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Comment the interface to ether_input() and the way is normally

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used by most ethernet drivers.
This commit is contained in:
Luigi Rizzo 2001-01-25 23:56:13 +00:00
parent f59091e7cd
commit 02a282ac01
1 changed files with 9 additions and 0 deletions
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9
sys/net/if_ethersubr.c
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@ -390,6 +390,15 @@ ether_output_frame(ifp, m)
* the packet is in the mbuf chain m without
* the ether header, which is provided separately.
*
* NOTA BENE: for many drivers "eh" is a pointer into the first mbuf or
* cluster, right before m_data. So be very careful when working on m,
* as you could destroy *eh !!
* A (probably) more convenient and efficient interface to ether_input
* is to have the whole packet (with the ethernet header) into the mbuf:
* modules which do not need the ethernet header can easily drop it, while
* others (most noticeably bridge and ng_ether) do not need to do additional
* work to put the ethernet header back into the mbuf.
*
* First we perform any link layer operations, then continue
* to the upper layers with ether_demux().
*/