diff --git a/types.hpp b/types.hpp
index 5b943f4..9c2237f 100644
--- a/types.hpp
+++ b/types.hpp
@@ -26,6 +26,8 @@
 using ObjectTree = std::map<DbusObjectPath,
                             std::map<DbusService, std::vector<DbusInterface>>>;
 
+using InterfaceList = std::vector<std::string>;
+
 namespace sensor
 {
 
@@ -110,10 +112,19 @@
 
 constexpr auto MAC_ADDRESS_SIZE_BYTE = 6;
 constexpr auto VLAN_SIZE_BYTE = 2;
+constexpr auto IPSRC_SIZE_BYTE = 1;
 constexpr auto BITS_32 = 32;
 constexpr auto MASK_32_BIT = 0xFFFFFFFF;
 constexpr auto VLAN_ID_MASK = 0x00000FFF;
 constexpr auto VLAN_ENABLE_MASK = 0x8000;
 
+enum class IPOrigin: uint8_t
+{
+    UNSPECIFIED = 0,
+    STATIC = 1,
+    DHCP = 2,
+};
+
+
 }//namespace network
 }//namespace ipmi