From: Sergei Shtylyov <sergei.shtylyov@gmail.com>
To: Yves-Alexis Perez <corsac@corsac.net>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Martin Habets <mhabets@solarflare.com>,
Luc Van Oostenryck <luc.vanoostenryck@gmail.com>,
Shannon Nelson <snelson@pensando.io>,
"Michael S. Tsirkin" <mst@redhat.com>,
linux-usb@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Matti Vuorela <matti.vuorela@bitfactor.fi>, stable@vger.kernel.org
Subject: Re: [PATCH] usbnet: ipheth: fix connectivity with iOS 14
Date: Fri, 20 Nov 2020 12:15:24 +0300 [thread overview]
Message-ID: <22d938ab-babc-815a-f635-5025e871cf62@gmail.com> (raw)
In-Reply-To: <20201119172439.94988-1-corsac@corsac.net>
Hello!
On 19.11.2020 20:24, Yves-Alexis Perez wrote:
> Starting with iOS 14 released in September 2020, connectivity using the
> personal hotspot USB tethering function of iOS devices is broken.
>
> Communication between the host and the device (for example ICMP traffic
> or DNS resolution using the DNS service running in the device itself)
> works fine, but communication to endpoints further away doesn't work.
>
> Investigation on the matter shows that UDP and ICMP traffic from the
^ "no" missing?
> tethered host is reaching the Internet at all. For TCP traffic there are
> exchanges between tethered host and server but packets are modified in
> transit leading to impossible communication.
>
> After some trials Matti Vuorela discovered that reducing the URB buffer
> size by two bytes restored the previous behavior. While a better
> solution might exist to fix the issue, since the protocol is not
> publicly documented and considering the small size of the fix, let's do
> that.
>
> Tested-by: Matti Vuorela <matti.vuorela@bitfactor.fi>
> Signed-off-by: Yves-Alexis Perez <corsac@corsac.net>
> Link: https://lore.kernel.org/linux-usb/CAAn0qaXmysJ9vx3ZEMkViv_B19ju-_ExN8Yn_uSefxpjS6g4Lw@mail.gmail.com/
> Link: https://github.com/libimobiledevice/libimobiledevice/issues/1038
> Cc: stable@vger.kernel.org
[...]
MBR, Sergei
next prev parent reply other threads:[~2020-11-20 9:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-27 14:14 /net/usb/ipheth.c incompatibility with Apple iOS 14 Kiran
2020-09-28 17:50 ` Greg KH
2020-10-11 9:12 ` Yves-Alexis Perez
2020-11-19 17:24 ` [PATCH] usbnet: ipheth: fix connectivity with " Yves-Alexis Perez
2020-11-20 9:15 ` Sergei Shtylyov [this message]
2020-11-20 16:56 ` Yves-Alexis Perez
2020-11-21 22:03 ` Jakub Kicinski
2020-11-24 10:41 ` Yves-Alexis Perez
2020-11-24 16:39 ` Jakub Kicinski
2021-02-21 10:42 Sam Bingner
2021-02-22 12:09 ` Oliver Neukum
2021-09-22 20:11 ` Sam Bingner
2021-09-27 14:51 ` Yves-Alexis Perez
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