Seong Moon wrote:
In Layer 3 Protocols(eg. IP, IPv6, ...),
they calls dev_queue_xmit() to send their data.
Before calling dev_queue_xmit(),
does the layer 3 protocols always call dev->hard_header ?
Actually, I'm not sure when dev->hard_header is called.
I think dev->hard_start_xmit can include the part of dev->hard_header.
Why did the developer seperate the header building and sending frame
fucntion ?
It's not always called, this way user-space (or other parts of the kernel)
can build the headers if desired. This at least works for ethernet and
VLAN interfaces.
Ben
thanks in advance.
--
Ben Greear <greearb@xxxxxxxxxxxxxxx> <Ben_Greear AT excite.com>
President of Candela Technologies Inc http://www.candelatech.com
ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear
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