+#ifdef IPV6_SUPPORTED
+static void
+present_address(const struct sockaddr *sap, char *buf, const size_t buflen)
+{
+ const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
+ const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sap;
+ socklen_t len = (socklen_t)buflen;
+
+ switch (sap->sa_family) {
+ case AF_INET:
+ if (inet_ntop(AF_INET, &sin->sin_addr, buf, len) != 0)
+ return;
+ case AF_INET6:
+ if (inet_ntop(AF_INET6, &sin6->sin6_addr, buf, len) != 0)
+ return;
+ }
+
+ memset(buf, 0, buflen);
+ strncpy(buf, "unrecognized caller", buflen);
+}
+#else /* !IPV6_SUPPORTED */
+static void
+present_address(const struct sockaddr *sap, char *buf, const size_t buflen)
+{
+ const struct sockaddr_in *sin = (const struct sockaddr_in *)sap;
+ socklen_t len = (socklen_t)buflen;
+
+ if (sap->sa_family == AF_INET)
+ if (inet_ntop(AF_INET, &sin->sin_addr, buf, len) != 0)
+ return;
+
+ memset(buf, 0, buflen);
+ strncpy(buf, "unrecognized caller", (size_t)buflen);
+}
+#endif /* !IPV6_SUPPORTED */
+