/usr/lib/python3/dist-packages/cloudinit/netinfo.py is in cloud-init 0.7.9-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 | # 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 file is part of cloud-init. See LICENSE file for license information.
import re
from cloudinit import log as logging
from cloudinit import util
from prettytable import PrettyTable
LOG = logging.getLogger()
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",
"scope": "scope",
}
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.items():
for field in dev:
if dev[field] == "":
dev[field] = empty
return devs
def route_info():
(route_out, _err) = util.subp(["netstat", "-rn"])
routes = {}
routes['ipv4'] = []
routes['ipv6'] = []
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['ipv4'].append(entry)
try:
(route_out6, _err6) = util.subp(["netstat", "-A", "inet6", "-n"])
except util.ProcessExecutionError:
pass
else:
entries6 = route_out6.splitlines()[1:]
for line in entries6:
if not line:
continue
toks = line.split()
if (len(toks) < 6 or toks[0] == "Kernel" or
toks[0] == "Proto" or toks[0] == "Active"):
continue
entry = {
'proto': toks[0],
'recv-q': toks[1],
'send-q': toks[2],
'local address': toks[3],
'foreign address': toks[4],
'state': toks[5],
}
routes['ipv6'].append(entry)
return routes
def getgateway():
try:
routes = route_info()
except Exception:
pass
else:
for r in routes.get('ipv4', []):
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))
else:
fields = ['Device', 'Up', 'Address', 'Mask', 'Scope', 'Hw-Address']
tbl = PrettyTable(fields)
for (dev, d) in netdev.items():
tbl.add_row([dev, d["up"], d["addr"], d["mask"], ".", d["hwaddr"]])
if d.get('addr6'):
tbl.add_row([dev, d["up"],
d["addr6"], ".", d.get("scope6"), 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 as e:
lines.append(util.center('Route info failed', '!', 80))
util.logexc(LOG, "Route info failed: %s" % e)
else:
if routes.get('ipv4'):
fields_v4 = ['Route', 'Destination', 'Gateway',
'Genmask', 'Interface', 'Flags']
tbl_v4 = PrettyTable(fields_v4)
for (n, r) in enumerate(routes.get('ipv4')):
route_id = str(n)
tbl_v4.add_row([route_id, r['destination'],
r['gateway'], r['genmask'],
r['iface'], r['flags']])
route_s = tbl_v4.get_string()
max_len = len(max(route_s.splitlines(), key=len))
header = util.center("Route IPv4 info", "+", max_len)
lines.extend([header, route_s])
if routes.get('ipv6'):
fields_v6 = ['Route', 'Proto', 'Recv-Q', 'Send-Q',
'Local Address', 'Foreign Address', 'State']
tbl_v6 = PrettyTable(fields_v6)
for (n, r) in enumerate(routes.get('ipv6')):
route_id = str(n)
tbl_v6.add_row([route_id, r['proto'],
r['recv-q'], r['send-q'],
r['local address'], r['foreign address'],
r['state']])
route_s = tbl_v6.get_string()
max_len = len(max(route_s.splitlines(), key=len))
header = util.center("Route IPv6 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)
# vi: ts=4 expandtab
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