* question about PKT_RX_IPV4_HDR_EXT
@ 2013-12-26 21:46 Wang, Shawn
[not found] ` <CEE1E3CB.41AA0%xingbow-vV1OtcyAfmbQT0dZR+AlfA@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Wang, Shawn @ 2013-12-26 21:46 UTC (permalink / raw)
To: dev-VfR2kkLFssw@public.gmane.org
Hi:
Can anyone explain more details about the rte_mbuf ol_flag : PKT_RX_IPV4_HDR_EXT?
The document said “RX packet with extended IPv4 header.”
But what is the extended IPv4 header looks like? What is the difference with normal IPv4 header?
Can anyone give me an example?
Thanks a lot.
Wang, Shawn
^ permalink raw reply [flat|nested] 2+ messages in thread[parent not found: <CEE1E3CB.41AA0%xingbow-vV1OtcyAfmbQT0dZR+AlfA@public.gmane.org>]
* Re: question about PKT_RX_IPV4_HDR_EXT [not found] ` <CEE1E3CB.41AA0%xingbow-vV1OtcyAfmbQT0dZR+AlfA@public.gmane.org> @ 2014-01-06 15:27 ` Ivan Boule 0 siblings, 0 replies; 2+ messages in thread From: Ivan Boule @ 2014-01-06 15:27 UTC (permalink / raw) To: Wang, Shawn; +Cc: dev-VfR2kkLFssw@public.gmane.org On 12/26/2013 10:46 PM, Wang, Shawn wrote: > Hi: > > Can anyone explain more details about the rte_mbuf ol_flag : PKT_RX_IPV4_HDR_EXT? > The document said “RX packet with extended IPv4 header.” > But what is the extended IPv4 header looks like? What is the difference with normal IPv4 header? > Can anyone give me an example? > > Thanks a lot. > Wang, Shawn Hi, A extended IPv4 header is a IPv4 header with additional options, whose total header size is greater than 20 bytes. Intel 1GbE and 10Gbe Ethernet controllers are able to recognize such packets, and, in this case,set a dedicated flag into the RX descriptor where they store the packet. Then, to supply this hardware-detected packet characteristics to the upper-level application, the RX functions of DPDK PollMode Drivers of the 1GbE and 10Gbe Ethernet controllers set the PKT_RX_IPV4_HDR_EXT generic flag into the mbuf that contains the packet. Best regards, Ivan -- Ivan Boule 6WIND Development Engineer ^ permalink raw reply [flat|nested] 2+ messages in thread
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2013-12-26 21:46 question about PKT_RX_IPV4_HDR_EXT Wang, Shawn
[not found] ` <CEE1E3CB.41AA0%xingbow-vV1OtcyAfmbQT0dZR+AlfA@public.gmane.org>
2014-01-06 15:27 ` Ivan Boule
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