[so2] [ixia challenge]transmitere pachete

[Alexandru Preda]

Salutare,

Codul sursa din qemu aferent placii [1] e gresit fatal (cel putin) in ce
priveste modul simplificat de transmisie. Baietii de la MIT aparent au
rezolvat bugul prin patch-ul lor [2].

Ramane sa implementam obligatoriu modul flexibil sau vom avea ... patchul
... nevermind... Facem modul flexibil.

PS: scuze pentru rich text si top posting

[1] http://git.qemu.org/?p=qemu.git;a=blob;f=hw/net/eepro100.c
[2] http://pdos.csail.mit.edu/6.828/2009/labs/lab6/qemu-0.10.6-e100.patch

Alex


2014-03-22 19:20 GMT+02:00 Gucea Doru <gucea.doru at gmail.com>:

> <daniel.baluta at gmail.com>:
>
>
> > Printeaza skb->data octet cu octet si vezi daca seamana cu ce trimiti.
>
> Nu seaman cu ce trimit pentru ca pachetul tcpdump arata ca la [1]( deci
> gol?) pe cand in sk->data am cate ceva in octetii aceia.
>
> E posibil ca adresa DMA pe care o furnizez catre CU sa fie gresita insa nu
> ar fi trebui sa dea un kernel oops daca era incorecta, (mai ales ca am
> alocat 100 de TCB-uri) ? Adresa dma o obtin utilizand functia
>
> cpu_addr = pci_pool_alloc(pool, flags, &dma_handle), pe care o scriu in scb general pointer.
>
>
> Multumesc,
> Doru
>
> [1] http://pastebin.com/a5a1VqBk
>
>
> 2014-03-22 10:02 GMT-07:00 Gucea Doru <gucea.doru at gmail.com>:
>
> <daniel.baluta at gmail.com>:
>>
>> > 2) E buna varianta cu MAC-ul programatic, daca-l citesti inapoi e
>> corect? Apare
>> > MAC-ul in output-ul lui ip address show dev ixeth0?
>>
>> Dap, apare.
>>
>>
>>
>> 2014-03-22 9:52 GMT-07:00 Daniel Baluta <daniel.baluta at gmail.com>:
>>
>> 2014-03-22 18:50 GMT+02:00 Gucea Doru <gucea.doru at gmail.com>:
>>> > 1)da, tap e in masina fizica
>>> > 2)am setat macaddr programatic, insa incerc si varianta propusa de tine
>>> > 3) testez varianta 3 sa vad ce obtin
>>>
>>> Foloseste te rog bottom posting -
>>> http://en.wikipedia.org/wiki/Posting_style#Bottom-posting
>>>
>>> 2) E buna varianta cu MAC-ul programatic, daca-l citesti inapoi e
>>> corect? Apare
>>> MAC-ul in output-ul lui ip address show dev ixeth0?
>>>
>>> thanks,
>>> Daniel.
>>> _______________________________________________
>>> http://ocw.cs.pub.ro/courses/so2/resurse/lista-discutii
>>
>>
>>
>
> _______________________________________________
> http://ocw.cs.pub.ro/courses/so2/resurse/lista-discutii
>
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