networkd: add support for prefix allow-list and route allow-list
This commit is contained in:
Susant Sahani
Yu Watanabe
parent
3f0af4a5f9
commit
de6b6ff84c
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@ -2100,6 +2100,15 @@ IPv6Token=prefixstable:2002:da8:1::</programlisting></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>PrefixAllowList=</varname></term>
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<listitem>
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<para>A whitespace-separated list of IPv6 prefixes. IPv6 prefixes supplied via router
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advertisements in the list are allowed. Note that if <varname>PrefixAllowList=</varname> is
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configured then <varname>PrefixDenyList=</varname> is ignored.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RouteDenyList=</varname></term>
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<listitem>
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@ -2108,6 +2117,15 @@ IPv6Token=prefixstable:2002:da8:1::</programlisting></para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RouteAllowList=</varname></term>
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<listitem>
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<para>A whitespace-separated list of IPv6 route prefixes. IPv6 route prefixes supplied via
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router advertisements in the list are allowed. Note that if <varname>RouteAllowList=</varname> is
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configured then <varname>RouteDenyList=</varname> is ignored.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>DHCPv6Client=</varname></term>
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<listitem>
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@ -69,6 +69,12 @@ void network_adjust_ipv6_accept_ra(Network *network) {
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if (network->ipv6_accept_ra < 0)
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/* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
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network->ipv6_accept_ra = !FLAGS_SET(network->ip_forward, ADDRESS_FAMILY_IPV6);
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/* When PrefixAllowList= or RouteAllowList= are specified, then PrefixDenyList= or RouteDenyList= are ignored. */
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if (!set_isempty(network->ndisc_allow_listed_prefix))
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network->ndisc_deny_listed_prefix = set_free_free(network->ndisc_deny_listed_prefix);
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if (!set_isempty(network->ndisc_allow_listed_route_prefix))
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network->ndisc_deny_listed_route_prefix = set_free_free(network->ndisc_deny_listed_route_prefix);
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}
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static int ndisc_remove_old_one(Link *link, const struct in6_addr *router, bool force);
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@ -839,12 +845,17 @@ static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get route address: %m");
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if (set_contains(link->network->ndisc_deny_listed_route_prefix, &dst.in6)) {
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if ((!set_isempty(link->network->ndisc_allow_listed_route_prefix) &&
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!set_contains(link->network->ndisc_allow_listed_route_prefix, &dst.in6)) ||
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set_contains(link->network->ndisc_deny_listed_route_prefix, &dst.in6)) {
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *buf = NULL;
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(void) in_addr_to_string(AF_INET6, &dst, &buf);
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log_link_debug(link, "Route Prefix '%s' is deny-listed, ignoring", strnull(buf));
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if (!set_isempty(link->network->ndisc_allow_listed_route_prefix))
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log_link_debug(link, "Route prefix '%s' is not in allow list, ignoring", strnull(buf));
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else
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log_link_debug(link, "Route prefix '%s' is in deny list, ignoring", strnull(buf));
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}
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return 0;
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}
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@ -1096,12 +1107,17 @@ static int ndisc_router_process_options(Link *link, sd_ndisc_router *rt) {
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if (r < 0)
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return log_link_error_errno(link, r, "Failed to get prefix address: %m");
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if (set_contains(link->network->ndisc_deny_listed_prefix, &a.in6)) {
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if ((!set_isempty(link->network->ndisc_allow_listed_prefix) &&
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!set_contains(link->network->ndisc_allow_listed_prefix, &a.in6)) ||
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set_contains(link->network->ndisc_deny_listed_prefix, &a.in6)) {
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *b = NULL;
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(void) in_addr_to_string(AF_INET6, &a, &b);
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log_link_debug(link, "Prefix '%s' is deny-listed, ignoring", strna(b));
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if (!set_isempty(link->network->ndisc_allow_listed_prefix))
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log_link_debug(link, "Prefix '%s' is not in allow list, ignoring", strna(b));
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else
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log_link_debug(link, "Prefix '%s' is in deny list, ignoring", strna(b));
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}
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break;
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}
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@ -1377,7 +1393,7 @@ DEFINE_HASH_OPS_WITH_KEY_DESTRUCTOR(
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ipv6_token_compare_func,
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free);
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int config_parse_ndisc_deny_listed_prefix(
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int config_parse_ndisc_address_filter(
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const char *unit,
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const char *filename,
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unsigned line,
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@ -1390,7 +1406,6 @@ int config_parse_ndisc_deny_listed_prefix(
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void *userdata) {
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Set **list = data;
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bool is_route;
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int r;
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assert(filename);
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@ -1403,8 +1418,6 @@ int config_parse_ndisc_deny_listed_prefix(
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return 0;
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}
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is_route = streq_ptr(lvalue, "RouteDenyList");
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for (const char *p = rvalue;;) {
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_cleanup_free_ char *n = NULL;
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_cleanup_free_ struct in6_addr *a = NULL;
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@ -1415,8 +1428,8 @@ int config_parse_ndisc_deny_listed_prefix(
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"Failed to parse NDisc deny-listed %sprefix, ignoring assignment: %s",
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is_route ? "route " : "", rvalue);
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"Failed to parse NDisc %s=, ignoring assignment: %s",
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lvalue, rvalue);
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return 0;
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}
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if (r == 0)
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@ -1425,8 +1438,8 @@ int config_parse_ndisc_deny_listed_prefix(
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r = in_addr_from_string(AF_INET6, n, &ip);
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if (r < 0) {
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log_syntax(unit, LOG_WARNING, filename, line, r,
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"NDisc deny-listed %sprefix is invalid, ignoring assignment: %s",
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is_route ? "route " : "", n);
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"NDisc %s= entry is invalid, ignoring assignment: %s",
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lvalue, n);
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continue;
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}
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@ -1439,8 +1452,8 @@ int config_parse_ndisc_deny_listed_prefix(
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return log_oom();
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if (r == 0)
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log_syntax(unit, LOG_WARNING, filename, line, 0,
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"NDisc deny-listed %sprefix entry %s is duplicated, ignoring assignment.",
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is_route ? "route " : "", n);
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"NDisc %s= entry is duplicated, ignoring assignment: %s",
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lvalue, n);
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}
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}
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@ -77,7 +77,7 @@ int ndisc_configure(Link *link);
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void ndisc_vacuum(Link *link);
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void ndisc_flush(Link *link);
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CONFIG_PARSER_PROTOTYPE(config_parse_ndisc_deny_listed_prefix);
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CONFIG_PARSER_PROTOTYPE(config_parse_ndisc_address_filter);
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CONFIG_PARSER_PROTOTYPE(config_parse_address_generation_type);
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CONFIG_PARSER_PROTOTYPE(config_parse_ipv6_accept_ra_start_dhcp6_client);
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@ -237,8 +237,10 @@ IPv6AcceptRA.UseDNS, config_parse_bool,
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IPv6AcceptRA.UseDomains, config_parse_dhcp_use_domains, 0, offsetof(Network, ipv6_accept_ra_use_domains)
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IPv6AcceptRA.DHCPv6Client, config_parse_ipv6_accept_ra_start_dhcp6_client, 0, offsetof(Network, ipv6_accept_ra_start_dhcp6_client)
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IPv6AcceptRA.RouteTable, config_parse_section_route_table, 0, 0
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IPv6AcceptRA.PrefixDenyList, config_parse_ndisc_deny_listed_prefix, 0, offsetof(Network, ndisc_deny_listed_prefix)
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IPv6AcceptRA.RouteDenyList, config_parse_ndisc_deny_listed_prefix, 0, offsetof(Network, ndisc_deny_listed_route_prefix)
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IPv6AcceptRA.PrefixAllowList, config_parse_ndisc_address_filter, 0, offsetof(Network, ndisc_allow_listed_prefix)
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IPv6AcceptRA.PrefixDenyList, config_parse_ndisc_address_filter, 0, offsetof(Network, ndisc_deny_listed_prefix)
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IPv6AcceptRA.RouteAllowList, config_parse_ndisc_address_filter, 0, offsetof(Network, ndisc_allow_listed_route_prefix)
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IPv6AcceptRA.RouteDenyList, config_parse_ndisc_address_filter, 0, offsetof(Network, ndisc_deny_listed_route_prefix)
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DHCPServer.MaxLeaseTimeSec, config_parse_sec, 0, offsetof(Network, dhcp_server_max_lease_time_usec)
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DHCPServer.DefaultLeaseTimeSec, config_parse_sec, 0, offsetof(Network, dhcp_server_default_lease_time_usec)
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DHCPServer.EmitDNS, config_parse_bool, 0, offsetof(Network, dhcp_server_emit[SD_DHCP_LEASE_DNS].emit)
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@ -470,8 +472,8 @@ DHCP.RapidCommit, config_parse_bool,
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DHCP.ForceDHCPv6PDOtherInformation, config_parse_bool, 0, offsetof(Network, dhcp6_force_pd_other_information)
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DHCPv4.UseDomainName, config_parse_dhcp_use_domains, 0, offsetof(Network, dhcp_use_domains)
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DHCPv4.CriticalConnection, config_parse_tristate, 0, offsetof(Network, dhcp_critical)
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IPv6AcceptRA.DenyList, config_parse_ndisc_deny_listed_prefix, 0, offsetof(Network, ndisc_deny_listed_prefix)
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IPv6AcceptRA.BlackList, config_parse_ndisc_deny_listed_prefix, 0, offsetof(Network, ndisc_deny_listed_prefix)
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IPv6AcceptRA.DenyList, config_parse_ndisc_address_filter, 0, offsetof(Network, ndisc_deny_listed_prefix)
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IPv6AcceptRA.BlackList, config_parse_ndisc_address_filter, 0, offsetof(Network, ndisc_deny_listed_prefix)
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TrafficControlQueueingDiscipline.Parent, config_parse_qdisc_parent, _QDISC_KIND_INVALID, 0
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TrafficControlQueueingDiscipline.NetworkEmulatorDelaySec, config_parse_network_emulator_delay, 0, 0
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TrafficControlQueueingDiscipline.NetworkEmulatorDelayJitterSec, config_parse_network_emulator_delay, 0, 0
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@ -607,7 +607,9 @@ static Network *network_free(Network *network) {
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ordered_set_free(network->router_search_domains);
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free(network->router_dns);
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set_free_free(network->ndisc_deny_listed_prefix);
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set_free_free(network->ndisc_allow_listed_prefix);
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set_free_free(network->ndisc_deny_listed_route_prefix);
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set_free_free(network->ndisc_allow_listed_route_prefix);
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free(network->bridge_name);
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free(network->bond_name);
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@ -257,7 +257,9 @@ struct Network {
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IPv6AcceptRAStartDHCP6Client ipv6_accept_ra_start_dhcp6_client;
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uint32_t ipv6_accept_ra_route_table;
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Set *ndisc_deny_listed_prefix;
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Set *ndisc_allow_listed_prefix;
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Set *ndisc_deny_listed_route_prefix;
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Set *ndisc_allow_listed_route_prefix;
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OrderedSet *ipv6_tokens;
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/* LLDP support */
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@ -310,7 +310,9 @@ UseDNS=
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DHCPv6Client=
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UseAutonomousPrefix=
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UseOnLinkPrefix=
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PrefixAllowList=
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PrefixDenyList=
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RouteAllowList=
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RouteDenyList=
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DenyList=
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BlackList=
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