sock_dodtls: provide getters for sock and session

To be able to implement the DNS message exchange outside the module.

sys/include/net/sock/dodtls.h

@@ -32,6 +32,7 @@
 #ifndef NET_SOCK_DODTLS_H
 #define NET_SOCK_DODTLS_H
 
+#include "net/sock/dtls.h"
 #include "net/sock/udp.h"
 
 #ifdef __cplusplus
@@ -105,6 +106,20 @@ int sock_dodtls_query(const char *domain_name, void *addr_out, int family);
  */
 int sock_dodtls_get_server(sock_udp_ep_t *server);
 
+/**
+ * @brief   Return the sock used by the DNS over DTLS client
+ *
+ * @return  The sock used by the DNS over DTLS client
+ */
+sock_dtls_t *sock_dodtls_get_dtls_sock(void);
+
+/**
+ * @brief   Return the DTLS ssession used by the DNS over DTLS client
+ *
+ * @return  The DTLS session used by the DNS over DTLS client
+ */
+sock_dtls_session_t *sock_dodtls_get_server_session(void);
+
 /**
  * @brief       Configure and establish session with DNS over DTLS server
  *

sys/net/application_layer/sock_dodtls/sock_dodtls.c

@@ -136,6 +136,16 @@ int sock_dodtls_get_server(sock_udp_ep_t *server)
     return res;
 }
 
+sock_dtls_t *sock_dodtls_get_dtls_sock(void)
+{
+    return &_dtls_sock;
+}
+
+sock_dtls_session_t *sock_dodtls_get_server_session(void)
+{
+    return &_server_session;
+}
+
 int sock_dodtls_set_server(const sock_udp_ep_t *server,
                            const credman_credential_t *creds)
 {