mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
synced 2024-09-20 00:11:31 +00:00
593 lines
15 KiB
C
593 lines
15 KiB
C
/* PipeWire
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*
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* Copyright © 2018 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <dbus/dbus.h>
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#include <spa/utils/result.h>
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#include <spa/utils/type.h>
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#include <spa/utils/names.h>
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#include <spa/utils/string.h>
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#include <spa/support/log.h>
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#include <spa/support/plugin.h>
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#include <spa/support/dbus.h>
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static struct spa_log_topic log_topic = SPA_LOG_TOPIC(0, "spa.dbus");
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#undef SPA_LOG_TOPIC_DEFAULT
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#define SPA_LOG_TOPIC_DEFAULT &log_topic
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struct impl {
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struct spa_handle handle;
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struct spa_dbus dbus;
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struct spa_log *log;
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struct spa_loop_utils *utils;
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struct spa_list connection_list;
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};
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struct source_data {
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struct spa_list link;
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struct spa_source *source;
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struct connection *conn;
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};
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#define connection_emit(c,m,v,...) spa_hook_list_call(&c->listener_list, struct spa_dbus_connection_events, m, v, ##__VA_ARGS__)
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#define connection_emit_destroy(c) connection_emit(c, destroy, 0)
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#define connection_emit_disconnected(c) connection_emit(c, disconnected, 0)
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struct connection {
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struct spa_list link;
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struct spa_dbus_connection this;
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struct impl *impl;
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enum spa_dbus_type type;
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DBusConnection *conn;
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struct spa_source *dispatch_event;
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struct spa_list source_list;
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struct spa_hook_list listener_list;
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};
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static void source_data_free(void *data)
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{
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struct source_data *d = data;
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struct connection *conn = d->conn;
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struct impl *impl = conn->impl;
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spa_list_remove(&d->link);
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spa_loop_utils_destroy_source(impl->utils, d->source);
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free(d);
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}
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static void dispatch_cb(void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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if (dbus_connection_dispatch(conn->conn) == DBUS_DISPATCH_COMPLETE)
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spa_loop_utils_enable_idle(impl->utils, conn->dispatch_event, false);
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}
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static void dispatch_status(DBusConnection *conn, DBusDispatchStatus status, void *userdata)
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{
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struct connection *c = userdata;
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struct impl *impl = c->impl;
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spa_loop_utils_enable_idle(impl->utils, c->dispatch_event,
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status == DBUS_DISPATCH_COMPLETE ? false : true);
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}
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static inline uint32_t dbus_to_io(DBusWatch *watch)
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{
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uint32_t mask;
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unsigned int flags;
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/* no watch flags for disabled watches */
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if (!dbus_watch_get_enabled(watch))
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return 0;
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flags = dbus_watch_get_flags(watch);
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mask = SPA_IO_HUP | SPA_IO_ERR;
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if (flags & DBUS_WATCH_READABLE)
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mask |= SPA_IO_IN;
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if (flags & DBUS_WATCH_WRITABLE)
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mask |= SPA_IO_OUT;
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return mask;
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}
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static inline unsigned int io_to_dbus(uint32_t mask)
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{
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unsigned int flags = 0;
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if (mask & SPA_IO_IN)
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flags |= DBUS_WATCH_READABLE;
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if (mask & SPA_IO_OUT)
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flags |= DBUS_WATCH_WRITABLE;
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if (mask & SPA_IO_HUP)
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flags |= DBUS_WATCH_HANGUP;
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if (mask & SPA_IO_ERR)
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flags |= DBUS_WATCH_ERROR;
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return flags;
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}
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static void
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handle_io_event(void *userdata, int fd, uint32_t mask)
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{
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DBusWatch *watch = userdata;
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if (!dbus_watch_get_enabled(watch)) {
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fprintf(stderr, "Asked to handle disabled watch: %p %i", (void *) watch, fd);
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return;
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}
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dbus_watch_handle(watch, io_to_dbus(mask));
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}
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static dbus_bool_t add_watch(DBusWatch *watch, void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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struct source_data *data;
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spa_log_debug(impl->log, "add watch %p %d", watch, dbus_watch_get_unix_fd(watch));
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data = calloc(1, sizeof(struct source_data));
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data->conn = conn;
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/* we dup because dbus tends to add the same fd multiple times and our epoll
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* implementation does not like that */
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data->source = spa_loop_utils_add_io(impl->utils,
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dup(dbus_watch_get_unix_fd(watch)),
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dbus_to_io(watch), true, handle_io_event, watch);
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spa_list_append(&conn->source_list, &data->link);
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dbus_watch_set_data(watch, data, source_data_free);
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return TRUE;
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}
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static void remove_watch(DBusWatch *watch, void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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spa_log_debug(impl->log, "remove watch %p", watch);
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dbus_watch_set_data(watch, NULL, NULL);
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}
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static void toggle_watch(DBusWatch *watch, void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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struct source_data *data;
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spa_log_debug(impl->log, "toggle watch %p", watch);
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if ((data = dbus_watch_get_data(watch)) == NULL)
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return;
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spa_loop_utils_update_io(impl->utils, data->source, dbus_to_io(watch));
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}
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static void
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handle_timer_event(void *userdata, uint64_t expirations)
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{
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DBusTimeout *timeout = userdata;
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uint64_t t;
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struct timespec ts;
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struct source_data *data;
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struct connection *conn;
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struct impl *impl;
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if ((data = dbus_timeout_get_data(timeout)) == NULL)
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return;
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conn = data->conn;
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impl = conn->impl;
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spa_log_debug(impl->log, "timeout %p conn:%p impl:%p", timeout, conn, impl);
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if (dbus_timeout_get_enabled(timeout)) {
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t = dbus_timeout_get_interval(timeout) * SPA_NSEC_PER_MSEC;
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ts.tv_sec = t / SPA_NSEC_PER_SEC;
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ts.tv_nsec = t % SPA_NSEC_PER_SEC;
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spa_loop_utils_update_timer(impl->utils,
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data->source, &ts, NULL, false);
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dbus_timeout_handle(timeout);
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}
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}
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static dbus_bool_t add_timeout(DBusTimeout *timeout, void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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struct timespec ts;
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struct source_data *data;
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uint64_t t;
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if (!dbus_timeout_get_enabled(timeout))
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return FALSE;
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spa_log_debug(impl->log, "add timeout %p conn:%p impl:%p", timeout, conn, impl);
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data = calloc(1, sizeof(struct source_data));
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data->conn = conn;
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data->source = spa_loop_utils_add_timer(impl->utils, handle_timer_event, timeout);
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spa_list_append(&conn->source_list, &data->link);
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dbus_timeout_set_data(timeout, data, source_data_free);
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t = dbus_timeout_get_interval(timeout) * SPA_NSEC_PER_MSEC;
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ts.tv_sec = t / SPA_NSEC_PER_SEC;
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ts.tv_nsec = t % SPA_NSEC_PER_SEC;
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spa_loop_utils_update_timer(impl->utils, data->source, &ts, NULL, false);
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return TRUE;
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}
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static void remove_timeout(DBusTimeout *timeout, void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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spa_log_debug(impl->log, "remove timeout %p conn:%p impl:%p", timeout, conn, impl);
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dbus_timeout_set_data(timeout, NULL, NULL);
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}
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static void toggle_timeout(DBusTimeout *timeout, void *userdata)
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{
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struct connection *conn = userdata;
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struct impl *impl = conn->impl;
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struct source_data *data;
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struct timespec ts, *tsp;
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if ((data = dbus_timeout_get_data(timeout)) == NULL)
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return;
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spa_log_debug(impl->log, "toggle timeout %p conn:%p impl:%p", timeout, conn, impl);
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if (dbus_timeout_get_enabled(timeout)) {
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uint64_t t = dbus_timeout_get_interval(timeout) * SPA_NSEC_PER_MSEC;
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ts.tv_sec = t / SPA_NSEC_PER_SEC;
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ts.tv_nsec = t % SPA_NSEC_PER_SEC;
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tsp = &ts;
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} else {
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tsp = NULL;
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}
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spa_loop_utils_update_timer(impl->utils, data->source, tsp, NULL, false);
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}
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static void wakeup_main(void *userdata)
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{
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struct connection *this = userdata;
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struct impl *impl = this->impl;
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spa_loop_utils_enable_idle(impl->utils, this->dispatch_event, true);
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}
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static void connection_close(struct connection *this);
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static DBusHandlerResult filter_message (DBusConnection *connection,
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DBusMessage *message, void *user_data)
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{
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struct connection *this = user_data;
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struct impl *impl = this->impl;
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if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
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spa_log_debug(impl->log, "dbus connection %p disconnected", this);
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connection_close(this);
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connection_emit_disconnected(this);
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}
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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static const char *type_to_string(enum spa_dbus_type type) {
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switch (type) {
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case SPA_DBUS_TYPE_SESSION: return "session";
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case SPA_DBUS_TYPE_SYSTEM: return "system";
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case SPA_DBUS_TYPE_STARTER: return "starter";
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default: return "unknown";
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}
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}
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static void *
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impl_connection_get(struct spa_dbus_connection *conn)
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{
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struct connection *this = SPA_CONTAINER_OF(conn, struct connection, this);
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struct impl *impl = this->impl;
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DBusError error;
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if (this->conn != NULL)
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return this->conn;
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dbus_error_init(&error);
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this->conn = dbus_bus_get_private((DBusBusType)this->type, &error);
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if (this->conn == NULL)
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goto error;
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dbus_connection_set_exit_on_disconnect(this->conn, false);
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if (!dbus_connection_add_filter(this->conn, filter_message, this, NULL))
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goto error_filter;
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dbus_connection_set_dispatch_status_function(this->conn, dispatch_status, this, NULL);
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dbus_connection_set_watch_functions(this->conn, add_watch, remove_watch, toggle_watch, this,
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NULL);
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dbus_connection_set_timeout_functions(this->conn, add_timeout, remove_timeout,
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toggle_timeout, this, NULL);
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dbus_connection_set_wakeup_main_function(this->conn, wakeup_main, this, NULL);
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return this->conn;
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error:
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spa_log_error(impl->log, "Failed to connect to %s bus: %s", type_to_string(this->type), error.message);
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dbus_error_free(&error);
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errno = ECONNREFUSED;
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return NULL;
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error_filter:
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spa_log_error(impl->log, "Failed to create filter");
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dbus_connection_close(this->conn);
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dbus_connection_unref(this->conn);
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this->conn = NULL;
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errno = ENOMEM;
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return NULL;
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}
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static void connection_close(struct connection *this)
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{
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if (this->conn) {
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dbus_connection_remove_filter(this->conn, filter_message, this);
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dbus_connection_close(this->conn);
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/* Someone may still hold a ref to the handle from get(), so the
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* unref below may not be the final one. For that case, reset
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* all callbacks we defined to be sure they are not called. */
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dbus_connection_set_dispatch_status_function(this->conn, NULL, NULL, NULL);
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dbus_connection_set_watch_functions(this->conn, NULL, NULL, NULL, NULL, NULL);
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dbus_connection_set_timeout_functions(this->conn, NULL, NULL, NULL, NULL, NULL);
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dbus_connection_set_wakeup_main_function(this->conn, NULL, NULL, NULL);
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dbus_connection_unref(this->conn);
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}
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this->conn = NULL;
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}
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static void connection_free(struct connection *conn)
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{
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struct impl *impl = conn->impl;
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struct source_data *data;
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spa_list_remove(&conn->link);
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connection_close(conn);
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spa_list_consume(data, &conn->source_list, link)
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source_data_free(data);
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spa_loop_utils_destroy_source(impl->utils, conn->dispatch_event);
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spa_hook_list_clean(&conn->listener_list);
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free(conn);
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}
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static void
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impl_connection_destroy(struct spa_dbus_connection *conn)
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{
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struct connection *this = SPA_CONTAINER_OF(conn, struct connection, this);
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struct impl *impl = this->impl;
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connection_emit_destroy(this);
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spa_log_debug(impl->log, "destroy conn %p", this);
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connection_free(this);
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}
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static void
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impl_connection_add_listener(struct spa_dbus_connection *conn,
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struct spa_hook *listener,
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const struct spa_dbus_connection_events *events,
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void *data)
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{
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struct connection *this = SPA_CONTAINER_OF(conn, struct connection, this);
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spa_hook_list_append(&this->listener_list, listener, events, data);
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}
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static const struct spa_dbus_connection impl_connection = {
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SPA_VERSION_DBUS_CONNECTION,
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impl_connection_get,
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impl_connection_destroy,
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impl_connection_add_listener,
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};
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static struct spa_dbus_connection *
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impl_get_connection(void *object,
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enum spa_dbus_type type)
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{
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struct impl *impl = object;
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struct connection *conn;
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int res;
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conn = calloc(1, sizeof(struct connection));
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conn->this = impl_connection;
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conn->impl = impl;
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conn->type = type;
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conn->dispatch_event = spa_loop_utils_add_idle(impl->utils,
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false, dispatch_cb, conn);
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if (conn->dispatch_event == NULL)
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goto no_event;
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spa_list_init(&conn->source_list);
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spa_hook_list_init(&conn->listener_list);
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spa_list_append(&impl->connection_list, &conn->link);
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spa_log_debug(impl->log, "new conn %p", conn);
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return &conn->this;
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no_event:
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res = -errno;
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spa_log_error(impl->log, "Failed to create idle event: %m");
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free(conn);
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errno = -res;
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return NULL;
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}
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static const struct spa_dbus_methods impl_dbus = {
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SPA_VERSION_DBUS_METHODS,
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.get_connection = impl_get_connection,
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};
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static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
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{
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struct impl *this;
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spa_return_val_if_fail(handle != NULL, -EINVAL);
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spa_return_val_if_fail(interface != NULL, -EINVAL);
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this = (struct impl *) handle;
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if (spa_streq(type, SPA_TYPE_INTERFACE_DBus))
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*interface = &this->dbus;
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else
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return -ENOENT;
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return 0;
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}
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static int impl_clear(struct spa_handle *handle)
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{
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struct impl *impl = (struct impl *) handle;
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struct connection *conn;
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spa_return_val_if_fail(handle != NULL, -EINVAL);
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spa_list_consume(conn, &impl->connection_list, link)
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connection_free(conn);
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return 0;
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}
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static size_t
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impl_get_size(const struct spa_handle_factory *factory,
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const struct spa_dict *params)
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{
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return sizeof(struct impl);
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}
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static int
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impl_init(const struct spa_handle_factory *factory,
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struct spa_handle *handle,
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const struct spa_dict *info,
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const struct spa_support *support,
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uint32_t n_support)
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{
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struct impl *this;
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|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(handle != NULL, -EINVAL);
|
|
|
|
handle->get_interface = impl_get_interface;
|
|
handle->clear = impl_clear;
|
|
|
|
this = (struct impl *) handle;
|
|
spa_list_init(&this->connection_list);
|
|
|
|
this->dbus.iface = SPA_INTERFACE_INIT(
|
|
SPA_TYPE_INTERFACE_DBus,
|
|
SPA_VERSION_DBUS,
|
|
&impl_dbus, this);
|
|
|
|
this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
|
|
spa_log_topic_init(this->log, &log_topic);
|
|
|
|
this->utils = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_LoopUtils);
|
|
|
|
if (this->utils == NULL) {
|
|
spa_log_error(this->log, "a LoopUtils is needed");
|
|
return -EINVAL;
|
|
}
|
|
|
|
spa_log_debug(this->log, "%p: initialized", this);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct spa_interface_info impl_interfaces[] = {
|
|
{SPA_TYPE_INTERFACE_DBus,},
|
|
};
|
|
|
|
static int
|
|
impl_enum_interface_info(const struct spa_handle_factory *factory,
|
|
const struct spa_interface_info **info,
|
|
uint32_t *index)
|
|
{
|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(info != NULL, -EINVAL);
|
|
spa_return_val_if_fail(index != NULL, -EINVAL);
|
|
|
|
switch (*index) {
|
|
case 0:
|
|
*info = &impl_interfaces[*index];
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
(*index)++;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static const struct spa_handle_factory dbus_factory = {
|
|
SPA_VERSION_HANDLE_FACTORY,
|
|
SPA_NAME_SUPPORT_DBUS,
|
|
NULL,
|
|
impl_get_size,
|
|
impl_init,
|
|
impl_enum_interface_info,
|
|
};
|
|
|
|
SPA_EXPORT
|
|
int spa_handle_factory_enum(const struct spa_handle_factory **factory, uint32_t *index)
|
|
{
|
|
spa_return_val_if_fail(factory != NULL, -EINVAL);
|
|
spa_return_val_if_fail(index != NULL, -EINVAL);
|
|
|
|
switch (*index) {
|
|
case 0:
|
|
*factory = &dbus_factory;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
(*index)++;
|
|
return 1;
|
|
}
|