package headscale import ( "encoding/json" "fmt" "log" "sort" "strconv" "time" "gorm.io/datatypes" "inet.af/netaddr" "tailscale.com/tailcfg" "tailscale.com/types/wgkey" ) // Machine is a Headscale client type Machine struct { ID uint64 `gorm:"primary_key"` MachineKey string `gorm:"type:varchar(64);unique_index"` NodeKey string DiscoKey string IPAddress string Name string NamespaceID uint Namespace Namespace `gorm:"foreignKey:NamespaceID"` Registered bool // temp RegisterMethod string AuthKeyID uint AuthKey *PreAuthKey LastSeen *time.Time Expiry *time.Time HostInfo datatypes.JSON Endpoints datatypes.JSON EnabledRoutes datatypes.JSON CreatedAt time.Time UpdatedAt time.Time DeletedAt *time.Time } // For the time being this method is rather naive func (m Machine) isAlreadyRegistered() bool { return m.Registered } func (m Machine) toNode() (*tailcfg.Node, error) { nKey, err := wgkey.ParseHex(m.NodeKey) if err != nil { return nil, err } mKey, err := wgkey.ParseHex(m.MachineKey) if err != nil { return nil, err } var discoKey tailcfg.DiscoKey if m.DiscoKey != "" { dKey, err := wgkey.ParseHex(m.DiscoKey) if err != nil { return nil, err } discoKey = tailcfg.DiscoKey(dKey) } else { discoKey = tailcfg.DiscoKey{} } addrs := []netaddr.IPPrefix{} ip, err := netaddr.ParseIPPrefix(fmt.Sprintf("%s/32", m.IPAddress)) if err != nil { return nil, err } addrs = append(addrs, ip) // missing the ipv6 ? allowedIPs := []netaddr.IPPrefix{} allowedIPs = append(allowedIPs, ip) // we append the node own IP, as it is required by the clients routesStr := []string{} if len(m.EnabledRoutes) != 0 { allwIps, err := m.EnabledRoutes.MarshalJSON() if err != nil { return nil, err } err = json.Unmarshal(allwIps, &routesStr) if err != nil { return nil, err } } for _, aip := range routesStr { ip, err := netaddr.ParseIPPrefix(aip) if err != nil { return nil, err } allowedIPs = append(allowedIPs, ip) } endpoints := []string{} if len(m.Endpoints) != 0 { be, err := m.Endpoints.MarshalJSON() if err != nil { return nil, err } err = json.Unmarshal(be, &endpoints) if err != nil { return nil, err } } hostinfo := tailcfg.Hostinfo{} if len(m.HostInfo) != 0 { hi, err := m.HostInfo.MarshalJSON() if err != nil { return nil, err } err = json.Unmarshal(hi, &hostinfo) if err != nil { return nil, err } } var derp string if hostinfo.NetInfo != nil { derp = fmt.Sprintf("127.3.3.40:%d", hostinfo.NetInfo.PreferredDERP) } else { derp = "127.3.3.40:0" // Zero means disconnected or unknown. } n := tailcfg.Node{ ID: tailcfg.NodeID(m.ID), // this is the actual ID StableID: tailcfg.StableNodeID(strconv.FormatUint(m.ID, 10)), // in headscale, unlike tailcontrol server, IDs are permanent Name: hostinfo.Hostname, User: tailcfg.UserID(m.NamespaceID), Key: tailcfg.NodeKey(nKey), KeyExpiry: *m.Expiry, Machine: tailcfg.MachineKey(mKey), DiscoKey: discoKey, Addresses: addrs, AllowedIPs: allowedIPs, Endpoints: endpoints, DERP: derp, Hostinfo: hostinfo, Created: m.CreatedAt, LastSeen: m.LastSeen, KeepAlive: true, MachineAuthorized: m.Registered, } return &n, nil } func (h *Headscale) getPeers(m Machine) (*[]*tailcfg.Node, error) { db, err := h.db() if err != nil { log.Printf("Cannot open DB: %s", err) return nil, err } machines := []Machine{} if err = db.Where("namespace_id = ? AND machine_key <> ? AND registered", m.NamespaceID, m.MachineKey).Find(&machines).Error; err != nil { log.Printf("Error accessing db: %s", err) return nil, err } peers := []*tailcfg.Node{} for _, mn := range machines { peer, err := mn.toNode() if err != nil { return nil, err } peers = append(peers, peer) } sort.Slice(peers, func(i, j int) bool { return peers[i].ID < peers[j].ID }) return &peers, nil } // GetMachine finds a Machine by name and namespace and returns the Machine struct func (h *Headscale) GetMachine(namespace string, name string) (*Machine, error) { machines, err := h.ListMachinesInNamespace(namespace) if err != nil { return nil, err } for _, m := range *machines { if m.Name == name { return &m, nil } } return nil, fmt.Errorf("not found") } // GetHostInfo returns a Hostinfo struct for the machine func (m *Machine) GetHostInfo() (*tailcfg.Hostinfo, error) { hostinfo := tailcfg.Hostinfo{} if len(m.HostInfo) != 0 { hi, err := m.HostInfo.MarshalJSON() if err != nil { return nil, err } err = json.Unmarshal(hi, &hostinfo) if err != nil { return nil, err } } return &hostinfo, nil }