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4 nishi 1 
/* $Id: config.c 138 2024-09-23 11:12:46Z 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++) {
75 
		config.vhosts[i].sslkey = NULL;
76 
		config.vhosts[i].sslcert = NULL;
19 nishi 77 
		config.vhosts[i].root = NULL;
12 nishi 78 
	}
79 
	config.root.sslkey = NULL;
80 
	config.root.sslcert = NULL;
19 nishi 81 
	config.root.root = NULL;
21 nishi 82 
	config.root.mime_count = 0;
83 
	config.root.dir_count = 0;
22 nishi 84 
	config.root.icon_count = 0;
24 nishi 85 
	config.root.index_count = 0;
33 nishi 86 
	config.root.readme_count = 0;
123 nishi 87 
	config.root.hideport = 0;
12 nishi 88 
	config.vhost_count = 0;
18 nishi 89 
	config.module_count = 0;
90 
	config.extension = NULL;
17 nishi 91 
	config.server_root = cm_strdup(PREFIX);
128 nishi 92 
	config.server_admin = cm_strdup(SERVER_ADMIN);
12 nishi 93 
	gethostname(config.hostname, 1024);
7 nishi 94 
}
6 nishi 95 
 
96 
int tw_config_read(const char* path) {
4 nishi 97 
	cm_log("Config", "Reading %s", path);
98 
	char cbuf[2];
99 
	cbuf[1] = 0;
6 nishi 100 
	int ln = 0;
4 nishi 101 
	FILE* f = fopen(path, "r");
6 nishi 102 
	if(f != NULL) {
4 nishi 103 
		char* line = malloc(1);
104 
		line[0] = 0;
6 nishi 105 
		int stop = 0;
12 nishi 106 
		struct tw_config_entry* current = &config.root;
6 nishi 107 
		char* vhost = NULL;
21 nishi 108 
		char* dir = NULL;
6 nishi 109 
		while(stop == 0) {
4 nishi 110 
			int c = fread(cbuf, 1, 1, f);
6 nishi 111 
			if(cbuf[0] == '\n' || c <= 0) {
112 
				ln++;
4 nishi 113 
				char* l = cm_trim(line);
6 nishi 114 
				if(strlen(l) > 0 && l[0] != '#') {
5 nishi 115 
					char** r = cm_split(l, " \t");
116 
					int i;
6 nishi 117 
					if(cm_strcaseequ(r[0], "Include") || cm_strcaseequ(r[0], "IncludeOptional")) {
118 
						for(i = 1; r[i] != NULL; i++) {
119 
							if(tw_config_read(r[i]) != 0 && cm_strcaseequ(r[0], "Include")) {
120 
								stop = 1;
121 
								break;
5 nishi 122 
							}
123 
						}
21 nishi 124 
					} else if(cm_strcaseequ(r[0], "BeginDirectory")) {
125 
						if(dir != NULL) {
126 
							cm_log("Config", "Already in directory section at line %d", ln);
127 
							stop = 1;
128 
						} else {
129 
							if(r[1] == NULL) {
130 
								cm_log("Config", "Missing directory at line %d", ln);
131 
								stop = 1;
132 
							} else {
133 
								dir = cm_strcat(r[1], r[1][strlen(r[1]) - 1] == '/' ? "" : "/");
134 
							}
135 
						}
136 
					} else if(cm_strcaseequ(r[0], "EndDirectory")) {
137 
						if(dir == NULL) {
138 
							cm_log("Config", "Not in directory section at line %d", ln);
139 
							stop = 1;
140 
						} else {
141 
							free(dir);
142 
							dir = NULL;
143 
						}
144 
					} else if(cm_strcaseequ(r[0], "Allow")) {
145 
						if(dir == NULL) {
146 
							cm_log("Config", "Not in directory section at line %d", ln);
147 
							stop = 1;
148 
						} else {
149 
							if(r[1] == NULL) {
150 
								cm_log("Config", "Missing argument at line %d", ln);
151 
								stop = 1;
152 
							} else {
153 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
154 
								e->name = cm_strdup(r[1]);
155 
								e->dir = cm_strdup(dir);
156 
								e->type = TW_DIR_ALLOW;
157 
							}
158 
						}
159 
					} else if(cm_strcaseequ(r[0], "Deny")) {
160 
						if(dir == NULL) {
161 
							cm_log("Config", "Not in directory section at line %d", ln);
162 
							stop = 1;
163 
						} else {
164 
							if(r[1] == NULL) {
165 
								cm_log("Config", "Missing argument at line %d", ln);
166 
								stop = 1;
167 
							} else {
168 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
169 
								e->name = cm_strdup(r[1]);
170 
								e->dir = cm_strdup(dir);
171 
								e->type = TW_DIR_DENY;
172 
							}
173 
						}
6 nishi 174 
					} else if(cm_strcaseequ(r[0], "BeginVirtualHost")) {
175 
						if(vhost != NULL) {
12 nishi 176 
							cm_log("Config", "Already in virtual host section at line %d", ln);
6 nishi 177 
							stop = 1;
178 
						} else {
179 
							if(r[1] == NULL) {
12 nishi 180 
								cm_log("Config", "Missing virtual host at line %d", ln);
6 nishi 181 
								stop = 1;
182 
							} else {
183 
								vhost = cm_strdup(r[1]);
12 nishi 184 
								current = &config.vhosts[config.vhost_count++];
21 nishi 185 
								current->dir_count = 0;
186 
								current->mime_count = 0;
22 nishi 187 
								current->icon_count = 0;
24 nishi 188 
								current->index_count = 0;
33 nishi 189 
								current->readme_count = 0;
123 nishi 190 
								current->hideport = -1;
12 nishi 191 
								int i;
192 
								current->name = cm_strdup(vhost);
13 nishi 193 
								current->port = -1;
12 nishi 194 
								for(i = 0; vhost[i] != 0; i++) {
195 
									if(vhost[i] == ':') {
196 
										current->name[i] = 0;
197 
										current->port = atoi(current->name + i + 1);
198 
										break;
199 
									}
200 
								}
6 nishi 201 
							}
202 
						}
203 
					} else if(cm_strcaseequ(r[0], "EndVirtualHost")) {
204 
						if(vhost == NULL) {
12 nishi 205 
							cm_log("Config", "Not in virtual host section at line %d", ln);
6 nishi 206 
							stop = 1;
207 
						} else {
208 
							free(vhost);
209 
							vhost = NULL;
12 nishi 210 
							current = &config.root;
6 nishi 211 
						}
7 nishi 212 
					} else if(cm_strcaseequ(r[0], "Listen") || cm_strcaseequ(r[0], "ListenSSL")) {
213 
						for(i = 1; r[i] != NULL; i++) {
214 
							uint64_t port = atoi(r[i]);
215 
							cm_log("Config", "Going to listen at port %d%s", (int)port, cm_strcaseequ(r[0], "ListenSSL") ? " with SSL" : "");
216 
							if(cm_strcaseequ(r[0], "ListenSSL")) port |= (1ULL << 32);
217 
							int j;
218 
							for(j = 0; config.ports[j] != -1; j++)
219 
								;
220 
							config.ports[j] = port;
221 
						}
123 nishi 222 
					} else if(cm_strcaseequ(r[0], "HidePort")) {
223 
						current->hideport = 1;
224 
					} else if(cm_strcaseequ(r[0], "ShowPort")) {
225 
						current->hideport = 0;
12 nishi 226 
					} else if(cm_strcaseequ(r[0], "SSLKey")) {
227 
						if(r[1] == NULL) {
228 
							cm_log("Config", "Missing path at line %d", ln);
229 
							stop = 1;
230 
						} else {
231 
							if(current->sslkey != NULL) free(current->sslkey);
232 
							current->sslkey = cm_strdup(r[1]);
233 
						}
234 
					} else if(cm_strcaseequ(r[0], "SSLCertificate")) {
235 
						if(r[1] == NULL) {
236 
							cm_log("Config", "Missing path at line %d", ln);
237 
							stop = 1;
238 
						} else {
239 
							if(current->sslcert != NULL) free(current->sslcert);
240 
							current->sslcert = cm_strdup(r[1]);
241 
						}
61 nishi 242 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
243 
						if(r[1] == NULL) {
244 
							cm_log("Config", "Missing path at line %d", ln);
245 
							stop = 1;
246 
						} else {
247 
							chdir(r[1]);
127 nishi 248 
							free(config.server_root);
249 
							config.server_root = cm_strdup(r[1]);
61 nishi 250 
						}
128 nishi 251 
					} else if(cm_strcaseequ(r[0], "ServerAdmin")) {
252 
						if(r[1] == NULL) {
253 
							cm_log("Config", "Missing email at line %d", ln);
254 
							stop = 1;
255 
						} else {
256 
							free(config.server_admin);
257 
							config.server_admin = cm_strdup(r[1]);
258 
						}
19 nishi 259 
					} else if(cm_strcaseequ(r[0], "DocumentRoot")) {
260 
						if(r[1] == NULL) {
261 
							cm_log("Config", "Missing path at line %d", ln);
262 
							stop = 1;
263 
						} else {
264 
							if(current->root != NULL) free(current->root);
21 nishi 265 
							current->root = cm_strdup(strcmp(r[1], "/") == 0 ? "" : r[1]);
19 nishi 266 
						}
17 nishi 267 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
268 
						if(r[1] == NULL) {
269 
							cm_log("Config", "Missing path at line %d", ln);
270 
							stop = 1;
271 
						} else {
272 
							if(config.server_root != NULL) free(config.server_root);
273 
							config.server_root = cm_strdup(r[1]);
274 
						}
21 nishi 275 
					} else if(cm_strcaseequ(r[0], "MIMEType")) {
276 
						if(r[1] == NULL) {
277 
							cm_log("Config", "Missing extension at line %d", ln);
278 
							stop = 1;
22 nishi 279 
						} else if(r[2] == NULL) {
21 nishi 280 
							cm_log("Config", "Missing MIME at line %d", ln);
281 
							stop = 1;
282 
						} else {
283 
							struct tw_mime_entry* e = &current->mimes[current->mime_count++];
284 
							e->ext = cm_strdup(r[1]);
285 
							e->mime = cm_strdup(r[2]);
286 
						}
22 nishi 287 
					} else if(cm_strcaseequ(r[0], "Icon")) {
288 
						if(r[1] == NULL) {
289 
							cm_log("Config", "Missing MIME at line %d", ln);
290 
							stop = 1;
291 
						} else if(r[2] == NULL) {
292 
							cm_log("Config", "Missing path at line %d", ln);
293 
							stop = 1;
294 
						} else {
295 
							struct tw_icon_entry* e = &current->icons[current->icon_count++];
296 
							e->mime = cm_strdup(r[1]);
297 
							e->icon = cm_strdup(r[2]);
298 
						}
17 nishi 299 
					} else if(cm_strcaseequ(r[0], "LoadModule")) {
300 
						for(i = 1; r[i] != NULL; i++) {
301 
							void* mod = tw_module_load(r[i]);
302 
							if(mod != NULL) {
18 nishi 303 
								config.modules[config.module_count++] = mod;
17 nishi 304 
								if(tw_module_init(mod) != 0) {
305 
									stop = 1;
306 
									break;
307 
								}
308 
							} else {
127 nishi 309 
								cm_log("Config", "Could not load the module at line %d", ln);
17 nishi 310 
								stop = 1;
311 
								break;
312 
							}
313 
						}
24 nishi 314 
					} else if(cm_strcaseequ(r[0], "DirectoryIndex")) {
315 
						for(i = 1; r[i] != NULL; i++) {
316 
							current->indexes[current->index_count++] = cm_strdup(r[i]);
317 
						}
33 nishi 318 
					} else if(cm_strcaseequ(r[0], "Readme")) {
319 
						for(i = 1; r[i] != NULL; i++) {
320 
							current->readmes[current->readme_count++] = cm_strdup(r[i]);
321 
						}
6 nishi 322 
					} else {
39 nishi 323 
						stop = 1;
6 nishi 324 
						if(r[0] != NULL) {
39 nishi 325 
							int argc;
326 
							for(argc = 0; r[argc] != NULL; argc++)
327 
								;
328 
							stop = 0;
329 
							int i;
330 
							bool called = false;
331 
							struct tw_tool tools;
332 
							tw_init_tools(&tools);
333 
							for(i = 0; i < config.module_count; i++) {
334 
								tw_mod_config_t mod_config = (tw_mod_config_t)tw_module_symbol(config.modules[i], "mod_config");
335 
								int resp;
336 
								if(mod_config != NULL && (resp = mod_config(&tools, r, argc)) == TW_CONFIG_PARSED) {
337 
									called = true;
338 
									break;
339 
								}
340 
								if(resp == TW_CONFIG_ERROR) {
341 
									stop = 1;
342 
									called = true;
343 
									break;
344 
								}
345 
							}
346 
							if(!called) {
347 
								cm_log("Config", "Unknown directive `%s' at line %d", r[0], ln);
348 
								stop = 1;
349 
							}
6 nishi 350 
						}
5 nishi 351 
					}
352 
					for(i = 0; r[i] != NULL; i++) free(r[i]);
353 
					free(r);
4 nishi 354 
				}
355 
				free(l);
356 
				free(line);
357 
				line = malloc(1);
358 
				line[0] = 0;
359 
				if(c <= 0) break;
6 nishi 360 
			} else if(cbuf[0] != '\r') {
4 nishi 361 
				char* tmp = line;
362 
				line = cm_strcat(tmp, cbuf);
363 
				free(tmp);
364 
			}
365 
		}
366 
		free(line);
367 
		fclose(f);
6 nishi 368 
		return stop;
369 
	} else {
5 nishi 370 
		cm_log("Config", "Could not open the file");
4 nishi 371 
		return 1;
372 
	}
373 
}