| 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 | */ |
| 19 | |
| 20 | #include <stdlib.h> |
| 21 | #include <langinfo.h> |
| 22 | #include <stdio.h> |
| 23 | #include <unistd.h> |
| 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> |
| 32 | #include <gdbm.h> |
| 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 | |
| 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 | } |
| 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 | |
| 374 | dbname = findfile("dc-vardb", NULL, 1); |
| 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 | |
| 395 | if((dbname = findfile("dc-vardb", NULL, 0)) == NULL) |
| 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 | } |