62 lines
2.2 KiB
Python
62 lines
2.2 KiB
Python
# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import re, socket, subprocess
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from autotest_lib.client.common_lib import error
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class HostRoute(object):
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"""
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Host Route: A utility for retrieving information about our route to a host
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"""
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def __init__(self, host):
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self.host = host # Remote host
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self.calculate()
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def calculate(self):
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output = self.run_command(["ip", "route", "get", self.host])
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# This converts "172.22.18.53 via 10.0.0.1 dev eth0 src 10.0.0.200 \n.."
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# into ("via", "10.0.0.1", "dev", "eth0", "src", "10.0.0.200")
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route_info = re.split("\s*", output.split("\n")[0].rstrip(' '))[1:]
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# Further, convert the list into a dict {"via": "10.0.0.1", ...}
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self.route_info = dict(tuple(route_info[i:i+2])
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for i in range(0, len(route_info), 2))
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if 'src' not in self.route_info:
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raise error.TestFail('Cannot find route to host %s' % self.host)
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class LocalHostRoute(HostRoute):
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"""
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Self Host Route: Retrieve host route for the test-host machine
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"""
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def __init__(self, host):
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# TODO(pstew): If we could depend on the host having the "ip" command
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# we would just be able to do this:
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#
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# HostRoute.__init__(self, host)
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#
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# but alas, we can't depend on this, so we fake it by creating a
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# socket and figuring out what local address we bound to if we
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# connected to the client
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.connect((host, 22)) # NB: Port doesn't matter
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self.route_info = { 'src': sock.getsockname()[0] }
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def run_command(self, args):
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return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
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class RemoteHostRoute(HostRoute):
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"""
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Remote Host Route: Retrieve host route for a remote (DUT, server) machine
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"""
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def __init__(self, remote, host):
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self.remote = remote
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HostRoute.__init__(self, host)
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def run_command(self, args):
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return self.remote.run(' '.join(args)).stdout
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