Fwd: Delivery Status Notification (Failure)

Gucea Doru gucea.doru at gmail.com
Sun Aug 9 10:26:07 PDT 2015

---------- Forwarded message ----------
From: Mail Delivery Subsystem <mailer-daemon at googlemail.com>
Date: Sun, Aug 9, 2015 at 5:23 PM
Subject: Delivery Status Notification (Failure)
To: gucea.doru at gmail.com

Hello, Eugene

I read the posts from this forum and I noticed that some of the subjects
focused on the WCN3660 WiFi chip which is also available on the LG Nexus 4.

Do you know if the original WiFi driver for Nexus 4/the modified driver
that you're developing has support for multiple virtual WiFi interfaces [1]?

What I try to do is to create multiple WiFi virtual interfaces in the
managed mode by using the iw utility (cross-compiled for Android):
1. shell at android:# iw phy phy0 interface add vif type manage
2. shell at android:# iw phy phy0 interface add vif2 type managed
I will use each virtual interface to connect to a different AP and then let
a Layer 4 protocol (MPTCP [2) to split the traffic on each interface. It's
worth mentioning that I need to do it on an Android smartphone, because I
already did it using Linux.

Now, the problem is that I can't find an Android smartphone which supports
the creation of multi-vifs. For example, the second command above fails on
my Nexus 5 device which has a Broadcom WiFi chip, so I was wondering if a
smartphone with an Atheros card has support for multiple virtual interfaces.

I have more question, but first I want to make sure that you understood the
above problem.

[1] http://lwn.net/Articles/321690/
[2] http://multipath-tcp.org/
[3] http://nets.cs.pub.ro/~costin/files/multi-wifi.pdf

Thanks a lot,

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