names=IP_ROUTER_ALERT
visibility=public
kind=defined

--- IP_ROUTER_ALERT -> Integer
Notify transit routers to more closely examine the contents of an IP packet。
[[m:BasicSocket#getsockopt]], [[m:BasicSocket#setsockopt]]
の第2引数(optname)に使用します。

@see [[m:Socket::Constants::IPPROTO_IP]], [[man:ip(7linux)]]

