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4 nishi 1 
/* $Id: config.c 61 2024-09-18 12:45:02Z 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;
12 nishi 87 
	config.vhost_count = 0;
18 nishi 88 
	config.module_count = 0;
89 
	config.extension = NULL;
17 nishi 90 
	config.server_root = cm_strdup(PREFIX);
12 nishi 91 
	gethostname(config.hostname, 1024);
7 nishi 92 
}
6 nishi 93 
 
94 
int tw_config_read(const char* path) {
4 nishi 95 
	cm_log("Config", "Reading %s", path);
96 
	char cbuf[2];
97 
	cbuf[1] = 0;
6 nishi 98 
	int ln = 0;
4 nishi 99 
	FILE* f = fopen(path, "r");
6 nishi 100 
	if(f != NULL) {
4 nishi 101 
		char* line = malloc(1);
102 
		line[0] = 0;
6 nishi 103 
		int stop = 0;
12 nishi 104 
		struct tw_config_entry* current = &config.root;
6 nishi 105 
		char* vhost = NULL;
21 nishi 106 
		char* dir = NULL;
6 nishi 107 
		while(stop == 0) {
4 nishi 108 
			int c = fread(cbuf, 1, 1, f);
6 nishi 109 
			if(cbuf[0] == '\n' || c <= 0) {
110 
				ln++;
4 nishi 111 
				char* l = cm_trim(line);
6 nishi 112 
				if(strlen(l) > 0 && l[0] != '#') {
5 nishi 113 
					char** r = cm_split(l, " \t");
114 
					int i;
6 nishi 115 
					if(cm_strcaseequ(r[0], "Include") || cm_strcaseequ(r[0], "IncludeOptional")) {
116 
						for(i = 1; r[i] != NULL; i++) {
117 
							if(tw_config_read(r[i]) != 0 && cm_strcaseequ(r[0], "Include")) {
118 
								stop = 1;
119 
								break;
5 nishi 120 
							}
121 
						}
21 nishi 122 
					} else if(cm_strcaseequ(r[0], "BeginDirectory")) {
123 
						if(dir != NULL) {
124 
							cm_log("Config", "Already in directory section at line %d", ln);
125 
							stop = 1;
126 
						} else {
127 
							if(r[1] == NULL) {
128 
								cm_log("Config", "Missing directory at line %d", ln);
129 
								stop = 1;
130 
							} else {
131 
								dir = cm_strcat(r[1], r[1][strlen(r[1]) - 1] == '/' ? "" : "/");
132 
							}
133 
						}
134 
					} else if(cm_strcaseequ(r[0], "EndDirectory")) {
135 
						if(dir == NULL) {
136 
							cm_log("Config", "Not in directory section at line %d", ln);
137 
							stop = 1;
138 
						} else {
139 
							free(dir);
140 
							dir = NULL;
141 
						}
142 
					} else if(cm_strcaseequ(r[0], "Allow")) {
143 
						if(dir == NULL) {
144 
							cm_log("Config", "Not in directory section at line %d", ln);
145 
							stop = 1;
146 
						} else {
147 
							if(r[1] == NULL) {
148 
								cm_log("Config", "Missing argument at line %d", ln);
149 
								stop = 1;
150 
							} else {
151 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
152 
								e->name = cm_strdup(r[1]);
153 
								e->dir = cm_strdup(dir);
154 
								e->type = TW_DIR_ALLOW;
155 
							}
156 
						}
157 
					} else if(cm_strcaseequ(r[0], "Deny")) {
158 
						if(dir == NULL) {
159 
							cm_log("Config", "Not in directory section at line %d", ln);
160 
							stop = 1;
161 
						} else {
162 
							if(r[1] == NULL) {
163 
								cm_log("Config", "Missing argument at line %d", ln);
164 
								stop = 1;
165 
							} else {
166 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
167 
								e->name = cm_strdup(r[1]);
168 
								e->dir = cm_strdup(dir);
169 
								e->type = TW_DIR_DENY;
170 
							}
171 
						}
6 nishi 172 
					} else if(cm_strcaseequ(r[0], "BeginVirtualHost")) {
173 
						if(vhost != NULL) {
12 nishi 174 
							cm_log("Config", "Already in virtual host section at line %d", ln);
6 nishi 175 
							stop = 1;
176 
						} else {
177 
							if(r[1] == NULL) {
12 nishi 178 
								cm_log("Config", "Missing virtual host at line %d", ln);
6 nishi 179 
								stop = 1;
180 
							} else {
181 
								vhost = cm_strdup(r[1]);
12 nishi 182 
								current = &config.vhosts[config.vhost_count++];
21 nishi 183 
								current->dir_count = 0;
184 
								current->mime_count = 0;
22 nishi 185 
								current->icon_count = 0;
24 nishi 186 
								current->index_count = 0;
33 nishi 187 
								current->readme_count = 0;
12 nishi 188 
								int i;
189 
								current->name = cm_strdup(vhost);
13 nishi 190 
								current->port = -1;
12 nishi 191 
								for(i = 0; vhost[i] != 0; i++) {
192 
									if(vhost[i] == ':') {
193 
										current->name[i] = 0;
194 
										current->port = atoi(current->name + i + 1);
195 
										break;
196 
									}
197 
								}
6 nishi 198 
							}
199 
						}
200 
					} else if(cm_strcaseequ(r[0], "EndVirtualHost")) {
201 
						if(vhost == NULL) {
12 nishi 202 
							cm_log("Config", "Not in virtual host section at line %d", ln);
6 nishi 203 
							stop = 1;
204 
						} else {
205 
							free(vhost);
206 
							vhost = NULL;
12 nishi 207 
							current = &config.root;
6 nishi 208 
						}
7 nishi 209 
					} else if(cm_strcaseequ(r[0], "Listen") || cm_strcaseequ(r[0], "ListenSSL")) {
210 
						for(i = 1; r[i] != NULL; i++) {
211 
							uint64_t port = atoi(r[i]);
212 
							cm_log("Config", "Going to listen at port %d%s", (int)port, cm_strcaseequ(r[0], "ListenSSL") ? " with SSL" : "");
213 
							if(cm_strcaseequ(r[0], "ListenSSL")) port |= (1ULL << 32);
214 
							int j;
215 
							for(j = 0; config.ports[j] != -1; j++)
216 
								;
217 
							config.ports[j] = port;
218 
						}
12 nishi 219 
					} else if(cm_strcaseequ(r[0], "SSLKey")) {
220 
						if(r[1] == NULL) {
221 
							cm_log("Config", "Missing path at line %d", ln);
222 
							stop = 1;
223 
						} else {
224 
							if(current->sslkey != NULL) free(current->sslkey);
225 
							current->sslkey = cm_strdup(r[1]);
226 
						}
227 
					} else if(cm_strcaseequ(r[0], "SSLCertificate")) {
228 
						if(r[1] == NULL) {
229 
							cm_log("Config", "Missing path at line %d", ln);
230 
							stop = 1;
231 
						} else {
232 
							if(current->sslcert != NULL) free(current->sslcert);
233 
							current->sslcert = cm_strdup(r[1]);
234 
						}
61 nishi 235 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
236 
						if(r[1] == NULL) {
237 
							cm_log("Config", "Missing path at line %d", ln);
238 
							stop = 1;
239 
						} else {
240 
							chdir(r[1]);
241 
						}
19 nishi 242 
					} else if(cm_strcaseequ(r[0], "DocumentRoot")) {
243 
						if(r[1] == NULL) {
244 
							cm_log("Config", "Missing path at line %d", ln);
245 
							stop = 1;
246 
						} else {
247 
							if(current->root != NULL) free(current->root);
21 nishi 248 
							current->root = cm_strdup(strcmp(r[1], "/") == 0 ? "" : r[1]);
19 nishi 249 
						}
17 nishi 250 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
251 
						if(r[1] == NULL) {
252 
							cm_log("Config", "Missing path at line %d", ln);
253 
							stop = 1;
254 
						} else {
255 
							if(config.server_root != NULL) free(config.server_root);
256 
							config.server_root = cm_strdup(r[1]);
257 
						}
21 nishi 258 
					} else if(cm_strcaseequ(r[0], "MIMEType")) {
259 
						if(r[1] == NULL) {
260 
							cm_log("Config", "Missing extension at line %d", ln);
261 
							stop = 1;
22 nishi 262 
						} else if(r[2] == NULL) {
21 nishi 263 
							cm_log("Config", "Missing MIME at line %d", ln);
264 
							stop = 1;
265 
						} else {
266 
							struct tw_mime_entry* e = &current->mimes[current->mime_count++];
267 
							e->ext = cm_strdup(r[1]);
268 
							e->mime = cm_strdup(r[2]);
269 
						}
22 nishi 270 
					} else if(cm_strcaseequ(r[0], "Icon")) {
271 
						if(r[1] == NULL) {
272 
							cm_log("Config", "Missing MIME at line %d", ln);
273 
							stop = 1;
274 
						} else if(r[2] == NULL) {
275 
							cm_log("Config", "Missing path at line %d", ln);
276 
							stop = 1;
277 
						} else {
278 
							struct tw_icon_entry* e = &current->icons[current->icon_count++];
279 
							e->mime = cm_strdup(r[1]);
280 
							e->icon = cm_strdup(r[2]);
281 
						}
17 nishi 282 
					} else if(cm_strcaseequ(r[0], "LoadModule")) {
283 
						for(i = 1; r[i] != NULL; i++) {
284 
							void* mod = tw_module_load(r[i]);
285 
							if(mod != NULL) {
18 nishi 286 
								config.modules[config.module_count++] = mod;
17 nishi 287 
								if(tw_module_init(mod) != 0) {
288 
									stop = 1;
289 
									break;
290 
								}
291 
							} else {
292 
								stop = 1;
293 
								break;
294 
							}
295 
						}
24 nishi 296 
					} else if(cm_strcaseequ(r[0], "DirectoryIndex")) {
297 
						for(i = 1; r[i] != NULL; i++) {
298 
							current->indexes[current->index_count++] = cm_strdup(r[i]);
299 
						}
33 nishi 300 
					} else if(cm_strcaseequ(r[0], "Readme")) {
301 
						for(i = 1; r[i] != NULL; i++) {
302 
							current->readmes[current->readme_count++] = cm_strdup(r[i]);
303 
						}
6 nishi 304 
					} else {
39 nishi 305 
						stop = 1;
6 nishi 306 
						if(r[0] != NULL) {
39 nishi 307 
							int argc;
308 
							for(argc = 0; r[argc] != NULL; argc++)
309 
								;
310 
							stop = 0;
311 
							int i;
312 
							bool called = false;
313 
							struct tw_tool tools;
314 
							tw_init_tools(&tools);
315 
							for(i = 0; i < config.module_count; i++) {
316 
								tw_mod_config_t mod_config = (tw_mod_config_t)tw_module_symbol(config.modules[i], "mod_config");
317 
								int resp;
318 
								if(mod_config != NULL && (resp = mod_config(&tools, r, argc)) == TW_CONFIG_PARSED) {
319 
									called = true;
320 
									break;
321 
								}
322 
								if(resp == TW_CONFIG_ERROR) {
323 
									stop = 1;
324 
									called = true;
325 
									break;
326 
								}
327 
							}
328 
							if(!called) {
329 
								cm_log("Config", "Unknown directive `%s' at line %d", r[0], ln);
330 
								stop = 1;
331 
							}
6 nishi 332 
						}
5 nishi 333 
					}
334 
					for(i = 0; r[i] != NULL; i++) free(r[i]);
335 
					free(r);
4 nishi 336 
				}
337 
				free(l);
338 
				free(line);
339 
				line = malloc(1);
340 
				line[0] = 0;
341 
				if(c <= 0) break;
6 nishi 342 
			} else if(cbuf[0] != '\r') {
4 nishi 343 
				char* tmp = line;
344 
				line = cm_strcat(tmp, cbuf);
345 
				free(tmp);
346 
			}
347 
		}
348 
		free(line);
349 
		fclose(f);
6 nishi 350 
		return stop;
351 
	} else {
5 nishi 352 
		cm_log("Config", "Could not open the file");
4 nishi 353 
		return 1;
354 
	}
355 
}