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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 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 subp
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_netbsd(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 len(toks) > 1:
if re.search(r"flags=[x\d]+<up.*>", toks[1]):
devs[curdev]['up'] = True
for i in range(len(toks)):
if toks[i] == "inet": # Create new ipv4 addr entry
network, net_bits = toks[i + 1].split('/')
devs[curdev]['ipv4'].append(
{'ip': network, 'mask': net_prefix_to_ipv4_mask(net_bits)})
elif toks[i] == "broadcast":
devs[curdev]['ipv4'][-1]['bcast'] = toks[i + 1]
elif toks[i] == "address:":
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(r'.*<(\S+)>', toks[i + 1])
if res:
devs[curdev]['ipv6'][-1]['scope6'] = res.group(1)
else:
devs[curdev]['ipv6'][-1]['scope6'] = toks[i + 1]
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(r'.*<(\S+)>', toks[i + 1])
if res:
devs[curdev]['ipv6'][-1]['scope6'] = res.group(1)
else:
devs[curdev]['ipv6'][-1]['scope6'] = toks[i + 1]
return devs
def netdev_info(empty=""):
devs = {}
if util.is_NetBSD():
(ifcfg_out, _err) = subp.subp(["ifconfig", "-a"], rcs=[0, 1])
devs = _netdev_info_ifconfig_netbsd(ifcfg_out)
elif subp.which('ip'):
# Try iproute first of all
(ipaddr_out, _err) = subp.subp(["ip", "addr", "show"])
devs = _netdev_info_iproute(ipaddr_out)
elif subp.which('ifconfig'):
# Fall back to net-tools if iproute2 is not present
(ifcfg_out, _err) = subp.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 == "":
return devs
recurse_types = (dict, tuple, list)
def fill(data, new_val="", empty_vals=("", b"")):
"""Recursively replace 'empty_vals' in data (dict, tuple, list)
with new_val"""
if isinstance(data, dict):
myiter = data.items()
elif isinstance(data, (tuple, list)):
myiter = enumerate(data)
else:
raise TypeError("Unexpected input to fill")
for key, val in myiter:
if val in empty_vals:
data[key] = new_val
elif isinstance(val, recurse_types):
fill(val, new_val)
fill(devs, new_val=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) = subp.subp(
["ip", "--oneline", "-6", "route", "list", "table", "all"],
rcs=[0, 1])
except subp.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) = subp.subp(
["netstat", "-A", "inet6", "--route", "--numeric"], rcs=[0, 1])
except subp.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 subp.which('ip'):
# Try iproute first of all
(iproute_out, _err) = subp.subp(["ip", "-o", "route", "list"])
routes = _netdev_route_info_iproute(iproute_out)
elif subp.which('netstat'):
# Fall back to net-tools if iproute2 is not present
(route_out, _err) = subp.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 netdev_pformat():
lines = []
empty = "."
try:
netdev = netdev_info(empty=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', empty), data["hwaddr"]))
for addr in data.get('ipv6'):
tbl.add_row(
(dev, data["up"], addr["ip"], empty,
addr.get("scope6", empty), data["hwaddr"]))
if len(data.get('ipv6')) + len(data.get('ipv4')) == 0:
tbl.add_row((dev, data["up"], empty, empty, empty,
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
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