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4 nishi 1 
/* $Id: config.c 22 2024-09-14 13:25:38Z 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;
12 nishi 85 
	config.vhost_count = 0;
18 nishi 86 
	config.module_count = 0;
87 
	config.extension = NULL;
17 nishi 88 
	config.server_root = cm_strdup(PREFIX);
12 nishi 89 
	gethostname(config.hostname, 1024);
7 nishi 90 
}
6 nishi 91 
 
92 
int tw_config_read(const char* path) {
4 nishi 93 
	cm_log("Config", "Reading %s", path);
94 
	char cbuf[2];
95 
	cbuf[1] = 0;
6 nishi 96 
	int ln = 0;
4 nishi 97 
	FILE* f = fopen(path, "r");
6 nishi 98 
	if(f != NULL) {
4 nishi 99 
		char* line = malloc(1);
100 
		line[0] = 0;
6 nishi 101 
		int stop = 0;
12 nishi 102 
		struct tw_config_entry* current = &config.root;
6 nishi 103 
		char* vhost = NULL;
21 nishi 104 
		char* dir = NULL;
6 nishi 105 
		while(stop == 0) {
4 nishi 106 
			int c = fread(cbuf, 1, 1, f);
6 nishi 107 
			if(cbuf[0] == '\n' || c <= 0) {
108 
				ln++;
4 nishi 109 
				char* l = cm_trim(line);
6 nishi 110 
				if(strlen(l) > 0 && l[0] != '#') {
5 nishi 111 
					char** r = cm_split(l, " \t");
112 
					int i;
6 nishi 113 
					if(cm_strcaseequ(r[0], "Include") || cm_strcaseequ(r[0], "IncludeOptional")) {
114 
						for(i = 1; r[i] != NULL; i++) {
115 
							if(tw_config_read(r[i]) != 0 && cm_strcaseequ(r[0], "Include")) {
116 
								stop = 1;
117 
								break;
5 nishi 118 
							}
119 
						}
21 nishi 120 
					} else if(cm_strcaseequ(r[0], "BeginDirectory")) {
121 
						if(dir != NULL) {
122 
							cm_log("Config", "Already in directory section at line %d", ln);
123 
							stop = 1;
124 
						} else {
125 
							if(r[1] == NULL) {
126 
								cm_log("Config", "Missing directory at line %d", ln);
127 
								stop = 1;
128 
							} else {
129 
								dir = cm_strcat(r[1], r[1][strlen(r[1]) - 1] == '/' ? "" : "/");
130 
							}
131 
						}
132 
					} else if(cm_strcaseequ(r[0], "EndDirectory")) {
133 
						if(dir == NULL) {
134 
							cm_log("Config", "Not in directory section at line %d", ln);
135 
							stop = 1;
136 
						} else {
137 
							free(dir);
138 
							dir = NULL;
139 
						}
140 
					} else if(cm_strcaseequ(r[0], "Allow")) {
141 
						if(dir == NULL) {
142 
							cm_log("Config", "Not in directory section at line %d", ln);
143 
							stop = 1;
144 
						} else {
145 
							if(r[1] == NULL) {
146 
								cm_log("Config", "Missing argument at line %d", ln);
147 
								stop = 1;
148 
							} else {
149 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
150 
								e->name = cm_strdup(r[1]);
151 
								e->dir = cm_strdup(dir);
152 
								e->type = TW_DIR_ALLOW;
153 
							}
154 
						}
155 
					} else if(cm_strcaseequ(r[0], "Deny")) {
156 
						if(dir == NULL) {
157 
							cm_log("Config", "Not in directory section at line %d", ln);
158 
							stop = 1;
159 
						} else {
160 
							if(r[1] == NULL) {
161 
								cm_log("Config", "Missing argument at line %d", ln);
162 
								stop = 1;
163 
							} else {
164 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
165 
								e->name = cm_strdup(r[1]);
166 
								e->dir = cm_strdup(dir);
167 
								e->type = TW_DIR_DENY;
168 
							}
169 
						}
6 nishi 170 
					} else if(cm_strcaseequ(r[0], "BeginVirtualHost")) {
171 
						if(vhost != NULL) {
12 nishi 172 
							cm_log("Config", "Already in virtual host section at line %d", ln);
6 nishi 173 
							stop = 1;
174 
						} else {
175 
							if(r[1] == NULL) {
12 nishi 176 
								cm_log("Config", "Missing virtual host at line %d", ln);
6 nishi 177 
								stop = 1;
178 
							} else {
179 
								vhost = cm_strdup(r[1]);
12 nishi 180 
								current = &config.vhosts[config.vhost_count++];
21 nishi 181 
								current->dir_count = 0;
182 
								current->mime_count = 0;
22 nishi 183 
								current->icon_count = 0;
12 nishi 184 
								int i;
185 
								current->name = cm_strdup(vhost);
13 nishi 186 
								current->port = -1;
12 nishi 187 
								for(i = 0; vhost[i] != 0; i++) {
188 
									if(vhost[i] == ':') {
189 
										current->name[i] = 0;
190 
										current->port = atoi(current->name + i + 1);
191 
										break;
192 
									}
193 
								}
6 nishi 194 
							}
195 
						}
196 
					} else if(cm_strcaseequ(r[0], "EndVirtualHost")) {
197 
						if(vhost == NULL) {
12 nishi 198 
							cm_log("Config", "Not in virtual host section at line %d", ln);
6 nishi 199 
							stop = 1;
200 
						} else {
201 
							free(vhost);
202 
							vhost = NULL;
12 nishi 203 
							current = &config.root;
6 nishi 204 
						}
7 nishi 205 
					} else if(cm_strcaseequ(r[0], "Listen") || cm_strcaseequ(r[0], "ListenSSL")) {
206 
						for(i = 1; r[i] != NULL; i++) {
207 
							uint64_t port = atoi(r[i]);
208 
							cm_log("Config", "Going to listen at port %d%s", (int)port, cm_strcaseequ(r[0], "ListenSSL") ? " with SSL" : "");
209 
							if(cm_strcaseequ(r[0], "ListenSSL")) port |= (1ULL << 32);
210 
							int j;
211 
							for(j = 0; config.ports[j] != -1; j++)
212 
								;
213 
							config.ports[j] = port;
214 
						}
12 nishi 215 
					} else if(cm_strcaseequ(r[0], "SSLKey")) {
216 
						if(r[1] == NULL) {
217 
							cm_log("Config", "Missing path at line %d", ln);
218 
							stop = 1;
219 
						} else {
220 
							if(current->sslkey != NULL) free(current->sslkey);
221 
							current->sslkey = cm_strdup(r[1]);
222 
						}
223 
					} else if(cm_strcaseequ(r[0], "SSLCertificate")) {
224 
						if(r[1] == NULL) {
225 
							cm_log("Config", "Missing path at line %d", ln);
226 
							stop = 1;
227 
						} else {
228 
							if(current->sslcert != NULL) free(current->sslcert);
229 
							current->sslcert = cm_strdup(r[1]);
230 
						}
19 nishi 231 
					} else if(cm_strcaseequ(r[0], "DocumentRoot")) {
232 
						if(r[1] == NULL) {
233 
							cm_log("Config", "Missing path at line %d", ln);
234 
							stop = 1;
235 
						} else {
236 
							if(current->root != NULL) free(current->root);
21 nishi 237 
							current->root = cm_strdup(strcmp(r[1], "/") == 0 ? "" : r[1]);
19 nishi 238 
						}
17 nishi 239 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
240 
						if(r[1] == NULL) {
241 
							cm_log("Config", "Missing path at line %d", ln);
242 
							stop = 1;
243 
						} else {
244 
							if(config.server_root != NULL) free(config.server_root);
245 
							config.server_root = cm_strdup(r[1]);
246 
						}
21 nishi 247 
					} else if(cm_strcaseequ(r[0], "MIMEType")) {
248 
						if(r[1] == NULL) {
249 
							cm_log("Config", "Missing extension at line %d", ln);
250 
							stop = 1;
22 nishi 251 
						} else if(r[2] == NULL) {
21 nishi 252 
							cm_log("Config", "Missing MIME at line %d", ln);
253 
							stop = 1;
254 
						} else {
255 
							struct tw_mime_entry* e = &current->mimes[current->mime_count++];
256 
							e->ext = cm_strdup(r[1]);
257 
							e->mime = cm_strdup(r[2]);
258 
						}
22 nishi 259 
					} else if(cm_strcaseequ(r[0], "Icon")) {
260 
						if(r[1] == NULL) {
261 
							cm_log("Config", "Missing MIME at line %d", ln);
262 
							stop = 1;
263 
						} else if(r[2] == NULL) {
264 
							cm_log("Config", "Missing path at line %d", ln);
265 
							stop = 1;
266 
						} else {
267 
							struct tw_icon_entry* e = &current->icons[current->icon_count++];
268 
							e->mime = cm_strdup(r[1]);
269 
							e->icon = cm_strdup(r[2]);
270 
						}
17 nishi 271 
					} else if(cm_strcaseequ(r[0], "LoadModule")) {
272 
						for(i = 1; r[i] != NULL; i++) {
273 
							void* mod = tw_module_load(r[i]);
274 
							if(mod != NULL) {
18 nishi 275 
								config.modules[config.module_count++] = mod;
17 nishi 276 
								if(tw_module_init(mod) != 0) {
277 
									stop = 1;
278 
									break;
279 
								}
280 
							} else {
281 
								stop = 1;
282 
								break;
283 
							}
284 
						}
6 nishi 285 
					} else {
286 
						if(r[0] != NULL) {
287 
							cm_log("Config", "Unknown directive `%s' at line %d", r[0], ln);
288 
						}
289 
						stop = 1;
5 nishi 290 
					}
291 
					for(i = 0; r[i] != NULL; i++) free(r[i]);
292 
					free(r);
4 nishi 293 
				}
294 
				free(l);
295 
				free(line);
296 
				line = malloc(1);
297 
				line[0] = 0;
298 
				if(c <= 0) break;
6 nishi 299 
			} else if(cbuf[0] != '\r') {
4 nishi 300 
				char* tmp = line;
301 
				line = cm_strcat(tmp, cbuf);
302 
				free(tmp);
303 
			}
304 
		}
305 
		free(line);
306 
		fclose(f);
6 nishi 307 
		return stop;
308 
	} else {
5 nishi 309 
		cm_log("Config", "Could not open the file");
4 nishi 310 
		return 1;
311 
	}
312 
}