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From: "Montorsi, Francesco" <fmontorsi@empirix.com>
To: "dev@dpdk.org" <dev@dpdk.org>
Subject: [dpdk-dev] where to find ethernet CRC when stripping is off
Date: Wed, 20 Jan 2016 15:02:11 +0000	[thread overview]
Message-ID: <30b91c74ca26434daac041713cffa153@bilemail1.empirix.com> (raw)

Hi all,

I need to get access to the Ethernet CRC of received packets.
To do this, I'm configuring:

port_conf.rxmode.hw_strip_crc = 0;

Now my question is: how am I supposed to access the Ethernet CRC from a DPDK mbuf? 
Is the CRC just the 4 final bytes of the packets? 

Is this correct:

   uint32_t crc = rte_pktmbuf_mtod_offset (mymbuf, uint32_t*, mymbuf->pkt_len) ;

?

Thanks,
Francesco Montorsi

             reply	other threads:[~2016-01-20 15:02 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-20 15:02 Montorsi, Francesco [this message]
2016-01-20 15:49 ` Ivan Boule
2016-01-20 17:15   ` Montorsi, Francesco
2016-01-21  8:49     ` Ivan Boule

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