Add capabilities to bluetoothd.
As android init.rc doesn't support applying linux capabilities,
add them after starting the bluetooth daemon as root.
Original Change by Nick Pelly. <npelly@google.com>
Moved to Bluez4 by Jaikumar Ganesh. <jaikumar@google.com>
Change-Id: I9406ddc33a6510845b6709b321d828b160ed10ca
diff --git a/common/android_bluez.c b/common/android_bluez.c
new file mode 100644
index 0000000..e16957d
--- /dev/null
+++ b/common/android_bluez.c
@@ -0,0 +1,43 @@
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2004-2009 Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <private/android_filesystem_config.h>
+#include <sys/prctl.h>
+#include <linux/capability.h>
+
+/* Set UID to bluetooth w/ CAP_NET_RAW, CAP_NET_ADMIN and CAP_NET_BIND_SERVICE
+ * (Android's init.rc does not yet support applying linux capabilities) */
+void android_set_aid_and_cap() {
+ prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0);
+ setuid(AID_BLUETOOTH);
+
+ struct __user_cap_header_struct header;
+ struct __user_cap_data_struct cap;
+ header.version = _LINUX_CAPABILITY_VERSION;
+ header.pid = 0;
+ cap.effective = cap.permitted = 1 << CAP_NET_RAW |
+ 1 << CAP_NET_ADMIN |
+ 1 << CAP_NET_BIND_SERVICE;
+ cap.inheritable = 0;
+ capset(&header, &cap);
+}
diff --git a/src/main.c b/src/main.c
index 1aaa181..7ae95bb 100644
--- a/src/main.c
+++ b/src/main.c
@@ -373,6 +373,13 @@
uint16_t mtu = 0;
GKeyFile *config;
+#ifdef ANDROID_SET_AID_AND_CAP
+ /* Unfortunately Android's init.rc does not yet support applying
+ * capabilities. So we must do it in-process. */
+ void *android_set_aid_and_cap(void);
+ android_set_aid_and_cap();
+#endif
+
init_defaults();
#ifdef HAVE_CAPNG
