package hotline
-import (
- "bufio"
- "bytes"
- "encoding/binary"
- "fmt"
- "github.com/davecgh/go-spew/spew"
- "gopkg.in/yaml.v3"
- "io"
- "math/big"
- "os"
- "path"
- "path/filepath"
- "sort"
- "strings"
- "time"
-)
-
// HandlerFunc is the signature of a func to handle a Hotline transaction.
type HandlerFunc func(*ClientConn, *Transaction) []Transaction
-// TransactionHandlers maps a transaction type to a handler function.
-var TransactionHandlers = map[TranType]HandlerFunc{
- TranAgreed: HandleTranAgreed,
- TranChatSend: HandleChatSend,
- TranDelNewsArt: HandleDelNewsArt,
- TranDelNewsItem: HandleDelNewsItem,
- TranDeleteFile: HandleDeleteFile,
- TranDeleteUser: HandleDeleteUser,
- TranDisconnectUser: HandleDisconnectUser,
- TranDownloadFile: HandleDownloadFile,
- TranDownloadFldr: HandleDownloadFolder,
- TranGetClientInfoText: HandleGetClientInfoText,
- TranGetFileInfo: HandleGetFileInfo,
- TranGetFileNameList: HandleGetFileNameList,
- TranGetMsgs: HandleGetMsgs,
- TranGetNewsArtData: HandleGetNewsArtData,
- TranGetNewsArtNameList: HandleGetNewsArtNameList,
- TranGetNewsCatNameList: HandleGetNewsCatNameList,
- TranGetUser: HandleGetUser,
- TranGetUserNameList: HandleGetUserNameList,
- TranInviteNewChat: HandleInviteNewChat,
- TranInviteToChat: HandleInviteToChat,
- TranJoinChat: HandleJoinChat,
- TranKeepAlive: HandleKeepAlive,
- TranLeaveChat: HandleLeaveChat,
- TranListUsers: HandleListUsers,
- TranMoveFile: HandleMoveFile,
- TranNewFolder: HandleNewFolder,
- TranNewNewsCat: HandleNewNewsCat,
- TranNewNewsFldr: HandleNewNewsFldr,
- TranNewUser: HandleNewUser,
- TranUpdateUser: HandleUpdateUser,
- TranOldPostNews: HandleTranOldPostNews,
- TranPostNewsArt: HandlePostNewsArt,
- TranRejectChatInvite: HandleRejectChatInvite,
- TranSendInstantMsg: HandleSendInstantMsg,
- TranSetChatSubject: HandleSetChatSubject,
- TranMakeFileAlias: HandleMakeAlias,
- TranSetClientUserInfo: HandleSetClientUserInfo,
- TranSetFileInfo: HandleSetFileInfo,
- TranSetUser: HandleSetUser,
- TranUploadFile: HandleUploadFile,
- TranUploadFldr: HandleUploadFolder,
- TranUserBroadcast: HandleUserBroadcast,
- TranDownloadBanner: HandleDownloadBanner,
-}
-
-func HandleChatSend(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessSendChat) {
- return cc.NewErrReply(t, "You are not allowed to participate in chat.")
- }
-
- // Truncate long usernames
- trunc := fmt.Sprintf("%13s", cc.UserName)
- formattedMsg := fmt.Sprintf("\r%.14s: %s", trunc, t.GetField(FieldData).Data)
-
- // By holding the option key, Hotline chat allows users to send /me formatted messages like:
- // *** Halcyon does stuff
- // This is indicated by the presence of the optional field FieldChatOptions set to a value of 1.
- // Most clients do not send this option for normal chat messages.
- if t.GetField(FieldChatOptions).Data != nil && bytes.Equal(t.GetField(FieldChatOptions).Data, []byte{0, 1}) {
- formattedMsg = fmt.Sprintf("\r*** %s %s", cc.UserName, t.GetField(FieldData).Data)
- }
-
- // The ChatID field is used to identify messages as belonging to a private chat.
- // All clients *except* Frogblast omit this field for public chat, but Frogblast sends a value of 00 00 00 00.
- chatID := t.GetField(FieldChatID).Data
- if chatID != nil && !bytes.Equal([]byte{0, 0, 0, 0}, chatID) {
- privChat := cc.Server.PrivateChats[[4]byte(chatID)]
-
- // send the message to all connected clients of the private chat
- for _, c := range privChat.ClientConn {
- res = append(res, NewTransaction(
- TranChatMsg,
- c.ID,
- NewField(FieldChatID, chatID),
- NewField(FieldData, []byte(formattedMsg)),
- ))
- }
- return res
- }
-
- //cc.Server.mux.Lock()
- for _, c := range cc.Server.Clients {
- if c == nil || cc.Account == nil {
- continue
- }
- // Skip clients that do not have the read chat permission.
- if c.Authorize(accessReadChat) {
- res = append(res, NewTransaction(TranChatMsg, c.ID, NewField(FieldData, []byte(formattedMsg))))
- }
- }
- //cc.Server.mux.Unlock()
-
- return res
-}
-
-// HandleSendInstantMsg sends instant message to the user on the current server.
-// Fields used in the request:
-//
-// 103 User ID
-// 113 Options
-// One of the following values:
-// - User message (myOpt_UserMessage = 1)
-// - Refuse message (myOpt_RefuseMessage = 2)
-// - Refuse chat (myOpt_RefuseChat = 3)
-// - Automatic response (myOpt_AutomaticResponse = 4)"
-// 101 Data Optional
-// 214 Quoting message Optional
-//
-// Fields used in the reply:
-// None
-func HandleSendInstantMsg(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessSendPrivMsg) {
- return cc.NewErrReply(t, "You are not allowed to send private messages.")
- }
-
- msg := t.GetField(FieldData)
- userID := t.GetField(FieldUserID)
-
- reply := NewTransaction(
- TranServerMsg,
- [2]byte(userID.Data),
- NewField(FieldData, msg.Data),
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- NewField(FieldOptions, []byte{0, 1}),
- )
-
- // Later versions of Hotline include the original message in the FieldQuotingMsg field so
- // the receiving client can display both the received message and what it is in reply to
- if t.GetField(FieldQuotingMsg).Data != nil {
- reply.Fields = append(reply.Fields, NewField(FieldQuotingMsg, t.GetField(FieldQuotingMsg).Data))
- }
-
- otherClient, ok := cc.Server.Clients[[2]byte(userID.Data)]
- if !ok {
- return res
- }
-
- // Check if target user has "Refuse private messages" flag
- if otherClient.Flags.IsSet(UserFlagRefusePM) {
- res = append(res,
- NewTransaction(
- TranServerMsg,
- cc.ID,
- NewField(FieldData, []byte(string(otherClient.UserName)+" does not accept private messages.")),
- NewField(FieldUserName, otherClient.UserName),
- NewField(FieldUserID, otherClient.ID[:]),
- NewField(FieldOptions, []byte{0, 2}),
- ),
- )
- } else {
- res = append(res, reply)
- }
-
- // Respond with auto reply if other client has it enabled
- if len(otherClient.AutoReply) > 0 {
- res = append(res,
- NewTransaction(
- TranServerMsg,
- cc.ID,
- NewField(FieldData, otherClient.AutoReply),
- NewField(FieldUserName, otherClient.UserName),
- NewField(FieldUserID, otherClient.ID[:]),
- NewField(FieldOptions, []byte{0, 1}),
- ),
- )
- }
-
- return append(res, cc.NewReply(t))
-}
-
-var fileTypeFLDR = [4]byte{0x66, 0x6c, 0x64, 0x72}
-
-func HandleGetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction) {
- fileName := t.GetField(FieldFileName).Data
- filePath := t.GetField(FieldFilePath).Data
-
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
- if err != nil {
- return res
- }
-
- fw, err := newFileWrapper(cc.Server.FS, fullFilePath, 0)
- if err != nil {
- return res
- }
-
- encodedName, err := txtEncoder.String(fw.name)
- if err != nil {
- return res
- }
-
- fields := []Field{
- NewField(FieldFileName, []byte(encodedName)),
- NewField(FieldFileTypeString, fw.ffo.FlatFileInformationFork.friendlyType()),
- NewField(FieldFileCreatorString, fw.ffo.FlatFileInformationFork.friendlyCreator()),
- NewField(FieldFileType, fw.ffo.FlatFileInformationFork.TypeSignature[:]),
- NewField(FieldFileCreateDate, fw.ffo.FlatFileInformationFork.CreateDate[:]),
- NewField(FieldFileModifyDate, fw.ffo.FlatFileInformationFork.ModifyDate[:]),
- }
-
- // Include the optional FileComment field if there is a comment.
- if len(fw.ffo.FlatFileInformationFork.Comment) != 0 {
- fields = append(fields, NewField(FieldFileComment, fw.ffo.FlatFileInformationFork.Comment))
- }
-
- // Include the FileSize field for files.
- if fw.ffo.FlatFileInformationFork.TypeSignature != fileTypeFLDR {
- fields = append(fields, NewField(FieldFileSize, fw.totalSize()))
- }
-
- res = append(res, cc.NewReply(t, fields...))
- return res
-}
-
-// HandleSetFileInfo updates a file or folder Name and/or comment from the Get Info window
-// Fields used in the request:
-// * 201 File Name
-// * 202 File path Optional
-// * 211 File new Name Optional
-// * 210 File comment Optional
-// Fields used in the reply: None
-func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction) {
- fileName := t.GetField(FieldFileName).Data
- filePath := t.GetField(FieldFilePath).Data
-
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
- if err != nil {
- return res
- }
-
- fi, err := cc.Server.FS.Stat(fullFilePath)
- if err != nil {
- return res
- }
-
- hlFile, err := newFileWrapper(cc.Server.FS, fullFilePath, 0)
- if err != nil {
- return res
- }
- if t.GetField(FieldFileComment).Data != nil {
- switch mode := fi.Mode(); {
- case mode.IsDir():
- if !cc.Authorize(accessSetFolderComment) {
- return cc.NewErrReply(t, "You are not allowed to set comments for folders.")
- }
- case mode.IsRegular():
- if !cc.Authorize(accessSetFileComment) {
- return cc.NewErrReply(t, "You are not allowed to set comments for files.")
- }
- }
-
- if err := hlFile.ffo.FlatFileInformationFork.setComment(t.GetField(FieldFileComment).Data); err != nil {
- return res
- }
- w, err := hlFile.infoForkWriter()
- if err != nil {
- return res
- }
- _, err = io.Copy(w, &hlFile.ffo.FlatFileInformationFork)
- if err != nil {
- return res
- }
- }
-
- fullNewFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, t.GetField(FieldFileNewName).Data)
- if err != nil {
- return nil
- }
-
- fileNewName := t.GetField(FieldFileNewName).Data
-
- if fileNewName != nil {
- switch mode := fi.Mode(); {
- case mode.IsDir():
- if !cc.Authorize(accessRenameFolder) {
- return cc.NewErrReply(t, "You are not allowed to rename folders.")
- }
- err = os.Rename(fullFilePath, fullNewFilePath)
- if os.IsNotExist(err) {
- return cc.NewErrReply(t, "Cannot rename folder "+string(fileName)+" because it does not exist or cannot be found.")
-
- }
- case mode.IsRegular():
- if !cc.Authorize(accessRenameFile) {
- return cc.NewErrReply(t, "You are not allowed to rename files.")
- }
- fileDir, err := readPath(cc.Server.Config.FileRoot, filePath, []byte{})
- if err != nil {
- return nil
- }
- hlFile.name, err = txtDecoder.String(string(fileNewName))
- if err != nil {
- return res
- }
-
- err = hlFile.move(fileDir)
- if os.IsNotExist(err) {
- return cc.NewErrReply(t, "Cannot rename file "+string(fileName)+" because it does not exist or cannot be found.")
- }
- if err != nil {
- return res
- }
- }
- }
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-// HandleDeleteFile deletes a file or folder
-// Fields used in the request:
-// * 201 File Name
-// * 202 File path
-// Fields used in the reply: none
-func HandleDeleteFile(cc *ClientConn, t *Transaction) (res []Transaction) {
- fileName := t.GetField(FieldFileName).Data
- filePath := t.GetField(FieldFilePath).Data
-
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
- if err != nil {
- return res
- }
-
- hlFile, err := newFileWrapper(cc.Server.FS, fullFilePath, 0)
- if err != nil {
- return res
- }
-
- fi, err := hlFile.dataFile()
- if err != nil {
- return cc.NewErrReply(t, "Cannot delete file "+string(fileName)+" because it does not exist or cannot be found.")
- }
-
- switch mode := fi.Mode(); {
- case mode.IsDir():
- if !cc.Authorize(accessDeleteFolder) {
- return cc.NewErrReply(t, "You are not allowed to delete folders.")
- }
- case mode.IsRegular():
- if !cc.Authorize(accessDeleteFile) {
- return cc.NewErrReply(t, "You are not allowed to delete files.")
- }
- }
-
- if err := hlFile.delete(); err != nil {
- return res
- }
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-// HandleMoveFile moves files or folders. Note: seemingly not documented
-func HandleMoveFile(cc *ClientConn, t *Transaction) (res []Transaction) {
- fileName := string(t.GetField(FieldFileName).Data)
-
- filePath, err := readPath(cc.Server.Config.FileRoot, t.GetField(FieldFilePath).Data, t.GetField(FieldFileName).Data)
- if err != nil {
- return res
- }
-
- fileNewPath, err := readPath(cc.Server.Config.FileRoot, t.GetField(FieldFileNewPath).Data, nil)
- if err != nil {
- return res
- }
-
- cc.logger.Info("Move file", "src", filePath+"/"+fileName, "dst", fileNewPath+"/"+fileName)
-
- hlFile, err := newFileWrapper(cc.Server.FS, filePath, 0)
- if err != nil {
- return res
- }
-
- fi, err := hlFile.dataFile()
- if err != nil {
- return cc.NewErrReply(t, "Cannot delete file "+fileName+" because it does not exist or cannot be found.")
- }
- switch mode := fi.Mode(); {
- case mode.IsDir():
- if !cc.Authorize(accessMoveFolder) {
- return cc.NewErrReply(t, "You are not allowed to move folders.")
- }
- case mode.IsRegular():
- if !cc.Authorize(accessMoveFile) {
- return cc.NewErrReply(t, "You are not allowed to move files.")
- }
- }
- if err := hlFile.move(fileNewPath); err != nil {
- return res
- }
- // TODO: handle other possible errors; e.g. fileWrapper delete fails due to fileWrapper permission issue
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-func HandleNewFolder(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessCreateFolder) {
- return cc.NewErrReply(t, "You are not allowed to create folders.")
- }
- folderName := string(t.GetField(FieldFileName).Data)
-
- folderName = path.Join("/", folderName)
-
- var subPath string
-
- // FieldFilePath is only present for nested paths
- if t.GetField(FieldFilePath).Data != nil {
- var newFp FilePath
- _, err := newFp.Write(t.GetField(FieldFilePath).Data)
- if err != nil {
- return res
- }
-
- for _, pathItem := range newFp.Items {
- subPath = filepath.Join("/", subPath, string(pathItem.Name))
- }
- }
- newFolderPath := path.Join(cc.Server.Config.FileRoot, subPath, folderName)
- newFolderPath, err := txtDecoder.String(newFolderPath)
- if err != nil {
- return res
- }
-
- // TODO: check path and folder Name lengths
-
- if _, err := cc.Server.FS.Stat(newFolderPath); !os.IsNotExist(err) {
- msg := fmt.Sprintf("Cannot create folder \"%s\" because there is already a file or folder with that Name.", folderName)
- return cc.NewErrReply(t, msg)
- }
-
- if err := cc.Server.FS.Mkdir(newFolderPath, 0777); err != nil {
- msg := fmt.Sprintf("Cannot create folder \"%s\" because an error occurred.", folderName)
- return cc.NewErrReply(t, msg)
- }
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-func HandleSetUser(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessModifyUser) {
- return cc.NewErrReply(t, "You are not allowed to modify accounts.")
- }
-
- login := string(encodeString(t.GetField(FieldUserLogin).Data))
- userName := string(t.GetField(FieldUserName).Data)
-
- newAccessLvl := t.GetField(FieldUserAccess).Data
-
- account := cc.Server.Accounts[login]
- if account == nil {
- return cc.NewErrReply(t, "Account not found.")
- }
- account.Name = userName
- copy(account.Access[:], newAccessLvl)
-
- // If the password field is cleared in the Hotline edit user UI, the SetUser transaction does
- // not include FieldUserPassword
- if t.GetField(FieldUserPassword).Data == nil {
- account.Password = hashAndSalt([]byte(""))
- }
-
- if !bytes.Equal([]byte{0}, t.GetField(FieldUserPassword).Data) {
- account.Password = hashAndSalt(t.GetField(FieldUserPassword).Data)
- }
-
- out, err := yaml.Marshal(&account)
- if err != nil {
- return res
- }
- if err := os.WriteFile(filepath.Join(cc.Server.ConfigDir, "Users", login+".yaml"), out, 0666); err != nil {
- return res
- }
-
- // Notify connected clients logged in as the user of the new access level
- for _, c := range cc.Server.Clients {
- if c.Account.Login == login {
- newT := NewTransaction(TranUserAccess, c.ID, NewField(FieldUserAccess, newAccessLvl))
- res = append(res, newT)
-
- if c.Authorize(accessDisconUser) {
- c.Flags.Set(UserFlagAdmin, 1)
- } else {
- c.Flags.Set(UserFlagAdmin, 0)
- }
-
- c.Account.Access = account.Access
-
- cc.sendAll(
- TranNotifyChangeUser,
- NewField(FieldUserID, c.ID[:]),
- NewField(FieldUserFlags, c.Flags[:]),
- NewField(FieldUserName, c.UserName),
- NewField(FieldUserIconID, c.Icon),
- )
- }
- }
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-func HandleGetUser(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessOpenUser) {
- return cc.NewErrReply(t, "You are not allowed to view accounts.")
- }
-
- account := cc.Server.Accounts[string(t.GetField(FieldUserLogin).Data)]
- if account == nil {
- return cc.NewErrReply(t, "Account does not exist.")
- }
-
- res = append(res, cc.NewReply(t,
- NewField(FieldUserName, []byte(account.Name)),
- NewField(FieldUserLogin, encodeString(t.GetField(FieldUserLogin).Data)),
- NewField(FieldUserPassword, []byte(account.Password)),
- NewField(FieldUserAccess, account.Access[:]),
- ))
- return res
-}
-
-func HandleListUsers(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessOpenUser) {
- return cc.NewErrReply(t, "You are not allowed to view accounts.")
- }
-
- var userFields []Field
- for _, acc := range cc.Server.Accounts {
- accCopy := *acc
- b, err := io.ReadAll(&accCopy)
- if err != nil {
- return res
- }
-
- userFields = append(userFields, NewField(FieldData, b))
- }
-
- res = append(res, cc.NewReply(t, userFields...))
- return res
-}
-
-// HandleUpdateUser is used by the v1.5+ multi-user editor to perform account editing for multiple users at a time.
-// An update can be a mix of these actions:
-// * Create user
-// * Delete user
-// * Modify user (including renaming the account login)
-//
-// The Transaction sent by the client includes one data field per user that was modified. This data field in turn
-// contains another data field encoded in its payload with a varying number of sub fields depending on which action is
-// performed. This seems to be the only place in the Hotline protocol where a data field contains another data field.
-func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction) {
- for _, field := range t.Fields {
- var subFields []Field
-
- // Create a new scanner for parsing incoming bytes into transaction tokens
- scanner := bufio.NewScanner(bytes.NewReader(field.Data[2:]))
- scanner.Split(fieldScanner)
-
- for i := 0; i < int(binary.BigEndian.Uint16(field.Data[0:2])); i++ {
- scanner.Scan()
-
- var field Field
- if _, err := field.Write(scanner.Bytes()); err != nil {
- return res
- }
- subFields = append(subFields, field)
- }
-
- // If there's only one subfield, that indicates this is a delete operation for the login in FieldData
- if len(subFields) == 1 {
- if !cc.Authorize(accessDeleteUser) {
- return cc.NewErrReply(t, "You are not allowed to delete accounts.")
- }
-
- login := string(encodeString(getField(FieldData, &subFields).Data))
- cc.logger.Info("DeleteUser", "login", login)
-
- if err := cc.Server.DeleteUser(login); err != nil {
- return res
- }
- continue
- }
-
- // login of the account to update
- var accountToUpdate, loginToRename string
-
- // If FieldData is included, this is a rename operation where FieldData contains the login of the existing
- // account and FieldUserLogin contains the new login.
- if getField(FieldData, &subFields) != nil {
- loginToRename = string(encodeString(getField(FieldData, &subFields).Data))
- }
- userLogin := string(encodeString(getField(FieldUserLogin, &subFields).Data))
- if loginToRename != "" {
- accountToUpdate = loginToRename
- } else {
- accountToUpdate = userLogin
- }
-
- // Check if accountToUpdate has an existing account. If so, we know we are updating an existing user.
- if acc, ok := cc.Server.Accounts[accountToUpdate]; ok {
- if loginToRename != "" {
- cc.logger.Info("RenameUser", "prevLogin", accountToUpdate, "newLogin", userLogin)
- } else {
- cc.logger.Info("UpdateUser", "login", accountToUpdate)
- }
-
- // account exists, so this is an update action
- if !cc.Authorize(accessModifyUser) {
- return cc.NewErrReply(t, "You are not allowed to modify accounts.")
- }
-
- // This part is a bit tricky. There are three possibilities:
- // 1) The transaction is intended to update the password.
- // In this case, FieldUserPassword is sent with the new password.
- // 2) The transaction is intended to remove the password.
- // In this case, FieldUserPassword is not sent.
- // 3) The transaction updates the users access bits, but not the password.
- // In this case, FieldUserPassword is sent with zero as the only byte.
- if getField(FieldUserPassword, &subFields) != nil {
- newPass := getField(FieldUserPassword, &subFields).Data
- if !bytes.Equal([]byte{0}, newPass) {
- acc.Password = hashAndSalt(newPass)
- }
- } else {
- acc.Password = hashAndSalt([]byte(""))
- }
-
- if getField(FieldUserAccess, &subFields) != nil {
- copy(acc.Access[:], getField(FieldUserAccess, &subFields).Data)
- }
-
- err := cc.Server.UpdateUser(
- string(encodeString(getField(FieldData, &subFields).Data)),
- string(encodeString(getField(FieldUserLogin, &subFields).Data)),
- string(getField(FieldUserName, &subFields).Data),
- acc.Password,
- acc.Access,
- )
- if err != nil {
- return res
- }
- } else {
- if !cc.Authorize(accessCreateUser) {
- return cc.NewErrReply(t, "You are not allowed to create new accounts.")
- }
-
- cc.logger.Info("CreateUser", "login", userLogin)
-
- newAccess := accessBitmap{}
- copy(newAccess[:], getField(FieldUserAccess, &subFields).Data)
-
- // Prevent account from creating new account with greater permission
- for i := 0; i < 64; i++ {
- if newAccess.IsSet(i) {
- if !cc.Authorize(i) {
- return cc.NewErrReply(t, "Cannot create account with more access than yourself.")
- }
- }
- }
-
- err := cc.Server.NewUser(userLogin, string(getField(FieldUserName, &subFields).Data), string(getField(FieldUserPassword, &subFields).Data), newAccess)
- if err != nil {
- return cc.NewErrReply(t, "Cannot create account because there is already an account with that login.")
- }
- }
- }
-
- return append(res, cc.NewReply(t))
-}
-
-// HandleNewUser creates a new user account
-func HandleNewUser(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessCreateUser) {
- return cc.NewErrReply(t, "You are not allowed to create new accounts.")
- }
-
- login := string(encodeString(t.GetField(FieldUserLogin).Data))
-
- // If the account already dataFile, reply with an error
- if _, ok := cc.Server.Accounts[login]; ok {
- return cc.NewErrReply(t, "Cannot create account "+login+" because there is already an account with that login.")
- }
-
- newAccess := accessBitmap{}
- copy(newAccess[:], t.GetField(FieldUserAccess).Data)
-
- // Prevent account from creating new account with greater permission
- for i := 0; i < 64; i++ {
- if newAccess.IsSet(i) {
- if !cc.Authorize(i) {
- return cc.NewErrReply(t, "Cannot create account with more access than yourself.")
- }
- }
- }
-
- if err := cc.Server.NewUser(login, string(t.GetField(FieldUserName).Data), string(t.GetField(FieldUserPassword).Data), newAccess); err != nil {
- return cc.NewErrReply(t, "Cannot create account because there is already an account with that login.")
- }
-
- return append(res, cc.NewReply(t))
-}
-
-func HandleDeleteUser(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessDeleteUser) {
- return cc.NewErrReply(t, "You are not allowed to delete accounts.")
- }
-
- login := string(encodeString(t.GetField(FieldUserLogin).Data))
-
- if err := cc.Server.DeleteUser(login); err != nil {
- return res
- }
-
- return append(res, cc.NewReply(t))
-}
-
-// HandleUserBroadcast sends an Administrator Message to all connected clients of the server
-func HandleUserBroadcast(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessBroadcast) {
- return cc.NewErrReply(t, "You are not allowed to send broadcast messages.")
- }
-
- cc.sendAll(
- TranServerMsg,
- NewField(FieldData, t.GetField(FieldData).Data),
- NewField(FieldChatOptions, []byte{0}),
- )
-
- return append(res, cc.NewReply(t))
-}
-
-// HandleGetClientInfoText returns user information for the specific user.
-//
-// Fields used in the request:
-// 103 User ID
-//
-// Fields used in the reply:
-// 102 User Name
-// 101 Data User info text string
-func HandleGetClientInfoText(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessGetClientInfo) {
- return cc.NewErrReply(t, "You are not allowed to get client info.")
- }
-
- clientID := t.GetField(FieldUserID).Data
-
- clientConn := cc.Server.Clients[[2]byte(clientID)]
- if clientConn == nil {
- return cc.NewErrReply(t, "User not found.")
- }
-
- res = append(res, cc.NewReply(t,
- NewField(FieldData, []byte(clientConn.String())),
- NewField(FieldUserName, clientConn.UserName),
- ))
- return res
-}
-
-func HandleGetUserNameList(cc *ClientConn, t *Transaction) (res []Transaction) {
- return []Transaction{cc.NewReply(t, cc.Server.connectedUsers()...)}
-}
-
-func HandleTranAgreed(cc *ClientConn, t *Transaction) (res []Transaction) {
- if t.GetField(FieldUserName).Data != nil {
- if cc.Authorize(accessAnyName) {
- cc.UserName = t.GetField(FieldUserName).Data
- } else {
- cc.UserName = []byte(cc.Account.Name)
- }
- }
-
- cc.Icon = t.GetField(FieldUserIconID).Data
-
- cc.logger = cc.logger.With("Name", string(cc.UserName))
- cc.logger.Info("Login successful", "clientVersion", fmt.Sprintf("%v", func() int { i, _ := byteToInt(cc.Version); return i }()))
-
- options := t.GetField(FieldOptions).Data
- optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
-
- // Check refuse private PM option
-
- cc.flagsMU.Lock()
- defer cc.flagsMU.Unlock()
- cc.Flags.Set(UserFlagRefusePM, optBitmap.Bit(UserOptRefusePM))
-
- // Check refuse private chat option
- cc.Flags.Set(UserFlagRefusePChat, optBitmap.Bit(UserOptRefuseChat))
-
- // Check auto response
- if optBitmap.Bit(UserOptAutoResponse) == 1 {
- cc.AutoReply = t.GetField(FieldAutomaticResponse).Data
- }
-
- trans := cc.notifyOthers(
- NewTransaction(
- TranNotifyChangeUser, [2]byte{0, 0},
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- NewField(FieldUserIconID, cc.Icon),
- NewField(FieldUserFlags, cc.Flags[:]),
- ),
- )
- res = append(res, trans...)
-
- if cc.Server.Config.BannerFile != "" {
- res = append(res, NewTransaction(TranServerBanner, cc.ID, NewField(FieldBannerType, []byte("JPEG"))))
- }
-
- res = append(res, cc.NewReply(t))
-
- return res
-}
-
-// HandleTranOldPostNews updates the flat news
-// Fields used in this request:
-// 101 Data
-func HandleTranOldPostNews(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsPostArt) {
- return cc.NewErrReply(t, "You are not allowed to post news.")
- }
-
- cc.Server.flatNewsMux.Lock()
- defer cc.Server.flatNewsMux.Unlock()
-
- newsDateTemplate := defaultNewsDateFormat
- if cc.Server.Config.NewsDateFormat != "" {
- newsDateTemplate = cc.Server.Config.NewsDateFormat
- }
-
- newsTemplate := defaultNewsTemplate
- if cc.Server.Config.NewsDelimiter != "" {
- newsTemplate = cc.Server.Config.NewsDelimiter
- }
-
- newsPost := fmt.Sprintf(newsTemplate+"\r", cc.UserName, time.Now().Format(newsDateTemplate), t.GetField(FieldData).Data)
- newsPost = strings.ReplaceAll(newsPost, "\n", "\r")
-
- // update news in memory
- cc.Server.FlatNews = append([]byte(newsPost), cc.Server.FlatNews...)
-
- // update news on disk
- if err := cc.Server.FS.WriteFile(filepath.Join(cc.Server.ConfigDir, "MessageBoard.txt"), cc.Server.FlatNews, 0644); err != nil {
- return res
- }
-
- // Notify all clients of updated news
- cc.sendAll(
- TranNewMsg,
- NewField(FieldData, []byte(newsPost)),
- )
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-func HandleDisconnectUser(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessDisconUser) {
- return cc.NewErrReply(t, "You are not allowed to disconnect users.")
- }
-
- clientConn := cc.Server.Clients[[2]byte(t.GetField(FieldUserID).Data)]
-
- if clientConn.Authorize(accessCannotBeDiscon) {
- return cc.NewErrReply(t, clientConn.Account.Login+" is not allowed to be disconnected.")
- }
-
- // If FieldOptions is set, then the client IP is banned in addition to disconnected.
- // 00 01 = temporary ban
- // 00 02 = permanent ban
- if t.GetField(FieldOptions).Data != nil {
- switch t.GetField(FieldOptions).Data[1] {
- case 1:
- // send message: "You are temporarily banned on this server"
- cc.logger.Info("Disconnect & temporarily ban " + string(clientConn.UserName))
-
- res = append(res, NewTransaction(
- TranServerMsg,
- clientConn.ID,
- NewField(FieldData, []byte("You are temporarily banned on this server")),
- NewField(FieldChatOptions, []byte{0, 0}),
- ))
-
- banUntil := time.Now().Add(tempBanDuration)
- cc.Server.banList[strings.Split(clientConn.RemoteAddr, ":")[0]] = &banUntil
- case 2:
- // send message: "You are permanently banned on this server"
- cc.logger.Info("Disconnect & ban " + string(clientConn.UserName))
-
- res = append(res, NewTransaction(
- TranServerMsg,
- clientConn.ID,
- NewField(FieldData, []byte("You are permanently banned on this server")),
- NewField(FieldChatOptions, []byte{0, 0}),
- ))
-
- cc.Server.banList[strings.Split(clientConn.RemoteAddr, ":")[0]] = nil
- }
-
- err := cc.Server.writeBanList()
- if err != nil {
- return res
- }
- }
-
- // TODO: remove this awful hack
- go func() {
- time.Sleep(1 * time.Second)
- clientConn.Disconnect()
- }()
-
- return append(res, cc.NewReply(t))
-}
-
-// HandleGetNewsCatNameList returns a list of news categories for a path
-// Fields used in the request:
-// 325 News path (Optional)
-func HandleGetNewsCatNameList(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsReadArt) {
- return cc.NewErrReply(t, "You are not allowed to read news.")
- }
-
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
- cats := cc.Server.GetNewsCatByPath(pathStrs)
-
- // To store the keys in slice in sorted order
- keys := make([]string, len(cats))
- i := 0
- for k := range cats {
- keys[i] = k
- i++
- }
- sort.Strings(keys)
-
- var fieldData []Field
- for _, k := range keys {
- cat := cats[k]
-
- b, _ := io.ReadAll(&cat)
-
- fieldData = append(fieldData, NewField(FieldNewsCatListData15, b))
- }
-
- res = append(res, cc.NewReply(t, fieldData...))
- return res
-}
-
-func HandleNewNewsCat(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsCreateCat) {
- return cc.NewErrReply(t, "You are not allowed to create news categories.")
- }
-
- name := string(t.GetField(FieldNewsCatName).Data)
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
-
- cats := cc.Server.GetNewsCatByPath(pathStrs)
- cats[name] = NewsCategoryListData15{
- Name: name,
- Type: [2]byte{0, 3},
- Articles: map[uint32]*NewsArtData{},
- SubCats: make(map[string]NewsCategoryListData15),
- }
-
- if err := cc.Server.writeThreadedNews(); err != nil {
- return res
- }
- res = append(res, cc.NewReply(t))
- return res
+func (s *Server) HandleFunc(tranType [2]byte, handler HandlerFunc) {
+ s.handlers[tranType] = handler
}
-// Fields used in the request:
-// 322 News category Name
-// 325 News path
-func HandleNewNewsFldr(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsCreateFldr) {
- return cc.NewErrReply(t, "You are not allowed to create news folders.")
- }
-
- name := string(t.GetField(FieldFileName).Data)
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
-
- cats := cc.Server.GetNewsCatByPath(pathStrs)
- cats[name] = NewsCategoryListData15{
- Name: name,
- Type: [2]byte{0, 2},
- Articles: map[uint32]*NewsArtData{},
- SubCats: make(map[string]NewsCategoryListData15),
- }
- if err := cc.Server.writeThreadedNews(); err != nil {
- return res
- }
- res = append(res, cc.NewReply(t))
- return res
-}
-
-// HandleGetNewsArtData gets the list of article names at the specified news path.
-
-// Fields used in the request:
-// 325 News path Optional
-
-// Fields used in the reply:
-// 321 News article list data Optional
-func HandleGetNewsArtNameList(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsReadArt) {
- return cc.NewErrReply(t, "You are not allowed to read news.")
- }
-
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
-
- var cat NewsCategoryListData15
- cats := cc.Server.ThreadedNews.Categories
-
- for _, fp := range pathStrs {
- cat = cats[fp]
- cats = cats[fp].SubCats
- }
-
- nald := cat.GetNewsArtListData()
-
- b, err := io.ReadAll(&nald)
- if err != nil {
- return res
- }
-
- res = append(res, cc.NewReply(t, NewField(FieldNewsArtListData, b)))
- return res
-}
-
-// HandleGetNewsArtData requests information about the specific news article.
-// Fields used in the request:
-//
-// Request fields
-// 325 News path
-// 326 News article ID
-// 327 News article data flavor
-//
-// Fields used in the reply:
-// 328 News article title
-// 329 News article poster
-// 330 News article date
-// 331 Previous article ID
-// 332 Next article ID
-// 335 Parent article ID
-// 336 First child article ID
-// 327 News article data flavor "Should be “text/plain”
-// 333 News article data Optional (if data flavor is “text/plain”)
-func HandleGetNewsArtData(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsReadArt) {
- return cc.NewErrReply(t, "You are not allowed to read news.")
- }
-
- var cat NewsCategoryListData15
- cats := cc.Server.ThreadedNews.Categories
-
- for _, fp := range ReadNewsPath(t.GetField(FieldNewsPath).Data) {
- cat = cats[fp]
- cats = cats[fp].SubCats
- }
-
- // The official Hotline clients will send the article ID as 2 bytes if possible, but
- // some third party clients such as Frogblast and Heildrun will always send 4 bytes
- convertedID, err := byteToInt(t.GetField(FieldNewsArtID).Data)
- if err != nil {
- return res
- }
-
- art := cat.Articles[uint32(convertedID)]
- if art == nil {
- return append(res, cc.NewReply(t))
- }
-
- res = append(res, cc.NewReply(t,
- NewField(FieldNewsArtTitle, []byte(art.Title)),
- NewField(FieldNewsArtPoster, []byte(art.Poster)),
- NewField(FieldNewsArtDate, art.Date[:]),
- NewField(FieldNewsArtPrevArt, art.PrevArt[:]),
- NewField(FieldNewsArtNextArt, art.NextArt[:]),
- NewField(FieldNewsArtParentArt, art.ParentArt[:]),
- NewField(FieldNewsArt1stChildArt, art.FirstChildArt[:]),
- NewField(FieldNewsArtDataFlav, []byte("text/plain")),
- NewField(FieldNewsArtData, []byte(art.Data)),
- ))
- return res
-}
-
-// HandleDelNewsItem deletes an existing threaded news folder or category from the server.
-// Fields used in the request:
-// 325 News path
-// Fields used in the reply:
-// None
-func HandleDelNewsItem(cc *ClientConn, t *Transaction) (res []Transaction) {
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
-
- cats := cc.Server.ThreadedNews.Categories
- delName := pathStrs[len(pathStrs)-1]
- if len(pathStrs) > 1 {
- for _, fp := range pathStrs[0 : len(pathStrs)-1] {
- cats = cats[fp].SubCats
- }
- }
-
- if cats[delName].Type == [2]byte{0, 3} {
- if !cc.Authorize(accessNewsDeleteCat) {
- return cc.NewErrReply(t, "You are not allowed to delete news categories.")
- }
- } else {
- if !cc.Authorize(accessNewsDeleteFldr) {
- return cc.NewErrReply(t, "You are not allowed to delete news folders.")
- }
- }
-
- delete(cats, delName)
-
- if err := cc.Server.writeThreadedNews(); err != nil {
- return res
- }
-
- return append(res, cc.NewReply(t))
-}
-
-func HandleDelNewsArt(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsDeleteArt) {
- return cc.NewErrReply(t, "You are not allowed to delete news articles.")
-
- }
-
- // Request Fields
- // 325 News path
- // 326 News article ID
- // 337 News article – recursive delete Delete child articles (1) or not (0)
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
- ID, err := byteToInt(t.GetField(FieldNewsArtID).Data)
- if err != nil {
- return res
- }
-
- // TODO: Delete recursive
- cats := cc.Server.GetNewsCatByPath(pathStrs[:len(pathStrs)-1])
-
- catName := pathStrs[len(pathStrs)-1]
- cat := cats[catName]
-
- delete(cat.Articles, uint32(ID))
-
- cats[catName] = cat
- if err := cc.Server.writeThreadedNews(); err != nil {
- return res
- }
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-// Request fields
-// 325 News path
-// 326 News article ID ID of the parent article?
-// 328 News article title
-// 334 News article flags
-// 327 News article data flavor Currently “text/plain”
-// 333 News article data
-func HandlePostNewsArt(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsPostArt) {
- return cc.NewErrReply(t, "You are not allowed to post news articles.")
- }
-
- pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
- cats := cc.Server.GetNewsCatByPath(pathStrs[:len(pathStrs)-1])
-
- catName := pathStrs[len(pathStrs)-1]
- cat := cats[catName]
-
- artID, err := byteToInt(t.GetField(FieldNewsArtID).Data)
- if err != nil {
- return res
- }
- convertedArtID := uint32(artID)
- bs := make([]byte, 4)
- binary.BigEndian.PutUint32(bs, convertedArtID)
-
- cc.Server.mux.Lock()
- defer cc.Server.mux.Unlock()
-
- newArt := NewsArtData{
- Title: string(t.GetField(FieldNewsArtTitle).Data),
- Poster: string(cc.UserName),
- Date: toHotlineTime(time.Now()),
- ParentArt: [4]byte(bs),
- DataFlav: []byte("text/plain"),
- Data: string(t.GetField(FieldNewsArtData).Data),
- }
-
- var keys []int
- for k := range cat.Articles {
- keys = append(keys, int(k))
- }
-
- nextID := uint32(1)
- if len(keys) > 0 {
- sort.Ints(keys)
- prevID := uint32(keys[len(keys)-1])
- nextID = prevID + 1
-
- binary.BigEndian.PutUint32(newArt.PrevArt[:], prevID)
-
- // Set next article ID
- binary.BigEndian.PutUint32(cat.Articles[prevID].NextArt[:], nextID)
- }
-
- // Update parent article with first child reply
- parentID := convertedArtID
- if parentID != 0 {
- parentArt := cat.Articles[parentID]
-
- if parentArt.FirstChildArt == [4]byte{0, 0, 0, 0} {
- binary.BigEndian.PutUint32(parentArt.FirstChildArt[:], nextID)
- }
- }
-
- cat.Articles[nextID] = &newArt
-
- cats[catName] = cat
- if err := cc.Server.writeThreadedNews(); err != nil {
- return res
- }
-
- return append(res, cc.NewReply(t))
-}
-
-// HandleGetMsgs returns the flat news data
-func HandleGetMsgs(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessNewsReadArt) {
- return cc.NewErrReply(t, "You are not allowed to read news.")
- }
-
- res = append(res, cc.NewReply(t, NewField(FieldData, cc.Server.FlatNews)))
-
- return res
-}
-
-func HandleDownloadFile(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessDownloadFile) {
- return cc.NewErrReply(t, "You are not allowed to download files.")
- }
-
- fileName := t.GetField(FieldFileName).Data
- filePath := t.GetField(FieldFilePath).Data
- resumeData := t.GetField(FieldFileResumeData).Data
-
- var dataOffset int64
- var frd FileResumeData
- if resumeData != nil {
- if err := frd.UnmarshalBinary(t.GetField(FieldFileResumeData).Data); err != nil {
- return res
- }
- // TODO: handle rsrc fork offset
- dataOffset = int64(binary.BigEndian.Uint32(frd.ForkInfoList[0].DataSize[:]))
- }
-
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
- if err != nil {
- return res
- }
-
- hlFile, err := newFileWrapper(cc.Server.FS, fullFilePath, dataOffset)
- if err != nil {
- return res
- }
-
- xferSize := hlFile.ffo.TransferSize(0)
-
- ft := cc.newFileTransfer(FileDownload, fileName, filePath, xferSize)
-
- // TODO: refactor to remove this
- if resumeData != nil {
- var frd FileResumeData
- if err := frd.UnmarshalBinary(t.GetField(FieldFileResumeData).Data); err != nil {
- return res
- }
- ft.fileResumeData = &frd
- }
-
- // Optional field for when a HL v1.5+ client requests file preview
- // Used only for TEXT, JPEG, GIFF, BMP or PICT files
- // The value will always be 2
- if t.GetField(FieldFileTransferOptions).Data != nil {
- ft.options = t.GetField(FieldFileTransferOptions).Data
- xferSize = hlFile.ffo.FlatFileDataForkHeader.DataSize[:]
- }
-
- res = append(res, cc.NewReply(t,
- NewField(FieldRefNum, ft.refNum[:]),
- NewField(FieldWaitingCount, []byte{0x00, 0x00}), // TODO: Implement waiting count
- NewField(FieldTransferSize, xferSize),
- NewField(FieldFileSize, hlFile.ffo.FlatFileDataForkHeader.DataSize[:]),
- ))
-
- return res
-}
-
-// Download all files from the specified folder and sub-folders
-func HandleDownloadFolder(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessDownloadFile) {
- return cc.NewErrReply(t, "You are not allowed to download folders.")
- }
-
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, t.GetField(FieldFilePath).Data, t.GetField(FieldFileName).Data)
- if err != nil {
- return res
- }
-
- transferSize, err := CalcTotalSize(fullFilePath)
- if err != nil {
- return res
- }
- itemCount, err := CalcItemCount(fullFilePath)
- if err != nil {
- return res
- }
- spew.Dump(itemCount)
-
- fileTransfer := cc.newFileTransfer(FolderDownload, t.GetField(FieldFileName).Data, t.GetField(FieldFilePath).Data, transferSize)
-
- var fp FilePath
- _, err = fp.Write(t.GetField(FieldFilePath).Data)
- if err != nil {
- return res
- }
-
- res = append(res, cc.NewReply(t,
- NewField(FieldRefNum, fileTransfer.refNum[:]),
- NewField(FieldTransferSize, transferSize),
- NewField(FieldFolderItemCount, itemCount),
- NewField(FieldWaitingCount, []byte{0x00, 0x00}), // TODO: Implement waiting count
- ))
- return res
-}
-
-// Upload all files from the local folder and its subfolders to the specified path on the server
-// Fields used in the request
-// 201 File Name
-// 202 File path
-// 108 transfer size Total size of all items in the folder
-// 220 Folder item count
-// 204 File transfer options "Optional Currently set to 1" (TODO: ??)
-func HandleUploadFolder(cc *ClientConn, t *Transaction) (res []Transaction) {
- var fp FilePath
- if t.GetField(FieldFilePath).Data != nil {
- if _, err := fp.Write(t.GetField(FieldFilePath).Data); err != nil {
- return res
- }
- }
-
- // Handle special cases for Upload and Drop Box folders
- if !cc.Authorize(accessUploadAnywhere) {
- if !fp.IsUploadDir() && !fp.IsDropbox() {
- return cc.NewErrReply(t, fmt.Sprintf("Cannot accept upload of the folder \"%v\" because you are only allowed to upload to the \"Uploads\" folder.", string(t.GetField(FieldFileName).Data)))
- }
- }
-
- fileTransfer := cc.newFileTransfer(FolderUpload,
- t.GetField(FieldFileName).Data,
- t.GetField(FieldFilePath).Data,
- t.GetField(FieldTransferSize).Data,
- )
-
- fileTransfer.FolderItemCount = t.GetField(FieldFolderItemCount).Data
-
- return append(res, cc.NewReply(t, NewField(FieldRefNum, fileTransfer.refNum[:])))
-}
-
-// HandleUploadFile
-// Fields used in the request:
-// 201 File Name
-// 202 File path
-// 204 File transfer options "Optional
-// Used only to resume download, currently has value 2"
-// 108 File transfer size "Optional used if download is not resumed"
-func HandleUploadFile(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessUploadFile) {
- return cc.NewErrReply(t, "You are not allowed to upload files.")
- }
-
- fileName := t.GetField(FieldFileName).Data
- filePath := t.GetField(FieldFilePath).Data
- transferOptions := t.GetField(FieldFileTransferOptions).Data
- transferSize := t.GetField(FieldTransferSize).Data // not sent for resume
-
- var fp FilePath
- if filePath != nil {
- if _, err := fp.Write(filePath); err != nil {
- return res
- }
- }
-
- // Handle special cases for Upload and Drop Box folders
- if !cc.Authorize(accessUploadAnywhere) {
- if !fp.IsUploadDir() && !fp.IsDropbox() {
- return cc.NewErrReply(t, fmt.Sprintf("Cannot accept upload of the file \"%v\" because you are only allowed to upload to the \"Uploads\" folder.", string(fileName)))
- }
- }
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
- if err != nil {
- return res
- }
-
- if _, err := cc.Server.FS.Stat(fullFilePath); err == nil {
- return cc.NewErrReply(t, fmt.Sprintf("Cannot accept upload because there is already a file named \"%v\". Try choosing a different Name.", string(fileName)))
- }
-
- ft := cc.newFileTransfer(FileUpload, fileName, filePath, transferSize)
-
- replyT := cc.NewReply(t, NewField(FieldRefNum, ft.refNum[:]))
-
- // client has requested to resume a partially transferred file
- if transferOptions != nil {
- fileInfo, err := cc.Server.FS.Stat(fullFilePath + incompleteFileSuffix)
- if err != nil {
- return res
- }
-
- offset := make([]byte, 4)
- binary.BigEndian.PutUint32(offset, uint32(fileInfo.Size()))
-
- fileResumeData := NewFileResumeData([]ForkInfoList{
- *NewForkInfoList(offset),
- })
-
- b, _ := fileResumeData.BinaryMarshal()
-
- ft.TransferSize = offset
-
- replyT.Fields = append(replyT.Fields, NewField(FieldFileResumeData, b))
- }
-
- res = append(res, replyT)
- return res
-}
-
-func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction) {
- if len(t.GetField(FieldUserIconID).Data) == 4 {
- cc.Icon = t.GetField(FieldUserIconID).Data[2:]
- } else {
- cc.Icon = t.GetField(FieldUserIconID).Data
- }
- if cc.Authorize(accessAnyName) {
- cc.UserName = t.GetField(FieldUserName).Data
- }
-
- cc.flagsMU.Lock()
- defer cc.flagsMU.Unlock()
-
- // the options field is only passed by the client versions > 1.2.3.
- options := t.GetField(FieldOptions).Data
- if options != nil {
- optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
- flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(cc.Flags[:])))
-
- flagBitmap.SetBit(flagBitmap, UserFlagRefusePM, optBitmap.Bit(UserOptRefusePM))
- binary.BigEndian.PutUint16(cc.Flags[:], uint16(flagBitmap.Int64()))
-
- flagBitmap.SetBit(flagBitmap, UserFlagRefusePChat, optBitmap.Bit(UserOptRefuseChat))
- binary.BigEndian.PutUint16(cc.Flags[:], uint16(flagBitmap.Int64()))
-
- // Check auto response
- if optBitmap.Bit(UserOptAutoResponse) == 1 {
- cc.AutoReply = t.GetField(FieldAutomaticResponse).Data
- } else {
- cc.AutoReply = []byte{}
- }
- }
-
- for _, c := range cc.Server.Clients {
- res = append(res, NewTransaction(
- TranNotifyChangeUser,
- c.ID,
- NewField(FieldUserID, cc.ID[:]),
- NewField(FieldUserIconID, cc.Icon),
- NewField(FieldUserFlags, cc.Flags[:]),
- NewField(FieldUserName, cc.UserName),
- ))
- }
-
- return res
-}
-
-// HandleKeepAlive responds to keepalive transactions with an empty reply
-// * HL 1.9.2 Client sends keepalive msg every 3 minutes
-// * HL 1.2.3 Client doesn't send keepalives
-func HandleKeepAlive(cc *ClientConn, t *Transaction) (res []Transaction) {
- res = append(res, cc.NewReply(t))
-
- return res
-}
-
-func HandleGetFileNameList(cc *ClientConn, t *Transaction) (res []Transaction) {
- fullPath, err := readPath(
- cc.Server.Config.FileRoot,
- t.GetField(FieldFilePath).Data,
- nil,
- )
- if err != nil {
- return res
- }
-
- var fp FilePath
- if t.GetField(FieldFilePath).Data != nil {
- if _, err = fp.Write(t.GetField(FieldFilePath).Data); err != nil {
- return res
- }
- }
-
- // Handle special case for drop box folders
- if fp.IsDropbox() && !cc.Authorize(accessViewDropBoxes) {
- return cc.NewErrReply(t, "You are not allowed to view drop boxes.")
- }
-
- fileNames, err := getFileNameList(fullPath, cc.Server.Config.IgnoreFiles)
- if err != nil {
- return res
- }
-
- res = append(res, cc.NewReply(t, fileNames...))
-
- return res
-}
-
-// =================================
-// Hotline private chat flow
-// =================================
-// 1. ClientA sends TranInviteNewChat to server with user ID to invite
-// 2. Server creates new ChatID
-// 3. Server sends TranInviteToChat to invitee
-// 4. Server replies to ClientA with new Chat ID
-//
-// A dialog box pops up in the invitee client with options to accept or decline the invitation.
-// If Accepted is clicked:
-// 1. ClientB sends TranJoinChat with FieldChatID
-
-// HandleInviteNewChat invites users to new private chat
-func HandleInviteNewChat(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessOpenChat) {
- return cc.NewErrReply(t, "You are not allowed to request private chat.")
- }
-
- // Client to Invite
- targetID := t.GetField(FieldUserID).Data
- newChatID := cc.Server.NewPrivateChat(cc)
-
- // Check if target user has "Refuse private chat" flag
- targetClient := cc.Server.Clients[[2]byte(targetID)]
- flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(targetClient.Flags[:])))
- if flagBitmap.Bit(UserFlagRefusePChat) == 1 {
- res = append(res,
- NewTransaction(
- TranServerMsg,
- cc.ID,
- NewField(FieldData, []byte(string(targetClient.UserName)+" does not accept private chats.")),
- NewField(FieldUserName, targetClient.UserName),
- NewField(FieldUserID, targetClient.ID[:]),
- NewField(FieldOptions, []byte{0, 2}),
- ),
- )
- } else {
- res = append(res,
- NewTransaction(
- TranInviteToChat,
- [2]byte(targetID),
- NewField(FieldChatID, newChatID[:]),
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- ),
- )
- }
-
- res = append(res,
- cc.NewReply(t,
- NewField(FieldChatID, newChatID[:]),
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- NewField(FieldUserIconID, cc.Icon),
- NewField(FieldUserFlags, cc.Flags[:]),
- ),
- )
-
- return res
-}
-
-func HandleInviteToChat(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessOpenChat) {
- return cc.NewErrReply(t, "You are not allowed to request private chat.")
- }
-
- // Client to Invite
- targetID := t.GetField(FieldUserID).Data
- chatID := t.GetField(FieldChatID).Data
-
- return []Transaction{
- NewTransaction(
- TranInviteToChat,
- [2]byte(targetID),
- NewField(FieldChatID, chatID),
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- ),
- cc.NewReply(
- t,
- NewField(FieldChatID, chatID),
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- NewField(FieldUserIconID, cc.Icon),
- NewField(FieldUserFlags, cc.Flags[:]),
- ),
- }
-}
-
-func HandleRejectChatInvite(cc *ClientConn, t *Transaction) (res []Transaction) {
- chatID := [4]byte(t.GetField(FieldChatID).Data)
- privChat := cc.Server.PrivateChats[chatID]
-
- for _, c := range privChat.ClientConn {
- res = append(res,
- NewTransaction(
- TranChatMsg,
- c.ID,
- NewField(FieldChatID, chatID[:]),
- NewField(FieldData, append(cc.UserName, []byte(" declined invitation to chat")...)),
- ),
- )
- }
-
- return res
-}
-
-// HandleJoinChat is sent from a v1.8+ Hotline client when the joins a private chat
-// Fields used in the reply:
-// * 115 Chat subject
-// * 300 User Name with info (Optional)
-// * 300 (more user names with info)
-func HandleJoinChat(cc *ClientConn, t *Transaction) (res []Transaction) {
- chatID := t.GetField(FieldChatID).Data
-
- privChat := cc.Server.PrivateChats[[4]byte(chatID)]
-
- // Send TranNotifyChatChangeUser to current members of the chat to inform of new user
- for _, c := range privChat.ClientConn {
- res = append(res,
- NewTransaction(
- TranNotifyChatChangeUser,
- c.ID,
- NewField(FieldChatID, chatID),
- NewField(FieldUserName, cc.UserName),
- NewField(FieldUserID, cc.ID[:]),
- NewField(FieldUserIconID, cc.Icon),
- NewField(FieldUserFlags, cc.Flags[:]),
- ),
- )
- }
-
- privChat.ClientConn[cc.ID] = cc
-
- replyFields := []Field{NewField(FieldChatSubject, []byte(privChat.Subject))}
- for _, c := range privChat.ClientConn {
- b, err := io.ReadAll(&User{
- ID: c.ID,
- Icon: c.Icon,
- Flags: c.Flags[:],
- Name: string(c.UserName),
- })
- if err != nil {
- return res
- }
- replyFields = append(replyFields, NewField(FieldUsernameWithInfo, b))
- }
-
- res = append(res, cc.NewReply(t, replyFields...))
- return res
-}
-
-// HandleLeaveChat is sent from a v1.8+ Hotline client when the user exits a private chat
-// Fields used in the request:
-// - 114 FieldChatID
-//
-// Reply is not expected.
-func HandleLeaveChat(cc *ClientConn, t *Transaction) (res []Transaction) {
- chatID := t.GetField(FieldChatID).Data
-
- privChat, ok := cc.Server.PrivateChats[[4]byte(chatID)]
- if !ok {
- return res
- }
-
- delete(privChat.ClientConn, cc.ID)
-
- // Notify members of the private chat that the user has left
- for _, c := range privChat.ClientConn {
- res = append(res,
- NewTransaction(
- TranNotifyChatDeleteUser,
- c.ID,
- NewField(FieldChatID, chatID),
- NewField(FieldUserID, cc.ID[:]),
- ),
- )
- }
-
- return res
-}
-
-// HandleSetChatSubject is sent from a v1.8+ Hotline client when the user sets a private chat subject
-// Fields used in the request:
-// * 114 Chat ID
-// * 115 Chat subject
-// Reply is not expected.
-func HandleSetChatSubject(cc *ClientConn, t *Transaction) (res []Transaction) {
- chatID := t.GetField(FieldChatID).Data
-
- privChat := cc.Server.PrivateChats[[4]byte(chatID)]
- privChat.Subject = string(t.GetField(FieldChatSubject).Data)
-
- for _, c := range privChat.ClientConn {
- res = append(res,
- NewTransaction(
- TranNotifyChatSubject,
- c.ID,
- NewField(FieldChatID, chatID),
- NewField(FieldChatSubject, t.GetField(FieldChatSubject).Data),
- ),
- )
- }
-
- return res
-}
-
-// HandleMakeAlias makes a file alias using the specified path.
-// Fields used in the request:
-// 201 File Name
-// 202 File path
-// 212 File new path Destination path
-//
-// Fields used in the reply:
-// None
-func HandleMakeAlias(cc *ClientConn, t *Transaction) (res []Transaction) {
- if !cc.Authorize(accessMakeAlias) {
- return cc.NewErrReply(t, "You are not allowed to make aliases.")
- }
- fileName := t.GetField(FieldFileName).Data
- filePath := t.GetField(FieldFilePath).Data
- fileNewPath := t.GetField(FieldFileNewPath).Data
-
- fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
- if err != nil {
- return res
- }
-
- fullNewFilePath, err := readPath(cc.Server.Config.FileRoot, fileNewPath, fileName)
- if err != nil {
- return res
- }
-
- cc.logger.Debug("Make alias", "src", fullFilePath, "dst", fullNewFilePath)
-
- if err := cc.Server.FS.Symlink(fullFilePath, fullNewFilePath); err != nil {
- return cc.NewErrReply(t, "Error creating alias")
- }
-
- res = append(res, cc.NewReply(t))
- return res
-}
-
-// HandleDownloadBanner handles requests for a new banner from the server
-// Fields used in the request:
-// None
-// Fields used in the reply:
-// 107 FieldRefNum Used later for transfer
-// 108 FieldTransferSize Size of data to be downloaded
-func HandleDownloadBanner(cc *ClientConn, t *Transaction) (res []Transaction) {
- ft := cc.newFileTransfer(bannerDownload, []byte{}, []byte{}, make([]byte, 4))
- binary.BigEndian.PutUint32(ft.TransferSize, uint32(len(cc.Server.banner)))
-
- return append(res, cc.NewReply(t,
- NewField(FieldRefNum, ft.refNum[:]),
- NewField(FieldTransferSize, ft.TransferSize),
- ))
-}
+// The total size of a chat message data field is 8192 bytes.
+const LimitChatMsg = 8192
git.r.bdr.sh / rbdr / mobius / blobdiff