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4 nishi 1 
/* $Id: config.c 176 2024-09-26 21:28:41Z 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
174 nishi 108 
#ifndef NO_SSL
109 
	tw_add_define("HAS_SSL");
110 
#endif
7 nishi 111 
}
6 nishi 112 
 
113 
int tw_config_read(const char* path) {
4 nishi 114 
	cm_log("Config", "Reading %s", path);
115 
	char cbuf[2];
116 
	cbuf[1] = 0;
6 nishi 117 
	int ln = 0;
156 nishi 118 
	int ifbr = 0;
119 
	int ignore = -1;
4 nishi 120 
	FILE* f = fopen(path, "r");
6 nishi 121 
	if(f != NULL) {
4 nishi 122 
		char* line = malloc(1);
123 
		line[0] = 0;
6 nishi 124 
		int stop = 0;
12 nishi 125 
		struct tw_config_entry* current = &config.root;
6 nishi 126 
		char* vhost = NULL;
21 nishi 127 
		char* dir = NULL;
6 nishi 128 
		while(stop == 0) {
4 nishi 129 
			int c = fread(cbuf, 1, 1, f);
6 nishi 130 
			if(cbuf[0] == '\n' || c <= 0) {
131 
				ln++;
4 nishi 132 
				char* l = cm_trim(line);
6 nishi 133 
				if(strlen(l) > 0 && l[0] != '#') {
5 nishi 134 
					char** r = cm_split(l, " \t");
135 
					int i;
156 nishi 136 
					if(ignore != -1 && ifbr >= ignore) {
137 
						if(cm_strcaseequ(r[0], "EndIf")) ifbr--;
138 
						if(ifbr == 0) {
139 
							ignore = -1;
140 
						}
141 
					} else if(cm_strcaseequ(r[0], "Include") || cm_strcaseequ(r[0], "IncludeOptional")) {
6 nishi 142 
						for(i = 1; r[i] != NULL; i++) {
143 
							if(tw_config_read(r[i]) != 0 && cm_strcaseequ(r[0], "Include")) {
144 
								stop = 1;
145 
								break;
5 nishi 146 
							}
147 
						}
156 nishi 148 
					} else if(cm_strcaseequ(r[0], "Define")) {
149 
						if(r[1] == NULL) {
150 
							cm_log("Config", "Missing name at line %d", ln);
151 
							stop = 1;
152 
						} else {
153 
							tw_add_define(r[1]);
154 
						}
155 
					} else if(cm_strcaseequ(r[0], "Undefine")) {
156 
						if(r[1] == NULL) {
157 
							cm_log("Config", "Missing name at line %d", ln);
158 
							stop = 1;
159 
						} else {
160 
							tw_delete_define(r[1]);
161 
						}
21 nishi 162 
					} else if(cm_strcaseequ(r[0], "BeginDirectory")) {
163 
						if(dir != NULL) {
164 
							cm_log("Config", "Already in directory section at line %d", ln);
165 
							stop = 1;
166 
						} else {
167 
							if(r[1] == NULL) {
168 
								cm_log("Config", "Missing directory at line %d", ln);
169 
								stop = 1;
170 
							} else {
171 
								dir = cm_strcat(r[1], r[1][strlen(r[1]) - 1] == '/' ? "" : "/");
172 
							}
173 
						}
174 
					} else if(cm_strcaseequ(r[0], "EndDirectory")) {
175 
						if(dir == NULL) {
176 
							cm_log("Config", "Not in directory section at line %d", ln);
177 
							stop = 1;
178 
						} else {
179 
							free(dir);
180 
							dir = NULL;
181 
						}
182 
					} else if(cm_strcaseequ(r[0], "Allow")) {
183 
						if(dir == NULL) {
184 
							cm_log("Config", "Not in directory section at line %d", ln);
185 
							stop = 1;
186 
						} else {
187 
							if(r[1] == NULL) {
188 
								cm_log("Config", "Missing argument at line %d", ln);
189 
								stop = 1;
190 
							} else {
191 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
192 
								e->name = cm_strdup(r[1]);
193 
								e->dir = cm_strdup(dir);
194 
								e->type = TW_DIR_ALLOW;
195 
							}
196 
						}
197 
					} else if(cm_strcaseequ(r[0], "Deny")) {
198 
						if(dir == NULL) {
199 
							cm_log("Config", "Not in directory section at line %d", ln);
200 
							stop = 1;
201 
						} else {
202 
							if(r[1] == NULL) {
203 
								cm_log("Config", "Missing argument at line %d", ln);
204 
								stop = 1;
205 
							} else {
206 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
207 
								e->name = cm_strdup(r[1]);
208 
								e->dir = cm_strdup(dir);
209 
								e->type = TW_DIR_DENY;
210 
							}
211 
						}
6 nishi 212 
					} else if(cm_strcaseequ(r[0], "BeginVirtualHost")) {
213 
						if(vhost != NULL) {
12 nishi 214 
							cm_log("Config", "Already in virtual host section at line %d", ln);
6 nishi 215 
							stop = 1;
216 
						} else {
217 
							if(r[1] == NULL) {
12 nishi 218 
								cm_log("Config", "Missing virtual host at line %d", ln);
6 nishi 219 
								stop = 1;
220 
							} else {
221 
								vhost = cm_strdup(r[1]);
12 nishi 222 
								current = &config.vhosts[config.vhost_count++];
21 nishi 223 
								current->dir_count = 0;
224 
								current->mime_count = 0;
22 nishi 225 
								current->icon_count = 0;
24 nishi 226 
								current->index_count = 0;
33 nishi 227 
								current->readme_count = 0;
123 nishi 228 
								current->hideport = -1;
12 nishi 229 
								int i;
230 
								current->name = cm_strdup(vhost);
13 nishi 231 
								current->port = -1;
12 nishi 232 
								for(i = 0; vhost[i] != 0; i++) {
233 
									if(vhost[i] == ':') {
234 
										current->name[i] = 0;
235 
										current->port = atoi(current->name + i + 1);
236 
										break;
237 
									}
238 
								}
6 nishi 239 
							}
240 
						}
241 
					} else if(cm_strcaseequ(r[0], "EndVirtualHost")) {
242 
						if(vhost == NULL) {
12 nishi 243 
							cm_log("Config", "Not in virtual host section at line %d", ln);
6 nishi 244 
							stop = 1;
245 
						} else {
246 
							free(vhost);
247 
							vhost = NULL;
12 nishi 248 
							current = &config.root;
6 nishi 249 
						}
174 nishi 250 
					} else if(cm_strcaseequ(r[0], "Listen")
251 
#ifndef NO_SSL
252 
						  || cm_strcaseequ(r[0], "ListenSSL")
253 
#endif
254 
					) {
7 nishi 255 
						for(i = 1; r[i] != NULL; i++) {
256 
							uint64_t port = atoi(r[i]);
257 
							cm_log("Config", "Going to listen at port %d%s", (int)port, cm_strcaseequ(r[0], "ListenSSL") ? " with SSL" : "");
258 
							if(cm_strcaseequ(r[0], "ListenSSL")) port |= (1ULL << 32);
259 
							int j;
260 
							for(j = 0; config.ports[j] != -1; j++)
261 
								;
262 
							config.ports[j] = port;
263 
						}
123 nishi 264 
					} else if(cm_strcaseequ(r[0], "HidePort")) {
265 
						current->hideport = 1;
266 
					} else if(cm_strcaseequ(r[0], "ShowPort")) {
267 
						current->hideport = 0;
156 nishi 268 
#ifndef NO_SSL
12 nishi 269 
					} else if(cm_strcaseequ(r[0], "SSLKey")) {
270 
						if(r[1] == NULL) {
271 
							cm_log("Config", "Missing path at line %d", ln);
272 
							stop = 1;
273 
						} else {
274 
							if(current->sslkey != NULL) free(current->sslkey);
275 
							current->sslkey = cm_strdup(r[1]);
276 
						}
277 
					} else if(cm_strcaseequ(r[0], "SSLCertificate")) {
278 
						if(r[1] == NULL) {
279 
							cm_log("Config", "Missing path at line %d", ln);
280 
							stop = 1;
281 
						} else {
282 
							if(current->sslcert != NULL) free(current->sslcert);
283 
							current->sslcert = cm_strdup(r[1]);
284 
						}
156 nishi 285 
#endif
161 nishi 286 
#ifdef HAS_CHROOT
287 
					} else if(cm_strcaseequ(r[0], "ChrootDirectory")) {
288 
						if(r[1] == NULL) {
289 
							cm_log("Config", "Missing path at line %d", ln);
290 
							stop = 1;
291 
						} else {
292 
							if(current->chroot_path != NULL) free(current->chroot_path);
293 
							current->chroot_path = cm_strdup(r[1]);
294 
						}
295 
#endif
156 nishi 296 
					} else if(cm_strcaseequ(r[0], "ForceLog")) {
297 
						if(r[1] == NULL) {
298 
							cm_log("Config", "Missing log at line %d", ln);
299 
							stop = 1;
300 
						} else {
301 
							cm_force_log(r[1]);
302 
						}
303 
					} else if(cm_strcaseequ(r[0], "EndIf")) {
304 
						if(ifbr == 0) {
305 
							cm_log("Config", "Missing BeginIf at line %d", ln);
306 
							stop = 1;
307 
						}
308 
						ifbr--;
309 
					} else if(cm_strcaseequ(r[0], "BeginIf") || cm_strcaseequ(r[0], "BeginIfNot")) {
310 
						if(r[1] == NULL) {
311 
							cm_log("Config", "Missing condition type at line %d", ln);
312 
						} else {
313 
							ifbr++;
314 
							bool ign = false;
315 
							if(cm_strcaseequ(r[1], "False")) {
316 
								ign = true;
317 
							} else if(cm_strcaseequ(r[1], "True")) {
318 
							} else if(cm_strcaseequ(r[1], "Defined")) {
319 
								if(r[2] == NULL) {
320 
									cm_log("Config", "Missing name at line %d", ln);
321 
									stop = 1;
322 
								} else {
323 
									int i;
324 
									bool fndit = false;
325 
									for(i = 0; config.defined[i] != NULL; i++) {
326 
										if(strcmp(config.defined[i], r[2]) == 0) {
327 
											fndit = true;
328 
											break;
329 
										}
330 
									}
331 
									if(!fndit) {
332 
										ign = true;
333 
									}
334 
								}
335 
							} else {
336 
								cm_log("Config", "Unknown condition type at line %d", ln);
337 
								stop = 1;
338 
							}
339 
							if(cm_strcaseequ(r[0], "BeginIfNot")) ign = !ign;
340 
							if(ign) {
341 
								ignore = ifbr - 1;
342 
							}
343 
						}
61 nishi 344 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
345 
						if(r[1] == NULL) {
346 
							cm_log("Config", "Missing path at line %d", ln);
347 
							stop = 1;
348 
						} else {
349 
							chdir(r[1]);
127 nishi 350 
							free(config.server_root);
351 
							config.server_root = cm_strdup(r[1]);
61 nishi 352 
						}
128 nishi 353 
					} else if(cm_strcaseequ(r[0], "ServerAdmin")) {
354 
						if(r[1] == NULL) {
355 
							cm_log("Config", "Missing email at line %d", ln);
356 
							stop = 1;
357 
						} else {
358 
							free(config.server_admin);
359 
							config.server_admin = cm_strdup(r[1]);
360 
						}
19 nishi 361 
					} else if(cm_strcaseequ(r[0], "DocumentRoot")) {
362 
						if(r[1] == NULL) {
363 
							cm_log("Config", "Missing path at line %d", ln);
364 
							stop = 1;
365 
						} else {
366 
							if(current->root != NULL) free(current->root);
21 nishi 367 
							current->root = cm_strdup(strcmp(r[1], "/") == 0 ? "" : r[1]);
19 nishi 368 
						}
21 nishi 369 
					} else if(cm_strcaseequ(r[0], "MIMEType")) {
370 
						if(r[1] == NULL) {
371 
							cm_log("Config", "Missing extension at line %d", ln);
372 
							stop = 1;
22 nishi 373 
						} else if(r[2] == NULL) {
21 nishi 374 
							cm_log("Config", "Missing MIME at line %d", ln);
375 
							stop = 1;
376 
						} else {
377 
							struct tw_mime_entry* e = &current->mimes[current->mime_count++];
378 
							e->ext = cm_strdup(r[1]);
379 
							e->mime = cm_strdup(r[2]);
380 
						}
22 nishi 381 
					} else if(cm_strcaseequ(r[0], "Icon")) {
382 
						if(r[1] == NULL) {
383 
							cm_log("Config", "Missing MIME at line %d", ln);
384 
							stop = 1;
385 
						} else if(r[2] == NULL) {
386 
							cm_log("Config", "Missing path at line %d", ln);
387 
							stop = 1;
388 
						} else {
389 
							struct tw_icon_entry* e = &current->icons[current->icon_count++];
390 
							e->mime = cm_strdup(r[1]);
391 
							e->icon = cm_strdup(r[2]);
392 
						}
17 nishi 393 
					} else if(cm_strcaseequ(r[0], "LoadModule")) {
394 
						for(i = 1; r[i] != NULL; i++) {
395 
							void* mod = tw_module_load(r[i]);
396 
							if(mod != NULL) {
18 nishi 397 
								config.modules[config.module_count++] = mod;
17 nishi 398 
								if(tw_module_init(mod) != 0) {
399 
									stop = 1;
400 
									break;
401 
								}
402 
							} else {
127 nishi 403 
								cm_log("Config", "Could not load the module at line %d", ln);
17 nishi 404 
								stop = 1;
405 
								break;
406 
							}
407 
						}
24 nishi 408 
					} else if(cm_strcaseequ(r[0], "DirectoryIndex")) {
409 
						for(i = 1; r[i] != NULL; i++) {
410 
							current->indexes[current->index_count++] = cm_strdup(r[i]);
411 
						}
176 nishi 412 
					} else if(cm_strcaseequ(r[0], "ReadmeFile")) {
33 nishi 413 
						for(i = 1; r[i] != NULL; i++) {
414 
							current->readmes[current->readme_count++] = cm_strdup(r[i]);
415 
						}
6 nishi 416 
					} else {
39 nishi 417 
						stop = 1;
6 nishi 418 
						if(r[0] != NULL) {
39 nishi 419 
							int argc;
420 
							for(argc = 0; r[argc] != NULL; argc++)
421 
								;
422 
							stop = 0;
423 
							int i;
424 
							bool called = false;
425 
							struct tw_tool tools;
426 
							tw_init_tools(&tools);
427 
							for(i = 0; i < config.module_count; i++) {
428 
								tw_mod_config_t mod_config = (tw_mod_config_t)tw_module_symbol(config.modules[i], "mod_config");
429 
								int resp;
430 
								if(mod_config != NULL && (resp = mod_config(&tools, r, argc)) == TW_CONFIG_PARSED) {
431 
									called = true;
432 
									break;
433 
								}
434 
								if(resp == TW_CONFIG_ERROR) {
435 
									stop = 1;
436 
									called = true;
437 
									break;
438 
								}
439 
							}
440 
							if(!called) {
441 
								cm_log("Config", "Unknown directive `%s' at line %d", r[0], ln);
442 
								stop = 1;
443 
							}
6 nishi 444 
						}
5 nishi 445 
					}
446 
					for(i = 0; r[i] != NULL; i++) free(r[i]);
447 
					free(r);
4 nishi 448 
				}
449 
				free(l);
450 
				free(line);
451 
				line = malloc(1);
452 
				line[0] = 0;
453 
				if(c <= 0) break;
6 nishi 454 
			} else if(cbuf[0] != '\r') {
4 nishi 455 
				char* tmp = line;
456 
				line = cm_strcat(tmp, cbuf);
457 
				free(tmp);
458 
			}
459 
		}
460 
		free(line);
461 
		fclose(f);
6 nishi 462 
		return stop;
463 
	} else {
5 nishi 464 
		cm_log("Config", "Could not open the file");
4 nishi 465 
		return 1;
466 
	}
467 
}