--- Begin Message ---
- From: "Sébastien COURET" <sebastien dot couret at elios-informatique dot fr>
- To: <ecos-discuss-owner at sources dot redhat dot com>
- Date: Wed, 19 Nov 2003 20:06:13 +0100
- Subject: TR : Sending Raw Ethernet packets (ether_output, ether_output_frame, __enet_send ?)
- Delivery-date: Wed, 19 Nov 2003 19:07:52 +0000
- Envelope-to: jiflsw@jifvik.org
Hello,
I?m on my way to write a DHCP server for eCOS, but right now i?m stuck
while trying to send an ethernet packet directly to an host (my DHCP
client) which has, at first, only ethernet connectivity and is only
reachable through network via its MAC address(Let?s call it
0xde:0xad:0x00:0xbe:0xef:0x00) because IP adressing is not set.
I have choosed to use the FreeBSD TCP/IP stack port for eCOS.
And when trying to send such a packet with socket API and parameters
PF_INET,SOCK_RAW, i?m not able to act on the ethernet header so , I
cannot make ethernet destination adress point to
0xde:0xad:0x00:0xbe:0xef:0x00 and sendto() seems to only accept
sockaddr_in targets.
So i have seek a another raw API to write ethernet packets directly .
(Of course this API should be generic and not driver dependent )
I have found ether_output, ether_output_frame, __enet_send but I cannot
use them from my application because they are not compiled into the eCOS
library , I have generated, and the linkage fails ...
May be , I don?t take the right approach... It should be simple ...
So to resume, my question is :
Could someone tell me how (a code example would be perfect !) , I could
act , from my eCOS application , onto the ethernet header of a packet
I?m going to send ? (In my case, I just which to change the destination
MAC address)
Thanks a lot for your help.
Have a nice day.
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--- End Message ---