第411行调用的是neigh_resolve_output,该函数是通过路由表查到的,不论硬件支不支持硬件头缓存,neigh_resolve_output都会被调用到,它来源如下: staticconststructneigh_ops arp_generic_ops = { .family = AF_INET, .solicit = arp_solicit, .error_report =arp_error_report, .output = neigh_resolve_output,...