On Thu, 19 Nov 2020 18:24:39 +0100 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 > 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@xxxxxxxxxxxx> > Signed-off-by: Yves-Alexis Perez <corsac@xxxxxxxxxx> > Link: https://lore.kernel.org/linux-usb/CAAn0qaXmysJ9vx3ZEMkViv_B19ju-_ExN8Yn_uSefxpjS6g4Lw@xxxxxxxxxxxxxx/ > Link: https://github.com/libimobiledevice/libimobiledevice/issues/1038 Applied to net with the typo fixed, thanks!
