 stsp 	if (strlcpy(gotd->user_name, GOTD_USER,
709 13b2bc37 2022-10-23 stsp 	    sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
710 13b2bc37 2022-10-23 stsp 		fprintf(stderr, "%s: user name too long", __func__);
711 13b2bc37 2022-10-23 stsp 		return -1;
712 13b2bc37 2022-10-23 stsp 	}
713 40b85cca 2023-01-03 stsp 
714 40b85cca 2023-01-03 stsp 	gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
715 40b85cca 2023-01-03 stsp 	gotd->request_timeout.tv_usec = 0;
716 13b2bc37 2022-10-23 stsp 
717 13b2bc37 2022-10-23 stsp 	file = newfile(filename, 0);
718 13b2bc37 2022-10-23 stsp 	if (file == NULL) {
719 13b2bc37 2022-10-23 stsp 		/* just return, as we don't require a conf file */
720 13b2bc37 2022-10-23 stsp 		return (0);
721 13b2bc37 2022-10-23 stsp 	}
722 13b2bc37 2022-10-23 stsp 
723 13b2bc37 2022-10-23 stsp 	yyparse();
724 13b2bc37 2022-10-23 stsp 	errors = file->errors;
725 13b2bc37 2022-10-23 stsp 	closefile(file);
726 13b2bc37 2022-10-23 stsp 
727 13b2bc37 2022-10-23 stsp 	/* Free macros and check which have not been used. */
728 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
729 13b2bc37 2022-10-23 stsp 		if ((gotd->verbosity > 1) && !sym->used)
730 13b2bc37 2022-10-23 stsp 			fprintf(stderr, "warning: macro '%s' not used\n",
731 13b2bc37 2022-10-23 stsp 			    sym->nam);
732 13b2bc37 2022-10-23 stsp 		if (!sym->persist) {
733 13b2bc37 2022-10-23 stsp 			free(sym->nam);
734 13b2bc37 2022-10-23 stsp 			free(sym->val);
735 13b2bc37 2022-10-23 stsp 			TAILQ_REMOVE(&symhead, sym, entry);
736 13b2bc37 2022-10-23 stsp 			free(sym);
737 13b2bc37 2022-10-23 stsp 		}
738 13b2bc37 2022-10-23 stsp 	}
739 13b2bc37 2022-10-23 stsp 
740 13b2bc37 2022-10-23 stsp 	if (errors)
741 13b2bc37 2022-10-23 stsp 		return (-1);
742 13b2bc37 2022-10-23 stsp 
743 3b706203 2023-01-02 stsp 	TAILQ_FOREACH(repo, &gotd->repos, entry) {
744 3b706203 2023-01-02 stsp 		if (repo->path[0] == '\0') {
745 2507ffb7 2023-01-02 stsp 			log_warnx("repository \"%s\": no path provided in "
746 2507ffb7 2023-01-02 stsp 			    "configuration file", repo->name);
747 3b706203 2023-01-02 stsp 			return (-1);
748 3b706203 2023-01-02 stsp 		}
749 3b706203 2023-01-02 stsp 	}
750 3b706203 2023-01-02 stsp 
751 809a54db 2023-01-18 op 	if (proc_id == PROC_GOTD && TAILQ_EMPTY(&gotd->repos)) {
752 809a54db 2023-01-18 op 		log_warnx("no repository defined in configuration file");
753 809a54db 2023-01-18 op 		return (-1);
754 809a54db 2023-01-18 op 	}
755 809a54db 2023-01-18 op 
756 13b2bc37 2022-10-23 stsp 	return (0);
757 13b2bc37 2022-10-23 stsp }
758 13b2bc37 2022-10-23 stsp 
759 40b85cca 2023-01-03 stsp static int
760 40b85cca 2023-01-03 stsp uid_connection_limit_cmp(const void *pa, const void *pb)
761 40b85cca 2023-01-03 stsp {
762 40b85cca 2023-01-03 stsp 	const struct gotd_uid_connection_limit *a = pa, *b = pb;
763 40b85cca 2023-01-03 stsp 
764 40b85cca 2023-01-03 stsp 	if (a->uid < b->uid)
765 40b85cca 2023-01-03 stsp 		return -1;
766 40b85cca 2023-01-03 stsp 	else if (a->uid > b->uid);
767 40b85cca 2023-01-03 stsp 		return 1;
768 40b85cca 2023-01-03 stsp 
769 40b85cca 2023-01-03 stsp 	return 0;
770 40b85cca 2023-01-03 stsp }
771 40b85cca 2023-01-03 stsp 
772 40b85cca 2023-01-03 stsp static int
773 40b85cca 2023-01-03 stsp conf_limit_user_connections(const char *user, int maximum)
774 40b85cca 2023-01-03 stsp {
775 40b85cca 2023-01-03 stsp 	uid_t uid;
776 40b85cca 2023-01-03 stsp 	struct gotd_uid_connection_limit *limit;
777 40b85cca 2023-01-03 stsp 	size_t nlimits;
778 40b85cca 2023-01-03 stsp 
779 40b85cca 2023-01-03 stsp 	if (maximum < 1) {
780 40b85cca 2023-01-03 stsp 		yyerror("max connections cannot be smaller 1");
781 40b85cca 2023-01-03 stsp 		return -1;
782 40b85cca 2023-01-03 stsp 	}
783 40b85cca 2023-01-03 stsp 	if (maximum > GOTD_MAXCLIENTS) {
784 40b85cca 2023-01-03 stsp 		yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
785 40b85cca 2023-01-03 stsp 		return -1;
786 40b85cca 2023-01-03 stsp 	}
787 40b85cca 2023-01-03 stsp 
788 40b85cca 2023-01-03 stsp 	if (gotd_auth_parseuid(user, &uid) == -1) {
789 40b85cca 2023-01-03 stsp 		yyerror("%s: no such user", user);
790 40b85cca 2023-01-03 stsp 		return -1;
791 40b85cca 2023-01-03 stsp 	}
792 40b85cca 2023-01-03 stsp 
793 40b85cca 2023-01-03 stsp 	limit = gotd_find_uid_connection_limit(gotd->connection_limits,
794 40b85cca 2023-01-03 stsp 	    gotd->nconnection_limits, uid);
795 40b85cca 2023-01-03 stsp 	if (limit) {
796 40b85cca 2023-01-03 stsp 		limit->max_connections = maximum;
797 40b85cca 2023-01-03 stsp 		return 0;
798 40b85cca 2023-01-03 stsp 	}
799 40b85cca 2023-01-03 stsp 
800 40b85cca 2023-01-03 stsp 	limit = gotd->connection_limits;
801 40b85cca 2023-01-03 stsp 	nlimits = gotd->nconnection_limits + 1;
802 40b85cca 2023-01-03 stsp 	limit = reallocarray(limit, nlimits, sizeof(*limit));
803 40b85cca 2023-01-03 stsp 	if (limit == NULL)
804 40b85cca 2023-01-03 stsp 		fatal("reallocarray");
805 40b85cca 2023-01-03 stsp 
806 40b85cca 2023-01-03 stsp 	limit[nlimits - 1].uid = uid;
807 40b85cca 2023-01-03 stsp 	limit[nlimits - 1].max_connections = maximum;
808 40b85cca 2023-01-03 stsp 
809 40b85cca 2023-01-03 stsp 	gotd->connection_limits = limit;
810 40b85cca 2023-01-03 stsp 	gotd->nconnection_limits = nlimits;
811 40b85cca 2023-01-03 stsp 	qsort(gotd->connection_limits, gotd->nconnection_limits,
812 40b85cca 2023-01-03 stsp 	    sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
813 40b85cca 2023-01-03 stsp 
814 40b85cca 2023-01-03 stsp 	return 0;
815 40b85cca 2023-01-03 stsp }
816 40b85cca 2023-01-03 stsp 
817 13b2bc37 2022-10-23 stsp static struct gotd_repo *
818 13b2bc37 2022-10-23 stsp conf_new_repo(const char *name)
819 13b2bc37 2022-10-23 stsp {
820 13b2bc37 2022-10-23 stsp 	struct gotd_repo *repo;
821 13b2bc37 2022-10-23 stsp 
822 7683f79a 2023-01-02 stsp 	if (name[0] == '\0') {
823 7683f79a 2023-01-02 stsp 		fatalx("syntax error: empty repository name found in %s",
824 7683f79a 2023-01-02 stsp 		    file->name);
825 7683f79a 2023-01-02 stsp 	}
826 7683f79a 2023-01-02 stsp 
827 2507ffb7 2023-01-02 stsp 	if (strchr(name, '\n') != NULL)
828 2507ffb7 2023-01-02 stsp 		fatalx("repository names must not contain linefeeds: %s", name);
829 13b2bc37 2022-10-23 stsp 
830 13b2bc37 2022-10-23 stsp 	repo = calloc(1, sizeof(*repo));
831 13b2bc37 2022-10-23 stsp 	if (repo == NULL)
832 13b2bc37 2022-10-23 stsp 		fatalx("%s: calloc", __func__);
833 13b2bc37 2022-10-23 stsp 
834 0ccf3acb 2022-11-16 stsp 	STAILQ_INIT(&repo->rules);
835 0ccf3acb 2022-11-16 stsp 
836 13b2bc37 2022-10-23 stsp 	if (strlcpy(repo->name, name, sizeof(repo->name)) >=
837 13b2bc37 2022-10-23 stsp 	    sizeof(repo->name))
838 13b2bc37 2022-10-23 stsp 		fatalx("%s: strlcpy", __func__);
839 13b2bc37 2022-10-23 stsp 
840 13b2bc37 2022-10-23 stsp 	TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
841 13b2bc37 2022-10-23 stsp 	gotd->nrepos++;
842 13b2bc37 2022-10-23 stsp 
843 13b2bc37 2022-10-23 stsp 	return repo;
844 13b2bc37 2022-10-23 stsp };
845 0ccf3acb 2022-11-16 stsp 
846 0ccf3acb 2022-11-16 stsp static void
847 0ccf3acb 2022-11-16 stsp conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
848 0ccf3acb 2022-11-16 stsp     int authorization, char *identifier)
849 0ccf3acb 2022-11-16 stsp {
850 0ccf3acb 2022-11-16 stsp 	struct gotd_access_rule *rule;
851 0ccf3acb 2022-11-16 stsp 
852 0ccf3acb 2022-11-16 stsp 	rule = calloc(1, sizeof(*rule));
853 0ccf3acb 2022-11-16 stsp 	if (rule == NULL)
854 0ccf3acb 2022-11-16 stsp 		fatal("calloc");
855 13b2bc37 2022-10-23 stsp 
856 0ccf3acb 2022-11-16 stsp 	rule->access = access;
857 0ccf3acb 2022-11-16 stsp 	rule->authorization = authorization;
858 0ccf3acb 2022-11-16 stsp 	rule->identifier = identifier;
859 0ccf3acb 2022-11-16 stsp 
860 0ccf3acb 2022-11-16 stsp 	STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
861 0ccf3acb 2022-11-16 stsp }
862 0ccf3acb 2022-11-16 stsp 
863 13b2bc37 2022-10-23 stsp int
864 13b2bc37 2022-10-23 stsp symset(const char *nam, const char *val, int persist)
865 13b2bc37 2022-10-23 stsp {
866 13b2bc37 2022-10-23 stsp 	struct sym *sym;
867 13b2bc37 2022-10-23 stsp 
868 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(sym, &symhead, entry) {
869 13b2bc37 2022-10-23 stsp 		if (strcmp(nam, sym->nam) == 0)
870 13b2bc37 2022-10-23 stsp 			break;
871 13b2bc37 2022-10-23 stsp 	}
872 13b2bc37 2022-10-23 stsp 
873 13b2bc37 2022-10-23 stsp 	if (sym != NULL) {
874 13b2bc37 2022-10-23 stsp 		if (sym->persist == 1)
875 13b2bc37 2022-10-23 stsp 			return (0);
876 13b2bc37 2022-10-23 stsp 		else {
877 13b2bc37 2022-10-23 stsp 			free(sym->nam);
878 13b2bc37 2022-10-23 stsp 			free(sym->val);
879 13b2bc37 2022-10-23 stsp 			TAILQ_REMOVE(&symhead, sym, entry);
880 13b2bc37 2022-10-23 stsp 			free(sym);
881 13b2bc37 2022-10-23 stsp 		}
882 13b2bc37 2022-10-23 stsp 	}
883 13b2bc37 2022-10-23 stsp 	sym = calloc(1, sizeof(*sym));
884 13b2bc37 2022-10-23 stsp 	if (sym == NULL)
885 13b2bc37 2022-10-23 stsp 		return (-1);
886 13b2bc37 2022-10-23 stsp 
887 13b2bc37 2022-10-23 stsp 	sym->nam = strdup(nam);
888 13b2bc37 2022-10-23 stsp 	if (sym->nam == NULL) {
889 13b2bc37 2022-10-23 stsp 		free(sym);
890 13b2bc37 2022-10-23 stsp 		return (-1);
891 13b2bc37 2022-10-23 stsp 	}
892 13b2bc37 2022-10-23 stsp 	sym->val = strdup(val);
893 13b2bc37 2022-10-23 stsp 	if (sym->val == NULL) {
894 13b2bc37 2022-10-23 stsp 		free(sym->nam);
895 13b2bc37 2022-10-23 stsp 		free(sym);
896 13b2bc37 2022-10-23 stsp 		return (-1);
897 13b2bc37 2022-10-23 stsp 	}
898 13b2bc37 2022-10-23 stsp 	sym->used = 0;
899 13b2bc37 2022-10-23 stsp 	sym->persist = persist;
900 13b2bc37 2022-10-23 stsp 	TAILQ_INSERT_TAIL(&symhead, sym, entry);
901 13b2bc37 2022-10-23 stsp 	return (0);
902 13b2bc37 2022-10-23 stsp }
903 13b2bc37 2022-10-23 stsp 
904 13b2bc37 2022-10-23 stsp char *
905 13b2bc37 2022-10-23 stsp symget(const char *nam)
906 13b2bc37 2022-10-23 stsp {
907 13b2bc37 2022-10-23 stsp 	struct sym *sym;
908 13b2bc37 2022-10-23 stsp 
909 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(sym, &symhead, entry) {
910 13b2bc37 2022-10-23 stsp 		if (strcmp(nam, sym->nam) == 0) {
911 13b2bc37 2022-10-23 stsp 			sym->used = 1;
912 13b2bc37 2022-10-23 stsp 			return (sym->val);
913 13b2bc37 2022-10-23 stsp 		}
914 13b2bc37 2022-10-23 stsp 	}
915 13b2bc37 2022-10-23 stsp 	return (NULL);
916 13b2bc37 2022-10-23 stsp }