netdev - Re: Is this 32-bit NCM?

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Message-ID: <A6FB85DC-A033-439B-A814-1515380F6F6A@audiocodes.com>
Date:	Tue, 2 Dec 2014 07:11:32 +0000
From:	Eli Britstein <Eli.Britstein@...iocodes.com>
To:	Kevin Zhu <Mingying.Zhu@...iocodes.com>
CC:	Enrico Mioso <mrkiko.rs@...il.com>,
	Bjørn Mork <bjorn@...k.no>,
	Alex Strizhevsky <alexxst@...il.com>,
	"Midge Shaojun Tan" <ShaojunMidge.Tan@...iocodes.com>,
	"youtux@...il.com" <youtux@...il.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Is this 32-bit NCM?

Maybe the FW expects some kind of checksum or crc in the padding area?

Sent from my iPhone

> On 2 בדצמ 2014, at 08:52, "Kevin Zhu" <Mingying.Zhu@...iocodes.com> wrote:
>
> OK. I will look at the windows driver and registry. I don't have any
> manual of it.
>
> Regards,
> Kevin
>
>> On 12/02/2014 02:49 PM, Enrico Mioso wrote:
>> Can you try to look at Windows registry keys based on the INF file as suggested
>> or would this be a problem for you?
>> And... if you have any Huawei manutal talking about it: even device's
>> ^DSFLOWRPT
>> might be useful to some extent, but ... this is only just a note in case we
>> don't find anything else.
>> Regards ... and good day to all of you,
>> Enrico
>>
>>
>> On Tue, 2 Dec 2014, Kevin Zhu wrote:
>>
>> ==Date: Tue, 2 Dec 2014 07:43:24
>> ==From: Kevin Zhu <Mingying.Zhu@...iocodes.com>
>> ==To: Enrico Mioso <mrkiko.rs@...il.com>
>> ==Cc: Eli Britstein <Eli.Britstein@...iocodes.com>, Bjørn Mork <bjorn@...k.no>,
>> ==    Alex Strizhevsky <alexxst@...il.com>,
>> ==    Midge Shaojun  Tan <ShaojunMidge.Tan@...iocodes.com>,
>> ==    "youtux@...il.com" <youtux@...il.com>,
>> ==    "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
>> ==    "netdev@...r.kernel.org" <netdev@...r.kernel.org>
>> ==Subject: Re: Is this 32-bit NCM?
>> ==
>> ==I also tried to define CDC_NCM_DPT_DATAGRAMS_MAX as 1 to eliminate the
>> ==paddings, but it did not work either, not even DHCP.
>> ==
>> ==Regards,
>> ==Kevin
>> ==
>> ==On 12/02/2014 02:32 PM, Enrico Mioso wrote:
>> ==> Hi again Eli,
>> ==> Hi Kevin,
>> ==> Hi everyone...
>> ==>
>> ==> As I understand it anyway - the distinction here tends not to be between
>> ==> different types of packets.
>> ==> It tends to be between received and sent packet.
>> ==> We are not able to generate packets that the device retains valid.
>> ==> If you manually configure the IP the device would have assigned you via DHCP,
>> ==> your system will start answering ARP request, saying that the host with IP
>> ==> aa.bb.cc.dd is at aa:bb:cc:dd:ee (using the MC address of the dongle).
>> ==> However, the other host (gateway) will never know that. Indeed, it'll continue
>> ==> asking who-is at aa.bb.cc.dd ?
>> ==> At least, this is the situation I observed in the test system.
>> ==>
>> ==>
>> ==> On Tue, 2 Dec 2014, Kevin Zhu wrote:
>> ==>
>> ==> ==Date: Tue, 2 Dec 2014 04:53:53
>> ==> ==From: Kevin Zhu <Mingying.Zhu@...iocodes.com>
>> ==> ==To: Eli Britstein <Eli.Britstein@...iocodes.com>,
>> ==> ==    Enrico Mioso <mrkiko.rs@...il.com>
>> ==> ==Cc: Bjørn Mork <bjorn@...k.no>, Alex Strizhevsky <alexxst@...il.com>,
>> ==> ==    Midge Shaojun  Tan <ShaojunMidge.Tan@...iocodes.com>,
>> ==> ==    "youtux@...il.com" <youtux@...il.com>,
>> ==> ==    "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
>> ==> ==    "netdev@...r.kernel.org" <netdev@...r.kernel.org>
>> ==> ==Subject: Re: Is this 32-bit NCM?
>> ==> ==
>> ==> ==Hi,
>> ==> ==
>> ==> ==The DHCP packets have the maximum size of dwNtbOutMaxSize=16384, while
>> ==> ==the other packets are less than that. However, the DHCP queries are not
>> ==> ==replied in time either, there's always some delay.
>> ==> ==
>> ==> ==By the way, though the device claims to support GET_MAX_DATAGRAM_SIZE,
>> ==> ==but it returns error when the host sends this command to it. I disabled
>> ==> ==this command in NCM driver and tried, but it's the same result.
>> ==> ==
>> ==> ==Regards,
>> ==> ==Kevin
>> ==> ==
>> ==> ==On 12/02/2014 06:02 AM, Eli Britstein wrote:
>> ==> ==> Hi Enrico and all,
>> ==> ==>
>> ==> ==> Maybe I missed something but what is the difference by the driver point of view between the dhcp discover and request (that are ok) to others (like arp, that is nok)?
>> ==> ==> Maybe we can trace to compare them?
>> ==> ==>
>> ==> ==> Sent from my iPhone
>> ==> ==>
>> ==> ==>> On 1 בדצמ 2014, at 23:11, "Enrico Mioso" <mrkiko.rs@...il.com> wrote:
>> ==> ==>>
>> ==> ==>> So ... I have two ideas left for now.
>> ==> ==>> We know for sure the problem is in the way we TX frames, not the way we RX them
>> ==> ==>> (the way we send, generate them, not the way we receive them).
>> ==> ==>> Si I have two ideas, and I ask for help from the Linux-usb mailing list for
>> ==> ==>> this first one.
>> ==> ==>>
>> ==> ==>> 1 - Does a wayexist to "replay" traffic crom a usb capture?
>> ==> ==>> We might try to take the usb frames generated by Windows, and send them to the
>> ==> ==>> device to see if there is any reaction. It should not be science fiction, I saw
>> ==> ==>> them do that in the eciadsl old project.
>> ==> ==>> 2 - The huawei ndis driver: does it work with these devices?
>> ==> ==>> It should be a little bit out-dated now (at least in terms of dates, it might
>> ==> ==>> work as well): the code is A LOT but, just in case, to see if there is any
>> ==> ==>> chances it'll work. It remains to be seen in which kernels it can actually
>> ==> ==>> compile again.
>> ==> ==>>
>> ==> ==>> If this works we might analyse what's happening and try to debug this out.
>> ==> ==>> But I really would like this to work in the cdc_ncm driver + huawei_cdc_ncm.
>> ==> ==>> Thank you.
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