// Copyright (c) Tailscale Inc & AUTHORS // SPDX-License-Identifier: BSD-3-Clause package tailcfg //go:generate go run tailscale.com/cmd/viewer --type=User,Node,Hostinfo,NetInfo,Login,DNSConfig,RegisterResponse,RegisterResponseAuth,RegisterRequest,DERPHomeParams,DERPRegion,DERPMap,DERPNode,SSHRule,SSHAction,SSHPrincipal,ControlDialPlan,Location,UserProfile --clonefunc import ( "bytes" "cmp" "encoding/json" "errors" "fmt" "maps" "net/netip" "reflect" "slices" "strings" "time" "tailscale.com/types/dnstype" "tailscale.com/types/key" "tailscale.com/types/opt" "tailscale.com/types/structs" "tailscale.com/types/tkatype" "tailscale.com/util/dnsname" "tailscale.com/util/slicesx" ) // CapabilityVersion represents the client's capability level. That // is, it can be thought of as the client's simple version number: a // single monotonically increasing integer, rather than the relatively // complex x.y.z-xxxxx semver+hash(es). Whenever the client gains a // capability or wants to negotiate a change in semantics with the // server (control plane), peers (over PeerAPI), or frontend (over // LocalAPI), bump this number and document what's new. // // Previously (prior to 2022-03-06), it was known as the "MapRequest // version" or "mapVer" or "map cap" and that name and usage persists // in places. type CapabilityVersion int // CurrentCapabilityVersion is the current capability version of the codebase. // // History of versions: // // - 3: implicit compression, keep-alives // - 4: opt-in keep-alives via KeepAlive field, opt-in compression via Compress // - 5: 2020-10-19, implies IncludeIPv6, delta Peers/UserProfiles, supports MagicDNS // - 6: 2020-12-07: means MapResponse.PacketFilter nil means unchanged // - 7: 2020-12-15: FilterRule.SrcIPs accepts CIDRs+ranges, doesn't warn about 0.0.0.0/:: // - 8: 2020-12-19: client can buggily receive IPv6 addresses and routes if beta enabled server-side // - 9: 2020-12-30: client doesn't auto-add implicit search domains from peers; only DNSConfig.Domains // - 10: 2021-01-17: client understands MapResponse.PeerSeenChange // - 11: 2021-03-03: client understands IPv6, multiple default routes, and goroutine dumping // - 12: 2021-03-04: client understands PingRequest // - 13: 2021-03-19: client understands FilterRule.IPProto // - 14: 2021-04-07: client understands DNSConfig.Routes and DNSConfig.Resolvers // - 15: 2021-04-12: client treats nil MapResponse.DNSConfig as meaning unchanged // - 16: 2021-04-15: client understands Node.Online, MapResponse.OnlineChange // - 17: 2021-04-18: MapResponse.Domain empty means unchanged // - 18: 2021-04-19: MapResponse.Node nil means unchanged (all fields now omitempty) // - 19: 2021-04-21: MapResponse.Debug.SleepSeconds // - 20: 2021-06-11: MapResponse.LastSeen used even less (https://github.com/tailscale/tailscale/issues/2107) // - 21: 2021-06-15: added MapResponse.DNSConfig.CertDomains // - 22: 2021-06-16: added MapResponse.DNSConfig.ExtraRecords // - 23: 2021-08-25: DNSConfig.Routes values may be empty (for ExtraRecords support in 1.14.1+) // - 24: 2021-09-18: MapResponse.Health from control to node; node shows in "tailscale status" // - 25: 2021-11-01: MapResponse.Debug.Exit // - 26: 2022-01-12: (nothing, just bumping for 1.20.0) // - 27: 2022-02-18: start of SSHPolicy being respected // - 28: 2022-03-09: client can communicate over Noise. // - 29: 2022-03-21: MapResponse.PopBrowserURL // - 30: 2022-03-22: client can request id tokens. // - 31: 2022-04-15: PingRequest & PingResponse TSMP & disco support // - 32: 2022-04-17: client knows FilterRule.CapMatch // - 33: 2022-07-20: added MapResponse.PeersChangedPatch (DERPRegion + Endpoints) // - 34: 2022-08-02: client understands CapabilityFileSharingTarget // - 36: 2022-08-02: added PeersChangedPatch.{Key,DiscoKey,Online,LastSeen,KeyExpiry,Capabilities} // - 37: 2022-08-09: added Debug.{SetForceBackgroundSTUN,SetRandomizeClientPort}; Debug are sticky // - 38: 2022-08-11: added PingRequest.URLIsNoise // - 39: 2022-08-15: clients can talk Noise over arbitrary HTTPS port // - 40: 2022-08-22: added Node.KeySignature, PeersChangedPatch.KeySignature // - 41: 2022-08-30: uses 100.100.100.100 for route-less ExtraRecords if global nameservers is set // - 42: 2022-09-06: NextDNS DoH support; see https://github.com/tailscale/tailscale/pull/5556 // - 43: 2022-09-21: clients can return usernames for SSH // - 44: 2022-09-22: MapResponse.ControlDialPlan // - 45: 2022-09-26: c2n /debug/{goroutines,prefs,metrics} // - 46: 2022-10-04: c2n /debug/component-logging // - 47: 2022-10-11: Register{Request,Response}.NodeKeySignature // - 48: 2022-11-02: Node.UnsignedPeerAPIOnly // - 49: 2022-11-03: Client understands EarlyNoise // - 50: 2022-11-14: Client understands CapabilityIngress // - 51: 2022-11-30: Client understands CapabilityTailnetLockAlpha // - 52: 2023-01-05: client can handle c2n POST /logtail/flush // - 53: 2023-01-18: client respects explicit Node.Expired + auto-sets based on Node.KeyExpiry // - 54: 2023-01-19: Node.Cap added, PeersChangedPatch.Cap, uses Node.Cap for ExitDNS before Hostinfo.Services fallback // - 55: 2023-01-23: start of c2n GET+POST /update handler // - 56: 2023-01-24: Client understands CapabilityDebugTSDNSResolution // - 57: 2023-01-25: Client understands CapabilityBindToInterfaceByRoute // - 58: 2023-03-10: Client retries lite map updates before restarting map poll. // - 59: 2023-03-16: Client understands Peers[].SelfNodeV4MasqAddrForThisPeer // - 60: 2023-04-06: Client understands IsWireGuardOnly // - 61: 2023-04-18: Client understand SSHAction.SSHRecorderFailureAction // - 62: 2023-05-05: Client can notify control over noise for SSHEventNotificationRequest recording failure events // - 63: 2023-06-08: Client understands SSHAction.AllowRemotePortForwarding. // - 64: 2023-07-11: Client understands s/CapabilityTailnetLockAlpha/CapabilityTailnetLock // - 65: 2023-07-12: Client understands DERPMap.HomeParams + incremental DERPMap updates with params // - 66: 2023-07-23: UserProfile.Groups added (available via WhoIs) (removed in 87) // - 67: 2023-07-25: Client understands PeerCapMap // - 68: 2023-08-09: Client has dedicated updateRoutine; MapRequest.Stream true means ignore Hostinfo+Endpoints // - 69: 2023-08-16: removed Debug.LogHeap* + GoroutineDumpURL; added c2n /debug/logheap // - 70: 2023-08-16: removed most Debug fields; added NodeAttrDisable*, NodeAttrDebug* instead // - 71: 2023-08-17: added NodeAttrOneCGNATEnable, NodeAttrOneCGNATDisable // - 72: 2023-08-23: TS-2023-006 UPnP issue fixed; UPnP can now be used again // - 73: 2023-09-01: Non-Windows clients expect to receive ClientVersion // - 74: 2023-09-18: Client understands NodeCapMap // - 75: 2023-09-12: Client understands NodeAttrDNSForwarderDisableTCPRetries // - 76: 2023-09-20: Client understands ExitNodeDNSResolvers for IsWireGuardOnly nodes // - 77: 2023-10-03: Client understands Peers[].SelfNodeV6MasqAddrForThisPeer // - 78: 2023-10-05: can handle c2n Wake-on-LAN sending // - 79: 2023-10-05: Client understands UrgentSecurityUpdate in ClientVersion // - 80: 2023-11-16: can handle c2n GET /tls-cert-status // - 81: 2023-11-17: MapResponse.PacketFilters (incremental packet filter updates) // - 82: 2023-12-01: Client understands NodeAttrLinuxMustUseIPTables, NodeAttrLinuxMustUseNfTables, c2n /netfilter-kind // - 83: 2023-12-18: Client understands DefaultAutoUpdate // - 84: 2024-01-04: Client understands SeamlessKeyRenewal // - 85: 2024-01-05: Client understands MaxKeyDuration // - 86: 2024-01-23: Client understands NodeAttrProbeUDPLifetime // - 87: 2024-02-11: UserProfile.Groups removed (added in 66) // - 88: 2024-03-05: Client understands NodeAttrSuggestExitNode // - 89: 2024-03-23: Client no longer respects deleted PeerChange.Capabilities (use CapMap) // - 90: 2024-04-03: Client understands PeerCapabilityTaildrive. const CurrentCapabilityVersion CapabilityVersion = 90 type StableID string type ID int64 type UserID ID func (u UserID) IsZero() bool { return u == 0 } type LoginID ID func (u LoginID) IsZero() bool { return u == 0 } type NodeID ID func (u NodeID) IsZero() bool { return u == 0 } type StableNodeID StableID func (u StableNodeID) IsZero() bool { return u == "" } // 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 inherited 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. 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 Logins []LoginID Created time.Time } type Login struct { _ structs.Incomparable ID LoginID Provider string LoginName string DisplayName string ProfilePicURL string } // 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. 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 exists for legacy reasons, to keep old macOS clients // happy. It JSON marshals as []. Roles emptyStructJSONSlice } func (p *UserProfile) Equal(p2 *UserProfile) bool { if p == nil && p2 == nil { return true } if p == nil || p2 == nil { return false } return p.ID == p2.ID && p.LoginName == p2.LoginName && p.DisplayName == p2.DisplayName && p.ProfilePicURL == p2.ProfilePicURL } type emptyStructJSONSlice struct{} var emptyJSONSliceBytes = []byte("[]") func (emptyStructJSONSlice) MarshalJSON() ([]byte, error) { return emptyJSONSliceBytes, nil } func (emptyStructJSONSlice) UnmarshalJSON([]byte) error { return nil } // RawMessage is a raw encoded JSON value. It implements Marshaler and // Unmarshaler and can be used to delay JSON decoding or precompute a JSON // encoding. // // It is like json.RawMessage but is a string instead of a []byte to better // portray immutable data. type RawMessage string // MarshalJSON returns m as the JSON encoding of m. func (m RawMessage) MarshalJSON() ([]byte, error) { if m == "" { return []byte("null"), nil } return []byte(m), nil } // UnmarshalJSON sets *m to a copy of data. func (m *RawMessage) UnmarshalJSON(data []byte) error { if m == nil { return errors.New("RawMessage: UnmarshalJSON on nil pointer") } *m = RawMessage(data) return nil } type Node struct { ID NodeID StableID StableNodeID // Name is the FQDN of the node. // It is also the MagicDNS name for the node. // It has a trailing dot. // e.g. "host.tail-scale.ts.net." Name string // User is the user who created the node. If ACL tags are in use for the // node then it doesn't reflect the ACL identity that the node is running // as. User UserID // Sharer, if non-zero, is the user who shared this node, if different than User. Sharer UserID `json:",omitempty"` Key key.NodePublic KeyExpiry time.Time // the zero value if this node does not expire KeySignature tkatype.MarshaledSignature `json:",omitempty"` Machine key.MachinePublic DiscoKey key.DiscoPublic Addresses []netip.Prefix // IP addresses of this Node directly AllowedIPs []netip.Prefix // range of IP addresses to route to this node Endpoints []netip.AddrPort `json:",omitempty"` // IP+port (public via STUN, and local LANs) // DERP is this node's home DERP region ID integer, but shoved into an // IP:port string for legacy reasons. The IP address is always "127.3.3.40" // (a loopback address (127) followed by the digits over the letters DERP on // a QWERTY keyboard (3.3.40)). The "port number" is the home DERP region ID // integer. // // TODO(bradfitz): simplify this legacy mess; add a new HomeDERPRegionID int // field behind a new capver bump. DERP string `json:",omitempty"` // DERP-in-IP:port ("127.3.3.40:N") endpoint Hostinfo HostinfoView Created time.Time Cap CapabilityVersion `json:",omitempty"` // if non-zero, the node's capability version; old servers might not send // Tags are the list of ACL tags applied to this node. // Tags take the form of `tag:` where value starts // with a letter and only contains alphanumerics and dashes `-`. // Some valid tag examples: // `tag:prod` // `tag:database` // `tag:lab-1` Tags []string `json:",omitempty"` // PrimaryRoutes are the routes from AllowedIPs that this node // is currently the primary subnet router for, as determined // by the control plane. It does not include the self address // values from Addresses that are in AllowedIPs. PrimaryRoutes []netip.Prefix `json:",omitempty"` // LastSeen is when the node was last online. It is not // updated when Online is true. It is nil if the current // node doesn't have permission to know, or the node // has never been online. LastSeen *time.Time `json:",omitempty"` // Online is whether the node is currently connected to the // coordination server. A value of nil means unknown, or the // current node doesn't have permission to know. Online *bool `json:",omitempty"` MachineAuthorized bool `json:",omitempty"` // TODO(crawshaw): replace with MachineStatus // Capabilities are capabilities that the node has. // They're free-form strings, but should be in the form of URLs/URIs // such as: // "https://tailscale.com/cap/is-admin" // "https://tailscale.com/cap/file-sharing" // // Deprecated: use CapMap instead. See https://github.com/tailscale/tailscale/issues/11508 Capabilities []NodeCapability `json:",omitempty"` // CapMap is a map of capabilities to their optional argument/data values. // // It is valid for a capability to not have any argument/data values; such // capabilities can be tested for using the HasCap method. These type of // capabilities are used to indicate that a node has a capability, but there // is no additional data associated with it. These were previously // represented by the Capabilities field, but can now be represented by // CapMap with an empty value. // // See NodeCapability for more information on keys. CapMap NodeCapMap `json:",omitempty"` // UnsignedPeerAPIOnly means that this node is not signed nor subject to TKA // restrictions. However, in exchange for that privilege, it does not get // network access. It can only access this node's peerapi, which may not let // it do anything. It is the tailscaled client's job to double-check the // MapResponse's PacketFilter to verify that its AllowedIPs will not be // accepted by the packet filter. UnsignedPeerAPIOnly bool `json:",omitempty"` // The following three computed fields hold the various names that can // be used for this node in UIs. They are populated from controlclient // (not from control) by calling node.InitDisplayNames. These can be // used directly or accessed via node.DisplayName or node.DisplayNames. ComputedName string `json:",omitempty"` // MagicDNS base name (for normal non-shared-in nodes), FQDN (without trailing dot, for shared-in nodes), or Hostname (if no MagicDNS) computedHostIfDifferent string // hostname, if different than ComputedName, otherwise empty ComputedNameWithHost string `json:",omitempty"` // either "ComputedName" or "ComputedName (computedHostIfDifferent)", if computedHostIfDifferent is set // DataPlaneAuditLogID is the per-node logtail ID used for data plane audit logging. DataPlaneAuditLogID string `json:",omitempty"` // Expired is whether this node's key has expired. Control may send // this; clients are only allowed to set this from false to true. On // the client, this is calculated client-side based on a timestamp sent // from control, to avoid clock skew issues. Expired bool `json:",omitempty"` // SelfNodeV4MasqAddrForThisPeer is the IPv4 that this peer knows the current node as. // It may be empty if the peer knows the current node by its native // IPv4 address. // This field is only populated in a MapResponse for peers and not // for the current node. // // If set, it should be used to masquerade traffic originating from the // current node to this peer. The masquerade address is only relevant // for this peer and not for other peers. // // This only applies to traffic originating from the current node to the // peer or any of its subnets. Traffic originating from subnet routes will // not be masqueraded (e.g. in case of --snat-subnet-routes). SelfNodeV4MasqAddrForThisPeer *netip.Addr `json:",omitempty"` // SelfNodeV6MasqAddrForThisPeer is the IPv6 that this peer knows the current node as. // It may be empty if the peer knows the current node by its native // IPv6 address. // This field is only populated in a MapResponse for peers and not // for the current node. // // If set, it should be used to masquerade traffic originating from the // current node to this peer. The masquerade address is only relevant // for this peer and not for other peers. // // This only applies to traffic originating from the current node to the // peer or any of its subnets. Traffic originating from subnet routes will // not be masqueraded (e.g. in case of --snat-subnet-routes). SelfNodeV6MasqAddrForThisPeer *netip.Addr `json:",omitempty"` // IsWireGuardOnly indicates that this is a non-Tailscale WireGuard peer, it // is not expected to speak Disco or DERP, and it must have Endpoints in // order to be reachable. IsWireGuardOnly bool `json:",omitempty"` // ExitNodeDNSResolvers is the list of DNS servers that should be used when this // node is marked IsWireGuardOnly and being used as an exit node. ExitNodeDNSResolvers []*dnstype.Resolver `json:",omitempty"` } // HasCap reports whether the node has the given capability. // It is safe to call on an invalid NodeView. func (v NodeView) HasCap(cap NodeCapability) bool { return v.ж.HasCap(cap) } // HasCap reports whether the node has the given capability. // It is safe to call on a nil Node. func (v *Node) HasCap(cap NodeCapability) bool { return v != nil && v.CapMap.Contains(cap) } // DisplayName returns the user-facing name for a node which should // be shown in client UIs. // // Parameter forOwner specifies whether the name is requested by // the owner of the node. When forOwner is false, the hostname is // never included in the return value. // // Return value is either "Name" or "Name (Hostname)", where // Name is the node's MagicDNS base name (for normal non-shared-in // nodes), FQDN (without trailing dot, for shared-in nodes), or // Hostname (if no MagicDNS). Hostname is only included in the // return value if it varies from Name and forOwner is provided true. // // DisplayName is only valid if InitDisplayNames has been called. func (n *Node) DisplayName(forOwner bool) string { if forOwner { return n.ComputedNameWithHost } return n.ComputedName } // DisplayName returns the decomposed user-facing name for a node. // // Parameter forOwner specifies whether the name is requested by // the owner of the node. When forOwner is false, hostIfDifferent // is always returned empty. // // Return value name is the node's primary name, populated with the // node's MagicDNS base name (for normal non-shared-in nodes), FQDN // (without trailing dot, for shared-in nodes), or Hostname (if no // MagicDNS). // // Return value hostIfDifferent, when non-empty, is the node's // hostname. hostIfDifferent is only populated when the hostname // varies from name and forOwner is provided as true. // // DisplayNames is only valid if InitDisplayNames has been called. func (n *Node) DisplayNames(forOwner bool) (name, hostIfDifferent string) { if forOwner { return n.ComputedName, n.computedHostIfDifferent } return n.ComputedName, "" } // IsTagged reports whether the node has any tags. func (n *Node) IsTagged() bool { return len(n.Tags) > 0 } // SharerOrUser Sharer if set, else User. func (n *Node) SharerOrUser() UserID { return cmp.Or(n.Sharer, n.User) } // IsTagged reports whether the node has any tags. func (n NodeView) IsTagged() bool { return n.ж.IsTagged() } // DisplayName wraps Node.DisplayName. func (n NodeView) DisplayName(forOwner bool) string { return n.ж.DisplayName(forOwner) } // SharerOrUser wraps Node.SharerOrUser. func (n NodeView) SharerOrUser() UserID { return n.ж.SharerOrUser() } // InitDisplayNames computes and populates n's display name // fields: n.ComputedName, n.computedHostIfDifferent, and // n.ComputedNameWithHost. func (n *Node) InitDisplayNames(networkMagicDNSSuffix string) { name := dnsname.TrimSuffix(n.Name, networkMagicDNSSuffix) var hostIfDifferent string if n.Hostinfo.Valid() { hostIfDifferent = dnsname.SanitizeHostname(n.Hostinfo.Hostname()) } if strings.EqualFold(name, hostIfDifferent) { hostIfDifferent = "" } if name == "" { if hostIfDifferent != "" { name = hostIfDifferent hostIfDifferent = "" } else { name = n.Key.String() } } var nameWithHost string if hostIfDifferent != "" { nameWithHost = fmt.Sprintf("%s (%s)", name, hostIfDifferent) } else { nameWithHost = name } n.ComputedName = name n.computedHostIfDifferent = hostIfDifferent n.ComputedNameWithHost = nameWithHost } type MachineStatus int const ( MachineUnknown = MachineStatus(iota) MachineUnauthorized // server has yet to approve MachineAuthorized // server has approved MachineInvalid // server has explicitly rejected this machine key ) func (m MachineStatus) AppendText(b []byte) ([]byte, error) { return append(b, m.String()...), nil } func (m MachineStatus) MarshalText() ([]byte, error) { return []byte(m.String()), nil } func (m *MachineStatus) UnmarshalText(b []byte) error { switch string(b) { case "machine-unknown": *m = MachineUnknown case "machine-unauthorized": *m = MachineUnauthorized case "machine-authorized": *m = MachineAuthorized case "machine-invalid": *m = MachineInvalid default: var val int if _, err := fmt.Sscanf(string(b), "machine-unknown(%d)", &val); err != nil { *m = MachineStatus(val) } else { *m = MachineUnknown } } return nil } func (m MachineStatus) String() string { switch m { case MachineUnknown: return "machine-unknown" case MachineUnauthorized: return "machine-unauthorized" case MachineAuthorized: return "machine-authorized" case MachineInvalid: return "machine-invalid" default: return fmt.Sprintf("machine-unknown(%d)", int(m)) } } func isNum(b byte) bool { return b >= '0' && b <= '9' } func isAlpha(b byte) bool { return (b >= 'A' && b <= 'Z') || (b >= 'a' && b <= 'z') } // CheckTag validates tag for use 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. func CheckTag(tag string) error { if !strings.HasPrefix(tag, "tag:") { return errors.New("tags must start with 'tag:'") } tag = tag[4:] if tag == "" { return errors.New("tag names must not be empty") } if !isAlpha(tag[0]) { return errors.New("tag names must start with a letter, after 'tag:'") } for _, b := range []byte(tag) { if !isNum(b) && !isAlpha(b) && b != '-' { return errors.New("tag names can only contain numbers, letters, or dashes") } } return nil } // CheckRequestTags checks that all of h.RequestTags are valid. func (h *Hostinfo) CheckRequestTags() error { if h == nil { return nil } for _, tag := range h.RequestTags { if err := CheckTag(tag); err != nil { return fmt.Errorf("tag(%#v): %w", tag, err) } } return nil } // ServiceProto is a service type. It's usually // TCP ("tcp") or UDP ("udp"), but it can also have // meta service values as defined in Service.Proto. type ServiceProto string const ( TCP = ServiceProto("tcp") UDP = ServiceProto("udp") PeerAPI4 = ServiceProto("peerapi4") PeerAPI6 = ServiceProto("peerapi6") PeerAPIDNS = ServiceProto("peerapi-dns-proxy") ) // Service represents a service running on a node. type Service struct { _ structs.Incomparable // Proto is the type of service. It's usually the constant TCP // or UDP ("tcp" or "udp"), but it can also be one of the // following meta service values: // // * "peerapi4": peerapi is available on IPv4; Port is the // port number that the peerapi is running on the // node's Tailscale IPv4 address. // * "peerapi6": peerapi is available on IPv6; Port is the // port number that the peerapi is running on the // node's Tailscale IPv6 address. // * "peerapi-dns-proxy": the local peerapi service supports // being a DNS proxy (when the node is an exit // node). For this service, the Port number is really // the version number of the service. Proto ServiceProto // Port is the port number. // // For Proto "peerapi-dns", it's the version number of the DNS proxy, // currently 1. Port uint16 // Description is the textual description of the service, // usually the process name that's running. Description string `json:",omitempty"` // TODO(apenwarr): allow advertising services on subnet IPs? // TODO(apenwarr): add "tags" here for each service? } // Location represents geographical location data about a // Tailscale host. Location is optional and only set if // explicitly declared by a node. type Location struct { Country string `json:",omitempty"` // User friendly country name, with proper capitalization ("Canada") CountryCode string `json:",omitempty"` // ISO 3166-1 alpha-2 in upper case ("CA") City string `json:",omitempty"` // User friendly city name, with proper capitalization ("Squamish") // CityCode is a short code representing the city in upper case. // CityCode is used to disambiguate a city from another location // with the same city name. It uniquely identifies a particular // geographical location, within the tailnet. // IATA, ICAO or ISO 3166-2 codes are recommended ("YSE") CityCode string `json:",omitempty"` // Latitude, Longitude are optional geographical coordinates of the node, in degrees. // No particular accuracy level is promised; the coordinates may simply be the center of the city or country. Latitude float64 `json:",omitempty"` Longitude float64 `json:",omitempty"` // Priority determines the order of use of an exit node when a // location based preference matches more than one exit node, // the node with the highest priority wins. Nodes of equal // probability may be selected arbitrarily. // // A value of 0 means the exit node does not have a priority // preference. A negative int is not allowed. Priority int `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. type Hostinfo struct { IPNVersion string `json:",omitempty"` // version of this code (in version.Long format) FrontendLogID string `json:",omitempty"` // logtail ID of frontend instance BackendLogID string `json:",omitempty"` // logtail ID of backend instance OS string `json:",omitempty"` // operating system the client runs on (a version.OS value) // OSVersion is the version of the OS, if available. // // For Android, it's like "10", "11", "12", etc. For iOS and macOS it's like // "15.6.1" or "12.4.0". For Windows it's like "10.0.19044.1889". For // FreeBSD it's like "12.3-STABLE". // // For Linux, prior to Tailscale 1.32, we jammed a bunch of fields into this // string on Linux, like "Debian 10.4; kernel=xxx; container; env=kn" and so // on. As of Tailscale 1.32, this is simply the kernel version on Linux, like // "5.10.0-17-amd64". OSVersion string `json:",omitempty"` Container opt.Bool `json:",omitempty"` // whether the client is running in a container Env string `json:",omitempty"` // a hostinfo.EnvType in string form Distro string `json:",omitempty"` // "debian", "ubuntu", "nixos", ... DistroVersion string `json:",omitempty"` // "20.04", ... DistroCodeName string `json:",omitempty"` // "jammy", "bullseye", ... // App is used to disambiguate Tailscale clients that run using tsnet. App string `json:",omitempty"` // "k8s-operator", "golinks", ... Desktop opt.Bool `json:",omitempty"` // if a desktop was detected on Linux Package string `json:",omitempty"` // Tailscale package to disambiguate ("choco", "appstore", etc; "" for unknown) DeviceModel string `json:",omitempty"` // mobile phone model ("Pixel 3a", "iPhone12,3") PushDeviceToken string `json:",omitempty"` // macOS/iOS APNs device token for notifications (and Android in the future) Hostname string `json:",omitempty"` // name of the host the client runs on ShieldsUp bool `json:",omitempty"` // indicates whether the host is blocking incoming connections ShareeNode bool `json:",omitempty"` // indicates this node exists in netmap because it's owned by a shared-to user NoLogsNoSupport bool `json:",omitempty"` // indicates that the user has opted out of sending logs and support WireIngress bool `json:",omitempty"` // indicates that the node wants the option to receive ingress connections AllowsUpdate bool `json:",omitempty"` // indicates that the node has opted-in to admin-console-drive remote updates Machine string `json:",omitempty"` // the current host's machine type (uname -m) GoArch string `json:",omitempty"` // GOARCH value (of the built binary) GoArchVar string `json:",omitempty"` // GOARM, GOAMD64, etc (of the built binary) GoVersion string `json:",omitempty"` // Go version binary was built with RoutableIPs []netip.Prefix `json:",omitempty"` // set of IP ranges this client can route RequestTags []string `json:",omitempty"` // set of ACL tags this node wants to claim WoLMACs []string `json:",omitempty"` // MAC address(es) to send Wake-on-LAN packets to wake this node (lowercase hex w/ colons) Services []Service `json:",omitempty"` // services advertised by this machine NetInfo *NetInfo `json:",omitempty"` SSH_HostKeys []string `json:"sshHostKeys,omitempty"` // if advertised Cloud string `json:",omitempty"` Userspace opt.Bool `json:",omitempty"` // if the client is running in userspace (netstack) mode UserspaceRouter opt.Bool `json:",omitempty"` // if the client's subnet router is running in userspace (netstack) mode AppConnector opt.Bool `json:",omitempty"` // if the client is running the app-connector service // Location represents geographical location data about a // Tailscale host. Location is optional and only set if // explicitly declared by a node. Location *Location `json:",omitempty"` // NOTE: any new fields containing pointers in this type // require changes to Hostinfo.Equal. } // TailscaleSSHEnabled reports whether or not this node is acting as a // Tailscale SSH server. func (hi *Hostinfo) TailscaleSSHEnabled() bool { // Currently, we use `SSH_HostKeys` as a proxy for this. However, we may later // include non-Tailscale host keys, and will add a separate flag to rely on. return hi != nil && len(hi.SSH_HostKeys) > 0 } func (v HostinfoView) TailscaleSSHEnabled() bool { return v.ж.TailscaleSSHEnabled() } // TailscaleFunnelEnabled reports whether or not this node has explicitly // enabled Funnel. func (hi *Hostinfo) TailscaleFunnelEnabled() bool { return hi != nil && hi.WireIngress } func (v HostinfoView) TailscaleFunnelEnabled() bool { return v.ж.TailscaleFunnelEnabled() } // NetInfo contains information about the host's network state. 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 the host has IPv6 internet connectivity. WorkingIPv6 opt.Bool // OSHasIPv6 is whether the OS supports IPv6 at all, regardless of // whether IPv6 internet connectivity is available. OSHasIPv6 opt.Bool // WorkingUDP is whether the host has UDP internet connectivity. WorkingUDP opt.Bool // WorkingICMPv4 is whether ICMPv4 works. // Empty means not checked. WorkingICMPv4 opt.Bool // HavePortMap is whether we have an existing portmap open // (UPnP, PMP, or PCP). HavePortMap bool `json:",omitempty"` // UPnP is whether UPnP appears present on the LAN. // Empty means not checked. UPnP opt.Bool // PMP is whether NAT-PMP appears present on the LAN. // Empty means not checked. PMP opt.Bool // PCP is whether PCP appears present on the LAN. // Empty means not checked. PCP opt.Bool // PreferredDERP is this node's preferred (home) DERP region ID. // This is where the node expects to be contacted to begin a // peer-to-peer connection. The node might be be temporarily // connected to multiple DERP servers (to speak to other nodes // that are located elsewhere) but PreferredDERP is the region ID // that the node subscribes to traffic at. // Zero means disconnected or unknown. PreferredDERP int // LinkType is the current link type, if known. LinkType string `json:",omitempty"` // "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"` // FirewallMode encodes both which firewall mode was selected and why. // It is Linux-specific (at least as of 2023-08-19) and is meant to help // debug iptables-vs-nftables issues. The string is of the form // "{nft,ift}-REASON", like "nft-forced" or "ipt-default". Empty means // either not Linux or a configuration in which the host firewall rules // are not managed by tailscaled. FirewallMode string `json:",omitempty"` // Update BasicallyEqual when adding fields. } func (ni *NetInfo) String() string { if ni == nil { return "NetInfo(nil)" } return fmt.Sprintf("NetInfo{varies=%v hairpin=%v ipv6=%v ipv6os=%v udp=%v icmpv4=%v derp=#%v portmap=%v link=%q firewallmode=%q}", ni.MappingVariesByDestIP, ni.HairPinning, ni.WorkingIPv6, ni.OSHasIPv6, ni.WorkingUDP, ni.WorkingICMPv4, ni.PreferredDERP, ni.portMapSummary(), ni.LinkType, ni.FirewallMode) } func (ni *NetInfo) portMapSummary() string { if !ni.HavePortMap && ni.UPnP == "" && ni.PMP == "" && ni.PCP == "" { return "?" } var prefix string if ni.HavePortMap { prefix = "active-" } return prefix + conciseOptBool(ni.UPnP, "U") + conciseOptBool(ni.PMP, "M") + conciseOptBool(ni.PCP, "C") } func conciseOptBool(b opt.Bool, trueVal string) string { if b == "" { return "_" } v, ok := b.Get() if !ok { return "x" } if v { return trueVal } return "" } // BasicallyEqual reports whether ni and ni2 are basically equal, ignoring // changes in DERP ServerLatency & RegionLatency. func (ni *NetInfo) BasicallyEqual(ni2 *NetInfo) bool { if (ni == nil) != (ni2 == nil) { return false } if ni == nil { return true } return ni.MappingVariesByDestIP == ni2.MappingVariesByDestIP && ni.HairPinning == ni2.HairPinning && ni.WorkingIPv6 == ni2.WorkingIPv6 && ni.OSHasIPv6 == ni2.OSHasIPv6 && ni.WorkingUDP == ni2.WorkingUDP && ni.WorkingICMPv4 == ni2.WorkingICMPv4 && ni.HavePortMap == ni2.HavePortMap && ni.UPnP == ni2.UPnP && ni.PMP == ni2.PMP && ni.PCP == ni2.PCP && ni.PreferredDERP == ni2.PreferredDERP && ni.LinkType == ni2.LinkType && ni.FirewallMode == ni2.FirewallMode } // Equal reports whether h and h2 are equal. func (h *Hostinfo) Equal(h2 *Hostinfo) bool { if h == nil && h2 == nil { return true } if (h == nil) != (h2 == nil) { return false } return reflect.DeepEqual(h, h2) } // HowUnequal returns a list of paths through Hostinfo where h and h2 differ. // If they differ in nil-ness, the path is "nil", otherwise the path is like // "ShieldsUp" or "NetInfo.nil" or "NetInfo.PCP". func (h *Hostinfo) HowUnequal(h2 *Hostinfo) (path []string) { return appendStructPtrDiff(nil, "", reflect.ValueOf(h), reflect.ValueOf(h2)) } func appendStructPtrDiff(base []string, pfx string, p1, p2 reflect.Value) (ret []string) { ret = base if p1.IsNil() && p2.IsNil() { return base } mkPath := func(b string) string { if pfx == "" { return b } return pfx + "." + b } if p1.IsNil() || p2.IsNil() { return append(base, mkPath("nil")) } v1, v2 := p1.Elem(), p2.Elem() t := v1.Type() for i, n := 0, t.NumField(); i < n; i++ { sf := t.Field(i) switch sf.Type.Kind() { case reflect.String: if v1.Field(i).String() != v2.Field(i).String() { ret = append(ret, mkPath(sf.Name)) } continue case reflect.Bool: if v1.Field(i).Bool() != v2.Field(i).Bool() { ret = append(ret, mkPath(sf.Name)) } continue case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: if v1.Field(i).Int() != v2.Field(i).Int() { ret = append(ret, mkPath(sf.Name)) } continue case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: if v1.Field(i).Uint() != v2.Field(i).Uint() { ret = append(ret, mkPath(sf.Name)) } continue case reflect.Slice, reflect.Map: if !reflect.DeepEqual(v1.Field(i).Interface(), v2.Field(i).Interface()) { ret = append(ret, mkPath(sf.Name)) } continue case reflect.Ptr: if sf.Type.Elem().Kind() == reflect.Struct { ret = appendStructPtrDiff(ret, sf.Name, v1.Field(i), v2.Field(i)) continue } } panic(fmt.Sprintf("unsupported type at %s: %s", mkPath(sf.Name), sf.Type.String())) } return ret } // SignatureType specifies a scheme for signing RegisterRequest messages. It // specifies the crypto algorithms to use, the contents of what is signed, and // any other relevant details. Historically, requests were unsigned so the zero // value is SignatureNone. type SignatureType int const ( // SignatureNone indicates that there is no signature, no Timestamp is // required (but may be specified if desired), and both DeviceCert and // Signature should be empty. SignatureNone = SignatureType(iota) // SignatureUnknown represents an unknown signature scheme, which should // be considered an error if seen. SignatureUnknown // SignatureV1 is computed as RSA-PSS-Sign(privateKeyForDeviceCert, // SHA256(Timestamp || ServerIdentity || DeviceCert || ServerShortPubKey || // MachineShortPubKey)). The PSS salt length is equal to hash length // (rsa.PSSSaltLengthEqualsHash). Device cert is required. // Deprecated: uses old key serialization format. SignatureV1 // SignatureV2 is computed as RSA-PSS-Sign(privateKeyForDeviceCert, // SHA256(Timestamp || ServerIdentity || DeviceCert || ServerPubKey || // MachinePubKey)). The PSS salt length is equal to hash length // (rsa.PSSSaltLengthEqualsHash). Device cert is required. SignatureV2 ) func (st SignatureType) AppendText(b []byte) ([]byte, error) { return append(b, st.String()...), nil } func (st SignatureType) MarshalText() ([]byte, error) { return []byte(st.String()), nil } func (st *SignatureType) UnmarshalText(b []byte) error { switch string(b) { case "signature-none": *st = SignatureNone case "signature-v1": *st = SignatureV1 case "signature-v2": *st = SignatureV2 default: var val int if _, err := fmt.Sscanf(string(b), "signature-unknown(%d)", &val); err != nil { *st = SignatureType(val) } else { *st = SignatureUnknown } } return nil } func (st SignatureType) String() string { switch st { case SignatureNone: return "signature-none" case SignatureUnknown: return "signature-unknown" case SignatureV1: return "signature-v1" case SignatureV2: return "signature-v2" default: return fmt.Sprintf("signature-unknown(%d)", int(st)) } } // RegisterResponseAuth is the authentication information returned by the server // in response to a RegisterRequest. type RegisterResponseAuth struct { _ structs.Incomparable // One of Provider/LoginName, Oauth2Token, or AuthKey is set. Provider, LoginName string Oauth2Token *Oauth2Token AuthKey string } // 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/ type RegisterRequest struct { _ structs.Incomparable // Version is the client's capabilities when using the Noise // transport. // // When using the original nacl crypto_box transport, the // value must be 1. Version CapabilityVersion NodeKey key.NodePublic OldNodeKey key.NodePublic NLKey key.NLPublic Auth RegisterResponseAuth // Expiry optionally specifies the requested key expiry. // The server policy may override. // As a special case, if Expiry is in the past and NodeKey is // the node's current key, the key is expired. Expiry time.Time Followup string // response waits until AuthURL is visited Hostinfo *Hostinfo // Ephemeral is whether the client is requesting that this // node be considered ephemeral and be automatically deleted // when it stops being active. Ephemeral bool `json:",omitempty"` // NodeKeySignature is the node's own node-key signature, re-signed // for its new node key using its network-lock key. // // This field is set when the client retries registration after learning // its NodeKeySignature (which is in need of rotation). NodeKeySignature tkatype.MarshaledSignature // The following fields are not used for SignatureNone and are required for // SignatureV1: SignatureType SignatureType `json:",omitempty"` Timestamp *time.Time `json:",omitempty"` // creation time of request to prevent replay DeviceCert []byte `json:",omitempty"` // X.509 certificate for client device Signature []byte `json:",omitempty"` // as described by SignatureType // Tailnet is an optional identifier specifying the name of the recommended or required // network that the node should join. Its exact form should not be depended on; new // forms are coming later. The identifier is generally a domain name (for an organization) // or e-mail address (for a personal account on a shared e-mail provider). It is the same name // used by the API, as described in /api.md#tailnet. // If Tailnet begins with the prefix "required:" then the server should prevent logging in to a different // network than the one specified. Otherwise, the server should recommend the specified network // but still permit logging in to other networks. // If empty, no recommendation is offered to the server and the login page should show all options. Tailnet string `json:",omitempty"` } // RegisterResponse is returned by the server in response to a RegisterRequest. 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 // If set, this is the current node-key signature that needs to be // re-signed for the node's new node-key. NodeKeySignature tkatype.MarshaledSignature // Error indicates that authorization failed. If this is non-empty, // other status fields should be ignored. Error string } // EndpointType distinguishes different sources of MapRequest.Endpoint values. type EndpointType int const ( EndpointUnknownType = EndpointType(0) EndpointLocal = EndpointType(1) EndpointSTUN = EndpointType(2) EndpointPortmapped = EndpointType(3) EndpointSTUN4LocalPort = EndpointType(4) // hard NAT: STUN'ed IPv4 address + local fixed port ) func (et EndpointType) String() string { switch et { case EndpointUnknownType: return "?" case EndpointLocal: return "local" case EndpointSTUN: return "stun" case EndpointPortmapped: return "portmap" case EndpointSTUN4LocalPort: return "stun4localport" } return "other" } // Endpoint is an endpoint IPPort and an associated type. // It doesn't currently go over the wire as is but is instead // broken up into two parallel slices in MapRequest, for compatibility // reasons. But this type is used in the codebase. type Endpoint struct { Addr netip.AddrPort Type EndpointType } // MapRequest is sent by a client to either update the control plane // about its current state, or to start a long-poll of 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//map type MapRequest struct { // Version is incremented whenever the client code changes enough that // we want to signal to the control server that we're capable of something // different. // // For current values and history, see the CapabilityVersion type's docs. Version CapabilityVersion Compress string // "zstd" or "" (no compression) KeepAlive bool // whether server should send keep-alives back to us NodeKey key.NodePublic DiscoKey key.DiscoPublic // Stream is whether the client wants to receive multiple MapResponses over // the same HTTP connection. // // If false, the server will send a single MapResponse and then close the // connection. // // If true and Version >= 68, the server should treat this as a read-only // request and ignore any Hostinfo or other fields that might be set. Stream bool // Hostinfo is the client's current Hostinfo. Although it is always included // in the request, the server may choose to ignore it when Stream is true // and Version >= 68. Hostinfo *Hostinfo // MapSessionHandle, if non-empty, is a request to reattach to a previous // map session after a previous map session was interrupted for whatever // reason. Its value is an opaque string as returned by // MapResponse.MapSessionHandle. // // When set, the client must also send MapSessionSeq to specify the last // processed message in that prior session. // // The server may choose to ignore the request for any reason and start a // new map session. This is only applicable when Stream is true. MapSessionHandle string `json:",omitempty"` // MapSessionSeq is the sequence number in the map session identified by // MapSesssionHandle that was most recently processed by the client. // It is only applicable when MapSessionHandle is specified. // If the server chooses to honor the MapSessionHandle request, only sequence // numbers greater than this value will be returned. MapSessionSeq int64 `json:",omitempty"` // Endpoints are the client's magicsock UDP ip:port endpoints (IPv4 or IPv6). // These can be ignored if Stream is true and Version >= 68. Endpoints []netip.AddrPort `json:",omitempty"` // EndpointTypes are the types of the corresponding endpoints in Endpoints. EndpointTypes []EndpointType `json:",omitempty"` // TKAHead describes the hash of the latest AUM applied to the local // tailnet key authority, if one is operating. // It is encoded as tka.AUMHash.MarshalText. TKAHead string `json:",omitempty"` // ReadOnly was set when client just wanted to fetch the MapResponse, // without updating their Endpoints. The intended use was for clients to // discover the DERP map at start-up before their first real endpoint // update. // // Deprecated: always false as of Version 68. ReadOnly bool `json:",omitempty"` // OmitPeers is whether the client is okay with the Peers list being omitted // in the response. // // The behavior of OmitPeers being true varies based on Stream and ReadOnly: // // If OmitPeers is true, Stream is false, and ReadOnly is false, // then the server will let clients update their endpoints without // breaking existing long-polling (Stream == true) connections. // In this case, the server can omit the entire response; the client // only checks the HTTP response status code. // // If OmitPeers is true, Stream is false, but ReadOnly is true, // then all the response fields are included. (This is what the client does // when initially fetching the DERP map.) OmitPeers bool `json:",omitempty"` // DebugFlags is a list of strings specifying debugging and // development features to enable in handling this map // request. The values are deliberately unspecified, as they get // added and removed all the time during development, and offer no // compatibility promise. To roll out semantic changes, bump // Version instead. // // Current DebugFlags values are: // * "warn-ip-forwarding-off": client is trying to be a subnet // router but their IP forwarding is broken. // * "warn-router-unhealthy": client's Router implementation is // having problems. DebugFlags []string `json:",omitempty"` } // PortRange represents a range of UDP or TCP port numbers. type PortRange struct { First uint16 Last uint16 } // Contains reports whether port is in pr. func (pr PortRange) Contains(port uint16) bool { return port >= pr.First && port <= pr.Last } var PortRangeAny = PortRange{0, 65535} // NetPortRange represents a range of ports that's allowed for one or more IPs. type NetPortRange struct { _ structs.Incomparable IP string // IP, CIDR, Range, or "*" (same formats as FilterRule.SrcIPs) Bits *int // deprecated; the old way to turn IP into a CIDR Ports PortRange } // CapGrant grants capabilities in a FilterRule. type CapGrant struct { // Dsts are the destination IP ranges that this capability // grant matches. Dsts []netip.Prefix // Caps are the capabilities the source IP matched by // FilterRule.SrcIPs are granted to the destination IP, // matched by Dsts. // Deprecated: use CapMap instead. Caps []PeerCapability `json:",omitempty"` // CapMap is a map of capabilities to their values. // The key is the capability name, and the value is a list of // values for that capability. CapMap PeerCapMap `json:",omitempty"` } // PeerCapability represents a capability granted to a peer by a FilterRule when // the peer communicates with the node that has this rule. Its meaning is // application-defined. // // It must be a URL like "https://tailscale.com/cap/file-send". type PeerCapability string const ( // PeerCapabilityFileSharingTarget grants the current node the ability to send // files to the peer which has this capability. PeerCapabilityFileSharingTarget PeerCapability = "https://tailscale.com/cap/file-sharing-target" // PeerCapabilityFileSharingSend grants the ability to receive files from a // node that's owned by a different user. PeerCapabilityFileSharingSend PeerCapability = "https://tailscale.com/cap/file-send" // PeerCapabilityDebugPeer grants the ability for a peer to read this node's // goroutines, metrics, magicsock internal state, etc. PeerCapabilityDebugPeer PeerCapability = "https://tailscale.com/cap/debug-peer" // PeerCapabilityWakeOnLAN grants the ability to send a Wake-On-LAN packet. PeerCapabilityWakeOnLAN PeerCapability = "https://tailscale.com/cap/wake-on-lan" // PeerCapabilityIngress grants the ability for a peer to send ingress traffic. PeerCapabilityIngress PeerCapability = "https://tailscale.com/cap/ingress" // PeerCapabilityWebUI grants the ability for a peer to edit features from the // device Web UI. PeerCapabilityWebUI PeerCapability = "tailscale.com/cap/webui" // PeerCapabilityTaildrive grants the ability for a peer to access Taildrive shares. PeerCapabilityTaildrive PeerCapability = "tailscale.com/cap/drive" ) // NodeCapMap is a map of capabilities to their optional values. It is valid for // a capability to have no values (nil slice); such capabilities can be tested // for by using the Contains method. // // See [NodeCapability] for more information on keys. type NodeCapMap map[NodeCapability][]RawMessage // Equal reports whether c and c2 are equal. func (c NodeCapMap) Equal(c2 NodeCapMap) bool { return maps.EqualFunc(c, c2, slices.Equal) } // UnmarshalNodeCapJSON unmarshals each JSON value in cm[cap] as T. // If cap does not exist in cm, it returns (nil, nil). // It returns an error if the values cannot be unmarshaled into the provided type. func UnmarshalNodeCapJSON[T any](cm NodeCapMap, cap NodeCapability) ([]T, error) { vals, ok := cm[cap] if !ok { return nil, nil } out := make([]T, 0, len(vals)) for _, v := range vals { var t T if err := json.Unmarshal([]byte(v), &t); err != nil { return nil, err } out = append(out, t) } return out, nil } // Contains reports whether c has the capability cap. This is used to test for // the existence of a capability, especially when the capability has no // associated argument/data values. func (c NodeCapMap) Contains(cap NodeCapability) bool { _, ok := c[cap] return ok } // PeerCapMap is a map of capabilities to their optional values. It is valid for // a capability to have no values (nil slice); such capabilities can be tested // for by using the HasCapability method. // // The values are opaque to Tailscale, but are passed through from the ACLs to // the application via the WhoIs API. type PeerCapMap map[PeerCapability][]RawMessage // UnmarshalCapJSON unmarshals each JSON value in cm[cap] as T. // If cap does not exist in cm, it returns (nil, nil). // It returns an error if the values cannot be unmarshaled into the provided type. func UnmarshalCapJSON[T any](cm PeerCapMap, cap PeerCapability) ([]T, error) { vals, ok := cm[cap] if !ok { return nil, nil } out := make([]T, 0, len(vals)) for _, v := range vals { var t T if err := json.Unmarshal([]byte(v), &t); err != nil { return nil, err } out = append(out, t) } return out, nil } // HasCapability reports whether c has the capability cap. This is used to test // for the existence of a capability, especially when the capability has no // associated argument/data values. func (c PeerCapMap) HasCapability(cap PeerCapability) bool { _, ok := c[cap] return ok } // FilterRule represents one rule in a packet filter. // // A rule is logically a set of source CIDRs to match (described by // SrcIPs and SrcBits), and a set of destination targets that are then // allowed if a source IP is matches of those CIDRs. type FilterRule struct { // SrcIPs are the source IPs/networks to match. // // It may take the following forms: // * an IP address (IPv4 or IPv6) // * the string "*" to match everything (both IPv4 & IPv6) // * a CIDR (e.g. "192.168.0.0/16") // * a range of two IPs, inclusive, separated by hyphen ("2eff::1-2eff::0800") SrcIPs []string // SrcBits is deprecated; it's the old way to specify a CIDR // prior to CapabilityVersion 7. Its values correspond to the // SrcIPs above. // // If an entry of SrcBits is present for the same index as a // SrcIPs entry, it changes the SrcIP above to be a network // with /n CIDR bits. If the slice is nil or insufficiently // long, the default value (for an IPv4 address) for a // position is 32, as if the SrcIPs above were a /32 mask. For // a "*" SrcIPs value, the corresponding SrcBits value is // ignored. SrcBits []int `json:",omitempty"` // DstPorts are the port ranges to allow once a source IP // matches (is in the CIDR described by SrcIPs & SrcBits). // // CapGrant and DstPorts are mutually exclusive: at most one can be non-nil. DstPorts []NetPortRange `json:",omitempty"` // IPProto are the IP protocol numbers to match. // // As a special case, nil or empty means TCP, UDP, and ICMP. // // Numbers outside the uint8 range (below 0 or above 255) are // reserved for Tailscale's use. Unknown ones are ignored. // // Depending on the IPProto values, DstPorts may or may not be // used. IPProto []int `json:",omitempty"` // CapGrant, if non-empty, are the capabilities to // conditionally grant to the source IP in SrcIPs. // // Think of DstPorts as "capabilities for networking" and // CapGrant as arbitrary application-defined capabilities // defined between the admin's ACLs and the application // doing WhoIs lookups, looking up the remote IP address's // application-level capabilities. // // CapGrant and DstPorts are mutually exclusive: at most one can be non-nil. CapGrant []CapGrant `json:",omitempty"` } var FilterAllowAll = []FilterRule{ { SrcIPs: []string{"*"}, SrcBits: nil, DstPorts: []NetPortRange{{ IP: "*", Bits: nil, Ports: PortRange{0, 65535}, }}, }, } // DNSConfig is the DNS configuration. type DNSConfig struct { // Resolvers are the DNS resolvers to use, in order of preference. Resolvers []*dnstype.Resolver `json:",omitempty"` // Routes maps DNS name suffixes to a set of DNS resolvers to // use. It is used to implement "split DNS" and other advanced DNS // routing overlays. // // Map keys are fully-qualified DNS name suffixes; they may // optionally contain a trailing dot but no leading dot. // // If the value is an empty slice, that means the suffix should still // be handled by Tailscale's built-in resolver (100.100.100.100), such // as for the purpose of handling ExtraRecords. Routes map[string][]*dnstype.Resolver `json:",omitempty"` // FallbackResolvers is like Resolvers, but is only used if a // split DNS configuration is requested in a configuration that // doesn't work yet without explicit default resolvers. // https://github.com/tailscale/tailscale/issues/1743 FallbackResolvers []*dnstype.Resolver `json:",omitempty"` // Domains are the search domains to use. // Search domains must be FQDNs, but *without* the trailing dot. Domains []string `json:",omitempty"` // Proxied turns on automatic resolution of hostnames for devices // in the network map, aka MagicDNS. // Despite the (legacy) name, does not necessarily cause request // proxying to be enabled. Proxied bool `json:",omitempty"` // The following fields are only set and used by // MapRequest.Version >=9 and <14. // Nameservers are the IP addresses of the nameservers to use. Nameservers []netip.Addr `json:",omitempty"` // CertDomains are the set of DNS names for which the control // plane server will assist with provisioning TLS // certificates. See SetDNSRequest, which can be used to // answer dns-01 ACME challenges for e.g. LetsEncrypt. // These names are FQDNs without trailing periods, and without // any "_acme-challenge." prefix. CertDomains []string `json:",omitempty"` // ExtraRecords contains extra DNS records to add to the // MagicDNS config. ExtraRecords []DNSRecord `json:",omitempty"` // ExitNodeFilteredSuffixes are the DNS suffixes that the // node, when being an exit node DNS proxy, should not answer. // // The entries do not contain trailing periods and are always // all lowercase. // // If an entry starts with a period, it's a suffix match (but // suffix ".a.b" doesn't match "a.b"; a prefix is required). // // If an entry does not start with a period, it's an exact // match. // // Matches are case insensitive. ExitNodeFilteredSet []string `json:",omitempty"` // TempCorpIssue13969 is a temporary (2023-08-16) field for an internal hack day prototype. // It contains a user inputed URL that should have a list of domains to be blocked. // See https://github.com/tailscale/corp/issues/13969. TempCorpIssue13969 string `json:",omitempty"` } // DNSRecord is an extra DNS record to add to MagicDNS. type DNSRecord struct { // Name is the fully qualified domain name of // the record to add. The trailing dot is optional. Name string // Type is the DNS record type. // Empty means A or AAAA, depending on value. // Other values are currently ignored. Type string `json:",omitempty"` // Value is the IP address in string form. // TODO(bradfitz): if we ever add support for record types // with non-UTF8 binary data, add ValueBytes []byte that // would take precedence. Value string } // PingType is a string representing the kind of ping to perform. type PingType string const ( // PingDisco performs a ping, without involving IP at either end. PingDisco PingType = "disco" // PingTSMP performs a ping, using the IP layer, but avoiding the OS IP stack. PingTSMP PingType = "TSMP" // PingICMP performs a ping between two tailscale nodes using ICMP that is // received by the target systems IP stack. PingICMP PingType = "ICMP" // PingPeerAPI performs a ping between two tailscale nodes using ICMP that is // received by the target systems IP stack. PingPeerAPI PingType = "peerapi" ) // PingRequest with no IP and Types is a request to send an HTTP request to prove the // long-polling client is still connected. // PingRequest with Types and IP, will send a ping to the IP and send a POST // request containing a PingResponse to the URL containing results. type PingRequest struct { // URL is the URL to reply to the PingRequest to. // It will be a unique URL each time. No auth headers are necessary. // If the client sees multiple PingRequests with the same URL, // subsequent ones should be ignored. // // The HTTP method that the node should make back to URL depends on the other // fields of the PingRequest. If Types is defined, then URL is the URL to // send a POST request to. Otherwise, the node should just make a HEAD // request to URL. URL string // URLIsNoise, if true, means that the client should hit URL over the Noise // transport instead of TLS. URLIsNoise bool `json:",omitempty"` // Log is whether to log about this ping in the success case. // For failure cases, the client will log regardless. Log bool `json:",omitempty"` // Types is the types of ping that are initiated. Can be any PingType, comma // separated, e.g. "disco,TSMP" // // As a special case, if Types is "c2n", then this PingRequest is a // client-to-node HTTP request. The HTTP request should be handled by this // node's c2n handler and the HTTP response sent in a POST to URL. For c2n, // the value of URLIsNoise is ignored and only the Noise transport (back to // the control plane) will be used, as if URLIsNoise were true. Types string `json:",omitempty"` // IP is the ping target, when needed by the PingType(s) given in Types. IP netip.Addr // Payload is the ping payload. // // It is only used for c2n requests, in which case it's an HTTP/1.0 or // HTTP/1.1-formatted HTTP request as parsable with http.ReadRequest. Payload []byte `json:",omitempty"` } // PingResponse provides result information for a TSMP or Disco PingRequest. // Typically populated from an ipnstate.PingResult used in `tailscale ping`. type PingResponse struct { Type PingType // ping type, such as TSMP or disco. IP string `json:",omitempty"` // ping destination NodeIP string `json:",omitempty"` // Tailscale IP of node handling IP (different for subnet routers) NodeName string `json:",omitempty"` // DNS name base or (possibly not unique) hostname // Err contains a short description of error conditions if the PingRequest // could not be fulfilled for some reason. // e.g. "100.1.2.3 is local Tailscale IP" Err string `json:",omitempty"` // LatencySeconds reports measurement of the round-trip time of a message to // the requested target, if it could be determined. If LatencySeconds is // omitted, Err should contain information as to the cause. LatencySeconds float64 `json:",omitempty"` // Endpoint is the ip:port if direct UDP was used. // It is not currently set for TSMP pings. Endpoint string `json:",omitempty"` // DERPRegionID is non-zero DERP region ID if DERP was used. // It is not currently set for TSMP pings. DERPRegionID int `json:",omitempty"` // DERPRegionCode is the three-letter region code // corresponding to DERPRegionID. // It is not currently set for TSMP pings. DERPRegionCode string `json:",omitempty"` // PeerAPIPort is set by TSMP ping responses for peers that // are running a peerapi server. This is the port they're // running the server on. PeerAPIPort uint16 `json:",omitempty"` // IsLocalIP is whether the ping request error is due to it being // a ping to the local node. IsLocalIP bool `json:",omitempty"` } // MapResponse is the response to a MapRequest. It describes the state of the // local node, the peer nodes, the DNS configuration, the packet filter, and // more. A MapRequest, depending on its parameters, may result in the control // plane coordination server sending 0, 1 or a stream of multiple MapResponse // values. // // When the client sets MapRequest.Stream, the server sends a stream of // MapResponses. That long-lived HTTP transaction is called a "map poll". In a // map poll, the first MapResponse will be complete and subsequent MapResponses // will be incremental updates with only changed information. // // The zero value for all fields means "unchanged". Unfortunately, several // fields were defined before that convention was established, so they use a // slice with omitempty, meaning this type can't be used to marshal JSON // containing non-nil zero-length slices (meaning explicitly now empty). The // control plane uses a separate type to marshal these fields. This type is // primarily used for unmarshaling responses so the omitempty annotations are // mostly useless, except that this type is also used for the integration test's // fake control server. (It's not necessary to marshal a non-nil zero-length // slice for the things we've needed to test in the integration tests as of // 2023-09-09). type MapResponse struct { // MapSessionHandle optionally specifies a unique opaque handle for this // stateful MapResponse session. Servers may choose not to send it, and it's // only sent on the first MapResponse in a stream. The client can determine // whether it's reattaching to a prior stream by seeing whether this value // matches the requested MapRequest.MapSessionHandle. MapSessionHandle string `json:",omitempty"` // Seq is a sequence number within a named map session (a response where the // first message contains a MapSessionHandle). The Seq number may be omitted // on responses that don't change the state of the stream, such as KeepAlive // or certain types of PingRequests. This is the value to be sent in // MapRequest.MapSessionSeq to resume after this message. Seq int64 `json:",omitempty"` // KeepAlive, if set, represents an empty message just to keep // the connection alive. When true, all other fields except // PingRequest, ControlTime, and PopBrowserURL are ignored. KeepAlive bool `json:",omitempty"` // PingRequest, if non-empty, is a request to the client to // prove it's still there by sending an HTTP request to the // provided URL. No auth headers are necessary. // PingRequest may be sent on any MapResponse (ones with // KeepAlive true or false). PingRequest *PingRequest `json:",omitempty"` // PopBrowserURL, if non-empty, is a URL for the client to // open to complete an action. The client should dup suppress // identical URLs and only open it once for the same URL. PopBrowserURL string `json:",omitempty"` // Networking // Node describes the node making the map request. // Starting with MapRequest.Version 18, nil means unchanged. Node *Node `json:",omitempty"` // DERPMap describe the set of DERP servers available. // A nil value means unchanged. DERPMap *DERPMap `json:",omitempty"` // Peers, if non-empty, is the complete list of peers. // It will be set in the first MapResponse for a long-polled request/response. // Subsequent responses will be delta-encoded if MapRequest.Version >= 5 and server // chooses, in which case Peers will be nil or zero length. // If Peers is non-empty, PeersChanged and PeersRemoved should // be ignored (and should be empty). // Peers is always returned sorted by Node.ID. Peers []*Node `json:",omitempty"` // PeersChanged are the Nodes (identified by their ID) that // have changed or been added since the past update on the // HTTP response. It's not used by the server if MapRequest.Version < 5. // PeersChanged is always returned sorted by Node.ID. PeersChanged []*Node `json:",omitempty"` // PeersRemoved are the NodeIDs that are no longer in the peer list. PeersRemoved []NodeID `json:",omitempty"` // PeersChangedPatch, if non-nil, means that node(s) have changed. // This is a lighter version of the older PeersChanged support that // only supports certain types of updates // // These are applied after Peers* above, but in practice the // control server should only send these on their own, without // the Peers* fields also set. PeersChangedPatch []*PeerChange `json:",omitempty"` // PeerSeenChange contains information on how to update peers' LastSeen // times. If the value is false, the peer is gone. If the value is true, // the LastSeen time is now. Absent means unchanged. PeerSeenChange map[NodeID]bool `json:",omitempty"` // OnlineChange changes the value of a Peer Node.Online value. OnlineChange map[NodeID]bool `json:",omitempty"` // DNSConfig contains the DNS settings for the client to use. // A nil value means no change from an earlier non-nil value. DNSConfig *DNSConfig `json:",omitempty"` // Domain is the name of the network that this node is // in. It's either of the form "example.com" (for user // foo@example.com, for multi-user networks) or // "foo@gmail.com" (for siloed users on shared email // providers). Its exact form should not be depended on; new // forms are coming later. // If empty, the value is unchanged. Domain string `json:",omitempty"` // CollectServices reports whether this node's Tailnet has // requested that info about services be included in HostInfo. // If unset, the most recent non-empty MapResponse value in // the HTTP response stream is used. CollectServices opt.Bool `json:",omitempty"` // PacketFilter are the firewall rules. // // For MapRequest.Version >= 6, a nil value means the most // previously streamed non-nil MapResponse.PacketFilter within // the same HTTP response. A non-nil but empty list always means // no PacketFilter (that is, to block everything). // // Note that this package's type, due its use of a slice and omitempty, is // unable to marshal a zero-length non-nil slice. The control server needs // to marshal this type using a separate type. See MapResponse docs. // // See PacketFilters for the newer way to send PacketFilter updates. PacketFilter []FilterRule `json:",omitempty"` // PacketFilters encodes incremental packet filter updates to the client // without having to send the entire packet filter on any changes as // required by the older PacketFilter (singular) field above. The map keys // are server-assigned arbitrary strings. The map values are the new rules // for that key, or nil to delete it. The client then concatenates all the // rules together to generate the final packet filter. Because the // FilterRules can only match or not match, the ordering of filter rules // doesn't matter. (That said, the client generates the file merged packet // filter rules by concananting all the packet filter rules sorted by the // map key name. But it does so for stability and testability, not // correctness. If something needs to rely on that property, something has // gone wrong.) // // If the server sends a non-nil PacketFilter (above), that is equivalent to // a named packet filter with the key "base". It is valid for the server to // send both PacketFilter and PacketFilters in the same MapResponse or // alternate between them within a session. The PacketFilter is applied // first (if set) and then the PacketFilters. // // As a special case, the map key "*" with a value of nil means to clear all // prior named packet filters (including any implicit "base") before // processing the other map entries. PacketFilters map[string][]FilterRule `json:",omitempty"` // UserProfiles are the user profiles of nodes in the network. // As as of 1.1.541 (mapver 5), this contains new or updated // user profiles only. UserProfiles []UserProfile `json:",omitempty"` // Health, if non-nil, sets the health state of the node from the control // plane's perspective. A nil value means no change from the previous // MapResponse. A non-nil 0-length slice restores the health to good (no // known problems). A non-zero length slice are the list of problems that // the control place sees. // // Note that this package's type, due its use of a slice and omitempty, is // unable to marshal a zero-length non-nil slice. The control server needs // to marshal this type using a separate type. See MapResponse docs. Health []string `json:",omitempty"` // SSHPolicy, if non-nil, updates the SSH policy for how incoming // SSH connections should be handled. SSHPolicy *SSHPolicy `json:",omitempty"` // ControlTime, if non-zero, is the current timestamp according to the control server. ControlTime *time.Time `json:",omitempty"` // TKAInfo describes the control plane's view of tailnet // key authority (TKA) state. // // An initial nil TKAInfo indicates that the control plane // believes TKA should not be enabled. An initial non-nil TKAInfo // indicates the control plane believes TKA should be enabled. // A nil TKAInfo in a mapresponse stream (i.e. a 'delta' mapresponse) // indicates no change from the value sent earlier. TKAInfo *TKAInfo `json:",omitempty"` // DomainDataPlaneAuditLogID, if non-empty, is the per-tailnet log ID to be // used when writing data plane audit logs. DomainDataPlaneAuditLogID string `json:",omitempty"` // Debug is normally nil, except for when the control server // is setting debug settings on a node. Debug *Debug `json:",omitempty"` // ControlDialPlan tells the client how to connect to the control // server. An initial nil is equivalent to new(ControlDialPlan). // A subsequent streamed nil means no change. ControlDialPlan *ControlDialPlan `json:",omitempty"` // ClientVersion describes the latest client version that's available for // download and whether the client is using it. A nil value means no change // or nothing to report. ClientVersion *ClientVersion `json:",omitempty"` // DefaultAutoUpdate is the default node auto-update setting for this // tailnet. The node is free to opt-in or out locally regardless of this // value. This value is only used on first MapResponse from control, the // auto-update setting doesn't change if the tailnet admin flips the // default after the node registered. DefaultAutoUpdate opt.Bool `json:",omitempty"` // MaxKeyDuration describes the MaxKeyDuration setting for the tailnet. // If zero, the value is unchanged. MaxKeyDuration time.Duration `json:",omitempty"` } // ClientVersion is information about the latest client version that's available // for the client (and whether they're already running it). // // It does not include a URL to download the client, as that varies by platform. type ClientVersion struct { // RunningLatest is true if the client is running the latest build. RunningLatest bool `json:",omitempty"` // LatestVersion is the latest version.Short ("1.34.2") version available // for download for the client's platform and packaging type. // It won't be populated if RunningLatest is true. LatestVersion string `json:",omitempty"` // UrgentSecurityUpdate is set when the client is missing an important // security update. That update may be in LatestVersion or earlier. // UrgentSecurityUpdate should not be set if RunningLatest is false. UrgentSecurityUpdate bool `json:",omitempty"` // Notify is whether the client should do an OS-specific notification about // a new version being available. This should not be populated if // RunningLatest is true. The client should not notify multiple times for // the same LatestVersion value. Notify bool `json:",omitempty"` // NotifyURL is a URL to open in the browser when the user clicks on the // notification, when Notify is true. NotifyURL string `json:",omitempty"` // NotifyText is the text to show in the notification, when Notify is true. NotifyText string `json:",omitempty"` } // ControlDialPlan is instructions from the control server to the client on how // to connect to the control server; this is useful for maintaining connection // if the client's network state changes after the initial connection, or due // to the configuration that the control server pushes. type ControlDialPlan struct { // An empty list means the default: use DNS (unspecified which DNS). Candidates []ControlIPCandidate } // ControlIPCandidate represents a single candidate address to use when // connecting to the control server. type ControlIPCandidate struct { // IP is the address to attempt connecting to. IP netip.Addr // DialStartSec is the number of seconds after the beginning of the // connection process to wait before trying this candidate. DialStartDelaySec float64 `json:",omitempty"` // DialTimeoutSec is the timeout for a connection to this candidate, // starting after DialStartDelaySec. DialTimeoutSec float64 `json:",omitempty"` // Priority is the relative priority of this candidate; candidates with // a higher priority are preferred over candidates with a lower // priority. Priority int `json:",omitempty"` } // Debug used to be a miscellaneous set of declarative debug config changes and // imperative debug commands. They've since been mostly migrated to node // attributes (MapResponse.Node.Capabilities) for the declarative things and c2n // requests for the imperative things. Not much remains here. Don't add more. type Debug struct { // SleepSeconds requests that the client sleep for the // provided number of seconds. // The client can (and should) limit the value (such as 5 // minutes). This exists as a safety measure to slow down // spinning clients, in case we introduce a bug in the // state machine. SleepSeconds float64 `json:",omitempty"` // DisableLogTail disables the logtail package. Once disabled it can't be // re-enabled for the lifetime of the process. // // This is primarily used by Headscale. DisableLogTail bool `json:",omitempty"` // Exit optionally specifies that the client should os.Exit // with this code. This is a safety measure in case a client is crash // looping or in an unsafe state and we need to remotely shut it down. Exit *int `json:",omitempty"` } func (id ID) String() string { return fmt.Sprintf("id:%x", int64(id)) } func (id UserID) String() string { return fmt.Sprintf("userid:%x", int64(id)) } func (id LoginID) String() string { return fmt.Sprintf("loginid:%x", int64(id)) } func (id NodeID) String() string { return fmt.Sprintf("nodeid:%x", int64(id)) } // Equal reports whether n and n2 are equal. func (n *Node) Equal(n2 *Node) bool { if n == nil && n2 == nil { return true } return n != nil && n2 != nil && n.ID == n2.ID && n.StableID == n2.StableID && n.Name == n2.Name && n.User == n2.User && n.Sharer == n2.Sharer && n.UnsignedPeerAPIOnly == n2.UnsignedPeerAPIOnly && n.Key == n2.Key && n.KeyExpiry.Equal(n2.KeyExpiry) && bytes.Equal(n.KeySignature, n2.KeySignature) && n.Machine == n2.Machine && n.DiscoKey == n2.DiscoKey && eqPtr(n.Online, n2.Online) && slicesx.EqualSameNil(n.Addresses, n2.Addresses) && slicesx.EqualSameNil(n.AllowedIPs, n2.AllowedIPs) && slicesx.EqualSameNil(n.PrimaryRoutes, n2.PrimaryRoutes) && slicesx.EqualSameNil(n.Endpoints, n2.Endpoints) && n.DERP == n2.DERP && n.Cap == n2.Cap && n.Hostinfo.Equal(n2.Hostinfo) && n.Created.Equal(n2.Created) && eqTimePtr(n.LastSeen, n2.LastSeen) && n.MachineAuthorized == n2.MachineAuthorized && slices.Equal(n.Capabilities, n2.Capabilities) && n.CapMap.Equal(n2.CapMap) && n.ComputedName == n2.ComputedName && n.computedHostIfDifferent == n2.computedHostIfDifferent && n.ComputedNameWithHost == n2.ComputedNameWithHost && slicesx.EqualSameNil(n.Tags, n2.Tags) && n.Expired == n2.Expired && eqPtr(n.SelfNodeV4MasqAddrForThisPeer, n2.SelfNodeV4MasqAddrForThisPeer) && eqPtr(n.SelfNodeV6MasqAddrForThisPeer, n2.SelfNodeV6MasqAddrForThisPeer) && n.IsWireGuardOnly == n2.IsWireGuardOnly } func eqPtr[T comparable](a, b *T) bool { if a == b { // covers nil return true } if a == nil || b == nil { return false } return *a == *b } func eqTimePtr(a, b *time.Time) bool { return ((a == nil) == (b == nil)) && (a == nil || a.Equal(*b)) } // Oauth2Token is a copy of golang.org/x/oauth2.Token, to avoid the // go.mod dependency on App Engine and grpc, which was causing problems. // All we actually needed was this struct on the client side. type Oauth2Token struct { // AccessToken is the token that authorizes and authenticates // the requests. AccessToken string `json:"access_token"` // TokenType is the type of token. // The Type method returns either this or "Bearer", the default. TokenType string `json:"token_type,omitempty"` // RefreshToken is a token that's used by the application // (as opposed to the user) to refresh the access token // if it expires. RefreshToken string `json:"refresh_token,omitempty"` // Expiry is the optional expiration time of the access token. // // If zero, TokenSource implementations will reuse the same // token forever and RefreshToken or equivalent // mechanisms for that TokenSource will not be used. Expiry time.Time `json:"expiry,omitempty"` } // NodeCapability represents a capability granted to the self node as listed in // MapResponse.Node.Capabilities. // // It must be a URL like "https://tailscale.com/cap/file-sharing", or a // well-known capability name like "funnel". The latter is only allowed for // Tailscale-defined capabilities. // // Unlike PeerCapability, NodeCapability is not in context of a peer and is // granted to the node itself. // // These are also referred to as "Node Attributes" in the ACL policy file. type NodeCapability string const ( CapabilityFileSharing NodeCapability = "https://tailscale.com/cap/file-sharing" CapabilityAdmin NodeCapability = "https://tailscale.com/cap/is-admin" CapabilitySSH NodeCapability = "https://tailscale.com/cap/ssh" // feature enabled/available CapabilitySSHRuleIn NodeCapability = "https://tailscale.com/cap/ssh-rule-in" // some SSH rule reach this node CapabilityDataPlaneAuditLogs NodeCapability = "https://tailscale.com/cap/data-plane-audit-logs" // feature enabled CapabilityDebug NodeCapability = "https://tailscale.com/cap/debug" // exposes debug endpoints over the PeerAPI CapabilityHTTPS NodeCapability = "https" // CapabilityBindToInterfaceByRoute changes how Darwin nodes create // sockets (in the net/netns package). See that package for more // details on the behaviour of this capability. CapabilityBindToInterfaceByRoute NodeCapability = "https://tailscale.com/cap/bind-to-interface-by-route" // CapabilityDebugDisableAlternateDefaultRouteInterface changes how Darwin // nodes get the default interface. There is an optional hook (used by the // macOS and iOS clients) to override the default interface, this capability // disables that and uses the default behavior (of parsing the routing // table). CapabilityDebugDisableAlternateDefaultRouteInterface NodeCapability = "https://tailscale.com/cap/debug-disable-alternate-default-route-interface" // CapabilityDebugDisableBindConnToInterface disables the automatic binding // of connections to the default network interface on Darwin nodes. CapabilityDebugDisableBindConnToInterface NodeCapability = "https://tailscale.com/cap/debug-disable-bind-conn-to-interface" // CapabilityTailnetLock indicates the node may initialize tailnet lock. CapabilityTailnetLock NodeCapability = "https://tailscale.com/cap/tailnet-lock" // Funnel warning capabilities used for reporting errors to the user. // CapabilityWarnFunnelNoInvite indicates whether Funnel is enabled for the tailnet. // This cap is no longer used 2023-08-09 onwards. CapabilityWarnFunnelNoInvite NodeCapability = "https://tailscale.com/cap/warn-funnel-no-invite" // CapabilityWarnFunnelNoHTTPS indicates HTTPS has not been enabled for the tailnet. // This cap is no longer used 2023-08-09 onwards. CapabilityWarnFunnelNoHTTPS NodeCapability = "https://tailscale.com/cap/warn-funnel-no-https" // Debug logging capabilities // CapabilityDebugTSDNSResolution enables verbose debug logging for DNS // resolution for Tailscale-controlled domains (the control server, log // server, DERP servers, etc.) CapabilityDebugTSDNSResolution NodeCapability = "https://tailscale.com/cap/debug-ts-dns-resolution" // CapabilityFunnelPorts specifies the ports that the Funnel is available on. // The ports are specified as a comma-separated list of port numbers or port // ranges (e.g. "80,443,8080-8090") in the ports query parameter. // e.g. https://tailscale.com/cap/funnel-ports?ports=80,443,8080-8090 CapabilityFunnelPorts NodeCapability = "https://tailscale.com/cap/funnel-ports" // NodeAttrOnlyTCP443 specifies that the client should not attempt to generate // any outbound traffic that isn't TCP on port 443 (HTTPS). This is used for // clients in restricted environments where only HTTPS traffic is allowed // other types of traffic trips outbound firewall alarms. This thus implies // all traffic is over DERP. NodeAttrOnlyTCP443 NodeCapability = "only-tcp-443" // NodeAttrFunnel grants the ability for a node to host ingress traffic. NodeAttrFunnel NodeCapability = "funnel" // NodeAttrSSHAggregator grants the ability for a node to collect SSH sessions. NodeAttrSSHAggregator NodeCapability = "ssh-aggregator" // NodeAttrDebugForceBackgroundSTUN forces a node to always do background // STUN queries regardless of inactivity. NodeAttrDebugForceBackgroundSTUN NodeCapability = "debug-always-stun" // NodeAttrDebugDisableWGTrim disables the lazy WireGuard configuration, // always giving WireGuard the full netmap, even for idle peers. NodeAttrDebugDisableWGTrim NodeCapability = "debug-no-wg-trim" // NodeAttrDebugDisableDRPO disables the DERP Return Path Optimization. // See Issue 150. NodeAttrDebugDisableDRPO NodeCapability = "debug-disable-drpo" // NodeAttrDisableSubnetsIfPAC controls whether subnet routers should be // disabled if WPAD is present on the network. NodeAttrDisableSubnetsIfPAC NodeCapability = "debug-disable-subnets-if-pac" // NodeAttrDisableUPnP makes the client not perform a UPnP portmapping. // By default, we want to enable it to see if it works on more clients. // // If UPnP catastrophically fails for people, this should be set kill // new attempts at UPnP connections. NodeAttrDisableUPnP NodeCapability = "debug-disable-upnp" // NodeAttrDisableDeltaUpdates makes the client not process updates via the // delta update mechanism and should instead treat all netmap changes as // "full" ones as tailscaled did in 1.48.x and earlier. NodeAttrDisableDeltaUpdates NodeCapability = "disable-delta-updates" // NodeAttrRandomizeClientPort makes magicsock UDP bind to // :0 to get a random local port, ignoring any configured // fixed port. NodeAttrRandomizeClientPort NodeCapability = "randomize-client-port" // NodeAttrSilentDisco makes the client suppress disco heartbeats to its // peers. NodeAttrSilentDisco NodeCapability = "silent-disco" // NodeAttrOneCGNATEnable makes the client prefer one big CGNAT /10 route // rather than a /32 per peer. At most one of this or // NodeAttrOneCGNATDisable may be set; if neither are, it's automatic. NodeAttrOneCGNATEnable NodeCapability = "one-cgnat?v=true" // NodeAttrOneCGNATDisable makes the client prefer a /32 route per peer // rather than one big /10 CGNAT route. At most one of this or // NodeAttrOneCGNATEnable may be set; if neither are, it's automatic. NodeAttrOneCGNATDisable NodeCapability = "one-cgnat?v=false" // NodeAttrPeerMTUEnable makes the client do path MTU discovery to its // peers. If it isn't set, it defaults to the client default. NodeAttrPeerMTUEnable NodeCapability = "peer-mtu-enable" // NodeAttrDNSForwarderDisableTCPRetries disables retrying truncated // DNS queries over TCP if the response is truncated. NodeAttrDNSForwarderDisableTCPRetries NodeCapability = "dns-forwarder-disable-tcp-retries" // NodeAttrLinuxMustUseIPTables forces Linux clients to use iptables for // netfilter management. // This cannot be set simultaneously with NodeAttrLinuxMustUseNfTables. NodeAttrLinuxMustUseIPTables NodeCapability = "linux-netfilter?v=iptables" // NodeAttrLinuxMustUseNfTables forces Linux clients to use nftables for // netfilter management. // This cannot be set simultaneously with NodeAttrLinuxMustUseIPTables. NodeAttrLinuxMustUseNfTables NodeCapability = "linux-netfilter?v=nftables" // NodeAttrSeamlessKeyRenewal makes clients enable beta functionality // of renewing node keys without breaking connections. NodeAttrSeamlessKeyRenewal NodeCapability = "seamless-key-renewal" // NodeAttrProbeUDPLifetime makes the client probe UDP path lifetime at the // tail end of an active direct connection in magicsock. NodeAttrProbeUDPLifetime NodeCapability = "probe-udp-lifetime" // NodeAttrsTaildriveShare enables sharing via Taildrive. NodeAttrsTaildriveShare NodeCapability = "drive:share" // NodeAttrsTaildriveAccess enables accessing shares via Taildrive. NodeAttrsTaildriveAccess NodeCapability = "drive:access" // NodeAttrSuggestExitNode is applied to each exit node which the control plane has determined // is a recommended exit node. NodeAttrSuggestExitNode NodeCapability = "suggest-exit-node" // NodeAttrDisableWebClient disables using the web client. NodeAttrDisableWebClient NodeCapability = "disable-web-client" // NodeAttrExitDstNetworkFlowLog enables exit node destinations in network flow logs. NodeAttrExitDstNetworkFlowLog NodeCapability = "exit-dst-network-flow-log" ) // SetDNSRequest is a request to add a DNS record. // // This is used for ACME DNS-01 challenges (so people can use // LetsEncrypt, etc). // // 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//set-dns type SetDNSRequest struct { // Version is the client's capabilities // (CurrentCapabilityVersion) when using the Noise transport. // // When using the original nacl crypto_box transport, the // value must be 1. Version CapabilityVersion // NodeKey is the client's current node key. NodeKey key.NodePublic // Name is the domain name for which to create a record. // For ACME DNS-01 challenges, it should be one of the domains // in MapResponse.DNSConfig.CertDomains with the prefix // "_acme-challenge.". Name string // Type is the DNS record type. For ACME DNS-01 challenges, it // should be "TXT". Type string // Value is the value to add. Value string } // SetDNSResponse is the response to a SetDNSRequest. type SetDNSResponse struct{} // HealthChangeRequest is the JSON request body type used to report // node health changes to https:///machine//update-health. type HealthChangeRequest struct { Subsys string // a health.Subsystem value in string form Error string // or empty if cleared // NodeKey is the client's current node key. // In clients <= 1.62.0 it was always the zero value. NodeKey key.NodePublic } // SSHPolicy is the policy for how to handle incoming SSH connections // over Tailscale. type SSHPolicy struct { // Rules are the rules to process for an incoming SSH connection. The first // matching rule takes its action and stops processing further rules. // // When an incoming connection first starts, all rules are evaluated in // "none" auth mode, where the client hasn't even been asked to send a // public key. All SSHRule.Principals requiring a public key won't match. If // a rule matches on the first pass and its Action is reject, the // authentication fails with that action's rejection message, if any. // // If the first pass rule evaluation matches nothing without matching an // Action with Reject set, the rules are considered to see whether public // keys might still result in a match. If not, "none" auth is terminated // before proceeding to public key mode. If so, the client is asked to try // public key authentication and the rules are evaluated again for each of // the client's present keys. Rules []*SSHRule `json:"rules"` } // An SSH rule is a match predicate and associated action for an incoming SSH connection. type SSHRule struct { // RuleExpires, if non-nil, is when this rule expires. // // For example, a (principal,sshuser) tuple might be granted // prompt-free SSH access for N minutes, so this rule would be // before a expiration-free rule for the same principal that // required an auth prompt. This permits the control plane to // be out of the path for already-authorized SSH pairs. // // Once a rule matches, the lifetime of any accepting connection // is subject to the SSHAction.SessionExpires time, if any. RuleExpires *time.Time `json:"ruleExpires,omitempty"` // Principals matches an incoming connection. If the connection // matches anything in this list and also matches SSHUsers, // then Action is applied. Principals []*SSHPrincipal `json:"principals"` // SSHUsers are the SSH users that this rule matches. It is a // map from either ssh-user|"*" => local-user. The map must // contain a key for either ssh-user or, as a fallback, "*" to // match anything. If it does, the map entry's value is the // actual user that's logged in. // If the map value is the empty string (for either the // requested SSH user or "*"), the rule doesn't match. // If the map value is "=", it means the ssh-user should map // directly to the local-user. // It may be nil if the Action is reject. SSHUsers map[string]string `json:"sshUsers"` // Action is the outcome to task. // A nil or invalid action means to deny. Action *SSHAction `json:"action"` } // SSHPrincipal is either a particular node or a user on any node. type SSHPrincipal struct { // Matching any one of the following four field causes a match. // It must also match Certs, if non-empty. Node StableNodeID `json:"node,omitempty"` NodeIP string `json:"nodeIP,omitempty"` UserLogin string `json:"userLogin,omitempty"` // email-ish: foo@example.com, bar@github Any bool `json:"any,omitempty"` // if true, match any connection // TODO(bradfitz): add StableUserID, once that exists // PubKeys, if non-empty, means that this SSHPrincipal only // matches if one of these public keys is presented by the user. // // As a special case, if len(PubKeys) == 1 and PubKeys[0] starts // with "https://", then it's fetched (like https://github.com/username.keys). // In that case, the following variable expansions are also supported // in the URL: // * $LOGINNAME_EMAIL ("foo@bar.com" or "foo@github") // * $LOGINNAME_LOCALPART (the "foo" from either of the above) PubKeys []string `json:"pubKeys,omitempty"` } // SSHAction is how to handle an incoming connection. // At most one field should be non-zero. type SSHAction struct { // Message, if non-empty, is shown to the user before the // action occurs. Message string `json:"message,omitempty"` // Reject, if true, terminates the connection. This action // has higher priority that Accept, if given. // The reason this is exists is primarily so a response // from HoldAndDelegate has a way to stop the poll. Reject bool `json:"reject,omitempty"` // Accept, if true, accepts the connection immediately // without further prompts. Accept bool `json:"accept,omitempty"` // SessionDuration, if non-zero, is how long the session can stay open // before being forcefully terminated. SessionDuration time.Duration `json:"sessionDuration,omitempty"` // AllowAgentForwarding, if true, allows accepted connections to forward // the ssh agent if requested. AllowAgentForwarding bool `json:"allowAgentForwarding,omitempty"` // HoldAndDelegate, if non-empty, is a URL that serves an // outcome verdict. The connection will be accepted and will // block until the provided long-polling URL serves a new // SSHAction JSON value. The URL must be fetched using the // Noise transport (in package control/control{base,http}). // If the long poll breaks before returning a complete HTTP // response, it should be re-fetched as long as the SSH // session is open. // // The following variables in the URL are expanded by tailscaled: // // * $SRC_NODE_IP (URL escaped) // * $SRC_NODE_ID (Node.ID as int64 string) // * $DST_NODE_IP (URL escaped) // * $DST_NODE_ID (Node.ID as int64 string) // * $SSH_USER (URL escaped, ssh user requested) // * $LOCAL_USER (URL escaped, local user mapped) HoldAndDelegate string `json:"holdAndDelegate,omitempty"` // AllowLocalPortForwarding, if true, allows accepted connections // to use local port forwarding if requested. AllowLocalPortForwarding bool `json:"allowLocalPortForwarding,omitempty"` // AllowRemotePortForwarding, if true, allows accepted connections // to use remote port forwarding if requested. AllowRemotePortForwarding bool `json:"allowRemotePortForwarding,omitempty"` // Recorders defines the destinations of the SSH session recorders. // The recording will be uploaded to http://addr:port/record. Recorders []netip.AddrPort `json:"recorders,omitempty"` // OnRecorderFailure is the action to take if recording fails. // If nil, the default action is to fail open. OnRecordingFailure *SSHRecorderFailureAction `json:"onRecordingFailure,omitempty"` } // SSHRecorderFailureAction is the action to take if recording fails. type SSHRecorderFailureAction struct { // RejectSessionWithMessage, if not empty, specifies that the session should // be rejected if the recording fails to start. // The message will be shown to the user before the session is rejected. RejectSessionWithMessage string `json:",omitempty"` // TerminateSessionWithMessage, if not empty, specifies that the session // should be terminated if the recording fails after it has started. The // message will be shown to the user before the session is terminated. TerminateSessionWithMessage string `json:",omitempty"` // NotifyURL, if non-empty, specifies a HTTP POST URL to notify when the // recording fails. The payload is the JSON encoded // SSHRecordingFailureNotifyRequest struct. The host field in the URL is // ignored, and it will be sent to control over the Noise transport. NotifyURL string `json:",omitempty"` } // SSHEventNotifyRequest is the JSON payload sent to the NotifyURL // for an SSH event. type SSHEventNotifyRequest struct { // EventType is the type of notify request being sent. EventType SSHEventType // ConnectionID uniquely identifies a connection made to the SSH server. // It may be shared across multiple sessions over the same connection in // case a single connection creates multiple sessions. ConnectionID string // CapVersion is the client's current CapabilityVersion. CapVersion CapabilityVersion // NodeKey is the client's current node key. NodeKey key.NodePublic // SrcNode is the ID of the node that initiated the SSH session. SrcNode NodeID // SSHUser is the user that was presented to the SSH server. SSHUser string // LocalUser is the user that was resolved from the SSHUser for the local machine. LocalUser string // RecordingAttempts is the list of recorders that were attempted, in order. RecordingAttempts []*SSHRecordingAttempt } // SSHEventType defines the event type linked to a SSH action or state. type SSHEventType int const ( UnspecifiedSSHEventType SSHEventType = 0 // SSHSessionRecordingRejected is the event that // defines when a SSH session cannot be started // because no recorder is available for session // recording, and the SSHRecorderFailureAction // RejectSessionWithMessage is not empty. SSHSessionRecordingRejected SSHEventType = 1 // SSHSessionRecordingTerminated is the event that // defines when session recording has failed // during the session and the SSHRecorderFailureAction // TerminateSessionWithMessage is not empty. SSHSessionRecordingTerminated SSHEventType = 2 // SSHSessionRecordingFailed is the event that // defines when session recording is unavailable and // the SSHRecorderFailureAction RejectSessionWithMessage // or TerminateSessionWithMessage is empty. SSHSessionRecordingFailed SSHEventType = 3 ) // SSHRecordingAttempt is a single attempt to start a recording. type SSHRecordingAttempt struct { // Recorder is the address of the recorder that was attempted. Recorder netip.AddrPort // FailureMessage is the error message of the failed attempt. FailureMessage string } // QueryFeatureRequest is a request sent to "/machine/feature/query" // to get instructions on how to enable a feature, such as Funnel, // for the node's tailnet. // // See QueryFeatureResponse for response structure. type QueryFeatureRequest struct { // Feature is the string identifier for a feature. Feature string `json:",omitempty"` // NodeKey is the client's current node key. NodeKey key.NodePublic `json:",omitempty"` } // QueryFeatureResponse is the response to an QueryFeatureRequest. // See cli.enableFeatureInteractive for usage. type QueryFeatureResponse struct { // Complete is true when the feature is already enabled. Complete bool `json:",omitempty"` // Text holds lines to display in the CLI with information // about the feature and how to enable it. // // Lines are separated by newline characters. The final // newline may be omitted. Text string `json:",omitempty"` // URL is the link for the user to visit to take action on // enabling the feature. // // When empty, there is no action for this user to take. URL string `json:",omitempty"` // ShouldWait specifies whether the CLI should block and // wait for the user to enable the feature. // // If this is true, the enablement from the control server // is expected to be a quick and uninterrupted process for // the user, and blocking allows them to immediately start // using the feature once enabled without rerunning the // command (e.g. no need to re-run "funnel on"). // // The CLI can watch the IPN notification bus for changes in // required node capabilities to know when to continue. ShouldWait bool `json:",omitempty"` } // WebClientAuthResponse is the response to a web client authentication request // sent to "/machine/webclient/action" or "/machine/webclient/wait". // See client/web for usage. type WebClientAuthResponse struct { // ID is a unique identifier for the session auth request. // It can be supplied to "/machine/webclient/wait" to pause until // the session authentication has been completed. ID string `json:",omitempty"` // URL is the link for the user to visit to authenticate the session. // // When empty, there is no action for the user to take. URL string `json:",omitempty"` // Complete is true when the session authentication has been completed. Complete bool `json:",omitempty"` } // OverTLSPublicKeyResponse is the JSON response to /key?v= // over HTTPS (regular TLS) to the Tailscale control plane server, // where the 'v' argument is the client's current capability version // (previously known as the "MapRequest version"). // // The "OverTLS" prefix is to loudly declare that this exchange // doesn't happen over Noise and can be intercepted/MITM'ed by // enterprise/corp proxies where the organization can put TLS roots // on devices. type OverTLSPublicKeyResponse struct { // LegacyPublic specifies the control plane server's original // NaCl crypto_box machine key. // It will be zero for sufficiently new clients, based on their // advertised "v" parameter (the CurrentMapRequestVersion). // In that case, only the newer Noise-based transport may be used // using the PublicKey field. LegacyPublicKey key.MachinePublic `json:"legacyPublicKey"` // PublicKey specifies the server's public key for the // Noise-based control plane protocol. (see packages // control/controlbase and control/controlhttp) PublicKey key.MachinePublic `json:"publicKey"` } // TokenRequest is a request to get an OIDC ID token for an audience. // The token can be presented to any resource provider which offers OIDC // Federation. // // It is JSON-encoded and sent over Noise to "/machine/id-token". type TokenRequest struct { // CapVersion is the client's current CapabilityVersion. CapVersion CapabilityVersion // NodeKey is the client's current node key. NodeKey key.NodePublic // Audience the token is being requested for. Audience string } // TokenResponse is the response to a TokenRequest. type TokenResponse struct { // IDToken is a JWT encoding the following standard claims: // // `sub` | the MagicDNS name of the node // `aud` | Audience from the request // `exp` | Token expiry // `iat` | Token issuance time // `iss` | Issuer // `jti` | Random token identifier // `nbf` | Not before time // // It also encodes the following Tailscale specific claims: // // `key` | the node public key // `addresses` | the Tailscale IPs of the node // `nid` | the node ID // `node` | the name of the node // `domain` | the domain of the node, it has the same format as MapResponse.Domain. // `tags` | an array of on the node (like alice.github:tag:foo or example.com:tag:foo) // `user` | user emailish (like alice.github:alice@github or example.com:bob@example.com), if not tagged // `uid` | user ID, if not tagged IDToken string `json:"id_token"` } // PeerChange is an update to a node. type PeerChange struct { // NodeID is the node ID being mutated. If the NodeID is not // known in the current netmap, this update should be // ignored. (But the server will try not to send such useless // updates.) NodeID NodeID // DERPRegion, if non-zero, means that NodeID's home DERP // region ID is now this number. DERPRegion int `json:",omitempty"` // Cap, if non-zero, means that NodeID's capability version has changed. Cap CapabilityVersion `json:",omitempty"` // CapMap, if non-nil, means that NodeID's capability map has changed. CapMap NodeCapMap `json:",omitempty"` // Endpoints, if non-empty, means that NodeID's UDP Endpoints // have changed to these. Endpoints []netip.AddrPort `json:",omitempty"` // Key, if non-nil, means that the NodeID's wireguard public key changed. Key *key.NodePublic `json:",omitempty"` // KeySignature, if non-nil, means that the signature of the wireguard // public key has changed. KeySignature tkatype.MarshaledSignature `json:",omitempty"` // DiscoKey, if non-nil, means that the NodeID's discokey changed. DiscoKey *key.DiscoPublic `json:",omitempty"` // Online, if non-nil, means that the NodeID's online status changed. Online *bool `json:",omitempty"` // LastSeen, if non-nil, means that the NodeID's online status changed. LastSeen *time.Time `json:",omitempty"` // KeyExpiry, if non-nil, changes the NodeID's key expiry. KeyExpiry *time.Time `json:",omitempty"` } // DerpMagicIP is a fake WireGuard endpoint IP address that means to // use DERP. When used (in the Node.DERP field), the port number of // the WireGuard endpoint is the DERP region ID number to use. // // Mnemonic: 3.3.40 are numbers above the keys D, E, R, P. const DerpMagicIP = "127.3.3.40" var DerpMagicIPAddr = netip.MustParseAddr(DerpMagicIP) // EarlyNoise is the early payload that's sent over Noise but before the HTTP/2 // handshake when connecting to the coordination server. // // This exists to let the server push some early info to client for that // stateful HTTP/2+Noise connection without incurring an extra round trip. (This // would've used HTTP/2 server push, had Go's client-side APIs been available) type EarlyNoise struct { // NodeKeyChallenge is a random per-connection public key to be used by // the client to prove possession of a wireguard private key. NodeKeyChallenge key.ChallengePublic `json:"nodeKeyChallenge"` } // LBHeader is the HTTP request header used to provide a load balancer or // internal reverse proxy with information about the request body without the // reverse proxy needing to read the body to parse it out. Think of it akin to // an HTTP Host header or SNI. The value may be absent (notably for old clients) // but if present, it should match the request. A non-empty value that doesn't // match the request body's. // // The possible values depend on the request path, but for /machine (Noise) // requests, they'll usually be a node public key (in key.NodePublic.String // format), matching the Request JSON body's NodeKey. // // Note that this is not a security or authentication header; it's strictly // denormalized redundant data as an optimization. // // For some request types, the header may have multiple values. (e.g. OldNodeKey // vs NodeKey) const LBHeader = "Ts-Lb"