[gPXE] question about packages transmission

[Stefan Hajnoczi]

On Fri, Feb 19, 2010 at 7:46 AM, Simon POULLEAU
<simon.poulleau at ensimag.imag.fr> wrote:
> I'm a beginner with gPXE and I try to understand the process of packages
> transmission. But I didn't find answers.
>
> I would like to know how the transmissions between HTTP server, DHCP
> server, gPXE and DNS are carried out during a boot.

I am not sure exactly what you are asking.

Network protocol code (HTTP, DHCP, DNS) is in gpxe/src/net.  This also
includes the TCP/IP stack.

Network driver code for hardware devices is in gpxe/src/drivers/net
and gpxe/src/arch/i386/drivers/net.

For example, the HTTP code has an struct xfer_interface which allows
it to send packets through a TCP connection to the web server.  The
TCP/IP stack fills in packet headers and passes the struct io_buffer
to the network interface.  The driver takes the struct io_buffer and
notifies the hardware to send the packet.

Is this what you were looking for?

Stefan