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https://github.com/systemd/systemd.git
synced 2026-08-04 15:10:33 +00:00
networkd: Add support for ipv6 privacy extension
This patch add support for ipv6 privacy extensions. The variable /proc/sys/net/ipv6/conf/<if>/use_tempaddr can be changed via the boolean IPv6PrivacyExtensions=[yes/no/prefer-temporary] When true enables privacy extensions, but prefer public addresses over temporary addresses. prefer-temporary prefers temporary adresses over public addresses. Defaults to false. [Match] Name=enp0s25 [Network] IPv6PrivacyExtensions=prefer-temporary
This commit is contained in:
Susant Sahani
@@ -116,6 +116,19 @@ static bool link_ipv6_forward_enabled(Link *link) {
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return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
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}
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static bool link_ipv6_privacy_extensions_enabled(Link *link) {
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if (link->flags & IFF_LOOPBACK)
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return false;
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if (!link->network)
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return false;
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if (link->network->ipv6_privacy_extensions == _IPV6_PRIVACY_EXTENSIONS_INVALID)
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return false;
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return link->network->ipv6_privacy_extensions;
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}
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#define FLAG_STRING(string, flag, old, new) \
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(((old ^ new) & flag) \
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? ((old & flag) ? (" -" string) : (" +" string)) \
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@@ -1506,6 +1519,28 @@ static int link_set_ipv6_forward(Link *link) {
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return 0;
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}
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static int link_set_ipv6_privacy_extensions(Link *link) {
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char buf[2 * DECIMAL_STR_MAX(unsigned) + 1];
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const char *p = NULL;
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int r;
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/* Make this a NOP if IPv6 is not available */
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if (!socket_ipv6_is_supported())
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return 0;
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if (!link_ipv6_privacy_extensions_enabled(link))
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return 0;
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p = strjoina("/proc/sys/net/ipv6/conf/", link->ifname, "/use_tempaddr");
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xsprintf(buf, "%u", link->network->ipv6_privacy_extensions);
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r = write_string_file_no_create(p, buf);
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if (r < 0)
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log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
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return 0;
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}
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static int link_configure(Link *link) {
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int r;
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@@ -1525,6 +1560,10 @@ static int link_configure(Link *link) {
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if (r < 0)
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return r;
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r = link_set_ipv6_privacy_extensions(link);
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if (r < 0)
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return r;
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if (link_ipv4ll_enabled(link)) {
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r = ipv4ll_configure(link);
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if (r < 0)
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@@ -15,69 +15,70 @@ struct ConfigPerfItem;
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%struct-type
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%includes
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%%
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Match.MACAddress, config_parse_hwaddr, 0, offsetof(Network, match_mac)
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Match.Path, config_parse_strv, 0, offsetof(Network, match_path)
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Match.Driver, config_parse_strv, 0, offsetof(Network, match_driver)
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Match.Type, config_parse_strv, 0, offsetof(Network, match_type)
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Match.Name, config_parse_ifnames, 0, offsetof(Network, match_name)
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Match.Host, config_parse_net_condition, CONDITION_HOST, offsetof(Network, match_host)
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Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(Network, match_virt)
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Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(Network, match_kernel)
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Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(Network, match_arch)
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Link.MACAddress, config_parse_hwaddr, 0, offsetof(Network, mac)
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Link.MTUBytes, config_parse_iec_size, 0, offsetof(Network, mtu)
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Network.Description, config_parse_string, 0, offsetof(Network, description)
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Network.Bridge, config_parse_netdev, 0, offsetof(Network, bridge)
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Network.Bond, config_parse_netdev, 0, offsetof(Network, bond)
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Network.VLAN, config_parse_netdev, 0, 0
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Network.MACVLAN, config_parse_netdev, 0, 0
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Network.IPVLAN, config_parse_netdev, 0, 0
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Network.VXLAN, config_parse_netdev, 0, 0
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Network.Tunnel, config_parse_tunnel, 0, 0
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Network.DHCP, config_parse_dhcp, 0, offsetof(Network, dhcp)
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Network.DHCPServer, config_parse_bool, 0, offsetof(Network, dhcp_server)
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Network.LinkLocalAddressing, config_parse_address_family_boolean, 0, offsetof(Network, link_local)
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Network.IPv4LLRoute, config_parse_bool, 0, offsetof(Network, ipv4ll_route)
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Network.IPv6Token, config_parse_ipv6token, 0, offsetof(Network, ipv6_token)
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Network.LLDP, config_parse_bool, 0, offsetof(Network, lldp)
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Network.Address, config_parse_address, 0, 0
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Network.Gateway, config_parse_gateway, 0, 0
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Network.Domains, config_parse_domains, 0, offsetof(Network, domains)
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Network.DNS, config_parse_strv, 0, offsetof(Network, dns)
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Network.LLMNR, config_parse_llmnr, 0, offsetof(Network, llmnr)
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Network.NTP, config_parse_strv, 0, offsetof(Network, ntp)
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Network.IPForward, config_parse_address_family_boolean_with_kernel,0, offsetof(Network, ip_forward)
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Network.IPMasquerade, config_parse_bool, 0, offsetof(Network, ip_masquerade)
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Network.BindCarrier, config_parse_strv, 0, offsetof(Network, bind_carrier)
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Address.Address, config_parse_address, 0, 0
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Address.Peer, config_parse_address, 0, 0
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Address.Broadcast, config_parse_broadcast, 0, 0
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Address.Label, config_parse_label, 0, 0
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Route.Gateway, config_parse_gateway, 0, 0
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Route.Destination, config_parse_destination, 0, 0
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Route.Source, config_parse_destination, 0, 0
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Route.Metric, config_parse_route_priority, 0, 0
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Route.Scope, config_parse_route_scope, 0, 0
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DHCP.ClientIdentifier, config_parse_dhcp_client_identifier, 0, offsetof(Network, dhcp_client_identifier)
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DHCP.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp_dns)
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DHCP.UseNTP, config_parse_bool, 0, offsetof(Network, dhcp_ntp)
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DHCP.UseMTU, config_parse_bool, 0, offsetof(Network, dhcp_mtu)
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DHCP.UseHostname, config_parse_bool, 0, offsetof(Network, dhcp_hostname)
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DHCP.UseDomains, config_parse_bool, 0, offsetof(Network, dhcp_domains)
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DHCP.UseRoutes, config_parse_bool, 0, offsetof(Network, dhcp_routes)
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DHCP.SendHostname, config_parse_bool, 0, offsetof(Network, dhcp_sendhost)
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DHCP.RequestBroadcast, config_parse_bool, 0, offsetof(Network, dhcp_broadcast)
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DHCP.CriticalConnection, config_parse_bool, 0, offsetof(Network, dhcp_critical)
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DHCP.VendorClassIdentifier, config_parse_string, 0, offsetof(Network, dhcp_vendor_class_identifier)
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DHCP.RouteMetric, config_parse_unsigned, 0, offsetof(Network, dhcp_route_metric)
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Bridge.Cost, config_parse_unsigned, 0, offsetof(Network, cost)
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BridgeFDB.MACAddress, config_parse_fdb_hwaddr, 0, 0
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BridgeFDB.VLANId, config_parse_fdb_vlan_id, 0, 0
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Match.MACAddress, config_parse_hwaddr, 0, offsetof(Network, match_mac)
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Match.Path, config_parse_strv, 0, offsetof(Network, match_path)
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Match.Driver, config_parse_strv, 0, offsetof(Network, match_driver)
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Match.Type, config_parse_strv, 0, offsetof(Network, match_type)
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Match.Name, config_parse_ifnames, 0, offsetof(Network, match_name)
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Match.Host, config_parse_net_condition, CONDITION_HOST, offsetof(Network, match_host)
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Match.Virtualization, config_parse_net_condition, CONDITION_VIRTUALIZATION, offsetof(Network, match_virt)
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Match.KernelCommandLine, config_parse_net_condition, CONDITION_KERNEL_COMMAND_LINE, offsetof(Network, match_kernel)
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Match.Architecture, config_parse_net_condition, CONDITION_ARCHITECTURE, offsetof(Network, match_arch)
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Link.MACAddress, config_parse_hwaddr, 0, offsetof(Network, mac)
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Link.MTUBytes, config_parse_iec_size, 0, offsetof(Network, mtu)
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Network.Description, config_parse_string, 0, offsetof(Network, description)
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Network.Bridge, config_parse_netdev, 0, offsetof(Network, bridge)
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Network.Bond, config_parse_netdev, 0, offsetof(Network, bond)
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Network.VLAN, config_parse_netdev, 0, 0
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Network.MACVLAN, config_parse_netdev, 0, 0
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Network.IPVLAN, config_parse_netdev, 0, 0
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Network.VXLAN, config_parse_netdev, 0, 0
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Network.Tunnel, config_parse_tunnel, 0, 0
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Network.DHCP, config_parse_dhcp, 0, offsetof(Network, dhcp)
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Network.DHCPServer, config_parse_bool, 0, offsetof(Network, dhcp_server)
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Network.LinkLocalAddressing, config_parse_address_family_boolean, 0, offsetof(Network, link_local)
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Network.IPv4LLRoute, config_parse_bool, 0, offsetof(Network, ipv4ll_route)
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Network.IPv6Token, config_parse_ipv6token, 0, offsetof(Network, ipv6_token)
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Network.LLDP, config_parse_bool, 0, offsetof(Network, lldp)
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Network.Address, config_parse_address, 0, 0
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Network.Gateway, config_parse_gateway, 0, 0
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Network.Domains, config_parse_domains, 0, offsetof(Network, domains)
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Network.DNS, config_parse_strv, 0, offsetof(Network, dns)
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Network.LLMNR, config_parse_llmnr, 0, offsetof(Network, llmnr)
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Network.NTP, config_parse_strv, 0, offsetof(Network, ntp)
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Network.IPForward, config_parse_address_family_boolean_with_kernel,0, offsetof(Network, ip_forward)
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Network.IPMasquerade, config_parse_bool, 0, offsetof(Network, ip_masquerade)
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Network.IPv6PrivacyExtensions, config_parse_ipv6_privacy_extensions, 0, offsetof(Network, ipv6_privacy_extensions)
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Network.BindCarrier, config_parse_strv, 0, offsetof(Network, bind_carrier)
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Address.Address, config_parse_address, 0, 0
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Address.Peer, config_parse_address, 0, 0
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Address.Broadcast, config_parse_broadcast, 0, 0
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Address.Label, config_parse_label, 0, 0
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Route.Gateway, config_parse_gateway, 0, 0
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Route.Destination, config_parse_destination, 0, 0
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Route.Source, config_parse_destination, 0, 0
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Route.Metric, config_parse_route_priority, 0, 0
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Route.Scope, config_parse_route_scope, 0, 0
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DHCP.ClientIdentifier, config_parse_dhcp_client_identifier, 0, offsetof(Network, dhcp_client_identifier)
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DHCP.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp_dns)
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DHCP.UseNTP, config_parse_bool, 0, offsetof(Network, dhcp_ntp)
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DHCP.UseMTU, config_parse_bool, 0, offsetof(Network, dhcp_mtu)
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DHCP.UseHostname, config_parse_bool, 0, offsetof(Network, dhcp_hostname)
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DHCP.UseDomains, config_parse_bool, 0, offsetof(Network, dhcp_domains)
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DHCP.UseRoutes, config_parse_bool, 0, offsetof(Network, dhcp_routes)
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DHCP.SendHostname, config_parse_bool, 0, offsetof(Network, dhcp_sendhost)
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DHCP.RequestBroadcast, config_parse_bool, 0, offsetof(Network, dhcp_broadcast)
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DHCP.CriticalConnection, config_parse_bool, 0, offsetof(Network, dhcp_critical)
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DHCP.VendorClassIdentifier, config_parse_string, 0, offsetof(Network, dhcp_vendor_class_identifier)
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DHCP.RouteMetric, config_parse_unsigned, 0, offsetof(Network, dhcp_route_metric)
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Bridge.Cost, config_parse_unsigned, 0, offsetof(Network, cost)
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BridgeFDB.MACAddress, config_parse_fdb_hwaddr, 0, 0
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BridgeFDB.VLANId, config_parse_fdb_vlan_id, 0, 0
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/* backwards compatibility: do not add new entries to this section */
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Network.IPv4LL, config_parse_ipv4ll, 0, offsetof(Network, link_local)
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DHCPv4.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp_dns)
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DHCPv4.UseMTU, config_parse_bool, 0, offsetof(Network, dhcp_mtu)
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DHCPv4.UseHostname, config_parse_bool, 0, offsetof(Network, dhcp_hostname)
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DHCP.UseDomainName, config_parse_bool, 0, offsetof(Network, dhcp_domains)
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DHCPv4.UseDomainName, config_parse_bool, 0, offsetof(Network, dhcp_domains)
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DHCPv4.CriticalConnection, config_parse_bool, 0, offsetof(Network, dhcp_critical)
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Network.IPv4LL, config_parse_ipv4ll, 0, offsetof(Network, link_local)
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DHCPv4.UseDNS, config_parse_bool, 0, offsetof(Network, dhcp_dns)
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DHCPv4.UseMTU, config_parse_bool, 0, offsetof(Network, dhcp_mtu)
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DHCPv4.UseHostname, config_parse_bool, 0, offsetof(Network, dhcp_hostname)
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DHCP.UseDomainName, config_parse_bool, 0, offsetof(Network, dhcp_domains)
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DHCPv4.UseDomainName, config_parse_bool, 0, offsetof(Network, dhcp_domains)
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DHCPv4.CriticalConnection, config_parse_bool, 0, offsetof(Network, dhcp_critical)
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@@ -111,6 +111,8 @@ static int network_load_one(Manager *manager, const char *filename) {
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network->link_local = ADDRESS_FAMILY_IPV6;
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network->ipv6_privacy_extensions = _IPV6_PRIVACY_EXTENSIONS_INVALID;
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r = config_parse(NULL, filename, file,
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"Match\0"
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"Link\0"
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@@ -751,3 +753,54 @@ int config_parse_address_family_boolean_with_kernel(
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return 0;
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}
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static const char* const ipv6_privacy_extensions_table[_IPV6_PRIVACY_EXTENSIONS_MAX] = {
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[IPV6_PRIVACY_EXTENSIONS_DISABLE] = "no",
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[IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC] = "yes",
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[IPV6_PRIVACY_EXTENSIONS_PREFER_TEMPORARY] = "prefer-temporary",
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};
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DEFINE_STRING_TABLE_LOOKUP(ipv6_privacy_extensions, IPv6PrivacyExtensions);
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int config_parse_ipv6_privacy_extensions(
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const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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IPv6PrivacyExtensions *ipv6_privacy_extensions = data;
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int k;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(ipv6_privacy_extensions);
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/* Our enum shall be a superset of booleans, hence first try
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* to parse as boolean, and then as enum */
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k = parse_boolean(rvalue);
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if (k > 0)
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*ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC;
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else if (k == 0)
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*ipv6_privacy_extensions = IPV6_PRIVACY_EXTENSIONS_DISABLE;
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else {
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IPv6PrivacyExtensions s;
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s = ipv6_privacy_extensions_from_string(rvalue);
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if (s < 0){
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log_syntax(unit, LOG_ERR, filename, line, -s, "Failed to parse IPv6 privacy extensions option, ignoring: %s", rvalue);
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return 0;
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}
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*ipv6_privacy_extensions = s;
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}
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return 0;
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}
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@@ -90,6 +90,14 @@ typedef enum DCHPClientIdentifier {
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_DHCP_CLIENT_ID_INVALID = -1,
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} DCHPClientIdentifier;
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typedef enum IPv6PrivacyExtensions {
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IPV6_PRIVACY_EXTENSIONS_DISABLE,
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IPV6_PRIVACY_EXTENSIONS_PREFER_PUBLIC,
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IPV6_PRIVACY_EXTENSIONS_PREFER_TEMPORARY,
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_IPV6_PRIVACY_EXTENSIONS_MAX,
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_IPV6_PRIVACY_EXTENSIONS_INVALID = -1,
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} IPv6PrivacyExtensions;
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struct FdbEntry {
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Network *network;
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unsigned section;
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@@ -145,6 +153,8 @@ struct Network {
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AddressFamilyBoolean ip_forward;
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bool ip_masquerade;
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IPv6PrivacyExtensions ipv6_privacy_extensions;
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struct ether_addr *mac;
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unsigned mtu;
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@@ -455,3 +465,10 @@ int config_parse_address_family_boolean_with_kernel(const char *unit, const char
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const char* link_operstate_to_string(LinkOperationalState s) _const_;
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LinkOperationalState link_operstate_from_string(const char *s) _pure_;
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/* Ipv6 privacy extensions support */
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const char* ipv6_privacy_extensions_to_string(IPv6PrivacyExtensions i) _const_;
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IPv6PrivacyExtensions ipv6_privacy_extensions_from_string(const char *s) _pure_;
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int config_parse_ipv6_privacy_extensions(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
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