test_storage: extend test harness; datastorage: two bug fixes

datastorage (bug fix): deleting expired array item would fail to test next item
test_storage: extended to cover all required datastorage entry points
test_storage: added ability to read script file
test_storage: added new and revised test scripts
TESTING.md: added to describe testing approach
general: added various TODO notes on things to come back to
general: revised #includes to make each "self-compiling"
general: revised #includes to minimise usage across source files
general: moved declarations and defintions to simplify and rationalise code
datastorage: refactor to support scalability testing
datastorage: made independent of time() calls to support testing
datastorage: fixed redundant use of both SORT_NUM and SORT_LENGTH defines
datastorage: fake kicking to test clients move between access points
msghandler: new module to reduce compile time interdependencies
mshhandler: (issue #100?) fixed SEGV memcpy() in dump_client() using strncpy()
ubus: merged uface into ubus
mac_utils: new module for MAC address utilites
test_header: added target to help #include rationalisation

Tested-by: Nick Hainke <vincent@systemli.org>

src/include/mac_utils.h

@@ -0,0 +1,43 @@
+#ifndef __DAWN_MAC_UTILS_H
+#define __DAWN_MAC_UTILS_H
+
+#include <stdint.h>
+
+#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
+#define STR2MAC(a) &(a)[0], &(a)[1], &(a)[2], &(a)[3], &(a)[4], &(a)[5]
+
+#define MACSTR "%02X:%02X:%02X:%02X:%02X:%02X"
+#define MACSTRLOWER "%02x:%02x:%02x:%02x:%02x:%02x"
+
+#ifndef ETH_ALEN
+#define ETH_ALEN 6
+#endif
+
+/**
+ * Convert mac adress string to mac adress.
+ * @param txt
+ * @param addr
+ * @return
+ */
+int hwaddr_aton(const char* txt, uint8_t* addr);
+
+/**
+ * Convert mac to use big characters.
+ * @param in
+ * @param out
+ * @return
+ */
+int convert_mac(char* in, char* out);
+
+/**
+ * Write mac to a file.
+ * @param path
+ * @param addr
+ */
+void write_mac_to_file(char* path, uint8_t addr[]);
+
+int mac_is_equal(const uint8_t addr1[], const uint8_t addr2[]);
+
+int mac_is_greater(const uint8_t addr1[], const uint8_t addr2[]);
+
+#endif