diff options
Diffstat (limited to 'src/pulse/context.c')
| -rw-r--r-- | src/pulse/context.c | 1650 |
1 files changed, 1650 insertions, 0 deletions
diff --git a/src/pulse/context.c b/src/pulse/context.c new file mode 100644 index 0000000..1d1bb9e --- /dev/null +++ b/src/pulse/context.c @@ -0,0 +1,1650 @@ +/*** + This file is part of PulseAudio. + + Copyright 2004-2008 Lennart Poettering + Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2.1 of the License, + or (at your option) any later version. + + PulseAudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <unistd.h> +#include <sys/stat.h> +#include <errno.h> +#include <signal.h> + +#ifdef HAVE_SYS_WAIT_H +#include <sys/wait.h> +#endif + +#ifdef HAVE_NETDB_H +#include <netdb.h> +#endif + +#include <pulse/version.h> +#include <pulse/xmalloc.h> +#include <pulse/util.h> +#include <pulse/mainloop.h> +#include <pulse/timeval.h> +#include <pulse/fork-detect.h> +#include <pulse/client-conf.h> + +#include <pulsecore/core-error.h> +#include <pulsecore/i18n.h> +#include <pulsecore/native-common.h> +#include <pulsecore/pdispatch.h> +#include <pulsecore/pstream.h> +#include <pulsecore/hashmap.h> +#include <pulsecore/socket-client.h> +#include <pulsecore/pstream-util.h> +#include <pulsecore/core-rtclock.h> +#include <pulsecore/core-util.h> +#include <pulsecore/log.h> +#include <pulsecore/socket.h> +#include <pulsecore/creds.h> +#include <pulsecore/macro.h> +#include <pulsecore/proplist-util.h> + +#include "internal.h" +#include "context.h" + +void pa_command_extension(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void pa_command_enable_srbchannel(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void pa_command_disable_srbchannel(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void pa_command_register_memfd_shmid(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); + +static const pa_pdispatch_cb_t command_table[PA_COMMAND_MAX] = { + [PA_COMMAND_REQUEST] = pa_command_request, + [PA_COMMAND_OVERFLOW] = pa_command_overflow_or_underflow, + [PA_COMMAND_UNDERFLOW] = pa_command_overflow_or_underflow, + [PA_COMMAND_PLAYBACK_STREAM_KILLED] = pa_command_stream_killed, + [PA_COMMAND_RECORD_STREAM_KILLED] = pa_command_stream_killed, + [PA_COMMAND_PLAYBACK_STREAM_MOVED] = pa_command_stream_moved, + [PA_COMMAND_RECORD_STREAM_MOVED] = pa_command_stream_moved, + [PA_COMMAND_PLAYBACK_STREAM_SUSPENDED] = pa_command_stream_suspended, + [PA_COMMAND_RECORD_STREAM_SUSPENDED] = pa_command_stream_suspended, + [PA_COMMAND_STARTED] = pa_command_stream_started, + [PA_COMMAND_SUBSCRIBE_EVENT] = pa_command_subscribe_event, + [PA_COMMAND_EXTENSION] = pa_command_extension, + [PA_COMMAND_PLAYBACK_STREAM_EVENT] = pa_command_stream_event, + [PA_COMMAND_RECORD_STREAM_EVENT] = pa_command_stream_event, + [PA_COMMAND_CLIENT_EVENT] = pa_command_client_event, + [PA_COMMAND_PLAYBACK_BUFFER_ATTR_CHANGED] = pa_command_stream_buffer_attr, + [PA_COMMAND_RECORD_BUFFER_ATTR_CHANGED] = pa_command_stream_buffer_attr, + [PA_COMMAND_ENABLE_SRBCHANNEL] = pa_command_enable_srbchannel, + [PA_COMMAND_DISABLE_SRBCHANNEL] = pa_command_disable_srbchannel, + [PA_COMMAND_REGISTER_MEMFD_SHMID] = pa_command_register_memfd_shmid, +}; +static void context_free(pa_context *c); + +#ifdef HAVE_DBUS +static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata); +#endif + +pa_context *pa_context_new(pa_mainloop_api *mainloop, const char *name) { + return pa_context_new_with_proplist(mainloop, name, NULL); +} + +static void reset_callbacks(pa_context *c) { + pa_assert(c); + + c->state_callback = NULL; + c->state_userdata = NULL; + + c->subscribe_callback = NULL; + c->subscribe_userdata = NULL; + + c->event_callback = NULL; + c->event_userdata = NULL; + + c->ext_device_manager.callback = NULL; + c->ext_device_manager.userdata = NULL; + + c->ext_device_restore.callback = NULL; + c->ext_device_restore.userdata = NULL; + + c->ext_stream_restore.callback = NULL; + c->ext_stream_restore.userdata = NULL; +} + +pa_context *pa_context_new_with_proplist(pa_mainloop_api *mainloop, const char *name, const pa_proplist *p) { + pa_context *c; + pa_mem_type_t type; + + pa_assert(mainloop); + + if (pa_detect_fork()) + return NULL; + + pa_init_i18n(); + + c = pa_xnew0(pa_context, 1); + PA_REFCNT_INIT(c); + + c->error = pa_xnew0(pa_context_error, 1); + assert(c->error); + + c->proplist = p ? pa_proplist_copy(p) : pa_proplist_new(); + + if (name) + pa_proplist_sets(c->proplist, PA_PROP_APPLICATION_NAME, name); + +#ifdef HAVE_DBUS + c->system_bus = c->session_bus = NULL; +#endif + c->mainloop = mainloop; + c->playback_streams = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func); + c->record_streams = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func); + c->client_index = PA_INVALID_INDEX; + c->use_rtclock = pa_mainloop_is_our_api(mainloop); + + PA_LLIST_HEAD_INIT(pa_stream, c->streams); + PA_LLIST_HEAD_INIT(pa_operation, c->operations); + + c->error->error = PA_OK; + c->state = PA_CONTEXT_UNCONNECTED; + + reset_callbacks(c); + +#ifndef MSG_NOSIGNAL +#ifdef SIGPIPE + pa_check_signal_is_blocked(SIGPIPE); +#endif +#endif + + c->conf = pa_client_conf_new(); + pa_client_conf_load(c->conf, true, true); + + c->srb_template.readfd = -1; + c->srb_template.writefd = -1; + + c->memfd_on_local = (!c->conf->disable_memfd && pa_memfd_is_locally_supported()); + + type = (c->conf->disable_shm) ? PA_MEM_TYPE_PRIVATE : + ((!c->memfd_on_local) ? + PA_MEM_TYPE_SHARED_POSIX : PA_MEM_TYPE_SHARED_MEMFD); + + if (!(c->mempool = pa_mempool_new(type, c->conf->shm_size, true))) { + + if (!c->conf->disable_shm) { + pa_log_warn("Failed to allocate shared memory pool. Falling back to a normal private one."); + c->mempool = pa_mempool_new(PA_MEM_TYPE_PRIVATE, c->conf->shm_size, true); + } + + if (!c->mempool) { + context_free(c); + return NULL; + } + } + + return c; +} + +static void context_unlink(pa_context *c) { + pa_stream *s; + + pa_assert(c); + + s = c->streams ? pa_stream_ref(c->streams) : NULL; + while (s) { + pa_stream *n = s->next ? pa_stream_ref(s->next) : NULL; + pa_stream_set_state(s, c->state == PA_CONTEXT_FAILED ? PA_STREAM_FAILED : PA_STREAM_TERMINATED); + pa_stream_unref(s); + s = n; + } + + while (c->operations) + pa_operation_cancel(c->operations); + + if (c->pdispatch) { + pa_pdispatch_unref(c->pdispatch); + c->pdispatch = NULL; + } + + if (c->pstream) { + pa_pstream_unlink(c->pstream); + pa_pstream_unref(c->pstream); + c->pstream = NULL; + } + + if (c->srb_template.memblock) { + pa_memblock_unref(c->srb_template.memblock); + c->srb_template.memblock = NULL; + } + + if (c->client) { + pa_socket_client_unref(c->client); + c->client = NULL; + } + + reset_callbacks(c); +} + +static void context_free(pa_context *c) { + pa_assert(c); + + context_unlink(c); + +#ifdef HAVE_DBUS + if (c->system_bus) { + if (c->filter_added) + dbus_connection_remove_filter(pa_dbus_wrap_connection_get(c->system_bus), filter_cb, c); + pa_dbus_wrap_connection_free(c->system_bus); + } + + if (c->session_bus) { + if (c->filter_added) + dbus_connection_remove_filter(pa_dbus_wrap_connection_get(c->session_bus), filter_cb, c); + pa_dbus_wrap_connection_free(c->session_bus); + } +#endif + + if (c->record_streams) + pa_hashmap_free(c->record_streams); + if (c->playback_streams) + pa_hashmap_free(c->playback_streams); + + if (c->mempool) + pa_mempool_unref(c->mempool); + + if (c->conf) + pa_client_conf_free(c->conf); + + pa_strlist_free(c->server_list); + + if (c->proplist) + pa_proplist_free(c->proplist); + + pa_xfree(c->server); + pa_xfree(c->error); + pa_xfree(c); +} + +pa_context* pa_context_ref(pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_REFCNT_INC(c); + return c; +} + +void pa_context_unref(pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (PA_REFCNT_DEC(c) <= 0) + context_free(c); +} + +void pa_context_set_state(pa_context *c, pa_context_state_t st) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (c->state == st) + return; + + pa_context_ref(c); + + c->state = st; + + if (c->state_callback) + c->state_callback(c, c->state_userdata); + + if (st == PA_CONTEXT_FAILED || st == PA_CONTEXT_TERMINATED) + context_unlink(c); + + pa_context_unref(c); +} + +int pa_context_set_error(const pa_context *c, int error) { + pa_assert(error >= 0); + pa_assert(error < PA_ERR_MAX); + + if (c) + c->error->error = error; + + return error; +} + +void pa_context_fail(pa_context *c, int error) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + pa_context_set_error(c, error); + pa_context_set_state(c, PA_CONTEXT_FAILED); +} + +static void pstream_die_callback(pa_pstream *p, void *userdata) { + pa_context *c = userdata; + + pa_assert(p); + pa_assert(c); + + pa_context_fail(c, PA_ERR_CONNECTIONTERMINATED); +} + +static void pstream_packet_callback(pa_pstream *p, pa_packet *packet, pa_cmsg_ancil_data *ancil_data, void *userdata) { + pa_context *c = userdata; + + pa_assert(p); + pa_assert(packet); + pa_assert(c); + + pa_context_ref(c); + + if (pa_pdispatch_run(c->pdispatch, packet, ancil_data, c) < 0) + pa_context_fail(c, PA_ERR_PROTOCOL); + + pa_context_unref(c); +} + +static void handle_srbchannel_memblock(pa_context *c, pa_memblock *memblock) { + pa_srbchannel *sr; + pa_tagstruct *t; + + pa_assert(c); + + /* Memblock sanity check */ + if (!memblock) { + pa_context_fail(c, PA_ERR_PROTOCOL); + return; + } else if (pa_memblock_is_read_only(memblock)) { + pa_context_fail(c, PA_ERR_PROTOCOL); + return; + } else if (pa_memblock_is_ours(memblock)) { + pa_context_fail(c, PA_ERR_PROTOCOL); + return; + } + + /* Create the srbchannel */ + c->srb_template.memblock = memblock; + pa_memblock_ref(memblock); + sr = pa_srbchannel_new_from_template(c->mainloop, &c->srb_template); + if (!sr) { + pa_log_warn("Failed to create srbchannel from template"); + c->srb_template.readfd = -1; + c->srb_template.writefd = -1; + pa_memblock_unref(c->srb_template.memblock); + c->srb_template.memblock = NULL; + return; + } + + /* Ack the enable command */ + t = pa_tagstruct_new(); + pa_tagstruct_putu32(t, PA_COMMAND_ENABLE_SRBCHANNEL); + pa_tagstruct_putu32(t, c->srb_setup_tag); + pa_pstream_send_tagstruct(c->pstream, t); + + /* ...and switch over */ + pa_pstream_set_srbchannel(c->pstream, sr); +} + +static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t offset, pa_seek_mode_t seek, const pa_memchunk *chunk, void *userdata) { + pa_context *c = userdata; + pa_stream *s; + + pa_assert(p); + pa_assert(chunk); + pa_assert(chunk->length > 0); + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + pa_context_ref(c); + + if (c->srb_template.readfd != -1 && c->srb_template.memblock == NULL) { + handle_srbchannel_memblock(c, chunk->memblock); + pa_context_unref(c); + return; + } + + if ((s = pa_hashmap_get(c->record_streams, PA_UINT32_TO_PTR(channel)))) { + + if (chunk->memblock) { + pa_memblockq_seek(s->record_memblockq, offset, seek, true); + pa_memblockq_push_align(s->record_memblockq, chunk); + } else + pa_memblockq_seek(s->record_memblockq, offset+chunk->length, seek, true); + + if (s->read_callback) { + size_t l; + + if ((l = pa_memblockq_get_length(s->record_memblockq)) > 0) + s->read_callback(s, l, s->read_userdata); + } + } + + pa_context_unref(c); +} + +int pa_context_handle_error(pa_context *c, uint32_t command, pa_tagstruct *t, bool fail) { + uint32_t err; + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (command == PA_COMMAND_ERROR) { + pa_assert(t); + + if (pa_tagstruct_getu32(t, &err) < 0 || + !pa_tagstruct_eof(t)) { + pa_context_fail(c, PA_ERR_PROTOCOL); + return -1; + } + + } else if (command == PA_COMMAND_TIMEOUT) + err = PA_ERR_TIMEOUT; + else { + pa_context_fail(c, PA_ERR_PROTOCOL); + return -1; + } + + if (err == PA_OK) { + pa_context_fail(c, PA_ERR_PROTOCOL); + return -1; + } + + if (err >= PA_ERR_MAX) + err = PA_ERR_UNKNOWN; + + if (fail) { + pa_context_fail(c, (int) err); + return -1; + } + + pa_context_set_error(c, (int) err); + + return 0; +} + +static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + + pa_assert(pd); + pa_assert(c); + pa_assert(c->state == PA_CONTEXT_AUTHORIZING || c->state == PA_CONTEXT_SETTING_NAME); + + pa_context_ref(c); + + if (command != PA_COMMAND_REPLY) { + pa_context_handle_error(c, command, t, true); + goto finish; + } + + switch(c->state) { + case PA_CONTEXT_AUTHORIZING: { + pa_tagstruct *reply; + bool shm_on_remote = false; + bool memfd_on_remote = false; + + if (pa_tagstruct_getu32(t, &c->version) < 0 || + !pa_tagstruct_eof(t)) { + pa_context_fail(c, PA_ERR_PROTOCOL); + goto finish; + } + + /* Minimum supported version */ + if (c->version < 8) { + pa_context_fail(c, PA_ERR_VERSION); + goto finish; + } + + /* Starting with protocol version 13 the MSB of the version + tag reflects if shm is available for this connection or + not. */ + if ((c->version & PA_PROTOCOL_VERSION_MASK) >= 13) { + shm_on_remote = !!(c->version & PA_PROTOCOL_FLAG_SHM); + + /* Starting with protocol version 31, the second MSB of the version + * tag reflects whether memfd is supported on the other PA end. */ + if ((c->version & PA_PROTOCOL_VERSION_MASK) >= 31) + memfd_on_remote = !!(c->version & PA_PROTOCOL_FLAG_MEMFD); + + /* Reserve the two most-significant _bytes_ of the version tag + * for flags. */ + c->version &= PA_PROTOCOL_VERSION_MASK; + } + + pa_log_debug("Protocol version: remote %u, local %u", c->version, PA_PROTOCOL_VERSION); + + /* Enable shared memory support if possible */ + if (c->do_shm) + if (c->version < 10 || (c->version >= 13 && !shm_on_remote)) + c->do_shm = false; + + if (c->do_shm) { + + /* Only enable SHM if both sides are owned by the same + * user. This is a security measure because otherwise + * data private to the user might leak. */ + +#ifdef HAVE_CREDS + const pa_creds *creds; + if (!(creds = pa_pdispatch_creds(pd)) || getuid() != creds->uid) + c->do_shm = false; +#endif + } + + pa_log_debug("Negotiated SHM: %s", pa_yes_no(c->do_shm)); + pa_pstream_enable_shm(c->pstream, c->do_shm); + + c->shm_type = PA_MEM_TYPE_PRIVATE; + if (c->do_shm) { + if (c->version >= 31 && memfd_on_remote && c->memfd_on_local) { + const char *reason; + + pa_pstream_enable_memfd(c->pstream); + if (pa_mempool_is_memfd_backed(c->mempool)) + if (pa_pstream_register_memfd_mempool(c->pstream, c->mempool, &reason)) + pa_log("Failed to regester memfd mempool. Reason: %s", reason); + + /* Even if memfd pool registration fails, the negotiated SHM type + * shall remain memfd as both endpoints claim to support it. */ + c->shm_type = PA_MEM_TYPE_SHARED_MEMFD; + } else + c->shm_type = PA_MEM_TYPE_SHARED_POSIX; + } + + pa_log_debug("Memfd possible: %s", pa_yes_no(c->memfd_on_local)); + pa_log_debug("Negotiated SHM type: %s", pa_mem_type_to_string(c->shm_type)); + + reply = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag); + + if (c->version >= 13) { + pa_init_proplist(c->proplist); + pa_tagstruct_put_proplist(reply, c->proplist); + } else + pa_tagstruct_puts(reply, pa_proplist_gets(c->proplist, PA_PROP_APPLICATION_NAME)); + + pa_pstream_send_tagstruct(c->pstream, reply); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL); + + pa_context_set_state(c, PA_CONTEXT_SETTING_NAME); + break; + } + + case PA_CONTEXT_SETTING_NAME : + + if ((c->version >= 13 && (pa_tagstruct_getu32(t, &c->client_index) < 0 || + c->client_index == PA_INVALID_INDEX)) || + !pa_tagstruct_eof(t)) { + pa_context_fail(c, PA_ERR_PROTOCOL); + goto finish; + } + + pa_context_set_state(c, PA_CONTEXT_READY); + break; + + default: + pa_assert_not_reached(); + } + +finish: + pa_context_unref(c); +} + +static void setup_context(pa_context *c, pa_iochannel *io) { + uint8_t cookie[PA_NATIVE_COOKIE_LENGTH]; + pa_tagstruct *t; + uint32_t tag; + + pa_assert(c); + pa_assert(io); + + pa_context_ref(c); + + pa_assert(!c->pstream); + c->pstream = pa_pstream_new(c->mainloop, io, c->mempool); + + pa_pstream_set_die_callback(c->pstream, pstream_die_callback, c); + pa_pstream_set_receive_packet_callback(c->pstream, pstream_packet_callback, c); + pa_pstream_set_receive_memblock_callback(c->pstream, pstream_memblock_callback, c); + + pa_assert(!c->pdispatch); + c->pdispatch = pa_pdispatch_new(c->mainloop, c->use_rtclock, command_table, PA_COMMAND_MAX); + + if (pa_client_conf_load_cookie(c->conf, cookie, sizeof(cookie)) < 0) + pa_log_info("No cookie loaded. Attempting to connect without."); + + t = pa_tagstruct_command(c, PA_COMMAND_AUTH, &tag); + + c->do_shm = + pa_mempool_is_shared(c->mempool) && + c->is_local; + + pa_log_debug("SHM possible: %s", pa_yes_no(c->do_shm)); + + /* Starting with protocol version 13 we use the MSB of the version + * tag for informing the other side if we could do SHM or not. + * Starting from version 31, second MSB is used to flag memfd support. */ + pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION | (c->do_shm ? PA_PROTOCOL_FLAG_SHM : 0) | + (c->memfd_on_local ? PA_PROTOCOL_FLAG_MEMFD: 0)); + pa_tagstruct_put_arbitrary(t, cookie, sizeof(cookie)); + +#ifdef HAVE_CREDS +{ + pa_creds ucred; + + if (pa_iochannel_creds_supported(io)) + pa_iochannel_creds_enable(io); + + ucred.uid = getuid(); + ucred.gid = getgid(); + + pa_pstream_send_tagstruct_with_creds(c->pstream, t, &ucred); +} +#else + pa_pstream_send_tagstruct(c->pstream, t); +#endif + + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, c, NULL); + + pa_context_set_state(c, PA_CONTEXT_AUTHORIZING); + + pa_context_unref(c); +} + +static pa_strlist *prepend_per_user(pa_strlist *l) { + char *ufn; + + /* The per-user instance */ + if ((ufn = pa_runtime_path(PA_NATIVE_DEFAULT_UNIX_SOCKET))) { + l = pa_strlist_prepend(l, ufn); + pa_xfree(ufn); + } + + return l; +} + +#ifndef OS_IS_WIN32 + +static int context_autospawn(pa_context *c) { + pid_t pid; + int status, r; + struct sigaction sa; + + pa_context_ref(c); + + if (sigaction(SIGCHLD, NULL, &sa) < 0) { + pa_log_debug("sigaction() failed: %s", pa_cstrerror(errno)); + pa_context_fail(c, PA_ERR_INTERNAL); + goto fail; + } + +#ifdef SA_NOCLDWAIT + if ((sa.sa_flags & SA_NOCLDWAIT) || sa.sa_handler == SIG_IGN) { +#else + if (sa.sa_handler == SIG_IGN) { +#endif + pa_log_debug("Process disabled waitpid(), cannot autospawn."); + pa_context_fail(c, PA_ERR_CONNECTIONREFUSED); + goto fail; + } + + pa_log_debug("Trying to autospawn..."); + + if (c->spawn_api.prefork) + c->spawn_api.prefork(); + + if ((pid = fork()) < 0) { + pa_log_error(_("fork(): %s"), pa_cstrerror(errno)); + pa_context_fail(c, PA_ERR_INTERNAL); + + if (c->spawn_api.postfork) + c->spawn_api.postfork(); + + goto fail; + } else if (!pid) { + /* Child */ + + const char *state = NULL; + const char * argv[32]; + unsigned n = 0; + + if (c->spawn_api.atfork) + c->spawn_api.atfork(); + + /* We leave most of the cleaning up of the process environment + * to the executable. We only clean up the file descriptors to + * make sure the executable can actually be loaded + * correctly. */ + pa_close_all(-1); + + /* Setup argv */ + argv[n++] = c->conf->daemon_binary; + argv[n++] = "--start"; + + while (n < PA_ELEMENTSOF(argv)-1) { + char *a; + + if (!(a = pa_split_spaces(c->conf->extra_arguments, &state))) + break; + + argv[n++] = a; + } + + argv[n++] = NULL; + pa_assert(n <= PA_ELEMENTSOF(argv)); + + execv(argv[0], (char * const *) argv); + _exit(1); + } + + /* Parent */ + + if (c->spawn_api.postfork) + c->spawn_api.postfork(); + + do { + r = waitpid(pid, &status, 0); + } while (r < 0 && errno == EINTR); + + if (r < 0) { + + if (errno != ECHILD) { + pa_log(_("waitpid(): %s"), pa_cstrerror(errno)); + pa_context_fail(c, PA_ERR_INTERNAL); + goto fail; + } + + /* hmm, something already reaped our child, so we assume + * startup worked, even if we cannot know */ + + } else if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) { + pa_context_fail(c, PA_ERR_CONNECTIONREFUSED); + goto fail; + } + + pa_context_unref(c); + + return 0; + +fail: + + pa_context_unref(c); + + return -1; +} + +#endif /* OS_IS_WIN32 */ + +static void on_connection(pa_socket_client *client, pa_iochannel*io, void *userdata); + +#ifdef HAVE_DBUS +static void track_pulseaudio_on_dbus(pa_context *c, DBusBusType type, pa_dbus_wrap_connection **conn) { + DBusError error; + + pa_assert(c); + pa_assert(conn); + + dbus_error_init(&error); + + if (!(*conn = pa_dbus_wrap_connection_new(c->mainloop, c->use_rtclock, type, &error)) || dbus_error_is_set(&error)) { + pa_log_warn("Unable to contact DBUS: %s: %s", error.name, error.message); + goto fail; + } + + if (!dbus_connection_add_filter(pa_dbus_wrap_connection_get(*conn), filter_cb, c, NULL)) { + pa_log_warn("Failed to add filter function"); + goto fail; + } + c->filter_added = true; + + if (pa_dbus_add_matches( + pa_dbus_wrap_connection_get(*conn), &error, + "type='signal',sender='" DBUS_SERVICE_DBUS "',interface='" DBUS_INTERFACE_DBUS "',member='NameOwnerChanged',arg0='org.pulseaudio.Server',arg1=''", NULL) < 0) { + + pa_log_warn("Unable to track org.pulseaudio.Server: %s: %s", error.name, error.message); + goto fail; + } + + return; + +fail: + if (*conn) { + pa_dbus_wrap_connection_free(*conn); + *conn = NULL; + } + + dbus_error_free(&error); +} +#endif + +static int try_next_connection(pa_context *c) { + char *u = NULL; + int r = -1; + + pa_assert(c); + pa_assert(!c->client); + + for (;;) { + pa_xfree(u); + u = NULL; + + c->server_list = pa_strlist_pop(c->server_list, &u); + + if (!u) { + +#ifndef OS_IS_WIN32 + if (c->do_autospawn) { + + if ((r = context_autospawn(c)) < 0) + goto finish; + + /* Autospawn only once */ + c->do_autospawn = false; + + /* Connect only to per-user sockets this time */ + c->server_list = prepend_per_user(c->server_list); + + /* Retry connection */ + continue; + } +#endif + +#ifdef HAVE_DBUS + if (c->no_fail && !c->server_specified) { + if (!c->session_bus) + track_pulseaudio_on_dbus(c, DBUS_BUS_SESSION, &c->session_bus); + if (!c->system_bus) + track_pulseaudio_on_dbus(c, DBUS_BUS_SYSTEM, &c->system_bus); + + if (c->session_bus || c->system_bus) { + pa_log_debug("Waiting for PA on D-Bus..."); + break; + } + } else +#endif + pa_context_fail(c, PA_ERR_CONNECTIONREFUSED); + + goto finish; + } + + pa_log_debug("Trying to connect to %s...", u); + + pa_xfree(c->server); + c->server = pa_xstrdup(u); + + if (!(c->client = pa_socket_client_new_string(c->mainloop, c->use_rtclock, u, PA_NATIVE_DEFAULT_PORT))) + continue; + + c->is_local = pa_socket_client_is_local(c->client); + pa_socket_client_set_callback(c->client, on_connection, c); + break; + } + + r = 0; + +finish: + pa_xfree(u); + + return r; +} + +static void on_connection(pa_socket_client *client, pa_iochannel*io, void *userdata) { + pa_context *c = userdata; + int saved_errno = errno; + + pa_assert(client); + pa_assert(c); + pa_assert(c->state == PA_CONTEXT_CONNECTING); + + pa_context_ref(c); + + pa_socket_client_unref(client); + c->client = NULL; + + if (!io) { + /* Try the next item in the list */ + if (saved_errno == ECONNREFUSED || + saved_errno == ETIMEDOUT || + saved_errno == EHOSTUNREACH) { + try_next_connection(c); + goto finish; + } + + pa_context_fail(c, PA_ERR_CONNECTIONREFUSED); + goto finish; + } + + setup_context(c, io); + +finish: + pa_context_unref(c); +} + +#ifdef HAVE_DBUS +static DBusHandlerResult filter_cb(DBusConnection *bus, DBusMessage *message, void *userdata) { + pa_context *c = userdata; + bool is_session; + + pa_assert(bus); + pa_assert(message); + pa_assert(c); + + if (c->state != PA_CONTEXT_CONNECTING) + goto finish; + + if (!c->no_fail) + goto finish; + + /* FIXME: We probably should check if this is actually the NameOwnerChanged we were looking for */ + + is_session = c->session_bus && bus == pa_dbus_wrap_connection_get(c->session_bus); + pa_log_debug("Rock!! PulseAudio might be back on %s bus", is_session ? "session" : "system"); + + if (is_session) + /* The user instance via PF_LOCAL */ + c->server_list = prepend_per_user(c->server_list); + else + /* The system wide instance via PF_LOCAL */ + c->server_list = pa_strlist_prepend(c->server_list, PA_SYSTEM_RUNTIME_PATH PA_PATH_SEP PA_NATIVE_DEFAULT_UNIX_SOCKET); + + if (!c->client) + try_next_connection(c); + +finish: + return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; +} +#endif + +int pa_context_connect( + pa_context *c, + const char *server, + pa_context_flags_t flags, + const pa_spawn_api *api) { + + int r = -1; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY(c, c->state == PA_CONTEXT_UNCONNECTED, PA_ERR_BADSTATE); + PA_CHECK_VALIDITY(c, !(flags & ~(PA_CONTEXT_NOAUTOSPAWN|PA_CONTEXT_NOFAIL)), PA_ERR_INVALID); + PA_CHECK_VALIDITY(c, !server || *server, PA_ERR_INVALID); + + if (server) + c->conf->autospawn = false; + else + server = c->conf->default_server; + + pa_context_ref(c); + + c->no_fail = !!(flags & PA_CONTEXT_NOFAIL); + c->server_specified = !!server; + pa_assert(!c->server_list); + + if (server) { + if (!(c->server_list = pa_strlist_parse(server))) { + pa_context_fail(c, PA_ERR_INVALIDSERVER); + goto finish; + } + + } else { + char *d; + + /* Prepend in reverse order */ + + /* Follow the X display */ + if (c->conf->auto_connect_display) { + if ((d = getenv("DISPLAY"))) { + d = pa_xstrndup(d, strcspn(d, ":")); + + if (*d) + c->server_list = pa_strlist_prepend(c->server_list, d); + + pa_xfree(d); + } + } + + /* Add TCP/IP on the localhost */ + if (c->conf->auto_connect_localhost) { + c->server_list = pa_strlist_prepend(c->server_list, "tcp6:[::1]"); + c->server_list = pa_strlist_prepend(c->server_list, "tcp4:127.0.0.1"); + } + + /* The system wide instance via PF_LOCAL */ + c->server_list = pa_strlist_prepend(c->server_list, PA_SYSTEM_RUNTIME_PATH PA_PATH_SEP PA_NATIVE_DEFAULT_UNIX_SOCKET); + + /* The user instance via PF_LOCAL */ + c->server_list = prepend_per_user(c->server_list); + } + + /* Set up autospawning */ + if (!(flags & PA_CONTEXT_NOAUTOSPAWN) && c->conf->autospawn) { + +#ifdef HAVE_GETUID + if (getuid() == 0) + pa_log_debug("Not doing autospawn since we are root."); + else { + c->do_autospawn = true; + + if (api) + c->spawn_api = *api; + } +#endif + } + + pa_context_set_state(c, PA_CONTEXT_CONNECTING); + r = try_next_connection(c); + +finish: + pa_context_unref(c); + + return r; +} + +void pa_context_disconnect(pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (pa_detect_fork()) + return; + + if (PA_CONTEXT_IS_GOOD(c->state)) + pa_context_set_state(c, PA_CONTEXT_TERMINATED); +} + +pa_context_state_t pa_context_get_state(const pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + return c->state; +} + +int pa_context_errno(const pa_context *c) { + + if (!c) + return PA_ERR_INVALID; + + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + return c->error->error; +} + +void pa_context_set_state_callback(pa_context *c, pa_context_notify_cb_t cb, void *userdata) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (pa_detect_fork()) + return; + + if (c->state == PA_CONTEXT_TERMINATED || c->state == PA_CONTEXT_FAILED) + return; + + c->state_callback = cb; + c->state_userdata = userdata; +} + +void pa_context_set_event_callback(pa_context *c, pa_context_event_cb_t cb, void *userdata) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (pa_detect_fork()) + return; + + if (c->state == PA_CONTEXT_TERMINATED || c->state == PA_CONTEXT_FAILED) + return; + + c->event_callback = cb; + c->event_userdata = userdata; +} + +int pa_context_is_pending(const pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY(c, PA_CONTEXT_IS_GOOD(c->state), PA_ERR_BADSTATE); + + return (c->pstream && pa_pstream_is_pending(c->pstream)) || + (c->pdispatch && pa_pdispatch_is_pending(c->pdispatch)) || + c->client; +} + +static void set_dispatch_callbacks(pa_operation *o); + +static void pdispatch_drain_callback(pa_pdispatch*pd, void *userdata) { + set_dispatch_callbacks(userdata); +} + +static void pstream_drain_callback(pa_pstream *s, void *userdata) { + set_dispatch_callbacks(userdata); +} + +static void set_dispatch_callbacks(pa_operation *o) { + int done = 1; + + pa_assert(o); + pa_assert(PA_REFCNT_VALUE(o) >= 1); + pa_assert(o->context); + pa_assert(PA_REFCNT_VALUE(o->context) >= 1); + pa_assert(o->context->state == PA_CONTEXT_READY); + + pa_pstream_set_drain_callback(o->context->pstream, NULL, NULL); + pa_pdispatch_set_drain_callback(o->context->pdispatch, NULL, NULL); + + if (pa_pdispatch_is_pending(o->context->pdispatch)) { + pa_pdispatch_set_drain_callback(o->context->pdispatch, pdispatch_drain_callback, o); + done = 0; + } + + if (pa_pstream_is_pending(o->context->pstream)) { + pa_pstream_set_drain_callback(o->context->pstream, pstream_drain_callback, o); + done = 0; + } + + if (done) { + if (o->callback) { + pa_context_notify_cb_t cb = (pa_context_notify_cb_t) o->callback; + cb(o->context, o->userdata); + } + + pa_operation_done(o); + pa_operation_unref(o); + } +} + +pa_operation* pa_context_drain(pa_context *c, pa_context_notify_cb_t cb, void *userdata) { + pa_operation *o; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + PA_CHECK_VALIDITY_RETURN_NULL(c, pa_context_is_pending(c), PA_ERR_BADSTATE); + + o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata); + set_dispatch_callbacks(pa_operation_ref(o)); + + return o; +} + +void pa_context_simple_ack_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_operation *o = userdata; + int success = 1; + + pa_assert(pd); + pa_assert(o); + pa_assert(PA_REFCNT_VALUE(o) >= 1); + + if (!o->context) + goto finish; + + if (command != PA_COMMAND_REPLY) { + if (pa_context_handle_error(o->context, command, t, false) < 0) + goto finish; + + success = 0; + } else if (!pa_tagstruct_eof(t)) { + pa_context_fail(o->context, PA_ERR_PROTOCOL); + goto finish; + } + + if (o->callback) { + pa_context_success_cb_t cb = (pa_context_success_cb_t) o->callback; + cb(o->context, success, o->userdata); + } + +finish: + pa_operation_done(o); + pa_operation_unref(o); +} + +pa_operation* pa_context_send_simple_command(pa_context *c, uint32_t command, pa_pdispatch_cb_t internal_cb, pa_operation_cb_t cb, void *userdata) { + pa_tagstruct *t; + pa_operation *o; + uint32_t tag; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + + o = pa_operation_new(c, NULL, cb, userdata); + + t = pa_tagstruct_command(c, command, &tag); + pa_pstream_send_tagstruct(c->pstream, t); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, internal_cb, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref); + + return o; +} + +pa_operation* pa_context_exit_daemon(pa_context *c, pa_context_success_cb_t cb, void *userdata) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + return pa_context_send_simple_command(c, PA_COMMAND_EXIT, pa_context_simple_ack_callback, (pa_operation_cb_t) cb, userdata); +} + +pa_operation* pa_context_set_default_sink(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) { + pa_tagstruct *t; + pa_operation *o; + uint32_t tag; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + + o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata); + t = pa_tagstruct_command(c, PA_COMMAND_SET_DEFAULT_SINK, &tag); + pa_tagstruct_puts(t, name); + pa_pstream_send_tagstruct(c->pstream, t); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref); + + return o; +} + +pa_operation* pa_context_set_default_source(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) { + pa_tagstruct *t; + pa_operation *o; + uint32_t tag; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + + o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata); + t = pa_tagstruct_command(c, PA_COMMAND_SET_DEFAULT_SOURCE, &tag); + pa_tagstruct_puts(t, name); + pa_pstream_send_tagstruct(c->pstream, t); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref); + + return o; +} + +int pa_context_is_local(const pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_ANY(c, !pa_detect_fork(), PA_ERR_FORKED, -1); + PA_CHECK_VALIDITY_RETURN_ANY(c, PA_CONTEXT_IS_GOOD(c->state), PA_ERR_BADSTATE, -1); + + return c->is_local; +} + +pa_operation* pa_context_set_name(pa_context *c, const char *name, pa_context_success_cb_t cb, void *userdata) { + pa_operation *o; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + pa_assert(name); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + + if (c->version >= 13) { + pa_proplist *p = pa_proplist_new(); + + pa_proplist_sets(p, PA_PROP_APPLICATION_NAME, name); + o = pa_context_proplist_update(c, PA_UPDATE_REPLACE, p, cb, userdata); + pa_proplist_free(p); + } else { + pa_tagstruct *t; + uint32_t tag; + + o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata); + t = pa_tagstruct_command(c, PA_COMMAND_SET_CLIENT_NAME, &tag); + pa_tagstruct_puts(t, name); + pa_pstream_send_tagstruct(c->pstream, t); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref); + } + + return o; +} + +const char* pa_get_library_version(void) { + return pa_get_headers_version(); +} + +const char* pa_context_get_server(const pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->server, PA_ERR_NOENTITY); + + if (*c->server == '{') { + char *e = strchr(c->server+1, '}'); + return e ? e+1 : c->server; + } + + return c->server; +} + +uint32_t pa_context_get_protocol_version(const pa_context *c) { + return PA_PROTOCOL_VERSION; +} + +uint32_t pa_context_get_server_protocol_version(const pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_ANY(c, !pa_detect_fork(), PA_ERR_FORKED, PA_INVALID_INDEX); + PA_CHECK_VALIDITY_RETURN_ANY(c, PA_CONTEXT_IS_GOOD(c->state), PA_ERR_BADSTATE, PA_INVALID_INDEX); + + return c->version; +} + +pa_tagstruct *pa_tagstruct_command(pa_context *c, uint32_t command, uint32_t *tag) { + pa_tagstruct *t; + + pa_assert(c); + pa_assert(tag); + + t = pa_tagstruct_new(); + pa_tagstruct_putu32(t, command); + pa_tagstruct_putu32(t, *tag = c->ctag++); + + return t; +} + +uint32_t pa_context_get_index(const pa_context *c) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_ANY(c, !pa_detect_fork(), PA_ERR_FORKED, PA_INVALID_INDEX); + PA_CHECK_VALIDITY_RETURN_ANY(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE, PA_INVALID_INDEX); + PA_CHECK_VALIDITY_RETURN_ANY(c, c->version >= 13, PA_ERR_NOTSUPPORTED, PA_INVALID_INDEX); + + return c->client_index; +} + +pa_operation *pa_context_proplist_update(pa_context *c, pa_update_mode_t mode, const pa_proplist *p, pa_context_success_cb_t cb, void *userdata) { + pa_operation *o; + pa_tagstruct *t; + uint32_t tag; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, mode == PA_UPDATE_SET || mode == PA_UPDATE_MERGE || mode == PA_UPDATE_REPLACE, PA_ERR_INVALID); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 13, PA_ERR_NOTSUPPORTED); + + o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata); + + t = pa_tagstruct_command(c, PA_COMMAND_UPDATE_CLIENT_PROPLIST, &tag); + pa_tagstruct_putu32(t, (uint32_t) mode); + pa_tagstruct_put_proplist(t, p); + + pa_pstream_send_tagstruct(c->pstream, t); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref); + + /* Please note that we don't update c->proplist here, because we + * don't export that field */ + + return o; +} + +pa_operation *pa_context_proplist_remove(pa_context *c, const char *const keys[], pa_context_success_cb_t cb, void *userdata) { + pa_operation *o; + pa_tagstruct *t; + uint32_t tag; + const char * const *k; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_NULL(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY_RETURN_NULL(c, keys && keys[0], PA_ERR_INVALID); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->state == PA_CONTEXT_READY, PA_ERR_BADSTATE); + PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 13, PA_ERR_NOTSUPPORTED); + + o = pa_operation_new(c, NULL, (pa_operation_cb_t) cb, userdata); + + t = pa_tagstruct_command(c, PA_COMMAND_REMOVE_CLIENT_PROPLIST, &tag); + + for (k = keys; *k; k++) + pa_tagstruct_puts(t, *k); + + pa_tagstruct_puts(t, NULL); + + pa_pstream_send_tagstruct(c->pstream, t); + pa_pdispatch_register_reply(c->pdispatch, tag, DEFAULT_TIMEOUT, pa_context_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref); + + /* Please note that we don't update c->proplist here, because we + * don't export that field */ + + return o; +} + +void pa_command_extension(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + uint32_t idx; + const char *name; + + pa_assert(pd); + pa_assert(command == PA_COMMAND_EXTENSION); + pa_assert(t); + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + pa_context_ref(c); + + if (c->version < 15) { + pa_context_fail(c, PA_ERR_PROTOCOL); + goto finish; + } + + if (pa_tagstruct_getu32(t, &idx) < 0 || + pa_tagstruct_gets(t, &name) < 0) { + pa_context_fail(c, PA_ERR_PROTOCOL); + goto finish; + } + + if (pa_streq(name, "module-device-manager")) + pa_ext_device_manager_command(c, tag, t); + else if (pa_streq(name, "module-device-restore")) + pa_ext_device_restore_command(c, tag, t); + else if (pa_streq(name, "module-stream-restore")) + pa_ext_stream_restore_command(c, tag, t); + else + pa_log(_("Received message for unknown extension '%s'"), name); + +finish: + pa_context_unref(c); +} + +static void pa_command_enable_srbchannel(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + +#ifdef HAVE_CREDS + pa_cmsg_ancil_data *ancil = NULL; + + pa_assert(pd); + pa_assert(command == PA_COMMAND_ENABLE_SRBCHANNEL); + pa_assert(t); + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + ancil = pa_pdispatch_take_ancil_data(pd); + if (!ancil) + goto fail; + + /* Currently only one srb channel is supported, might change in future versions */ + if (c->srb_template.readfd != -1) + goto fail; + + if (ancil->nfd != 2 || ancil->fds[0] == -1 || ancil->fds[1] == -1) + goto fail; + + pa_context_ref(c); + + c->srb_template.readfd = ancil->fds[0]; + c->srb_template.writefd = ancil->fds[1]; + c->srb_setup_tag = tag; + + pa_context_unref(c); + + ancil->close_fds_on_cleanup = false; + return; + +fail: + if (ancil) + pa_cmsg_ancil_data_close_fds(ancil); + + pa_context_fail(c, PA_ERR_PROTOCOL); + return; +#else + pa_assert(c); + pa_context_fail(c, PA_ERR_PROTOCOL); +#endif +} + +static void pa_command_disable_srbchannel(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + pa_tagstruct *t2; + + pa_assert(pd); + pa_assert(command == PA_COMMAND_DISABLE_SRBCHANNEL); + pa_assert(t); + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + pa_pstream_set_srbchannel(c->pstream, NULL); + + c->srb_template.readfd = -1; + c->srb_template.writefd = -1; + if (c->srb_template.memblock) { + pa_memblock_unref(c->srb_template.memblock); + c->srb_template.memblock = NULL; + } + + /* Send disable command back again */ + t2 = pa_tagstruct_new(); + pa_tagstruct_putu32(t2, PA_COMMAND_DISABLE_SRBCHANNEL); + pa_tagstruct_putu32(t2, tag); + pa_pstream_send_tagstruct(c->pstream, t2); +} + +static void pa_command_register_memfd_shmid(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + + pa_assert(pd); + pa_assert(command == PA_COMMAND_REGISTER_MEMFD_SHMID); + pa_assert(t); + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + if (pa_common_command_register_memfd_shmid(c->pstream, pd, c->version, command, t)) + pa_context_fail(c, PA_ERR_PROTOCOL); +} + +void pa_command_client_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + pa_proplist *pl = NULL; + const char *event; + + pa_assert(pd); + pa_assert(command == PA_COMMAND_CLIENT_EVENT); + pa_assert(t); + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + pa_context_ref(c); + + if (c->version < 15) { + pa_context_fail(c, PA_ERR_PROTOCOL); + goto finish; + } + + pl = pa_proplist_new(); + + if (pa_tagstruct_gets(t, &event) < 0 || + pa_tagstruct_get_proplist(t, pl) < 0 || + !pa_tagstruct_eof(t) || !event) { + pa_context_fail(c, PA_ERR_PROTOCOL); + goto finish; + } + + if (c->event_callback) + c->event_callback(c, event, pl, c->event_userdata); + +finish: + pa_context_unref(c); + + if (pl) + pa_proplist_free(pl); +} + +pa_time_event* pa_context_rttime_new(const pa_context *c, pa_usec_t usec, pa_time_event_cb_t cb, void *userdata) { + struct timeval tv; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + pa_assert(c->mainloop); + + if (usec == PA_USEC_INVALID) + return c->mainloop->time_new(c->mainloop, NULL, cb, userdata); + + pa_timeval_rtstore(&tv, usec, c->use_rtclock); + + return c->mainloop->time_new(c->mainloop, &tv, cb, userdata); +} + +void pa_context_rttime_restart(const pa_context *c, pa_time_event *e, pa_usec_t usec) { + struct timeval tv; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + pa_assert(c->mainloop); + + if (usec == PA_USEC_INVALID) + c->mainloop->time_restart(e, NULL); + else { + pa_timeval_rtstore(&tv, usec, c->use_rtclock); + c->mainloop->time_restart(e, &tv); + } +} + +size_t pa_context_get_tile_size(const pa_context *c, const pa_sample_spec *ss) { + size_t fs, mbs; + + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY_RETURN_ANY(c, !pa_detect_fork(), PA_ERR_FORKED, (size_t) -1); + PA_CHECK_VALIDITY_RETURN_ANY(c, !ss || pa_sample_spec_valid(ss), PA_ERR_INVALID, (size_t) -1); + + fs = ss ? pa_frame_size(ss) : 1; + mbs = PA_ROUND_DOWN(pa_mempool_block_size_max(c->mempool), fs); + return PA_MAX(mbs, fs); +} + +int pa_context_load_cookie_from_file(pa_context *c, const char *cookie_file_path) { + pa_assert(c); + pa_assert(PA_REFCNT_VALUE(c) >= 1); + + PA_CHECK_VALIDITY(c, !pa_detect_fork(), PA_ERR_FORKED); + PA_CHECK_VALIDITY(c, c->state == PA_CONTEXT_UNCONNECTED, PA_ERR_BADSTATE); + PA_CHECK_VALIDITY(c, !cookie_file_path || *cookie_file_path, PA_ERR_INVALID); + + pa_client_conf_set_cookie_file_from_application(c->conf, cookie_file_path); + + return 0; +} |