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Edit File: ip.py

import dataclasses
import ipaddress
import itertools
import logging
import time
from abc import ABCMeta, abstractmethod
from typing import FrozenSet, Iterable, Iterator, List

from defence360agent.utils import log_error_and_ignore, timeit
from defence360agent.utils.common import DAY, rate_limit
from defence360agent.utils.ipecho import APIError as IPEchoAPIError
from defence360agent.utils.ipecho import IPEchoAPI
from im360.contracts.config import UnifiedAccessLogger
from im360.contracts.config import Webshield as WebshieldConfig
from im360.internals.core import rules
from im360.model.custom_lists import CustomBlacklist, CustomWhitelist
from im360.model.firewall import IgnoreList, IPList
from im360.model.firewall import IPv4 as DB_IPv4
from im360.model.firewall import IPv6 as DB_IPv6
from im360.model.firewall import RemoteProxy, RemoteProxyGroup
from im360.model.global_whitelist import (
    GlobalImunifyWhitelist,
    GlobalWhitelist,
)
from im360.subsys import webshield
from im360.subsys.webshield_mode import (
    get_module_based_ports,
    Mode as WebshieldMode,
)
from im360.utils.net import local_dns_from_resolv_conf, local_ip_addresses
from defence360agent.utils.validate import IP, IPVersion, LocalhostIP

from .. import ip_versions
from ..firewall import FirewallRules, is_nat_available
from . import (
    IP_SET_PREFIX,
    AbstractIPSet,
    IPSetCount,
    get_ipset_family,
    libipset,
)
from .base import (
    IPSetAtomicRestoreBase,
    ignore_if_ipset_not_found,
    raise_error_if_disabled,
)
from .libipset import IPSetCmdBuilder

logger = logging.getLogger(__name__)
throttled_log_error = rate_limit(period=DAY, on_drop=logger.warning)(
    logger.error
)

ADD = "add"
DEL = "del"

_LOCAL_HOST_ADDRESS = {
    IP.V4: (4, LocalhostIP[IP.V4].value),
    IP.V6: (6, LocalhostIP[IP.V6].value),
}

def _prepare_command(
    ip, ipset_name, expiration=None, action=ADD, ip_version=None
):
    if (ip_version or IP.type_of(ip)) not in ip_versions.enabled():
        return None
    timeout = 0  # permanently
    if action == ADD:
        if expiration:
            timeout = int(expiration - time.time())
            if timeout <= 0:  # expired
                return None
    return (
        " ".join(
            libipset.prepare_ipset_command(action, ipset_name, ip, timeout)
        )
        + "\n"
    )

_RULE = dict(
    table=FirewallRules.FILTER,
    chain=FirewallRules.IMUNIFY_INPUT_CHAIN,
    priority=FirewallRules.DEFAULT_PRIORITY,
)

class BaseIPSet(IPSetAtomicRestoreBase, metaclass=ABCMeta):
    _NAME = ""  #: ipset name template such as '{prefix}.{ip_version}.graylist'
    DB_NAME = ""
    MAX_ELEM = 100000
    # according to
    # http://git.netfilter.org/ipset/tree/lib/parse.c#n1396
    # http://git.netfilter.org/ipset/tree/include/libipset/linux_ip_set.h
    MAX_SET_NAME_LENGTH = 31

@log_error_and_ignore(
        exception=libipset.IgnoredIPSetKernelError, log_handler=logger.warning
    )
    @ignore_if_ipset_not_found
    @raise_error_if_disabled
    async def add(self, ip, timeout=0):
        version = IP.type_of(ip)
        if version not in ip_versions.enabled():
            logger.warning("Cannot add ip %s: %s is disabled", ip, version)
            return
        ipset_name = self.gen_ipset_name_for_ip_version(version)
        await libipset.add_item(ipset_name, ip, timeout)

async def get_db_count(self, ip_version: IPVersion):
        assert self.DB_NAME, "db name for set is not defined"
        iplist_version = (
            IPList.VERSION_IP4 if ip_version == IP.V4 else IPList.VERSION_IP6
        )
        return IPList.fetch_non_expired_query(
            self.DB_NAME, version=iplist_version
        ).count()

def _query(self, version):
        assert self.DB_NAME, "db name for set is not defined"
        return IPList.fetch_non_expired(self.DB_NAME, version=version)

async def gen_ipset_restore_ops(self, ip_version: IPVersion) -> List[str]:
        def prepare_command(_row, ipset_name):
            return _prepare_command(
                _row["ip"], ipset_name, _row.get("expiration")
            )

ipset_name = self.gen_ipset_name_for_ip_version(ip_version)
        return list(
            filter(
                None,
                (
                    prepare_command(row, ipset_name)
                    for row in self._query(
                        version=(
                            IPList.VERSION_IP4
                            if ip_version == IP.V4
                            else IPList.VERSION_IP6
                        )
                    )
                ),
            )
        )

@staticmethod
    def _make_record(ip, ipset_name, expiration=None, action=ADD) -> dict:
        return dict(
            ip=ip, ipset_name=ipset_name, expiration=expiration, action=action
        )

@abstractmethod
    def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:  # pragma: no cover
        raise NotImplementedError()

def gen_ipset_create_ops(
        self,
        ip_version: IPVersion,
        timeout: int = 0,
        datatype: str = libipset.HASH_NET,
        **options,
    ) -> List[str]:
        return [
            IPSetCmdBuilder.get_create_cmd(
                self.gen_ipset_name_for_ip_version(ip_version),
                datatype=datatype,
                family=get_ipset_family(ip_version),
                timeout=timeout,
                maxelem=self.MAX_ELEM,
            )
        ]

def gen_ipset_destroy_ops(self, ip_version: IPVersion) -> List[str]:
        ipset_name = self.gen_ipset_name_for_ip_version(ip_version)
        return [IPSetCmdBuilder.get_destroy_cmd(ipset_name)]

def gen_ipset_flush_ops(self, ip_version: IPVersion) -> List[str]:
        return [
            IPSetCmdBuilder.get_flush_cmd(
                self.gen_ipset_name_for_ip_version(ip_version)
            )
        ]

def gen_ipset_name_for_ip_version(self, ip_version: IPVersion) -> str:
        if self.custom_ipset_name:
            return self.custom_ipset_name

assert self._NAME, "set name is not defined"
        assert ip_version in (IP.V4, IP.V6), "IP {} is incorrect".format(
            ip_version
        )
        full_name = self._NAME.format(
            prefix=IP_SET_PREFIX, ip_version=ip_version
        )
        assert (
            len(full_name) <= self.MAX_SET_NAME_LENGTH
        ), "setname {} is longer than {} characters".format(
            full_name, self.MAX_SET_NAME_LENGTH
        )
        return full_name

def _ipset_name_from_ip(self, ip):
        return self.gen_ipset_name_for_ip_version(IP.type_of(ip))

def create_rules(self, ip_version: IPVersion):
        set_name = self.gen_ipset_name_for_ip_version(ip_version)
        return self.rules(set_name, ip_version=ip_version)

def _generate_for_restore(self, block_ips, unblock_ips):
        # first unblock then block
        for ip in unblock_ips:
            ipset_name = self._ipset_name_from_ip(ip)
            yield self._make_record(ip, ipset_name, action=DEL)

for ip, properties in block_ips:
            ipset_name = self._ipset_name_from_ip(ip)
            yield self._make_record(
                ip=ip,
                ipset_name=ipset_name,
                expiration=properties["expiration"],
            )

@log_error_and_ignore(
        exception=libipset.IgnoredIPSetKernelError, log_handler=logger.warning
    )
    @ignore_if_ipset_not_found
    async def restore(self, block_ips, unblock_ips):
        """Run "ipset restore" for given ips."""
        lines = list()
        records = self._generate_for_restore(block_ips, unblock_ips)
        for rec in records:
            cmd = _prepare_command(**rec)
            if cmd:
                lines.append(cmd)
        with timeit("ipset_restore [%s]" % (self.__class__.__name__,), logger):
            await libipset.restore(lines, name=self.__class__.__name__)

def _log_rule(self, set_name, ip_version: IPVersion, prefix, priority):
        yield from map(
            dataclasses.asdict,
            rules.log_rules(set_name, ip_version, prefix, priority),
        )

class WebshieldEnabledIPSet(BaseIPSet):
    def is_enabled(self, ip_version: IPVersion = None) -> bool:
        if not super().is_enabled():
            return False  # short circuit behavior

enabled = WebshieldConfig.ENABLE
        if enabled and not (
            webshield_expects_traffic := webshield.expects_traffic()
        ):
            logger.warning("Webshield enabled, but it does not expect traffic")
        return enabled and webshield_expects_traffic

class IPSetGray(WebshieldEnabledIPSet):
    _NAME = "{prefix}.{ip_version}.graylist"
    DB_NAME = IPList.GRAY
    MAX_ELEM = 2000000
    # Default block in the graylist ipset in days
    GRAYLIST_DEFAULT_TIMEOUT = libipset.IPSET_TIMEOUT_MAX

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield from map(
            dataclasses.asdict,
            rules.webshield_rules(
                set_name,
                ip_version,
                # note: make the flag is true in exactly one place
                rules.CaptchaRuleBuilder(),
            ),
        )

def gen_ipset_create_ops(
        self,
        ip_version: IPVersion,
        timeout: int = 0,
        datatype: str = libipset.HASH_NET,
        **options,
    ) -> List[str]:
        return super().gen_ipset_create_ops(
            ip_version=ip_version,
            timeout=self.GRAYLIST_DEFAULT_TIMEOUT,
        )

class IPSetGraySplashScreen(IPSetGray):
    """Inherited from Gray this list has less priority and do not block,
    only redirect to webshield webports."""

_NAME = "{prefix}.{ip_version}.graysplashlist"
    DB_NAME = IPList.GRAY_SPLASHSCREEN

def is_enabled(self, ip_version: IPVersion = None) -> bool:
        return super().is_enabled() and WebshieldConfig.SPLASH_SCREEN

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield from map(
            dataclasses.asdict,
            rules.webshield_rules(
                set_name, ip_version, rules.SplashscreenRuleBuilder()
            ),
        )

class IPSetRemoteProxy(WebshieldEnabledIPSet):
    _NAME = "{prefix}.{ip_version}.remote_proxy"
    DB_NAME = ""  # we override _query

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        current_mode = WebshieldMode.get()
        if WebshieldMode.wants_redirect(current_mode):
            redirect_map = webshield.port_redirect_map()
            dest_ports = webshield.redirected_to_webshield_ports(
                current_mode
            ) & set(redirect_map)
            yield from map(
                dataclasses.asdict,
                rules.check_access_to_webshield_ports_rules(
                    set_name, set(redirect_map[p] for p in dest_ports)
                ),
            )
        else:
            dest_ports = get_module_based_ports()
            redirect_map = {port: port for port in dest_ports}

if dest_ports:
            yield dict(
                _RULE,
                rule=FirewallRules.open_dst_ports_for_src_list(
                    set_name, set(redirect_map[p] for p in dest_ports)
                ),
                priority=FirewallRules.REMOTE_PROXY_PRIORITY,
            )

if not WebshieldMode.wants_redirect(current_mode):
            return

if is_nat_available(ip_version):
            yield from map(
                dataclasses.asdict,
                rules.redirect_port_rules(
                    set_name,
                    dest_ports,
                    redirect_map,
                    FirewallRules.NAT,
                    FirewallRules.redirect_to_captcha,
                    FirewallRules.REMOTE_PROXY_PRIORITY,
                ),
            )
        else:
            # Similar to IPSetGray
            yield from map(
                dataclasses.asdict,
                rules.redirect_port_rules(
                    set_name,
                    dest_ports,
                    redirect_map,
                    FirewallRules.MANGLE,
                    FirewallRules.redirect_to_captcha_via_tproxy,
                    FirewallRules.REMOTE_PROXY_PRIORITY,
                ),
            )

yield dict(
                _RULE,
                rule=FirewallRules.traffic_not_from_tproxy(set_name),
            )

async def get_db_count(self, ip_version: IPVersion):
        iplist_version = (
            IPList.VERSION_IP4 if ip_version == IP.V4 else IPList.VERSION_IP6
        )
        q = (
            RemoteProxy.select(RemoteProxy.network)
            .join(RemoteProxyGroup)
            .where(RemoteProxyGroup.enabled)
        )
        return sum(
            ipaddress.ip_network(item[0]).version == iplist_version
            for item in q.tuples()
        )

def _query(self, version):
        q = (
            RemoteProxy.select(RemoteProxy.network)
            .join(RemoteProxyGroup)
            .where(RemoteProxyGroup.enabled)
        )
        return [
            {"ip": item[0], "expiration": 0}
            for item in q.tuples()
            if ipaddress.ip_network(item[0]).version == version
        ]

class IPSetStaticRemoteProxy(IPSetRemoteProxy):
    _NAME = "{prefix}.{ip_version}.remote_proxy_static"

async def gen_ipset_restore_ops(self, ip_version: IPVersion) -> List[str]:
        cmd_list = []
        ipset_name = self.gen_ipset_name_for_ip_version(ip_version)
        for ip in await GlobalWhitelist.load(group="proxy"):
            if IP.type_of(ip) != ip_version:
                continue
            cmd = _prepare_command(ip, ipset_name, ip_version=ip_version)
            if cmd:
                cmd_list.append(cmd)
        return cmd_list

def is_enabled(self, ip_version: IPVersion = None) -> bool:
        return super().is_enabled() and WebshieldConfig.KNOWN_PROXIES_SUPPORT

async def get_db_count(self, ip_version: IPVersion):
        return sum(
            IP.type_of(ip) == ip_version
            for ip in await GlobalWhitelist.load(group="proxy")
        )

class IPSetWhite(BaseIPSet):
    _NAME = "{prefix}.{ip_version}.whitelist"
    DB_NAME = IPList.WHITE

if is_nat_available(ip_version):
            yield dict(
                _RULE,
                rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
                table=FirewallRules.NAT,
            )
        else:
            yield dict(
                _RULE,
                rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
                table=FirewallRules.MANGLE,
            )

async def delete(self, ip):
        await super(IPSetWhite, self).delete(ip)

# we need also delete from full access list
        await IPSetWhiteFullAccess().delete(ip)

async def get_db_count(self, ip_version: IPVersion):
        db_ip_version = DB_IPv4 if ip_version == IP.V4 else DB_IPv6
        return IPList.fetch_non_expired_query(
            IPList.WHITE, full_access=False, version=db_ip_version
        ).count()

def _query(self, version):
        return IPList.fetch_non_expired(
            IPList.WHITE, full_access=False, version=version
        )

def get_non_captcha_passed_ips(self):
        whitelisted_entries = IPList.fetch_non_expired_query(
            IPList.WHITE, full_access=False
        )
        non_captcha_passed_entries = (
            whitelisted_entries.where(~IPList.captcha_passed)
            .dicts()
            .iterator()
        )
        # FIXME: after migrating to peewee 3 switch back to this
        # return (entry["ip"] for entry in non_captcha_passed_entries)
        try:
            for entry in non_captcha_passed_entries:
                yield entry["ip"]
        except RuntimeError:
            return

class IPSetBlack(BaseIPSet):
    _NAME = "{prefix}.{ip_version}.blacklist"
    DB_NAME = IPList.BLACK

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield from map(
            dataclasses.asdict, rules.drop_rules(set_name, ip_version)
        )

class IPSetWhiteFullAccess(BaseIPSet):
    _NAME = "{prefix}.{ip_version}.whitelist.full_access"

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield from self._log_rule(
            set_name,
            ip_version,
            UnifiedAccessLogger.WHITELIST,
            FirewallRules.FULL_ACCESS_PRIORITY,
        )
        yield dict(
            _RULE,
            rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
            priority=FirewallRules.FULL_ACCESS_PRIORITY,
        )
        yield dict(
            table=FirewallRules.FILTER,
            chain=FirewallRules.IMUNIFY_OUTPUT_CHAIN,
            priority=FirewallRules.FULL_ACCESS_PRIORITY,
            # it is much better to write iptables rules explicitly, instead
            # of guessing that somewhere in the deepest stack frames it uses
            # 'src' instead of desired 'dst'
            rule=(
                "-m",
                "set",
                "--match-set",
                set_name,
                "dst",
                "-j",
                FirewallRules.RETURN,
            ),
        )
        if is_nat_available(ip_version):
            yield dict(
                _RULE,
                rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
                table=FirewallRules.NAT,
            )
        else:
            yield dict(
                _RULE,
                rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
                table=FirewallRules.MANGLE,
            )

def get_local_records(self, version=None):
        for ip_version, (_version, ip_address) in _LOCAL_HOST_ADDRESS.items():
            if not version or _version == version:
                yield self._make_record(
                    ip_address, self.gen_ipset_name_for_ip_version(ip_version)
                )

async def get_db_count(self, ip_version: IPVersion):
        db_ip_version = DB_IPv4 if ip_version == IP.V4 else DB_IPv6
        local_count = sum(
            1 for _ in self.get_local_records(version=db_ip_version)
        )
        whitelisted_db_count = IPList.fetch_non_expired_query(
            IPList.WHITE, full_access=True, version=db_ip_version
        ).count()
        return local_count + whitelisted_db_count

def _query(self, version=None):
        return itertools.chain(
            self.get_local_records(version=version),
            IPList.fetch_non_expired(
                IPList.WHITE, full_access=True, version=version
            ),
        )

def query_all(self):
        return self._query()

class IPSetStatic(BaseIPSet):
    _NAME = "{prefix}.{ip_version}.whitelist.static"
    _PRIORITY = FirewallRules.STATIC_WHITELIST_PRIORITY

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield from map(
            dataclasses.asdict,
            rules.white_rules(
                set_name,
                ip_version,
                priority=self._PRIORITY,
            ),
        )

async def gen_ipset_restore_ops(self, ip_version: IPVersion):
        cmd_list = []
        ipset_name = self.gen_ipset_name_for_ip_version(ip_version)
        for ip in await self._get_ips(ip_version):
            if IP.type_of(ip) != ip_version:
                continue
            cmd = _prepare_command(ip, ipset_name, ip_version=ip_version)
            if cmd:
                cmd_list.append(cmd)
        return cmd_list

async def _get_ips(self, ip_version: IPVersion) -> Iterable[str]:
        return await GlobalWhitelist.load()

async def get_db_count(self, ip_version: IPVersion):
        return sum(
            IP.type_of(ip) == ip_version
            for ip in await self._get_ips(ip_version)
        )

class IPSetI360Static(IPSetStatic):
    _NAME = "{prefix}.{ip_version}.i360_whitelist.static"
    _PRIORITY = FirewallRules.WHITELIST_PRIORITY

async def _get_ips(self, ip_version: IPVersion) -> Iterable[str]:
        return await GlobalImunifyWhitelist.load()

class IPSetWhitelistHostIPs(IPSetStatic):
    _NAME = "{prefix}.{ip_version}.whitelist.host_ips"
    _PRIORITY = FirewallRules.HOST_IPS_PRIORITY

async def _get_ips(self, ip_version: IPVersion) -> Iterable[str]:
        result = set(
            str(IP.ipv6_to_64network(ip)) for ip in local_ip_addresses()
        )

try:
            own_nat_ip = await IPEchoAPI.get_ip(ip_version)
            if own_nat_ip:
                result.add(str(IP.ipv6_to_64network(own_nat_ip)))
        except IPEchoAPIError:
            pass

result.update(local_dns_from_resolv_conf(ip_version))

return result

class IPSetCustomWhitelist(IPSetStatic):
    _NAME = "{prefix}.{ip_version}.whitelist.custom"
    _LIST = CustomWhitelist
    _PRIORITY = FirewallRules.WHITELIST_PRIORITY
    MAX_ELEM = 524288

async def gen_ipset_restore_ops(self, ip_version: IPVersion) -> List[str]:
        cmd_list = []
        ipset_name = self.gen_ipset_name_for_ip_version(ip_version)
        for ip in await self._LIST.load():
            if IP.type_of(ip) != ip_version:
                continue
            cmd = _prepare_command(ip, ipset_name, ip_version=ip_version)
            if cmd:
                cmd_list.append(cmd)
        return cmd_list

async def get_db_count(self, ip_version: IPVersion):
        return sum(
            IP.type_of(ip) == ip_version for ip in await self._LIST.load()
        )

class IPSetCustomBlacklist(IPSetCustomWhitelist):
    _NAME = "{prefix}.{ip_version}.blacklist.custom"
    _LIST = CustomBlacklist

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield dict(
            _RULE,
            rule=FirewallRules.ipset_rule(
                set_name, FirewallRules.LOG_BLACKLIST_CHAIN
            ),
            priority=FirewallRules.BLACKLIST_PRIORITY,
        )

class IPSetIgnore(BaseIPSet):
    _NAME = "{prefix}.{ip_version}.ignorelist"

def rules(
        self, set_name: str, ip_version: IPVersion, **kwargs
    ) -> Iterator[dict]:
        yield dict(
            _RULE,
            rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
        )
        if is_nat_available(ip_version):
            yield dict(
                _RULE,
                rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
                table=FirewallRules.NAT,
            )
        else:
            yield dict(
                _RULE,
                rule=FirewallRules.ipset_rule(set_name, FirewallRules.RETURN),
                table=FirewallRules.MANGLE,
            )

async def get_db_count(self, ip_version: IPVersion):
        db_ip_version = DB_IPv4 if ip_version == IP.V4 else DB_IPv6
        return (
            IgnoreList.select()
            .where(IgnoreList.version == db_ip_version)
            .count()
        )

def _query(self, version):
        return IgnoreList.select().where(IgnoreList.version == version).dicts()

class IPSet(AbstractIPSet):
    def __init__(self):
        super().__init__()
        self.ip_sets = [
            IPSetRemoteProxy(),
            IPSetStaticRemoteProxy(),
            IPSetWhiteFullAccess(),
            IPSetStatic(),
            IPSetI360Static(),
            IPSetWhitelistHostIPs(),
            IPSetCustomWhitelist(),
            IPSetWhite(),
            IPSetIgnore(),
            IPSetBlack(),
            IPSetCustomBlacklist(),
            IPSetGraySplashScreen(),
            IPSetGray(),
        ]

def get_all_ipsets(self, ip_version: IPVersion) -> FrozenSet[str]:
        return frozenset(
            set_.gen_ipset_name_for_ip_version(ip_version)
            for set_ in self.ip_sets
            if set_.is_enabled()
        )

def get_all_ipset_instances(
        self, ip_version: IPVersion
    ) -> List[IPSetAtomicRestoreBase]:
        return self.ip_sets

def get_ipset(self, db_listname):
        for ipset_ in self.ip_sets:
            if ipset_.DB_NAME == db_listname:
                return ipset_
        raise LookupError("Set {} not found".format(db_listname))

async def block(
        self,
        ip,
        listname=IPList.GRAY,
        timeout=0,
        full_access=False,
        *args,
        **kwargs,
    ):
        """Block the ip

:param ip: ip for blocking
        :param listname: ipset list for blocking
        :param timeout: relative timeout in seconds, if equal 0 - permanently
        :param full_access: full access for whitelist
        :return:
        """

assert IP.is_valid_ip_network(ip)

ipset_ = (
            IPSetWhiteFullAccess() if full_access else self.get_ipset(listname)
        )
        if not ipset_.is_enabled():
            raise RuntimeError(
                "Set {} is disabled".format(ipset_.__class__.__name__)
            )
        await ipset_.add(ip, timeout)

async def unblock(self, ip, listname=IPList.GRAY, *args, **kwargs):
        """Unblock the ip

:param ip: ip for blocking
        :param listname: ipset list for blocking
        :return:
        """
        assert IP.is_valid_ip_network(ip)
        set_ = self.get_ipset(listname)
        if set_.is_enabled():
            await set_.delete(ip)

def gen_ipset_create_ops(self, ip_version: IPVersion) -> List[str]:
        """
        Generate list of commands to create all ip sets

:return: list of ipset commands to use with ipset restore
        """
        ipsets = []
        for set_ in self.ip_sets:
            if set_.is_enabled():
                ipsets.extend(set_.gen_ipset_create_ops(ip_version))
        return ipsets

def get_rules(self, ip_version: IPVersion, **kwargs) -> Iterable[dict]:
        ruleset = []
        for set_ in self.ip_sets:
            if set_.is_enabled():
                ruleset.extend(set_.create_rules(ip_version))
        return ruleset

async def restore(self, ip_version: IPVersion) -> None:
        for s in self.ip_sets:
            if s.is_enabled():
                await s.restore_from_persistent(ip_version)

async def get_ipsets_count(self, ip_version: IPVersion) -> list:
        ipsets = []
        for ip_set in self.ip_sets:
            if ip_set.is_enabled():
                set_name = ip_set.gen_ipset_name_for_ip_version(ip_version)
                expected_count = await ip_set.get_db_count(ip_version)
                ipset_count = await libipset.get_ipset_count(set_name)
                ipsets.append(
                    IPSetCount(
                        name=set_name,
                        db_count=expected_count,
                        ipset_count=ipset_count,
                    )
                )
        return ipsets

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