Changing the RPC retry logic to be bounded by time rather than by the

number of retries to match what is being done in the Windows platform.

CASA-auth-token/client/library/linux/rpc.c

@@ -30,6 +30,8 @@
 //===[ Type definitions ]==================================================
 
 #define MAX_RPC_RETRIES 3
+#define MILLISECONDS_BETWEEN_RPC_RETRIES 3000
+#define MAX_RPC_TIME_MILLISECONDS 60000
 
 //===[ External prototypes ]===============================================
 
@@ -554,12 +556,37 @@ Rpc(
 {
    CasaStatus  retStatus;
    int         retries = 0;
+   DWORD       startTime = GetTickCount();
+   DWORD       currentTime;
 
    DbgTrace(1, "-Rpc- Start\n", 0);
 
    // Retry the RPC as needed
    do
    {
+      // Check if this is a retry
+      if (retries != 0)
+      {
+         // This is a retry, check if we should keep retrying.
+         currentTime = GetTickCount();
+         if (currentTime > startTime)
+         {
+            if ((currentTime - startTime) > MAX_RPC_TIME_MILLISECONDS)
+            {
+               DbgTrace(1, "-Rpc- Stopping after %d retries\n", retries);
+               break;
+            }
+         }
+         else
+         {
+            // The clock must have wrapped, treat it as if no time has elapsed.
+            startTime = currentTime;
+         }
+
+         // Pause before the next retry
+         usleep(MILLISECONDS_BETWEEN_RPC_RETRIES * 1000);
+      }
+
       // Issue the RPC
       retStatus = InternalRpc(pSession,
                               pMethod,
@@ -571,8 +598,7 @@ Rpc(
       // Account for this try
       retries ++;
 
-   } while (CasaStatusCode(retStatus) == CASA_STATUS_CONNECTION_ERROR
+   } while (CasaStatusCode(retStatus) == CASA_STATUS_CONNECTION_ERROR);
-            && retries < MAX_RPC_RETRIES);
 
    DbgTrace(1, "-Rpc- End, retStatus = %0X\n", retStatus);