package group import ( "encoding/json" "errors" "io/fs" "log" "net/url" "os" "path" "path/filepath" "sort" "strings" "sync" "time" "github.com/pion/ice/v2" "github.com/pion/sdp/v3" "github.com/pion/webrtc/v3" "github.com/jech/galene/token" ) var Directory, DataDirectory string var UseMDNS bool var UDPMin, UDPMax uint16 var ErrNotAuthorised = errors.New("not authorised") var ErrAnonymousNotAuthorised = errors.New("anonymous users not authorised in this group") var ErrDuplicateUsername = errors.New("this username is taken") type UserError string func (err UserError) Error() string { return string(err) } type KickError struct { Id string Username *string Message string } func (err KickError) Error() string { m := "kicked out" if err.Message != "" { m += " (" + err.Message + ")" } if err.Username != nil && *err.Username != "" { m += " by " + *err.Username } return m } type ProtocolError string func (err ProtocolError) Error() string { return string(err) } type ChatHistoryEntry struct { Id string User *string Time time.Time Kind string Value interface{} } const ( LowBitrate = 100 * 1024 MinBitrate = LowBitrate * 2 MaxBitrate = 1024 * 1024 * 1024 ) type Group struct { name string mu sync.Mutex description *Description locked *string clients map[string]Client history []ChatHistoryEntry timestamp time.Time data map[string]interface{} } func (g *Group) Name() string { return g.name } func (g *Group) Locked() (bool, string) { g.mu.Lock() defer g.mu.Unlock() if g.locked != nil { return true, *g.locked } else { return false, "" } } func (g *Group) SetLocked(locked bool, message string) { g.mu.Lock() if locked { g.locked = &message } else { g.locked = nil } clients := g.getClientsUnlocked(nil) g.mu.Unlock() for _, c := range clients { c.Joined(g.Name(), "change") } } func (g *Group) Data() map[string]interface{} { g.mu.Lock() defer g.mu.Unlock() return g.data } func (g *Group) UpdateData(d map[string]interface{}) { g.mu.Lock() if g.data == nil { g.data = make(map[string]interface{}) } for k, v := range d { if v == nil { delete(g.data, k) } else { g.data[k] = v } } clients := g.getClientsUnlocked(nil) g.mu.Unlock() for _, c := range clients { c.Joined(g.Name(), "change") } } func (g *Group) Description() *Description { g.mu.Lock() defer g.mu.Unlock() return g.description } func (g *Group) ClientCount() int { g.mu.Lock() defer g.mu.Unlock() return len(g.clients) } func (g *Group) mayExpire() bool { g.mu.Lock() defer g.mu.Unlock() if g.description.Public { return false } if len(g.clients) > 0 { return false } return time.Since(g.timestamp) > maxHistoryAge(g.description) } var groups struct { mu sync.Mutex groups map[string]*Group } func (g *Group) API() (*webrtc.API, error) { g.mu.Lock() codecs := g.description.Codecs g.mu.Unlock() return APIFromNames(codecs) } func fmtpValue(fmtp, key string) string { fields := strings.Split(fmtp, ";") for _, f := range fields { kv := strings.SplitN(f, "=", 2) if len(kv) != 2 { continue } if kv[0] == key { return kv[1] } } return "" } func CodecPayloadType(codec webrtc.RTPCodecCapability) (webrtc.PayloadType, error) { switch strings.ToLower(codec.MimeType) { case "video/vp8": return 96, nil case "video/vp9": profile := fmtpValue(codec.SDPFmtpLine, "profile-id") switch profile { case "0": return 98, nil case "2": return 100, nil default: return 0, errors.New("unknown VP9 profile") } case "video/av1": return 35, nil case "video/h264": profile := fmtpValue(codec.SDPFmtpLine, "profile-level-id") if len(profile) < 4 { return 0, errors.New("malforned H.264 profile") } switch strings.ToLower(profile[:4]) { case "4200": return 102, nil case "42e0": return 108, nil default: return 0, errors.New("unknown H.264 profile") } case "audio/opus": return 111, nil case "audio/g722": return 9, nil case "audio/pcmu": return 0, nil case "audio/pcma": return 8, nil default: return 0, errors.New("unknown codec") } } func codecsFromName(name string) ([]webrtc.RTPCodecParameters, error) { fb := []webrtc.RTCPFeedback{ {"goog-remb", ""}, {"nack", ""}, {"nack", "pli"}, {"ccm", "fir"}, } var codecs []webrtc.RTPCodecCapability switch name { case "vp8": codecs = []webrtc.RTPCodecCapability{ { "video/VP8", 90000, 0, "", fb, }, } case "vp9": codecs = []webrtc.RTPCodecCapability{ { "video/VP9", 90000, 0, "profile-id=0", fb, }, { "video/VP9", 90000, 0, "profile-id=2", fb, }, } case "av1": codecs = []webrtc.RTPCodecCapability{ { "video/AV1", 90000, 0, "", fb, }, } case "h264": codecs = []webrtc.RTPCodecCapability{ { "video/H264", 90000, 0, "level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42e01f", fb, }, } case "opus": codecs = []webrtc.RTPCodecCapability{ { "audio/opus", 48000, 2, "minptime=10;useinbandfec=1;stereo=1;sprop-stereo=1", nil, }, } case "g722": codecs = []webrtc.RTPCodecCapability{ { "audio/G722", 8000, 1, "", nil, }, } case "pcmu": codecs = []webrtc.RTPCodecCapability{ { "audio/PCMU", 8000, 1, "", nil, }, } case "pcma": codecs = []webrtc.RTPCodecCapability{ { "audio/PCMU", 8000, 1, "", nil, }, } default: return nil, errors.New("unknown codec") } parms := make([]webrtc.RTPCodecParameters, 0, len(codecs)) for _, c := range codecs { ptype, err := CodecPayloadType(c) if err != nil { log.Printf("Couldn't determine ptype for codec %v: %v", c.MimeType, err) continue } parms = append(parms, webrtc.RTPCodecParameters{ RTPCodecCapability: c, PayloadType: ptype, }) } return parms, nil } func APIFromCodecs(codecs []webrtc.RTPCodecParameters) (*webrtc.API, error) { s := webrtc.SettingEngine{} s.SetSRTPReplayProtectionWindow(512) if !UseMDNS { s.SetICEMulticastDNSMode(ice.MulticastDNSModeDisabled) } m := webrtc.MediaEngine{} for _, codec := range codecs { tpe := webrtc.RTPCodecTypeVideo if strings.HasPrefix(strings.ToLower(codec.MimeType), "audio/") { tpe = webrtc.RTPCodecTypeAudio } err := m.RegisterCodec(codec, tpe) if err != nil { log.Printf("%v", err) continue } } if UDPMin > 0 && UDPMax > 0 { s.SetEphemeralUDPPortRange(UDPMin, UDPMax) } m.RegisterHeaderExtension( webrtc.RTPHeaderExtensionCapability{sdp.SDESMidURI}, webrtc.RTPCodecTypeVideo) m.RegisterHeaderExtension( webrtc.RTPHeaderExtensionCapability{sdp.SDESRTPStreamIDURI}, webrtc.RTPCodecTypeVideo) return webrtc.NewAPI( webrtc.WithSettingEngine(s), webrtc.WithMediaEngine(&m), ), nil } func APIFromNames(names []string) (*webrtc.API, error) { if len(names) == 0 { names = []string{"vp8", "opus"} } var codecs []webrtc.RTPCodecParameters for _, n := range names { cs, err := codecsFromName(n) if err != nil { log.Printf("Codec %v: %v", n, err) continue } codecs = append(codecs, cs...) } return APIFromCodecs(codecs) } func Add(name string, desc *Description) (*Group, error) { g, notify, err := add(name, desc) for _, c := range notify { c.Joined(g.Name(), "change") } return g, err } func validGroupName(name string) bool { if filepath.Separator != '/' && strings.ContainsRune(name, filepath.Separator) { return false } s := path.Clean("/" + name) if s == "/" { return false } return s == "/"+name } func add(name string, desc *Description) (*Group, []Client, error) { if !validGroupName(name) { return nil, nil, UserError("illegal group name") } groups.mu.Lock() defer groups.mu.Unlock() if groups.groups == nil { groups.groups = make(map[string]*Group) } var err error g := groups.groups[name] if g == nil { if desc == nil { desc, err = readDescription(name) if err != nil { return nil, nil, err } } g = &Group{ name: name, description: desc, clients: make(map[string]Client), timestamp: time.Now(), } groups.groups[name] = g } g.mu.Lock() defer g.mu.Unlock() notify := false if desc != nil { if !descriptionMatch(g.description, desc) { g.description = desc notify = true } } else if !descriptionUnchanged(name, g.description) { desc, err = readDescription(name) if err != nil { if !os.IsNotExist(err) { log.Printf("Reading group %v: %v", name, err) } deleteUnlocked(g) return nil, nil, err } g.description = desc notify = true } autoLockKick(g) var clients []Client if notify { clients = g.getClientsUnlocked(nil) } return g, clients, nil } func Range(f func(g *Group) bool) { groups.mu.Lock() defer groups.mu.Unlock() for _, g := range groups.groups { ok := f(g) if !ok { break } } } func GetNames() []string { names := make([]string, 0) Range(func(g *Group) bool { names = append(names, g.name) return true }) return names } type SubGroup struct { Name string Clients int } func GetSubGroups(parent string) []SubGroup { prefix := parent + "/" subgroups := make([]SubGroup, 0) Range(func(g *Group) bool { if strings.HasPrefix(g.name, prefix) { g.mu.Lock() count := len(g.clients) g.mu.Unlock() if count > 0 { subgroups = append(subgroups, SubGroup{g.name, count}) } } return true }) return subgroups } func Get(name string) *Group { groups.mu.Lock() defer groups.mu.Unlock() if groups.groups == nil { return nil } return groups.groups[name] } func Delete(name string) bool { groups.mu.Lock() defer groups.mu.Unlock() g := groups.groups[name] if g == nil { return false } g.mu.Lock() defer g.mu.Unlock() return deleteUnlocked(g) } // Called with both groups.mu and g.mu taken. func deleteUnlocked(g *Group) bool { if len(g.clients) != 0 { return false } delete(groups.groups, g.name) return true } func member(v string, l []string) bool { for _, w := range l { if v == w { return true } } return false } func AddClient(group string, c Client, creds ClientCredentials) (*Group, error) { g, err := Add(group, nil) if err != nil { return nil, err } g.mu.Lock() defer g.mu.Unlock() clients := g.getClientsUnlocked(nil) if !member("system", c.Permissions()) { username, perms, err := g.getPermission(creds) if err != nil { return nil, err } c.SetUsername(username) c.SetPermissions(perms) if !member("op", perms) { if g.locked != nil { m := *g.locked if m == "" { m = "this group is locked" } return nil, UserError(m) } if g.description.Autokick { ops := false for _, c := range clients { if member("op", c.Permissions()) { ops = true break } } if !ops { return nil, UserError( "there are no operators " + "in this group", ) } } } if !member("op", perms) && g.description.MaxClients > 0 { if len(g.clients) >= g.description.MaxClients { return nil, UserError("too many users") } } } if g.clients[c.Id()] != nil { return nil, ProtocolError("duplicate client id") } g.clients[c.Id()] = c g.timestamp = time.Now() c.Joined(g.Name(), "join") id := c.Id() u := c.Username() p := c.Permissions() s := c.Data() c.PushClient(g.Name(), "add", c.Id(), u, p, s) for _, cc := range clients { pp := cc.Permissions() uu := cc.Username() c.PushClient(g.Name(), "add", cc.Id(), uu, pp, cc.Data()) cc.PushClient(g.Name(), "add", id, u, p, s) } return g, nil } // called locked func autoLockKick(g *Group) { if !(g.description.Autolock && g.locked == nil) && !g.description.Autokick { return } clients := g.getClientsUnlocked(nil) for _, c := range clients { if member("op", c.Permissions()) { return } } if g.description.Autolock && g.locked == nil { m := "this group is locked" g.locked = &m for _, c := range clients { c.Joined(g.Name(), "change") } } if g.description.Autokick { go kickall(g, "there are no operators in this group") } } func DelClient(c Client) { g := c.Group() if g == nil { return } g.mu.Lock() if g.clients[c.Id()] != c { log.Printf("Deleting unknown client") g.mu.Unlock() return } delete(g.clients, c.Id()) g.timestamp = time.Now() clients := g.getClientsUnlocked(nil) g.mu.Unlock() c.Joined(g.Name(), "leave") for _, cc := range clients { cc.PushClient( g.Name(), "delete", c.Id(), c.Username(), nil, nil, ) } autoLockKick(g) } func (g *Group) GetClients(except Client) []Client { g.mu.Lock() defer g.mu.Unlock() return g.getClientsUnlocked(except) } func (g *Group) getClientsUnlocked(except Client) []Client { clients := make([]Client, 0, len(g.clients)) for _, c := range g.clients { if c != except { clients = append(clients, c) } } return clients } func (g *Group) GetClient(id string) Client { g.mu.Lock() defer g.mu.Unlock() return g.getClientUnlocked(id) } func (g *Group) getClientUnlocked(id string) Client { for idd, c := range g.clients { if idd == id { return c } } return nil } func (g *Group) Range(f func(c Client) bool) { g.mu.Lock() defer g.mu.Unlock() for _, c := range g.clients { ok := f(c) if !ok { break } } } func kickall(g *Group, message string) { g.Range(func(c Client) bool { c.Kick("", nil, message) return true }) } func Shutdown(message string) { Range(func(g *Group) bool { g.SetLocked(true, message) kickall(g, message) return true }) } type warner interface { Warn(oponly bool, message string) error } func (g *Group) WallOps(message string) { clients := g.GetClients(nil) for _, c := range clients { w, ok := c.(warner) if !ok { continue } err := w.Warn(true, message) if err != nil { log.Printf("WallOps: %v", err) } } } const maxChatHistory = 50 func (g *Group) ClearChatHistory() { g.mu.Lock() defer g.mu.Unlock() g.history = nil } func (g *Group) AddToChatHistory(id string, user *string, time time.Time, kind string, value interface{}) { g.mu.Lock() defer g.mu.Unlock() if len(g.history) >= maxChatHistory { copy(g.history, g.history[1:]) g.history = g.history[:len(g.history)-1] } g.history = append(g.history, ChatHistoryEntry{Id: id, User: user, Time: time, Kind: kind, Value: value}, ) } func discardObsoleteHistory(h []ChatHistoryEntry, duration time.Duration) []ChatHistoryEntry { i := 0 for i < len(h) { if time.Since(h[i].Time) <= duration { break } i++ } if i > 0 { copy(h, h[i:]) h = h[:len(h)-i] } return h } func (g *Group) GetChatHistory() []ChatHistoryEntry { g.mu.Lock() defer g.mu.Unlock() g.history = discardObsoleteHistory( g.history, maxHistoryAge(g.description), ) h := make([]ChatHistoryEntry, len(g.history)) copy(h, g.history) return h } func matchClient(creds ClientCredentials, users []ClientPattern) (bool, bool) { if creds.Username == nil { return false, false } username := *creds.Username matched := false for _, u := range users { if u.Username == username { matched = true if u.Password == nil { return true, true } m, _ := u.Password.Match(creds.Password) if m { return true, true } } } if matched { return true, false } for _, u := range users { if u.Username == "" { if u.Password == nil { return true, true } m, _ := u.Password.Match(creds.Password) if m { return true, true } } } return false, false } // Configuration represents the contents of the data/config.json file. type Configuration struct { // The modtime and size of the file. These are used to detect // when a file has changed on disk. modTime time.Time `json:"-"` fileSize int64 `json:"-"` CanonicalHost string `json:"canonicalHost"` ProxyURL string `json:"proxyURL"` Admin []ClientPattern `json:"admin"` } func (conf Configuration) Zero() bool { return conf.modTime.Equal(time.Time{}) && conf.fileSize == 0 } var configuration struct { mu sync.Mutex configuration *Configuration } func GetConfiguration() (*Configuration, error) { configuration.mu.Lock() defer configuration.mu.Unlock() if configuration.configuration == nil { configuration.configuration = &Configuration{} } filename := filepath.Join(DataDirectory, "config.json") fi, err := os.Stat(filename) if err != nil { if os.IsNotExist(err) { if !configuration.configuration.Zero() { configuration.configuration = &Configuration{} } return configuration.configuration, nil } return nil, err } if configuration.configuration.modTime.Equal(fi.ModTime()) && configuration.configuration.fileSize == fi.Size() { return configuration.configuration, nil } f, err := os.Open(filename) if err != nil { return nil, err } defer f.Close() d := json.NewDecoder(f) d.DisallowUnknownFields() var conf Configuration err = d.Decode(&conf) if err != nil { return nil, err } configuration.configuration = &conf return configuration.configuration, nil } // Description represents a group description together with some metadata // about the JSON file it was deserialised from. type Description struct { // The file this was deserialised from. This is not necessarily // the name of the group, for example in case of a subgroup. FileName string `json:"-"` // The modtime and size of the file. These are used to detect // when a file has changed on disk. modTime time.Time `json:"-"` fileSize int64 `json:"-"` // The user-friendly group name DisplayName string `json:"displayName,omitempty"` // A user-readable description of the group. Description string `json:"description,omitempty"` // A user-readable contact, typically an e-mail address. Contact string `json:"contact,omitempty"` // A user-readable comment. Ignored by the server. Comment string `json:"comment,omitempty"` // Whether to display the group on the landing page. Public bool `json:"public,omitempty"` // A URL to redirect the group to. If this is not empty, most // other fields are ignored. Redirect string `json:"redirect,omitempty"` // The maximum number of simultaneous clients. Unlimited if 0. MaxClients int `json:"max-clients,omitempty"` // The time for which history entries are kept. MaxHistoryAge int `json:"max-history-age,omitempty"` // Whether users are allowed to log in with an empty username. AllowAnonymous bool `json:"allow-anonymous,omitempty"` // Whether recording is allowed. AllowRecording bool `json:"allow-recording,omitempty"` // Whether subgroups are created on the fly. AllowSubgroups bool `json:"allow-subgroups,omitempty"` // Whether to lock the group when the last op logs out. Autolock bool `json:"autolock,omitempty"` // Whether to kick all users when the last op logs out. Autokick bool `json:"autokick,omitempty"` // A list of logins for ops. Op []ClientPattern `json:"op,omitempty"` // A list of logins for presenters. Presenter []ClientPattern `json:"presenter,omitempty"` // A list of logins for non-presenting users. Other []ClientPattern `json:"other,omitempty"` // The (public) keys used for token authentication. AuthKeys []map[string]interface{} `json:"authKeys"` // The URL of the authentication server, if any. AuthServer string `json:"authServer"` // The URL of the authentication portal, if any. AuthPortal string `json:"authPortal"` // Codec preferences. If empty, a suitable default is chosen in // the APIFromNames function. Codecs []string `json:"codecs,omitempty"` } const DefaultMaxHistoryAge = 4 * time.Hour func maxHistoryAge(desc *Description) time.Duration { if desc.MaxHistoryAge != 0 { return time.Duration(desc.MaxHistoryAge) * time.Second } return DefaultMaxHistoryAge } func openDescriptionFile(name string) (*os.File, string, bool, error) { isParent := false for name != "" { fileName := filepath.Join( Directory, path.Clean("/"+name)+".json", ) r, err := os.Open(fileName) if !os.IsNotExist(err) { return r, fileName, isParent, err } isParent = true name, _ = path.Split(name) name = strings.TrimRight(name, "/") } return nil, "", false, os.ErrNotExist } func statDescriptionFile(name string) (os.FileInfo, string, bool, error) { isParent := false for name != "" { fileName := filepath.Join( Directory, path.Clean("/"+name)+".json", ) fi, err := os.Stat(fileName) if !os.IsNotExist(err) { return fi, fileName, isParent, err } isParent = true name, _ = path.Split(name) name = strings.TrimRight(name, "/") } return nil, "", false, os.ErrNotExist } // descriptionMatch returns true if the description hasn't changed between // d1 and d2 func descriptionMatch(d1, d2 *Description) bool { if d1.FileName != d2.FileName { return false } if d1.fileSize != d2.fileSize || !d1.modTime.Equal(d2.modTime) { return false } return true } // descriptionUnchanged returns true if a group's description hasn't // changed since it was last read. func descriptionUnchanged(name string, desc *Description) bool { fi, fileName, _, err := statDescriptionFile(name) if err != nil || fileName != desc.FileName { return false } if fi.Size() != desc.fileSize || !fi.ModTime().Equal(desc.modTime) { return false } return true } // GetDescription gets a group description, either from cache or from disk func GetDescription(name string) (*Description, error) { g := Get(name) if g != nil { if descriptionUnchanged(name, g.description) { return g.description, nil } } return readDescription(name) } // readDescription reads a group's description from disk func readDescription(name string) (*Description, error) { r, fileName, isParent, err := openDescriptionFile(name) if err != nil { return nil, err } defer r.Close() var desc Description fi, err := r.Stat() if err != nil { return nil, err } d := json.NewDecoder(r) d.DisallowUnknownFields() err = d.Decode(&desc) if err != nil { return nil, err } if isParent { if !desc.AllowSubgroups { return nil, os.ErrNotExist } desc.Public = false desc.Description = "" } desc.FileName = fileName desc.fileSize = fi.Size() desc.modTime = fi.ModTime() return &desc, nil } // called locked func (g *Group) getPasswordPermission(creds ClientCredentials) ([]string, error) { desc := g.description if creds.Username == nil { return nil, errors.New("username not provided") } if !desc.AllowAnonymous && *creds.Username == "" { return nil, ErrAnonymousNotAuthorised } if found, good := matchClient(creds, desc.Op); found { if good { if desc.AllowRecording { return []string{"op", "present", "record"}, nil } return []string{"op", "present"}, nil } return nil, ErrNotAuthorised } if found, good := matchClient(creds, desc.Presenter); found { if good { return []string{"present"}, nil } return nil, ErrNotAuthorised } if found, good := matchClient(creds, desc.Other); found { if good { return nil, nil } return nil, ErrNotAuthorised } return nil, ErrNotAuthorised } // Return true if there is a user entry with the given username. // Always return false for an empty username. func (g *Group) UserExists(username string) bool { g.mu.Lock() defer g.mu.Unlock() return g.userExists(username) } // called locked func (g *Group) userExists(username string) bool { if username == "" { return false } desc := g.description for _, ps := range [][]ClientPattern{ desc.Op, desc.Presenter, desc.Other, } { for _, p := range ps { if p.Username == username { return true } } } return false } // called locked func (g *Group) getPermission(creds ClientCredentials) (string, []string, error) { desc := g.description var username string var perms []string if creds.Token != "" { tok, err := token.Parse(creds.Token, desc.AuthKeys) if err != nil { return "", nil, err } conf, err := GetConfiguration() if err != nil { return "", nil, err } username, perms, err = tok.Check(conf.CanonicalHost, g.name, creds.Username) if err != nil { return "", nil, err } if username == "" && creds.Username != nil { if g.userExists(*creds.Username) { return "", nil, ErrDuplicateUsername } username = *creds.Username } } else if creds.Username != nil { username = *creds.Username var err error perms, err = g.getPasswordPermission(creds) if err != nil { return "", nil, err } } else { return "", nil, errors.New("neither username nor token provided") } return username, perms, nil } func (g *Group) GetPermission(creds ClientCredentials) (string, []string, error) { g.mu.Lock() defer g.mu.Unlock() return g.getPermission(creds) } type Status struct { Name string `json:"name"` Redirect string `json:"redirect,omitempty"` Location string `json:"location,omitempty"` Endpoint string `json:"endpoint,omitempty"` DisplayName string `json:"displayName,omitempty"` Description string `json:"description,omitempty"` AuthServer string `json:"authServer,omitempty"` AuthPortal string `json:"authPortal,omitempty"` Locked bool `json:"locked,omitempty"` ClientCount *int `json:"clientCount,omitempty"` } // Status returns a group's status. // Base is the base URL for groups; if omitted, then both the Location and // Endpoint members are omitted from the result. func (g *Group) Status(authentified bool, base string) Status { desc := g.Description() if desc.Redirect != "" { return Status{ Name: g.name, Redirect: desc.Redirect, DisplayName: desc.DisplayName, Description: desc.Description, } } var location, endpoint string if base != "" { burl, err := url.Parse(base) if err == nil { wss := "wss" if burl.Scheme == "http" { wss = "ws" } l := url.URL{ Scheme: burl.Scheme, Host: burl.Host, Path: path.Join(burl.Path, g.name) + "/", } location = l.String() e := url.URL{ Scheme: wss, Host: burl.Host, Path: "/ws", } endpoint = e.String() } else { log.Printf("Couldn't parse base URL %v", base) } } d := Status{ Name: g.name, Location: location, Endpoint: endpoint, DisplayName: desc.DisplayName, AuthServer: desc.AuthServer, AuthPortal: desc.AuthPortal, Description: desc.Description, } if authentified || desc.Public { // these are considered private information locked, _ := g.Locked() count := g.ClientCount() d.Locked = locked d.ClientCount = &count } return d } func GetPublic(base string) []Status { gs := make([]Status, 0) Range(func(g *Group) bool { if g.Description().Public { gs = append(gs, g.Status(false, base)) } return true }) sort.Slice(gs, func(i, j int) bool { return gs[i].Name < gs[j].Name }) return gs } // Update checks that all in-memory groups are up-to-date and updates the // list of public groups. It also removes from memory any non-public // groups that haven't been accessed in maxHistoryAge. func Update() { _, err := GetConfiguration() if err != nil { log.Printf("%v: %v", filepath.Join(DataDirectory, "config.json"), err, ) } names := GetNames() for _, name := range names { g := Get(name) if g == nil { continue } deleted := false if g.mayExpire() { // Delete checks if the group is still empty deleted = Delete(name) } // update group description if !deleted { Add(name, nil) } } err = filepath.WalkDir( Directory, func(path string, d fs.DirEntry, err error) error { if err != nil { log.Printf("Group file %v: %v", path, err) return nil } if d.IsDir() { return nil } filename, err := filepath.Rel(Directory, path) if err != nil { log.Printf("Group file %v: %v", path, err) return nil } if !strings.HasSuffix(filename, ".json") { log.Printf( "Unexpected extension for group file %v", path, ) return nil } base := filepath.Base(filename) if base[0] == '.' { log.Printf("Group file %v ignored", filename) return nil } name := strings.TrimSuffix(filename, ".json") desc, err := GetDescription(name) if err != nil { log.Printf("Group file %v: %v", path, err) return nil } if desc.Public { Add(name, desc) } return nil }, ) if err != nil { log.Printf("Couldn't read groups: %v", err) } }