支持tun模式调通

entry/include/kni_tun.h

@@ -0,0 +1,10 @@
+enum kni_tun_mode{
+	KNI_TUN_MODE_BLOCK = 0,
+	KNI_TUN_MODE_NOBLOCK = 2,
+};
+
+struct kni_tun_handle;
+void kni_tun_destroy(struct kni_tun_handle *tun_handle);
+struct kni_tun_handle* kni_tun_init(char *tun_name, enum kni_tun_mode mode, void *logger);
+int kni_tun_write(struct kni_tun_handle *handle, char *buff, uint16_t buff_len);
+int kni_tun_read(struct kni_tun_handle *handle, char *buff, uint16_t buff_len);