Hi all,
i am trying to create a module that will receive frames from a physical
interface, using a packet handler registered via dev_add_pack, mangle
the frame content and send it over a UDP socket. To transmit over UDP I
created a socket and I am sending the frame using sock_sendmsg. It is
mostly working except that I am getting some error and, above all, the
kernel is crashing :-(
The error message that I get the most is "scheduling while atomic". This
leads me to believe that sock_sendmsg cannot be used while in softirq
context, which, as per my understanding, is the context when the packet
handlers are called.
So, I am a little puzzled as to what are my options. Should I use some
queuing and then dispatch something that will execute in the proper
context? Or try to find a lower entry point into UDP that would work in
softirq context? Any suggestions?
Thanks
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