netdev - Re: Is this 32-bit NCM?

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Message-ID: <547D61C0.2080904@audiocodes.com>
Date:	Tue, 2 Dec 2014 06:52:54 +0000
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?

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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