| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004-13 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 | #if HAVE_SYS_SOCKET_H |
| 29 | # include <sys/socket.h> |
| 30 | #endif |
| 31 | #if HAVE_NETINET_IN_H |
| 32 | # include <netinet/in.h> |
| 33 | #endif |
| 34 | #if HAVE_SYS_UN_H |
| 35 | # include <sys/un.h> |
| 36 | #endif |
| 37 | #if HAVE_UNISTD_H |
| 38 | # include <unistd.h> |
| 39 | #endif |
| 40 | #include <errno.h> |
| 41 | #if HAVE_NETDB_H |
| 42 | # include <netdb.h> |
| 43 | #endif |
| 44 | |
| 45 | #include "log.h" |
| 46 | #include "mem.h" |
| 47 | #include "queue.h" |
| 48 | #include "client.h" |
| 49 | #include "charset.h" |
| 50 | #include "hex.h" |
| 51 | #include "split.h" |
| 52 | #include "vector.h" |
| 53 | #include "inputline.h" |
| 54 | #include "kvp.h" |
| 55 | #include "syscalls.h" |
| 56 | #include "printf.h" |
| 57 | #include "sink.h" |
| 58 | #include "addr.h" |
| 59 | #include "authhash.h" |
| 60 | #include "client-common.h" |
| 61 | #include "rights.h" |
| 62 | #include "kvp.h" |
| 63 | #include "socketio.h" |
| 64 | |
| 65 | /** @brief Client handle contents */ |
| 66 | struct disorder_client { |
| 67 | /** @brief Stream to read from */ |
| 68 | struct source *input; |
| 69 | /** @brief Stream to write to */ |
| 70 | struct sink *output; |
| 71 | /** @brief Peer description */ |
| 72 | char *ident; |
| 73 | /** @brief Username */ |
| 74 | char *user; |
| 75 | /** @brief Report errors to @c stderr */ |
| 76 | int verbose; |
| 77 | /** @brief Last error string */ |
| 78 | const char *last; |
| 79 | /** @brief Address family */ |
| 80 | int family; |
| 81 | /** @brief True if open */ |
| 82 | int open; |
| 83 | /** @brief Socket I/O context */ |
| 84 | struct socketio sio; |
| 85 | /** @brief Whether to try to open a privileged connection */ |
| 86 | int trypriv; |
| 87 | }; |
| 88 | |
| 89 | /** @brief Create a new client |
| 90 | * @param verbose If nonzero, write extra junk to stderr |
| 91 | * @return Pointer to new client |
| 92 | * |
| 93 | * You must call disorder_connect(), disorder_connect_user() or |
| 94 | * disorder_connect_cookie() to connect it. Use disorder_close() to |
| 95 | * dispose of the client when finished with it. |
| 96 | */ |
| 97 | disorder_client *disorder_new(int verbose) { |
| 98 | disorder_client *c = xmalloc(sizeof (struct disorder_client)); |
| 99 | |
| 100 | c->verbose = verbose; |
| 101 | c->family = -1; |
| 102 | c->trypriv = 1; |
| 103 | return c; |
| 104 | } |
| 105 | |
| 106 | /** @brief Don't try to make a privileged connection |
| 107 | * @param c Client |
| 108 | * |
| 109 | * You must call this before any of the connection functions (e.g., |
| 110 | * disorder_connect(), disorder_connect_user()), if at all. |
| 111 | */ |
| 112 | void disorder_force_unpriv(disorder_client *c) { |
| 113 | assert(!c->open); |
| 114 | c->trypriv = 0; |
| 115 | } |
| 116 | |
| 117 | /** @brief Return the address family used by this client */ |
| 118 | int disorder_client_af(disorder_client *c) { |
| 119 | return c->family; |
| 120 | } |
| 121 | |
| 122 | /** @brief Read a response line |
| 123 | * @param c Client |
| 124 | * @param rp Where to store response, or NULL (UTF-8) |
| 125 | * @return Response code 0-999 or -1 on error |
| 126 | */ |
| 127 | static int response(disorder_client *c, char **rp) { |
| 128 | char *r; |
| 129 | char errbuf[1024]; |
| 130 | |
| 131 | if(inputlines(c->ident, c->input, &r, '\n')) { |
| 132 | byte_xasprintf((char **)&c->last, "input error: %s", |
| 133 | format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); |
| 134 | return -1; |
| 135 | } |
| 136 | D(("response: %s", r)); |
| 137 | if(rp) |
| 138 | *rp = r; |
| 139 | if(r[0] >= '0' && r[0] <= '9' |
| 140 | && r[1] >= '0' && r[1] <= '9' |
| 141 | && r[2] >= '0' && r[2] <= '9' |
| 142 | && r[3] == ' ') { |
| 143 | c->last = r + 4; |
| 144 | return (r[0] * 10 + r[1]) * 10 + r[2] - 111 * '0'; |
| 145 | } else { |
| 146 | c->last = "invalid reply format"; |
| 147 | disorder_error(0, "invalid reply format from %s", c->ident); |
| 148 | return -1; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /** @brief Return last response string |
| 153 | * @param c Client |
| 154 | * @return Last response string (UTF-8, English) or NULL |
| 155 | */ |
| 156 | const char *disorder_last(disorder_client *c) { |
| 157 | return c->last; |
| 158 | } |
| 159 | |
| 160 | /** @brief Read and partially parse a response |
| 161 | * @param c Client |
| 162 | * @param rp Where to store response text (or NULL) (UTF-8) |
| 163 | * @return 0 on success, non-0 on error |
| 164 | * |
| 165 | * 5xx responses count as errors. |
| 166 | * |
| 167 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 168 | * commentary for a command where it would normally be meaningful). |
| 169 | * |
| 170 | * NB that the response will NOT be converted to the local encoding. |
| 171 | */ |
| 172 | static int check_response(disorder_client *c, char **rp) { |
| 173 | int rc; |
| 174 | char *r; |
| 175 | |
| 176 | if((rc = response(c, &r)) == -1) |
| 177 | return -1; |
| 178 | else if(rc / 100 == 2) { |
| 179 | if(rp) |
| 180 | *rp = (rc % 10 == 9) ? 0 : xstrdup(r + 4); |
| 181 | xfree(r); |
| 182 | return 0; |
| 183 | } else { |
| 184 | if(c->verbose) |
| 185 | disorder_error(0, "from %s: %s", c->ident, utf82mb(r)); |
| 186 | xfree(r); |
| 187 | return rc; |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | /** @brief Issue a command and parse a simple response |
| 192 | * @param c Client |
| 193 | * @param rp Where to store result, or NULL |
| 194 | * @param cmd Command |
| 195 | * @param ap Arguments (UTF-8), terminated by (char *)0 |
| 196 | * @return 0 on success, non-0 on error |
| 197 | * |
| 198 | * 5xx responses count as errors. |
| 199 | * |
| 200 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 201 | * commentary for a command where it would normally be meaningful). |
| 202 | * |
| 203 | * NB that the response will NOT be converted to the local encoding |
| 204 | * nor will quotes be stripped. See dequote(). |
| 205 | * |
| 206 | * Put @ref disorder__body in the argument list followed by a char ** |
| 207 | * and int giving the body to follow the command. If the int is @c -1 |
| 208 | * then the list is assumed to be NULL-terminated. This may be used |
| 209 | * only once. |
| 210 | * |
| 211 | * Put @ref disorder__list in the argument list followed by a char ** |
| 212 | * and int giving a list of arguments to include. If the int is @c -1 |
| 213 | * then the list is assumed to be NULL-terminated. This may be used |
| 214 | * any number of times. |
| 215 | * |
| 216 | * Put @ref disorder__integer in the argument list followed by a long to |
| 217 | * send its value in decimal. This may be used any number of times. |
| 218 | * |
| 219 | * Put @ref disorder__time in the argument list followed by a time_t |
| 220 | * to send its value in decimal. This may be used any number of |
| 221 | * times. |
| 222 | * |
| 223 | * Usually you would call this via one of the following interfaces: |
| 224 | * - disorder_simple() |
| 225 | */ |
| 226 | static int disorder_simple_v(disorder_client *c, |
| 227 | char **rp, |
| 228 | const char *cmd, |
| 229 | va_list ap) { |
| 230 | const char *arg; |
| 231 | struct dynstr d; |
| 232 | char **body = NULL; |
| 233 | int nbody = 0; |
| 234 | int has_body = 0; |
| 235 | char errbuf[1024]; |
| 236 | |
| 237 | if(!c->open) { |
| 238 | c->last = "not connected"; |
| 239 | disorder_error(0, "not connected to server"); |
| 240 | return -1; |
| 241 | } |
| 242 | if(cmd) { |
| 243 | dynstr_init(&d); |
| 244 | dynstr_append_string(&d, cmd); |
| 245 | while((arg = va_arg(ap, const char *))) { |
| 246 | if(arg == disorder__body) { |
| 247 | body = va_arg(ap, char **); |
| 248 | nbody = va_arg(ap, int); |
| 249 | has_body = 1; |
| 250 | } else if(arg == disorder__list) { |
| 251 | char **list = va_arg(ap, char **); |
| 252 | int nlist = va_arg(ap, int); |
| 253 | int n; |
| 254 | if(nlist < 0) { |
| 255 | for(nlist = 0; list[nlist]; ++nlist) |
| 256 | ; |
| 257 | } |
| 258 | for(n = 0; n < nlist; ++n) { |
| 259 | dynstr_append(&d, ' '); |
| 260 | dynstr_append_string(&d, quoteutf8(arg)); |
| 261 | } |
| 262 | } else if(arg == disorder__integer) { |
| 263 | long n = va_arg(ap, long); |
| 264 | char buffer[16]; |
| 265 | byte_snprintf(buffer, sizeof buffer, "%ld", n); |
| 266 | dynstr_append(&d, ' '); |
| 267 | dynstr_append_string(&d, buffer); |
| 268 | } else if(arg == disorder__time) { |
| 269 | time_t n = va_arg(ap, time_t); |
| 270 | char buffer[16]; |
| 271 | byte_snprintf(buffer, sizeof buffer, "%lld", (long long)n); |
| 272 | dynstr_append(&d, ' '); |
| 273 | dynstr_append_string(&d, buffer); |
| 274 | } else { |
| 275 | dynstr_append(&d, ' '); |
| 276 | dynstr_append_string(&d, quoteutf8(arg)); |
| 277 | } |
| 278 | } |
| 279 | dynstr_append(&d, '\n'); |
| 280 | dynstr_terminate(&d); |
| 281 | D(("command: %s", d.vec)); |
| 282 | if(sink_write(c->output, d.vec, d.nvec) < 0) |
| 283 | goto write_error; |
| 284 | xfree(d.vec); |
| 285 | if(has_body) { |
| 286 | int n; |
| 287 | if(nbody < 0) |
| 288 | for(nbody = 0; body[nbody]; ++nbody) |
| 289 | ; |
| 290 | for(n = 0; n < nbody; ++n) { |
| 291 | if(body[n][0] == '.') |
| 292 | if(sink_writec(c->output, '.') < 0) |
| 293 | goto write_error; |
| 294 | if(sink_writes(c->output, body[n]) < 0) |
| 295 | goto write_error; |
| 296 | if(sink_writec(c->output, '\n') < 0) |
| 297 | goto write_error; |
| 298 | } |
| 299 | if(sink_writes(c->output, ".\n") < 0) |
| 300 | goto write_error; |
| 301 | } |
| 302 | if(sink_flush(c->output)) |
| 303 | goto write_error; |
| 304 | } |
| 305 | return check_response(c, rp); |
| 306 | write_error: |
| 307 | byte_xasprintf((char **)&c->last, "write error: %s", |
| 308 | format_error(c->output->eclass, sink_err(c->output), errbuf, sizeof errbuf)); |
| 309 | disorder_error(0, "%s: %s", c->ident, c->last); |
| 310 | return -1; |
| 311 | } |
| 312 | |
| 313 | /** @brief Issue a command and parse a simple response |
| 314 | * @param c Client |
| 315 | * @param rp Where to store result, or NULL (UTF-8) |
| 316 | * @param cmd Command |
| 317 | * @return 0 on success, non-0 on error |
| 318 | * |
| 319 | * The remaining arguments are command arguments, terminated by (char |
| 320 | * *)0. They should be in UTF-8. |
| 321 | * |
| 322 | * 5xx responses count as errors. |
| 323 | * |
| 324 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 325 | * commentary for a command where it would normally be meaningful). |
| 326 | * |
| 327 | * NB that the response will NOT be converted to the local encoding |
| 328 | * nor will quotes be stripped. See dequote(). |
| 329 | */ |
| 330 | static int disorder_simple(disorder_client *c, |
| 331 | char **rp, |
| 332 | const char *cmd, ...) { |
| 333 | va_list ap; |
| 334 | int ret; |
| 335 | |
| 336 | va_start(ap, cmd); |
| 337 | ret = disorder_simple_v(c, rp, cmd, ap); |
| 338 | va_end(ap); |
| 339 | return ret; |
| 340 | } |
| 341 | |
| 342 | /** @brief Issue a command and split the response |
| 343 | * @param c Client |
| 344 | * @param vecp Where to store results |
| 345 | * @param nvecp Where to store count of results |
| 346 | * @param expected Expected count (or -1 to not check) |
| 347 | * @param cmd Command |
| 348 | * @return 0 on success, non-0 on error |
| 349 | * |
| 350 | * The remaining arguments are command arguments, terminated by (char |
| 351 | * *)0. They should be in UTF-8. |
| 352 | * |
| 353 | * 5xx responses count as errors. |
| 354 | * |
| 355 | * @p rp will NOT be filled in for xx9 responses (where it is just |
| 356 | * commentary for a command where it would normally be meaningful). |
| 357 | * |
| 358 | * NB that the response will NOT be converted to the local encoding |
| 359 | * nor will quotes be stripped. See dequote(). |
| 360 | */ |
| 361 | static int disorder_simple_split(disorder_client *c, |
| 362 | char ***vecp, |
| 363 | int *nvecp, |
| 364 | int expected, |
| 365 | const char *cmd, ...) { |
| 366 | va_list ap; |
| 367 | int ret; |
| 368 | char *r; |
| 369 | char **vec; |
| 370 | int nvec; |
| 371 | |
| 372 | va_start(ap, cmd); |
| 373 | ret = disorder_simple_v(c, &r, cmd, ap); |
| 374 | va_end(ap); |
| 375 | if(!ret) { |
| 376 | vec = split(r, &nvec, SPLIT_QUOTES, 0, 0); |
| 377 | xfree(r); |
| 378 | if(expected < 0 || nvec == expected) { |
| 379 | *vecp = vec; |
| 380 | *nvecp = nvec; |
| 381 | } else { |
| 382 | disorder_error(0, "malformed reply to %s", cmd); |
| 383 | c->last = "malformed reply"; |
| 384 | ret = -1; |
| 385 | free_strings(nvec, vec); |
| 386 | } |
| 387 | } |
| 388 | if(ret) { |
| 389 | *vecp = NULL; |
| 390 | *nvecp = 0; |
| 391 | } |
| 392 | return ret; |
| 393 | } |
| 394 | |
| 395 | /** @brief Dequote a result string |
| 396 | * @param rc 0 on success, non-0 on error |
| 397 | * @param rp Where result string is stored (UTF-8) |
| 398 | * @return @p rc |
| 399 | * |
| 400 | * This is used as a wrapper around disorder_simple() to dequote |
| 401 | * results in place. |
| 402 | */ |
| 403 | static int dequote(int rc, char **rp) { |
| 404 | char **rr; |
| 405 | |
| 406 | if(!rc) { |
| 407 | if((rr = split(*rp, 0, SPLIT_QUOTES, 0, 0)) && *rr) { |
| 408 | xfree(*rp); |
| 409 | *rp = *rr; |
| 410 | xfree(rr); |
| 411 | return 0; |
| 412 | } |
| 413 | disorder_error(0, "invalid reply: %s", *rp); |
| 414 | } |
| 415 | return rc; |
| 416 | } |
| 417 | |
| 418 | /** @brief Generic connection routine |
| 419 | * @param conf Configuration to follow |
| 420 | * @param c Client |
| 421 | * @param username Username to log in with or NULL |
| 422 | * @param password Password to log in with or NULL |
| 423 | * @param cookie Cookie to log in with or NULL |
| 424 | * @return 0 on success, non-0 on error |
| 425 | * |
| 426 | * @p cookie is tried first if not NULL. If it is NULL then @p |
| 427 | * username must not be. If @p username is not NULL then nor may @p |
| 428 | * password be. |
| 429 | */ |
| 430 | int disorder_connect_generic(struct config *conf, |
| 431 | disorder_client *c, |
| 432 | const char *username, |
| 433 | const char *password, |
| 434 | const char *cookie) { |
| 435 | SOCKET sd = INVALID_SOCKET; |
| 436 | int nrvec = 0, rc; |
| 437 | unsigned char *nonce = NULL; |
| 438 | size_t nl; |
| 439 | char *res = NULL; |
| 440 | char *r = NULL, **rvec = NULL; |
| 441 | const char *protocol, *algorithm, *challenge; |
| 442 | struct sockaddr *sa = NULL; |
| 443 | socklen_t salen; |
| 444 | char errbuf[1024]; |
| 445 | |
| 446 | if((salen = disorder_find_server(conf, |
| 447 | (c->trypriv ? 0 : DISORDER_FS_NOTPRIV), |
| 448 | &sa, &c->ident)) == (socklen_t)-1) |
| 449 | return -1; |
| 450 | c->input = 0; |
| 451 | c->output = 0; |
| 452 | if((sd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) { |
| 453 | byte_xasprintf((char **)&c->last, "socket: %s", |
| 454 | format_error(ec_socket, socket_error(), errbuf, sizeof errbuf)); |
| 455 | disorder_error(0, "%s", c->last); |
| 456 | return -1; |
| 457 | } |
| 458 | c->family = sa->sa_family; |
| 459 | if(connect(sd, sa, salen) < 0) { |
| 460 | byte_xasprintf((char **)&c->last, "connect: %s", |
| 461 | format_error(ec_socket, socket_error(), errbuf, sizeof errbuf)); |
| 462 | disorder_error(0, "%s", c->last); |
| 463 | goto error; |
| 464 | } |
| 465 | socketio_init(&c->sio, sd); |
| 466 | c->open = 1; |
| 467 | sd = INVALID_SOCKET; |
| 468 | c->output = sink_socketio(&c->sio); |
| 469 | c->input = source_socketio(&c->sio); |
| 470 | if((rc = disorder_simple(c, &r, 0, (const char *)0))) |
| 471 | goto error_rc; |
| 472 | if(!(rvec = split(r, &nrvec, SPLIT_QUOTES, 0, 0))) |
| 473 | goto error; |
| 474 | if(nrvec != 3) { |
| 475 | c->last = "cannot parse server greeting"; |
| 476 | disorder_error(0, "cannot parse server greeting %s", r); |
| 477 | goto error; |
| 478 | } |
| 479 | protocol = rvec[0]; |
| 480 | if(strcmp(protocol, "2")) { |
| 481 | c->last = "unknown protocol version"; |
| 482 | disorder_error(0, "unknown protocol version: %s", protocol); |
| 483 | goto error; |
| 484 | } |
| 485 | algorithm = rvec[1]; |
| 486 | challenge = rvec[2]; |
| 487 | if(!(nonce = unhex(challenge, &nl))) |
| 488 | goto error; |
| 489 | if(cookie) { |
| 490 | if(!dequote(disorder_simple(c, &c->user, "cookie", cookie, (char *)0), |
| 491 | &c->user)) |
| 492 | return 0; /* success */ |
| 493 | if(!username) { |
| 494 | c->last = "cookie failed and no username"; |
| 495 | disorder_error(0, "cookie did not work and no username available"); |
| 496 | goto error; |
| 497 | } |
| 498 | } |
| 499 | if(!(res = authhash(nonce, nl, password, algorithm))) { |
| 500 | c->last = "error computing authorization hash"; |
| 501 | goto error; |
| 502 | } |
| 503 | if((rc = disorder_simple(c, 0, "user", username, res, (char *)0))) |
| 504 | goto error_rc; |
| 505 | c->user = xstrdup(username); |
| 506 | xfree(res); |
| 507 | free_strings(nrvec, rvec); |
| 508 | xfree(nonce); |
| 509 | xfree(sa); |
| 510 | xfree(r); |
| 511 | return 0; |
| 512 | error: |
| 513 | rc = -1; |
| 514 | error_rc: |
| 515 | xfree(c->output); |
| 516 | c->output = NULL; |
| 517 | xfree(c->input); |
| 518 | c->input = NULL; |
| 519 | if(c->open) { socketio_close(&c->sio); c->open = 0; } |
| 520 | if(sd != INVALID_SOCKET) closesocket(sd); |
| 521 | return rc; |
| 522 | } |
| 523 | |
| 524 | /** @brief Connect a client with a specified username and password |
| 525 | * @param c Client |
| 526 | * @param username Username to log in with |
| 527 | * @param password Password to log in with |
| 528 | * @return 0 on success, non-0 on error |
| 529 | */ |
| 530 | int disorder_connect_user(disorder_client *c, |
| 531 | const char *username, |
| 532 | const char *password) { |
| 533 | return disorder_connect_generic(config, |
| 534 | c, |
| 535 | username, |
| 536 | password, |
| 537 | 0); |
| 538 | } |
| 539 | |
| 540 | /** @brief Connect a client |
| 541 | * @param c Client |
| 542 | * @return 0 on success, non-0 on error |
| 543 | * |
| 544 | * The connection will use the username and password found in @ref |
| 545 | * config, or directly from the database if no password is found and |
| 546 | * the database is readable (usually only for root). |
| 547 | */ |
| 548 | int disorder_connect(disorder_client *c) { |
| 549 | const char *username, *password; |
| 550 | |
| 551 | if(!(username = config->username)) { |
| 552 | c->last = "no username"; |
| 553 | disorder_error(0, "no username configured"); |
| 554 | return -1; |
| 555 | } |
| 556 | password = config->password; |
| 557 | /* If we're connecting as 'root' guess that we're the system root |
| 558 | * user (or the jukebox user), both of which can use the privileged |
| 559 | * socket. They can also furtle with the db directly: that is why |
| 560 | * privileged socket does not represent a privilege escalation. */ |
| 561 | if(!password |
| 562 | && !strcmp(username, "root")) |
| 563 | password = "anything will do for root"; |
| 564 | if(!password) { |
| 565 | /* Oh well */ |
| 566 | c->last = "no password"; |
| 567 | disorder_error(0, "no password configured for user '%s'", username); |
| 568 | return -1; |
| 569 | } |
| 570 | return disorder_connect_generic(config, |
| 571 | c, |
| 572 | username, |
| 573 | password, |
| 574 | 0); |
| 575 | } |
| 576 | |
| 577 | /** @brief Connect a client |
| 578 | * @param c Client |
| 579 | * @param cookie Cookie to log in with, or NULL |
| 580 | * @return 0 on success, non-0 on error |
| 581 | * |
| 582 | * If @p cookie is NULL or does not work then we attempt to log in as |
| 583 | * guest instead (so when the cookie expires only an extra round trip |
| 584 | * is needed rather than a complete new login). |
| 585 | */ |
| 586 | int disorder_connect_cookie(disorder_client *c, |
| 587 | const char *cookie) { |
| 588 | return disorder_connect_generic(config, |
| 589 | c, |
| 590 | "guest", |
| 591 | "", |
| 592 | cookie); |
| 593 | } |
| 594 | |
| 595 | /** @brief Close a client |
| 596 | * @param c Client |
| 597 | * @return 0 on succcess, non-0 on errior |
| 598 | * |
| 599 | * The client is still closed even on error. It might well be |
| 600 | * appropriate to ignore the return value. |
| 601 | */ |
| 602 | int disorder_close(disorder_client *c) { |
| 603 | int ret = 0; |
| 604 | |
| 605 | if(c->open) |
| 606 | socketio_close(&c->sio); |
| 607 | xfree(c->output); |
| 608 | c->output = NULL; |
| 609 | xfree(c->input); |
| 610 | c->input = NULL; |
| 611 | xfree(c->ident); |
| 612 | c->ident = 0; |
| 613 | xfree(c->user); |
| 614 | c->user = 0; |
| 615 | return ret; |
| 616 | } |
| 617 | |
| 618 | static void client_error(const char *msg, |
| 619 | void attribute((unused)) *u) { |
| 620 | disorder_error(0, "error parsing reply: %s", msg); |
| 621 | } |
| 622 | |
| 623 | /** @brief Get a single queue entry |
| 624 | * @param c Client |
| 625 | * @param cmd Command |
| 626 | * @param qp Where to store track information |
| 627 | * @return 0 on success, non-0 on error |
| 628 | */ |
| 629 | static int onequeue(disorder_client *c, const char *cmd, |
| 630 | struct queue_entry **qp) { |
| 631 | char *r; |
| 632 | struct queue_entry *q; |
| 633 | int rc; |
| 634 | |
| 635 | if((rc = disorder_simple(c, &r, cmd, (char *)0))) |
| 636 | return rc; |
| 637 | if(r) { |
| 638 | q = xmalloc(sizeof *q); |
| 639 | if(queue_unmarshall(q, r, client_error, 0)) |
| 640 | return -1; |
| 641 | *qp = q; |
| 642 | } else |
| 643 | *qp = 0; |
| 644 | return 0; |
| 645 | } |
| 646 | |
| 647 | /** @brief Fetch the queue, recent list, etc */ |
| 648 | static int readqueue(disorder_client *c, |
| 649 | struct queue_entry **qp) { |
| 650 | struct queue_entry *qh, **qt = &qh, *q; |
| 651 | char *l; |
| 652 | char errbuf[1024]; |
| 653 | |
| 654 | while(inputlines(c->ident, c->input, &l, '\n') >= 0) { |
| 655 | if(!strcmp(l, ".")) { |
| 656 | *qt = 0; |
| 657 | *qp = qh; |
| 658 | xfree(l); |
| 659 | return 0; |
| 660 | } |
| 661 | q = xmalloc(sizeof *q); |
| 662 | if(!queue_unmarshall(q, l, client_error, 0)) { |
| 663 | *qt = q; |
| 664 | qt = &q->next; |
| 665 | } |
| 666 | xfree(l); |
| 667 | } |
| 668 | if(source_err(c->input)) { |
| 669 | byte_xasprintf((char **)&c->last, "input error: %s", |
| 670 | format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); |
| 671 | } else { |
| 672 | c->last = "input error: unexpected EOF"; |
| 673 | } |
| 674 | disorder_error(0, "%s: %s", c->ident, c->last); |
| 675 | return -1; |
| 676 | } |
| 677 | |
| 678 | /** @brief Read a dot-stuffed list |
| 679 | * @param c Client |
| 680 | * @param vecp Where to store list (UTF-8) |
| 681 | * @param nvecp Where to store number of items, or NULL |
| 682 | * @return 0 on success, non-0 on error |
| 683 | * |
| 684 | * The list will have a final NULL not counted in @p nvecp. |
| 685 | */ |
| 686 | static int readlist(disorder_client *c, char ***vecp, int *nvecp) { |
| 687 | char *l; |
| 688 | struct vector v; |
| 689 | char errbuf[1024]; |
| 690 | |
| 691 | vector_init(&v); |
| 692 | while(inputlines(c->ident, c->input, &l, '\n') >= 0) { |
| 693 | if(!strcmp(l, ".")) { |
| 694 | vector_terminate(&v); |
| 695 | if(nvecp) |
| 696 | *nvecp = v.nvec; |
| 697 | *vecp = v.vec; |
| 698 | xfree(l); |
| 699 | return 0; |
| 700 | } |
| 701 | vector_append(&v, xstrdup(l + (*l == '.'))); |
| 702 | xfree(l); |
| 703 | } |
| 704 | if(source_err(c->input)) { |
| 705 | byte_xasprintf((char **)&c->last, "input error: %s", |
| 706 | format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); |
| 707 | } else { |
| 708 | c->last = "input error: unexpxected EOF"; |
| 709 | } |
| 710 | disorder_error(0, "%s: %s", c->ident, c->last); |
| 711 | return -1; |
| 712 | } |
| 713 | |
| 714 | /** @brief Return the user we logged in with |
| 715 | * @param c Client |
| 716 | * @return User name (owned by @p c, don't modify) |
| 717 | */ |
| 718 | char *disorder_user(disorder_client *c) { |
| 719 | return c->user; |
| 720 | } |
| 721 | |
| 722 | static void pairlist_error_handler(const char *msg, |
| 723 | void attribute((unused)) *u) { |
| 724 | disorder_error(0, "error handling key-value pair reply: %s", msg); |
| 725 | } |
| 726 | |
| 727 | /** @brief Get a list of key-value pairs |
| 728 | * @param c Client |
| 729 | * @param kp Where to store linked list of preferences |
| 730 | * @param cmd Command |
| 731 | * @param ... Arguments |
| 732 | * @return 0 on success, non-0 on error |
| 733 | */ |
| 734 | static int pairlist(disorder_client *c, struct kvp **kp, const char *cmd, ...) { |
| 735 | char **vec, **pvec; |
| 736 | int nvec, npvec, n, rc; |
| 737 | struct kvp *k; |
| 738 | va_list ap; |
| 739 | |
| 740 | va_start(ap, cmd); |
| 741 | rc = disorder_simple_v(c, 0, cmd, ap); |
| 742 | va_end(ap); |
| 743 | if(rc) |
| 744 | return rc; |
| 745 | if((rc = readlist(c, &vec, &nvec))) |
| 746 | return rc; |
| 747 | for(n = 0; n < nvec; ++n) { |
| 748 | if(!(pvec = split(vec[n], &npvec, SPLIT_QUOTES, pairlist_error_handler, 0))) |
| 749 | return -1; |
| 750 | if(npvec != 2) { |
| 751 | pairlist_error_handler("malformed response", 0); |
| 752 | return -1; |
| 753 | } |
| 754 | *kp = k = xmalloc(sizeof *k); |
| 755 | k->name = pvec[0]; |
| 756 | k->value = pvec[1]; |
| 757 | kp = &k->next; |
| 758 | xfree(pvec); |
| 759 | } |
| 760 | free_strings(nvec, vec); |
| 761 | *kp = 0; |
| 762 | return 0; |
| 763 | } |
| 764 | |
| 765 | #if _WIN32 |
| 766 | # define boolean bodge_boolean |
| 767 | #endif |
| 768 | |
| 769 | /** @brief Parse a boolean response |
| 770 | * @param cmd Command for use in error messsage |
| 771 | * @param value Result from server |
| 772 | * @param flagp Where to store result |
| 773 | * @return 0 on success, non-0 on error |
| 774 | */ |
| 775 | static int boolean(const char *cmd, const char *value, |
| 776 | int *flagp) { |
| 777 | if(!strcmp(value, "yes")) *flagp = 1; |
| 778 | else if(!strcmp(value, "no")) *flagp = 0; |
| 779 | else { |
| 780 | disorder_error(0, "malformed response to '%s'", cmd); |
| 781 | return -1; |
| 782 | } |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | /** @brief Log to a sink |
| 787 | * @param c Client |
| 788 | * @param s Sink to write log lines to |
| 789 | * @return 0 on success, non-0 on error |
| 790 | */ |
| 791 | int disorder_log(disorder_client *c, struct sink *s) { |
| 792 | char *l; |
| 793 | int rc; |
| 794 | char errbuf[1024]; |
| 795 | |
| 796 | if((rc = disorder_simple(c, 0, "log", (char *)0))) |
| 797 | return rc; |
| 798 | while(inputlines(c->ident, c->input, &l, '\n') >= 0 && strcmp(l, ".")) |
| 799 | if(sink_printf(s, "%s\n", l) < 0) return -1; |
| 800 | if(source_err(c->input)) { |
| 801 | byte_xasprintf((char **)&c->last, "input error: %s", |
| 802 | format_error(c->input->eclass, source_err(c->input), errbuf, sizeof errbuf)); |
| 803 | return -1; |
| 804 | } else if(source_eof(c->input)) { |
| 805 | byte_xasprintf((char **)&c->last, "input error: unexpected EOF"); |
| 806 | return -1; |
| 807 | } |
| 808 | |
| 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | #include "client-stubs.c" |
| 813 | |
| 814 | /* |
| 815 | Local Variables: |
| 816 | c-basic-offset:2 |
| 817 | comment-column:40 |
| 818 | End: |
| 819 | */ |