无法广播以C语言工作

Question

I used the broadcaster.c from Beej's Guide to Network Programing as well as the listner.c but am unable to make have a Broadcast packet send to the server. I have checked in Wireshark and it does send. But I cannot get the listener to receive the connection. It only seems to work for localhost and 192.168.1.56 and not for 255.255.255.255 or 192.168.1.255.

Answer 1

If you bound the socket to the broadcast address (either manually or INADDR_BROADCAST ) or INADDR_ANY on the server part, then it would receive the broadcast, otherwise Linux will not receive the packets.

Btw, routers do not forward 255.255.255.255 broadcast. Therefore, don't use it on the infrastracture mode.