Hello,
After your comment I checked p->tot_len in low_level_output function and I
get the 590 value but p->len = 136 byte.
How can I solve this problem?
Best regards.
Duygu D. <duygudemirpe...@gmail.com>, 1 Eki 2021 Cum, 17:13 tarihinde şunu
yazdı:
> And I've same problem again.
>
> Duygu D. <duygudemirpe...@gmail.com>, 1 Eki 2021 Cum, 17:12 tarihinde
> şunu yazdı:
>
>> Hello,
>> I download lwip 2.1.2 (last version) in here. Replace with my lwip files.
>> And I added my lwipopt.h, and user_config.h file.
>>
>>
>> Duygu D. <duygudemirpe...@gmail.com>, 1 Eki 2021 Cum, 16:36 tarihinde
>> şunu yazdı:
>>
>>> Hello,
>>> Thank you for your reply.
>>> I couldnt find anywhere p->len is 576, I checked mbedtls's bio_send
>>> function I see 136 bytes. I dont know 576 where come from.
>>> I am a new developper so how can I analyse this "Or your driver might be
>>> sending zero-copy but the packets get changed
>>> between being enqueued and actually sending them" sorry for my ignorance
>>> Best Regards.
>>>
>>> goldsi...@gmx.de <goldsi...@gmx.de>, 1 Eki 2021 Cum, 15:42 tarihinde
>>> şunu yazdı:
>>>
>>>> Am 01.10.2021 um 13:40 schrieb Duygu D.:
>>>> > [..]
>>>> > When I checked the low_level_output functions I get sending data bytes
>>>> > 150 byte but Ipv4 length shows us 576 byte, opt.h file set as default
>>>> > but if I changed TCP_MSS as a 250 byte so I can send 136 byte and Ipv4
>>>> > packet lenght shows me 136. But does not make sense. I couldnt do
>>>> > successful handshaking. Lwip takes care of the IP part if I send the
>>>> > another IP based packet (like icmp) packet with different sizes. I
>>>> didnt
>>>> > get IPv4 packet length error.
>>>> > I only have this error when I used mbedtls. How can I find the
>>>> problem?
>>>>
>>>> One error I can think of here is that your driver might send packets
>>>> using 'p->len' instead of iterating over all pbufs ('p->tot_len',
>>>> iterate over all 'p->next').
>>>>
>>>> Or your driver might be sending zero-copy but the packets get changed
>>>> between being enqueued and actually sending them?
>>>>
>>>> Regards,
>>>> Simon
>>>>
>>>> _______________________________________________
>>>> lwip-users mailing list
>>>> lwip-users@nongnu.org
>>>> https://lists.nongnu.org/mailman/listinfo/lwip-users
>>>
>>>
>>>
>>> --
>>> Embeded System Engineer
>>>
>>>
>>
>> --
>> Embeded System Engineer
>>
>>
>
> --
> Embeded System Engineer
>
>
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