This patch adds sco lib which gives means to create SCO object with
API to create listening socket, connect and disconnect.
This is going to be common code for HFP HF and HFP GW.
For now we support only one SCO at the time.
Before creating listening SCO socket, remember to register confirm
and connect callbacks. Those are called on incoming connection.
Sco lib is not aware about voice settings. Those must be provided
on bt_sco_connect or in confirm callback.
This patch also adds this lib to Android build.
---
android/Android.mk | 1 +
android/Makefile.am | 1 +
android/sco.c | 307 ++++++++++++++++++++++++++++++++++++++++++++++++++++
android/sco.h | 52 +++++++++
4 files changed, 361 insertions(+)
create mode 100644 android/sco.c
create mode 100644 android/sco.h
diff --git a/android/Android.mk b/android/Android.mk
index aefe41c..dbbcdb2 100644
--- a/android/Android.mk
+++ b/android/Android.mk
@@ -56,6 +56,7 @@ LOCAL_SRC_FILES := \
bluez/android/handsfree-client.c \
bluez/android/gatt.c \
bluez/android/health.c \
+ bluez/android/sco.c \
bluez/profiles/health/mcap.c \
bluez/android/map-client.c \
bluez/src/log.c \
diff --git a/android/Makefile.am b/android/Makefile.am
index 496fbc4..4edb007 100644
--- a/android/Makefile.am
+++ b/android/Makefile.am
@@ -40,6 +40,7 @@ android_bluetoothd_SOURCES = android/main.c \
android/avrcp.h android/avrcp.c \
android/avrcp-lib.h android/avrcp-lib.c \
android/socket.h android/socket.c \
+ android/sco.h android/sco.c \
android/pan.h android/pan.c \
android/handsfree.h android/handsfree.c \
android/handsfree-client.c android/handsfree-client.h \
diff --git a/android/sco.c b/android/sco.c
new file mode 100644
index 0000000..ebb81ad
--- /dev/null
+++ b/android/sco.c
@@ -0,0 +1,307 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2014 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#include <glib.h>
+
+#include "lib/bluetooth.h"
+#include "btio/btio.h"
+#include "src/log.h"
+
+#include "sco.h"
+
+struct bt_sco {
+ int ref_count;
+
+ GIOChannel *server_io;
+
+ GIOChannel *io;
+ guint watch;
+
+ bdaddr_t local_addr;
+ bdaddr_t remote_addr;
+
+ bt_sco_conn_confirm_cb_func_t confirm_cb;
+ bt_sco_conn_cb_func_t connect_cb;
+ bt_sco_disconn_cb_func_t disconnect_cb;
+};
+
+/* We support only one sco for the moment */
+static bool sco_in_use = false;
+
+struct bt_sco *bt_sco_new(const bdaddr_t *addr)
+{
+ struct bt_sco *sco = NULL;
+
+ if (sco_in_use)
+ return NULL;
+
+ sco = g_try_new0(struct bt_sco, 1);
+ if (!sco)
+ return NULL;
+
+ bacpy(&sco->local_addr, addr);
+
+ sco_in_use = true;
+
+ return bt_sco_ref(sco);
+}
+
+struct bt_sco *bt_sco_ref(struct bt_sco *sco)
+{
+ if (!sco)
+ return NULL;
+
+ __sync_fetch_and_add(&sco->ref_count, 1);
+
+ return sco;
+}
+
+static void sco_free(struct bt_sco *sco)
+{
+ if (sco->server_io) {
+ g_io_channel_shutdown(sco->server_io, TRUE, NULL);
+ g_io_channel_unref(sco->server_io);
+ }
+
+ if (sco->io) {
+ g_io_channel_shutdown(sco->io, TRUE, NULL);
+ g_io_channel_unref(sco->io);
+ }
+
+ g_free(sco);
+ sco_in_use = false;
+}
+
+void bt_sco_unref(struct bt_sco *sco)
+{
+ DBG("");
+
+ if (!sco)
+ return;
+
+ if (__sync_sub_and_fetch(&sco->ref_count, 1))
+ return;
+
+ sco_free(sco);
+}
+
+static void clear_remote_address(struct bt_sco *sco)
+{
+ memset(&sco->remote_addr, 0, sizeof(bdaddr_t));
+}
+
+static gboolean disconnect_watch(GIOChannel *chan, GIOCondition cond,
+ gpointer user_data)
+{
+ struct bt_sco *sco = user_data;
+
+ g_io_channel_shutdown(sco->io, TRUE, NULL);
+ g_io_channel_unref(sco->io);
+ sco->io = NULL;
+
+ DBG("");
+
+ sco->watch = 0;
+
+ sco->disconnect_cb(&sco->remote_addr);
+
+ clear_remote_address(sco);
+
+ return FALSE;
+}
+
+static void connect_sco_cb(GIOChannel *chan, GError *err, gpointer user_data)
+{
+ struct bt_sco *sco = user_data;
+
+ DBG("");
+
+ if (err) {
+ error("sco: audio connect failed (%s)", err->message);
+
+ sco->connect_cb(SCO_STATUS_ERROR, &sco->remote_addr);
+
+ clear_remote_address(sco);
+
+ return;
+ }
+
+ g_io_channel_set_close_on_unref(chan, TRUE);
+
+ sco->io = g_io_channel_ref(chan);
+ sco->watch = g_io_add_watch(chan, G_IO_ERR | G_IO_HUP | G_IO_NVAL,
+ disconnect_watch, sco);
+
+ sco->connect_cb(SCO_STATUS_OK, &sco->remote_addr);
+}
+
+static void confirm_sco_cb(GIOChannel *chan, gpointer user_data)
+{
+ char address[18];
+ bdaddr_t bdaddr;
+ GError *err = NULL;
+ struct bt_sco *sco = user_data;
+ uint32_t voice_settings;
+
+ DBG("");
+
+ bt_io_get(chan, &err,
+ BT_IO_OPT_DEST, address,
+ BT_IO_OPT_DEST_BDADDR, &bdaddr,
+ BT_IO_OPT_INVALID);
+ if (err) {
+ error("sco: audio confirm failed (%s)", err->message);
+ g_error_free(err);
+ goto drop;
+ }
+
+ if (!sco->confirm_cb(&bdaddr, &voice_settings)) {
+ error("sco: audio connection from %s rejected", address);
+ goto drop;
+ }
+
+ bacpy(&sco->remote_addr, &bdaddr);
+
+ DBG("incoming SCO connection from %s, voice settings %d", address,
+ voice_settings);
+
+ err = NULL;
+ bt_io_set(chan, &err, BT_IO_OPT_VOICE, voice_settings,
+ BT_IO_OPT_INVALID);
+ if (err) {
+ error("sco: Could not set voice settings (%s)", err->message);
+ g_error_free(err);
+ goto drop;
+ }
+
+ if (!bt_io_accept(chan, connect_sco_cb, sco, NULL, NULL)) {
+ error("sco: failed to accept audio connection");
+ goto drop;
+ }
+
+ return;
+
+drop:
+ g_io_channel_shutdown(chan, TRUE, NULL);
+}
+
+bool bt_sco_listen(struct bt_sco *sco)
+{
+ GError *err = NULL;
+
+ sco->server_io = bt_io_listen(NULL, confirm_sco_cb, sco, NULL, &err,
+ BT_IO_OPT_SOURCE_BDADDR,
+ &sco->local_addr,
+ BT_IO_OPT_INVALID);
+ if (!sco->server_io) {
+ error("sco: Failed to listen on SCO: %s", err->message);
+ g_error_free(err);
+ return false;
+ }
+
+ return true;
+}
+
+bool bt_sco_connect(struct bt_sco *sco, const bdaddr_t *addr,
+ uint16_t voice_settings)
+{
+ GIOChannel *io;
+ GError *gerr = NULL;
+
+ DBG("");
+
+ io = bt_io_connect(connect_sco_cb, sco, NULL, &gerr,
+ BT_IO_OPT_SOURCE_BDADDR, &sco->local_addr,
+ BT_IO_OPT_DEST_BDADDR, addr,
+ BT_IO_OPT_VOICE, voice_settings,
+ BT_IO_OPT_INVALID);
+
+ if (!io) {
+ error("sco: unable to connect audio: %s", gerr->message);
+ g_error_free(gerr);
+ return false;
+ }
+
+ g_io_channel_unref(io);
+
+ bacpy(&sco->remote_addr, addr);
+
+ return true;
+}
+
+void bt_sco_disconnect(struct bt_sco *sco)
+{
+ if (sco->watch) {
+ g_source_remove(sco->watch);
+ sco->watch = 0;
+ }
+
+ g_io_channel_shutdown(sco->io, TRUE, NULL);
+ g_io_channel_unref(sco->io);
+ sco->io = NULL;
+
+ clear_remote_address(sco);
+}
+
+bool bt_sco_get_fd_and_mtu(struct bt_sco *sco, int *fd, uint16_t *mtu)
+{
+ GError *err;
+
+ if (!sco->io || !fd || !mtu)
+ return false;
+
+ err = NULL;
+ if (!bt_io_get(sco->io, &err, BT_IO_OPT_MTU, mtu, BT_IO_OPT_INVALID)) {
+ error("Unable to get MTU: %s\n", err->message);
+ g_clear_error(&err);
+ return false;
+ }
+
+ *fd = g_io_channel_unix_get_fd(sco->io);
+
+ return true;
+}
+
+void bt_sco_set_confirm_cb(struct bt_sco *sco,
+ bt_sco_conn_confirm_cb_func_t func)
+{
+ sco->confirm_cb = func;
+}
+
+void bt_sco_set_connect_cb(struct bt_sco *sco, bt_sco_conn_cb_func_t func)
+{
+ sco->connect_cb = func;
+}
+
+void bt_sco_set_disconnect_cb(struct bt_sco *sco,
+ bt_sco_disconn_cb_func_t func)
+{
+ sco->disconnect_cb = func;
+}
diff --git a/android/sco.h b/android/sco.h
new file mode 100644
index 0000000..491e633
--- /dev/null
+++ b/android/sco.h
@@ -0,0 +1,52 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2014 Intel Corporation. All rights reserved.
+ *
+ *
+ * This library 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.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+enum sco_status {
+ SCO_STATUS_OK,
+ SCO_STATUS_ERROR,
+};
+
+struct bt_sco;
+
+struct bt_sco *bt_sco_new(const bdaddr_t *adapter_addr);
+
+struct bt_sco *bt_sco_ref(struct bt_sco *sco);
+void bt_sco_unref(struct bt_sco *sco);
+
+bool bt_sco_listen(struct bt_sco *sco);
+bool bt_sco_connect(struct bt_sco *sco, const bdaddr_t *remote_addr,
+ uint16_t voice_settings);
+void bt_sco_disconnect(struct bt_sco *sco);
+bool bt_sco_get_fd_and_mtu(struct bt_sco *sco, int *fd, uint16_t *mtu);
+
+typedef bool (*bt_sco_conn_confirm_cb_func_t) (const bdaddr_t *remote_addr,
+ uint32_t *voice_settings);
+typedef void (*bt_sco_conn_cb_func_t) (enum sco_status status,
+ const bdaddr_t *addr);
+typedef void (*bt_sco_disconn_cb_func_t) (const bdaddr_t *addr);
+
+void bt_sco_set_confirm_cb(struct bt_sco *sco,
+ bt_sco_conn_confirm_cb_func_t func);
+void bt_sco_set_connect_cb(struct bt_sco *sco, bt_sco_conn_cb_func_t func);
+void bt_sco_set_disconnect_cb(struct bt_sco *sco,
+ bt_sco_disconn_cb_func_t func);
--
1.8.4
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