Re: dns->tcp/ip->ethernet

Florian Heinz (sky@skyper.tmag.de)
Fri, 01 Oct 1999 13:44:11 +0200

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Hi,
> I developing a Real-Time network protocol to work under Linux
> ipv4. In the first phase of the project I took only the hardware
> addresses to make the connections between PC's for not to worry about
> the TCP and IP stuff and socket implementation, just for testing
> purposes. My idea is to come up with a user level real-time socket
> implementation and now I am in the process of reading the TCP/IP code to
> find where the hostnames turn into TCP and IP addresses and finally where
The kernel-networkcode doesn't care about hostnames... That's done in
userspace (gethostbyname is a library-function, not a syscall)

> these turn into hardware addresses. I would like my protocol to work in
> an environment in which TCP/IP is operating.
>
> I have found arp_find() and other functions that seems to look at the
> route table and obtain the hardware addresses, but they are so inmersed
> into the design of the TCP/IP that I have not clear idea how to use them.
Agree! I'm seeking myself for a way to send "hand-made" tcp/ip-packets
without having to care about the datalink-level-headers... This part has
changed since 2.0.x and now I'm _really_ stuck...

Florian

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Next message: Andreas Schuldei: "Re: "1024 Sockets per process" or "TIME WAIT without an ending""
Previous message: Daniele Bernardini: "problems with 3c900 vortex"
Maybe in reply to: Axel Bernal: "dns->tcp/ip->ethernet"