Kconfig: Expose pkg/tinydtls configurations

Kconfig

@@ -9,15 +9,12 @@ mainmenu "RIOT Configuration"
 # For now, get used modules as macros from this file (see kconfig.mk)
 osource "$(KCONFIG_GENERATED_DEPENDENCIES)"
 
-rsource "drivers/Kconfig"
-rsource "sys/Kconfig"
-rsource "pkg/Kconfig"
-
 # The application may declare new symbols as well
 osource "$(APPDIR)/Kconfig"
 
 rsource "drivers/Kconfig"
 rsource "sys/Kconfig"
+rsource "pkg/Kconfig"
 
 comment "RIOT is in a migration phase."
 comment "Some configuration options may not be here. Use CFLAGS instead."

pkg/Kconfig

@@ -6,6 +6,6 @@
 #
 menu "Packages"
 
+rsource "tinydtls/Kconfig"
 
 endmenu # Packages
-

pkg/tinydtls/Kconfig

@@ -0,0 +1,51 @@
+# Copyright (c) 2019 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+menuconfig KCONFIG_PKG_TINYDTLS
+    bool "Configure tinydtls"
+    depends on PKG_TINYDTLS
+    help
+        Configure tinydtls package via Kconfig.
+
+if KCONFIG_PKG_TINYDTLS
+
+# TODO change to multiple choice after DTLS application support enabling more than one types of cypher suites
+choice
+    bool "Cipher suite to enable"
+    default DTLS_PSK
+
+config DTLS_PSK
+    bool "TLS_PSK_WITH_AES_128_CCM_8"
+
+config DTLS_ECC
+    bool "TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8"
+
+endchoice
+
+config DTLS_DEBUG
+    bool "Enable debug log"
+    help
+        Enable debug log output for tinydtls
+
+config DTLS_CONTEXT_MAX
+    int "Max DTLS context"
+    default 2
+    help
+        The maximum number of DTLS context at the same time.
+
+config DTLS_PEER_MAX
+    int "Max number of peers"
+    default 1
+    help
+        The maximum number of DTLS peers.
+
+config DTLS_HANDSHAKE_MAX
+    int "Max concurrent handshake"
+    default 1
+    help
+        The maximum number of concurrent DTLS handshakes.
+
+endif # KCONFIG_PKG_TINYDTLS