systemd-networkd.service(8) is a system service that manages and configures network interfaces. This page describes the D-Bus interface.

The service exposes the following interfaces on the Manager object on the bus:

.RS 4

node /org/freedesktop/network1 {
  interface org.freedesktop.network1.Manager {
    methods:
      ListLinks(out a(iso) links);
      GetLinkByName(in  s name,
                    out i ifindex,
                    out o path);
      GetLinkByIndex(in  i ifindex,
                     out s name,
                     out o path);
      SetLinkNTP(in  i ifindex,
                 in  as servers);
      SetLinkDNS(in  i ifindex,
                 in  a(iay) addresses);
      SetLinkDNSEx(in  i ifindex,
                   in  a(iayqs) addresses);
      SetLinkDomains(in  i ifindex,
                     in  a(sb) domains);
      SetLinkDefaultRoute(in  i ifindex,
                          in  b enable);
      SetLinkLLMNR(in  i ifindex,
                   in  s mode);
      SetLinkMulticastDNS(in  i ifindex,
                          in  s mode);
      SetLinkDNSOverTLS(in  i ifindex,
                        in  s mode);
      SetLinkDNSSEC(in  i ifindex,
                    in  s mode);
      SetLinkDNSSECNegativeTrustAnchors(in  i ifindex,
                                        in  as names);
      RevertLinkNTP(in  i ifindex);
      RevertLinkDNS(in  i ifindex);
      RenewLink(in  i ifindex);
      ForceRenewLink(in  i ifindex);
      ReconfigureLink(in  i ifindex);
      Reload();
      DescribeLink(in  i ifindex,
                   out s json);
      Describe(out s json);
    properties:
      readonly s OperationalState = ...;
      readonly s CarrierState = ...;
      readonly s AddressState = ...;
      readonly s IPv4AddressState = ...;
      readonly s IPv6AddressState = ...;
      readonly s OnlineState = ...;
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly t NamespaceId = ...;
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
};
    

.RE

Provides information about the manager.

.RS 4

node /org/freedesktop/network1/link/_1 {
  interface org.freedesktop.network1.Link {
    methods:
      SetNTP(in  as servers);
      SetDNS(in  a(iay) addresses);
      SetDNSEx(in  a(iayqs) addresses);
      SetDomains(in  a(sb) domains);
      SetDefaultRoute(in  b enable);
      SetLLMNR(in  s mode);
      SetMulticastDNS(in  s mode);
      SetDNSOverTLS(in  s mode);
      SetDNSSEC(in  s mode);
      SetDNSSECNegativeTrustAnchors(in  as names);
      RevertNTP();
      RevertDNS();
      Renew();
      ForceRenew();
      Reconfigure();
      Describe(out s json);
    properties:
      readonly s OperationalState = ...;
      readonly s CarrierState = ...;
      readonly s AddressState = ...;
      readonly s IPv4AddressState = ...;
      readonly s IPv6AddressState = ...;
      readonly s OnlineState = ...;
      readonly s AdministrativeState = ...;
      @org.freedesktop.DBus.Property.EmitsChangedSignal("false")
      readonly (tt) BitRates = ...;
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
};
    

.RE

Provides information about interfaces.

.RS 4

node /org/freedesktop/network1/network/_1 {
  interface org.freedesktop.network1.Network {
    properties:
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly s Description = ...;
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly s SourcePath = ...;
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly as MatchMAC = [..., ...];
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly as MatchPath = [..., ...];
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly as MatchDriver = [..., ...];
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly as MatchType = [..., ...];
      @org.freedesktop.DBus.Property.EmitsChangedSignal("const")
      readonly as MatchName = [..., ...];
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
};
    

.RE

Provides information about .network files.

.RS 4

node /org/freedesktop/network1/link/_1 {
  interface org.freedesktop.network1.DHCPServer {
    properties:
      readonly a(uayayayayt) Leases = [...];
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
  interface org.freedesktop.network1.Link { ... };
};
    

.RE

Provides information about leases.

.RS 4

node /org/freedesktop/network1/link/_1 {
  interface org.freedesktop.network1.DHCPv4Client {
    properties:
      readonly s State = ...;
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
  interface org.freedesktop.network1.Link { ... };
};
    

.RE

Provides information about DHCPv4 client status.

.RS 4

node /org/freedesktop/network1/link/_1 {
  interface org.freedesktop.network1.DHCPv6Client {
    properties:
      readonly s State = ...;
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
  interface org.freedesktop.network1.Link { ... };
};
    

.RE

Provides information about DHCPv6 client status.

These D-Bus interfaces follow the usual interface versioning guidelines[1].

DHCPv4 Client Object

State was added in version 255.

DHCPv6 Client Object

State was added in version 255.

1.

the usual interface versioning guidelines

https://0pointer.de/blog/projects/versioning-dbus.html