[syslinux] Blocked Network Interrupt for COM32 Programs

[H. Peter Anvin]

On 08/29/2011 11:00 PM, Madhusudan M.I wrote:
> I have written a COM32 program which pxelinux loads it and executes when
> machine is booted over network. And the COM32 program should be blocked till
> it receives an instruction from deployment server in UDP packet.
> 
> I am looking for a network interrupt that will make my machine to wait for
> an incoming udp packet, so that my server can send udp packet, and
> reboot/shutdown  the machine.
> 
> I would appreciate if anyone can point me to the network interrupt that
> blocks my COM32 process until a packet arrives in NIC, so that COM32 reads
> UDP packet and carryout appropriate operation.

There isn't one.  You have to call the PXE UDP receive interrupt
repeatedly until your packet arrives.

	-hpa