Added encode/decode for Time_Synchronization_Recipients.

Added Send_TimeSync_Remote() which can use specific destination address.
Added function prototypes for time sync master in the handlers.

bacnet-stack/include/client.h

@@ -168,6 +168,10 @@ extern "C" {
     void Send_TimeSync(
         BACNET_DATE * bdate,
         BACNET_TIME * btime);
+    void Send_TimeSync_Remote(
+        BACNET_ADDRESS * dest,
+        BACNET_DATE * bdate,
+        BACNET_TIME * btime);
     void Send_TimeSyncUTC(
         BACNET_DATE * bdate,
         BACNET_TIME * btime);

bacnet-stack/include/handlers.h

@@ -176,15 +176,27 @@ extern "C" {
         uint16_t service_len,
         BACNET_ADDRESS * src);
 
+    /* time synchronization handlers */
     void handler_timesync(
         uint8_t * service_request,
         uint16_t service_len,
         BACNET_ADDRESS * src);
-
     void handler_timesync_utc(
         uint8_t * service_request,
         uint16_t service_len,
         BACNET_ADDRESS * src);
+    /* time sync master features */
+    int handler_timesync_encode_recipients(
+        uint8_t * apdu,
+        int max_apdu);
+    void handler_timesync_task(void);
+    void handler_timesync_init(void);
+    bool handler_timesync_recipient_write(
+        BACNET_WRITE_PROPERTY_DATA * wp_data);
+    bool handler_timesync_interval_set(uint32_t minutes);
+    bool handler_timesync_recipient_address_set(
+        unsigned index,
+        BACNET_ADDRESS *address);
 
     void handler_read_property_multiple(
         uint8_t * service_request,

bacnet-stack/include/timesync.h

@@ -28,6 +28,23 @@
 #include <stdbool.h>
 #include "bacdef.h"
 
+struct BACnet_Recipient_List;
+typedef struct BACnet_Recipient_List {
+    /*
+        BACnetRecipient ::= CHOICE {
+            device [0] BACnetObjectIdentifier,
+            address [1] BACnetAddress
+        }
+    */
+    uint8_t tag;
+    union {
+        BACNET_OBJECT_ID device;
+        BACNET_ADDRESS address;
+    } type;
+    /* simple linked list */
+    struct BACnet_Recipient_List *next;
+} BACNET_RECIPIENT_LIST;
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
@@ -63,6 +80,15 @@ extern "C" {
         BACNET_DATE * my_date,
         BACNET_TIME * my_time);
 
+    int timesync_encode_timesync_recipients(
+        uint8_t * apdu,
+        unsigned max_apdu,
+        BACNET_RECIPIENT_LIST *recipient);
+    int timesync_decode_timesync_recipients(
+        uint8_t * apdu,
+        unsigned apdu_len,
+        BACNET_RECIPIENT_LIST *recipient);
+
 #ifdef TEST
 #include "ctest.h"
     void testTimeSync(