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pulseaudio/src/pulse/context.c
Ahmed S. Darwish ee2db62277 pulsecore: Specially mark global mempools 
Color global mempools with a special mark. This special marking
is needed for handling memfd-backed pools.

To avoid fd leaks, memfd pools are registered with the connection
pstream to create an ID<->memfd mapping on both PA endpoints.
Such memory regions are then always referenced by their IDs and
never by their fds, and so their fds can be safely closed later.

Unfortunately this scheme cannot work with global pools since the
registration ID<->memfd mechanism needs to happen for each newly
connected client, and thus the need for a more special handling.
That is, for the pool's fd to be always open :-(

Almost all mempools are now created on a per-client basis. The
only exception is the pa_core's mempool which is still shared
between all clients of the system.

Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
2016-04-02 05:53:33 +02:00

1589 lines
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/***
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 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,
};
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, 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->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 = 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;
type = !c->conf->disable_shm ? PA_MEM_TYPE_SHARED_POSIX : PA_MEM_TYPE_PRIVATE;
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);
}
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(pa_context *c, int error) {
pa_assert(error >= 0);
pa_assert(error < PA_ERR_MAX);
if (c)
c->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, const 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;
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 >= 13) {
shm_on_remote = !!(c->version & 0x80000000U);
c->version &= 0x7FFFFFFFU;
}
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);
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 */
pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION | (c->do_shm ? 0x80000000U : 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 != ESRCH) {
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(pa_context *c) {
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
return c->state;
}
int pa_context_errno(pa_context *c) {
if (!c)
return PA_ERR_INVALID;
pa_assert(PA_REFCNT_VALUE(c) >= 1);
return c->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(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(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(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(pa_context *c) {
return PA_PROTOCOL_VERSION;
}
uint32_t pa_context_get_server_protocol_version(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(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, 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
const int *fds;
int nfd;
pa_assert(pd);
pa_assert(command == PA_COMMAND_ENABLE_SRBCHANNEL);
pa_assert(t);
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
/* Currently only one srb channel is supported, might change in future versions */
if (c->srb_template.readfd != -1) {
pa_context_fail(c, PA_ERR_PROTOCOL);
return;
}
fds = pa_pdispatch_fds(pd, &nfd);
if (nfd != 2 || !fds || fds[0] == -1 || fds[1] == -1) {
pa_context_fail(c, PA_ERR_PROTOCOL);
return;
}
pa_context_ref(c);
c->srb_template.readfd = fds[0];
c->srb_template.writefd = fds[1];
c->srb_setup_tag = tag;
pa_context_unref(c);
#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);
}
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(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(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(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;
}
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