1 files changed, 133 insertions, 0 deletions
diff --git a/audio/ipc.c b/audio/ipc.c
new file mode 100644
index 0000000..1bdad78
--- /dev/null
+++ b/audio/ipc.c
@@ -0,0 +1,133 @@
+/*
+ *
+ *  BlueZ - Bluetooth protocol stack for Linux
+ *
+ *  Copyright (C) 2004-2010  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];
+}