android clat service
This software provides the nat 4->6 translation needed for the "clat" part of
the 464xlat standard. It is needed for better IPv4 application support while
on an IPv6-only mobile network connection using 464xlat's nat64 (such as
T-Mobile's IPv6 trial).
A general diagram of how 464xlat works:
http://dan.drown.org/android/clat/Clat-Plat.png
Depends-on: I2392f8127dcd90d16b0f20ff31bcc5aa096db464
Change-Id: If2bc6916fc66fd4bca7cc241c83cfae839b82e15
Signed-off-by: Daniel Drown <dan-android@drown.org>
diff --git a/logging.c b/logging.c
new file mode 100644
index 0000000..f2f3d50
--- /dev/null
+++ b/logging.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2011 Daniel Drown
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * logging.c - print a log message
+ */
+
+#include <stdarg.h>
+#include <android/log.h>
+
+#include "logging.h"
+#include "debug.h"
+
+/* function: logmsg
+ * prints a log message to android's log buffer
+ * prio - the log message priority
+ * fmt - printf format specifier
+ * ... - printf format arguments
+ */
+void logmsg(int prio, const char *fmt, ...) {
+ va_list ap;
+
+ va_start(ap, fmt);
+ __android_log_vprint(prio, "clatd", fmt, ap);
+ va_end(ap);
+}
+
+/* function: logmsg_dbg
+ * prints a log message to android's log buffer if CLAT_DEBUG is set
+ * prio - the log message priority
+ * fmt - printf format specifier
+ * ... - printf format arguments
+ */
+void logmsg_dbg(int prio, const char *fmt, ...) {
+#if CLAT_DEBUG
+ va_list ap;
+
+ va_start(ap, fmt);
+ __android_log_vprint(prio, "clatd", fmt, ap);
+ va_end(ap);
+#endif
+}
