Move main() out of clatd.c.
This allows us to unit test methods that are in clatd.c.
Also simplify the build file, adding a defaults stanza and
grouping files in a filegroup so that both the code and the unit
test have the same source files.
Test: atest clatd_test
Test: builds, boots, 464xlat works
Change-Id: I544c3ee846abd3e38b80a2d9a4db5497fd9beb0c
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..e9551ee
--- /dev/null
+++ b/common.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * 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.
+ *
+ * common.h - common definitions
+ */
+#ifndef __CLATD_COMMON_H__
+#define __CLATD_COMMON_H__
+
+#include <sys/uio.h>
+
+// A clat_packet is an array of iovec structures representing a packet that we are translating.
+// The CLAT_POS_XXX constants represent the array indices within the clat_packet that contain
+// specific parts of the packet. The packet_* functions operate on all the packet segments past a
+// given position.
+typedef enum {
+ CLAT_POS_TUNHDR,
+ CLAT_POS_IPHDR,
+ CLAT_POS_FRAGHDR,
+ CLAT_POS_TRANSPORTHDR,
+ CLAT_POS_ICMPERR_IPHDR,
+ CLAT_POS_ICMPERR_FRAGHDR,
+ CLAT_POS_ICMPERR_TRANSPORTHDR,
+ CLAT_POS_PAYLOAD,
+ CLAT_POS_MAX
+} clat_packet_index;
+typedef struct iovec clat_packet[CLAT_POS_MAX];
+
+#endif /* __CLATD_COMMON_H__ */