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-rw-r--r--audio/ipc.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/audio/ipc.c b/audio/ipc.c
new file mode 100644
index 00000000..e7b712da
--- /dev/null
+++ b/audio/ipc.c
@@ -0,0 +1,119 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2004-2008 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"
+
+/* This table contains the string representation for messages */
+static const char *strmsg[] = {
+ "BT_GETCAPABILITIES_REQ",
+ "BT_GETCAPABILITIES_RSP",
+ "BT_SETCONFIGURATION_REQ",
+ "BT_SETCONFIGURATION_RSP",
+ "BT_STREAMSTART_REQ",
+ "BT_STREAMSTART_RSP",
+ "BT_STREAMSTOP_REQ",
+ "BT_STREAMSTOP_RSP",
+ "BT_STREAMSUSPEND_IND",
+ "BT_STREAMRESUME_IND",
+ "BT_CONTROL_REQ",
+ "BT_CONTROL_RSP",
+ "BT_CONTROL_IND",
+ "BT_STREAMFD_IND",
+};
+
+int bt_audio_service_open()
+{
+ 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)
+ return (*(int *) CMSG_DATA(cmsg));
+ }
+
+ errno = EINVAL;
+ return -1;
+}
+
+const char *bt_audio_strmsg(int type)
+{
+ if (type < 0 || type > (sizeof(strmsg) / sizeof(strmsg[0])))
+ return NULL;
+
+ return strmsg[type];
+}
+