unicoap: dtls handshake timeout

Author: mguetschow

sys/net/application_layer/unicoap/drivers/rfc7252/dtls/transport.c

@@ -247,7 +247,7 @@ int unicoap_transport_sendv_dtls(iolist_t* iolist, const sock_udp_ep_t* remote,
 
     if (unlikely(local)) {
         sock_dtls_aux_tx_t aux_tx = { .flags = SOCK_AUX_SET_LOCAL, .local = *local };
-        res = sock_dtls_sendv_aux(&_dtls_socket, session, iolist, SOCK_NO_TIMEOUT, &aux_tx);
+        res = sock_dtls_sendv_aux(&_dtls_socket, session, iolist, 500000, &aux_tx);
     }
     else {
         res = sock_dtls_sendv_aux(&_dtls_socket, session, iolist,
@@ -256,8 +256,9 @@ int unicoap_transport_sendv_dtls(iolist_t* iolist, const sock_udp_ep_t* remote,
     DTLS_DEBUG("done sending\n");
 
     switch (res) {
-    case -EHOSTUNREACH:
+    case -EHOSTUNREACH: // todo: not one of the return values
     case -ENOTCONN:
+    case -ETIMEDOUT:
     case 0:
         DTLS_DEBUG("DTLS sock not connected or remote unreachable. "
                    "Destroying session.\n");