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 (!strcmp(name, "module-stream-restore"))
pa_ext_stream_restore_command(c, tag, t);
else if (!strcmp(name, "module-device-manager"))
pa_ext_device_manager_command(c, tag, t);
else
pa_log(_("Received message for unknown extension '%s'"), name);
finish:
pa_context_unref(c);
}
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);
}
static void ext_device_manager_test_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
uint32_t version = PA_INVALID_INDEX;
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;
} else if (pa_tagstruct_getu32(t, &version) < 0 ||
!pa_tagstruct_eof(t)) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
if (o->callback) {
pa_ext_device_manager_test_cb_t cb = (pa_ext_device_manager_test_cb_t) o->callback;
cb(o->context, version, o->userdata);
}
finish:
pa_operation_done(o);
pa_operation_unref(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);
}
static void play_sample_with_proplist_ack_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
uint32_t idx;
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;
idx = PA_INVALID_INDEX;
} else if (pa_tagstruct_getu32(t, &idx) < 0 ||
!pa_tagstruct_eof(t)) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
if (o->callback) {
pa_context_play_sample_cb_t cb = (pa_context_play_sample_cb_t) o->callback;
cb(o->context, idx, o->userdata);
}
finish:
pa_operation_done(o);
pa_operation_unref(o);
}
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 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_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);
}
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 ext_stream_restore_read_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
int eol = 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;
eol = -1;
} else {
while (!pa_tagstruct_eof(t)) {
pa_ext_stream_restore_info i;
pa_bool_t mute = FALSE;
memset(&i, 0, sizeof(i));
if (pa_tagstruct_gets(t, &i.name) < 0 ||
pa_tagstruct_get_channel_map(t, &i.channel_map) < 0 ||
pa_tagstruct_get_cvolume(t, &i.volume) < 0 ||
pa_tagstruct_gets(t, &i.device) < 0 ||
pa_tagstruct_get_boolean(t, &mute) < 0) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
i.mute = (int) mute;
if (o->callback) {
pa_ext_stream_restore_read_cb_t cb = (pa_ext_stream_restore_read_cb_t) o->callback;
cb(o->context, &i, 0, o->userdata);
}
}
}
if (o->callback) {
pa_ext_stream_restore_read_cb_t cb = (pa_ext_stream_restore_read_cb_t) o->callback;
cb(o->context, NULL, eol, o->userdata);
}
finish:
pa_operation_done(o);
pa_operation_unref(o);
}
void pa_ext_device_manager_command(pa_context *c, uint32_t tag, pa_tagstruct *t) {
uint32_t subcommand;
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
pa_assert(t);
if (pa_tagstruct_getu32(t, &subcommand) < 0 ||
!pa_tagstruct_eof(t)) {
pa_context_fail(c, PA_ERR_PROTOCOL);
return;
}
if (subcommand != SUBCOMMAND_EVENT) {
pa_context_fail(c, PA_ERR_PROTOCOL);
return;
}
if (c->ext_device_manager.callback)
c->ext_device_manager.callback(c, c->ext_device_manager.userdata);
}
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
}
int pa_context_handle_error(pa_context *c, uint32_t command, pa_tagstruct *t, pa_bool_t 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 pstream_packet_callback(pa_pstream *p, pa_packet *packet, const pa_creds *creds, 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, creds, c) < 0)
pa_context_fail(c, PA_ERR_PROTOCOL);
pa_context_unref(c);
}
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);
}
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);
} 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 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;
}
if ((sa.sa_flags & SA_NOCLDWAIT) || sa.sa_handler == SIG_IGN) {
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;
}
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;
pa_bool_t 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_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 >= 13) {
shm_on_remote = !!(c->version & 0x80000000U);
/* 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 >= 31)
memfd_on_remote = !!(c->version & 0x40000000U);
/* Reserve the two most-significant _bytes_ of the version tag
* for flags. */
c->version &= 0x0000FFFFU;
}
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 ext_device_restore_read_device_formats_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
int eol = 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;
eol = -1;
} else {
uint8_t j;
while (!pa_tagstruct_eof(t)) {
pa_ext_device_restore_info i;
pa_zero(i);
if (pa_tagstruct_getu32(t, &i.type) < 0 ||
pa_tagstruct_getu32(t, &i.index) < 0 ||
pa_tagstruct_getu8(t, &i.n_formats) < 0) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
if (PA_DEVICE_TYPE_SINK != i.type && PA_DEVICE_TYPE_SOURCE != i.type) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
if (i.index == PA_INVALID_INDEX) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
if (i.n_formats > 0) {
i.formats = pa_xnew0(pa_format_info*, i.n_formats);
for (j = 0; j < i.n_formats; j++) {
pa_format_info *f = i.formats[j] = pa_format_info_new();
if (pa_tagstruct_get_format_info(t, f) < 0) {
uint8_t k;
pa_context_fail(o->context, PA_ERR_PROTOCOL);
for (k = 0; k < j+1; k++)
pa_format_info_free(i.formats[k]);
pa_xfree(i.formats);
goto finish;
}
}
}
if (o->callback) {
pa_ext_device_restore_read_device_formats_cb_t cb = (pa_ext_device_restore_read_device_formats_cb_t) o->callback;
cb(o->context, &i, 0, o->userdata);
}
for (j = 0; j < i.n_formats; j++)
pa_format_info_free(i.formats[j]);
pa_xfree(i.formats);
}
}
static void ext_device_manager_read_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
int eol = 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;
eol = -1;
} else {
while (!pa_tagstruct_eof(t)) {
pa_ext_device_manager_info i;
memset(&i, 0, sizeof(i));
if (pa_tagstruct_gets(t, &i.name) < 0 ||
pa_tagstruct_gets(t, &i.description) < 0 ||
pa_tagstruct_gets(t, &i.icon) < 0 ||
pa_tagstruct_getu32(t, &i.index) < 0 ||
pa_tagstruct_getu32(t, &i.n_role_priorities) < 0) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
if (i.n_role_priorities > 0) {
uint32_t j;
i.role_priorities = pa_xnew0(pa_ext_device_manager_role_priority_info, i.n_role_priorities+1);
for (j = 0; j < i.n_role_priorities; j++) {
if (pa_tagstruct_gets(t, &i.role_priorities[j].role) < 0 ||
pa_tagstruct_getu32(t, &i.role_priorities[j].priority) < 0) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
pa_xfree(i.role_priorities);
goto finish;
}
}
/* Terminate with an extra NULL entry, just to make sure */
i.role_priorities[j].role = NULL;
i.role_priorities[j].priority = 0;
}
if (o->callback) {
pa_ext_device_manager_read_cb_t cb = (pa_ext_device_manager_read_cb_t) o->callback;
cb(o->context, &i, 0, o->userdata);
}
pa_xfree(i.role_priorities);
}
}
if (o->callback) {
pa_ext_device_manager_read_cb_t cb = (pa_ext_device_manager_read_cb_t) o->callback;
cb(o->context, NULL, eol, o->userdata);
}
finish:
pa_operation_done(o);
pa_operation_unref(o);
}
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;
}
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);
}
