Reduce RPC Proxy memory consumption

These changes,

- Reduce the memory consumption of the RPC Proxy
by reducing the number of copies of the RPC Proxy messsage being
simultaneously held.

- Add a KConfig flag for defining the Network connection
retry timer period.

- Redifine the RPC Proxy systemName string length from
LIMIT_MAX_IPC_INTERFACE_NAME_BYTES (128 bytes) to
LIMIT_MAX_SYSTEM_NAME_BYTES (64 bytes).

Resolves: LE-13369
Change-Id: Ie842a06aaabd3a79c70c59d1fe78237b82c3e06a

apps/tools/rpcTool/tool.c

@@ -477,7 +477,7 @@ static void PrintAllBindings
 )
 {
     char serviceName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
-    char systemName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
+    char systemName[LIMIT_MAX_SYSTEM_NAME_BYTES];
     char remoteServiceName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
     uint32_t serviceId;
     le_result_t result;
@@ -542,7 +542,7 @@ static void PrintAllLinks
     void
 )
 {
-    char systemName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
+    char systemName[LIMIT_MAX_SYSTEM_NAME_BYTES];
     char linkName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
     char parameters[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
     le_rpc_NetworkState_t state;
@@ -641,7 +641,7 @@ COMPONENT_INIT
             {
                 case OBJECT_BINDING:
                 {
-                    char systemName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
+                    char systemName[LIMIT_MAX_SYSTEM_NAME_BYTES];
                     char remoteServiceName[LIMIT_MAX_IPC_INTERFACE_NAME_BYTES];
                     uint32_t serviceId;
                     result = le_rpc_GetSystemBinding(

framework/KConfig

@@ -633,26 +633,35 @@ config RPC_PROXY_MAX_MESSAGE
   The maximum size of a RPC message that can be sent and received between RPC-enabled systems.
 
 config RPC_PROXY_NETWORK_KEEPALIVE_SERVICE_INTERVAL
-  int "Frequency of RPC Keep-Alive network service"
+  int "Frequency of RPC Keep-Alive network service (in seconds)"
   depends on RPC
-  range 0 1800
+  range 1 4294967295
   default 120
   ---help---
   The Frequency of Keep-Alice service, used to monitor the health of a remote RPC-enabled system.
 
-config RPC_PROXY_NETWORK_KEEPALIVE_REQUEST_TIMER_INTERVAL
-  int "RPC Keep-Alive time-out period"
+config RPC_PROXY_NETWORK_KEEPALIVE_TIMEOUT_TIMER_INTERVAL
+  int "RPC Keep-Alive time-out period (in seconds)"
   depends on RPC
-  range 0 300
+  range 1 4294967295
   default 30
   ---help---
   The length of time the RPC Proxy will wait before declaring a
   remote RPC-enabled system as unreachable (DOWN).
 
+config RPC_PROXY_NETWORK_CONNECTION_RETRY_TIMER_INTERVAL
+  int "Network connection retry timer (in seconds)"
+  depends on RPC
+  range 1 4294967295
+  default 15
+  ---help---
+  The length of time the RPC Proxy will wait before attempting to
+  re-connect to a remote RPC-enabled system.
+
 config RPC_PROXY_CONNECT_SERVICE_REQUEST_TIMER_INTERVAL
-  int "RPC Connect-Service time-out period"
+  int "RPC Connect-Service time-out period (in seconds)"
   depends on RPC
-  range 0 300
+  range 1 4294967295
   default 15
   ---help---
   The length of time the RPC Proxy will wait before abandoning a