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1 | /* |
2 | * Dolda Connect - Modular multiuser Direct Connect-style client |
3 | * Copyright (C) 2004 Fredrik Tolf (fredrik@dolda2000.com) |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by |
7 | * the Free Software Foundation; either version 2 of the License, or |
8 | * (at your option) any later version. |
9 | * |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * GNU General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, write to the Free Software |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ |
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19 | |
20 | #include <stdlib.h> |
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21 | #include <langinfo.h> |
22 | #include <stdio.h> |
23 | #include <unistd.h> |
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24 | #include <string.h> |
25 | #include <sys/types.h> |
26 | #include <errno.h> |
27 | #include <wctype.h> |
28 | #include <stddef.h> |
29 | #include <wchar.h> |
30 | #include <iconv.h> |
31 | #include <arpa/inet.h> |
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32 | #include <gdbm.h> |
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33 | |
34 | #ifdef HAVE_CONFIG_H |
35 | #include <config.h> |
36 | #endif |
37 | #include "conf.h" |
38 | #include "log.h" |
39 | #include "utils.h" |
40 | |
41 | static struct configmod *modules = NULL; |
42 | |
43 | #if 0 |
44 | static void dumpconfig(void) |
45 | { |
46 | struct configmod *mod; |
47 | struct configvar *var; |
48 | |
49 | for(mod = modules; mod != NULL; mod = mod->next) |
50 | { |
51 | printf("%s:\n", mod->name); |
52 | for(var = mod->vars; var->type != CONF_VAR_END; var++) |
53 | { |
54 | switch(var->type) |
55 | { |
56 | case CONF_VAR_BOOL: |
57 | printf("\t%s: %s\n", var->name, var->val.num?"t":"f"); |
58 | break; |
59 | case CONF_VAR_INT: |
60 | printf("\t%s: %i\n", var->name, var->val.num); |
61 | break; |
62 | case CONF_VAR_STRING: |
63 | printf("\t%s: \"%ls\" (%i)\n", var->name, var->val.str, wcslen(var->val.str)); |
64 | break; |
65 | case CONF_VAR_IPV4: |
66 | printf("\t%s: %s\n", var->name, inet_ntoa(var->val.ipv4)); |
67 | break; |
68 | } |
69 | } |
70 | } |
71 | } |
72 | #endif |
73 | |
74 | struct configvar *confgetvar(char *modname, char *varname) |
75 | { |
76 | struct configmod *m; |
77 | struct configvar *v; |
78 | |
79 | for(m = modules; m != NULL; m = m->next) |
80 | { |
81 | if(!strcmp(m->name, modname)) |
82 | { |
83 | for(v = m->vars; v->type != CONF_VAR_END; v++) |
84 | { |
85 | if(!strcmp(v->name, varname)) |
86 | return(v); |
87 | } |
88 | break; |
89 | } |
90 | } |
91 | return(NULL); |
92 | } |
93 | |
94 | void confregmod(struct configmod *mod) |
95 | { |
96 | struct configvar *var; |
97 | |
98 | for(var = mod->vars; var->type != CONF_VAR_END; var++) |
99 | { |
100 | switch(var->type) |
101 | { |
102 | case CONF_VAR_BOOL: |
103 | case CONF_VAR_INT: |
104 | var->val.num = var->defaults.num; |
105 | break; |
106 | case CONF_VAR_STRING: |
107 | if(var->defaults.str != NULL) |
108 | { |
109 | var->val.str = swcsdup(var->defaults.str); |
110 | } else { |
111 | var->val.str = NULL; |
112 | } |
113 | break; |
114 | case CONF_VAR_IPV4: |
115 | var->val.ipv4.s_addr = var->defaults.ipv4.s_addr; |
116 | break; |
117 | } |
118 | CBCHAININIT(var, conf_update); |
119 | } |
120 | mod->next = modules; |
121 | modules = mod; |
122 | } |
123 | |
124 | int runconfcmd(int argc, wchar_t **argv) |
125 | { |
126 | struct configmod *module; |
127 | struct configvar *var; |
128 | struct configcmd *cmd; |
129 | int ret, handled; |
130 | wchar_t *p; |
131 | char *cmdn, *buf, *buf2, *valbuf; |
132 | long num; |
133 | struct in_addr newipv4; |
134 | int cb; |
135 | |
136 | if(argc < 1) |
137 | return(0); |
138 | if((cmdn = icwcstombs(argv[0], "us-ascii")) == NULL) |
139 | { |
140 | flog(LOG_WARNING, "could not convert %ls to us-ascii", argv[0]); |
141 | return(1); |
142 | } |
143 | ret = 1; |
144 | handled = 0; |
145 | if(!strcmp(cmdn, "set")) |
146 | { |
147 | handled = 1; |
148 | ret = 0; |
149 | if((p = wcschr(argv[1], L'.')) == NULL) |
150 | { |
151 | flog(LOG_WARNING, "illegal configuration variable format: %ls", argv[1]); |
152 | errno = EINVAL; |
153 | free(cmdn); |
154 | return(1); |
155 | } |
156 | *(p++) = L'\0'; |
157 | if((buf = icwcstombs(argv[1], "us-ascii")) == NULL) |
158 | { |
159 | flog(LOG_WARNING, "could not convert %ls to us-ascii", argv[1]); |
160 | free(cmdn); |
161 | return(1); |
162 | } |
163 | if((buf2 = icwcstombs(p, "us-ascii")) == NULL) |
164 | { |
165 | free(buf); |
166 | flog(LOG_WARNING, "could not convert %ls to us-ascii", p); |
167 | free(cmdn); |
168 | return(1); |
169 | } |
170 | for(module = modules; module != NULL; module = module->next) |
171 | { |
172 | if(!strcmp(module->name, buf) && (module->vars != NULL)) |
173 | { |
174 | for(var = module->vars; var->type != CONF_VAR_END; var++) |
175 | { |
176 | if(!strcmp(var->name, buf2)) |
177 | { |
178 | cb = 0; |
179 | switch(var->type) |
180 | { |
181 | case CONF_VAR_BOOL: |
182 | wcstolower(argv[2]); |
183 | if(!wcscmp(argv[2], L"off") || |
184 | !wcscmp(argv[2], L"false") || |
185 | !wcscmp(argv[2], L"no") || |
186 | !wcscmp(argv[2], L"0")) |
187 | { |
188 | if(var->val.num) |
189 | cb = 1; |
190 | var->val.num = 0; |
191 | } else if(!wcscmp(argv[2], L"on") || |
192 | !wcscmp(argv[2], L"true") || |
193 | !wcscmp(argv[2], L"yes") || |
194 | !wcscmp(argv[2], L"1")) { |
195 | if(!var->val.num) |
196 | cb = 1; |
197 | var->val.num = 1; |
198 | } else { |
199 | flog(LOG_WARNING, "unrecognized boolean: %ls", argv[2]); |
200 | } |
201 | break; |
202 | case CONF_VAR_INT: |
203 | num = wcstol(argv[2], &p, 0); |
204 | if(p == argv[2]) |
205 | { |
206 | flog(LOG_WARNING, "%ls: not a number, ignoring", argv[2]); |
207 | ret = 1; |
208 | } else { |
209 | if(*p != L'\0') |
210 | flog(LOG_WARNING, "%ls: could not entirely parse as a number, ignoring trailing garbage", argv[2]); |
211 | if(num != var->val.num) |
212 | cb = 1; |
213 | var->val.num = num; |
214 | } |
215 | break; |
216 | case CONF_VAR_STRING: |
217 | if(wcscmp(var->val.str, argv[2])) |
218 | cb = 1; |
219 | free(var->val.str); |
220 | var->val.str = swcsdup(argv[2]); |
221 | break; |
222 | case CONF_VAR_IPV4: |
223 | if((valbuf = icwcstombs(argv[2], "us-ascii")) == NULL) |
224 | { |
225 | flog(LOG_WARNING, "could not convert IPv4 address to as-ascii in var %s, ignoring", buf2); |
226 | } else { |
227 | if(!inet_aton(valbuf, &newipv4)) |
228 | { |
229 | flog(LOG_WARNING, "could not parse IPv4 address (%s), ignoring", valbuf); |
230 | memcpy(&var->val.ipv4, &var->defaults.ipv4, sizeof(var->val.ipv4)); |
231 | } else { |
232 | if(memcmp(&newipv4, &var->val.ipv4, sizeof(newipv4))) |
233 | cb = 1; |
234 | memcpy(&var->val.ipv4, &newipv4, sizeof(newipv4)); |
235 | } |
236 | free(valbuf); |
237 | } |
238 | break; |
239 | } |
240 | if(cb) |
241 | CBCHAINDOCB(var, conf_update, var); |
242 | break; |
243 | } |
244 | } |
245 | if(var == NULL) |
246 | flog(LOG_WARNING, "variable %s not found, ignoring set command", buf2); |
247 | break; |
248 | } |
249 | } |
250 | if(module == NULL) |
251 | flog(LOG_WARNING, "module %s not found, ignoring set command", buf); |
252 | free(buf2); |
253 | free(buf); |
254 | } |
255 | for(module = modules; !handled && (module != NULL); module = module->next) |
256 | { |
257 | if(module->cmds != NULL) |
258 | { |
259 | for(cmd = module->cmds; cmd->name != NULL; cmd++) |
260 | { |
261 | if(!strcmp(cmd->name, cmdn)) |
262 | { |
263 | handled = 1; |
264 | ret = cmd->handler(argc, argv); |
265 | break; |
266 | } |
267 | } |
268 | } |
269 | } |
270 | if(!handled) |
271 | flog(LOG_WARNING, "command not found: %s", cmdn); |
272 | free(cmdn); |
273 | return(ret); |
274 | } |
275 | |
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276 | void readconfig(FILE *stream) |
277 | { |
278 | int state; |
279 | wint_t c; |
280 | wchar_t *words[16]; |
281 | wchar_t *buf, *p, *p2; |
282 | int w; |
283 | int line; |
284 | |
285 | buf = smalloc(sizeof(wchar_t) * 1024); |
286 | state = 0; |
287 | c = getwc(stream); |
288 | w = 0; |
289 | line = 1; |
290 | p = buf; |
291 | while(c != WEOF) |
292 | { |
293 | if(c == '#') |
294 | { |
295 | do |
296 | c = getwc(stream); |
297 | while((c != WEOF) && (c != L'\n')); |
298 | continue; |
299 | } |
300 | switch(state) |
301 | { |
302 | case 0: |
303 | if(iswspace(c)) |
304 | { |
305 | if(c == L'\n') |
306 | { |
307 | line++; |
308 | if(runconfcmd(w, words)) |
309 | flog(LOG_WARNING, "ignoring this command on line %i", line); |
310 | w = 0; |
311 | } |
312 | c = getwc(stream); |
313 | } else { |
314 | state = 1; |
315 | p2 = p; |
316 | } |
317 | break; |
318 | case 1: |
319 | if(c == L'\"') |
320 | { |
321 | state = 2; |
322 | c = getwc(stream); |
323 | } else if(iswspace(c)) { |
324 | if(w >= 16) |
325 | { |
326 | flog(LOG_WARNING, "too many words on config line %i, ignoring rest", line); |
327 | } else { |
328 | *(p++) = L'\0'; |
329 | words[w++] = p2; |
330 | } |
331 | state = 0; |
332 | } else { |
333 | if(c == L'\\') |
334 | c = getwc(stream); |
335 | if(p - buf < 1023) |
336 | *(p++) = c; |
337 | else |
338 | flog(LOG_WARNING, "too many characters on config line %i, ignoring rest", line); |
339 | c = getwc(stream); |
340 | } |
341 | break; |
342 | case 2: |
343 | if(c == L'\"') |
344 | { |
345 | c = getwc(stream); |
346 | state = 1; |
347 | } else { |
348 | if(c == L'\\') |
349 | c = getwc(stream); |
350 | if(p - buf < 1023) |
351 | *(p++) = c; |
352 | else |
353 | flog(LOG_WARNING, "too many characters on config line %i, ignoring rest", line); |
354 | c = getwc(stream); |
355 | } |
356 | break; |
357 | } |
358 | } |
359 | free(buf); |
360 | if(ferror(stream)) |
361 | flog(LOG_WARNING, "error on configuration stream: %s", strerror(errno)); |
362 | if(state != 0) |
363 | flog(LOG_WARNING, "unexpected end of file"); |
364 | } |
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365 | |
366 | /* {store,fetch}var re-opens the database every time, just in case two |
367 | * doldacond processes would be running simultaneously. */ |
368 | void storevar(char *key, void *val, size_t len) |
369 | { |
370 | char *dbname; |
371 | GDBM_FILE db; |
372 | datum k, v; |
373 | |
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374 | dbname = findfile("dc-vardb", NULL, 1); |
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375 | if((db = gdbm_open(dbname, 0, GDBM_WRCREAT, 0666, NULL)) == NULL) |
376 | { |
377 | flog(LOG_CRIT, "could not open var database for writing, cannot continue: %s", gdbm_strerror(gdbm_errno)); |
378 | abort(); |
379 | } |
380 | free(dbname); |
381 | k.dptr = key; |
382 | k.dsize = strlen(key); |
383 | v.dptr = val; |
384 | v.dsize = len; |
385 | gdbm_store(db, k, v, GDBM_REPLACE); |
386 | gdbm_close(db); |
387 | } |
388 | |
389 | void *fetchvar(char *key, size_t *lenb) |
390 | { |
391 | char *dbname; |
392 | GDBM_FILE db; |
393 | datum k, v; |
394 | |
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395 | if((dbname = findfile("dc-vardb", NULL, 0)) == NULL) |
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396 | return(NULL); |
397 | if((db = gdbm_open(dbname, 0, GDBM_READER, 0666, NULL)) == NULL) |
398 | return(NULL); |
399 | free(dbname); |
400 | k.dptr = key; |
401 | k.dsize = strlen(key); |
402 | v = gdbm_fetch(db, k); |
403 | gdbm_close(db); |
404 | if(v.dptr == NULL) |
405 | return(NULL); |
406 | if(lenb != NULL) |
407 | *lenb = v.dsize; |
408 | return(v.dptr); |
409 | } |