如果没有设置BLOADCASE选项的不递送。

如果bind端口不匹配不递送该套接口

如果绑定的不是INADDR_ANY话,那么BIND的地址和目的地址匹配才能递送:也就是说你必须BIND一个广播地址或者绑定INADDR_ANY



用ifconfig命令可以disable块网卡的BROADCAST标志，让其不能接受以太网广播。



也可以使用ioctl的SIOCSIFFLAGS方法去掉一个接口的标志IFF_BROADCAST，使之不能接受以太网广播。-If the option is not set BLOADCASE not delivered. If the port does not match does not bind the socket if delivery is not bound to INADDR_ANY, then the BIND destination address matches the address and can be delivered: that you have a broadcast address or BIND bind INADDR_ANY block with the ifconfig command to disable the network card BROADCAST flag, let it not accept the Ethernet broadcast. You can also use ioctl' s SIOCSIFFLAGS method to remove an interface symbol IFF_BROADCAST, so they can not accept the Ethernet broadcast.