Re: HELP: Linux Net Driver confusions

Re: HELP: Linux Net Driver confusions

[Tom Roberts]

Tom Roberts wrote:
> I am trying to write a network driver [...]
> In particular, I am trying to use non-ethernet headers, and cannot
> get the kernel to deliver a ping packet (ICMP protocol) back to the
> ping program even though the driver delivers the packets OK. BUT --
> essentially the same driver does seem to work on PowerPC linux....

Thanks to Jonathan Brauer, I got it to work.

Remarkably, the value in skb->protocol is in network byte order,
not the natural byte order of the current CPU. So changing:
	skb->protocol = ETH_P_IP;
to:
	skb->protocol = htons(ETH_P_IP);
made it work.

Note that the PowerPC byte order is the same as network order,
which is why it worked on the PowerPC but not the i586.

	[sent to both c.o.l.dev.sys and linuxppc-embedded
	 because I queried both.]


Tom Roberts	tjroberts@lucent.com

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Re: HELP: Linux Net Driver confusions

[Dan Malek]

Tom Roberts wrote:

> Note that the PowerPC byte order is the same as network order,
> which is why it worked on the PowerPC but not the i586.

Damn!  Darwin keeps letting me down.  Those wrong byte order
things just keep surviving.  You had it working and should have just
continued down the path of happiness.......:-).


	-- Dan

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