code.delx.au - pulseaudio/blob - src/pulsecore/socket-client.c

   1 /***
   2     This file is part of PulseAudio.
   3
   4     Copyright 2004-2006 Lennart Poettering
   5     Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7     PulseAudio is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU Lesser General Public License as
   9     published by the Free Software Foundation; either version 2.1 of the
  10     License, or (at your option) any later version.
  11
  12     PulseAudio is distributed in the hope that it will be useful, but
  13     WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15     Lesser General Public License for more details.
  16
  17     You should have received a copy of the GNU Lesser General Public
  18     License along with PulseAudio; if not, write to the Free Software
  19     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20     USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 /* #undef HAVE_LIBASYNCNS */
  28
  29 #include <unistd.h>
  30 #include <stdio.h>
  31 #include <errno.h>
  32 #include <string.h>
  33 #include <stdlib.h>
  34
  35 #ifdef HAVE_SYS_SOCKET_H
  36 #include <sys/socket.h>
  37 #endif
  38 #ifdef HAVE_SYS_UN_H
  39 #include <sys/un.h>
  40 #endif
  41 #ifdef HAVE_ARPA_INET_H
  42 #include <arpa/inet.h>
  43 #endif
  44 #ifdef HAVE_NETINET_IN_H
  45 #include <netinet/in.h>
  46 #endif
  47 #ifdef HAVE_NETDB_H
  48 #include <netdb.h>
  49 #endif
  50
  51 #ifdef HAVE_LIBASYNCNS
  52 #include <asyncns.h>
  53 #endif
  54
  55 #include <pulse/timeval.h>
  56 #include <pulse/xmalloc.h>
  57
  58 #include <pulsecore/winsock.h>
  59 #include <pulsecore/core-error.h>
  60 #include <pulsecore/socket-util.h>
  61 #include <pulsecore/core-util.h>
  62 #include <pulsecore/socket-util.h>
  63 #include <pulsecore/log.h>
  64 #include <pulsecore/parseaddr.h>
  65 #include <pulsecore/macro.h>
  66 #include <pulsecore/refcnt.h>
  67
  68 #include "socket-client.h"
  69
  70 #define CONNECT_TIMEOUT 5
  71
  72 struct pa_socket_client {
  73     PA_REFCNT_DECLARE;
  74     pa_mainloop_api *mainloop;
  75     int fd;
  76     pa_io_event *io_event;
  77     pa_time_event *timeout_event;
  78     pa_defer_event *defer_event;
  79     pa_socket_client_cb_t callback;
  80     void *userdata;
  81     pa_bool_t local;
  82 #ifdef HAVE_LIBASYNCNS
  83     asyncns_t *asyncns;
  84     asyncns_query_t * asyncns_query;
  85     pa_io_event *asyncns_io_event;
  86 #endif
  87 };
  88
  89 static pa_socket_client* socket_client_new(pa_mainloop_api *m) {
  90     pa_socket_client *c;
  91     pa_assert(m);
  92
  93     c = pa_xnew(pa_socket_client, 1);
  94     PA_REFCNT_INIT(c);
  95     c->mainloop = m;
  96     c->fd = -1;
  97     c->io_event = NULL;
  98     c->timeout_event = NULL;
  99     c->defer_event = NULL;
 100     c->callback = NULL;
 101     c->userdata = NULL;
 102     c->local = FALSE;
 103
 104 #ifdef HAVE_LIBASYNCNS
 105     c->asyncns = NULL;
 106     c->asyncns_io_event = NULL;
 107     c->asyncns_query = NULL;
 108 #endif
 109
 110     return c;
 111 }
 112
 113 static void free_events(pa_socket_client *c) {
 114     pa_assert(c);
 115
 116     if (c->io_event) {
 117         c->mainloop->io_free(c->io_event);
 118         c->io_event = NULL;
 119     }
 120
 121     if (c->timeout_event) {
 122         c->mainloop->time_free(c->timeout_event);
 123         c->timeout_event = NULL;
 124     }
 125
 126     if (c->defer_event) {
 127         c->mainloop->defer_free(c->defer_event);
 128         c->defer_event = NULL;
 129     }
 130 }
 131
 132 static void do_call(pa_socket_client *c) {
 133     pa_iochannel *io = NULL;
 134     int error;
 135     socklen_t lerror;
 136
 137     pa_assert(c);
 138     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 139     pa_assert(c->callback);
 140
 141     pa_socket_client_ref(c);
 142
 143     if (c->fd < 0)
 144         goto finish;
 145
 146     lerror = sizeof(error);
 147     if (getsockopt(c->fd, SOL_SOCKET, SO_ERROR, (void*)&error, &lerror) < 0) {
 148         pa_log("getsockopt(): %s", pa_cstrerror(errno));
 149         goto finish;
 150     }
 151
 152     if (lerror != sizeof(error)) {
 153         pa_log("getsockopt() returned invalid size.");
 154         goto finish;
 155     }
 156
 157     if (error != 0) {
 158         pa_log_debug("connect(): %s", pa_cstrerror(error));
 159         errno = error;
 160         goto finish;
 161     }
 162
 163     io = pa_iochannel_new(c->mainloop, c->fd, c->fd);
 164     pa_assert(io);
 165
 166 finish:
 167     if (!io && c->fd >= 0)
 168         pa_close(c->fd);
 169     c->fd = -1;
 170
 171     free_events(c);
 172
 173     pa_assert(c->callback);
 174     c->callback(c, io, c->userdata);
 175
 176     pa_socket_client_unref(c);
 177 }
 178
 179 static void connect_defer_cb(pa_mainloop_api *m, pa_defer_event *e, void *userdata) {
 180     pa_socket_client *c = userdata;
 181
 182     pa_assert(m);
 183     pa_assert(c);
 184     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 185     pa_assert(c->defer_event == e);
 186
 187     do_call(c);
 188 }
 189
 190 static void connect_io_cb(pa_mainloop_api*m, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 191     pa_socket_client *c = userdata;
 192
 193     pa_assert(m);
 194     pa_assert(c);
 195     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 196     pa_assert(c->io_event == e);
 197     pa_assert(fd >= 0);
 198
 199     do_call(c);
 200 }
 201
 202 static int do_connect(pa_socket_client *c, const struct sockaddr *sa, socklen_t len) {
 203     int r;
 204
 205     pa_assert(c);
 206     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 207     pa_assert(sa);
 208     pa_assert(len > 0);
 209
 210     pa_make_fd_nonblock(c->fd);
 211
 212     if ((r = connect(c->fd, sa, len)) < 0) {
 213 #ifdef OS_IS_WIN32
 214         if (WSAGetLastError() != EWOULDBLOCK) {
 215             pa_log_debug("connect(): %d", WSAGetLastError());
 216 #else
 217         if (errno != EINPROGRESS) {
 218             pa_log_debug("connect(): %s (%d)", pa_cstrerror(errno), errno);
 219 #endif
 220             return -1;
 221         }
 222
 223         pa_assert_se(c->io_event = c->mainloop->io_new(c->mainloop, c->fd, PA_IO_EVENT_OUTPUT, connect_io_cb, c));
 224     } else
 225         pa_assert_se(c->defer_event = c->mainloop->defer_new(c->mainloop, connect_defer_cb, c));
 226
 227     return 0;
 228 }
 229
 230 pa_socket_client* pa_socket_client_new_ipv4(pa_mainloop_api *m, uint32_t address, uint16_t port) {
 231     struct sockaddr_in sa;
 232
 233     pa_assert(m);
 234     pa_assert(port > 0);
 235
 236     memset(&sa, 0, sizeof(sa));
 237     sa.sin_family = AF_INET;
 238     sa.sin_port = htons(port);
 239     sa.sin_addr.s_addr = htonl(address);
 240
 241     return pa_socket_client_new_sockaddr(m, (struct sockaddr*) &sa, sizeof(sa));
 242 }
 243
 244 #ifdef HAVE_SYS_UN_H
 245
 246 pa_socket_client* pa_socket_client_new_unix(pa_mainloop_api *m, const char *filename) {
 247     struct sockaddr_un sa;
 248
 249     pa_assert(m);
 250     pa_assert(filename);
 251
 252     memset(&sa, 0, sizeof(sa));
 253     sa.sun_family = AF_UNIX;
 254     pa_strlcpy(sa.sun_path, filename, sizeof(sa.sun_path));
 255
 256     return pa_socket_client_new_sockaddr(m, (struct sockaddr*) &sa, sizeof(sa));
 257 }
 258
 259 #else /* HAVE_SYS_UN_H */
 260
 261 pa_socket_client* pa_socket_client_new_unix(pa_mainloop_api *m, const char *filename) {
 262     return NULL;
 263 }
 264
 265 #endif /* HAVE_SYS_UN_H */
 266
 267 static int sockaddr_prepare(pa_socket_client *c, const struct sockaddr *sa, size_t salen) {
 268     pa_assert(c);
 269     pa_assert(sa);
 270     pa_assert(salen);
 271
 272     c->local = pa_socket_address_is_local(sa);
 273
 274     if ((c->fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) {
 275         pa_log("socket(): %s", pa_cstrerror(errno));
 276         return -1;
 277     }
 278
 279     pa_make_fd_cloexec(c->fd);
 280
 281 #ifdef HAVE_IPV6
 282     if (sa->sa_family == AF_INET || sa->sa_family == AF_INET6)
 283 #else
 284     if (sa->sa_family == AF_INET)
 285 #endif
 286         pa_make_tcp_socket_low_delay(c->fd);
 287     else
 288         pa_make_socket_low_delay(c->fd);
 289
 290     if (do_connect(c, sa, (socklen_t) salen) < 0)
 291         return -1;
 292
 293     return 0;
 294 }
 295
 296 pa_socket_client* pa_socket_client_new_sockaddr(pa_mainloop_api *m, const struct sockaddr *sa, size_t salen) {
 297     pa_socket_client *c;
 298
 299     pa_assert(m);
 300     pa_assert(sa);
 301     pa_assert(salen > 0);
 302
 303     pa_assert_se(c = socket_client_new(m));
 304
 305     if (sockaddr_prepare(c, sa, salen) < 0)
 306         goto fail;
 307
 308     return c;
 309
 310 fail:
 311     pa_socket_client_unref(c);
 312     return NULL;
 313 }
 314
 315 static void socket_client_free(pa_socket_client *c) {
 316     pa_assert(c);
 317     pa_assert(c->mainloop);
 318
 319     free_events(c);
 320
 321     if (c->fd >= 0)
 322         pa_close(c->fd);
 323
 324 #ifdef HAVE_LIBASYNCNS
 325     if (c->asyncns_query)
 326         asyncns_cancel(c->asyncns, c->asyncns_query);
 327     if (c->asyncns)
 328         asyncns_free(c->asyncns);
 329     if (c->asyncns_io_event)
 330         c->mainloop->io_free(c->asyncns_io_event);
 331 #endif
 332
 333     pa_xfree(c);
 334 }
 335
 336 void pa_socket_client_unref(pa_socket_client *c) {
 337     pa_assert(c);
 338     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 339
 340     if (PA_REFCNT_DEC(c) <= 0)
 341         socket_client_free(c);
 342 }
 343
 344 pa_socket_client* pa_socket_client_ref(pa_socket_client *c) {
 345     pa_assert(c);
 346     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 347
 348     PA_REFCNT_INC(c);
 349     return c;
 350 }
 351
 352 void pa_socket_client_set_callback(pa_socket_client *c, pa_socket_client_cb_t on_connection, void *userdata) {
 353     pa_assert(c);
 354     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 355
 356     c->callback = on_connection;
 357     c->userdata = userdata;
 358 }
 359
 360 #ifdef HAVE_IPV6
 361 pa_socket_client* pa_socket_client_new_ipv6(pa_mainloop_api *m, uint8_t address[16], uint16_t port) {
 362     struct sockaddr_in6 sa;
 363
 364     pa_assert(m);
 365     pa_assert(address);
 366     pa_assert(port > 0);
 367
 368     memset(&sa, 0, sizeof(sa));
 369     sa.sin6_family = AF_INET6;
 370     sa.sin6_port = htons(port);
 371     memcpy(&sa.sin6_addr, address, sizeof(sa.sin6_addr));
 372
 373     return pa_socket_client_new_sockaddr(m, (struct sockaddr*) &sa, sizeof(sa));
 374 }
 375 #endif
 376
 377 #ifdef HAVE_LIBASYNCNS
 378
 379 static void asyncns_cb(pa_mainloop_api*m, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
 380     pa_socket_client *c = userdata;
 381     struct addrinfo *res = NULL;
 382     int ret;
 383
 384     pa_assert(m);
 385     pa_assert(c);
 386     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 387     pa_assert(c->asyncns_io_event == e);
 388     pa_assert(fd >= 0);
 389
 390     if (asyncns_wait(c->asyncns, 0) < 0)
 391         goto fail;
 392
 393     if (!asyncns_isdone(c->asyncns, c->asyncns_query))
 394         return;
 395
 396     ret = asyncns_getaddrinfo_done(c->asyncns, c->asyncns_query, &res);
 397     c->asyncns_query = NULL;
 398
 399     if (ret != 0 || !res)
 400         goto fail;
 401
 402     if (res->ai_addr)
 403         sockaddr_prepare(c, res->ai_addr, res->ai_addrlen);
 404
 405     asyncns_freeaddrinfo(res);
 406
 407     m->io_free(c->asyncns_io_event);
 408     c->asyncns_io_event = NULL;
 409     return;
 410
 411 fail:
 412     m->io_free(c->asyncns_io_event);
 413     c->asyncns_io_event = NULL;
 414
 415     errno = EHOSTUNREACH;
 416     do_call(c);
 417     return;
 418
 419 }
 420
 421 #endif
 422
 423 static void timeout_cb(pa_mainloop_api *m, pa_time_event *e, const struct timeval *tv, void *userdata) {
 424     pa_socket_client *c = userdata;
 425
 426     pa_assert(m);
 427     pa_assert(e);
 428     pa_assert(tv);
 429     pa_assert(c);
 430
 431     if (c->fd >= 0) {
 432         pa_close(c->fd);
 433         c->fd = -1;
 434     }
 435
 436     errno = ETIMEDOUT;
 437     do_call(c);
 438 }
 439
 440 static void start_timeout(pa_socket_client *c) {
 441     struct timeval tv;
 442     pa_assert(c);
 443     pa_assert(!c->timeout_event);
 444
 445     pa_gettimeofday(&tv);
 446     pa_timeval_add(&tv, CONNECT_TIMEOUT * PA_USEC_PER_SEC);
 447     c->timeout_event = c->mainloop->time_new(c->mainloop, &tv, timeout_cb, c);
 448 }
 449
 450 pa_socket_client* pa_socket_client_new_string(pa_mainloop_api *m, const char*name, uint16_t default_port) {
 451     pa_socket_client *c = NULL;
 452     pa_parsed_address a;
 453
 454     pa_assert(m);
 455     pa_assert(name);
 456
 457     if (pa_parse_address(name, &a) < 0)
 458         return NULL;
 459
 460     if (!a.port)
 461         a.port = default_port;
 462
 463     switch (a.type) {
 464         case PA_PARSED_ADDRESS_UNIX:
 465             if ((c = pa_socket_client_new_unix(m, a.path_or_host)))
 466                 start_timeout(c);
 467             break;
 468
 469         case PA_PARSED_ADDRESS_TCP4:  /* Fallthrough */
 470         case PA_PARSED_ADDRESS_TCP6:  /* Fallthrough */
 471         case PA_PARSED_ADDRESS_TCP_AUTO:{
 472
 473             struct addrinfo hints;
 474             char port[12];
 475
 476             pa_snprintf(port, sizeof(port), "%u", (unsigned) a.port);
 477
 478             memset(&hints, 0, sizeof(hints));
 479             if (a.type == PA_PARSED_ADDRESS_TCP4)
 480                 hints.ai_family = PF_INET;
 481 #ifdef HAVE_IPV6
 482             else if (a.type == PA_PARSED_ADDRESS_TCP6)
 483                 hints.ai_family = PF_INET6;
 484 #endif
 485             else
 486                 hints.ai_family = PF_UNSPEC;
 487
 488             hints.ai_socktype = SOCK_STREAM;
 489
 490 #if defined(HAVE_LIBASYNCNS)
 491             {
 492                 asyncns_t *asyncns;
 493
 494                 if (!(asyncns = asyncns_new(1)))
 495                     goto finish;
 496
 497                 pa_assert_se(c = socket_client_new(m));
 498                 c->asyncns = asyncns;
 499                 c->asyncns_io_event = m->io_new(m, asyncns_fd(c->asyncns), PA_IO_EVENT_INPUT, asyncns_cb, c);
 500                 c->asyncns_query = asyncns_getaddrinfo(c->asyncns, a.path_or_host, port, &hints);
 501                 pa_assert(c->asyncns_query);
 502                 start_timeout(c);
 503             }
 504 #elif defined(HAVE_GETADDRINFO)
 505             {
 506                 int ret;
 507                 struct addrinfo *res = NULL;
 508
 509                 ret = getaddrinfo(a.path_or_host, port, &hints, &res);
 510
 511                 if (ret < 0 || !res)
 512                     goto finish;
 513
 514                 if (res->ai_addr) {
 515                     if ((c = pa_socket_client_new_sockaddr(m, res->ai_addr, res->ai_addrlen)))
 516                         start_timeout(c);
 517                 }
 518
 519                 freeaddrinfo(res);
 520             }
 521 #else
 522             {
 523                 struct hostent *host = NULL;
 524                 struct sockaddr_in s;
 525
 526 #ifdef HAVE_IPV6
 527                 /* FIXME: PF_INET6 support */
 528                 if (hints.ai_family == PF_INET6) {
 529                     pa_log_error("IPv6 is not supported on Windows");
 530                     goto finish;
 531                 }
 532 #endif
 533
 534                 host = gethostbyname(a.path_or_host);
 535                 if (!host) {
 536                     unsigned int addr = inet_addr(a.path_or_host);
 537                     if (addr != INADDR_NONE)
 538                         host = gethostbyaddr((char*)&addr, 4, AF_INET);
 539                 }
 540
 541                 if (!host)
 542                     goto finish;
 543
 544                 s.sin_family = AF_INET;
 545                 memcpy(&s.sin_addr, host->h_addr, sizeof(struct in_addr));
 546                 s.sin_port = htons(a.port);
 547
 548                 if ((c = pa_socket_client_new_sockaddr(m, (struct sockaddr*)&s, sizeof(s))))
 549                     start_timeout(c);
 550             }
 551 #endif /* HAVE_LIBASYNCNS */
 552         }
 553     }
 554
 555 finish:
 556     pa_xfree(a.path_or_host);
 557     return c;
 558
 559 }
 560
 561 /* Return non-zero when the target sockaddr is considered
 562    local. "local" means UNIX socket or TCP socket on localhost. Other
 563    local IP addresses are not considered local. */
 564 pa_bool_t pa_socket_client_is_local(pa_socket_client *c) {
 565     pa_assert(c);
 566     pa_assert(PA_REFCNT_VALUE(c) >= 1);
 567
 568     return c->local;
 569 }