/* * * BlueZ - Bluetooth protocol stack for Linux * * Copyright (C) 2004-2009 Marcel Holtmann <marcel@holtmann.org> * * 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 * */ #include "ipc.h" #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) /* This table contains the string representation for messages types */ static const char *strtypes[] = { "BT_REQUEST", "BT_RESPONSE", "BT_INDICATION", "BT_ERROR", }; /* This table contains the string representation for messages names */ static const char *strnames[] = { "BT_GET_CAPABILITIES", "BT_OPEN", "BT_SET_CONFIGURATION", "BT_NEW_STREAM", "BT_START_STREAM", "BT_STOP_STREAM", "BT_SUSPEND_STREAM", "BT_RESUME_STREAM", "BT_CONTROL", }; int bt_audio_service_open(void) { int sk; int err; struct sockaddr_un addr = { AF_UNIX, BT_IPC_SOCKET_NAME }; sk = socket(PF_LOCAL, SOCK_STREAM, 0); if (sk < 0) { err = errno; fprintf(stderr, "%s: Cannot open socket: %s (%d)\n", __FUNCTION__, strerror(err), err); errno = err; return -1; } if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) { err = errno; fprintf(stderr, "%s: connect() failed: %s (%d)\n", __FUNCTION__, strerror(err), err); close(sk); errno = err; return -1; } return sk; } int bt_audio_service_close(int sk) { return close(sk); } int bt_audio_service_get_data_fd(int sk) { char cmsg_b[CMSG_SPACE(sizeof(int))], m; int err, ret; struct iovec iov = { &m, sizeof(m) }; struct msghdr msgh; struct cmsghdr *cmsg; memset(&msgh, 0, sizeof(msgh)); msgh.msg_iov = &iov; msgh.msg_iovlen = 1; msgh.msg_control = &cmsg_b; msgh.msg_controllen = CMSG_LEN(sizeof(int)); ret = recvmsg(sk, &msgh, 0); if (ret < 0) { err = errno; fprintf(stderr, "%s: Unable to receive fd: %s (%d)\n", __FUNCTION__, strerror(err), err); errno = err; return -1; } /* Receive auxiliary data in msgh */ for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL; cmsg = CMSG_NXTHDR(&msgh, cmsg)) { if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { memcpy(&ret, CMSG_DATA(cmsg), sizeof(int)); return ret; } } errno = EINVAL; return -1; } const char *bt_audio_strtype(uint8_t type) { if (type >= ARRAY_SIZE(strtypes)) return NULL; return strtypes[type]; } const char *bt_audio_strname(uint8_t name) { if (name >= ARRAY_SIZE(strnames)) return NULL; return strnames[name]; }