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4 nishi 1 
/* $Id: config.c 21 2024-09-14 12:39:39Z 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 
 
21 nishi 33 
bool tw_permission_allowed(const char* path, SOCKADDR addr, struct tw_http_request req, struct tw_config_entry* vhost){
34 
	int i;
35 
	bool found = false;
36 
	bool pathstart = false;
37 
	bool perm = false;
38 
again:
39 
	for(i = 0; i < vhost->dir_count; i++){
40 
		struct tw_dir_entry* e = &vhost->dirs[i];
41 
		pathstart = false;
42 
		if(strlen(path) >= strlen(e->dir)){
43 
			pathstart = true;
44 
			int j;
45 
			for(j = 0; path[j] != 0 && e->dir[j] != 0; j++){
46 
				if(path[j] != e->dir[j]){
47 
					pathstart = false;
48 
					break;
49 
				}
50 
			}
51 
		}
52 
		char* noslash = cm_strdup(e->dir);
53 
		noslash[strlen(noslash) - 1] = 0;
54 
		if(strcmp(e->dir, path) == 0 || strcmp(noslash, path) == 0 || pathstart){
55 
			found = true;
56 
			if(strcmp(e->name, "all") == 0){
57 
				perm = e->type == TW_DIR_ALLOW;
58 
			}
59 
		}
60 
		free(noslash);
61 
	}
62 
	if(!found && vhost != &config.root){
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;
12 nishi 84 
	config.vhost_count = 0;
18 nishi 85 
	config.module_count = 0;
86 
	config.extension = NULL;
17 nishi 87 
	config.server_root = cm_strdup(PREFIX);
12 nishi 88 
	gethostname(config.hostname, 1024);
7 nishi 89 
}
6 nishi 90 
 
91 
int tw_config_read(const char* path) {
4 nishi 92 
	cm_log("Config", "Reading %s", path);
93 
	char cbuf[2];
94 
	cbuf[1] = 0;
6 nishi 95 
	int ln = 0;
4 nishi 96 
	FILE* f = fopen(path, "r");
6 nishi 97 
	if(f != NULL) {
4 nishi 98 
		char* line = malloc(1);
99 
		line[0] = 0;
6 nishi 100 
		int stop = 0;
12 nishi 101 
		struct tw_config_entry* current = &config.root;
6 nishi 102 
		char* vhost = NULL;
21 nishi 103 
		char* dir = NULL;
6 nishi 104 
		while(stop == 0) {
4 nishi 105 
			int c = fread(cbuf, 1, 1, f);
6 nishi 106 
			if(cbuf[0] == '\n' || c <= 0) {
107 
				ln++;
4 nishi 108 
				char* l = cm_trim(line);
6 nishi 109 
				if(strlen(l) > 0 && l[0] != '#') {
5 nishi 110 
					char** r = cm_split(l, " \t");
111 
					int i;
6 nishi 112 
					if(cm_strcaseequ(r[0], "Include") || cm_strcaseequ(r[0], "IncludeOptional")) {
113 
						for(i = 1; r[i] != NULL; i++) {
114 
							if(tw_config_read(r[i]) != 0 && cm_strcaseequ(r[0], "Include")) {
115 
								stop = 1;
116 
								break;
5 nishi 117 
							}
118 
						}
21 nishi 119 
					} else if(cm_strcaseequ(r[0], "BeginDirectory")) {
120 
						if(dir != NULL) {
121 
							cm_log("Config", "Already in directory section at line %d", ln);
122 
							stop = 1;
123 
						} else {
124 
							if(r[1] == NULL) {
125 
								cm_log("Config", "Missing directory at line %d", ln);
126 
								stop = 1;
127 
							} else {
128 
								dir = cm_strcat(r[1], r[1][strlen(r[1]) - 1] == '/' ? "" : "/");
129 
							}
130 
						}
131 
					} else if(cm_strcaseequ(r[0], "EndDirectory")) {
132 
						if(dir == NULL) {
133 
							cm_log("Config", "Not in directory section at line %d", ln);
134 
							stop = 1;
135 
						} else {
136 
							free(dir);
137 
							dir = NULL;
138 
						}
139 
					} else if(cm_strcaseequ(r[0], "Allow")) {
140 
						if(dir == NULL) {
141 
							cm_log("Config", "Not in directory section at line %d", ln);
142 
							stop = 1;
143 
						} else {
144 
							if(r[1] == NULL) {
145 
								cm_log("Config", "Missing argument at line %d", ln);
146 
								stop = 1;
147 
							} else {
148 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
149 
								e->name = cm_strdup(r[1]);
150 
								e->dir = cm_strdup(dir);
151 
								e->type = TW_DIR_ALLOW;
152 
							}
153 
						}
154 
					} else if(cm_strcaseequ(r[0], "Deny")) {
155 
						if(dir == NULL) {
156 
							cm_log("Config", "Not in directory section at line %d", ln);
157 
							stop = 1;
158 
						} else {
159 
							if(r[1] == NULL) {
160 
								cm_log("Config", "Missing argument at line %d", ln);
161 
								stop = 1;
162 
							} else {
163 
								struct tw_dir_entry* e = &current->dirs[current->dir_count++];
164 
								e->name = cm_strdup(r[1]);
165 
								e->dir = cm_strdup(dir);
166 
								e->type = TW_DIR_DENY;
167 
							}
168 
						}
6 nishi 169 
					} else if(cm_strcaseequ(r[0], "BeginVirtualHost")) {
170 
						if(vhost != NULL) {
12 nishi 171 
							cm_log("Config", "Already in virtual host section at line %d", ln);
6 nishi 172 
							stop = 1;
173 
						} else {
174 
							if(r[1] == NULL) {
12 nishi 175 
								cm_log("Config", "Missing virtual host at line %d", ln);
6 nishi 176 
								stop = 1;
177 
							} else {
178 
								vhost = cm_strdup(r[1]);
12 nishi 179 
								current = &config.vhosts[config.vhost_count++];
21 nishi 180 
								current->dir_count = 0;
181 
								current->mime_count = 0;
12 nishi 182 
								int i;
183 
								current->name = cm_strdup(vhost);
13 nishi 184 
								current->port = -1;
12 nishi 185 
								for(i = 0; vhost[i] != 0; i++) {
186 
									if(vhost[i] == ':') {
187 
										current->name[i] = 0;
188 
										current->port = atoi(current->name + i + 1);
189 
										break;
190 
									}
191 
								}
6 nishi 192 
							}
193 
						}
194 
					} else if(cm_strcaseequ(r[0], "EndVirtualHost")) {
195 
						if(vhost == NULL) {
12 nishi 196 
							cm_log("Config", "Not in virtual host section at line %d", ln);
6 nishi 197 
							stop = 1;
198 
						} else {
199 
							free(vhost);
200 
							vhost = NULL;
12 nishi 201 
							current = &config.root;
6 nishi 202 
						}
7 nishi 203 
					} else if(cm_strcaseequ(r[0], "Listen") || cm_strcaseequ(r[0], "ListenSSL")) {
204 
						for(i = 1; r[i] != NULL; i++) {
205 
							uint64_t port = atoi(r[i]);
206 
							cm_log("Config", "Going to listen at port %d%s", (int)port, cm_strcaseequ(r[0], "ListenSSL") ? " with SSL" : "");
207 
							if(cm_strcaseequ(r[0], "ListenSSL")) port |= (1ULL << 32);
208 
							int j;
209 
							for(j = 0; config.ports[j] != -1; j++)
210 
								;
211 
							config.ports[j] = port;
212 
						}
12 nishi 213 
					} else if(cm_strcaseequ(r[0], "SSLKey")) {
214 
						if(r[1] == NULL) {
215 
							cm_log("Config", "Missing path at line %d", ln);
216 
							stop = 1;
217 
						} else {
218 
							if(current->sslkey != NULL) free(current->sslkey);
219 
							current->sslkey = cm_strdup(r[1]);
220 
						}
221 
					} else if(cm_strcaseequ(r[0], "SSLCertificate")) {
222 
						if(r[1] == NULL) {
223 
							cm_log("Config", "Missing path at line %d", ln);
224 
							stop = 1;
225 
						} else {
226 
							if(current->sslcert != NULL) free(current->sslcert);
227 
							current->sslcert = cm_strdup(r[1]);
228 
						}
19 nishi 229 
					} else if(cm_strcaseequ(r[0], "DocumentRoot")) {
230 
						if(r[1] == NULL) {
231 
							cm_log("Config", "Missing path at line %d", ln);
232 
							stop = 1;
233 
						} else {
234 
							if(current->root != NULL) free(current->root);
21 nishi 235 
							current->root = cm_strdup(strcmp(r[1], "/") == 0 ? "" : r[1]);
19 nishi 236 
						}
17 nishi 237 
					} else if(cm_strcaseequ(r[0], "ServerRoot")) {
238 
						if(r[1] == NULL) {
239 
							cm_log("Config", "Missing path at line %d", ln);
240 
							stop = 1;
241 
						} else {
242 
							if(config.server_root != NULL) free(config.server_root);
243 
							config.server_root = cm_strdup(r[1]);
244 
						}
21 nishi 245 
					} else if(cm_strcaseequ(r[0], "MIMEType")) {
246 
						if(r[1] == NULL) {
247 
							cm_log("Config", "Missing extension at line %d", ln);
248 
							stop = 1;
249 
						}else if(r[2] == NULL) {
250 
							cm_log("Config", "Missing MIME at line %d", ln);
251 
							stop = 1;
252 
						} else {
253 
							struct tw_mime_entry* e = &current->mimes[current->mime_count++];
254 
							e->ext = cm_strdup(r[1]);
255 
							e->mime = cm_strdup(r[2]);
256 
						}
17 nishi 257 
					} else if(cm_strcaseequ(r[0], "LoadModule")) {
258 
						for(i = 1; r[i] != NULL; i++) {
259 
							void* mod = tw_module_load(r[i]);
260 
							if(mod != NULL) {
18 nishi 261 
								config.modules[config.module_count++] = mod;
17 nishi 262 
								if(tw_module_init(mod) != 0) {
263 
									stop = 1;
264 
									break;
265 
								}
266 
							} else {
267 
								stop = 1;
268 
								break;
269 
							}
270 
						}
6 nishi 271 
					} else {
272 
						if(r[0] != NULL) {
273 
							cm_log("Config", "Unknown directive `%s' at line %d", r[0], ln);
274 
						}
275 
						stop = 1;
5 nishi 276 
					}
277 
					for(i = 0; r[i] != NULL; i++) free(r[i]);
278 
					free(r);
4 nishi 279 
				}
280 
				free(l);
281 
				free(line);
282 
				line = malloc(1);
283 
				line[0] = 0;
284 
				if(c <= 0) break;
6 nishi 285 
			} else if(cbuf[0] != '\r') {
4 nishi 286 
				char* tmp = line;
287 
				line = cm_strcat(tmp, cbuf);
288 
				free(tmp);
289 
			}
290 
		}
291 
		free(line);
292 
		fclose(f);
6 nishi 293 
		return stop;
294 
	} else {
5 nishi 295 
		cm_log("Config", "Could not open the file");
4 nishi 296 
		return 1;
297 
	}
298 
}