2 files changed, 14 insertions, 2 deletions
diff --git a/shared-module/network/__init__.c b/shared-module/network/__init__.c
index a674e8478..96648b260 100644
--- a/shared-module/network/__init__.c
+++ b/shared-module/network/__init__.c
@@ -43,6 +43,12 @@ void network_module_init(void) {
 }
 
 void network_module_deinit(void) {
+    for (mp_uint_t i = 0; i < MP_STATE_PORT(mod_network_nic_list).len; i++) {
+        mp_obj_t nic = MP_STATE_PORT(mod_network_nic_list).items[i];
+        mod_network_nic_type_t *nic_type = (mod_network_nic_type_t*)mp_obj_get_type(nic); 
+        if (nic_type->deinit != NULL) nic_type->deinit(nic);
+    }
+    mp_obj_list_set_len(&MP_STATE_PORT(mod_network_nic_list), 0);
 }
 
 void network_module_background(void) {
@@ -93,3 +99,7 @@ void network_module_create_random_mac_address(uint8_t *mac) {
     mac[4] = (uint8_t)(rb2 >> 8);
     mac[5] = (uint8_t)(rb2);
 }
+
+uint16_t network_module_create_random_source_tcp_port(void) {
+    return 0xc000 | shared_modules_random_getrandbits(14);
+}
diff --git a/shared-module/network/__init__.h b/shared-module/network/__init__.h
index 00a3c3957..f4eb05bb5 100644
--- a/shared-module/network/__init__.h
+++ b/shared-module/network/__init__.h
@@ -25,11 +25,12 @@
  * THE SOFTWARE.
  */
 
-void network_module_create_random_mac_address(uint8_t *mac);
-
 #ifndef MICROPY_INCLUDED_SHARED_MODULE_NETWORK___INIT___H
 #define MICROPY_INCLUDED_SHARED_MODULE_NETWORK___INIT___H
 
+void network_module_create_random_mac_address(uint8_t *mac);
+uint16_t network_module_create_random_source_tcp_port(void);
+
 #define MOD_NETWORK_IPADDR_BUF_SIZE (4)
 
 #define MOD_NETWORK_AF_INET (2)
@@ -62,6 +63,7 @@ typedef struct _mod_network_nic_type_t {
     int (*settimeout)(struct _mod_network_socket_obj_t *socket, mp_uint_t timeout_ms, int *_errno);
     int (*ioctl)(struct _mod_network_socket_obj_t *socket, mp_uint_t request, mp_uint_t arg, int *_errno);
     void (*timer_tick)(struct _mod_network_socket_obj_t *socket);
+    void (*deinit)(struct _mod_network_socket_obj_t *socket);
 } mod_network_nic_type_t;
 
 typedef struct _mod_network_socket_obj_t {