+#define sk_set_frozen(s, is_frozen) (((*s)->set_frozen) (s, is_frozen))
+
+/*
+ * Call this after an operation that might have tried to send on a
+ * socket, to clean up any pending network errors.
+ */
+void net_pending_errors(void);
+
+/*
+ * Simple wrapper on getservbyname(), needed by ssh.c. Returns the
+ * port number, in host byte order (suitable for printf and so on).
+ * Returns 0 on failure. Any platform not supporting getservbyname
+ * can just return 0 - this function is not required to handle
+ * numeric port specifications.
+ */
+int net_service_lookup(char *service);