Protocol: more work on protocol implementation.

Additional functions implemented for protocol and basic functions
to work with uuid. Source is buildable but actual build files are
not edited to accomodate the changes.

Signed-off-by: Ramūnas Mažeikis <ramunasnezinomas@gmail.com>

2 files changed, 34 insertions, 4 deletions

diff --git a/include/protocol.h b/include/protocol.h
index c1b786c..5872fa3 100644
--- a/include/protocol.h
+++ b/include/protocol.h
@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */
 
-#ifdef PROTOCOL_H_INCLUDED
+#ifndef PROTOCOL_H_INCLUDED
 #define PROTOCOL_H_INCLUDED
 
 #include <errno.h>
@@ -33,11 +33,28 @@ enum packet_type {
 };
 
 enum tlv_type {
-	TEXT,		/* NULL-terminated string. */
-	FPI1,		/* Fixed point. 1 decimal digit of precision. */
+	/* NULL-terminated string. */
+	TEXT,
+	
+	/* Fixed point. 1 decimal digit of precision. */
+	FPI1,
+	
+	/* Literally time_t*/
 	TIMESTAMP,
+	
+	/* Represents a request for lost message. Data is unsigned integer
+	 * that uniquely identifies the message. 
+	 */
 	REQUEST,
+	
+	/* Response to request. Begins with unsigned integer that represents
+	 * which message is begin repeated and the actual null-terminated
+	 * message after that.
+	 */
 	REPLY,
+	
+	/* UUID that represents a particular device.
+	 */
 	UUID
 };
 
diff --git a/include/utils.h b/include/utils.h
index ca2d2ee..daea864 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -1,6 +1,19 @@
-#ifdef PROJECT_UTILS_H
+#ifndef PROJECT_UTILS_H
 #define PROJECT_UTILS_H
 
+#include <stdint.h>
+
+typedef struct uuid_s {
+    uint64_t low;
+    uint64_t hi;
+} uuid_t;
+
+int cmp_uuid(uuid_t *first, uuid_t *second);
+
+/* Prints uuid in cannonical format.
+ */
+void uuid_to_str(uuid_t *to_print, char *buf);
+
 typedef int fpi1_t;
 
 fpi1_t add(fpi1_t a, fpi1_t b);