tailcfg

package
v0.100.0 Latest Latest
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 Go to latest Published: Jul 3, 2020 License: BSD-3-Clause Imports: 13 Imported by: 276

Documentation

Index

Constants

View Source 
const (
	CapRead  = CapType("read")
	CapWrite = CapType("write")
)
View Source 
const (
	MachineUnknown      = MachineStatus(iota)
	MachineUnauthorized // server has yet to approve
	MachineAuthorized   // server has approved
	MachineInvalid      // server has explicitly rejected this machine key
)
View Source 
const (
	TCP = ServiceProto("tcp")
	UDP = ServiceProto("udp")
)

Variables

View Source 
var FilterAllowAll = []FilterRule{
	FilterRule{
		SrcIPs:  []string{"*"},
		SrcBits: nil,
		DstPorts: []NetPortRange{NetPortRange{
			IP:    "*",
			Bits:  nil,
			Ports: PortRange{0, 65535},
		}},
	},
}
View Source 
var PortRangeAny = PortRange{0, 65535}

Functions

func CheckTag added in v0.98.1 

func CheckTag(tag string) error

CheckTag valids whether a given string can be used as an ACL tag. For now we allow only ascii alphanumeric tags, and they need to start with a letter. No unicode shenanigans allowed, and we reserve punctuation marks other than '-' for a possible future URI scheme.

Because we're ignoring unicode entirely, we can treat utf-8 as a series of bytes. Anything >= 128 is disqualified anyway.

We might relax these rules later.

Types

type CapType 

type CapType string

type Capability 

type Capability struct {
	ID   CapabilityID
	Type CapType
	Val  ID
}

type CapabilityID 

type CapabilityID ID

func (CapabilityID) String 

func (id CapabilityID) String() string

type DERPMap added in v0.98.1 

type DERPMap struct {
	// Regions is the set of geographic regions running DERP node(s).
	//
	// It's keyed by the DERPRegion.RegionID.
	//
	// The numbers are not necessarily contiguous.
	Regions map[int]*DERPRegion
}

DERPMap describes the set of DERP packet relay servers that are available.

func (*DERPMap) RegionIDs added in v0.98.1 

func (m *DERPMap) RegionIDs() []int

/ RegionIDs returns the sorted region IDs.

type DERPNode added in v0.98.1 

type DERPNode struct {
	// Name is a unique node name (across all regions).
	// It is not a host name.
	// It's typically of the form "1b", "2a", "3b", etc. (region
	// ID + suffix within that region)
	Name string

	// RegionID is the RegionID of the DERPRegion that this node
	// is running in.
	RegionID int

	// HostName is the DERP node's hostname.
	//
	// It is required but need not be unique; multiple nodes may
	// have the same HostName but vary in configuration otherwise.
	HostName string

	// CertName optionally specifies the expected TLS cert common
	// name. If empty, HostName is used. If CertName is non-empty,
	// HostName is only used for the TCP dial (if IPv4/IPv6 are
	// not present) + TLS ClientHello.
	CertName string `json:",omitempty"`

	// IPv4 optionally forces an IPv4 address to use, instead of using DNS.
	// If empty, A record(s) from DNS lookups of HostName are used.
	// If the string is not an IPv4 address, IPv4 is not used; the
	// conventional string to disable IPv4 (and not use DNS) is
	// "none".
	IPv4 string `json:",omitempty"`

	// IPv6 optionally forces an IPv6 address to use, instead of using DNS.
	// If empty, AAAA record(s) from DNS lookups of HostName are used.
	// If the string is not an IPv6 address, IPv6 is not used; the
	// conventional string to disable IPv6 (and not use DNS) is
	// "none".
	IPv6 string `json:",omitempty"`

	// Port optionally specifies a STUN port to use.
	// Zero means 3478.
	// To disable STUN on this node, use -1.
	STUNPort int `json:",omitempty"`

	// STUNOnly marks a node as only a STUN server and not a DERP
	// server.
	STUNOnly bool `json:",omitempty"`

	// DERPTestPort is used in tests to override the port, instead
	// of using the default port of 443. If non-zero, TLS
	// verification is skipped.
	DERPTestPort int `json:",omitempty"`
}

DERPNode describes a DERP packet relay node running within a DERPRegion.

type DERPRegion added in v0.98.1 

type DERPRegion struct {
	// RegionID is a unique integer for a geographic region.
	//
	// It corresponds to the legacy derpN.tailscale.com hostnames
	// used by older clients. (Older clients will continue to resolve
	// derpN.tailscale.com when contacting peers, rather than use
	// the server-provided DERPMap)
	//
	// RegionIDs must be non-zero, positive, and guaranteed to fit
	// in a JavaScript number.
	RegionID int

	// RegionCode is a short name for the region. It's usually a popular
	// city or airport code in the region: "nyc", "sf", "sin",
	// "fra", etc.
	RegionCode string

	// Nodes are the DERP nodes running in this region, in
	// priority order for the current client. Client TLS
	// connections should ideally only go to the first entry
	// (falling back to the second if necessary). STUN packets
	// should go to the first 1 or 2.
	//
	// If nodes within a region route packets amongst themselves,
	// but not to other regions. That said, each user/domain
	// should get a the same preferred node order, so if all nodes
	// for a user/network pick the first one (as they should, when
	// things are healthy), the inter-cluster routing is minimal
	// to zero.
	Nodes []*DERPNode
}

DERPRegion is a geographic region running DERP relay node(s).

Client nodes discover which region they're closest to, advertise that "home" DERP region (previously called "home node", when there was only 1 node per region) and maintain a persistent connection that region as long as it's the closest. Client nodes will further connect to other regions as necessary to communicate with peers advertising other regions as their homes.

type Debug added in v0.98.1 

type Debug struct {
	// LogHeapPprof controls whether the client should log
	// its heap pprof data. Each true value sent from the server
	// means that client should do one more log.
	LogHeapPprof bool `json:",omitempty"`

	// LogHeapURL is the URL to POST its heap pprof to.
	// Empty means to not log.
	LogHeapURL string `json:",omitempty"`

	// ForceBackgroundSTUN controls whether magicsock should
	// always do its background STUN queries (see magicsock's
	// periodicReSTUN), regardless of inactivity.
	ForceBackgroundSTUN bool `json:",omitempty"`
}

Debug are instructions from the control server to the client to adjust debug settings.

type DiscoKey added in v0.100.0 

type DiscoKey [32]byte

DiscoKey is the curve25519 public key for path discovery key. It's never written to disk or reused between network start-ups.

func (DiscoKey) IsZero added in v0.100.0 

func (k DiscoKey) IsZero() bool

IsZero reports whether k is the zero value.

func (DiscoKey) MarshalText added in v0.100.0 

func (k DiscoKey) MarshalText() ([]byte, error)

func (DiscoKey) ShortString added in v0.100.0 

func (k DiscoKey) ShortString() string

func (DiscoKey) String added in v0.100.0 

func (k DiscoKey) String() string

func (*DiscoKey) UnmarshalText added in v0.100.0 

func (k *DiscoKey) UnmarshalText(text []byte) error

type FilterRule added in v0.98.1 

type FilterRule struct {
	SrcIPs   []string
	SrcBits  []int
	DstPorts []NetPortRange
}

FilterRule represents one rule in a packet filter.

type Group 

type Group struct {
	ID      GroupID
	Name    string
	Members []ID
}

type GroupID 

type GroupID ID

func (GroupID) String 

func (id GroupID) String() string

type Hostinfo 

type Hostinfo struct {
	// TODO(crawshaw): mark all these fields ",omitempty" when all the
	// iOS apps are updated with the latest swift version of this struct.
	IPNVersion    string       // version of this code
	FrontendLogID string       // logtail ID of frontend instance
	BackendLogID  string       // logtail ID of backend instance
	OS            string       // operating system the client runs on (a version.OS value)
	Hostname      string       // name of the host the client runs on
	RoutableIPs   []wgcfg.CIDR `json:",omitempty"` // set of IP ranges this client can route
	RequestTags   []string     `json:",omitempty"` // set of ACL tags this node wants to claim
	Services      []Service    `json:",omitempty"` // services advertised by this machine
	NetInfo       *NetInfo     `json:",omitempty"`
}

Hostinfo contains a summary of a Tailscale host.

Because it contains pointers (slices), this type should not be used as a value type.

func (*Hostinfo) Clone 

func (h *Hostinfo) Clone() (res *Hostinfo)

Clone makes a deep copy of Hostinfo. The result aliases no memory with the original.

func (*Hostinfo) Equal 

func (h *Hostinfo) Equal(h2 *Hostinfo) bool

Equal reports whether h and h2 are equal.

type ID 

type ID int64

func (ID) String 

func (id ID) String() string

type Login 

type Login struct {
	ID            LoginID
	Provider      string
	LoginName     string
	DisplayName   string
	ProfilePicURL string
	Domain        string
	// contains filtered or unexported fields
}

type LoginID 

type LoginID ID

func (LoginID) String 

func (id LoginID) String() string

type MachineKey 

type MachineKey [32]byte

MachineKey is the curve25519 public key for a machine.

func (MachineKey) MarshalText 

func (k MachineKey) MarshalText() ([]byte, error)

func (MachineKey) String 

func (k MachineKey) String() string

func (*MachineKey) UnmarshalText 

func (k *MachineKey) UnmarshalText(text []byte) error

type MachineStatus 

type MachineStatus int

func (MachineStatus) MarshalText 

func (m MachineStatus) MarshalText() ([]byte, error)

func (MachineStatus) String 

func (m MachineStatus) String() string

func (*MachineStatus) UnmarshalText 

func (m *MachineStatus) UnmarshalText(b []byte) error

type MapRequest 

type MapRequest struct {
	Version     int    // current version is 4
	Compress    string // "zstd" or "" (no compression)
	KeepAlive   bool   // server sends keep-alives
	NodeKey     NodeKey
	DiscoKey    DiscoKey
	Endpoints   []string // caller's endpoints (IPv4 or IPv6)
	IncludeIPv6 bool     // include IPv6 endpoints in returned Node Endpoints
	Stream      bool     // if true, multiple MapResponse objects are returned
	Hostinfo    *Hostinfo

	// DebugForceDisco is a temporary flag during the deployment
	// of magicsock active discovery. It says that that the client
	// has environment variables explicitly turning discovery on,
	// so control should not disable it.
	DebugForceDisco bool `json:"debugForceDisco,omitempty"`
}

MapRequest is sent by a client to start a long-poll network map updates. The request includes a copy of the client's current set of WireGuard endpoints and general host information.

The request is encoded to JSON, encrypted with golang.org/x/crypto/nacl/box, using the local machine key, and sent to: 

https://login.tailscale.com/machine/<mkey hex>/map

type MapResponse 

type MapResponse struct {
	KeepAlive bool // if set, all other fields are ignored

	// Networking
	Node        *Node
	Peers       []*Node
	DNS         []wgcfg.IP
	SearchPaths []string
	DERPMap     *DERPMap

	// ACLs
	Domain       string
	PacketFilter []FilterRule
	UserProfiles []UserProfile
	Roles        []Role

	// Debug is normally nil, except for when the control server
	// is setting debug settings on a node.
	Debug *Debug `json:",omitempty"`
}

type NetInfo 

type NetInfo struct {
	// MappingVariesByDestIP says whether the host's NAT mappings
	// vary based on the destination IP.
	MappingVariesByDestIP opt.Bool

	// HairPinning is their router does hairpinning.
	// It reports true even if there's no NAT involved.
	HairPinning opt.Bool

	// WorkingIPv6 is whether IPv6 works.
	WorkingIPv6 opt.Bool

	// WorkingUDP is whether UDP works.
	WorkingUDP opt.Bool

	// PreferredDERP is this node's preferred DERP server
	// for incoming traffic. The node might be be temporarily
	// connected to multiple DERP servers (to send to other nodes)
	// but PreferredDERP is the instance number that the node
	// subscribes to traffic at.
	// Zero means disconnected or unknown.
	PreferredDERP int

	// LinkType is the current link type, if known.
	LinkType string // "wired", "wifi", "mobile" (LTE, 4G, 3G, etc)

	// DERPLatency is the fastest recent time to reach various
	// DERP STUN servers, in seconds. The map key is the
	// "regionID-v4" or "-v6"; it was previously the DERP server's
	// STUN host:port.
	//
	// This should only be updated rarely, or when there's a
	// material change, as any change here also gets uploaded to
	// the control plane.
	DERPLatency map[string]float64 `json:",omitempty"`
}

NetInfo contains information about the host's network state.

func (*NetInfo) BasicallyEqual 

func (ni *NetInfo) BasicallyEqual(ni2 *NetInfo) bool

BasicallyEqual reports whether ni and ni2 are basically equal, ignoring changes in DERP ServerLatency & RegionLatency.

func (*NetInfo) Clone 

func (ni *NetInfo) Clone() (res *NetInfo)

func (*NetInfo) String 

func (ni *NetInfo) String() string

type NetPortRange added in v0.98.1 

type NetPortRange struct {
	IP    string
	Bits  *int // backward compatibility: if missing, means "all" bits
	Ports PortRange
	// contains filtered or unexported fields
}

NetPortRange represents a single subnet:portrange.

type Node 

type Node struct {
	ID         NodeID
	Name       string // DNS
	User       UserID
	Key        NodeKey
	KeyExpiry  time.Time
	Machine    MachineKey
	DiscoKey   DiscoKey
	Addresses  []wgcfg.CIDR // IP addresses of this Node directly
	AllowedIPs []wgcfg.CIDR // range of IP addresses to route to this node
	Endpoints  []string     `json:",omitempty"` // IP+port (public via STUN, and local LANs)
	DERP       string       `json:",omitempty"` // DERP-in-IP:port ("127.3.3.40:N") endpoint
	Hostinfo   Hostinfo
	Created    time.Time
	LastSeen   *time.Time `json:",omitempty"`

	KeepAlive bool // open and keep open a connection to this peer

	MachineAuthorized bool // TODO(crawshaw): replace with MachineStatus

}

func (*Node) Clone 

func (n *Node) Clone() (res *Node)

Clone makes a deep copy of Node. The result aliases no memory with the original.

func (*Node) Equal 

func (n *Node) Equal(n2 *Node) bool

Equal reports whether n and n2 are equal.

type NodeID 

type NodeID ID

func (NodeID) String 

func (id NodeID) String() string

type NodeKey 

type NodeKey [32]byte

NodeKey is the curve25519 public key for a node.

func (NodeKey) IsZero 

func (k NodeKey) IsZero() bool

IsZero reports whether k is the zero value.

func (NodeKey) MarshalText 

func (k NodeKey) MarshalText() ([]byte, error)

func (NodeKey) ShortString added in v0.98.0 

func (k NodeKey) ShortString() string

func (NodeKey) String 

func (k NodeKey) String() string

func (*NodeKey) UnmarshalText 

func (k *NodeKey) UnmarshalText(text []byte) error

type PortRange added in v0.98.1 

type PortRange struct {
	First uint16
	Last  uint16
}

PortRange represents a range of UDP or TCP port numbers.

type RegisterRequest 

type RegisterRequest struct {
	Version    int // currently 1
	NodeKey    NodeKey
	OldNodeKey NodeKey
	Auth       struct {

		// One of Provider/LoginName, Oauth2Token, or AuthKey is set.
		Provider, LoginName string
		Oauth2Token         *oauth2.Token
		AuthKey             string
		// contains filtered or unexported fields
	}
	Expiry   time.Time // requested key expiry, server policy may override
	Followup string    // response waits until AuthURL is visited
	Hostinfo *Hostinfo
	// contains filtered or unexported fields
}

RegisterRequest is sent by a client to register the key for a node. It is encoded to JSON, encrypted with golang.org/x/crypto/nacl/box, using the local machine key, and sent to: 

https://login.tailscale.com/machine/<mkey hex>

func (*RegisterRequest) Clone 

func (req *RegisterRequest) Clone() *RegisterRequest

Clone makes a deep copy of RegisterRequest. The result aliases no memory with the original.

type RegisterResponse 

type RegisterResponse struct {
	User              User
	Login             Login
	NodeKeyExpired    bool   // if true, the NodeKey needs to be replaced
	MachineAuthorized bool   // TODO(crawshaw): move to using MachineStatus
	AuthURL           string // if set, authorization pending
}

RegisterResponse is returned by the server in response to a RegisterRequest.

type Role 

type Role struct {
	ID           RoleID
	Name         string
	Capabilities []CapabilityID
}

type RoleID 

type RoleID ID

func (RoleID) String 

func (id RoleID) String() string

type Service 

type Service struct {
	Proto       ServiceProto // TCP or UDP
	Port        uint16       // port number service is listening on
	Description string       // text description of service
	// contains filtered or unexported fields
}

type ServiceProto 

type ServiceProto string

type User 

type User struct {
	ID            UserID
	LoginName     string `json:"-"` // not stored, filled from Login // TODO REMOVE
	DisplayName   string // if non-empty overrides Login field
	ProfilePicURL string // if non-empty overrides Login field
	Domain        string
	Logins        []LoginID
	Roles         []RoleID
	Created       time.Time
}

User is an IPN user.

A user can have multiple logins associated with it (e.g. gmail and github oauth). (Note: none of our UIs support this yet.)

Some properties are inhereted from the logins and can be overridden, such as display name and profile picture.

Other properties must be the same for all logins associated with a user. In particular: domain. If a user has a "tailscale.io" domain login, they cannot have a general gmail address login associated with the user.

func (*User) Clone 

func (u *User) Clone() *User

Clone returns a copy of u that aliases no memory with the original.

type UserID 

type UserID ID

func (UserID) String 

func (id UserID) String() string

type UserProfile 

type UserProfile struct {
	ID            UserID
	LoginName     string // "alice@smith.com"; for display purposes only (provider is not listed)
	DisplayName   string // "Alice Smith"
	ProfilePicURL string
	Roles         []RoleID
}

A UserProfile is display-friendly data for a user. It includes the LoginName for display purposes but *not* the Provider. It also includes derived data from one of the user's logins.

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