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# This file is part of the sos project: https://github.com/sosreport/sos
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# version 2 of the GNU General Public License.
#
# See the LICENSE file in the source distribution for further information.
from sos.plugins import Plugin, RedHatPlugin, UbuntuPlugin, DebianPlugin
import os
import re
class Networking(Plugin):
"""network and device configuration
"""
plugin_name = "networking"
profiles = ('network', 'hardware', 'system')
trace_host = "www.example.com"
option_list = [(
("traceroute", "collect a traceroute to %s" % trace_host, "slow",
False)
)]
# switch to enable netstat "wide" (non-truncated) output mode
ns_wide = "-W"
def get_eth_interfaces(self, ip_link_out):
"""Return a dictionary for which keys are ethernet interface
names taken from the output of "ip -o link".
"""
out = {}
for line in ip_link_out.splitlines():
match = re.match('.*link/ether', line)
if match:
iface = match.string.split(':')[1].lstrip()
out[iface] = True
return out
def get_ip_netns(self, ip_netns_file):
"""Returns a list for which items are namespaces in the output of
ip netns stored in the ip_netns_file.
"""
out = []
try:
ip_netns_out = open(ip_netns_file).read()
except IOError:
return out
for line in ip_netns_out.splitlines():
# If there's no namespaces, no need to continue
if line.startswith("Object \"netns\" is unknown") \
or line.isspace() \
or line[:1].isspace():
return out
out.append(line.partition(' ')[0])
return out
def get_netns_devs(self, namespace):
"""Returns a list for which items are devices that exist within
the provided namespace.
"""
ip_link_result = self.call_ext_prog("ip netns exec " + namespace +
" ip -o link")
dev_list = []
if ip_link_result['status'] == 0:
for eth in self.get_eth_interfaces(ip_link_result['output']):
dev = eth.replace('@NONE', '')
dev_list.append(dev)
return dev_list
def collect_iptable(self, tablename):
""" When running the iptables command, it unfortunately auto-loads
the modules before trying to get output. Some people explicitly
don't want this, so check if the modules are loaded before running
the command. If they aren't loaded, there can't possibly be any
relevant rules in that table """
modname = "iptable_"+tablename
if self.check_ext_prog("grep -q %s /proc/modules" % modname):
cmd = "iptables -t "+tablename+" -nvL"
self.add_cmd_output(cmd)
def collect_ip6table(self, tablename):
""" Same as function above, but for ipv6 """
modname = "ip6table_"+tablename
if self.check_ext_prog("grep -q %s /proc/modules" % modname):
cmd = "ip6tables -t "+tablename+" -nvL"
self.add_cmd_output(cmd)
def collect_nftables(self):
""" Collects nftables rulesets with 'nft' commands if the modules
are present """
if self.check_ext_prog("grep -q nf_tables /proc/modules"):
self.add_cmd_output("nft list ruleset")
def setup(self):
super(Networking, self).setup()
self.add_copy_spec([
"/proc/net/",
"/etc/nsswitch.conf",
"/etc/yp.conf",
"/etc/inetd.conf",
"/etc/xinetd.conf",
"/etc/xinetd.d",
"/etc/host*",
"/etc/resolv.conf",
"/etc/network*",
"/etc/nftables",
"/etc/sysconfig/nftables.conf",
"/etc/nftables.conf",
"/etc/dnsmasq*",
"/sys/class/net/*/flags",
"/sys/class/net/*/statistics/",
"/etc/iproute2"
])
self.add_forbidden_path([
"/proc/net/rpc/use-gss-proxy",
"/proc/net/rpc/*/channel",
"/proc/net/rpc/*/flush",
# Cisco CDP
"/proc/net/cdp",
"/sys/net/cdp",
# Dialogic Diva
"/proc/net/eicon"
])
self.add_cmd_output("ip -o addr", root_symlink="ip_addr")
self.add_cmd_output("route -n", root_symlink="route")
self.add_cmd_output("plotnetcfg")
# collect iptables -t for any existing table, if we can't read the
# tables, collect 3 default ones (nat, mangle, filter)
try:
ip_tables_names = open("/proc/net/ip_tables_names").read()
except IOError:
ip_tables_names = "nat\nmangle\nfilter\n"
for table in ip_tables_names.splitlines():
self.collect_iptable(table)
# collect the same for ip6tables
try:
ip_tables_names = open("/proc/net/ip6_tables_names").read()
except IOError:
ip_tables_names = "nat\nmangle\nfilter\n"
for table in ip_tables_names.splitlines():
self.collect_ip6table(table)
self.collect_nftables()
self.add_cmd_output("netstat %s -neopa" % self.ns_wide,
root_symlink="netstat")
self.add_cmd_output([
"netstat -s",
"netstat %s -agn" % self.ns_wide,
"ss -peaonmi",
"ip route show table all",
"ip -6 route show table all",
"ip -4 rule",
"ip -6 rule",
"ip -s -d link",
"ip -d address",
"ifenslave -a",
"ip mroute show",
"ip maddr show",
"ip -s -s neigh show",
"ip neigh show nud noarp",
"biosdevname -d",
"tc -s qdisc show",
"ip -s macsec show",
])
# When iptables is called it will load the modules
# iptables and iptables_filter if they are not loaded.
# The same goes for ipv6.
if self.check_ext_prog("grep -q iptable_filter /proc/modules"):
self.add_cmd_output("iptables -vnxL")
if self.check_ext_prog("grep -q ip6table_filter /proc/modules"):
self.add_cmd_output("ip6tables -vnxL")
# Get ethtool output for every device that does not exist in a
# namespace.
ip_link_result = self.call_ext_prog("ip -o link")
if ip_link_result['status'] == 0:
for dev in self.get_eth_interfaces(ip_link_result['output']):
eth = dev.replace('@NONE', '')
self.add_cmd_output([
"ethtool "+eth,
"ethtool -d "+eth,
"ethtool -i "+eth,
"ethtool -k "+eth,
"ethtool -S "+eth,
"ethtool -T "+eth,
"ethtool -a "+eth,
"ethtool -c "+eth,
"ethtool -g "+eth
])
# Collect information about bridges (some data already collected via
# "ip .." commands)
self.add_cmd_output([
"bridge -s -s -d link show",
"bridge -s -s -d -t fdb show",
"bridge -s -s -d -t mdb show",
"bridge -d vlan show"
])
if self.get_option("traceroute"):
self.add_cmd_output("/bin/traceroute -n %s" % self.trace_host)
# Capture additional data from namespaces; each command is run
# per-namespace.
ip_netns_file = self.get_cmd_output_now("ip netns")
cmd_prefix = "ip netns exec "
if ip_netns_file:
for namespace in self.get_ip_netns(ip_netns_file):
ns_cmd_prefix = cmd_prefix + namespace + " "
self.add_cmd_output([
ns_cmd_prefix + "ip address show",
ns_cmd_prefix + "ip route show table all",
ns_cmd_prefix + "iptables-save",
ns_cmd_prefix + "ss -peaonmi",
ns_cmd_prefix + "netstat %s -neopa" % self.ns_wide,
ns_cmd_prefix + "netstat -s",
ns_cmd_prefix + "netstat %s -agn" % self.ns_wide
])
# Devices that exist in a namespace use less ethtool
# parameters. Run this per namespace.
for namespace in self.get_ip_netns(ip_netns_file):
for eth in self.get_netns_devs(namespace):
ns_cmd_prefix = cmd_prefix + namespace + " "
self.add_cmd_output([
ns_cmd_prefix + "ethtool " + eth,
ns_cmd_prefix + "ethtool -i " + eth,
ns_cmd_prefix + "ethtool -k " + eth,
ns_cmd_prefix + "ethtool -S " + eth
])
return
class RedHatNetworking(Networking, RedHatPlugin):
trace_host = "rhn.redhat.com"
def setup(self):
# Handle change from -T to -W in Red Hat netstat 2.0 and greater.
try:
netstat_pkg = self.policy.package_manager.all_pkgs()['net-tools']
# major version
if int(netstat_pkg['version'][0]) < 2:
self.ns_wide = "-T"
except Exception:
# default to upstream option
pass
super(RedHatNetworking, self).setup()
class UbuntuNetworking(Networking, UbuntuPlugin, DebianPlugin):
trace_host = "archive.ubuntu.com"
def setup(self):
super(UbuntuNetworking, self).setup()
self.add_copy_spec([
"/etc/resolvconf",
"/etc/network/interfaces",
"/etc/network/interfaces.d",
"/etc/ufw",
"/var/log/ufw.Log",
"/etc/resolv.conf",
"/run/netplan/*.yaml",
"/etc/netplan/*.yaml",
"/lib/netplan/*.yaml",
"/run/systemd/network"
])
self.add_cmd_output([
"/usr/sbin/ufw status",
"/usr/sbin/ufw app list"
])
if self.get_option("traceroute"):
self.add_cmd_output("/usr/sbin/traceroute -n %s" % self.trace_host)
# vim: set et ts=4 sw=4 :
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