This file is indexed.

/usr/lib/python3/dist-packages/cloudinit/netinfo.py is in cloud-init 18.2-14-g6d48d265-0ubuntu1.

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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
# 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.

from copy import copy, deepcopy
import re

from cloudinit import log as logging
from cloudinit.net.network_state import net_prefix_to_ipv4_mask
from cloudinit import util

from cloudinit.simpletable import SimpleTable

LOG = logging.getLogger()


DEFAULT_NETDEV_INFO = {
    "ipv4": [],
    "ipv6": [],
    "hwaddr": "",
    "up": False
}


def _netdev_info_iproute(ipaddr_out):
    """
    Get network device dicts from ip route and ip link info.

    @param ipaddr_out: Output string from 'ip addr show' command.

    @returns: A dict of device info keyed by network device name containing
              device configuration values.
    @raise: TypeError if ipaddr_out isn't a string.
    """
    devs = {}
    dev_name = None
    for num, line in enumerate(ipaddr_out.splitlines()):
        m = re.match(r'^\d+:\s(?P<dev>[^:]+):\s+<(?P<flags>\S+)>\s+.*', line)
        if m:
            dev_name = m.group('dev').lower().split('@')[0]
            flags = m.group('flags').split(',')
            devs[dev_name] = {
                'ipv4': [], 'ipv6': [], 'hwaddr': '',
                'up': bool('UP' in flags and 'LOWER_UP' in flags),
            }
        elif 'inet6' in line:
            m = re.match(
                r'\s+inet6\s(?P<ip>\S+)\sscope\s(?P<scope6>\S+).*', line)
            if not m:
                LOG.warning(
                    'Could not parse ip addr show: (line:%d) %s', num, line)
                continue
            devs[dev_name]['ipv6'].append(m.groupdict())
        elif 'inet' in line:
            m = re.match(
                r'\s+inet\s(?P<cidr4>\S+)(\sbrd\s(?P<bcast>\S+))?\sscope\s'
                r'(?P<scope>\S+).*', line)
            if not m:
                LOG.warning(
                    'Could not parse ip addr show: (line:%d) %s', num, line)
                continue
            match = m.groupdict()
            cidr4 = match.pop('cidr4')
            addr, _, prefix = cidr4.partition('/')
            if not prefix:
                prefix = '32'
            devs[dev_name]['ipv4'].append({
                'ip': addr,
                'bcast': match['bcast'] if match['bcast'] else '',
                'mask': net_prefix_to_ipv4_mask(prefix),
                'scope': match['scope']})
        elif 'link' in line:
            m = re.match(
                r'\s+link/(?P<link_type>\S+)\s(?P<hwaddr>\S+).*', line)
            if not m:
                LOG.warning(
                    'Could not parse ip addr show: (line:%d) %s', num, line)
                continue
            if m.group('link_type') == 'ether':
                devs[dev_name]['hwaddr'] = m.group('hwaddr')
            else:
                devs[dev_name]['hwaddr'] = ''
        else:
            continue
    return devs


def _netdev_info_ifconfig(ifconfig_data):
    # fields that need to be returned in devs for each dev
    devs = {}
    for line in ifconfig_data.splitlines():
        if len(line) == 0:
            continue
        if line[0] not in ("\t", " "):
            curdev = line.split()[0]
            # current ifconfig pops a ':' on the end of the device
            if curdev.endswith(':'):
                curdev = curdev[:-1]
            if curdev not in devs:
                devs[curdev] = deepcopy(DEFAULT_NETDEV_INFO)
        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

        for i in range(len(toks)):
            if toks[i] == "inet":  # Create new ipv4 addr entry
                devs[curdev]['ipv4'].append(
                    {'ip': toks[i + 1].lstrip("addr:")})
            elif toks[i].startswith("bcast:"):
                devs[curdev]['ipv4'][-1]['bcast'] = toks[i].lstrip("bcast:")
            elif toks[i] == "broadcast":
                devs[curdev]['ipv4'][-1]['bcast'] = toks[i + 1]
            elif toks[i].startswith("mask:"):
                devs[curdev]['ipv4'][-1]['mask'] = toks[i].lstrip("mask:")
            elif toks[i] == "netmask":
                devs[curdev]['ipv4'][-1]['mask'] = toks[i + 1]
            elif toks[i] == "hwaddr" or toks[i] == "ether":
                devs[curdev]['hwaddr'] = toks[i + 1]
            elif toks[i] == "inet6":
                if toks[i + 1] == "addr:":
                    devs[curdev]['ipv6'].append({'ip': toks[i + 2]})
                else:
                    devs[curdev]['ipv6'].append({'ip': toks[i + 1]})
            elif toks[i] == "prefixlen":  # Add prefix to current ipv6 value
                addr6 = devs[curdev]['ipv6'][-1]['ip'] + "/" + toks[i + 1]
                devs[curdev]['ipv6'][-1]['ip'] = addr6
            elif toks[i].startswith("scope:"):
                devs[curdev]['ipv6'][-1]['scope6'] = toks[i].lstrip("scope:")
            elif toks[i] == "scopeid":
                res = re.match(".*<(\S+)>", toks[i + 1])
                if res:
                    devs[curdev]['ipv6'][-1]['scope6'] = res.group(1)
    return devs


def netdev_info(empty=""):
    devs = {}
    if util.which('ip'):
        # Try iproute first of all
        (ipaddr_out, _err) = util.subp(["ip", "addr", "show"])
        devs = _netdev_info_iproute(ipaddr_out)
    elif util.which('ifconfig'):
        # Fall back to net-tools if iproute2 is not present
        (ifcfg_out, _err) = util.subp(["ifconfig", "-a"], rcs=[0, 1])
        devs = _netdev_info_ifconfig(ifcfg_out)
    else:
        LOG.warning(
            "Could not print networks: missing 'ip' and 'ifconfig' commands")

    if empty != "":
        for (_devname, dev) in devs.items():
            for field in dev:
                if dev[field] == "":
                    dev[field] = empty

    return devs


def _netdev_route_info_iproute(iproute_data):
    """
    Get network route dicts from ip route info.

    @param iproute_data: Output string from ip route command.

    @returns: A dict containing ipv4 and ipv6 route entries as lists. Each
              item in the list is a route dictionary representing destination,
              gateway, flags, genmask and interface information.
    """

    routes = {}
    routes['ipv4'] = []
    routes['ipv6'] = []
    entries = iproute_data.splitlines()
    default_route_entry = {
        'destination': '', 'flags': '', 'gateway': '', 'genmask': '',
        'iface': '', 'metric': ''}
    for line in entries:
        entry = copy(default_route_entry)
        if not line:
            continue
        toks = line.split()
        flags = ['U']
        if toks[0] == "default":
            entry['destination'] = "0.0.0.0"
            entry['genmask'] = "0.0.0.0"
        else:
            if '/' in toks[0]:
                (addr, cidr) = toks[0].split("/")
            else:
                addr = toks[0]
                cidr = '32'
                flags.append("H")
                entry['genmask'] = net_prefix_to_ipv4_mask(cidr)
            entry['destination'] = addr
            entry['genmask'] = net_prefix_to_ipv4_mask(cidr)
            entry['gateway'] = "0.0.0.0"
        for i in range(len(toks)):
            if toks[i] == "via":
                entry['gateway'] = toks[i + 1]
                flags.insert(1, "G")
            if toks[i] == "dev":
                entry["iface"] = toks[i + 1]
            if toks[i] == "metric":
                entry['metric'] = toks[i + 1]
        entry['flags'] = ''.join(flags)
        routes['ipv4'].append(entry)
    try:
        (iproute_data6, _err6) = util.subp(
            ["ip", "--oneline", "-6", "route", "list", "table", "all"],
            rcs=[0, 1])
    except util.ProcessExecutionError:
        pass
    else:
        entries6 = iproute_data6.splitlines()
        for line in entries6:
            entry = {}
            if not line:
                continue
            toks = line.split()
            if toks[0] == "default":
                entry['destination'] = "::/0"
                entry['flags'] = "UG"
            else:
                entry['destination'] = toks[0]
                entry['gateway'] = "::"
                entry['flags'] = "U"
            for i in range(len(toks)):
                if toks[i] == "via":
                    entry['gateway'] = toks[i + 1]
                    entry['flags'] = "UG"
                if toks[i] == "dev":
                    entry["iface"] = toks[i + 1]
                if toks[i] == "metric":
                    entry['metric'] = toks[i + 1]
                if toks[i] == "expires":
                    entry['flags'] = entry['flags'] + 'e'
            routes['ipv6'].append(entry)
    return routes


def _netdev_route_info_netstat(route_data):
    routes = {}
    routes['ipv4'] = []
    routes['ipv6'] = []

    entries = route_data.splitlines()
    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 Metric Ref    Use 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_data6, _err6) = util.subp(
            ["netstat", "-A", "inet6", "--route", "--numeric"], rcs=[0, 1])
    except util.ProcessExecutionError:
        pass
    else:
        entries6 = route_data6.splitlines()
        for line in entries6:
            if not line:
                continue
            toks = line.split()
            if (len(toks) < 7 or toks[0] == "Kernel" or
                    toks[0] == "Destination" or toks[0] == "Internet" or
                    toks[0] == "Proto" or toks[0] == "Active"):
                continue
            entry = {
                'destination': toks[0],
                'gateway': toks[1],
                'flags': toks[2],
                'metric': toks[3],
                'ref': toks[4],
                'use': toks[5],
                'iface': toks[6],
            }
            # skip lo interface on ipv6
            if entry['iface'] == "lo":
                continue
            # strip /128 from address if it's included
            if entry['destination'].endswith('/128'):
                entry['destination'] = re.sub(
                    r'\/128$', '', entry['destination'])
            routes['ipv6'].append(entry)
    return routes


def route_info():
    routes = {}
    if util.which('ip'):
        # Try iproute first of all
        (iproute_out, _err) = util.subp(["ip", "-o", "route", "list"])
        routes = _netdev_route_info_iproute(iproute_out)
    elif util.which('netstat'):
        # Fall back to net-tools if iproute2 is not present
        (route_out, _err) = util.subp(
            ["netstat", "--route", "--numeric", "--extend"], rcs=[0, 1])
        routes = _netdev_route_info_netstat(route_out)
    else:
        LOG.warning(
            "Could not print routes: missing 'ip' and 'netstat' commands")
    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 as e:
        lines.append(
            util.center(
                "Net device info failed ({error})".format(error=str(e)),
                '!', 80))
    else:
        if not netdev:
            return '\n'
        fields = ['Device', 'Up', 'Address', 'Mask', 'Scope', 'Hw-Address']
        tbl = SimpleTable(fields)
        for (dev, data) in sorted(netdev.items()):
            for addr in data.get('ipv4'):
                tbl.add_row(
                    [dev, data["up"], addr["ip"], addr["mask"],
                     addr.get('scope', '.'), data["hwaddr"]])
            for addr in data.get('ipv6'):
                tbl.add_row(
                    [dev, data["up"], addr["ip"], ".", addr["scope6"],
                     data["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) + "\n"


def route_pformat():
    lines = []
    try:
        routes = route_info()
    except Exception as e:
        lines.append(
            util.center(
                'Route info failed ({error})'.format(error=str(e)),
                '!', 80))
        util.logexc(LOG, "Route info failed: %s" % e)
    else:
        if routes.get('ipv4'):
            fields_v4 = ['Route', 'Destination', 'Gateway',
                         'Genmask', 'Interface', 'Flags']
            tbl_v4 = SimpleTable(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', 'Destination', 'Gateway', 'Interface',
                         'Flags']
            tbl_v6 = SimpleTable(fields_v6)
            for (n, r) in enumerate(routes.get('ipv6')):
                route_id = str(n)
                if r['iface'] == 'lo':
                    continue
                tbl_v6.add_row([route_id, r['destination'],
                                r['gateway'], r['iface'], r['flags']])
            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) + "\n"


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