kernel - RTN_LOCAL 中的 RTN 缩写是什么？

Question

我真的对 RTN_LOCAL 的名称感到困惑。

它在 linux/rtnetlink.h 中定义

enum {
RTN_UNSPEC,
RTN_UNICAST,        /* Gateway or direct route  */
RTN_LOCAL,      /* Accept locally       */
RTN_BROADCAST,      /* Accept locally as broadcast,
               send as broadcast */
RTN_ANYCAST,        /* Accept locally as broadcast,
               but send as unicast */
RTN_MULTICAST,      /* Multicast route      */
RTN_BLACKHOLE,      /* Drop             */
RTN_UNREACHABLE,    /* Destination is unreachable   */
RTN_PROHIBIT,       /* Administratively prohibited  */
RTN_THROW,      /* Not in this table        */
RTN_NAT,        /* Translate this address   */
RTN_XRESOLVE,       /* Use external resolver    */
__RTN_MAX

};

我发现它在Linux内核的许多地方都使用过。

1.inet_addr_type()的返回值。

2.fib_alias->fatype的路由类型值。

3.fib_rule->action的action值。