new file mode 100644
--- /dev/null
+++ b/src/core/ngx_inet.h
@@ -0,0 +1,24 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_INET_H_INCLUDED_
+#define _NGX_INET_H_INCLUDED_
+
+
+typedef struct {
+    in_addr_t  addr;
+    in_addr_t  mask;
+} ngx_inet_cidr_t;
+
+
+size_t ngx_sock_ntop(int family, struct sockaddr *addr, u_char *text,
+                     size_t len);
+size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len);
+
+ngx_int_t ngx_ptocidr(ngx_str_t *text, void *cidr);
+
+
+#endif /* _NGX_INET_H_INCLUDED_ */