tree 32c42d06f152b18e55018c7553e1a2ff399d7a16
parent 14998bce604ceffe4c603d6465290bd86585bc14
author Jared Pauletti <pauletti@google.com> 1571880814 -0700
committer Commit Bot <commit-bot@chromium.org> 1576040067 +0000

autotest: packet_capturer: Adding VHT support

The autotest start_capture method currently only supports configuration
options for channels up to 40 MHz wide. VHT80 and VHT160 options are
necessary to properly capture traffic on 80 MHz and 160 MHz bands from
within autotest.

BUG=chromium:1017533
TEST=Add packet_capture to network_WiFi_Perf (like in
chromium:1959712). Start network_WiFi_Perf.vht80 with a DUT (caroline
in my case), router, and pcap and then cancel it with Ctrl+C after
iperf runs for a cycle or two. Find the output directory in the first
few logging lines, then navigate to it. Find the pcap file in that
directory (FILE=`find . -name "*.pcap"`), open it with wireshark, and
filter based on `wlan.fc.type_subtype==0x28`. Export a new pcap with
only these frames, and then parse it using tshark: `tshark -r ${FILE}
-T fields -e radiotap.vht.bw | sort | uniq -c`. Verify that the
majority is the value 4 (the value of this field corresponding to 80
MHz).

Change-Id: I8dd0f5ddca427812909d434374d97be98a4e0940
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1877829
Tested-by: Jared Pauletti <pauletti@google.com>
Commit-Queue: Jared Pauletti <pauletti@google.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>