RTN代表什么是RTN_LOCAL？

Question

我对RTN_LOCAL的名称感到困惑。

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内核的很多地方都有用。

1. inet_addr_type（）的返回值。

2.route类型的fib_alias-＆gt; fatype。

3. fib_rule-> action的动作值。