| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-2009 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 "trackdb.h" |
| 54 | #include "kvp.h" |
| 55 | |
| 56 | /** @brief Client handle contents */ |
| 57 | struct disorder_client { |
| 58 | /** @brief Stream to read from */ |
| 59 | FILE *fpin; |
| 60 | /** @brief Stream to write to */ |
| 61 | FILE *fpout; |
| 62 | /** @brief Peer description */ |
| 63 | char *ident; |
| 64 | /** @brief Username */ |
| 65 | char *user; |
| 66 | /** @brief Report errors to @c stderr */ |
| 67 | int verbose; |
| 68 | /** @brief Last error string */ |
| 69 | const char *last; |
| 70 | }; |
| 71 | |
| 72 | /** @brief Create a new client |
| 73 | * @param verbose If nonzero, write extra junk to stderr |
| 74 | * @return Pointer to new client |
| 75 | * |
| 76 | * You must call disorder_connect(), disorder_connect_user() or |
| 77 | * disorder_connect_cookie() to connect it. Use disorder_close() to |
| 78 | * dispose of the client when finished with it. |
| 79 | */ |
| 80 | disorder_client *disorder_new(int verbose) { |
| 81 | disorder_client *c = xmalloc(sizeof (struct disorder_client)); |
| 82 | |
| 83 | c->verbose = verbose; |
| 84 | return c; |
| 85 | } |
| 86 | |
| 87 | /** @brief Read a response line |
| 88 | * @param c Client |
| 89 | * @param rp Where to store response, or NULL (UTF-8) |
| 90 | * @return Response code 0-999 or -1 on error |
| 91 | */ |
| 92 | static int response(disorder_client *c, char **rp) { |
| 93 | char *r; |
| 94 | |
| 95 | if(inputline(c->ident, c->fpin, &r, '\n')) { |
| 96 | byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); |
| 97 | return -1; |
| 98 | } |
| 99 | D(("response: %s", r)); |
| 100 | if(rp) |
| 101 | *rp = r; |
| 102 | if(r[0] >= '0' && r[0] <= '9' |
| 103 | && r[1] >= '0' && r[1] <= '9' |
| 104 | && r[2] >= '0' && r[2] <= '9' |
| 105 | && r[3] == ' ') { |
| 106 | c->last = r + 4; |
| 107 | return (r[0] * 10 + r[1]) * 10 + r[2] - 111 * '0'; |
| 108 | } else { |
| 109 | c->last = "invalid reply format"; |
| 110 | disorder_error(0, "invalid reply format from %s", c->ident); |
| 111 | return -1; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /** @brief Return last response string |
| 116 | * @param c Client |
| 117 | * @return Last response string (UTF-8, English) or NULL |
| 118 | */ |
| 119 | const char *disorder_last(disorder_client *c) { |
| 120 | return c->last; |
| 121 | } |
| 122 | |
| 123 | /** @brief Read and partially parse a response |
| 124 | * @param c Client |
| 125 | * @param rp Where to store response text (or NULL) (UTF-8) |
| 126 | * @return 0 on success, non-0 on error |
| 127 | * |
| 128 | * 5xx responses count as errors. |
| 129 | * |
| 130 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 131 | * commentary for a command where it would normally be meaningful). |
| 132 | * |
| 133 | * NB that the response will NOT be converted to the local encoding. |
| 134 | */ |
| 135 | static int check_response(disorder_client *c, char **rp) { |
| 136 | int rc; |
| 137 | char *r; |
| 138 | |
| 139 | if((rc = response(c, &r)) == -1) |
| 140 | return -1; |
| 141 | else if(rc / 100 == 2) { |
| 142 | if(rp) |
| 143 | *rp = (rc % 10 == 9) ? 0 : xstrdup(r + 4); |
| 144 | xfree(r); |
| 145 | return 0; |
| 146 | } else { |
| 147 | if(c->verbose) |
| 148 | disorder_error(0, "from %s: %s", c->ident, utf82mb(r)); |
| 149 | xfree(r); |
| 150 | return rc; |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | /** @brief Issue a command and parse a simple response |
| 155 | * @param c Client |
| 156 | * @param rp Where to store result, or NULL |
| 157 | * @param cmd Command |
| 158 | * @param body Body or NULL |
| 159 | * @param nbody Length of body or -1 |
| 160 | * @param ap Arguments (UTF-8), terminated by (char *)0 |
| 161 | * @return 0 on success, non-0 on error |
| 162 | * |
| 163 | * 5xx responses count as errors. |
| 164 | * |
| 165 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 166 | * commentary for a command where it would normally be meaningful). |
| 167 | * |
| 168 | * NB that the response will NOT be converted to the local encoding |
| 169 | * nor will quotes be stripped. See dequote(). |
| 170 | * |
| 171 | * If @p body is not NULL then the body is sent immediately after the |
| 172 | * command. @p nbody should be the number of lines or @c -1 to count |
| 173 | * them if @p body is NULL-terminated. |
| 174 | * |
| 175 | * Usually you would call this via one of the following interfaces: |
| 176 | * - disorder_simple() |
| 177 | * - disorder_simple_body() |
| 178 | * - disorder_simple_list() |
| 179 | */ |
| 180 | static int disorder_simple_v(disorder_client *c, |
| 181 | char **rp, |
| 182 | const char *cmd, |
| 183 | char **body, int nbody, |
| 184 | va_list ap) { |
| 185 | const char *arg; |
| 186 | struct dynstr d; |
| 187 | |
| 188 | if(!c->fpout) { |
| 189 | c->last = "not connected"; |
| 190 | disorder_error(0, "not connected to server"); |
| 191 | return -1; |
| 192 | } |
| 193 | if(cmd) { |
| 194 | dynstr_init(&d); |
| 195 | dynstr_append_string(&d, cmd); |
| 196 | while((arg = va_arg(ap, const char *))) { |
| 197 | dynstr_append(&d, ' '); |
| 198 | dynstr_append_string(&d, quoteutf8(arg)); |
| 199 | } |
| 200 | dynstr_append(&d, '\n'); |
| 201 | dynstr_terminate(&d); |
| 202 | D(("command: %s", d.vec)); |
| 203 | if(fputs(d.vec, c->fpout) < 0) |
| 204 | goto write_error; |
| 205 | xfree(d.vec); |
| 206 | if(body) { |
| 207 | if(nbody < 0) |
| 208 | for(nbody = 0; body[nbody]; ++nbody) |
| 209 | ; |
| 210 | for(int n = 0; n < nbody; ++n) { |
| 211 | if(body[n][0] == '.') |
| 212 | if(fputc('.', c->fpout) < 0) |
| 213 | goto write_error; |
| 214 | if(fputs(body[n], c->fpout) < 0) |
| 215 | goto write_error; |
| 216 | if(fputc('\n', c->fpout) < 0) |
| 217 | goto write_error; |
| 218 | } |
| 219 | if(fputs(".\n", c->fpout) < 0) |
| 220 | goto write_error; |
| 221 | } |
| 222 | if(fflush(c->fpout)) |
| 223 | goto write_error; |
| 224 | } |
| 225 | return check_response(c, rp); |
| 226 | write_error: |
| 227 | byte_xasprintf((char **)&c->last, "write error: %s", strerror(errno)); |
| 228 | disorder_error(errno, "error writing to %s", c->ident); |
| 229 | return -1; |
| 230 | } |
| 231 | |
| 232 | /** @brief Issue a command and parse a simple response |
| 233 | * @param c Client |
| 234 | * @param rp Where to store result, or NULL (UTF-8) |
| 235 | * @param cmd Command |
| 236 | * @return 0 on success, non-0 on error |
| 237 | * |
| 238 | * The remaining arguments are command arguments, terminated by (char |
| 239 | * *)0. They should be in UTF-8. |
| 240 | * |
| 241 | * 5xx responses count as errors. |
| 242 | * |
| 243 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 244 | * commentary for a command where it would normally be meaningful). |
| 245 | * |
| 246 | * NB that the response will NOT be converted to the local encoding |
| 247 | * nor will quotes be stripped. See dequote(). |
| 248 | */ |
| 249 | static int disorder_simple(disorder_client *c, |
| 250 | char **rp, |
| 251 | const char *cmd, ...) { |
| 252 | va_list ap; |
| 253 | int ret; |
| 254 | |
| 255 | va_start(ap, cmd); |
| 256 | ret = disorder_simple_v(c, rp, cmd, 0, 0, ap); |
| 257 | va_end(ap); |
| 258 | return ret; |
| 259 | } |
| 260 | |
| 261 | /** @brief Issue a command with a body and parse a simple response |
| 262 | * @param c Client |
| 263 | * @param rp Where to store result, or NULL (UTF-8) |
| 264 | * @param body Pointer to body |
| 265 | * @param nbody Size of body |
| 266 | * @param cmd Command |
| 267 | * @return 0 on success, non-0 on error |
| 268 | * |
| 269 | * See disorder_simple(). |
| 270 | */ |
| 271 | static int disorder_simple_body(disorder_client *c, |
| 272 | char **rp, |
| 273 | char **body, int nbody, |
| 274 | const char *cmd, ...) { |
| 275 | va_list ap; |
| 276 | int ret; |
| 277 | |
| 278 | va_start(ap, cmd); |
| 279 | ret = disorder_simple_v(c, rp, cmd, body, nbody, ap); |
| 280 | va_end(ap); |
| 281 | return ret; |
| 282 | } |
| 283 | |
| 284 | /** @brief Dequote a result string |
| 285 | * @param rc 0 on success, non-0 on error |
| 286 | * @param rp Where result string is stored (UTF-8) |
| 287 | * @return @p rc |
| 288 | * |
| 289 | * This is used as a wrapper around disorder_simple() to dequote |
| 290 | * results in place. |
| 291 | */ |
| 292 | static int dequote(int rc, char **rp) { |
| 293 | char **rr; |
| 294 | |
| 295 | if(!rc) { |
| 296 | if((rr = split(*rp, 0, SPLIT_QUOTES, 0, 0)) && *rr) { |
| 297 | xfree(*rp); |
| 298 | *rp = *rr; |
| 299 | xfree(rr); |
| 300 | return 0; |
| 301 | } |
| 302 | disorder_error(0, "invalid reply: %s", *rp); |
| 303 | } |
| 304 | return rc; |
| 305 | } |
| 306 | |
| 307 | /** @brief Generic connection routine |
| 308 | * @param conf Configuration to follow |
| 309 | * @param c Client |
| 310 | * @param username Username to log in with or NULL |
| 311 | * @param password Password to log in with or NULL |
| 312 | * @param cookie Cookie to log in with or NULL |
| 313 | * @return 0 on success, non-0 on error |
| 314 | * |
| 315 | * @p cookie is tried first if not NULL. If it is NULL then @p |
| 316 | * username must not be. If @p username is not NULL then nor may @p |
| 317 | * password be. |
| 318 | */ |
| 319 | int disorder_connect_generic(struct config *conf, |
| 320 | disorder_client *c, |
| 321 | const char *username, |
| 322 | const char *password, |
| 323 | const char *cookie) { |
| 324 | int fd = -1, fd2 = -1, nrvec = 0, rc; |
| 325 | unsigned char *nonce = NULL; |
| 326 | size_t nl; |
| 327 | char *res = NULL; |
| 328 | char *r = NULL, **rvec = NULL; |
| 329 | const char *protocol, *algorithm, *challenge; |
| 330 | struct sockaddr *sa = NULL; |
| 331 | socklen_t salen; |
| 332 | |
| 333 | if((salen = find_server(conf, &sa, &c->ident)) == (socklen_t)-1) |
| 334 | return -1; |
| 335 | c->fpin = c->fpout = 0; |
| 336 | if((fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) { |
| 337 | byte_xasprintf((char **)&c->last, "socket: %s", strerror(errno)); |
| 338 | disorder_error(errno, "error calling socket"); |
| 339 | return -1; |
| 340 | } |
| 341 | if(connect(fd, sa, salen) < 0) { |
| 342 | byte_xasprintf((char **)&c->last, "connect: %s", strerror(errno)); |
| 343 | disorder_error(errno, "error calling connect"); |
| 344 | goto error; |
| 345 | } |
| 346 | if((fd2 = dup(fd)) < 0) { |
| 347 | byte_xasprintf((char **)&c->last, "dup: %s", strerror(errno)); |
| 348 | disorder_error(errno, "error calling dup"); |
| 349 | goto error; |
| 350 | } |
| 351 | if(!(c->fpin = fdopen(fd, "rb"))) { |
| 352 | byte_xasprintf((char **)&c->last, "fdopen: %s", strerror(errno)); |
| 353 | disorder_error(errno, "error calling fdopen"); |
| 354 | goto error; |
| 355 | } |
| 356 | fd = -1; |
| 357 | if(!(c->fpout = fdopen(fd2, "wb"))) { |
| 358 | byte_xasprintf((char **)&c->last, "fdopen: %s", strerror(errno)); |
| 359 | disorder_error(errno, "error calling fdopen"); |
| 360 | goto error; |
| 361 | } |
| 362 | fd2 = -1; |
| 363 | if((rc = disorder_simple(c, &r, 0, (const char *)0))) |
| 364 | goto error_rc; |
| 365 | if(!(rvec = split(r, &nrvec, SPLIT_QUOTES, 0, 0))) |
| 366 | goto error; |
| 367 | if(nrvec != 3) { |
| 368 | c->last = "cannot parse server greeting"; |
| 369 | disorder_error(0, "cannot parse server greeting %s", r); |
| 370 | goto error; |
| 371 | } |
| 372 | protocol = rvec[0]; |
| 373 | if(strcmp(protocol, "2")) { |
| 374 | c->last = "unknown protocol version"; |
| 375 | disorder_error(0, "unknown protocol version: %s", protocol); |
| 376 | goto error; |
| 377 | } |
| 378 | algorithm = rvec[1]; |
| 379 | challenge = rvec[2]; |
| 380 | if(!(nonce = unhex(challenge, &nl))) |
| 381 | goto error; |
| 382 | if(cookie) { |
| 383 | if(!dequote(disorder_simple(c, &c->user, "cookie", cookie, (char *)0), |
| 384 | &c->user)) |
| 385 | return 0; /* success */ |
| 386 | if(!username) { |
| 387 | c->last = "cookie failed and no username"; |
| 388 | disorder_error(0, "cookie did not work and no username available"); |
| 389 | goto error; |
| 390 | } |
| 391 | } |
| 392 | if(!(res = authhash(nonce, nl, password, algorithm))) { |
| 393 | c->last = "error computing authorization hash"; |
| 394 | goto error; |
| 395 | } |
| 396 | if((rc = disorder_simple(c, 0, "user", username, res, (char *)0))) |
| 397 | goto error_rc; |
| 398 | c->user = xstrdup(username); |
| 399 | xfree(res); |
| 400 | free_strings(nrvec, rvec); |
| 401 | xfree(nonce); |
| 402 | xfree(sa); |
| 403 | xfree(r); |
| 404 | return 0; |
| 405 | error: |
| 406 | rc = -1; |
| 407 | error_rc: |
| 408 | if(c->fpin) { |
| 409 | fclose(c->fpin); |
| 410 | c->fpin = 0; |
| 411 | } |
| 412 | if(c->fpout) { |
| 413 | fclose(c->fpout); |
| 414 | c->fpout = 0; |
| 415 | } |
| 416 | if(fd2 != -1) close(fd2); |
| 417 | if(fd != -1) close(fd); |
| 418 | return rc; |
| 419 | } |
| 420 | |
| 421 | /** @brief Connect a client with a specified username and password |
| 422 | * @param c Client |
| 423 | * @param username Username to log in with |
| 424 | * @param password Password to log in with |
| 425 | * @return 0 on success, non-0 on error |
| 426 | */ |
| 427 | int disorder_connect_user(disorder_client *c, |
| 428 | const char *username, |
| 429 | const char *password) { |
| 430 | return disorder_connect_generic(config, |
| 431 | c, |
| 432 | username, |
| 433 | password, |
| 434 | 0); |
| 435 | } |
| 436 | |
| 437 | /** @brief Connect a client |
| 438 | * @param c Client |
| 439 | * @return 0 on success, non-0 on error |
| 440 | * |
| 441 | * The connection will use the username and password found in @ref |
| 442 | * config, or directly from the database if no password is found and |
| 443 | * the database is readable (usually only for root). |
| 444 | */ |
| 445 | int disorder_connect(disorder_client *c) { |
| 446 | const char *username, *password; |
| 447 | |
| 448 | if(!(username = config->username)) { |
| 449 | c->last = "no username"; |
| 450 | disorder_error(0, "no username configured"); |
| 451 | return -1; |
| 452 | } |
| 453 | password = config->password; |
| 454 | /* Maybe we can read the database */ |
| 455 | if(!password && trackdb_readable()) { |
| 456 | trackdb_init(TRACKDB_NO_RECOVER|TRACKDB_NO_UPGRADE); |
| 457 | trackdb_open(TRACKDB_READ_ONLY); |
| 458 | password = trackdb_get_password(username); |
| 459 | trackdb_close(); |
| 460 | } |
| 461 | if(!password) { |
| 462 | /* Oh well */ |
| 463 | c->last = "no password"; |
| 464 | disorder_error(0, "no password configured for user '%s'", username); |
| 465 | return -1; |
| 466 | } |
| 467 | return disorder_connect_generic(config, |
| 468 | c, |
| 469 | username, |
| 470 | password, |
| 471 | 0); |
| 472 | } |
| 473 | |
| 474 | /** @brief Connect a client |
| 475 | * @param c Client |
| 476 | * @param cookie Cookie to log in with, or NULL |
| 477 | * @return 0 on success, non-0 on error |
| 478 | * |
| 479 | * If @p cookie is NULL or does not work then we attempt to log in as |
| 480 | * guest instead (so when the cookie expires only an extra round trip |
| 481 | * is needed rathre than a complete new login). |
| 482 | */ |
| 483 | int disorder_connect_cookie(disorder_client *c, |
| 484 | const char *cookie) { |
| 485 | return disorder_connect_generic(config, |
| 486 | c, |
| 487 | "guest", |
| 488 | "", |
| 489 | cookie); |
| 490 | } |
| 491 | |
| 492 | /** @brief Close a client |
| 493 | * @param c Client |
| 494 | * @return 0 on succcess, non-0 on errior |
| 495 | * |
| 496 | * The client is still closed even on error. It might well be |
| 497 | * appropriate to ignore the return value. |
| 498 | */ |
| 499 | int disorder_close(disorder_client *c) { |
| 500 | int ret = 0; |
| 501 | |
| 502 | if(c->fpin) { |
| 503 | if(fclose(c->fpin) < 0) { |
| 504 | byte_xasprintf((char **)&c->last, "fclose: %s", strerror(errno)); |
| 505 | disorder_error(errno, "error calling fclose"); |
| 506 | ret = -1; |
| 507 | } |
| 508 | c->fpin = 0; |
| 509 | } |
| 510 | if(c->fpout) { |
| 511 | if(fclose(c->fpout) < 0) { |
| 512 | byte_xasprintf((char **)&c->last, "fclose: %s", strerror(errno)); |
| 513 | disorder_error(errno, "error calling fclose"); |
| 514 | ret = -1; |
| 515 | } |
| 516 | c->fpout = 0; |
| 517 | } |
| 518 | xfree(c->ident); |
| 519 | c->ident = 0; |
| 520 | xfree(c->user); |
| 521 | c->user = 0; |
| 522 | return ret; |
| 523 | } |
| 524 | |
| 525 | /** @brief Move a track |
| 526 | * @param c Client |
| 527 | * @param track Track to move (UTF-8) |
| 528 | * @param delta Distance to move by |
| 529 | * @return 0 on success, non-0 on error |
| 530 | */ |
| 531 | int disorder_move(disorder_client *c, const char *track, int delta) { |
| 532 | char d[16]; |
| 533 | |
| 534 | byte_snprintf(d, sizeof d, "%d", delta); |
| 535 | return disorder_simple(c, 0, "move", track, d, (char *)0); |
| 536 | } |
| 537 | |
| 538 | static void client_error(const char *msg, |
| 539 | void attribute((unused)) *u) { |
| 540 | disorder_error(0, "error parsing reply: %s", msg); |
| 541 | } |
| 542 | |
| 543 | /** @brief Get currently playing track |
| 544 | * @param c Client |
| 545 | * @param qp Where to store track information |
| 546 | * @return 0 on success, non-0 on error |
| 547 | * |
| 548 | * @p qp gets NULL if no track is playing. |
| 549 | */ |
| 550 | int disorder_playing(disorder_client *c, struct queue_entry **qp) { |
| 551 | char *r; |
| 552 | struct queue_entry *q; |
| 553 | int rc; |
| 554 | |
| 555 | if((rc = disorder_simple(c, &r, "playing", (char *)0))) |
| 556 | return rc; |
| 557 | if(r) { |
| 558 | q = xmalloc(sizeof *q); |
| 559 | if(queue_unmarshall(q, r, client_error, 0)) |
| 560 | return -1; |
| 561 | *qp = q; |
| 562 | } else |
| 563 | *qp = 0; |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | /** @brief Fetch the queue, recent list, etc */ |
| 568 | static int disorder_somequeue(disorder_client *c, |
| 569 | const char *cmd, struct queue_entry **qp) { |
| 570 | struct queue_entry *qh, **qt = &qh, *q; |
| 571 | char *l; |
| 572 | int rc; |
| 573 | |
| 574 | if((rc = disorder_simple(c, 0, cmd, (char *)0))) |
| 575 | return rc; |
| 576 | while(inputline(c->ident, c->fpin, &l, '\n') >= 0) { |
| 577 | if(!strcmp(l, ".")) { |
| 578 | *qt = 0; |
| 579 | *qp = qh; |
| 580 | xfree(l); |
| 581 | return 0; |
| 582 | } |
| 583 | q = xmalloc(sizeof *q); |
| 584 | if(!queue_unmarshall(q, l, client_error, 0)) { |
| 585 | *qt = q; |
| 586 | qt = &q->next; |
| 587 | } |
| 588 | xfree(l); |
| 589 | } |
| 590 | if(ferror(c->fpin)) { |
| 591 | byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); |
| 592 | disorder_error(errno, "error reading %s", c->ident); |
| 593 | } else { |
| 594 | c->last = "input error: unexpxected EOF"; |
| 595 | disorder_error(0, "error reading %s: unexpected EOF", c->ident); |
| 596 | } |
| 597 | return -1; |
| 598 | } |
| 599 | |
| 600 | /** @brief Get recently played tracks |
| 601 | * @param c Client |
| 602 | * @param qp Where to store track information |
| 603 | * @return 0 on success, non-0 on error |
| 604 | * |
| 605 | * The last entry in the list is the most recently played track. |
| 606 | */ |
| 607 | int disorder_recent(disorder_client *c, struct queue_entry **qp) { |
| 608 | return disorder_somequeue(c, "recent", qp); |
| 609 | } |
| 610 | |
| 611 | /** @brief Get queue |
| 612 | * @param c Client |
| 613 | * @param qp Where to store track information |
| 614 | * @return 0 on success, non-0 on error |
| 615 | * |
| 616 | * The first entry in the list will be played next. |
| 617 | */ |
| 618 | int disorder_queue(disorder_client *c, struct queue_entry **qp) { |
| 619 | return disorder_somequeue(c, "queue", qp); |
| 620 | } |
| 621 | |
| 622 | /** @brief Read a dot-stuffed list |
| 623 | * @param c Client |
| 624 | * @param vecp Where to store list (UTF-8) |
| 625 | * @param nvecp Where to store number of items, or NULL |
| 626 | * @return 0 on success, non-0 on error |
| 627 | * |
| 628 | * The list will have a final NULL not counted in @p nvecp. |
| 629 | */ |
| 630 | static int readlist(disorder_client *c, char ***vecp, int *nvecp) { |
| 631 | char *l; |
| 632 | struct vector v; |
| 633 | |
| 634 | vector_init(&v); |
| 635 | while(inputline(c->ident, c->fpin, &l, '\n') >= 0) { |
| 636 | if(!strcmp(l, ".")) { |
| 637 | vector_terminate(&v); |
| 638 | if(nvecp) |
| 639 | *nvecp = v.nvec; |
| 640 | *vecp = v.vec; |
| 641 | xfree(l); |
| 642 | return 0; |
| 643 | } |
| 644 | vector_append(&v, xstrdup(l + (*l == '.'))); |
| 645 | xfree(l); |
| 646 | } |
| 647 | if(ferror(c->fpin)) { |
| 648 | byte_xasprintf((char **)&c->last, "input error: %s", strerror(errno)); |
| 649 | disorder_error(errno, "error reading %s", c->ident); |
| 650 | } else { |
| 651 | c->last = "input error: unexpxected EOF"; |
| 652 | disorder_error(0, "error reading %s: unexpected EOF", c->ident); |
| 653 | } |
| 654 | return -1; |
| 655 | } |
| 656 | |
| 657 | /** @brief Issue a comamnd and get a list response |
| 658 | * @param c Client |
| 659 | * @param vecp Where to store list (UTF-8) |
| 660 | * @param nvecp Where to store number of items, or NULL |
| 661 | * @param cmd Command |
| 662 | * @return 0 on success, non-0 on error |
| 663 | * |
| 664 | * The remaining arguments are command arguments, terminated by (char |
| 665 | * *)0. They should be in UTF-8. |
| 666 | * |
| 667 | * 5xx responses count as errors. |
| 668 | * |
| 669 | * See disorder_simple(). |
| 670 | */ |
| 671 | static int disorder_simple_list(disorder_client *c, |
| 672 | char ***vecp, int *nvecp, |
| 673 | const char *cmd, ...) { |
| 674 | va_list ap; |
| 675 | int ret; |
| 676 | |
| 677 | va_start(ap, cmd); |
| 678 | ret = disorder_simple_v(c, 0, cmd, 0, 0, ap); |
| 679 | va_end(ap); |
| 680 | if(ret) return ret; |
| 681 | return readlist(c, vecp, nvecp); |
| 682 | } |
| 683 | |
| 684 | /** @brief Return the user we logged in with |
| 685 | * @param c Client |
| 686 | * @return User name (owned by @p c, don't modify) |
| 687 | */ |
| 688 | char *disorder_user(disorder_client *c) { |
| 689 | return c->user; |
| 690 | } |
| 691 | |
| 692 | static void pref_error_handler(const char *msg, |
| 693 | void attribute((unused)) *u) { |
| 694 | disorder_error(0, "error handling 'prefs' reply: %s", msg); |
| 695 | } |
| 696 | |
| 697 | /** @brief Get all preferences for a trcak |
| 698 | * @param c Client |
| 699 | * @param track Track name |
| 700 | * @param kp Where to store linked list of preferences |
| 701 | * @return 0 on success, non-0 on error |
| 702 | */ |
| 703 | int disorder_prefs(disorder_client *c, const char *track, struct kvp **kp) { |
| 704 | char **vec, **pvec; |
| 705 | int nvec, npvec, n, rc; |
| 706 | struct kvp *k; |
| 707 | |
| 708 | if((rc = disorder_simple_list(c, &vec, &nvec, "prefs", track, (char *)0))) |
| 709 | return rc; |
| 710 | for(n = 0; n < nvec; ++n) { |
| 711 | if(!(pvec = split(vec[n], &npvec, SPLIT_QUOTES, pref_error_handler, 0))) |
| 712 | return -1; |
| 713 | if(npvec != 2) { |
| 714 | pref_error_handler("malformed response", 0); |
| 715 | return -1; |
| 716 | } |
| 717 | *kp = k = xmalloc(sizeof *k); |
| 718 | k->name = pvec[0]; |
| 719 | k->value = pvec[1]; |
| 720 | kp = &k->next; |
| 721 | xfree(pvec); |
| 722 | } |
| 723 | free_strings(nvec, vec); |
| 724 | *kp = 0; |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | /** @brief Parse a boolean response |
| 729 | * @param cmd Command for use in error messsage |
| 730 | * @param value Result from server |
| 731 | * @param flagp Where to store result |
| 732 | * @return 0 on success, non-0 on error |
| 733 | */ |
| 734 | static int boolean(const char *cmd, const char *value, |
| 735 | int *flagp) { |
| 736 | if(!strcmp(value, "yes")) *flagp = 1; |
| 737 | else if(!strcmp(value, "no")) *flagp = 0; |
| 738 | else { |
| 739 | disorder_error(0, "malformed response to '%s'", cmd); |
| 740 | return -1; |
| 741 | } |
| 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | /** @brief Set volume |
| 746 | * @param c Client |
| 747 | * @param left New left channel value |
| 748 | * @param right New right channel value |
| 749 | * @return 0 on success, non-0 on error |
| 750 | */ |
| 751 | int disorder_set_volume(disorder_client *c, int left, int right) { |
| 752 | char *ls, *rs; |
| 753 | |
| 754 | if(byte_asprintf(&ls, "%d", left) < 0 |
| 755 | || byte_asprintf(&rs, "%d", right) < 0) |
| 756 | return -1; |
| 757 | return disorder_simple(c, 0, "volume", ls, rs, (char *)0); |
| 758 | } |
| 759 | |
| 760 | /** @brief Get volume |
| 761 | * @param c Client |
| 762 | * @param left Where to store left channel value |
| 763 | * @param right Where to store right channel value |
| 764 | * @return 0 on success, non-0 on error |
| 765 | */ |
| 766 | int disorder_get_volume(disorder_client *c, int *left, int *right) { |
| 767 | char *r; |
| 768 | int rc; |
| 769 | |
| 770 | if((rc = disorder_simple(c, &r, "volume", (char *)0))) |
| 771 | return rc; |
| 772 | if(sscanf(r, "%d %d", left, right) != 2) { |
| 773 | c->last = "malformed volume response"; |
| 774 | disorder_error(0, "error parsing response to 'volume': '%s'", r); |
| 775 | return -1; |
| 776 | } |
| 777 | return 0; |
| 778 | } |
| 779 | |
| 780 | /** @brief Log to a sink |
| 781 | * @param c Client |
| 782 | * @param s Sink to write log lines to |
| 783 | * @return 0 on success, non-0 on error |
| 784 | */ |
| 785 | int disorder_log(disorder_client *c, struct sink *s) { |
| 786 | char *l; |
| 787 | int rc; |
| 788 | |
| 789 | if((rc = disorder_simple(c, 0, "log", (char *)0))) |
| 790 | return rc; |
| 791 | while(inputline(c->ident, c->fpin, &l, '\n') >= 0 && strcmp(l, ".")) |
| 792 | if(sink_printf(s, "%s\n", l) < 0) return -1; |
| 793 | if(ferror(c->fpin) || feof(c->fpin)) { |
| 794 | byte_xasprintf((char **)&c->last, "input error: %s", |
| 795 | ferror(c->fpin) ? strerror(errno) : "unexpxected EOF"); |
| 796 | return -1; |
| 797 | } |
| 798 | return 0; |
| 799 | } |
| 800 | |
| 801 | /** @brief Get recently added tracks |
| 802 | * @param c Client |
| 803 | * @param vecp Where to store pointer to list (UTF-8) |
| 804 | * @param nvecp Where to store count |
| 805 | * @param max Maximum tracks to fetch, or 0 for all available |
| 806 | * @return 0 on success, non-0 on error |
| 807 | */ |
| 808 | int disorder_new_tracks(disorder_client *c, |
| 809 | char ***vecp, int *nvecp, |
| 810 | int max) { |
| 811 | char limit[32]; |
| 812 | |
| 813 | sprintf(limit, "%d", max); |
| 814 | return disorder_simple_list(c, vecp, nvecp, "new", limit, (char *)0); |
| 815 | } |
| 816 | |
| 817 | /** @brief Get server's RTP address information |
| 818 | * @param c Client |
| 819 | * @param addressp Where to store address (UTF-8) |
| 820 | * @param portp Where to store port (UTF-8) |
| 821 | * @return 0 on success, non-0 on error |
| 822 | */ |
| 823 | int disorder_rtp_address(disorder_client *c, char **addressp, char **portp) { |
| 824 | char *r; |
| 825 | int rc, n; |
| 826 | char **vec; |
| 827 | |
| 828 | if((rc = disorder_simple(c, &r, "rtp-address", (char *)0))) |
| 829 | return rc; |
| 830 | vec = split(r, &n, SPLIT_QUOTES, 0, 0); |
| 831 | if(n != 2) { |
| 832 | c->last = "malformed RTP address"; |
| 833 | disorder_error(0, "malformed rtp-address reply"); |
| 834 | return -1; |
| 835 | } |
| 836 | *addressp = vec[0]; |
| 837 | *portp = vec[1]; |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | /** @brief Get details of a scheduled event |
| 842 | * @param c Client |
| 843 | * @param id Event ID |
| 844 | * @param actiondatap Where to put details |
| 845 | * @return 0 on success, non-0 on error |
| 846 | */ |
| 847 | int disorder_schedule_get(disorder_client *c, const char *id, |
| 848 | struct kvp **actiondatap) { |
| 849 | char **lines, **bits; |
| 850 | int rc, nbits; |
| 851 | |
| 852 | *actiondatap = 0; |
| 853 | if((rc = disorder_simple_list(c, &lines, NULL, |
| 854 | "schedule-get", id, (char *)0))) |
| 855 | return rc; |
| 856 | while(*lines) { |
| 857 | if(!(bits = split(*lines++, &nbits, SPLIT_QUOTES, 0, 0))) { |
| 858 | disorder_error(0, "invalid schedule-get reply: cannot split line"); |
| 859 | return -1; |
| 860 | } |
| 861 | if(nbits != 2) { |
| 862 | disorder_error(0, "invalid schedule-get reply: wrong number of fields"); |
| 863 | return -1; |
| 864 | } |
| 865 | kvp_set(actiondatap, bits[0], bits[1]); |
| 866 | } |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | /** @brief Add a scheduled event |
| 871 | * @param c Client |
| 872 | * @param when When to trigger the event |
| 873 | * @param priority Event priority ("normal" or "junk") |
| 874 | * @param action What action to perform |
| 875 | * @param ... Action-specific arguments |
| 876 | * @return 0 on success, non-0 on error |
| 877 | * |
| 878 | * For action @c "play" the next argument is the track. |
| 879 | * |
| 880 | * For action @c "set-global" next argument is the global preference name |
| 881 | * and the final argument the value to set it to, or (char *)0 to unset it. |
| 882 | */ |
| 883 | int disorder_schedule_add(disorder_client *c, |
| 884 | time_t when, |
| 885 | const char *priority, |
| 886 | const char *action, |
| 887 | ...) { |
| 888 | va_list ap; |
| 889 | char when_str[64]; |
| 890 | int rc; |
| 891 | |
| 892 | snprintf(when_str, sizeof when_str, "%lld", (long long)when); |
| 893 | va_start(ap, action); |
| 894 | if(!strcmp(action, "play")) |
| 895 | rc = disorder_simple(c, 0, "schedule-add", when_str, priority, |
| 896 | action, va_arg(ap, char *), |
| 897 | (char *)0); |
| 898 | else if(!strcmp(action, "set-global")) { |
| 899 | const char *key = va_arg(ap, char *); |
| 900 | const char *value = va_arg(ap, char *); |
| 901 | rc = disorder_simple(c, 0,"schedule-add", when_str, priority, |
| 902 | action, key, value, |
| 903 | (char *)0); |
| 904 | } else |
| 905 | disorder_fatal(0, "unknown action '%s'", action); |
| 906 | va_end(ap); |
| 907 | return rc; |
| 908 | } |
| 909 | |
| 910 | /** @brief Set the contents of a playlst |
| 911 | * @param c Client |
| 912 | * @param playlist Playlist to modify |
| 913 | * @param tracks List of tracks |
| 914 | * @param ntracks Length of @p tracks (or -1 to count up to the first NULL) |
| 915 | * @return 0 on success, non-0 on error |
| 916 | */ |
| 917 | int disorder_playlist_set(disorder_client *c, |
| 918 | const char *playlist, |
| 919 | char **tracks, |
| 920 | int ntracks) { |
| 921 | return disorder_simple_body(c, 0, tracks, ntracks, |
| 922 | "playlist-set", playlist, (char *)0); |
| 923 | } |
| 924 | |
| 925 | #include "client-stubs.c" |
| 926 | |
| 927 | /* |
| 928 | Local Variables: |
| 929 | c-basic-offset:2 |
| 930 | comment-column:40 |
| 931 | End: |
| 932 | */ |