1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  * Copyright (c) 2016-2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
  4 3efd8e31 2022-10-23 thomas  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
  5 3efd8e31 2022-10-23 thomas  * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
  6 3efd8e31 2022-10-23 thomas  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
  7 3efd8e31 2022-10-23 thomas  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  8 3efd8e31 2022-10-23 thomas  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
  9 3efd8e31 2022-10-23 thomas  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 10 3efd8e31 2022-10-23 thomas  *
 11 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
 12 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
 13 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
 14 3efd8e31 2022-10-23 thomas  *
 15 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 16 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 17 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 18 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 19 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 20 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 21 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 22 3efd8e31 2022-10-23 thomas  */
 23 3efd8e31 2022-10-23 thomas 
 24 3efd8e31 2022-10-23 thomas %{
 25 3efd8e31 2022-10-23 thomas #include <sys/time.h>
 26 3efd8e31 2022-10-23 thomas #include <sys/types.h>
 27 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
 28 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
 29 3efd8e31 2022-10-23 thomas 
 30 3efd8e31 2022-10-23 thomas #include <ctype.h>
 31 3efd8e31 2022-10-23 thomas #include <err.h>
 32 3efd8e31 2022-10-23 thomas #include <errno.h>
 33 3efd8e31 2022-10-23 thomas #include <event.h>
 34 3efd8e31 2022-10-23 thomas #include <imsg.h>
 35 3efd8e31 2022-10-23 thomas #include <limits.h>
 36 3efd8e31 2022-10-23 thomas #include <sha1.h>
 37 3efd8e31 2022-10-23 thomas #include <stdarg.h>
 38 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 39 3efd8e31 2022-10-23 thomas #include <stdio.h>
 40 3efd8e31 2022-10-23 thomas #include <string.h>
 41 3efd8e31 2022-10-23 thomas #include <syslog.h>
 42 3efd8e31 2022-10-23 thomas #include <unistd.h>
 43 3efd8e31 2022-10-23 thomas 
 44 3efd8e31 2022-10-23 thomas #include "got_error.h"
 45 3efd8e31 2022-10-23 thomas #include "got_path.h"
 46 3efd8e31 2022-10-23 thomas 
 47 3efd8e31 2022-10-23 thomas #include "log.h"
 48 3efd8e31 2022-10-23 thomas #include "gotd.h"
 49 0781db0e 2023-01-06 thomas #include "auth.h"
 50 0781db0e 2023-01-06 thomas #include "listen.h"
 51 3efd8e31 2022-10-23 thomas 
 52 3efd8e31 2022-10-23 thomas TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
 53 3efd8e31 2022-10-23 thomas static struct file {
 54 3efd8e31 2022-10-23 thomas 	TAILQ_ENTRY(file)	 entry;
 55 3efd8e31 2022-10-23 thomas 	FILE			*stream;
 56 3efd8e31 2022-10-23 thomas 	char			*name;
 57 3efd8e31 2022-10-23 thomas 	int			 lineno;
 58 3efd8e31 2022-10-23 thomas 	int			 errors;
 59 3efd8e31 2022-10-23 thomas } *file;
 60 3efd8e31 2022-10-23 thomas struct file	*newfile(const char *, int);
 61 3efd8e31 2022-10-23 thomas static void	 closefile(struct file *);
 62 3efd8e31 2022-10-23 thomas int		 check_file_secrecy(int, const char *);
 63 3efd8e31 2022-10-23 thomas int		 yyparse(void);
 64 3efd8e31 2022-10-23 thomas int		 yylex(void);
 65 3efd8e31 2022-10-23 thomas int		 yyerror(const char *, ...)
 66 3efd8e31 2022-10-23 thomas     __attribute__((__format__ (printf, 1, 2)))
 67 3efd8e31 2022-10-23 thomas     __attribute__((__nonnull__ (1)));
 68 3efd8e31 2022-10-23 thomas int		 kw_cmp(const void *, const void *);
 69 3efd8e31 2022-10-23 thomas int		 lookup(char *);
 70 3efd8e31 2022-10-23 thomas int		 lgetc(int);
 71 3efd8e31 2022-10-23 thomas int		 lungetc(int);
 72 3efd8e31 2022-10-23 thomas int		 findeol(void);
 73 3efd8e31 2022-10-23 thomas 
 74 3efd8e31 2022-10-23 thomas TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
 75 3efd8e31 2022-10-23 thomas struct sym {
 76 3efd8e31 2022-10-23 thomas 	TAILQ_ENTRY(sym)	 entry;
 77 3efd8e31 2022-10-23 thomas 	int			 used;
 78 3efd8e31 2022-10-23 thomas 	int			 persist;
 79 3efd8e31 2022-10-23 thomas 	char			*nam;
 80 3efd8e31 2022-10-23 thomas 	char			*val;
 81 3efd8e31 2022-10-23 thomas };
 82 3efd8e31 2022-10-23 thomas 
 83 3efd8e31 2022-10-23 thomas int	 symset(const char *, const char *, int);
 84 3efd8e31 2022-10-23 thomas char	*symget(const char *);
 85 3efd8e31 2022-10-23 thomas 
 86 3efd8e31 2022-10-23 thomas static int		 errors;
 87 3efd8e31 2022-10-23 thomas 
 88 3efd8e31 2022-10-23 thomas static struct gotd		*gotd;
 89 3efd8e31 2022-10-23 thomas static struct gotd_repo		*new_repo;
 90 67f822ee 2023-01-06 thomas static int			 conf_limit_user_connections(const char *, int);
 91 3efd8e31 2022-10-23 thomas static struct gotd_repo		*conf_new_repo(const char *);
 92 c3841c67 2022-11-18 thomas static void			 conf_new_access_rule(struct gotd_repo *,
 93 c3841c67 2022-11-18 thomas 				    enum gotd_access, int, char *);
 94 3efd8e31 2022-10-23 thomas static enum gotd_procid		 gotd_proc_id;
 95 3efd8e31 2022-10-23 thomas 
 96 3efd8e31 2022-10-23 thomas typedef struct {
 97 3efd8e31 2022-10-23 thomas 	union {
 98 3efd8e31 2022-10-23 thomas 		long long	 number;
 99 3efd8e31 2022-10-23 thomas 		char		*string;
100 0781db0e 2023-01-06 thomas 		struct timeval	 tv;
101 3efd8e31 2022-10-23 thomas 	} v;
102 3efd8e31 2022-10-23 thomas 	int lineno;
103 3efd8e31 2022-10-23 thomas } YYSTYPE;
104 3efd8e31 2022-10-23 thomas 
105 3efd8e31 2022-10-23 thomas %}
106 3efd8e31 2022-10-23 thomas 
107 f9a4feb6 2023-01-06 thomas %token	PATH ERROR LISTEN ON USER REPOSITORY PERMIT DENY
108 0781db0e 2023-01-06 thomas %token	RO RW CONNECTION LIMIT REQUEST TIMEOUT
109 3efd8e31 2022-10-23 thomas 
110 3efd8e31 2022-10-23 thomas %token	<v.string>	STRING
111 3efd8e31 2022-10-23 thomas %token	<v.number>	NUMBER
112 0781db0e 2023-01-06 thomas %type	<v.tv>		timeout
113 3efd8e31 2022-10-23 thomas 
114 3efd8e31 2022-10-23 thomas %%
115 3efd8e31 2022-10-23 thomas 
116 3efd8e31 2022-10-23 thomas grammar		:
117 3efd8e31 2022-10-23 thomas 		| grammar '\n'
118 3efd8e31 2022-10-23 thomas 		| grammar main '\n'
119 3efd8e31 2022-10-23 thomas 		| grammar repository '\n'
120 3efd8e31 2022-10-23 thomas 		;
121 3efd8e31 2022-10-23 thomas 
122 0781db0e 2023-01-06 thomas timeout		: NUMBER {
123 0781db0e 2023-01-06 thomas 			if ($1 < 0) {
124 0781db0e 2023-01-06 thomas 				yyerror("invalid timeout: %lld", $1);
125 0781db0e 2023-01-06 thomas 				YYERROR;
126 0781db0e 2023-01-06 thomas 			}
127 0781db0e 2023-01-06 thomas 			$$.tv_sec = $1;
128 0781db0e 2023-01-06 thomas 			$$.tv_usec = 0;
129 0781db0e 2023-01-06 thomas 		}
130 77d755e8 2023-01-06 thomas 		| STRING {
131 77d755e8 2023-01-06 thomas 			const char	*errstr;
132 77d755e8 2023-01-06 thomas 			const char	*type = "seconds";
133 77d755e8 2023-01-06 thomas 			size_t		 len;
134 77d755e8 2023-01-06 thomas 			int		 mul = 1;
135 77d755e8 2023-01-06 thomas 
136 77d755e8 2023-01-06 thomas 			if (*$1 == '\0') {
137 77d755e8 2023-01-06 thomas 				yyerror("invalid number of seconds: %s", $1);
138 77d755e8 2023-01-06 thomas 				free($1);
139 77d755e8 2023-01-06 thomas 				YYERROR;
140 77d755e8 2023-01-06 thomas 			}
141 77d755e8 2023-01-06 thomas 
142 77d755e8 2023-01-06 thomas 			len = strlen($1);
143 77d755e8 2023-01-06 thomas 			switch ($1[len - 1]) {
144 77d755e8 2023-01-06 thomas 			case 'S':
145 77d755e8 2023-01-06 thomas 			case 's':
146 77d755e8 2023-01-06 thomas 				$1[len - 1] = '\0';
147 77d755e8 2023-01-06 thomas 				break;
148 77d755e8 2023-01-06 thomas 			case 'M':
149 77d755e8 2023-01-06 thomas 			case 'm':
150 77d755e8 2023-01-06 thomas 				type = "minutes";
151 77d755e8 2023-01-06 thomas 				mul = 60;
152 77d755e8 2023-01-06 thomas 				$1[len - 1] = '\0';
153 77d755e8 2023-01-06 thomas 				break;
154 77d755e8 2023-01-06 thomas 			case 'H':
155 77d755e8 2023-01-06 thomas 			case 'h':
156 77d755e8 2023-01-06 thomas 				type = "hours";
157 77d755e8 2023-01-06 thomas 				mul = 60 * 60;
158 77d755e8 2023-01-06 thomas 				$1[len - 1] = '\0';
159 77d755e8 2023-01-06 thomas 				break;
160 77d755e8 2023-01-06 thomas 			}
161 77d755e8 2023-01-06 thomas 
162 77d755e8 2023-01-06 thomas 			$$.tv_usec = 0;
163 85bccbf7 2023-01-06 thomas 			$$.tv_sec = strtonum($1, 0, INT_MAX / mul, &errstr);
164 77d755e8 2023-01-06 thomas 			if (errstr) {
165 77d755e8 2023-01-06 thomas 				yyerror("number of %s is %s: %s", type,
166 77d755e8 2023-01-06 thomas 				    errstr, $1);
167 77d755e8 2023-01-06 thomas 				free($1);
168 77d755e8 2023-01-06 thomas 				YYERROR;
169 77d755e8 2023-01-06 thomas 			}
170 77d755e8 2023-01-06 thomas 
171 77d755e8 2023-01-06 thomas 			$$.tv_sec *= mul;
172 77d755e8 2023-01-06 thomas 			free($1);
173 77d755e8 2023-01-06 thomas 		}
174 0781db0e 2023-01-06 thomas 		;
175 0781db0e 2023-01-06 thomas 
176 f9a4feb6 2023-01-06 thomas main		: LISTEN ON STRING {
177 7348ded8 2023-01-19 thomas 			if (!got_path_is_absolute($3))
178 7348ded8 2023-01-19 thomas 				yyerror("bad unix socket path \"%s\": "
179 7348ded8 2023-01-19 thomas 				    "must be an absolute path", $3);
180 7348ded8 2023-01-19 thomas 
181 2b3d32a1 2022-12-30 thomas 			if (gotd_proc_id == PROC_LISTEN) {
182 f9a4feb6 2023-01-06 thomas 				if (strlcpy(gotd->unix_socket_path, $3,
183 3efd8e31 2022-10-23 thomas 				    sizeof(gotd->unix_socket_path)) >=
184 3efd8e31 2022-10-23 thomas 				    sizeof(gotd->unix_socket_path)) {
185 3efd8e31 2022-10-23 thomas 					yyerror("%s: unix socket path too long",
186 3efd8e31 2022-10-23 thomas 					    __func__);
187 f9a4feb6 2023-01-06 thomas 					free($3);
188 3efd8e31 2022-10-23 thomas 					YYERROR;
189 3efd8e31 2022-10-23 thomas 				}
190 3efd8e31 2022-10-23 thomas 			}
191 f9a4feb6 2023-01-06 thomas 			free($3);
192 3efd8e31 2022-10-23 thomas 		}
193 3efd8e31 2022-10-23 thomas 		| USER STRING {
194 3efd8e31 2022-10-23 thomas 			if (strlcpy(gotd->user_name, $2,
195 3efd8e31 2022-10-23 thomas 			    sizeof(gotd->user_name)) >=
196 3efd8e31 2022-10-23 thomas 			    sizeof(gotd->user_name)) {
197 3efd8e31 2022-10-23 thomas 				yyerror("%s: user name too long", __func__);
198 3efd8e31 2022-10-23 thomas 				free($2);
199 3efd8e31 2022-10-23 thomas 				YYERROR;
200 3efd8e31 2022-10-23 thomas 			}
201 3efd8e31 2022-10-23 thomas 			free($2);
202 3efd8e31 2022-10-23 thomas 		}
203 0781db0e 2023-01-06 thomas 		| connection
204 3efd8e31 2022-10-23 thomas 		;
205 3efd8e31 2022-10-23 thomas 
206 0781db0e 2023-01-06 thomas connection	: CONNECTION '{' optnl conflags_l '}'
207 0781db0e 2023-01-06 thomas 		| CONNECTION conflags
208 0781db0e 2023-01-06 thomas 
209 0781db0e 2023-01-06 thomas conflags_l	: conflags optnl conflags_l
210 0781db0e 2023-01-06 thomas 		| conflags optnl
211 0781db0e 2023-01-06 thomas 		;
212 0781db0e 2023-01-06 thomas 
213 0781db0e 2023-01-06 thomas conflags	: REQUEST TIMEOUT timeout		{
214 912db690 2023-01-06 thomas 			if ($3.tv_sec <= 0) {
215 912db690 2023-01-06 thomas 				yyerror("invalid timeout: %lld", $3.tv_sec);
216 912db690 2023-01-06 thomas 				YYERROR;
217 912db690 2023-01-06 thomas 			}
218 0781db0e 2023-01-06 thomas 			memcpy(&gotd->request_timeout, &$3,
219 0781db0e 2023-01-06 thomas 			    sizeof(gotd->request_timeout));
220 0781db0e 2023-01-06 thomas 		}
221 0781db0e 2023-01-06 thomas 		| LIMIT USER STRING NUMBER	{
222 0781db0e 2023-01-06 thomas 			if (gotd_proc_id == PROC_LISTEN &&
223 0781db0e 2023-01-06 thomas 			    conf_limit_user_connections($3, $4) == -1) {
224 0781db0e 2023-01-06 thomas 				free($3);
225 0781db0e 2023-01-06 thomas 				YYERROR;
226 0781db0e 2023-01-06 thomas 			}
227 0781db0e 2023-01-06 thomas 			free($3);
228 0781db0e 2023-01-06 thomas 		}
229 0781db0e 2023-01-06 thomas 		;
230 0781db0e 2023-01-06 thomas 
231 3efd8e31 2022-10-23 thomas repository	: REPOSITORY STRING {
232 3efd8e31 2022-10-23 thomas 			struct gotd_repo *repo;
233 3efd8e31 2022-10-23 thomas 
234 3efd8e31 2022-10-23 thomas 			TAILQ_FOREACH(repo, &gotd->repos, entry) {
235 3efd8e31 2022-10-23 thomas 				if (strcmp(repo->name, $2) == 0) {
236 3efd8e31 2022-10-23 thomas 					yyerror("duplicate repository '%s'", $2);
237 3efd8e31 2022-10-23 thomas 					free($2);
238 3efd8e31 2022-10-23 thomas 					YYERROR;
239 3efd8e31 2022-10-23 thomas 				}
240 3efd8e31 2022-10-23 thomas 			}
241 3efd8e31 2022-10-23 thomas 
242 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_GOTD ||
243 c669c489 2022-12-30 thomas 			    gotd_proc_id == PROC_AUTH) {
244 3efd8e31 2022-10-23 thomas 				new_repo = conf_new_repo($2);
245 3efd8e31 2022-10-23 thomas 			}
246 3efd8e31 2022-10-23 thomas 			free($2);
247 3efd8e31 2022-10-23 thomas 		} '{' optnl repoopts2 '}' {
248 3efd8e31 2022-10-23 thomas 		}
249 3efd8e31 2022-10-23 thomas 		;
250 3efd8e31 2022-10-23 thomas 
251 3efd8e31 2022-10-23 thomas repoopts1	: PATH STRING {
252 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_GOTD ||
253 c669c489 2022-12-30 thomas 			    gotd_proc_id == PROC_AUTH) {
254 3efd8e31 2022-10-23 thomas 				if (!got_path_is_absolute($2)) {
255 3efd8e31 2022-10-23 thomas 					yyerror("%s: path %s is not absolute",
256 3efd8e31 2022-10-23 thomas 					    __func__, $2);
257 3efd8e31 2022-10-23 thomas 					free($2);
258 3efd8e31 2022-10-23 thomas 					YYERROR;
259 3efd8e31 2022-10-23 thomas 				}
260 fe6a8988 2023-01-08 thomas 				if (realpath($2, new_repo->path) == NULL) {
261 fe6a8988 2023-01-08 thomas 					yyerror("realpath %s: %s", $2, strerror(errno));
262 3efd8e31 2022-10-23 thomas 					free($2);
263 3efd8e31 2022-10-23 thomas 					YYERROR;
264 3efd8e31 2022-10-23 thomas 				}
265 3efd8e31 2022-10-23 thomas 			}
266 3efd8e31 2022-10-23 thomas 			free($2);
267 729a7e24 2022-11-17 thomas 		}
268 729a7e24 2022-11-17 thomas 		| PERMIT RO STRING {
269 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_AUTH) {
270 729a7e24 2022-11-17 thomas 				conf_new_access_rule(new_repo,
271 729a7e24 2022-11-17 thomas 				    GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
272 729a7e24 2022-11-17 thomas 			}
273 729a7e24 2022-11-17 thomas 		}
274 729a7e24 2022-11-17 thomas 		| PERMIT RW STRING {
275 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_AUTH) {
276 729a7e24 2022-11-17 thomas 				conf_new_access_rule(new_repo,
277 729a7e24 2022-11-17 thomas 				    GOTD_ACCESS_PERMITTED,
278 729a7e24 2022-11-17 thomas 				    GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
279 729a7e24 2022-11-17 thomas 			}
280 3efd8e31 2022-10-23 thomas 		}
281 729a7e24 2022-11-17 thomas 		| DENY STRING {
282 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_AUTH) {
283 729a7e24 2022-11-17 thomas 				conf_new_access_rule(new_repo,
284 729a7e24 2022-11-17 thomas 				    GOTD_ACCESS_DENIED, 0, $2);
285 729a7e24 2022-11-17 thomas 			}
286 729a7e24 2022-11-17 thomas 		}
287 3efd8e31 2022-10-23 thomas 		;
288 3efd8e31 2022-10-23 thomas 
289 3efd8e31 2022-10-23 thomas repoopts2	: repoopts2 repoopts1 nl
290 3efd8e31 2022-10-23 thomas 		| repoopts1 optnl
291 3efd8e31 2022-10-23 thomas 		;
292 3efd8e31 2022-10-23 thomas 
293 3efd8e31 2022-10-23 thomas nl		: '\n' optnl
294 3efd8e31 2022-10-23 thomas 		;
295 3efd8e31 2022-10-23 thomas 
296 3efd8e31 2022-10-23 thomas optnl		: '\n' optnl		/* zero or more newlines */
297 3efd8e31 2022-10-23 thomas 		| /* empty */
298 3efd8e31 2022-10-23 thomas 		;
299 3efd8e31 2022-10-23 thomas 
300 3efd8e31 2022-10-23 thomas %%
301 3efd8e31 2022-10-23 thomas 
302 3efd8e31 2022-10-23 thomas struct keywords {
303 3efd8e31 2022-10-23 thomas 	const char	*k_name;
304 3efd8e31 2022-10-23 thomas 	int		 k_val;
305 3efd8e31 2022-10-23 thomas };
306 3efd8e31 2022-10-23 thomas 
307 3efd8e31 2022-10-23 thomas int
308 3efd8e31 2022-10-23 thomas yyerror(const char *fmt, ...)
309 3efd8e31 2022-10-23 thomas {
310 3efd8e31 2022-10-23 thomas 	va_list ap;
311 3efd8e31 2022-10-23 thomas 	char *msg;
312 3efd8e31 2022-10-23 thomas 
313 3efd8e31 2022-10-23 thomas 	file->errors++;
314 3efd8e31 2022-10-23 thomas 	va_start(ap, fmt);
315 3efd8e31 2022-10-23 thomas 	if (vasprintf(&msg, fmt, ap) == -1)
316 3efd8e31 2022-10-23 thomas 		fatalx("yyerror vasprintf");
317 3efd8e31 2022-10-23 thomas 	va_end(ap);
318 3efd8e31 2022-10-23 thomas 	logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
319 3efd8e31 2022-10-23 thomas 	free(msg);
320 3efd8e31 2022-10-23 thomas 	return (0);
321 3efd8e31 2022-10-23 thomas }
322 3efd8e31 2022-10-23 thomas 
323 3efd8e31 2022-10-23 thomas int
324 3efd8e31 2022-10-23 thomas kw_cmp(const void *k, const void *e)
325 3efd8e31 2022-10-23 thomas {
326 3efd8e31 2022-10-23 thomas 	return (strcmp(k, ((const struct keywords *)e)->k_name));
327 3efd8e31 2022-10-23 thomas }
328 3efd8e31 2022-10-23 thomas 
329 3efd8e31 2022-10-23 thomas int
330 3efd8e31 2022-10-23 thomas lookup(char *s)
331 3efd8e31 2022-10-23 thomas {
332 3efd8e31 2022-10-23 thomas 	/* This has to be sorted always. */
333 3efd8e31 2022-10-23 thomas 	static const struct keywords keywords[] = {
334 0781db0e 2023-01-06 thomas 		{ "connection",			CONNECTION },
335 729a7e24 2022-11-17 thomas 		{ "deny",			DENY },
336 0781db0e 2023-01-06 thomas 		{ "limit",			LIMIT },
337 f9a4feb6 2023-01-06 thomas 		{ "listen",			LISTEN },
338 3efd8e31 2022-10-23 thomas 		{ "on",				ON },
339 3efd8e31 2022-10-23 thomas 		{ "path",			PATH },
340 729a7e24 2022-11-17 thomas 		{ "permit",			PERMIT },
341 3efd8e31 2022-10-23 thomas 		{ "repository",			REPOSITORY },
342 0781db0e 2023-01-06 thomas 		{ "request",			REQUEST },
343 729a7e24 2022-11-17 thomas 		{ "ro",				RO },
344 729a7e24 2022-11-17 thomas 		{ "rw",				RW },
345 0781db0e 2023-01-06 thomas 		{ "timeout",			TIMEOUT },
346 3efd8e31 2022-10-23 thomas 		{ "user",			USER },
347 3efd8e31 2022-10-23 thomas 	};
348 3efd8e31 2022-10-23 thomas 	const struct keywords *p;
349 3efd8e31 2022-10-23 thomas 
350 3efd8e31 2022-10-23 thomas 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
351 3efd8e31 2022-10-23 thomas 	    sizeof(keywords[0]), kw_cmp);
352 3efd8e31 2022-10-23 thomas 
353 3efd8e31 2022-10-23 thomas 	if (p)
354 3efd8e31 2022-10-23 thomas 		return (p->k_val);
355 3efd8e31 2022-10-23 thomas 	else
356 3efd8e31 2022-10-23 thomas 		return (STRING);
357 3efd8e31 2022-10-23 thomas }
358 3efd8e31 2022-10-23 thomas 
359 3efd8e31 2022-10-23 thomas #define MAXPUSHBACK	128
360 3efd8e31 2022-10-23 thomas 
361 3efd8e31 2022-10-23 thomas unsigned char *parsebuf;
362 3efd8e31 2022-10-23 thomas int parseindex;
363 3efd8e31 2022-10-23 thomas unsigned char pushback_buffer[MAXPUSHBACK];
364 3efd8e31 2022-10-23 thomas int pushback_index = 0;
365 3efd8e31 2022-10-23 thomas 
366 3efd8e31 2022-10-23 thomas int
367 3efd8e31 2022-10-23 thomas lgetc(int quotec)
368 3efd8e31 2022-10-23 thomas {
369 3efd8e31 2022-10-23 thomas 	int c, next;
370 3efd8e31 2022-10-23 thomas 
371 3efd8e31 2022-10-23 thomas 	if (parsebuf) {
372 3efd8e31 2022-10-23 thomas 		/* Read character from the parsebuffer instead of input. */
373 3efd8e31 2022-10-23 thomas 		if (parseindex >= 0) {
374 3efd8e31 2022-10-23 thomas 			c = parsebuf[parseindex++];
375 3efd8e31 2022-10-23 thomas 			if (c != '\0')
376 3efd8e31 2022-10-23 thomas 				return (c);
377 3efd8e31 2022-10-23 thomas 			parsebuf = NULL;
378 3efd8e31 2022-10-23 thomas 		} else
379 3efd8e31 2022-10-23 thomas 			parseindex++;
380 3efd8e31 2022-10-23 thomas 	}
381 3efd8e31 2022-10-23 thomas 
382 3efd8e31 2022-10-23 thomas 	if (pushback_index)
383 3efd8e31 2022-10-23 thomas 		return (pushback_buffer[--pushback_index]);
384 3efd8e31 2022-10-23 thomas 
385 3efd8e31 2022-10-23 thomas 	if (quotec) {
386 3efd8e31 2022-10-23 thomas 		c = getc(file->stream);
387 3efd8e31 2022-10-23 thomas 		if (c == EOF)
388 3efd8e31 2022-10-23 thomas 			yyerror("reached end of file while parsing "
389 3efd8e31 2022-10-23 thomas 			    "quoted string");
390 3efd8e31 2022-10-23 thomas 		return (c);
391 3efd8e31 2022-10-23 thomas 	}
392 3efd8e31 2022-10-23 thomas 
393 3efd8e31 2022-10-23 thomas 	c = getc(file->stream);
394 3efd8e31 2022-10-23 thomas 	while (c == '\\') {
395 3efd8e31 2022-10-23 thomas 		next = getc(file->stream);
396 3efd8e31 2022-10-23 thomas 		if (next != '\n') {
397 3efd8e31 2022-10-23 thomas 			c = next;
398 3efd8e31 2022-10-23 thomas 			break;
399 3efd8e31 2022-10-23 thomas 		}
400 3efd8e31 2022-10-23 thomas 		yylval.lineno = file->lineno;
401 3efd8e31 2022-10-23 thomas 		file->lineno++;
402 3efd8e31 2022-10-23 thomas 		c = getc(file->stream);
403 3efd8e31 2022-10-23 thomas 	}
404 3efd8e31 2022-10-23 thomas 
405 3efd8e31 2022-10-23 thomas 	return (c);
406 3efd8e31 2022-10-23 thomas }
407 3efd8e31 2022-10-23 thomas 
408 3efd8e31 2022-10-23 thomas int
409 3efd8e31 2022-10-23 thomas lungetc(int c)
410 3efd8e31 2022-10-23 thomas {
411 3efd8e31 2022-10-23 thomas 	if (c == EOF)
412 3efd8e31 2022-10-23 thomas 		return (EOF);
413 3efd8e31 2022-10-23 thomas 	if (parsebuf) {
414 3efd8e31 2022-10-23 thomas 		parseindex--;
415 3efd8e31 2022-10-23 thomas 		if (parseindex >= 0)
416 3efd8e31 2022-10-23 thomas 			return (c);
417 3efd8e31 2022-10-23 thomas 	}
418 3efd8e31 2022-10-23 thomas 	if (pushback_index < MAXPUSHBACK-1)
419 3efd8e31 2022-10-23 thomas 		return (pushback_buffer[pushback_index++] = c);
420 3efd8e31 2022-10-23 thomas 	else
421 3efd8e31 2022-10-23 thomas 		return (EOF);
422 3efd8e31 2022-10-23 thomas }
423 3efd8e31 2022-10-23 thomas 
424 3efd8e31 2022-10-23 thomas int
425 3efd8e31 2022-10-23 thomas findeol(void)
426 3efd8e31 2022-10-23 thomas {
427 3efd8e31 2022-10-23 thomas 	int c;
428 3efd8e31 2022-10-23 thomas 
429 3efd8e31 2022-10-23 thomas 	parsebuf = NULL;
430 3efd8e31 2022-10-23 thomas 
431 3efd8e31 2022-10-23 thomas 	/* Skip to either EOF or the first real EOL. */
432 3efd8e31 2022-10-23 thomas 	while (1) {
433 3efd8e31 2022-10-23 thomas 		if (pushback_index)
434 3efd8e31 2022-10-23 thomas 			c = pushback_buffer[--pushback_index];
435 3efd8e31 2022-10-23 thomas 		else
436 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
437 3efd8e31 2022-10-23 thomas 		if (c == '\n') {
438 3efd8e31 2022-10-23 thomas 			file->lineno++;
439 3efd8e31 2022-10-23 thomas 			break;
440 3efd8e31 2022-10-23 thomas 		}
441 3efd8e31 2022-10-23 thomas 		if (c == EOF)
442 3efd8e31 2022-10-23 thomas 			break;
443 3efd8e31 2022-10-23 thomas 	}
444 3efd8e31 2022-10-23 thomas 	return (ERROR);
445 3efd8e31 2022-10-23 thomas }
446 3efd8e31 2022-10-23 thomas 
447 3efd8e31 2022-10-23 thomas int
448 3efd8e31 2022-10-23 thomas yylex(void)
449 3efd8e31 2022-10-23 thomas {
450 3efd8e31 2022-10-23 thomas 	unsigned char buf[8096];
451 3efd8e31 2022-10-23 thomas 	unsigned char *p, *val;
452 3efd8e31 2022-10-23 thomas 	int quotec, next, c;
453 3efd8e31 2022-10-23 thomas 	int token;
454 3efd8e31 2022-10-23 thomas 
455 3efd8e31 2022-10-23 thomas top:
456 3efd8e31 2022-10-23 thomas 	p = buf;
457 3efd8e31 2022-10-23 thomas 	c = lgetc(0);
458 3efd8e31 2022-10-23 thomas 	while (c == ' ' || c == '\t')
459 3efd8e31 2022-10-23 thomas 		c = lgetc(0); /* nothing */
460 3efd8e31 2022-10-23 thomas 
461 3efd8e31 2022-10-23 thomas 	yylval.lineno = file->lineno;
462 3efd8e31 2022-10-23 thomas 	if (c == '#') {
463 3efd8e31 2022-10-23 thomas 		c = lgetc(0);
464 3efd8e31 2022-10-23 thomas 		while (c != '\n' && c != EOF)
465 3efd8e31 2022-10-23 thomas 			c = lgetc(0); /* nothing */
466 3efd8e31 2022-10-23 thomas 	}
467 3efd8e31 2022-10-23 thomas 	if (c == '$' && parsebuf == NULL) {
468 3efd8e31 2022-10-23 thomas 		while (1) {
469 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
470 3efd8e31 2022-10-23 thomas 			if (c == EOF)
471 3efd8e31 2022-10-23 thomas 				return (0);
472 3efd8e31 2022-10-23 thomas 
473 3efd8e31 2022-10-23 thomas 			if (p + 1 >= buf + sizeof(buf) - 1) {
474 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
475 3efd8e31 2022-10-23 thomas 				return (findeol());
476 3efd8e31 2022-10-23 thomas 			}
477 3efd8e31 2022-10-23 thomas 			if (isalnum(c) || c == '_') {
478 3efd8e31 2022-10-23 thomas 				*p++ = c;
479 3efd8e31 2022-10-23 thomas 				continue;
480 3efd8e31 2022-10-23 thomas 			}
481 3efd8e31 2022-10-23 thomas 			*p = '\0';
482 3efd8e31 2022-10-23 thomas 			lungetc(c);
483 3efd8e31 2022-10-23 thomas 			break;
484 3efd8e31 2022-10-23 thomas 		}
485 3efd8e31 2022-10-23 thomas 		val = symget(buf);
486 3efd8e31 2022-10-23 thomas 		if (val == NULL) {
487 3efd8e31 2022-10-23 thomas 			yyerror("macro '%s' not defined", buf);
488 3efd8e31 2022-10-23 thomas 			return (findeol());
489 3efd8e31 2022-10-23 thomas 		}
490 3efd8e31 2022-10-23 thomas 		parsebuf = val;
491 3efd8e31 2022-10-23 thomas 		parseindex = 0;
492 3efd8e31 2022-10-23 thomas 		goto top;
493 3efd8e31 2022-10-23 thomas 	}
494 3efd8e31 2022-10-23 thomas 
495 3efd8e31 2022-10-23 thomas 	switch (c) {
496 3efd8e31 2022-10-23 thomas 	case '\'':
497 3efd8e31 2022-10-23 thomas 	case '"':
498 3efd8e31 2022-10-23 thomas 		quotec = c;
499 3efd8e31 2022-10-23 thomas 		while (1) {
500 3efd8e31 2022-10-23 thomas 			c = lgetc(quotec);
501 3efd8e31 2022-10-23 thomas 			if (c == EOF)
502 3efd8e31 2022-10-23 thomas 				return (0);
503 3efd8e31 2022-10-23 thomas 			if (c == '\n') {
504 3efd8e31 2022-10-23 thomas 				file->lineno++;
505 3efd8e31 2022-10-23 thomas 				continue;
506 3efd8e31 2022-10-23 thomas 			} else if (c == '\\') {
507 3efd8e31 2022-10-23 thomas 				next = lgetc(quotec);
508 3efd8e31 2022-10-23 thomas 				if (next == EOF)
509 3efd8e31 2022-10-23 thomas 					return (0);
510 3efd8e31 2022-10-23 thomas 				if (next == quotec || c == ' ' || c == '\t')
511 3efd8e31 2022-10-23 thomas 					c = next;
512 3efd8e31 2022-10-23 thomas 				else if (next == '\n') {
513 3efd8e31 2022-10-23 thomas 					file->lineno++;
514 3efd8e31 2022-10-23 thomas 					continue;
515 3efd8e31 2022-10-23 thomas 				} else
516 3efd8e31 2022-10-23 thomas 					lungetc(next);
517 3efd8e31 2022-10-23 thomas 			} else if (c == quotec) {
518 3efd8e31 2022-10-23 thomas 				*p = '\0';
519 3efd8e31 2022-10-23 thomas 				break;
520 3efd8e31 2022-10-23 thomas 			} else if (c == '\0') {
521 3efd8e31 2022-10-23 thomas 				yyerror("syntax error");
522 3efd8e31 2022-10-23 thomas 				return (findeol());
523 3efd8e31 2022-10-23 thomas 			}
524 3efd8e31 2022-10-23 thomas 			if (p + 1 >= buf + sizeof(buf) - 1) {
525 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
526 3efd8e31 2022-10-23 thomas 				return (findeol());
527 3efd8e31 2022-10-23 thomas 			}
528 3efd8e31 2022-10-23 thomas 			*p++ = c;
529 3efd8e31 2022-10-23 thomas 		}
530 3efd8e31 2022-10-23 thomas 		yylval.v.string = strdup(buf);
531 3efd8e31 2022-10-23 thomas 		if (yylval.v.string == NULL)
532 3efd8e31 2022-10-23 thomas 			err(1, "yylex: strdup");
533 3efd8e31 2022-10-23 thomas 		return (STRING);
534 3efd8e31 2022-10-23 thomas 	}
535 3efd8e31 2022-10-23 thomas 
536 3efd8e31 2022-10-23 thomas #define allowed_to_end_number(x) \
537 3efd8e31 2022-10-23 thomas 	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
538 3efd8e31 2022-10-23 thomas 
539 3efd8e31 2022-10-23 thomas 	if (c == '-' || isdigit(c)) {
540 3efd8e31 2022-10-23 thomas 		do {
541 3efd8e31 2022-10-23 thomas 			*p++ = c;
542 3efd8e31 2022-10-23 thomas 			if ((unsigned)(p-buf) >= sizeof(buf)) {
543 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
544 3efd8e31 2022-10-23 thomas 				return (findeol());
545 3efd8e31 2022-10-23 thomas 			}
546 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
547 3efd8e31 2022-10-23 thomas 		} while (c != EOF && isdigit(c));
548 3efd8e31 2022-10-23 thomas 		lungetc(c);
549 3efd8e31 2022-10-23 thomas 		if (p == buf + 1 && buf[0] == '-')
550 3efd8e31 2022-10-23 thomas 			goto nodigits;
551 3efd8e31 2022-10-23 thomas 		if (c == EOF || allowed_to_end_number(c)) {
552 3efd8e31 2022-10-23 thomas 			const char *errstr = NULL;
553 3efd8e31 2022-10-23 thomas 
554 3efd8e31 2022-10-23 thomas 			*p = '\0';
555 3efd8e31 2022-10-23 thomas 			yylval.v.number = strtonum(buf, LLONG_MIN,
556 3efd8e31 2022-10-23 thomas 			    LLONG_MAX, &errstr);
557 3efd8e31 2022-10-23 thomas 			if (errstr) {
558 3efd8e31 2022-10-23 thomas 				yyerror("\"%s\" invalid number: %s",
559 3efd8e31 2022-10-23 thomas 				    buf, errstr);
560 3efd8e31 2022-10-23 thomas 				return (findeol());
561 3efd8e31 2022-10-23 thomas 			}
562 3efd8e31 2022-10-23 thomas 			return (NUMBER);
563 3efd8e31 2022-10-23 thomas 		} else {
564 3efd8e31 2022-10-23 thomas nodigits:
565 3efd8e31 2022-10-23 thomas 			while (p > buf + 1)
566 3efd8e31 2022-10-23 thomas 				lungetc(*--p);
567 3efd8e31 2022-10-23 thomas 			c = *--p;
568 3efd8e31 2022-10-23 thomas 			if (c == '-')
569 3efd8e31 2022-10-23 thomas 				return (c);
570 3efd8e31 2022-10-23 thomas 		}
571 3efd8e31 2022-10-23 thomas 	}
572 3efd8e31 2022-10-23 thomas 
573 3efd8e31 2022-10-23 thomas #define allowed_in_string(x) \
574 3efd8e31 2022-10-23 thomas 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
575 3efd8e31 2022-10-23 thomas 	x != '{' && x != '}' && \
576 3efd8e31 2022-10-23 thomas 	x != '!' && x != '=' && x != '#' && \
577 3efd8e31 2022-10-23 thomas 	x != ','))
578 3efd8e31 2022-10-23 thomas 
579 3efd8e31 2022-10-23 thomas 	if (isalnum(c) || c == ':' || c == '_') {
580 3efd8e31 2022-10-23 thomas 		do {
581 3efd8e31 2022-10-23 thomas 			*p++ = c;
582 3efd8e31 2022-10-23 thomas 			if ((unsigned)(p-buf) >= sizeof(buf)) {
583 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
584 3efd8e31 2022-10-23 thomas 				return (findeol());
585 3efd8e31 2022-10-23 thomas 			}
586 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
587 3efd8e31 2022-10-23 thomas 		} while (c != EOF && (allowed_in_string(c)));
588 3efd8e31 2022-10-23 thomas 		lungetc(c);
589 3efd8e31 2022-10-23 thomas 		*p = '\0';
590 3efd8e31 2022-10-23 thomas 		token = lookup(buf);
591 3efd8e31 2022-10-23 thomas 		if (token == STRING) {
592 3efd8e31 2022-10-23 thomas 			yylval.v.string = strdup(buf);
593 3efd8e31 2022-10-23 thomas 			if (yylval.v.string == NULL)
594 3efd8e31 2022-10-23 thomas 				err(1, "yylex: strdup");
595 3efd8e31 2022-10-23 thomas 		}
596 3efd8e31 2022-10-23 thomas 		return (token);
597 3efd8e31 2022-10-23 thomas 	}
598 3efd8e31 2022-10-23 thomas 	if (c == '\n') {
599 3efd8e31 2022-10-23 thomas 		yylval.lineno = file->lineno;
600 3efd8e31 2022-10-23 thomas 		file->lineno++;
601 3efd8e31 2022-10-23 thomas 	}
602 3efd8e31 2022-10-23 thomas 	if (c == EOF)
603 3efd8e31 2022-10-23 thomas 		return (0);
604 3efd8e31 2022-10-23 thomas 	return (c);
605 3efd8e31 2022-10-23 thomas }
606 3efd8e31 2022-10-23 thomas 
607 3efd8e31 2022-10-23 thomas int
608 3efd8e31 2022-10-23 thomas check_file_secrecy(int fd, const char *fname)
609 3efd8e31 2022-10-23 thomas {
610 3efd8e31 2022-10-23 thomas 	struct stat st;
611 3efd8e31 2022-10-23 thomas 
612 3efd8e31 2022-10-23 thomas 	if (fstat(fd, &st)) {
613 3efd8e31 2022-10-23 thomas 		log_warn("cannot stat %s", fname);
614 3efd8e31 2022-10-23 thomas 		return (-1);
615 3efd8e31 2022-10-23 thomas 	}
616 3efd8e31 2022-10-23 thomas 	if (st.st_uid != 0 && st.st_uid != getuid()) {
617 3efd8e31 2022-10-23 thomas 		log_warnx("%s: owner not root or current user", fname);
618 3efd8e31 2022-10-23 thomas 		return (-1);
619 3efd8e31 2022-10-23 thomas 	}
620 3efd8e31 2022-10-23 thomas 	if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
621 3efd8e31 2022-10-23 thomas 		log_warnx("%s: group writable or world read/writable", fname);
622 3efd8e31 2022-10-23 thomas 		return (-1);
623 3efd8e31 2022-10-23 thomas 	}
624 3efd8e31 2022-10-23 thomas 	return (0);
625 3efd8e31 2022-10-23 thomas }
626 3efd8e31 2022-10-23 thomas 
627 3efd8e31 2022-10-23 thomas struct file *
628 3efd8e31 2022-10-23 thomas newfile(const char *name, int secret)
629 3efd8e31 2022-10-23 thomas {
630 3efd8e31 2022-10-23 thomas 	struct file *nfile;
631 3efd8e31 2022-10-23 thomas 
632 3efd8e31 2022-10-23 thomas 	nfile = calloc(1, sizeof(struct file));
633 3efd8e31 2022-10-23 thomas 	if (nfile == NULL) {
634 3efd8e31 2022-10-23 thomas 		log_warn("calloc");
635 3efd8e31 2022-10-23 thomas 		return (NULL);
636 3efd8e31 2022-10-23 thomas 	}
637 3efd8e31 2022-10-23 thomas 	nfile->name = strdup(name);
638 3efd8e31 2022-10-23 thomas 	if (nfile->name == NULL) {
639 3efd8e31 2022-10-23 thomas 		log_warn("strdup");
640 3efd8e31 2022-10-23 thomas 		free(nfile);
641 3efd8e31 2022-10-23 thomas 		return (NULL);
642 3efd8e31 2022-10-23 thomas 	}
643 3efd8e31 2022-10-23 thomas 	nfile->stream = fopen(nfile->name, "r");
644 3efd8e31 2022-10-23 thomas 	if (nfile->stream == NULL) {
645 3efd8e31 2022-10-23 thomas 		/* no warning, we don't require a conf file */
646 3efd8e31 2022-10-23 thomas 		free(nfile->name);
647 3efd8e31 2022-10-23 thomas 		free(nfile);
648 3efd8e31 2022-10-23 thomas 		return (NULL);
649 3efd8e31 2022-10-23 thomas 	} else if (secret &&
650 3efd8e31 2022-10-23 thomas 	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
651 3efd8e31 2022-10-23 thomas 		fclose(nfile->stream);
652 3efd8e31 2022-10-23 thomas 		free(nfile->name);
653 3efd8e31 2022-10-23 thomas 		free(nfile);
654 3efd8e31 2022-10-23 thomas 		return (NULL);
655 3efd8e31 2022-10-23 thomas 	}
656 3efd8e31 2022-10-23 thomas 	nfile->lineno = 1;
657 3efd8e31 2022-10-23 thomas 	return (nfile);
658 3efd8e31 2022-10-23 thomas }
659 3efd8e31 2022-10-23 thomas 
660 3efd8e31 2022-10-23 thomas static void
661 3efd8e31 2022-10-23 thomas closefile(struct file *xfile)
662 3efd8e31 2022-10-23 thomas {
663 3efd8e31 2022-10-23 thomas 	fclose(xfile->stream);
664 3efd8e31 2022-10-23 thomas 	free(xfile->name);
665 3efd8e31 2022-10-23 thomas 	free(xfile);
666 3efd8e31 2022-10-23 thomas }
667 3efd8e31 2022-10-23 thomas 
668 3efd8e31 2022-10-23 thomas int
669 3efd8e31 2022-10-23 thomas parse_config(const char *filename, enum gotd_procid proc_id,
670 3efd8e31 2022-10-23 thomas     struct gotd *env)
671 3efd8e31 2022-10-23 thomas {
672 3efd8e31 2022-10-23 thomas 	struct sym *sym, *next;
673 88f1bb6d 2023-01-02 thomas 	struct gotd_repo *repo;
674 3efd8e31 2022-10-23 thomas 
675 3efd8e31 2022-10-23 thomas 	memset(env, 0, sizeof(*env));
676 3efd8e31 2022-10-23 thomas 
677 3efd8e31 2022-10-23 thomas 	gotd = env;
678 3efd8e31 2022-10-23 thomas 	gotd_proc_id = proc_id;
679 3efd8e31 2022-10-23 thomas 	TAILQ_INIT(&gotd->repos);
680 3efd8e31 2022-10-23 thomas 
681 3efd8e31 2022-10-23 thomas 	/* Apply default values. */
682 3efd8e31 2022-10-23 thomas 	if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
683 3efd8e31 2022-10-23 thomas 	    sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
684 3efd8e31 2022-10-23 thomas 		fprintf(stderr, "%s: unix socket path too long", __func__);
685 3efd8e31 2022-10-23 thomas 		return -1;
686 3efd8e31 2022-10-23 thomas 	}
687 3efd8e31 2022-10-23 thomas 	if (strlcpy(gotd->user_name, GOTD_USER,
688 3efd8e31 2022-10-23 thomas 	    sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
689 3efd8e31 2022-10-23 thomas 		fprintf(stderr, "%s: user name too long", __func__);
690 3efd8e31 2022-10-23 thomas 		return -1;
691 3efd8e31 2022-10-23 thomas 	}
692 0781db0e 2023-01-06 thomas 
693 0781db0e 2023-01-06 thomas 	gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
694 0781db0e 2023-01-06 thomas 	gotd->request_timeout.tv_usec = 0;
695 3efd8e31 2022-10-23 thomas 
696 3efd8e31 2022-10-23 thomas 	file = newfile(filename, 0);
697 3efd8e31 2022-10-23 thomas 	if (file == NULL) {
698 3efd8e31 2022-10-23 thomas 		/* just return, as we don't require a conf file */
699 3efd8e31 2022-10-23 thomas 		return (0);
700 3efd8e31 2022-10-23 thomas 	}
701 3efd8e31 2022-10-23 thomas 
702 3efd8e31 2022-10-23 thomas 	yyparse();
703 3efd8e31 2022-10-23 thomas 	errors = file->errors;
704 3efd8e31 2022-10-23 thomas 	closefile(file);
705 3efd8e31 2022-10-23 thomas 
706 3efd8e31 2022-10-23 thomas 	/* Free macros and check which have not been used. */
707 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
708 3efd8e31 2022-10-23 thomas 		if ((gotd->verbosity > 1) && !sym->used)
709 3efd8e31 2022-10-23 thomas 			fprintf(stderr, "warning: macro '%s' not used\n",
710 3efd8e31 2022-10-23 thomas 			    sym->nam);
711 3efd8e31 2022-10-23 thomas 		if (!sym->persist) {
712 3efd8e31 2022-10-23 thomas 			free(sym->nam);
713 3efd8e31 2022-10-23 thomas 			free(sym->val);
714 3efd8e31 2022-10-23 thomas 			TAILQ_REMOVE(&symhead, sym, entry);
715 3efd8e31 2022-10-23 thomas 			free(sym);
716 3efd8e31 2022-10-23 thomas 		}
717 3efd8e31 2022-10-23 thomas 	}
718 3efd8e31 2022-10-23 thomas 
719 3efd8e31 2022-10-23 thomas 	if (errors)
720 3efd8e31 2022-10-23 thomas 		return (-1);
721 3efd8e31 2022-10-23 thomas 
722 88f1bb6d 2023-01-02 thomas 	TAILQ_FOREACH(repo, &gotd->repos, entry) {
723 88f1bb6d 2023-01-02 thomas 		if (repo->path[0] == '\0') {
724 0cbf8de7 2023-01-02 thomas 			log_warnx("repository \"%s\": no path provided in "
725 0cbf8de7 2023-01-02 thomas 			    "configuration file", repo->name);
726 88f1bb6d 2023-01-02 thomas 			return (-1);
727 88f1bb6d 2023-01-02 thomas 		}
728 88f1bb6d 2023-01-02 thomas 	}
729 88f1bb6d 2023-01-02 thomas 
730 4d24b1fd 2023-01-19 thomas 	if (proc_id == PROC_GOTD && TAILQ_EMPTY(&gotd->repos)) {
731 4d24b1fd 2023-01-19 thomas 		log_warnx("no repository defined in configuration file");
732 4d24b1fd 2023-01-19 thomas 		return (-1);
733 4d24b1fd 2023-01-19 thomas 	}
734 4d24b1fd 2023-01-19 thomas 
735 3efd8e31 2022-10-23 thomas 	return (0);
736 3efd8e31 2022-10-23 thomas }
737 3efd8e31 2022-10-23 thomas 
738 0781db0e 2023-01-06 thomas static int
739 0781db0e 2023-01-06 thomas uid_connection_limit_cmp(const void *pa, const void *pb)
740 0781db0e 2023-01-06 thomas {
741 0781db0e 2023-01-06 thomas 	const struct gotd_uid_connection_limit *a = pa, *b = pb;
742 0781db0e 2023-01-06 thomas 
743 0781db0e 2023-01-06 thomas 	if (a->uid < b->uid)
744 0781db0e 2023-01-06 thomas 		return -1;
745 0781db0e 2023-01-06 thomas 	else if (a->uid > b->uid);
746 0781db0e 2023-01-06 thomas 		return 1;
747 0781db0e 2023-01-06 thomas 
748 0781db0e 2023-01-06 thomas 	return 0;
749 0781db0e 2023-01-06 thomas }
750 0781db0e 2023-01-06 thomas 
751 0781db0e 2023-01-06 thomas static int
752 0781db0e 2023-01-06 thomas conf_limit_user_connections(const char *user, int maximum)
753 0781db0e 2023-01-06 thomas {
754 0781db0e 2023-01-06 thomas 	uid_t uid;
755 0781db0e 2023-01-06 thomas 	struct gotd_uid_connection_limit *limit;
756 0781db0e 2023-01-06 thomas 	size_t nlimits;
757 0781db0e 2023-01-06 thomas 
758 0781db0e 2023-01-06 thomas 	if (maximum < 1) {
759 0781db0e 2023-01-06 thomas 		yyerror("max connections cannot be smaller 1");
760 0781db0e 2023-01-06 thomas 		return -1;
761 0781db0e 2023-01-06 thomas 	}
762 0781db0e 2023-01-06 thomas 	if (maximum > GOTD_MAXCLIENTS) {
763 0781db0e 2023-01-06 thomas 		yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
764 0781db0e 2023-01-06 thomas 		return -1;
765 0781db0e 2023-01-06 thomas 	}
766 0781db0e 2023-01-06 thomas 
767 0781db0e 2023-01-06 thomas 	if (gotd_auth_parseuid(user, &uid) == -1) {
768 0781db0e 2023-01-06 thomas 		yyerror("%s: no such user", user);
769 0781db0e 2023-01-06 thomas 		return -1;
770 0781db0e 2023-01-06 thomas 	}
771 0781db0e 2023-01-06 thomas 
772 0781db0e 2023-01-06 thomas 	limit = gotd_find_uid_connection_limit(gotd->connection_limits,
773 0781db0e 2023-01-06 thomas 	    gotd->nconnection_limits, uid);
774 0781db0e 2023-01-06 thomas 	if (limit) {
775 0781db0e 2023-01-06 thomas 		limit->max_connections = maximum;
776 0781db0e 2023-01-06 thomas 		return 0;
777 0781db0e 2023-01-06 thomas 	}
778 0781db0e 2023-01-06 thomas 
779 0781db0e 2023-01-06 thomas 	limit = gotd->connection_limits;
780 0781db0e 2023-01-06 thomas 	nlimits = gotd->nconnection_limits + 1;
781 0781db0e 2023-01-06 thomas 	limit = reallocarray(limit, nlimits, sizeof(*limit));
782 0781db0e 2023-01-06 thomas 	if (limit == NULL)
783 0781db0e 2023-01-06 thomas 		fatal("reallocarray");
784 0781db0e 2023-01-06 thomas 
785 0781db0e 2023-01-06 thomas 	limit[nlimits - 1].uid = uid;
786 0781db0e 2023-01-06 thomas 	limit[nlimits - 1].max_connections = maximum;
787 0781db0e 2023-01-06 thomas 
788 0781db0e 2023-01-06 thomas 	gotd->connection_limits = limit;
789 0781db0e 2023-01-06 thomas 	gotd->nconnection_limits = nlimits;
790 0781db0e 2023-01-06 thomas 	qsort(gotd->connection_limits, gotd->nconnection_limits,
791 0781db0e 2023-01-06 thomas 	    sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
792 0781db0e 2023-01-06 thomas 
793 0781db0e 2023-01-06 thomas 	return 0;
794 0781db0e 2023-01-06 thomas }
795 0781db0e 2023-01-06 thomas 
796 3efd8e31 2022-10-23 thomas static struct gotd_repo *
797 3efd8e31 2022-10-23 thomas conf_new_repo(const char *name)
798 3efd8e31 2022-10-23 thomas {
799 3efd8e31 2022-10-23 thomas 	struct gotd_repo *repo;
800 3efd8e31 2022-10-23 thomas 
801 a42b418b 2023-01-02 thomas 	if (name[0] == '\0') {
802 a42b418b 2023-01-02 thomas 		fatalx("syntax error: empty repository name found in %s",
803 a42b418b 2023-01-02 thomas 		    file->name);
804 a42b418b 2023-01-02 thomas 	}
805 a42b418b 2023-01-02 thomas 
806 0cbf8de7 2023-01-02 thomas 	if (strchr(name, '\n') != NULL)
807 0cbf8de7 2023-01-02 thomas 		fatalx("repository names must not contain linefeeds: %s", name);
808 3efd8e31 2022-10-23 thomas 
809 3efd8e31 2022-10-23 thomas 	repo = calloc(1, sizeof(*repo));
810 3efd8e31 2022-10-23 thomas 	if (repo == NULL)
811 3efd8e31 2022-10-23 thomas 		fatalx("%s: calloc", __func__);
812 3efd8e31 2022-10-23 thomas 
813 729a7e24 2022-11-17 thomas 	STAILQ_INIT(&repo->rules);
814 729a7e24 2022-11-17 thomas 
815 3efd8e31 2022-10-23 thomas 	if (strlcpy(repo->name, name, sizeof(repo->name)) >=
816 3efd8e31 2022-10-23 thomas 	    sizeof(repo->name))
817 3efd8e31 2022-10-23 thomas 		fatalx("%s: strlcpy", __func__);
818 3efd8e31 2022-10-23 thomas 
819 3efd8e31 2022-10-23 thomas 	TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
820 3efd8e31 2022-10-23 thomas 	gotd->nrepos++;
821 3efd8e31 2022-10-23 thomas 
822 3efd8e31 2022-10-23 thomas 	return repo;
823 3efd8e31 2022-10-23 thomas };
824 729a7e24 2022-11-17 thomas 
825 729a7e24 2022-11-17 thomas static void
826 729a7e24 2022-11-17 thomas conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
827 729a7e24 2022-11-17 thomas     int authorization, char *identifier)
828 729a7e24 2022-11-17 thomas {
829 729a7e24 2022-11-17 thomas 	struct gotd_access_rule *rule;
830 729a7e24 2022-11-17 thomas 
831 729a7e24 2022-11-17 thomas 	rule = calloc(1, sizeof(*rule));
832 729a7e24 2022-11-17 thomas 	if (rule == NULL)
833 729a7e24 2022-11-17 thomas 		fatal("calloc");
834 3efd8e31 2022-10-23 thomas 
835 729a7e24 2022-11-17 thomas 	rule->access = access;
836 729a7e24 2022-11-17 thomas 	rule->authorization = authorization;
837 729a7e24 2022-11-17 thomas 	rule->identifier = identifier;
838 729a7e24 2022-11-17 thomas 
839 729a7e24 2022-11-17 thomas 	STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
840 729a7e24 2022-11-17 thomas }
841 729a7e24 2022-11-17 thomas 
842 3efd8e31 2022-10-23 thomas int
843 3efd8e31 2022-10-23 thomas symset(const char *nam, const char *val, int persist)
844 3efd8e31 2022-10-23 thomas {
845 3efd8e31 2022-10-23 thomas 	struct sym *sym;
846 3efd8e31 2022-10-23 thomas 
847 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(sym, &symhead, entry) {
848 3efd8e31 2022-10-23 thomas 		if (strcmp(nam, sym->nam) == 0)
849 3efd8e31 2022-10-23 thomas 			break;
850 3efd8e31 2022-10-23 thomas 	}
851 3efd8e31 2022-10-23 thomas 
852 3efd8e31 2022-10-23 thomas 	if (sym != NULL) {
853 3efd8e31 2022-10-23 thomas 		if (sym->persist == 1)
854 3efd8e31 2022-10-23 thomas 			return (0);
855 3efd8e31 2022-10-23 thomas 		else {
856 3efd8e31 2022-10-23 thomas 			free(sym->nam);
857 3efd8e31 2022-10-23 thomas 			free(sym->val);
858 3efd8e31 2022-10-23 thomas 			TAILQ_REMOVE(&symhead, sym, entry);
859 3efd8e31 2022-10-23 thomas 			free(sym);
860 3efd8e31 2022-10-23 thomas 		}
861 3efd8e31 2022-10-23 thomas 	}
862 3efd8e31 2022-10-23 thomas 	sym = calloc(1, sizeof(*sym));
863 3efd8e31 2022-10-23 thomas 	if (sym == NULL)
864 3efd8e31 2022-10-23 thomas 		return (-1);
865 3efd8e31 2022-10-23 thomas 
866 3efd8e31 2022-10-23 thomas 	sym->nam = strdup(nam);
867 3efd8e31 2022-10-23 thomas 	if (sym->nam == NULL) {
868 3efd8e31 2022-10-23 thomas 		free(sym);
869 3efd8e31 2022-10-23 thomas 		return (-1);
870 3efd8e31 2022-10-23 thomas 	}
871 3efd8e31 2022-10-23 thomas 	sym->val = strdup(val);
872 3efd8e31 2022-10-23 thomas 	if (sym->val == NULL) {
873 3efd8e31 2022-10-23 thomas 		free(sym->nam);
874 3efd8e31 2022-10-23 thomas 		free(sym);
875 3efd8e31 2022-10-23 thomas 		return (-1);
876 3efd8e31 2022-10-23 thomas 	}
877 3efd8e31 2022-10-23 thomas 	sym->used = 0;
878 3efd8e31 2022-10-23 thomas 	sym->persist = persist;
879 3efd8e31 2022-10-23 thomas 	TAILQ_INSERT_TAIL(&symhead, sym, entry);
880 3efd8e31 2022-10-23 thomas 	return (0);
881 3efd8e31 2022-10-23 thomas }
882 3efd8e31 2022-10-23 thomas 
883 3efd8e31 2022-10-23 thomas char *
884 3efd8e31 2022-10-23 thomas symget(const char *nam)
885 3efd8e31 2022-10-23 thomas {
886 3efd8e31 2022-10-23 thomas 	struct sym *sym;
887 3efd8e31 2022-10-23 thomas 
888 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(sym, &symhead, entry) {
889 3efd8e31 2022-10-23 thomas 		if (strcmp(nam, sym->nam) == 0) {
890 3efd8e31 2022-10-23 thomas 			sym->used = 1;
891 3efd8e31 2022-10-23 thomas 			return (sym->val);
892 3efd8e31 2022-10-23 thomas 		}
893 3efd8e31 2022-10-23 thomas 	}
894 3efd8e31 2022-10-23 thomas 	return (NULL);
895 3efd8e31 2022-10-23 thomas }