From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
For SDP server we need to bind to lower port, acquire this capability.
---
android/main.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
configure.ac | 4 ++++
2 files changed, 75 insertions(+)
diff --git a/android/main.c b/android/main.c
index 7968ed0..a100013 100644
--- a/android/main.c
+++ b/android/main.c
@@ -32,6 +32,22 @@
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/prctl.h>
+#include <linux/capability.h>
+
+/**
+ * Include <sys/capability.h> for host build and
+ * also for Android 4.3 when it is added to bionic
+ */
+#if !defined(ANDROID) || (PLATFORM_SDK_VERSION > 17)
+#include <sys/capability.h>
+#endif
+
+#if defined(ANDROID)
+#include <private/android_filesystem_config.h>
+#endif
#include <glib.h>
@@ -279,6 +295,58 @@ static void cleanup_mgmt_interface(void)
mgmt_if = NULL;
}
+static bool android_set_aid_and_cap(void)
+{
+ struct __user_cap_header_struct header;
+ struct __user_cap_data_struct cap;
+#if defined(ANDROID)
+ gid_t groups[] = {AID_NET_BT, AID_NET_BT_ADMIN, AID_NET_ADMIN};
+#endif
+
+ DBG("pid %d uid %d gid %d", getpid(), getuid(), getgid());
+
+ header.version = _LINUX_CAPABILITY_VERSION;
+
+ prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0);
+
+#if defined(ANDROID)
+ if (setgid(AID_BLUETOOTH) < 0)
+ warn("%s: setgid(): %s", __func__, strerror(errno));
+
+ if (setuid(AID_BLUETOOTH) < 0)
+ warn("%s: setuid(): %s", __func__, strerror(errno));
+#endif
+
+ header.version = _LINUX_CAPABILITY_VERSION;
+ header.pid = 0;
+
+ cap.effective = cap.permitted =
+ CAP_TO_MASK(CAP_SETGID) |
+ CAP_TO_MASK(CAP_NET_RAW) |
+ CAP_TO_MASK(CAP_NET_ADMIN) |
+ CAP_TO_MASK(CAP_NET_BIND_SERVICE);
+ cap.inheritable = 0;
+
+ if (capset(&header, &cap) < 0) {
+ error("%s: capset(): %s", __func__, strerror(errno));
+ return false;
+ }
+
+#if defined(ANDROID)
+ if (setgroups(sizeof(groups)/sizeof(groups[0]), groups) < 0)
+ warn("%s: setgroups: %s", __func__, strerror(errno));
+#endif
+ if (capget(&header, &cap) < 0)
+ error("%s: capget(): %s", __func__, strerror(errno));
+ else
+ DBG("Caps: eff: 0x%x, perm: 0x%x, inh: 0x%x", cap.effective,
+ cap.permitted, cap.inheritable);
+
+ DBG("pid %d uid %d gid %d", getpid(), getuid(), getgid());
+
+ return true;
+}
+
int main(int argc, char *argv[])
{
GOptionContext *context;
@@ -312,6 +380,9 @@ int main(int argc, char *argv[])
sigaction(SIGINT, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
+ if (android_set_aid_and_cap() == false)
+ exit(EXIT_FAILURE);
+
init_mgmt_interface();
sdp_start();
diff --git a/configure.ac b/configure.ac
index 7b1f64a..5406434 100644
--- a/configure.ac
+++ b/configure.ac
@@ -247,4 +247,8 @@ AC_ARG_ENABLE(android, AC_HELP_STRING([--enable-android],
[enable_android=${enableval}])
AM_CONDITIONAL(ANDROID, test "${enable_android}" = "yes")
+if (test "${android_daemon}" = "yes"); then
+ AC_CHECK_LIB(cap, capget, dummy=yes, AC_MSG_ERROR(libcap is required))
+fi
+
AC_OUTPUT(Makefile src/bluetoothd.8 lib/bluez.pc)
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
