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