On 16 March 2017 at 18:03, Nanda Gopal <nandana...@gmail.com> wrote:
> Hi Shally,
>
> Yes, I meant Segmented packets.
>
> I am facing the issue when I try to read the Next Header from the ESP
> trailer.
> My assumption would be that the end of packet would be l3 ptr + ip->
> tot_len.
> From this , I would do go back by 1 byte to the ESP trailer ( Something
> like =>odph_esptrl_t *esp_t = (odph_esptrl_t *)(eop) - 1; )
> When I try to access the next_header in the ESP trailer, I get some
> arbitrary value but not ODPH_IPV4.
> Would segmented packets need to be handled specially?
>
odp_packet_t could be internally implemented using segments and it could be
stored either as linked list or scatter gather based on the implementation.
Your approach will work only if the packet is not segmented and it will not
work for segmented packets.
you have to use packet segment APIs documented in packet.h file to access
the packet.
Regards,
Bala
>
> Regards,
> {Nanda]
>
>
>
> On Thu, 16 Mar 2017 at 15:51 Verma, Shally <shally.ve...@cavium.com>
> wrote:
>
>> Have a question by chained , do you mean a "Segmented" packets?
>>
>> -----Original Message-----
>> From: lng-odp [mailto:lng-odp-boun...@lists.linaro.org] On Behalf Of
>> Bala Manoharan
>> Sent: 16 March 2017 14:01
>> To: Nanda Gopal <nandana...@gmail.com>
>> Cc: lng-odp-forward <lng-odp@lists.linaro.org>
>> Subject: Re: [lng-odp] Regarding Chained Buffers and Crypto
>>
>> On 15 March 2017 at 18:42, Nanda Gopal <nandana...@gmail.com> wrote:
>>
>> > *Hi,*
>> >
>> >
>> >
>> > *When we pass, odp_crypto_op_params_t params to
>> odp_crypto_operation
>> > (), as per the documentation, if we set params-> out_pkt to INVALID, a
>> > new pkt would be created from the original pkt pool, data copied from
>> > original pkt and then passed on to DPDK. *
>> >
>> > *In our test case, we are passing a chained buffer to this crypto API,
>> > so in order for send the same buffer to lower layer without a copy,
>> > are there any flags to be set? *
>> >
>>
>> If your requirement is to support in-place crypto processing you can
>> specify the output packet as same as input packet (i.e out_pkt = pkt).
>>
>> Regards,
>> Bala
>>
>> >
>> >
>> > *Regards,*
>> >
>> > *Nanda*
>> >
>>
>
