/***
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;
const char *force_disable_shm_str;
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);
force_disable_shm_str = pa_proplist_gets(c->proplist, PA_PROP_CONTEXT_FORCE_DISABLE_SHM);
if (force_disable_shm_str) {
int b = pa_parse_boolean(force_disable_shm_str);
if (b < 0) {
pa_log_warn("Ignored invalid value for '%s' property: %s", PA_PROP_CONTEXT_FORCE_DISABLE_SHM, force_disable_shm_str);
} else if (b) {
c->conf->disable_shm = 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) {
#if defined(HAVE_IPV6) && !defined(OS_IS_WIN32)
/* FIXME: pa_socket_client does not support IPv6 on Windows */
c->server_list = pa_strlist_prepend(c->server_list, "tcp6:[::1]");
#endif
c->server_list = pa_strlist_prepend(c->server_list, "tcp4:127.0.0.1");
}
/* The system wide instance via PF_LOCAL */
#ifndef OS_IS_WIN32
c->server_list = pa_strlist_prepend(c->server_list, PA_SYSTEM_RUNTIME_PATH PA_PATH_SEP PA_NATIVE_DEFAULT_UNIX_SOCKET);
#else
/* see change_user in src/daemon/main.c */
char *run_path = pa_sprintf_malloc("%s" PA_PATH_SEP "run" PA_PATH_SEP PA_NATIVE_DEFAULT_UNIX_SOCKET, pa_win32_get_system_appdata());
c->server_list = pa_strlist_prepend(c->server_list, run_path);
pa_xfree(run_path);
#endif
/* 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 (!c->conf->allow_autospawn_for_root && 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;
}
Radix cross Linux
The main Radix cross Linux repository contains the build scripts of packages, which have the most complete and common functionality for desktop machines
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