/usr/lib/python2.7/dist-packages/cloudinit/netinfo.py is in cloud-init 0.7.6~bzr976-2.
This file is owned by root:root, with mode 0o644.
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#
# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import cloudinit.util as util
import re
from prettytable import PrettyTable
def netdev_info(empty=""):
fields = ("hwaddr", "addr", "bcast", "mask")
(ifcfg_out, _err) = util.subp(["ifconfig", "-a"])
devs = {}
for line in str(ifcfg_out).splitlines():
if len(line) == 0:
continue
if line[0] not in ("\t", " "):
curdev = line.split()[0]
devs[curdev] = {"up": False}
for field in fields:
devs[curdev][field] = ""
toks = line.lower().strip().split()
if toks[0] == "up":
devs[curdev]['up'] = True
# If the output of ifconfig doesn't contain the required info in the
# obvious place, use a regex filter to be sure.
elif len(toks) > 1:
if re.search(r"flags=\d+<up,", toks[1]):
devs[curdev]['up'] = True
fieldpost = ""
if toks[0] == "inet6":
fieldpost = "6"
for i in range(len(toks)):
# older net-tools (ubuntu) show 'inet addr:xx.yy',
# newer (freebsd and fedora) show 'inet xx.yy'
# just skip this 'inet' entry. (LP: #1285185)
try:
if (toks[i] in ("inet", "inet6") and
toks[i + 1].startswith("addr:")):
continue
except IndexError:
pass
# Couple the different items we're interested in with the correct
# field since FreeBSD/CentOS/Fedora differ in the output.
ifconfigfields = {
"addr:": "addr", "inet": "addr",
"bcast:": "bcast", "broadcast": "bcast",
"mask:": "mask", "netmask": "mask",
"hwaddr": "hwaddr", "ether": "hwaddr",
}
for origfield, field in ifconfigfields.items():
target = "%s%s" % (field, fieldpost)
if devs[curdev].get(target, ""):
continue
if toks[i] == "%s" % origfield:
try:
devs[curdev][target] = toks[i + 1]
except IndexError:
pass
elif toks[i].startswith("%s" % origfield):
devs[curdev][target] = toks[i][len(field) + 1:]
if empty != "":
for (_devname, dev) in devs.iteritems():
for field in dev:
if dev[field] == "":
dev[field] = empty
return devs
def route_info():
(route_out, _err) = util.subp(["netstat", "-rn"])
routes = []
entries = route_out.splitlines()[1:]
for line in entries:
if not line:
continue
toks = line.split()
# FreeBSD shows 6 items in the routing table:
# Destination Gateway Flags Refs Use Netif Expire
# default 10.65.0.1 UGS 0 34920 vtnet0
#
# Linux netstat shows 2 more:
# Destination Gateway Genmask Flags MSS Window irtt Iface
# 0.0.0.0 10.65.0.1 0.0.0.0 UG 0 0 0 eth0
if (len(toks) < 6 or toks[0] == "Kernel" or
toks[0] == "Destination" or toks[0] == "Internet" or
toks[0] == "Internet6" or toks[0] == "Routing"):
continue
if len(toks) < 8:
toks.append("-")
toks.append("-")
toks[7] = toks[5]
toks[5] = "-"
entry = {
'destination': toks[0],
'gateway': toks[1],
'genmask': toks[2],
'flags': toks[3],
'metric': toks[4],
'ref': toks[5],
'use': toks[6],
'iface': toks[7],
}
routes.append(entry)
return routes
def getgateway():
routes = []
try:
routes = route_info()
except:
pass
for r in routes:
if r['flags'].find("G") >= 0:
return "%s[%s]" % (r['gateway'], r['iface'])
return None
def netdev_pformat():
lines = []
try:
netdev = netdev_info(empty=".")
except Exception:
lines.append(util.center("Net device info failed", '!', 80))
netdev = None
if netdev is not None:
fields = ['Device', 'Up', 'Address', 'Mask', 'Hw-Address']
tbl = PrettyTable(fields)
for (dev, d) in netdev.iteritems():
tbl.add_row([dev, d["up"], d["addr"], d["mask"], d["hwaddr"]])
netdev_s = tbl.get_string()
max_len = len(max(netdev_s.splitlines(), key=len))
header = util.center("Net device info", "+", max_len)
lines.extend([header, netdev_s])
return "\n".join(lines)
def route_pformat():
lines = []
try:
routes = route_info()
except Exception:
lines.append(util.center('Route info failed', '!', 80))
routes = None
if routes is not None:
fields = ['Route', 'Destination', 'Gateway',
'Genmask', 'Interface', 'Flags']
tbl = PrettyTable(fields)
for (n, r) in enumerate(routes):
route_id = str(n)
tbl.add_row([route_id, r['destination'],
r['gateway'], r['genmask'],
r['iface'], r['flags']])
route_s = tbl.get_string()
max_len = len(max(route_s.splitlines(), key=len))
header = util.center("Route info", "+", max_len)
lines.extend([header, route_s])
return "\n".join(lines)
def debug_info(prefix='ci-info: '):
lines = []
netdev_lines = netdev_pformat().splitlines()
if prefix:
for line in netdev_lines:
lines.append("%s%s" % (prefix, line))
else:
lines.extend(netdev_lines)
route_lines = route_pformat().splitlines()
if prefix:
for line in route_lines:
lines.append("%s%s" % (prefix, line))
else:
lines.extend(route_lines)
return "\n".join(lines)
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