diff -urNb quagga-0.96.5/lib/sockunion.h quagga-0.96.5-fbsd22/lib/sockunion.h
--- quagga-0.96.5/lib/sockunion.h	Sat Dec 14 01:15:29 2002
+++ quagga-0.96.5-fbsd22/lib/sockunion.h	Wed Aug 25 16:06:13 2004
@@ -125,4 +125,30 @@
 inet_aton (const char *cp, struct in_addr *inaddr);
 #endif
 
+/*
+ * Data types.
+ */
+typedef u_char          sa_family_t;
+#ifdef  _BSD_SOCKLEN_T_
+typedef _BSD_SOCKLEN_T_ socklen_t;
+#undef  _BSD_SOCKLEN_T_
+#endif
+
+/*
+ * RFC 2553: protocol-independent placeholder for socket addresses
+ */
+#define _SS_MAXSIZE     128
+#define _SS_ALIGNSIZE   (sizeof(int64_t))
+#define _SS_PAD1SIZE    (_SS_ALIGNSIZE - sizeof(u_char) - sizeof(sa_family_t))
+#define _SS_PAD2SIZE    (_SS_MAXSIZE - sizeof(u_char) - sizeof(sa_family_t) - \
+                                _SS_PAD1SIZE - _SS_ALIGNSIZE)
+
+struct sockaddr_storage {
+        u_char          ss_len;         /* address length */
+        sa_family_t     ss_family;      /* address family */
+        char            __ss_pad1[_SS_PAD1SIZE];
+        int64_t         __ss_align;     /* force desired structure storage alignment */
+        char            __ss_pad2[_SS_PAD2SIZE];
+};
+
 #endif /* _ZEBRA_SOCKUNION_H */