1#!/usr/bin/python2 2# 3# Copyright 2016 The Chromium OS Authors. All rights reserved. 4# Use of this source code is governed by a BSD-style license that can be 5# found in the LICENSE file. 6 7# Collect network stats from the DUT. 8# For now just collect the byte count from the default interface. 9 10from autotest_lib.client.common_lib import utils 11 12def get_network_stats(machine): 13 try: 14 dut = hosts.create_target_machine(machine) 15 16 # The information is not critical, so ping the DUT first 17 # and if it doesn't reply quickly, give up. 18 if utils.ping(dut.hostname, tries=1, timeout=3) != 0: 19 logging.info('ping failed: not collecting network stats') 20 return 21 22 # In a single ssh call, get list of network interfaces 23 # and their byte counts. 24 result = dut.run('route; echo SEPARATOR; cat /proc/net/dev') 25 26 # Split output 27 lines = result.stdout.splitlines() 28 separator_index = lines.index('SEPARATOR') 29 route_lines = lines[:separator_index] 30 proc_lines = lines[separator_index+1:] 31 32 for line in route_lines: 33 fields = line.split() 34 # look for default network interface 35 if fields[0] == 'default': 36 iface = fields[7] 37 iface_prefix = iface + ':' 38 break 39 else: 40 logging.info('get_network_stats: no default interface') 41 return 42 43 for line in proc_lines: 44 fields = line.split() 45 # Look for the interface in /proc/net/dev. 46 if fields[0] == iface_prefix: 47 logging.info('get_network_stats: %s RXbytes %s TXbytes %s', 48 network_stats_label, fields[1], fields[9]) 49 break 50 else: 51 logging.info('get_network_stats: iface %s not in /proc/net/dev', 52 iface) 53 except Exception as e: 54 logging.info('get_network_stats: ignoring exception: %s', e) 55 56 57job.parallel_simple(get_network_stats, machines) 58