# 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.report.plugins import (Plugin, RedHatPlugin, UbuntuPlugin,
                                DebianPlugin, SoSPredicate, PluginOpt)


class Networking(Plugin):

    short_desc = 'Network and networking devices configuration'

    plugin_name = "networking"
    profiles = ('network', 'hardware', 'system')
    trace_host = "www.example.com"

    option_list = [
        PluginOpt("traceroute", default=False,
                  desc=f"collect a traceroute to {trace_host}"),
        PluginOpt("namespace-pattern", default="", val_type=str,
                  desc=("Specific namespace names or patterns to collect, "
                        "whitespace delimited.")),
        PluginOpt("namespaces", default=None, val_type=int,
                  desc="Number of namespaces to collect, 0 for unlimited"),
        PluginOpt("ethtool-namespaces", default=True,
                  desc=("Toggle if ethtool commands should be run for each "
                        "namespace")),
        PluginOpt("eepromdump", default=False,
                  desc="Toggle collection of 'ethtool -e' for NICs")
    ]

    # switch to enable netstat "wide" (non-truncated) output mode
    ns_wide = "-W"

    # list of kernel modules needed by ss_cmd, this may vary by distro version
    ss_kmods = ['tcp_diag', 'udp_diag', 'inet_diag', 'unix_diag',
                'netlink_diag', 'af_packet_diag', 'xsk_diag']

    # list of ethtool short options, used in add_copy_spec and add_cmd_tags
    # do NOT add there "e" (see eepromdump plugopt)
    ethtool_shortopts = "acdgiklmPST"

    def setup(self):
        super().setup()

        self.add_file_tags({
            '/proc/net/bonding/bond.*': 'bond',
            '/etc/hosts': 'hosts'
        })

        self.add_copy_spec([
            "/etc/dnsmasq*",
            "/etc/host*",
            "/etc/inetd.conf",
            "/etc/iproute2",
            "/etc/network*",
            "/etc/nsswitch.conf",
            "/etc/resolv.conf",
            "/etc/xinetd.conf",
            "/etc/xinetd.d",
            "/etc/yp.conf",
            "/proc/net/",
            "/sys/class/net/*/device/numa_node",
            "/sys/class/net/*/flags",
            "/sys/class/net/*/statistics/",
        ])

        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",
                            tags='ip_addr')
        self.add_cmd_output("ip route show table all", root_symlink="ip_route",
                            tags=['ip_route', 'iproute_show_table_all'])
        self.add_cmd_output("plotnetcfg")

        self.add_cmd_output(f"netstat {self.ns_wide} -neopa",
                            root_symlink="netstat")

        self.add_cmd_output([
            "nstat -zas",
            "netstat -s",
            f"netstat {self.ns_wide} -agn",
            "networkctl status -a",
            "ip -6 route show table all",
            "ip -d route show cache",
            "ip -d -6 route show cache",
            "ip -4 rule list",
            "ip -6 rule list",
            "ip vrf show",
            "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",
        ])

        if self.path_isdir('/sys/class/devlink'):
            self.add_cmd_output([
                "devlink dev param show",
                "devlink dev info",
                "devlink port show",
            ])

            devlinks = self.collect_cmd_output("devlink dev")
            if devlinks['status'] == 0:
                devlinks_list = devlinks['output'].splitlines()
                for devlink in devlinks_list:
                    self.add_cmd_output(f"devlink dev eswitch show {devlink}")

        # below commands require some kernel module(s) to be loaded
        # run them only if the modules are loaded, or if explicitly requested
        # via --allow-system-changes option
        ip_macsec_show_cmd = "ip -s macsec show"
        macsec_pred = SoSPredicate(self, kmods=['macsec'])
        self.add_cmd_output(ip_macsec_show_cmd, pred=macsec_pred, changes=True)

        self.collect_ss_ip_ethtool_info()
        self.collect_bridge_info()

    def add_command_tags(self):
        """ Command tags for ip/ethtool/netstat """
        for opt in self.ethtool_shortopts:
            self.add_cmd_tags({
                f'ethtool -{opt} .*': f'ethool_{opt}'
            })

        self.add_cmd_tags({
            "ethtool [^-].*": "ethtool",
            "ip -d address": "ip_addr",
            "ip -s -s neigh show": "ip_neigh_show",
            "ip -s -d link": "ip_s_link",
            "netstat.*-neopa": "netstat",
            "netstat.*-agn": "netstat_agn",
            "netstat -s": "netstat_s"
        })

    def collect_bridge_info(self):
        """ 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"
        ])

    def collect_ss_ip_ethtool_info(self):
        """ Collect ss, ip and ethtool cmd outputs """
        ss_cmd = "ss -peaonmi"
        ss_pred = SoSPredicate(self, kmods=self.ss_kmods,
                               required={'kmods': 'all'})
        self.add_cmd_output(ss_cmd, pred=ss_pred, changes=True)

        # Get ethtool output for every device that does not exist in a
        # namespace.
        _ecmds = [f"ethtool -{opt}" for opt in self.ethtool_shortopts]
        self.add_device_cmd([
            _cmd + " %(dev)s" for _cmd in _ecmds
        ], devices='ethernet')

        self.add_device_cmd([
            "ethtool %(dev)s",
            "ethtool --phy-statistics %(dev)s",
            "ethtool --show-priv-flags %(dev)s",
            "ethtool --show-eee %(dev)s",
            "tc -s filter show dev %(dev)s",
            "tc -s filter show dev %(dev)s ingress",
        ], devices="ethernet")

        # skip EEPROM collection by default, as it might hang or
        # negatively impact the system on some device types
        if self.get_option("eepromdump"):
            cmd = "ethtool -e %(dev)s"
            self._log_warn("WARNING: collecting an eeprom dump is known to "
                           "cause certain NIC drivers (e.g. bnx2x/tg3) to "
                           "interrupt device operation")
            self.add_device_cmd(cmd, devices="ethernet")

        if self.get_option("traceroute"):
            self.add_cmd_output(f"/bin/traceroute -n {self.trace_host}",
                                priority=100)

        # Capture additional data from namespaces; each command is run
        # per-namespace.
        self.add_cmd_output("ip netns")
        cmd_prefix = "ip netns exec "
        namespaces = self.get_network_namespaces(
                self.get_option("namespace-pattern"),
                self.get_option("namespaces"))
        if namespaces:
            # 'ip netns exec <foo> iptables-save' must be guarded by nf_tables
            # kmod, if 'iptables -V' output contains 'nf_tables'
            # analogously for ip6tables
            cout = {'cmd': 'iptables -V', 'output': 'nf_tables'}
            co6 = {'cmd': 'ip6tables -V', 'output': 'nf_tables'}
            iptables_with_nft = (SoSPredicate(self, kmods=['nf_tables'])
                                 if self.test_predicate(self,
                                 pred=SoSPredicate(self, cmd_outputs=cout))
                                 else None)
            ip6tables_with_nft = (SoSPredicate(self, kmods=['nf_tables'])
                                  if self.test_predicate(self,
                                  pred=SoSPredicate(self, cmd_outputs=co6))
                                  else None)

            for namespace in namespaces:
                _devs = self.devices['namespaced_network'][namespace]
                _subdir = f"namespaces/{namespace}"
                ns_cmd_prefix = cmd_prefix + namespace + " "
                self.add_cmd_output([
                    ns_cmd_prefix + "ip -d address show",
                    ns_cmd_prefix + "ip route show table all",
                    ns_cmd_prefix + "ip -s -s neigh show",
                    ns_cmd_prefix + "ip -4 rule list",
                    ns_cmd_prefix + "ip -6 rule list",
                    ns_cmd_prefix + "ip vrf show",
                    ns_cmd_prefix + "sysctl -a",
                    ns_cmd_prefix + f"netstat {self.ns_wide} -neopa",
                    ns_cmd_prefix + "netstat -s",
                    ns_cmd_prefix + f"netstat {self.ns_wide} -agn",
                    ns_cmd_prefix + "nstat -zas",
                ], priority=50, subdir=_subdir)
                self.add_cmd_output([ns_cmd_prefix + "iptables-save"],
                                    pred=iptables_with_nft,
                                    subdir=_subdir,
                                    priority=50)
                self.add_cmd_output([ns_cmd_prefix + "ip6tables-save"],
                                    pred=ip6tables_with_nft,
                                    subdir=_subdir,
                                    priority=50)

                ss_cmd = ns_cmd_prefix + "ss -peaonmi"
                # --allow-system-changes is handled directly in predicate
                # evaluation, so plugin code does not need to separately
                # check for it
                self.add_cmd_output(ss_cmd, pred=ss_pred, subdir=_subdir)

                # Collect ethtool commands only when ethtool_namespaces
                # is set to true.
                if self.get_option("ethtool-namespaces"):
                    # Devices that exist in a namespace use less ethtool
                    # parameters. Run this per namespace.
                    self.add_device_cmd([
                        ns_cmd_prefix + "ethtool %(dev)s",
                        ns_cmd_prefix + "ethtool -i %(dev)s",
                        ns_cmd_prefix + "ethtool -k %(dev)s",
                        ns_cmd_prefix + "ethtool -S %(dev)s"
                    ], devices=_devs['ethernet'], priority=50, subdir=_subdir)

        self.add_command_tags()


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.pkg_by_name('net-tools')
            # major version
            if int(netstat_pkg['version'][0]) < 2:
                self.ns_wide = "-T"
        except Exception:  # pylint: disable=broad-except
            # default to upstream option
            pass

        super().setup()


class UbuntuNetworking(Networking, UbuntuPlugin, DebianPlugin):
    trace_host = "archive.ubuntu.com"

    def setup(self):

        ubuntu_jammy_and_after_ss_kmods = ['tcp_diag', 'udp_diag',
                                           'inet_diag', 'unix_diag',
                                           'netlink_diag', 'af_packet_diag',
                                           'xsk_diag', 'mptcp_diag',
                                           'raw_diag']

        if self.policy.dist_version() >= 22.04:
            self.ss_kmods = ubuntu_jammy_and_after_ss_kmods

        super().setup()

        self.add_copy_spec([
            "/etc/netplan/*.yaml",
            "/etc/network/interfaces",
            "/etc/network/interfaces.d",
            "/etc/resolv.conf",
            "/etc/resolvconf",
            "/lib/netplan/*.yaml",
            "/run/netplan/*.yaml",
            "/run/systemd/network"
        ])

    def postproc(self):

        self.do_path_regex_sub(
            "/etc/netplan",
            r"(\s+password:).*",
            r"\1 ******"
        )


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