| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-2010 Richard Kettlewell |
| 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 3 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, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | /** @file lib/client.c |
| 19 | * @brief Simple C client |
| 20 | * |
| 21 | * See @ref lib/eclient.c for an asynchronous-capable client |
| 22 | * implementation. |
| 23 | */ |
| 24 | |
| 25 | #include "common.h" |
| 26 | |
| 27 | #include <sys/types.h> |
| 28 | #include <sys/socket.h> |
| 29 | #include <netinet/in.h> |
| 30 | #include <sys/un.h> |
| 31 | #include <unistd.h> |
| 32 | #include <errno.h> |
| 33 | #include <netdb.h> |
| 34 | #include <pcre.h> |
| 35 | |
| 36 | #include "log.h" |
| 37 | #include "mem.h" |
| 38 | #include "queue.h" |
| 39 | #include "client.h" |
| 40 | #include "charset.h" |
| 41 | #include "hex.h" |
| 42 | #include "split.h" |
| 43 | #include "vector.h" |
| 44 | #include "inputline.h" |
| 45 | #include "kvp.h" |
| 46 | #include "syscalls.h" |
| 47 | #include "printf.h" |
| 48 | #include "sink.h" |
| 49 | #include "addr.h" |
| 50 | #include "authhash.h" |
| 51 | #include "client-common.h" |
| 52 | #include "rights.h" |
| 53 | #include "kvp.h" |
| 54 | |
| 55 | /** @brief Client handle contents */ |
| 56 | struct disorder_client { |
| 57 | /** @brief Stream to read from */ |
| 58 | FILE *fpin; |
| 59 | /** @brief Stream to write to */ |
| 60 | FILE *fpout; |
| 61 | /** @brief Peer description */ |
| 62 | char *ident; |
| 63 | /** @brief Username */ |
| 64 | char *user; |
| 65 | /** @brief Report errors to @c stderr */ |
| 66 | int verbose; |
| 67 | /** @brief Last error string */ |
| 68 | const char *last; |
| 69 | /** @brief Address family */ |
| 70 | int family; |
| 71 | }; |
| 72 | |
| 73 | /** @brief Create a new client |
| 74 | * @param verbose If nonzero, write extra junk to stderr |
| 75 | * @return Pointer to new client |
| 76 | * |
| 77 | * You must call disorder_connect(), disorder_connect_user() or |
| 78 | * disorder_connect_cookie() to connect it. Use disorder_close() to |
| 79 | * dispose of the client when finished with it. |
| 80 | */ |
| 81 | disorder_client *disorder_new(int verbose) { |
| 82 | disorder_client *c = xmalloc(sizeof (struct disorder_client)); |
| 83 | |
| 84 | c->verbose = verbose; |
| 85 | c->family = -1; |
| 86 | return c; |
| 87 | } |
| 88 | |
| 89 | /** @brief Return the address family used by this client */ |
| 90 | int disorder_client_af(disorder_client *c) { |
| 91 | return c->family; |
| 92 | } |
| 93 | |
| 94 | /** @brief Read a response line |
| 95 | * @param c Client |
| 96 | * @param rp Where to store response, or NULL (UTF-8) |
| 97 | * @return Response code 0-999 or -1 on error |
| 98 | */ |
| 99 | static int response(disorder_client *c, char **rp) { |
| 100 | char *r; |
| 101 | |
| 102 | if(inputline(c->ident, c->fpin, &r, '\n')) { |
| 103 | byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); |
| 104 | return -1; |
| 105 | } |
| 106 | D(("response: %s", r)); |
| 107 | if(rp) |
| 108 | *rp = r; |
| 109 | if(r[0] >= '0' && r[0] <= '9' |
| 110 | && r[1] >= '0' && r[1] <= '9' |
| 111 | && r[2] >= '0' && r[2] <= '9' |
| 112 | && r[3] == ' ') { |
| 113 | c->last = r + 4; |
| 114 | return (r[0] * 10 + r[1]) * 10 + r[2] - 111 * '0'; |
| 115 | } else { |
| 116 | c->last = "invalid reply format"; |
| 117 | disorder_error(0, "invalid reply format from %s", c->ident); |
| 118 | return -1; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** @brief Return last response string |
| 123 | * @param c Client |
| 124 | * @return Last response string (UTF-8, English) or NULL |
| 125 | */ |
| 126 | const char *disorder_last(disorder_client *c) { |
| 127 | return c->last; |
| 128 | } |
| 129 | |
| 130 | /** @brief Read and partially parse a response |
| 131 | * @param c Client |
| 132 | * @param rp Where to store response text (or NULL) (UTF-8) |
| 133 | * @return 0 on success, non-0 on error |
| 134 | * |
| 135 | * 5xx responses count as errors. |
| 136 | * |
| 137 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 138 | * commentary for a command where it would normally be meaningful). |
| 139 | * |
| 140 | * NB that the response will NOT be converted to the local encoding. |
| 141 | */ |
| 142 | static int check_response(disorder_client *c, char **rp) { |
| 143 | int rc; |
| 144 | char *r; |
| 145 | |
| 146 | if((rc = response(c, &r)) == -1) |
| 147 | return -1; |
| 148 | else if(rc / 100 == 2) { |
| 149 | if(rp) |
| 150 | *rp = (rc % 10 == 9) ? 0 : xstrdup(r + 4); |
| 151 | xfree(r); |
| 152 | return 0; |
| 153 | } else { |
| 154 | if(c->verbose) |
| 155 | disorder_error(0, "from %s: %s", c->ident, utf82mb(r)); |
| 156 | xfree(r); |
| 157 | return rc; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /** @brief Issue a command and parse a simple response |
| 162 | * @param c Client |
| 163 | * @param rp Where to store result, or NULL |
| 164 | * @param cmd Command |
| 165 | * @param ap Arguments (UTF-8), terminated by (char *)0 |
| 166 | * @return 0 on success, non-0 on error |
| 167 | * |
| 168 | * 5xx responses count as errors. |
| 169 | * |
| 170 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 171 | * commentary for a command where it would normally be meaningful). |
| 172 | * |
| 173 | * NB that the response will NOT be converted to the local encoding |
| 174 | * nor will quotes be stripped. See dequote(). |
| 175 | * |
| 176 | * Put @ref disorder__body in the argument list followed by a char ** |
| 177 | * and int giving the body to follow the command. If the int is @c -1 |
| 178 | * then the list is assumed to be NULL-terminated. This may be used |
| 179 | * only once. |
| 180 | * |
| 181 | * Put @ref disorder__list in the argument list followed by a char ** |
| 182 | * and int giving a list of arguments to include. If the int is @c -1 |
| 183 | * then the list is assumed to be NULL-terminated. This may be used |
| 184 | * any number of times. |
| 185 | * |
| 186 | * Put @ref disorder__integer in the argument list followed by a long to |
| 187 | * send its value in decimal. This may be used any number of times. |
| 188 | * |
| 189 | * Put @ref disorder__time in the argument list followed by a time_t |
| 190 | * to send its value in decimal. This may be used any number of |
| 191 | * times. |
| 192 | * |
| 193 | * Usually you would call this via one of the following interfaces: |
| 194 | * - disorder_simple() |
| 195 | */ |
| 196 | static int disorder_simple_v(disorder_client *c, |
| 197 | char **rp, |
| 198 | const char *cmd, |
| 199 | va_list ap) { |
| 200 | const char *arg; |
| 201 | struct dynstr d; |
| 202 | char **body = NULL; |
| 203 | int nbody = 0; |
| 204 | int has_body = 0; |
| 205 | |
| 206 | if(!c->fpout) { |
| 207 | c->last = "not connected"; |
| 208 | disorder_error(0, "not connected to server"); |
| 209 | return -1; |
| 210 | } |
| 211 | if(cmd) { |
| 212 | dynstr_init(&d); |
| 213 | dynstr_append_string(&d, cmd); |
| 214 | while((arg = va_arg(ap, const char *))) { |
| 215 | if(arg == disorder__body) { |
| 216 | body = va_arg(ap, char **); |
| 217 | nbody = va_arg(ap, int); |
| 218 | has_body = 1; |
| 219 | } else if(arg == disorder__list) { |
| 220 | char **list = va_arg(ap, char **); |
| 221 | int nlist = va_arg(ap, int); |
| 222 | if(nlist < 0) { |
| 223 | for(nlist = 0; list[nlist]; ++nlist) |
| 224 | ; |
| 225 | } |
| 226 | for(int n = 0; n < nlist; ++n) { |
| 227 | dynstr_append(&d, ' '); |
| 228 | dynstr_append_string(&d, quoteutf8(arg)); |
| 229 | } |
| 230 | } else if(arg == disorder__integer) { |
| 231 | long n = va_arg(ap, long); |
| 232 | char buffer[16]; |
| 233 | snprintf(buffer, sizeof buffer, "%ld", n); |
| 234 | dynstr_append(&d, ' '); |
| 235 | dynstr_append_string(&d, buffer); |
| 236 | } else if(arg == disorder__time) { |
| 237 | time_t n = va_arg(ap, time_t); |
| 238 | char buffer[16]; |
| 239 | snprintf(buffer, sizeof buffer, "%lld", (long long)n); |
| 240 | dynstr_append(&d, ' '); |
| 241 | dynstr_append_string(&d, buffer); |
| 242 | } else { |
| 243 | dynstr_append(&d, ' '); |
| 244 | dynstr_append_string(&d, quoteutf8(arg)); |
| 245 | } |
| 246 | } |
| 247 | dynstr_append(&d, '\n'); |
| 248 | dynstr_terminate(&d); |
| 249 | D(("command: %s", d.vec)); |
| 250 | if(fputs(d.vec, c->fpout) < 0) |
| 251 | goto write_error; |
| 252 | xfree(d.vec); |
| 253 | if(has_body) { |
| 254 | if(nbody < 0) |
| 255 | for(nbody = 0; body[nbody]; ++nbody) |
| 256 | ; |
| 257 | for(int n = 0; n < nbody; ++n) { |
| 258 | if(body[n][0] == '.') |
| 259 | if(fputc('.', c->fpout) < 0) |
| 260 | goto write_error; |
| 261 | if(fputs(body[n], c->fpout) < 0) |
| 262 | goto write_error; |
| 263 | if(fputc('\n', c->fpout) < 0) |
| 264 | goto write_error; |
| 265 | } |
| 266 | if(fputs(".\n", c->fpout) < 0) |
| 267 | goto write_error; |
| 268 | } |
| 269 | if(fflush(c->fpout)) |
| 270 | goto write_error; |
| 271 | } |
| 272 | return check_response(c, rp); |
| 273 | write_error: |
| 274 | byte_xasprintf((char **)&c->last, "write error: %s", strerror(errno)); |
| 275 | disorder_error(errno, "error writing to %s", c->ident); |
| 276 | return -1; |
| 277 | } |
| 278 | |
| 279 | /** @brief Issue a command and parse a simple response |
| 280 | * @param c Client |
| 281 | * @param rp Where to store result, or NULL (UTF-8) |
| 282 | * @param cmd Command |
| 283 | * @return 0 on success, non-0 on error |
| 284 | * |
| 285 | * The remaining arguments are command arguments, terminated by (char |
| 286 | * *)0. They should be in UTF-8. |
| 287 | * |
| 288 | * 5xx responses count as errors. |
| 289 | * |
| 290 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 291 | * commentary for a command where it would normally be meaningful). |
| 292 | * |
| 293 | * NB that the response will NOT be converted to the local encoding |
| 294 | * nor will quotes be stripped. See dequote(). |
| 295 | */ |
| 296 | static int disorder_simple(disorder_client *c, |
| 297 | char **rp, |
| 298 | const char *cmd, ...) { |
| 299 | va_list ap; |
| 300 | int ret; |
| 301 | |
| 302 | va_start(ap, cmd); |
| 303 | ret = disorder_simple_v(c, rp, cmd, ap); |
| 304 | va_end(ap); |
| 305 | return ret; |
| 306 | } |
| 307 | |
| 308 | /** @brief Issue a command and split the response |
| 309 | * @param c Client |
| 310 | * @param vecp Where to store results |
| 311 | * @param nvecp Where to store count of results |
| 312 | * @param expected Expected count (or -1 to not check) |
| 313 | * @param cmd Command |
| 314 | * @return 0 on success, non-0 on error |
| 315 | * |
| 316 | * The remaining arguments are command arguments, terminated by (char |
| 317 | * *)0. They should be in UTF-8. |
| 318 | * |
| 319 | * 5xx responses count as errors. |
| 320 | * |
| 321 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 322 | * commentary for a command where it would normally be meaningful). |
| 323 | * |
| 324 | * NB that the response will NOT be converted to the local encoding |
| 325 | * nor will quotes be stripped. See dequote(). |
| 326 | */ |
| 327 | static int disorder_simple_split(disorder_client *c, |
| 328 | char ***vecp, |
| 329 | int *nvecp, |
| 330 | int expected, |
| 331 | const char *cmd, ...) { |
| 332 | va_list ap; |
| 333 | int ret; |
| 334 | char *r; |
| 335 | char **vec; |
| 336 | int nvec; |
| 337 | |
| 338 | va_start(ap, cmd); |
| 339 | ret = disorder_simple_v(c, &r, cmd, ap); |
| 340 | va_end(ap); |
| 341 | if(!ret) { |
| 342 | vec = split(r, &nvec, SPLIT_QUOTES, 0, 0); |
| 343 | xfree(r); |
| 344 | if(expected < 0 || nvec == expected) { |
| 345 | *vecp = vec; |
| 346 | *nvecp = nvec; |
| 347 | } else { |
| 348 | disorder_error(0, "malformed reply to %s", cmd); |
| 349 | c->last = "malformed reply"; |
| 350 | ret = -1; |
| 351 | free_strings(nvec, vec); |
| 352 | } |
| 353 | } |
| 354 | if(ret) { |
| 355 | *vecp = NULL; |
| 356 | *nvecp = 0; |
| 357 | } |
| 358 | return ret; |
| 359 | } |
| 360 | |
| 361 | /** @brief Dequote a result string |
| 362 | * @param rc 0 on success, non-0 on error |
| 363 | * @param rp Where result string is stored (UTF-8) |
| 364 | * @return @p rc |
| 365 | * |
| 366 | * This is used as a wrapper around disorder_simple() to dequote |
| 367 | * results in place. |
| 368 | */ |
| 369 | static int dequote(int rc, char **rp) { |
| 370 | char **rr; |
| 371 | |
| 372 | if(!rc) { |
| 373 | if((rr = split(*rp, 0, SPLIT_QUOTES, 0, 0)) && *rr) { |
| 374 | xfree(*rp); |
| 375 | *rp = *rr; |
| 376 | xfree(rr); |
| 377 | return 0; |
| 378 | } |
| 379 | disorder_error(0, "invalid reply: %s", *rp); |
| 380 | } |
| 381 | return rc; |
| 382 | } |
| 383 | |
| 384 | /** @brief Generic connection routine |
| 385 | * @param conf Configuration to follow |
| 386 | * @param c Client |
| 387 | * @param username Username to log in with or NULL |
| 388 | * @param password Password to log in with or NULL |
| 389 | * @param cookie Cookie to log in with or NULL |
| 390 | * @return 0 on success, non-0 on error |
| 391 | * |
| 392 | * @p cookie is tried first if not NULL. If it is NULL then @p |
| 393 | * username must not be. If @p username is not NULL then nor may @p |
| 394 | * password be. |
| 395 | */ |
| 396 | int disorder_connect_generic(struct config *conf, |
| 397 | disorder_client *c, |
| 398 | const char *username, |
| 399 | const char *password, |
| 400 | const char *cookie) { |
| 401 | int fd = -1, fd2 = -1, nrvec = 0, rc; |
| 402 | unsigned char *nonce = NULL; |
| 403 | size_t nl; |
| 404 | char *res = NULL; |
| 405 | char *r = NULL, **rvec = NULL; |
| 406 | const char *protocol, *algorithm, *challenge; |
| 407 | struct sockaddr *sa = NULL; |
| 408 | socklen_t salen; |
| 409 | |
| 410 | if((salen = find_server(conf, &sa, &c->ident)) == (socklen_t)-1) |
| 411 | return -1; |
| 412 | c->fpin = c->fpout = 0; |
| 413 | if((fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) { |
| 414 | byte_xasprintf((char **)&c->last, "socket: %s", strerror(errno)); |
| 415 | disorder_error(errno, "error calling socket"); |
| 416 | return -1; |
| 417 | } |
| 418 | c->family = sa->sa_family; |
| 419 | if(connect(fd, sa, salen) < 0) { |
| 420 | byte_xasprintf((char **)&c->last, "connect: %s", strerror(errno)); |
| 421 | disorder_error(errno, "error calling connect"); |
| 422 | goto error; |
| 423 | } |
| 424 | if((fd2 = dup(fd)) < 0) { |
| 425 | byte_xasprintf((char **)&c->last, "dup: %s", strerror(errno)); |
| 426 | disorder_error(errno, "error calling dup"); |
| 427 | goto error; |
| 428 | } |
| 429 | if(!(c->fpin = fdopen(fd, "rb"))) { |
| 430 | byte_xasprintf((char **)&c->last, "fdopen: %s", strerror(errno)); |
| 431 | disorder_error(errno, "error calling fdopen"); |
| 432 | goto error; |
| 433 | } |
| 434 | fd = -1; |
| 435 | if(!(c->fpout = fdopen(fd2, "wb"))) { |
| 436 | byte_xasprintf((char **)&c->last, "fdopen: %s", strerror(errno)); |
| 437 | disorder_error(errno, "error calling fdopen"); |
| 438 | goto error; |
| 439 | } |
| 440 | fd2 = -1; |
| 441 | if((rc = disorder_simple(c, &r, 0, (const char *)0))) |
| 442 | goto error_rc; |
| 443 | if(!(rvec = split(r, &nrvec, SPLIT_QUOTES, 0, 0))) |
| 444 | goto error; |
| 445 | if(nrvec != 3) { |
| 446 | c->last = "cannot parse server greeting"; |
| 447 | disorder_error(0, "cannot parse server greeting %s", r); |
| 448 | goto error; |
| 449 | } |
| 450 | protocol = rvec[0]; |
| 451 | if(strcmp(protocol, "2")) { |
| 452 | c->last = "unknown protocol version"; |
| 453 | disorder_error(0, "unknown protocol version: %s", protocol); |
| 454 | goto error; |
| 455 | } |
| 456 | algorithm = rvec[1]; |
| 457 | challenge = rvec[2]; |
| 458 | if(!(nonce = unhex(challenge, &nl))) |
| 459 | goto error; |
| 460 | if(cookie) { |
| 461 | if(!dequote(disorder_simple(c, &c->user, "cookie", cookie, (char *)0), |
| 462 | &c->user)) |
| 463 | return 0; /* success */ |
| 464 | if(!username) { |
| 465 | c->last = "cookie failed and no username"; |
| 466 | disorder_error(0, "cookie did not work and no username available"); |
| 467 | goto error; |
| 468 | } |
| 469 | } |
| 470 | if(!(res = authhash(nonce, nl, password, algorithm))) { |
| 471 | c->last = "error computing authorization hash"; |
| 472 | goto error; |
| 473 | } |
| 474 | if((rc = disorder_simple(c, 0, "user", username, res, (char *)0))) |
| 475 | goto error_rc; |
| 476 | c->user = xstrdup(username); |
| 477 | xfree(res); |
| 478 | free_strings(nrvec, rvec); |
| 479 | xfree(nonce); |
| 480 | xfree(sa); |
| 481 | xfree(r); |
| 482 | return 0; |
| 483 | error: |
| 484 | rc = -1; |
| 485 | error_rc: |
| 486 | if(c->fpin) { |
| 487 | fclose(c->fpin); |
| 488 | c->fpin = 0; |
| 489 | } |
| 490 | if(c->fpout) { |
| 491 | fclose(c->fpout); |
| 492 | c->fpout = 0; |
| 493 | } |
| 494 | if(fd2 != -1) close(fd2); |
| 495 | if(fd != -1) close(fd); |
| 496 | return rc; |
| 497 | } |
| 498 | |
| 499 | /** @brief Connect a client with a specified username and password |
| 500 | * @param c Client |
| 501 | * @param username Username to log in with |
| 502 | * @param password Password to log in with |
| 503 | * @return 0 on success, non-0 on error |
| 504 | */ |
| 505 | int disorder_connect_user(disorder_client *c, |
| 506 | const char *username, |
| 507 | const char *password) { |
| 508 | return disorder_connect_generic(config, |
| 509 | c, |
| 510 | username, |
| 511 | password, |
| 512 | 0); |
| 513 | } |
| 514 | |
| 515 | /** @brief Connect a client |
| 516 | * @param c Client |
| 517 | * @return 0 on success, non-0 on error |
| 518 | * |
| 519 | * The connection will use the username and password found in @ref |
| 520 | * config, or directly from the database if no password is found and |
| 521 | * the database is readable (usually only for root). |
| 522 | */ |
| 523 | int disorder_connect(disorder_client *c) { |
| 524 | const char *username, *password; |
| 525 | |
| 526 | if(!(username = config->username)) { |
| 527 | c->last = "no username"; |
| 528 | disorder_error(0, "no username configured"); |
| 529 | return -1; |
| 530 | } |
| 531 | password = config->password; |
| 532 | /* If we're connecting as 'root' guess that we're the system root |
| 533 | * user (or the jukebox user), both of which can use the privileged |
| 534 | * socket. They can also furtle with the db directly: that is why |
| 535 | * privileged socket does not represent a privilege escalation. */ |
| 536 | if(!password |
| 537 | && !strcmp(username, "root")) |
| 538 | password = "anything will do for root"; |
| 539 | if(!password) { |
| 540 | /* Oh well */ |
| 541 | c->last = "no password"; |
| 542 | disorder_error(0, "no password configured for user '%s'", username); |
| 543 | return -1; |
| 544 | } |
| 545 | return disorder_connect_generic(config, |
| 546 | c, |
| 547 | username, |
| 548 | password, |
| 549 | 0); |
| 550 | } |
| 551 | |
| 552 | /** @brief Connect a client |
| 553 | * @param c Client |
| 554 | * @param cookie Cookie to log in with, or NULL |
| 555 | * @return 0 on success, non-0 on error |
| 556 | * |
| 557 | * If @p cookie is NULL or does not work then we attempt to log in as |
| 558 | * guest instead (so when the cookie expires only an extra round trip |
| 559 | * is needed rathre than a complete new login). |
| 560 | */ |
| 561 | int disorder_connect_cookie(disorder_client *c, |
| 562 | const char *cookie) { |
| 563 | return disorder_connect_generic(config, |
| 564 | c, |
| 565 | "guest", |
| 566 | "", |
| 567 | cookie); |
| 568 | } |
| 569 | |
| 570 | /** @brief Close a client |
| 571 | * @param c Client |
| 572 | * @return 0 on succcess, non-0 on errior |
| 573 | * |
| 574 | * The client is still closed even on error. It might well be |
| 575 | * appropriate to ignore the return value. |
| 576 | */ |
| 577 | int disorder_close(disorder_client *c) { |
| 578 | int ret = 0; |
| 579 | |
| 580 | if(c->fpin) { |
| 581 | if(fclose(c->fpin) < 0) { |
| 582 | byte_xasprintf((char **)&c->last, "fclose: %s", strerror(errno)); |
| 583 | disorder_error(errno, "error calling fclose"); |
| 584 | ret = -1; |
| 585 | } |
| 586 | c->fpin = 0; |
| 587 | } |
| 588 | if(c->fpout) { |
| 589 | if(fclose(c->fpout) < 0) { |
| 590 | byte_xasprintf((char **)&c->last, "fclose: %s", strerror(errno)); |
| 591 | disorder_error(errno, "error calling fclose"); |
| 592 | ret = -1; |
| 593 | } |
| 594 | c->fpout = 0; |
| 595 | } |
| 596 | xfree(c->ident); |
| 597 | c->ident = 0; |
| 598 | xfree(c->user); |
| 599 | c->user = 0; |
| 600 | return ret; |
| 601 | } |
| 602 | |
| 603 | static void client_error(const char *msg, |
| 604 | void attribute((unused)) *u) { |
| 605 | disorder_error(0, "error parsing reply: %s", msg); |
| 606 | } |
| 607 | |
| 608 | /** @brief Get a single queue entry |
| 609 | * @param c Client |
| 610 | * @param cmd Command |
| 611 | * @param qp Where to store track information |
| 612 | * @return 0 on success, non-0 on error |
| 613 | */ |
| 614 | static int onequeue(disorder_client *c, const char *cmd, |
| 615 | struct queue_entry **qp) { |
| 616 | char *r; |
| 617 | struct queue_entry *q; |
| 618 | int rc; |
| 619 | |
| 620 | if((rc = disorder_simple(c, &r, cmd, (char *)0))) |
| 621 | return rc; |
| 622 | if(r) { |
| 623 | q = xmalloc(sizeof *q); |
| 624 | if(queue_unmarshall(q, r, client_error, 0)) |
| 625 | return -1; |
| 626 | *qp = q; |
| 627 | } else |
| 628 | *qp = 0; |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | /** @brief Fetch the queue, recent list, etc */ |
| 633 | static int readqueue(disorder_client *c, |
| 634 | struct queue_entry **qp) { |
| 635 | struct queue_entry *qh, **qt = &qh, *q; |
| 636 | char *l; |
| 637 | |
| 638 | while(inputline(c->ident, c->fpin, &l, '\n') >= 0) { |
| 639 | if(!strcmp(l, ".")) { |
| 640 | *qt = 0; |
| 641 | *qp = qh; |
| 642 | xfree(l); |
| 643 | return 0; |
| 644 | } |
| 645 | q = xmalloc(sizeof *q); |
| 646 | if(!queue_unmarshall(q, l, client_error, 0)) { |
| 647 | *qt = q; |
| 648 | qt = &q->next; |
| 649 | } |
| 650 | xfree(l); |
| 651 | } |
| 652 | if(ferror(c->fpin)) { |
| 653 | byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); |
| 654 | disorder_error(errno, "error reading %s", c->ident); |
| 655 | } else { |
| 656 | c->last = "input error: unexpected EOF"; |
| 657 | disorder_error(0, "error reading %s: unexpected EOF", c->ident); |
| 658 | } |
| 659 | return -1; |
| 660 | } |
| 661 | |
| 662 | /** @brief Read a dot-stuffed list |
| 663 | * @param c Client |
| 664 | * @param vecp Where to store list (UTF-8) |
| 665 | * @param nvecp Where to store number of items, or NULL |
| 666 | * @return 0 on success, non-0 on error |
| 667 | * |
| 668 | * The list will have a final NULL not counted in @p nvecp. |
| 669 | */ |
| 670 | static int readlist(disorder_client *c, char ***vecp, int *nvecp) { |
| 671 | char *l; |
| 672 | struct vector v; |
| 673 | |
| 674 | vector_init(&v); |
| 675 | while(inputline(c->ident, c->fpin, &l, '\n') >= 0) { |
| 676 | if(!strcmp(l, ".")) { |
| 677 | vector_terminate(&v); |
| 678 | if(nvecp) |
| 679 | *nvecp = v.nvec; |
| 680 | *vecp = v.vec; |
| 681 | xfree(l); |
| 682 | return 0; |
| 683 | } |
| 684 | vector_append(&v, xstrdup(l + (*l == '.'))); |
| 685 | xfree(l); |
| 686 | } |
| 687 | if(ferror(c->fpin)) { |
| 688 | byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); |
| 689 | disorder_error(errno, "error reading %s", c->ident); |
| 690 | } else { |
| 691 | c->last = "input error: unexpxected EOF"; |
| 692 | disorder_error(0, "error reading %s: unexpected EOF", c->ident); |
| 693 | } |
| 694 | return -1; |
| 695 | } |
| 696 | |
| 697 | /** @brief Return the user we logged in with |
| 698 | * @param c Client |
| 699 | * @return User name (owned by @p c, don't modify) |
| 700 | */ |
| 701 | char *disorder_user(disorder_client *c) { |
| 702 | return c->user; |
| 703 | } |
| 704 | |
| 705 | static void pairlist_error_handler(const char *msg, |
| 706 | void attribute((unused)) *u) { |
| 707 | disorder_error(0, "error handling key-value pair reply: %s", msg); |
| 708 | } |
| 709 | |
| 710 | /** @brief Get a list of key-value pairs |
| 711 | * @param c Client |
| 712 | * @param kp Where to store linked list of preferences |
| 713 | * @param cmd Command |
| 714 | * @param ... Arguments |
| 715 | * @return 0 on success, non-0 on error |
| 716 | */ |
| 717 | static int pairlist(disorder_client *c, struct kvp **kp, const char *cmd, ...) { |
| 718 | char **vec, **pvec; |
| 719 | int nvec, npvec, n, rc; |
| 720 | struct kvp *k; |
| 721 | va_list ap; |
| 722 | |
| 723 | va_start(ap, cmd); |
| 724 | rc = disorder_simple_v(c, 0, cmd, ap); |
| 725 | va_end(ap); |
| 726 | if(rc) |
| 727 | return rc; |
| 728 | if((rc = readlist(c, &vec, &nvec))) |
| 729 | return rc; |
| 730 | for(n = 0; n < nvec; ++n) { |
| 731 | if(!(pvec = split(vec[n], &npvec, SPLIT_QUOTES, pairlist_error_handler, 0))) |
| 732 | return -1; |
| 733 | if(npvec != 2) { |
| 734 | pairlist_error_handler("malformed response", 0); |
| 735 | return -1; |
| 736 | } |
| 737 | *kp = k = xmalloc(sizeof *k); |
| 738 | k->name = pvec[0]; |
| 739 | k->value = pvec[1]; |
| 740 | kp = &k->next; |
| 741 | xfree(pvec); |
| 742 | } |
| 743 | free_strings(nvec, vec); |
| 744 | *kp = 0; |
| 745 | return 0; |
| 746 | } |
| 747 | |
| 748 | /** @brief Parse a boolean response |
| 749 | * @param cmd Command for use in error messsage |
| 750 | * @param value Result from server |
| 751 | * @param flagp Where to store result |
| 752 | * @return 0 on success, non-0 on error |
| 753 | */ |
| 754 | static int boolean(const char *cmd, const char *value, |
| 755 | int *flagp) { |
| 756 | if(!strcmp(value, "yes")) *flagp = 1; |
| 757 | else if(!strcmp(value, "no")) *flagp = 0; |
| 758 | else { |
| 759 | disorder_error(0, "malformed response to '%s'", cmd); |
| 760 | return -1; |
| 761 | } |
| 762 | return 0; |
| 763 | } |
| 764 | |
| 765 | /** @brief Log to a sink |
| 766 | * @param c Client |
| 767 | * @param s Sink to write log lines to |
| 768 | * @return 0 on success, non-0 on error |
| 769 | */ |
| 770 | int disorder_log(disorder_client *c, struct sink *s) { |
| 771 | char *l; |
| 772 | int rc; |
| 773 | |
| 774 | if((rc = disorder_simple(c, 0, "log", (char *)0))) |
| 775 | return rc; |
| 776 | while(inputline(c->ident, c->fpin, &l, '\n') >= 0 && strcmp(l, ".")) |
| 777 | if(sink_printf(s, "%s\n", l) < 0) return -1; |
| 778 | if(ferror(c->fpin) || feof(c->fpin)) { |
| 779 | byte_xasprintf((char **)&c->last, "input error: %s", |
| 780 | ferror(c->fpin) ? strerror(errno) : "unexpxected EOF"); |
| 781 | return -1; |
| 782 | } |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | #include "client-stubs.c" |
| 787 | |
| 788 | /* |
| 789 | Local Variables: |
| 790 | c-basic-offset:2 |
| 791 | comment-column:40 |
| 792 | End: |
| 793 | */ |