Merge pull request #21035 from leandrolanzieri/pr/wakaama/destroy_unu…

…sed_dtls_sessions

pkg/wakaama/client_connection: destroy unused DTLS sessions

pkg/wakaama/contrib/lwm2m_client_connection.c

@@ -382,13 +382,15 @@ static lwm2m_client_connection_t *_connection_create(uint16_t sec_obj_inst_id,
         res = sock_dtls_session_init(&client_data->dtls_sock, &conn->remote, &conn->session);
         if (res <= 0) {
             DEBUG("[lwm2m:client] could not initiate DTLS session\n");
+            sock_dtls_session_destroy(&client_data->dtls_sock, &conn->session);
             goto free_out;
         }
 
         DEBUG("[lwm2m:client] receiving DTLS handshake\n");
         res = sock_dtls_recv(&client_data->dtls_sock, &conn->session, buf, sizeof(buf), US_PER_SEC);
         if (res != -SOCK_DTLS_HANDSHAKE) {
             DEBUG("[lwm2m:client] error creating session: %i\n", res);
+            sock_dtls_session_destroy(&client_data->dtls_sock, &conn->session);
             goto free_out;
         }
         DEBUG("[lwm2m:client] connection to server successful\n");