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