mirror of
https://git.kernel.org/pub/scm/bluetooth/bluez.git
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shared/uhid: Add initial API
This commit is contained in:
Luiz Augusto von Dentz
parent
05da3d5cdf
commit
632617bc86
@ -266,6 +266,14 @@ unit_test_mgmt_SOURCES = unit/test-mgmt.c \
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src/shared/mgmt.h src/shared/mgmt.c
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unit_test_mgmt_LDADD = @GLIB_LIBS@
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unit_tests += unit/test-uhid
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unit_test_uhid_SOURCES = unit/test-uhid.c \
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src/shared/uhid.h src/shared/uhid.c \
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src/shared/io.h src/shared/io-glib.c \
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src/shared/util.h src/shared/util.c
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unit_test_uhid_LDADD = @GLIB_LIBS@
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unit_tests += unit/test-sdp
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unit_test_sdp_SOURCES = unit/test-sdp.c \
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175
src/shared/uhid.c
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175
src/shared/uhid.c
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@ -0,0 +1,175 @@
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/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2014 Intel Corporation. All rights reserved.
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "src/shared/io.h"
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#include "src/shared/util.h"
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#include "src/shared/uhid.h"
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#define UHID_DEVICE_FILE "/dev/uhid"
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struct bt_uhid {
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int ref_count;
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struct io *io;
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};
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static void uhid_free(struct bt_uhid *uhid)
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{
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if (uhid->io)
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io_destroy(uhid->io);
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free(uhid);
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}
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static bool uhid_read_handler(struct io *io, void *user_data)
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{
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int fd;
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ssize_t len;
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struct uhid_event ev;
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fd = io_get_fd(io);
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if (fd < 0)
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return false;
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memset(&ev, 0, sizeof(ev));
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len = read(fd, &ev, sizeof(ev));
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if (len < 0)
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return false;
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if ((size_t) len < sizeof(ev.type))
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return false;
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return true;
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}
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struct bt_uhid *bt_uhid_new_default(void)
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{
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struct bt_uhid *uhid;
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int fd;
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fd = open(UHID_DEVICE_FILE, O_RDWR | O_CLOEXEC);
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if (fd < 0)
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return NULL;
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uhid = bt_uhid_new(fd);
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if (!uhid) {
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close(fd);
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return NULL;
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}
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io_set_close_on_destroy(uhid->io, true);
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return uhid;
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}
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struct bt_uhid *bt_uhid_new(int fd)
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{
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struct bt_uhid *uhid;
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uhid = new0(struct bt_uhid, 1);
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if (!uhid)
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return NULL;
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uhid->io = io_new(fd);
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if (!uhid->io)
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goto failed;
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if (!io_set_read_handler(uhid->io, uhid_read_handler, uhid, NULL))
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goto failed;
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return bt_uhid_ref(uhid);
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failed:
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uhid_free(uhid);
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return NULL;
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}
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struct bt_uhid *bt_uhid_ref(struct bt_uhid *uhid)
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{
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if (!uhid)
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return NULL;
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__sync_fetch_and_add(&uhid->ref_count, 1);
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return uhid;
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}
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void bt_uhid_unref(struct bt_uhid *uhid)
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{
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if (!uhid)
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return;
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if (__sync_sub_and_fetch(&uhid->ref_count, 1))
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return;
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uhid_free(uhid);
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}
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bool bt_uhid_set_close_on_unref(struct bt_uhid *uhid, bool do_close)
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{
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if (!uhid || !uhid->io)
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return false;
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io_set_close_on_destroy(uhid->io, do_close);
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return true;
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}
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unsigned int bt_uhid_register(struct bt_uhid *uhid, uint32_t type,
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bt_uhid_notify_func_t func, void *user_data)
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{
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return 0;
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}
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bool bt_uhid_unregister(struct bt_uhid *uhid, unsigned int id)
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{
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return false;
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}
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int bt_uhid_send(struct bt_uhid *uhid, const struct uhid_event *ev)
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{
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int fd;
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ssize_t len;
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if (!uhid->io)
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return -ENOTCONN;
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fd = io_get_fd(uhid->io);
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len = write(fd, ev, sizeof(*ev));
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if (len < 0)
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return -errno;
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/* uHID kernel driver does not handle partial writes */
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return len != sizeof(*ev) ? -EIO : 0;
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}
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43
src/shared/uhid.h
Normal file
43
src/shared/uhid.h
Normal file
@ -0,0 +1,43 @@
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/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2014 Intel Corporation. All rights reserved.
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <linux/uhid.h>
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struct bt_uhid;
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struct bt_uhid *bt_uhid_new_default(void);
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struct bt_uhid *bt_uhid_new(int fd);
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struct bt_uhid *bt_uhid_ref(struct bt_uhid *uhid);
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void bt_uhid_unref(struct bt_uhid *uhid);
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bool bt_uhid_set_close_on_unref(struct bt_uhid *uhid, bool do_close);
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typedef void (*bt_uhid_callback_t)(struct uhid_event *ev, void *user_data);
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unsigned int bt_uhid_register(struct bt_uhid *uhid, uint32_t event,
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bt_uhid_callback_t func, void *user_data);
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bool bt_uhid_unregister(struct bt_uhid *uhid, unsigned int id);
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int bt_uhid_send(struct bt_uhid *uhid, const struct uhid_event *ev);
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37
unit/test-uhid.c
Normal file
37
unit/test-uhid.c
Normal file
@ -0,0 +1,37 @@
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/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2014 Intel Corporation. All rights reserved.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <glib.h>
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#include "src/shared/uhid.h"
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int main(int argc, char *argv[])
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{
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g_test_init(&argc, &argv, NULL);
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return g_test_run();
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}
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