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4 nishi 1 
/* $Id: config.c 161 2024-09-25 13:35:04Z nishi $ */
2 
 
16 nishi 3 
#define SOURCE
4 
 
4 nishi 5 
#include "tw_config.h"
17 nishi 6 
#include "tw_module.h"
4 nishi 7 
 
8 
#include <stdio.h>
7 nishi 9 
#include <stdint.h>
4 nishi 10 
#include <stdlib.h>
11 
#include <string.h>
12 nishi 12 
#include <unistd.h>
4 nishi 13 
 
20 nishi 14 
#ifdef __MINGW32__
15 
#include <winsock2.h>
16 
#endif
17 
 
4 nishi 18 
#include <cm_string.h>
19 
#include <cm_log.h>
20 
 
6 nishi 21 
struct tw_config config;
22 
 
12 nishi 23 
struct tw_config_entry* tw_vhost_match(const char* name, int port) {
24 
	int i;
25 
	for(i = 0; i < config.vhost_count; i++) {
13 nishi 26 
		if(strcmp(config.vhosts[i].name, name) == 0 && (config.vhosts[i].port == -1 ? 1 : config.vhosts[i].port == port)) {
12 nishi 27 
			return &config.vhosts[i];
28 
		}
29 
	}
30 
	return &config.root;
31 
}
32 
 
22 nishi 33 
bool tw_permission_allowed(const char* path, SOCKADDR addr, struct tw_http_request req, struct tw_config_entry* vhost) {
21 nishi 34 
	int i;
35 
	bool found = false;
36 
	bool pathstart = false;
37 
	bool perm = false;
38 
again:
22 nishi 39 
	for(i = 0; i < vhost->dir_count; i++) {
21 nishi 40 
		struct tw_dir_entry* e = &vhost->dirs[i];
41 
		pathstart = false;
22 nishi 42 
		if(strlen(path) >= strlen(e->dir)) {
21 nishi 43 
			pathstart = true;
44 
			int j;
22 nishi 45 
			for(j = 0; path[j] != 0 && e->dir[j] != 0; j++) {
46 
				if(path[j] != e->dir[j]) {
21 nishi 47 
					pathstart = false;
48 
					break;
49 
				}
50 
			}
51 
		}
52 
		char* noslash = cm_strdup(e->dir);
53 
		noslash[strlen(noslash) - 1] = 0;
22 nishi 54 
		if(strcmp(e->dir, path) == 0 || strcmp(noslash, path) == 0 || pathstart) {
21 nishi 55 
			found = true;
22 nishi 56 
			if(strcmp(e->name, "all") == 0) {
21 nishi 57 
				perm = e->type == TW_DIR_ALLOW;
58 
			}
59 
		}
60 
		free(noslash);
61 
	}
22 nishi 62 
	if(!found && vhost != &config.root) {
21 nishi 63 
		vhost = &config.root;
64 
		goto again;
65 
	}
66 
	return perm;
67 
}
68 
 
7 nishi 69 
void tw_config_init(void) {
70 
	int i;
71 
	for(i = 0; i < MAX_PORTS + 1; i++) {
72 
		config.ports[i] = -1;
73 
	}
12 nishi 74 
	for(i = 0; i < MAX_VHOSTS; i++) {
156 nishi 75 
#ifndef NO_SSL
12 nishi 76 
		config.vhosts[i].sslkey = NULL;
77 
		config.vhosts[i].sslcert = NULL;
156 nishi 78 
#endif
19 nishi 79 
		config.vhosts[i].root = NULL;
156 nishi 80 
#ifdef HAS_CHROOT
81 
		config.vhosts[i].chroot_path = NULL;
82 
#endif
12 nishi 83 
	}
156 nishi 84 
#ifndef NO_SSL
12 nishi 85 
	config.root.sslkey = NULL;
86 
	config.root.sslcert = NULL;
156 nishi 87 
#endif
19 nishi 88 
	config.root.root = NULL;
21 nishi 89 
	config.root.mime_count = 0;
90 
	config.root.dir_count = 0;
22 nishi 91 
	config.root.icon_count = 0;
24 nishi 92 
	config.root.index_count = 0;
33 nishi 93 
	config.root.readme_count = 0;
123 nishi 94 
	config.root.hideport = 0;
156 nishi 95 
#ifdef HAS_CHROOT
96 
	config.root.chroot_path = NULL;
97 
#endif
12 nishi 98 
	config.vhost_count = 0;
18 nishi 99 
	config.module_count = 0;
100 
	config.extension = NULL;
17 nishi 101 
	config.server_root = cm_strdup(PREFIX);
128 nishi 102 
	config.server_admin = cm_strdup(SERVER_ADMIN);
156 nishi 103 
	config.defined[0] = NULL;
12 nishi 104 
	gethostname(config.hostname, 1024);
161 nishi 105 
#ifdef HAS_CHROOT
106 
	tw_add_define("HAS_CHROOT");
107 
#endif
7 nishi 108 
}
6 nishi 109 
 
110 
int tw_config_read(const char* path) {
4 nishi 111 
	cm_log("Config", "Reading %s", path);
112 
	char cbuf[2];
113 
	cbuf[1] = 0;
6 nishi 114 
	int ln = 0;
156 nishi 115 
	int ifbr = 0;
116 
	int ignore = -1;
4 nishi 117 
	FILE* f = fopen(path, "r");
6 nishi 118 
	if(f != NULL) {
4 nishi 119 
		char* line = malloc(1);
120 
		line[0] = 0;
6 nishi 121 
		int stop = 0;
12 nishi 122 
		struct tw_config_entry* current = &config.root;
6 nishi 123 
		char* vhost = NULL;
21 nishi 124 
		char* dir = NULL;
6 nishi 125 
		while(stop == 0) {
4 nishi 126 
			int c = fread(cbuf, 1, 1, f);
6 nishi 127 
			if(cbuf[0] == '\n' || c <= 0) {
128 
				ln++;
4 nishi 129 
				char* l = cm_trim(line);
6 nishi 130 
				if(strlen(l) > 0 && l[0] != '#') {
5 nishi 131 
					char** r = cm_split(l, " \t");
132 
					int i;
156 nishi 133 
					if(ignore != -1 && ifbr >= ignore) {
134 
						if(cm_strcaseequ(r[0], "EndIf")) ifbr--;
135 
						if(ifbr == 0) {
136 
							ignore = -1;
137 
						}
138 
					} else if(cm_strcaseequ(r[0], "Include") || cm_strcaseequ(r[0], "IncludeOptional")) {
6 nishi 139 
						for(i = 1; r[i] != NULL; i++) {
140 
							if(tw_config_read(r[i]) != 0 && cm_strcaseequ(r[0], "Include")) {
141 
								stop = 1;
142 
								break;
5 nishi 143 
							}
144 
						}
156 nishi 145 
					} else if(cm_strcaseequ(r[0], "Define")) {
146 
						if(r[1] == NULL) {
147 
							cm_log("Config", "Missing name at line %d", ln);
148 
							stop = 1;
149 
						} else {
150 
							tw_add_define(r[1]);
151 
						}
152 
					} else if(cm_strcaseequ(r[0], "Undefine")) {
153 
						if(r[1] == NULL) {
154 
							cm_log("Config", "Missing name at line %d", ln);
155 
							stop = 1;
156 
						} else {
157 
							tw_delete_define(r[1]);
158 
						}
21 nishi 159 
					} else if(cm_strcaseequ(r[0], "BeginDirectory")) {
160 
						if(dir != NULL) {
161 
							cm_log("Config", "Already in directory section at line %d", ln);
162 
							stop = 1;
163 
						} else {
164 
							if(r[1] == NULL) {
165 
								cm_log("Config", "Missing directory at line %d", ln);
166 
								stop = 1;
167 
							} else {
168 
								dir = cm_strcat(r[1], r[1][strlen(r[1]) - 1] == '/' ? "" : "/");
169 
							}
170 
						}
171 
					} else if(cm_strcaseequ(r[0], "EndDirectory")) {
172 
						if(dir == NULL) {
173 
							cm_log("Config", "Not in directory section at line %d", ln);
174 
							stop = 1;
175 
						} else {
176 
							free(dir);
177 
							dir = NULL;
178 
						}
179 
					} else if(cm_strcaseequ(r[0], "Allow")) {
180 
						if(dir == NULL) {
181 
							cm_log("Config", "Not in directory section at line %d", ln);
182 
							stop = 1;
183 
						} else {
184 
							if(r[1] == NULL) {
185 
								cm_log("Config", "Missing argument at line %d", ln);
186 
								stop = 1;
187 
							} else {
188 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
189 
								e->name = cm_strdup(r[1]);
190 
								e->dir = cm_strdup(dir);
191 
								e->type = TW_DIR_ALLOW;
192 
							}
193 
						}
194 
					} else if(cm_strcaseequ(r[0], "Deny")) {
195 
						if(dir == NULL) {
196 
							cm_log("Config", "Not in directory section at line %d", ln);
197 
							stop = 1;
198 
						} else {
199 
							if(r[1] == NULL) {
200 
								cm_log("Config", "Missing argument at line %d", ln);
201 
								stop = 1;
202 
							} else {
203 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
204 
								e->name = cm_strdup(r[1]);
205 
								e->dir = cm_strdup(dir);
206 
								e->type = TW_DIR_DENY;
207 
							}
208 
						}
6 nishi 209 
					} else if(cm_strcaseequ(r[0], "BeginVirtualHost")) {
210 
						if(vhost != NULL) {
12 nishi 211 
							cm_log("Config", "Already in virtual host section at line %d", ln);
6 nishi 212 
							stop = 1;
213 
						} else {
214 
							if(r[1] == NULL) {
12 nishi 215 
								cm_log("Config", "Missing virtual host at line %d", ln);
6 nishi 216 
								stop = 1;
217 
							} else {
218 
								vhost = cm_strdup(r[1]);
12 nishi 219 
								current = &config.vhosts[config.vhost_count++];
21 nishi 220 
								current->dir_count = 0;
221 
								current->mime_count = 0;
22 nishi 222 
								current->icon_count = 0;
24 nishi 223 
								current->index_count = 0;
33 nishi 224 
								current->readme_count = 0;
123 nishi 225 
								current->hideport = -1;
12 nishi 226 
								int i;
227 
								current->name = cm_strdup(vhost);
13 nishi 228 
								current->port = -1;
12 nishi 229 
								for(i = 0; vhost[i] != 0; i++) {
230 
									if(vhost[i] == ':') {
231 
										current->name[i] = 0;
232 
										current->port = atoi(current->name + i + 1);
233 
										break;
234 
									}
235 
								}
6 nishi 236 
							}
237 
						}
238 
					} else if(cm_strcaseequ(r[0], "EndVirtualHost")) {
239 
						if(vhost == NULL) {
12 nishi 240 
							cm_log("Config", "Not in virtual host section at line %d", ln);
6 nishi 241 
							stop = 1;
242 
						} else {
243 
							free(vhost);
244 
							vhost = NULL;
12 nishi 245 
							current = &config.root;
6 nishi 246 
						}
7 nishi 247 
					} else if(cm_strcaseequ(r[0], "Listen") || cm_strcaseequ(r[0], "ListenSSL")) {
248 
						for(i = 1; r[i] != NULL; i++) {
249 
							uint64_t port = atoi(r[i]);
250 
							cm_log("Config", "Going to listen at port %d%s", (int)port, cm_strcaseequ(r[0], "ListenSSL") ? " with SSL" : "");
251 
							if(cm_strcaseequ(r[0], "ListenSSL")) port |= (1ULL << 32);
252 
							int j;
253 
							for(j = 0; config.ports[j] != -1; j++)
254 
								;
255 
							config.ports[j] = port;
256 
						}
123 nishi 257 
					} else if(cm_strcaseequ(r[0], "HidePort")) {
258 
						current->hideport = 1;
259 
					} else if(cm_strcaseequ(r[0], "ShowPort")) {
260 
						current->hideport = 0;
156 nishi 261 
#ifndef NO_SSL
12 nishi 262 
					} else if(cm_strcaseequ(r[0], "SSLKey")) {
263 
						if(r[1] == NULL) {
264 
							cm_log("Config", "Missing path at line %d", ln);
265 
							stop = 1;
266 
						} else {
267 
							if(current->sslkey != NULL) free(current->sslkey);
268 
							current->sslkey = cm_strdup(r[1]);
269 
						}
270 
					} else if(cm_strcaseequ(r[0], "SSLCertificate")) {
271 
						if(r[1] == NULL) {
272 
							cm_log("Config", "Missing path at line %d", ln);
273 
							stop = 1;
274 
						} else {
275 
							if(current->sslcert != NULL) free(current->sslcert);
276 
							current->sslcert = cm_strdup(r[1]);
277 
						}
156 nishi 278 
#endif
161 nishi 279 
#ifdef HAS_CHROOT
280 
					} else if(cm_strcaseequ(r[0], "ChrootDirectory")) {
281 
						if(r[1] == NULL) {
282 
							cm_log("Config", "Missing path at line %d", ln);
283 
							stop = 1;
284 
						} else {
285 
							if(current->chroot_path != NULL) free(current->chroot_path);
286 
							current->chroot_path = cm_strdup(r[1]);
287 
						}
288 
#endif
156 nishi 289 
					} else if(cm_strcaseequ(r[0], "ForceLog")) {
290 
						if(r[1] == NULL) {
291 
							cm_log("Config", "Missing log at line %d", ln);
292 
							stop = 1;
293 
						} else {
294 
							cm_force_log(r[1]);
295 
						}
296 
					} else if(cm_strcaseequ(r[0], "EndIf")) {
297 
						if(ifbr == 0) {
298 
							cm_log("Config", "Missing BeginIf at line %d", ln);
299 
							stop = 1;
300 
						}
301 
						ifbr--;
302 
					} else if(cm_strcaseequ(r[0], "BeginIf") || cm_strcaseequ(r[0], "BeginIfNot")) {
303 
						if(r[1] == NULL) {
304 
							cm_log("Config", "Missing condition type at line %d", ln);
305 
						} else {
306 
							ifbr++;
307 
							bool ign = false;
308 
							if(cm_strcaseequ(r[1], "False")) {
309 
								ign = true;
310 
							} else if(cm_strcaseequ(r[1], "True")) {
311 
							} else if(cm_strcaseequ(r[1], "Defined")) {
312 
								if(r[2] == NULL) {
313 
									cm_log("Config", "Missing name at line %d", ln);
314 
									stop = 1;
315 
								} else {
316 
									int i;
317 
									bool fndit = false;
318 
									for(i = 0; config.defined[i] != NULL; i++) {
319 
										if(strcmp(config.defined[i], r[2]) == 0) {
320 
											fndit = true;
321 
											break;
322 
										}
323 
									}
324 
									if(!fndit) {
325 
										ign = true;
326 
									}
327 
								}
328 
							} else {
329 
								cm_log("Config", "Unknown condition type at line %d", ln);
330 
								stop = 1;
331 
							}
332 
							if(cm_strcaseequ(r[0], "BeginIfNot")) ign = !ign;
333 
							if(ign) {
334 
								ignore = ifbr - 1;
335 
							}
336 
						}
61 nishi 337 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
338 
						if(r[1] == NULL) {
339 
							cm_log("Config", "Missing path at line %d", ln);
340 
							stop = 1;
341 
						} else {
342 
							chdir(r[1]);
127 nishi 343 
							free(config.server_root);
344 
							config.server_root = cm_strdup(r[1]);
61 nishi 345 
						}
128 nishi 346 
					} else if(cm_strcaseequ(r[0], "ServerAdmin")) {
347 
						if(r[1] == NULL) {
348 
							cm_log("Config", "Missing email at line %d", ln);
349 
							stop = 1;
350 
						} else {
351 
							free(config.server_admin);
352 
							config.server_admin = cm_strdup(r[1]);
353 
						}
19 nishi 354 
					} else if(cm_strcaseequ(r[0], "DocumentRoot")) {
355 
						if(r[1] == NULL) {
356 
							cm_log("Config", "Missing path at line %d", ln);
357 
							stop = 1;
358 
						} else {
359 
							if(current->root != NULL) free(current->root);
21 nishi 360 
							current->root = cm_strdup(strcmp(r[1], "/") == 0 ? "" : r[1]);
19 nishi 361 
						}
21 nishi 362 
					} else if(cm_strcaseequ(r[0], "MIMEType")) {
363 
						if(r[1] == NULL) {
364 
							cm_log("Config", "Missing extension at line %d", ln);
365 
							stop = 1;
22 nishi 366 
						} else if(r[2] == NULL) {
21 nishi 367 
							cm_log("Config", "Missing MIME at line %d", ln);
368 
							stop = 1;
369 
						} else {
370 
							struct tw_mime_entry* e = &current->mimes[current->mime_count++];
371 
							e->ext = cm_strdup(r[1]);
372 
							e->mime = cm_strdup(r[2]);
373 
						}
22 nishi 374 
					} else if(cm_strcaseequ(r[0], "Icon")) {
375 
						if(r[1] == NULL) {
376 
							cm_log("Config", "Missing MIME at line %d", ln);
377 
							stop = 1;
378 
						} else if(r[2] == NULL) {
379 
							cm_log("Config", "Missing path at line %d", ln);
380 
							stop = 1;
381 
						} else {
382 
							struct tw_icon_entry* e = &current->icons[current->icon_count++];
383 
							e->mime = cm_strdup(r[1]);
384 
							e->icon = cm_strdup(r[2]);
385 
						}
17 nishi 386 
					} else if(cm_strcaseequ(r[0], "LoadModule")) {
387 
						for(i = 1; r[i] != NULL; i++) {
388 
							void* mod = tw_module_load(r[i]);
389 
							if(mod != NULL) {
18 nishi 390 
								config.modules[config.module_count++] = mod;
17 nishi 391 
								if(tw_module_init(mod) != 0) {
392 
									stop = 1;
393 
									break;
394 
								}
395 
							} else {
127 nishi 396 
								cm_log("Config", "Could not load the module at line %d", ln);
17 nishi 397 
								stop = 1;
398 
								break;
399 
							}
400 
						}
24 nishi 401 
					} else if(cm_strcaseequ(r[0], "DirectoryIndex")) {
402 
						for(i = 1; r[i] != NULL; i++) {
403 
							current->indexes[current->index_count++] = cm_strdup(r[i]);
404 
						}
33 nishi 405 
					} else if(cm_strcaseequ(r[0], "Readme")) {
406 
						for(i = 1; r[i] != NULL; i++) {
407 
							current->readmes[current->readme_count++] = cm_strdup(r[i]);
408 
						}
6 nishi 409 
					} else {
39 nishi 410 
						stop = 1;
6 nishi 411 
						if(r[0] != NULL) {
39 nishi 412 
							int argc;
413 
							for(argc = 0; r[argc] != NULL; argc++)
414 
								;
415 
							stop = 0;
416 
							int i;
417 
							bool called = false;
418 
							struct tw_tool tools;
419 
							tw_init_tools(&tools);
420 
							for(i = 0; i < config.module_count; i++) {
421 
								tw_mod_config_t mod_config = (tw_mod_config_t)tw_module_symbol(config.modules[i], "mod_config");
422 
								int resp;
423 
								if(mod_config != NULL && (resp = mod_config(&tools, r, argc)) == TW_CONFIG_PARSED) {
424 
									called = true;
425 
									break;
426 
								}
427 
								if(resp == TW_CONFIG_ERROR) {
428 
									stop = 1;
429 
									called = true;
430 
									break;
431 
								}
432 
							}
433 
							if(!called) {
434 
								cm_log("Config", "Unknown directive `%s' at line %d", r[0], ln);
435 
								stop = 1;
436 
							}
6 nishi 437 
						}
5 nishi 438 
					}
439 
					for(i = 0; r[i] != NULL; i++) free(r[i]);
440 
					free(r);
4 nishi 441 
				}
442 
				free(l);
443 
				free(line);
444 
				line = malloc(1);
445 
				line[0] = 0;
446 
				if(c <= 0) break;
6 nishi 447 
			} else if(cbuf[0] != '\r') {
4 nishi 448 
				char* tmp = line;
449 
				line = cm_strcat(tmp, cbuf);
450 
				free(tmp);
451 
			}
452 
		}
453 
		free(line);
454 
		fclose(f);
6 nishi 455 
		return stop;
456 
	} else {
5 nishi 457 
		cm_log("Config", "Could not open the file");
4 nishi 458 
		return 1;
459 
	}
460 
}