From 1980b94728240567a348d750d794236dbc789f5d Mon Sep 17 00:00:00 2001
From: M Aiman Ismail <muhammadaimanbin.ismail@haw-hamburg.de>
Date: Thu, 9 Jul 2020 10:17:05 +0200
Subject: [PATCH] examples/dtls-echo: fix silent fail with ECC

---
 examples/dtls-echo/dtls-client.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/examples/dtls-echo/dtls-client.c b/examples/dtls-echo/dtls-client.c
index baa5d92915..f8ab7e9221 100644
--- a/examples/dtls-echo/dtls-client.c
+++ b/examples/dtls-echo/dtls-client.c
@@ -43,9 +43,9 @@
 
 /* Delay to give time to the remote peer to do the compute (client only). */
 #ifdef CONFIG_DTLS_ECC
-#define DEFAULT_US_DELAY 10000000
+#define DEFAULT_US_DELAY    (20 * US_PER_SEC)
 #else
-#define DEFAULT_US_DELAY 100
+#define DEFAULT_US_DELAY    (1 * US_PER_SEC)
 #endif
 
 static int dtls_connected = 0; /* This is handled by Tinydtls callbacks */
@@ -108,7 +108,7 @@ static int dtls_handle_read(dtls_context_t *ctx)
     }
 
     ssize_t res = sock_udp_recv(sock, packet_rcvd, sizeof(packet_rcvd),
-                                1 * US_PER_SEC + DEFAULT_US_DELAY, &remote);
+                                DEFAULT_US_DELAY, &remote);
 
     if (res <= 0) {
         if ((ENABLE_DEBUG) && (res != -EAGAIN) && (res != -ETIMEDOUT)) {
@@ -455,6 +455,11 @@ static void client_send(char *addr_str, char *data)
         watch--;
     } /* END while */
 
+    /* check if we failed to send */
+    if ((app_data_buf != 0)) {
+        printf("Failed to send the data\n");
+    }
+
     /*
      * BUG: tinyDTLS (<= 0.8.6)
      * If dtls_connect() is called but the handshake does not complete (e.g.