+/*********************************************************************
+ *
+ * Function : host_is_ip_address
+ *
+ * Description : Checks whether or not a host is specified by
+ * IP address. Does not actually validate the
+ * address.
+ *
+ * Parameters :
+ * 1 : host = The host name to check
+ *
+ * Returns : 1 => Yes
+ * 0 => No
+ *
+ *********************************************************************/
+extern int host_is_ip_address(const char *host)
+{
+ const char *p;
+
+ if (NULL != strstr(host, ":"))
+ {
+ /* Assume an IPv6 address. */
+ return 1;
+ }
+
+ for (p = host; *p; p++)
+ {
+ if ((*p != '.') && !privoxy_isdigit(*p))
+ {
+ /* Not a dot or digit so it can't be an IPv4 address. */
+ return 0;
+ }
+ }
+
+ /*
+ * Host only consists of dots and digits so
+ * assume that is an IPv4 address.
+ */
+ return 1;
+
+}
+
+