mirror of
https://git.kernel.org/pub/scm/bluetooth/bluez.git
synced 2024-11-25 21:24:16 +08:00
5c6db9e861
Variables which are assigned to the errno variable (usually called "err") should be negative, and "-err" should be used where a positive value is needed. This commit also changes places where errno can be replaced with -err (for consistency) and one perror() usage error.
135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
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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 "ipc.h"
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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/* This table contains the string representation for messages types */
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static const char *strtypes[] = {
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"BT_REQUEST",
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"BT_RESPONSE",
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"BT_INDICATION",
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"BT_ERROR",
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};
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/* This table contains the string representation for messages names */
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static const char *strnames[] = {
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"BT_GET_CAPABILITIES",
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"BT_OPEN",
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"BT_SET_CONFIGURATION",
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"BT_NEW_STREAM",
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"BT_START_STREAM",
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"BT_STOP_STREAM",
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"BT_SUSPEND_STREAM",
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"BT_RESUME_STREAM",
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"BT_CONTROL",
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};
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int bt_audio_service_open(void)
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{
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int sk;
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int err;
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struct sockaddr_un addr = {
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AF_UNIX, BT_IPC_SOCKET_NAME
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};
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sk = socket(PF_LOCAL, SOCK_STREAM, 0);
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if (sk < 0) {
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err = -errno;
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fprintf(stderr, "%s: Cannot open socket: %s (%d)\n",
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__FUNCTION__, strerror(-err), -err);
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errno = -err;
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return -1;
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}
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if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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err = -errno;
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fprintf(stderr, "%s: connect() failed: %s (%d)\n",
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__FUNCTION__, strerror(-err), -err);
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close(sk);
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errno = -err;
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return -1;
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}
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return sk;
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}
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int bt_audio_service_close(int sk)
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{
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return close(sk);
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}
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int bt_audio_service_get_data_fd(int sk)
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{
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char cmsg_b[CMSG_SPACE(sizeof(int))], m;
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int err, ret;
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struct iovec iov = { &m, sizeof(m) };
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struct msghdr msgh;
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struct cmsghdr *cmsg;
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memset(&msgh, 0, sizeof(msgh));
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msgh.msg_iov = &iov;
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msgh.msg_iovlen = 1;
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msgh.msg_control = &cmsg_b;
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msgh.msg_controllen = CMSG_LEN(sizeof(int));
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ret = recvmsg(sk, &msgh, 0);
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if (ret < 0) {
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err = -errno;
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fprintf(stderr, "%s: Unable to receive fd: %s (%d)\n",
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__FUNCTION__, strerror(-err), -err);
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errno = -err;
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return -1;
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}
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/* Receive auxiliary data in msgh */
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for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL;
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cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
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if (cmsg->cmsg_level == SOL_SOCKET
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&& cmsg->cmsg_type == SCM_RIGHTS) {
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memcpy(&ret, CMSG_DATA(cmsg), sizeof(int));
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return ret;
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}
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}
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errno = EINVAL;
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return -1;
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}
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const char *bt_audio_strtype(uint8_t type)
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{
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if (type >= ARRAY_SIZE(strtypes))
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return NULL;
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return strtypes[type];
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}
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const char *bt_audio_strname(uint8_t name)
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{
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if (name >= ARRAY_SIZE(strnames))
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return NULL;
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return strnames[name];
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}
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