Receive a packet from L2 header using socket

murugan86 · 03-26-2009, 01:30 AM

Hi,

I am figuring out a method to receive UDP packet belonging to a particular port from L2 header using sockets in Linux.

One method is by useing AF_INET/SOCK_RAW method, but i am not sure about how to configure socket call to receive udp stream belonging to one particular port.

another method is using normal UDP socket and use any advanced options to receive packet from L2 header. But will it be possible?

Do i need to use some other method other than sockets to do so?

Any suggestion or pointer is welcomed.

murugan

theNbomr · 03-26-2009, 10:48 PM

If you use SOCK_RAW (and I believe that you will need to), you bind your socket to an interface, and thus receive all traffic that has a the interface's MAC as a destination address, or is a broadcast packet. This includes IP and non-IP traffic. SOCK_RAW requires root privileges.
--- rod.