diff --git a/src/ca/addrList.h b/src/ca/addrList.h
new file mode 100644
index 000000000..682391669
--- /dev/null
+++ b/src/ca/addrList.h
@@ -0,0 +1,17 @@
+
+
+
+
+
+union caAddr{
+        struct sockaddr_in      inetAddr;
+        struct sockaddr         sockAddr;
+};
+
+typedef struct {
+        ELLNODE                 node;
+        union caAddr            srcAddr;
+        union caAddr            destAddr;
+}caAddrNode;
+
+