]> git.r.bdr.sh - rbdr/mobius/blobdiff - hotline/transaction_handlers.go
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Make keepalive interval a const
[rbdr/mobius] / hotline / transaction_handlers.go
diff --git a/hotline/transaction_handlers.go b/hotline/transaction_handlers.go
index 4866beec065b14e13af3f74784aa25ed203a48df..813d25c072185ab9f80f32915a702d28a7777da5 100644 (file)
--- a/hotline/transaction_handlers.go
+++ b/hotline/transaction_handlers.go
@@ -6,7 +6,6 @@ import (
        "errors"
        "fmt"
        "gopkg.in/yaml.v3"
        "errors"
        "fmt"
        "gopkg.in/yaml.v3"
-       "io/ioutil"
        "math/big"
        "os"
        "path"
        "math/big"
        "os"
        "path"
@@ -16,223 +15,225 @@ import (
        "time"
 )
 
        "time"
 )
 
+type HandlerFunc func(*ClientConn, *Transaction) ([]Transaction, error)
+
 type TransactionType struct {
 type TransactionType struct {
-       Handler        func(*ClientConn, *Transaction) ([]Transaction, error) // function for handling the transaction type
-       Name           string                                                 // Name of transaction as it will appear in logging
+       Handler        HandlerFunc // function for handling the transaction type
+       Name           string      // Name of transaction as it will appear in logging
        RequiredFields []requiredField
 }
 
 var TransactionHandlers = map[uint16]TransactionType{
        // Server initiated
        RequiredFields []requiredField
 }
 
 var TransactionHandlers = map[uint16]TransactionType{
        // Server initiated
-       tranChatMsg: {
-               Name: "tranChatMsg",
+       TranChatMsg: {
+               Name: "TranChatMsg",
        },
        // Server initiated
        },
        // Server initiated
-       tranNotifyChangeUser: {
-               Name: "tranNotifyChangeUser",
+       TranNotifyChangeUser: {
+               Name: "TranNotifyChangeUser",
        },
        },
-       tranError: {
-               Name: "tranError",
+       TranError: {
+               Name: "TranError",
        },
        },
-       tranShowAgreement: {
-               Name: "tranShowAgreement",
+       TranShowAgreement: {
+               Name: "TranShowAgreement",
        },
        },
-       tranUserAccess: {
-               Name: "tranUserAccess",
+       TranUserAccess: {
+               Name: "TranUserAccess",
        },
        },
-       tranNotifyDeleteUser: {
-               Name: "tranNotifyDeleteUser",
+       TranNotifyDeleteUser: {
+               Name: "TranNotifyDeleteUser",
        },
        },
-       tranAgreed: {
-               Name:    "tranAgreed",
+       TranAgreed: {
+               Name:    "TranAgreed",
                Handler: HandleTranAgreed,
        },
                Handler: HandleTranAgreed,
        },
-       tranChatSend: {
-               Name:    "tranChatSend",
+       TranChatSend: {
+               Name:    "TranChatSend",
                Handler: HandleChatSend,
                RequiredFields: []requiredField{
                        {
                Handler: HandleChatSend,
                RequiredFields: []requiredField{
                        {
-                               ID:     fieldData,
+                               ID:     FieldData,
                                minLen: 0,
                        },
                },
        },
                                minLen: 0,
                        },
                },
        },
-       tranDelNewsArt: {
-               Name:    "tranDelNewsArt",
+       TranDelNewsArt: {
+               Name:    "TranDelNewsArt",
                Handler: HandleDelNewsArt,
        },
                Handler: HandleDelNewsArt,
        },
-       tranDelNewsItem: {
-               Name:    "tranDelNewsItem",
+       TranDelNewsItem: {
+               Name:    "TranDelNewsItem",
                Handler: HandleDelNewsItem,
        },
                Handler: HandleDelNewsItem,
        },
-       tranDeleteFile: {
-               Name:    "tranDeleteFile",
+       TranDeleteFile: {
+               Name:    "TranDeleteFile",
                Handler: HandleDeleteFile,
        },
                Handler: HandleDeleteFile,
        },
-       tranDeleteUser: {
-               Name:    "tranDeleteUser",
+       TranDeleteUser: {
+               Name:    "TranDeleteUser",
                Handler: HandleDeleteUser,
        },
                Handler: HandleDeleteUser,
        },
-       tranDisconnectUser: {
-               Name:    "tranDisconnectUser",
+       TranDisconnectUser: {
+               Name:    "TranDisconnectUser",
                Handler: HandleDisconnectUser,
        },
                Handler: HandleDisconnectUser,
        },
-       tranDownloadFile: {
-               Name:    "tranDownloadFile",
+       TranDownloadFile: {
+               Name:    "TranDownloadFile",
                Handler: HandleDownloadFile,
        },
                Handler: HandleDownloadFile,
        },
-       tranDownloadFldr: {
-               Name:    "tranDownloadFldr",
+       TranDownloadFldr: {
+               Name:    "TranDownloadFldr",
                Handler: HandleDownloadFolder,
        },
                Handler: HandleDownloadFolder,
        },
-       tranGetClientInfoText: {
-               Name:    "tranGetClientInfoText",
+       TranGetClientInfoText: {
+               Name:    "TranGetClientInfoText",
                Handler: HandleGetClientInfoText,
        },
                Handler: HandleGetClientInfoText,
        },
-       tranGetFileInfo: {
-               Name:    "tranGetFileInfo",
+       TranGetFileInfo: {
+               Name:    "TranGetFileInfo",
                Handler: HandleGetFileInfo,
        },
                Handler: HandleGetFileInfo,
        },
-       tranGetFileNameList: {
-               Name:    "tranGetFileNameList",
+       TranGetFileNameList: {
+               Name:    "TranGetFileNameList",
                Handler: HandleGetFileNameList,
        },
                Handler: HandleGetFileNameList,
        },
-       tranGetMsgs: {
-               Name:    "tranGetMsgs",
+       TranGetMsgs: {
+               Name:    "TranGetMsgs",
                Handler: HandleGetMsgs,
        },
                Handler: HandleGetMsgs,
        },
-       tranGetNewsArtData: {
-               Name:    "tranGetNewsArtData",
+       TranGetNewsArtData: {
+               Name:    "TranGetNewsArtData",
                Handler: HandleGetNewsArtData,
        },
                Handler: HandleGetNewsArtData,
        },
-       tranGetNewsArtNameList: {
-               Name:    "tranGetNewsArtNameList",
+       TranGetNewsArtNameList: {
+               Name:    "TranGetNewsArtNameList",
                Handler: HandleGetNewsArtNameList,
        },
                Handler: HandleGetNewsArtNameList,
        },
-       tranGetNewsCatNameList: {
-               Name:    "tranGetNewsCatNameList",
+       TranGetNewsCatNameList: {
+               Name:    "TranGetNewsCatNameList",
                Handler: HandleGetNewsCatNameList,
        },
                Handler: HandleGetNewsCatNameList,
        },
-       tranGetUser: {
-               Name:    "tranGetUser",
+       TranGetUser: {
+               Name:    "TranGetUser",
                Handler: HandleGetUser,
        },
                Handler: HandleGetUser,
        },
-       tranGetUserNameList: {
+       TranGetUserNameList: {
                Name:    "tranHandleGetUserNameList",
                Handler: HandleGetUserNameList,
        },
                Name:    "tranHandleGetUserNameList",
                Handler: HandleGetUserNameList,
        },
-       tranInviteNewChat: {
-               Name:    "tranInviteNewChat",
+       TranInviteNewChat: {
+               Name:    "TranInviteNewChat",
                Handler: HandleInviteNewChat,
        },
                Handler: HandleInviteNewChat,
        },
-       tranInviteToChat: {
-               Name:    "tranInviteToChat",
+       TranInviteToChat: {
+               Name:    "TranInviteToChat",
                Handler: HandleInviteToChat,
        },
                Handler: HandleInviteToChat,
        },
-       tranJoinChat: {
-               Name:    "tranJoinChat",
+       TranJoinChat: {
+               Name:    "TranJoinChat",
                Handler: HandleJoinChat,
        },
                Handler: HandleJoinChat,
        },
-       tranKeepAlive: {
-               Name:    "tranKeepAlive",
+       TranKeepAlive: {
+               Name:    "TranKeepAlive",
                Handler: HandleKeepAlive,
        },
                Handler: HandleKeepAlive,
        },
-       tranLeaveChat: {
-               Name:    "tranJoinChat",
+       TranLeaveChat: {
+               Name:    "TranJoinChat",
                Handler: HandleLeaveChat,
        },
                Handler: HandleLeaveChat,
        },
-       tranListUsers: {
-               Name:    "tranListUsers",
+       TranListUsers: {
+               Name:    "TranListUsers",
                Handler: HandleListUsers,
        },
                Handler: HandleListUsers,
        },
-       tranMoveFile: {
-               Name:    "tranMoveFile",
+       TranMoveFile: {
+               Name:    "TranMoveFile",
                Handler: HandleMoveFile,
        },
                Handler: HandleMoveFile,
        },
-       tranNewFolder: {
-               Name:    "tranNewFolder",
+       TranNewFolder: {
+               Name:    "TranNewFolder",
                Handler: HandleNewFolder,
        },
                Handler: HandleNewFolder,
        },
-       tranNewNewsCat: {
-               Name:    "tranNewNewsCat",
+       TranNewNewsCat: {
+               Name:    "TranNewNewsCat",
                Handler: HandleNewNewsCat,
        },
                Handler: HandleNewNewsCat,
        },
-       tranNewNewsFldr: {
-               Name:    "tranNewNewsFldr",
+       TranNewNewsFldr: {
+               Name:    "TranNewNewsFldr",
                Handler: HandleNewNewsFldr,
        },
                Handler: HandleNewNewsFldr,
        },
-       tranNewUser: {
-               Name:    "tranNewUser",
+       TranNewUser: {
+               Name:    "TranNewUser",
                Handler: HandleNewUser,
        },
                Handler: HandleNewUser,
        },
-       tranUpdateUser: {
-               Name:    "tranUpdateUser",
+       TranUpdateUser: {
+               Name:    "TranUpdateUser",
                Handler: HandleUpdateUser,
        },
                Handler: HandleUpdateUser,
        },
-       tranOldPostNews: {
-               Name:    "tranOldPostNews",
+       TranOldPostNews: {
+               Name:    "TranOldPostNews",
                Handler: HandleTranOldPostNews,
        },
                Handler: HandleTranOldPostNews,
        },
-       tranPostNewsArt: {
-               Name:    "tranPostNewsArt",
+       TranPostNewsArt: {
+               Name:    "TranPostNewsArt",
                Handler: HandlePostNewsArt,
        },
                Handler: HandlePostNewsArt,
        },
-       tranRejectChatInvite: {
-               Name:    "tranRejectChatInvite",
+       TranRejectChatInvite: {
+               Name:    "TranRejectChatInvite",
                Handler: HandleRejectChatInvite,
        },
                Handler: HandleRejectChatInvite,
        },
-       tranSendInstantMsg: {
-               Name:    "tranSendInstantMsg",
+       TranSendInstantMsg: {
+               Name:    "TranSendInstantMsg",
                Handler: HandleSendInstantMsg,
                RequiredFields: []requiredField{
                        {
                Handler: HandleSendInstantMsg,
                RequiredFields: []requiredField{
                        {
-                               ID:     fieldData,
+                               ID:     FieldData,
                                minLen: 0,
                        },
                        {
                                minLen: 0,
                        },
                        {
-                               ID: fieldUserID,
+                               ID: FieldUserID,
                        },
                },
        },
                        },
                },
        },
-       tranSetChatSubject: {
-               Name:    "tranSetChatSubject",
+       TranSetChatSubject: {
+               Name:    "TranSetChatSubject",
                Handler: HandleSetChatSubject,
        },
                Handler: HandleSetChatSubject,
        },
-       tranMakeFileAlias: {
-               Name:    "tranMakeFileAlias",
+       TranMakeFileAlias: {
+               Name:    "TranMakeFileAlias",
                Handler: HandleMakeAlias,
                RequiredFields: []requiredField{
                Handler: HandleMakeAlias,
                RequiredFields: []requiredField{
-                       {ID: fieldFileName, minLen: 1},
-                       {ID: fieldFilePath, minLen: 1},
-                       {ID: fieldFileNewPath, minLen: 1},
+                       {ID: FieldFileName, minLen: 1},
+                       {ID: FieldFilePath, minLen: 1},
+                       {ID: FieldFileNewPath, minLen: 1},
                },
        },
                },
        },
-       tranSetClientUserInfo: {
-               Name:    "tranSetClientUserInfo",
+       TranSetClientUserInfo: {
+               Name:    "TranSetClientUserInfo",
                Handler: HandleSetClientUserInfo,
        },
                Handler: HandleSetClientUserInfo,
        },
-       tranSetFileInfo: {
-               Name:    "tranSetFileInfo",
+       TranSetFileInfo: {
+               Name:    "TranSetFileInfo",
                Handler: HandleSetFileInfo,
        },
                Handler: HandleSetFileInfo,
        },
-       tranSetUser: {
-               Name:    "tranSetUser",
+       TranSetUser: {
+               Name:    "TranSetUser",
                Handler: HandleSetUser,
        },
                Handler: HandleSetUser,
        },
-       tranUploadFile: {
-               Name:    "tranUploadFile",
+       TranUploadFile: {
+               Name:    "TranUploadFile",
                Handler: HandleUploadFile,
        },
                Handler: HandleUploadFile,
        },
-       tranUploadFldr: {
-               Name:    "tranUploadFldr",
+       TranUploadFldr: {
+               Name:    "TranUploadFldr",
                Handler: HandleUploadFolder,
        },
                Handler: HandleUploadFolder,
        },
-       tranUserBroadcast: {
-               Name:    "tranUserBroadcast",
+       TranUserBroadcast: {
+               Name:    "TranUserBroadcast",
                Handler: HandleUserBroadcast,
        },
                Handler: HandleUserBroadcast,
        },
-       tranDownloadBanner: {
-               Name:    "tranDownloadBanner",
+       TranDownloadBanner: {
+               Name:    "TranDownloadBanner",
                Handler: HandleDownloadBanner,
        },
 }
                Handler: HandleDownloadBanner,
        },
 }
@@ -245,18 +246,20 @@ func HandleChatSend(cc *ClientConn, t *Transaction) (res []Transaction, err erro
 
        // Truncate long usernames
        trunc := fmt.Sprintf("%13s", cc.UserName)
 
        // Truncate long usernames
        trunc := fmt.Sprintf("%13s", cc.UserName)
-       formattedMsg := fmt.Sprintf("\r%.14s:  %s", trunc, t.GetField(fieldData).Data)
+       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
 
        // 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 in the transaction payload
-       if t.GetField(fieldChatOptions).Data != nil {
-               formattedMsg = fmt.Sprintf("\r*** %s %s", cc.UserName, t.GetField(fieldData).Data)
+       // 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)
        }
 
        }
 
-       chatID := t.GetField(fieldChatID).Data
-       // a non-nil chatID indicates the message belongs to a private chat
-       if chatID != nil {
+       // 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) {
                chatInt := binary.BigEndian.Uint32(chatID)
                privChat := cc.Server.PrivateChats[chatInt]
 
                chatInt := binary.BigEndian.Uint32(chatID)
                privChat := cc.Server.PrivateChats[chatInt]
 
@@ -265,10 +268,10 @@ func HandleChatSend(cc *ClientConn, t *Transaction) (res []Transaction, err erro
                // send the message to all connected clients of the private chat
                for _, c := range clients {
                        res = append(res, *NewTransaction(
                // send the message to all connected clients of the private chat
                for _, c := range clients {
                        res = append(res, *NewTransaction(
-                               tranChatMsg,
+                               TranChatMsg,
                                c.ID,
                                c.ID,
-                               NewField(fieldChatID, chatID),
-                               NewField(fieldData, []byte(formattedMsg)),
+                               NewField(FieldChatID, chatID),
+                               NewField(FieldData, []byte(formattedMsg)),
                        ))
                }
                return res, err
                        ))
                }
                return res, err
@@ -277,7 +280,7 @@ func HandleChatSend(cc *ClientConn, t *Transaction) (res []Transaction, err erro
        for _, c := range sortedClients(cc.Server.Clients) {
                // Filter out clients that do not have the read chat permission
                if c.Authorize(accessReadChat) {
        for _, c := range sortedClients(cc.Server.Clients) {
                // Filter out clients that do not have the read chat permission
                if c.Authorize(accessReadChat) {
-                       res = append(res, *NewTransaction(tranChatMsg, c.ID, NewField(fieldData, []byte(formattedMsg))))
+                       res = append(res, *NewTransaction(TranChatMsg, c.ID, NewField(FieldData, []byte(formattedMsg))))
                }
        }
 
                }
        }
 
@@ -286,6 +289,7 @@ func HandleChatSend(cc *ClientConn, t *Transaction) (res []Transaction, err erro
 
 // HandleSendInstantMsg sends instant message to the user on the current server.
 // Fields used in the request:
 
 // 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:
 //     103     User ID
 //     113     Options
 //             One of the following values:
@@ -304,42 +308,57 @@ func HandleSendInstantMsg(cc *ClientConn, t *Transaction) (res []Transaction, er
                return res, err
        }
 
                return res, err
        }
 
-       msg := t.GetField(fieldData)
-       ID := t.GetField(fieldUserID)
+       msg := t.GetField(FieldData)
+       ID := t.GetField(FieldUserID)
 
        reply := NewTransaction(
 
        reply := NewTransaction(
-               tranServerMsg,
+               TranServerMsg,
                &ID.Data,
                &ID.Data,
-               NewField(fieldData, msg.Data),
-               NewField(fieldUserName, cc.UserName),
-               NewField(fieldUserID, *cc.ID),
-               NewField(fieldOptions, []byte{0, 1}),
+               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
+       // 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
        //  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))
+       if t.GetField(FieldQuotingMsg).Data != nil {
+               reply.Fields = append(reply.Fields, NewField(FieldQuotingMsg, t.GetField(FieldQuotingMsg).Data))
        }
 
        }
 
-       res = append(res, *reply)
-
        id, _ := byteToInt(ID.Data)
        otherClient, ok := cc.Server.Clients[uint16(id)]
        if !ok {
                return res, errors.New("invalid client ID")
        }
 
        id, _ := byteToInt(ID.Data)
        otherClient, ok := cc.Server.Clients[uint16(id)]
        if !ok {
                return res, errors.New("invalid client ID")
        }
 
+       // Check if target user has "Refuse private messages" flag
+       flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(otherClient.Flags)))
+       if flagBitmap.Bit(userFLagRefusePChat) == 1 {
+               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(
        // Respond with auto reply if other client has it enabled
        if len(otherClient.AutoReply) > 0 {
                res = append(res,
                        *NewTransaction(
-                               tranServerMsg,
+                               TranServerMsg,
                                cc.ID,
                                cc.ID,
-                               NewField(fieldData, otherClient.AutoReply),
-                               NewField(fieldUserName, otherClient.UserName),
-                               NewField(fieldUserID, *otherClient.ID),
-                               NewField(fieldOptions, []byte{0, 1}),
+                               NewField(FieldData, otherClient.AutoReply),
+                               NewField(FieldUserName, otherClient.UserName),
+                               NewField(FieldUserID, *otherClient.ID),
+                               NewField(FieldOptions, []byte{0, 1}),
                        ),
                )
        }
                        ),
                )
        }
@@ -350,8 +369,8 @@ func HandleSendInstantMsg(cc *ClientConn, t *Transaction) (res []Transaction, er
 }
 
 func HandleGetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 }
 
 func HandleGetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       fileName := t.GetField(fieldFileName).Data
-       filePath := t.GetField(fieldFilePath).Data
+       fileName := t.GetField(FieldFileName).Data
+       filePath := t.GetField(FieldFilePath).Data
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
@@ -364,14 +383,14 @@ func HandleGetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
        }
 
        res = append(res, cc.NewReply(t,
        }
 
        res = append(res, cc.NewReply(t,
-               NewField(fieldFileName, []byte(fw.name)),
-               NewField(fieldFileTypeString, fw.ffo.FlatFileInformationFork.friendlyType()),
-               NewField(fieldFileCreatorString, fw.ffo.FlatFileInformationFork.friendlyCreator()),
-               NewField(fieldFileComment, fw.ffo.FlatFileInformationFork.Comment),
-               NewField(fieldFileType, fw.ffo.FlatFileInformationFork.TypeSignature),
-               NewField(fieldFileCreateDate, fw.ffo.FlatFileInformationFork.CreateDate),
-               NewField(fieldFileModifyDate, fw.ffo.FlatFileInformationFork.ModifyDate),
-               NewField(fieldFileSize, fw.totalSize()),
+               NewField(FieldFileName, []byte(fw.name)),
+               NewField(FieldFileTypeString, fw.ffo.FlatFileInformationFork.friendlyType()),
+               NewField(FieldFileCreatorString, fw.ffo.FlatFileInformationFork.friendlyCreator()),
+               NewField(FieldFileComment, fw.ffo.FlatFileInformationFork.Comment),
+               NewField(FieldFileType, fw.ffo.FlatFileInformationFork.TypeSignature),
+               NewField(FieldFileCreateDate, fw.ffo.FlatFileInformationFork.CreateDate),
+               NewField(FieldFileModifyDate, fw.ffo.FlatFileInformationFork.ModifyDate),
+               NewField(FieldFileSize, fw.totalSize()),
        ))
        return res, err
 }
        ))
        return res, err
 }
@@ -384,8 +403,8 @@ func HandleGetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
 // * 210       File comment    Optional
 // Fields used in the reply:   None
 func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 // * 210       File comment    Optional
 // Fields used in the reply:   None
 func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       fileName := t.GetField(fieldFileName).Data
-       filePath := t.GetField(fieldFilePath).Data
+       fileName := t.GetField(FieldFileName).Data
+       filePath := t.GetField(FieldFilePath).Data
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
@@ -401,7 +420,7 @@ func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
        if err != nil {
                return res, err
        }
        if err != nil {
                return res, err
        }
-       if t.GetField(fieldFileComment).Data != nil {
+       if t.GetField(FieldFileComment).Data != nil {
                switch mode := fi.Mode(); {
                case mode.IsDir():
                        if !cc.Authorize(accessSetFolderComment) {
                switch mode := fi.Mode(); {
                case mode.IsDir():
                        if !cc.Authorize(accessSetFolderComment) {
@@ -415,7 +434,7 @@ func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
                        }
                }
 
                        }
                }
 
-               if err := hlFile.ffo.FlatFileInformationFork.setComment(t.GetField(fieldFileComment).Data); err != nil {
+               if err := hlFile.ffo.FlatFileInformationFork.setComment(t.GetField(FieldFileComment).Data); err != nil {
                        return res, err
                }
                w, err := hlFile.infoForkWriter()
                        return res, err
                }
                w, err := hlFile.infoForkWriter()
@@ -428,12 +447,12 @@ func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
                }
        }
 
                }
        }
 
-       fullNewFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, t.GetField(fieldFileNewName).Data)
+       fullNewFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, t.GetField(FieldFileNewName).Data)
        if err != nil {
                return nil, err
        }
 
        if err != nil {
                return nil, err
        }
 
-       fileNewName := t.GetField(fieldFileNewName).Data
+       fileNewName := t.GetField(FieldFileNewName).Data
 
        if fileNewName != nil {
                switch mode := fi.Mode(); {
 
        if fileNewName != nil {
                switch mode := fi.Mode(); {
@@ -463,7 +482,7 @@ func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
                                return res, err
                        }
                        if err != nil {
                                return res, err
                        }
                        if err != nil {
-                               panic(err)
+                               return res, err
                        }
                }
        }
                        }
                }
        }
@@ -478,8 +497,8 @@ func HandleSetFileInfo(cc *ClientConn, t *Transaction) (res []Transaction, err e
 // * 202       File path
 // Fields used in the reply: none
 func HandleDeleteFile(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 // * 202       File path
 // Fields used in the reply: none
 func HandleDeleteFile(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       fileName := t.GetField(fieldFileName).Data
-       filePath := t.GetField(fieldFilePath).Data
+       fileName := t.GetField(FieldFileName).Data
+       filePath := t.GetField(FieldFilePath).Data
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
@@ -520,14 +539,14 @@ func HandleDeleteFile(cc *ClientConn, t *Transaction) (res []Transaction, err er
 
 // HandleMoveFile moves files or folders. Note: seemingly not documented
 func HandleMoveFile(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 
 // HandleMoveFile moves files or folders. Note: seemingly not documented
 func HandleMoveFile(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       fileName := string(t.GetField(fieldFileName).Data)
+       fileName := string(t.GetField(FieldFileName).Data)
 
 
-       filePath, err := readPath(cc.Server.Config.FileRoot, t.GetField(fieldFilePath).Data, t.GetField(fieldFileName).Data)
+       filePath, err := readPath(cc.Server.Config.FileRoot, t.GetField(FieldFilePath).Data, t.GetField(FieldFileName).Data)
        if err != nil {
                return res, err
        }
 
        if err != nil {
                return res, err
        }
 
-       fileNewPath, err := readPath(cc.Server.Config.FileRoot, t.GetField(fieldFileNewPath).Data, nil)
+       fileNewPath, err := readPath(cc.Server.Config.FileRoot, t.GetField(FieldFileNewPath).Data, nil)
        if err != nil {
                return res, err
        }
        if err != nil {
                return res, err
        }
@@ -573,16 +592,16 @@ func HandleNewFolder(cc *ClientConn, t *Transaction) (res []Transaction, err err
                res = append(res, cc.NewErrReply(t, "You are not allowed to create folders."))
                return res, err
        }
                res = append(res, cc.NewErrReply(t, "You are not allowed to create folders."))
                return res, err
        }
-       folderName := string(t.GetField(fieldFileName).Data)
+       folderName := string(t.GetField(FieldFileName).Data)
 
        folderName = path.Join("/", folderName)
 
        var subPath string
 
 
        folderName = path.Join("/", folderName)
 
        var subPath string
 
-       // fieldFilePath is only present for nested paths
-       if t.GetField(fieldFilePath).Data != nil {
+       // FieldFilePath is only present for nested paths
+       if t.GetField(FieldFilePath).Data != nil {
                var newFp FilePath
                var newFp FilePath
-               _, err := newFp.Write(t.GetField(fieldFilePath).Data)
+               _, err := newFp.Write(t.GetField(FieldFilePath).Data)
                if err != nil {
                        return nil, err
                }
                if err != nil {
                        return nil, err
                }
@@ -617,22 +636,22 @@ func HandleSetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
                return res, err
        }
 
                return res, err
        }
 
-       login := DecodeUserString(t.GetField(fieldUserLogin).Data)
-       userName := string(t.GetField(fieldUserName).Data)
+       login := DecodeUserString(t.GetField(FieldUserLogin).Data)
+       userName := string(t.GetField(FieldUserName).Data)
 
 
-       newAccessLvl := t.GetField(fieldUserAccess).Data
+       newAccessLvl := t.GetField(FieldUserAccess).Data
 
        account := cc.Server.Accounts[login]
        account.Name = userName
        copy(account.Access[:], newAccessLvl)
 
        // If the password field is cleared in the Hotline edit user UI, the SetUser transaction does
 
        account := cc.Server.Accounts[login]
        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 {
+       // not include FieldUserPassword
+       if t.GetField(FieldUserPassword).Data == nil {
                account.Password = hashAndSalt([]byte(""))
        }
                account.Password = hashAndSalt([]byte(""))
        }
-       if len(t.GetField(fieldUserPassword).Data) > 1 {
-               account.Password = hashAndSalt(t.GetField(fieldUserPassword).Data)
+       if len(t.GetField(FieldUserPassword).Data) > 1 {
+               account.Password = hashAndSalt(t.GetField(FieldUserPassword).Data)
        }
 
        out, err := yaml.Marshal(&account)
        }
 
        out, err := yaml.Marshal(&account)
@@ -647,7 +666,7 @@ func HandleSetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
        for _, c := range cc.Server.Clients {
                if c.Account.Login == login {
                        // Note: comment out these two lines to test server-side deny messages
        for _, c := range cc.Server.Clients {
                if c.Account.Login == login {
                        // Note: comment out these two lines to test server-side deny messages
-                       newT := NewTransaction(tranUserAccess, c.ID, NewField(fieldUserAccess, newAccessLvl))
+                       newT := NewTransaction(TranUserAccess, c.ID, NewField(FieldUserAccess, newAccessLvl))
                        res = append(res, *newT)
 
                        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(c.Flags)))
                        res = append(res, *newT)
 
                        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(c.Flags)))
@@ -661,11 +680,11 @@ func HandleSetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
                        c.Account.Access = account.Access
 
                        cc.sendAll(
                        c.Account.Access = account.Access
 
                        cc.sendAll(
-                               tranNotifyChangeUser,
-                               NewField(fieldUserID, *c.ID),
-                               NewField(fieldUserFlags, c.Flags),
-                               NewField(fieldUserName, c.UserName),
-                               NewField(fieldUserIconID, c.Icon),
+                               TranNotifyChangeUser,
+                               NewField(FieldUserID, *c.ID),
+                               NewField(FieldUserFlags, c.Flags),
+                               NewField(FieldUserName, c.UserName),
+                               NewField(FieldUserIconID, c.Icon),
                        )
                }
        }
                        )
                }
        }
@@ -680,17 +699,17 @@ func HandleGetUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
                return res, err
        }
 
                return res, err
        }
 
-       account := cc.Server.Accounts[string(t.GetField(fieldUserLogin).Data)]
+       account := cc.Server.Accounts[string(t.GetField(FieldUserLogin).Data)]
        if account == nil {
                res = append(res, cc.NewErrReply(t, "Account does not exist."))
                return res, err
        }
 
        res = append(res, cc.NewReply(t,
        if account == nil {
                res = append(res, cc.NewErrReply(t, "Account does not exist."))
                return res, err
        }
 
        res = append(res, cc.NewReply(t,
-               NewField(fieldUserName, []byte(account.Name)),
-               NewField(fieldUserLogin, negateString(t.GetField(fieldUserLogin).Data)),
-               NewField(fieldUserPassword, []byte(account.Password)),
-               NewField(fieldUserAccess, account.Access[:]),
+               NewField(FieldUserName, []byte(account.Name)),
+               NewField(FieldUserLogin, negateString(t.GetField(FieldUserLogin).Data)),
+               NewField(FieldUserPassword, []byte(account.Password)),
+               NewField(FieldUserAccess, account.Access[:]),
        ))
        return res, err
 }
        ))
        return res, err
 }
@@ -709,7 +728,7 @@ func HandleListUsers(cc *ClientConn, t *Transaction) (res []Transaction, err err
                        return res, err
                }
 
                        return res, err
                }
 
-               userFields = append(userFields, NewField(fieldData, b[:n]))
+               userFields = append(userFields, NewField(FieldData, b[:n]))
        }
 
        res = append(res, cc.NewReply(t, userFields...))
        }
 
        res = append(res, cc.NewReply(t, userFields...))
@@ -733,7 +752,7 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                }
 
                if len(subFields) == 1 {
                }
 
                if len(subFields) == 1 {
-                       login := DecodeUserString(getField(fieldData, &subFields).Data)
+                       login := DecodeUserString(getField(FieldData, &subFields).Data)
                        cc.logger.Infow("DeleteUser", "login", login)
 
                        if !cc.Authorize(accessDeleteUser) {
                        cc.logger.Infow("DeleteUser", "login", login)
 
                        if !cc.Authorize(accessDeleteUser) {
@@ -747,7 +766,7 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                        continue
                }
 
                        continue
                }
 
-               login := DecodeUserString(getField(fieldUserLogin, &subFields).Data)
+               login := DecodeUserString(getField(FieldUserLogin, &subFields).Data)
 
                // check if the login dataFile; if so, we know we are updating an existing user
                if acc, ok := cc.Server.Accounts[login]; ok {
 
                // check if the login dataFile; if so, we know we are updating an existing user
                if acc, ok := cc.Server.Accounts[login]; ok {
@@ -759,21 +778,21 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                                return res, err
                        }
 
                                return res, err
                        }
 
-                       if getField(fieldUserPassword, &subFields) != nil {
-                               newPass := getField(fieldUserPassword, &subFields).Data
+                       if getField(FieldUserPassword, &subFields) != nil {
+                               newPass := getField(FieldUserPassword, &subFields).Data
                                acc.Password = hashAndSalt(newPass)
                        } else {
                                acc.Password = hashAndSalt([]byte(""))
                        }
 
                                acc.Password = hashAndSalt(newPass)
                        } else {
                                acc.Password = hashAndSalt([]byte(""))
                        }
 
-                       if getField(fieldUserAccess, &subFields) != nil {
-                               copy(acc.Access[:], getField(fieldUserAccess, &subFields).Data)
+                       if getField(FieldUserAccess, &subFields) != nil {
+                               copy(acc.Access[:], getField(FieldUserAccess, &subFields).Data)
                        }
 
                        err = cc.Server.UpdateUser(
                        }
 
                        err = cc.Server.UpdateUser(
-                               DecodeUserString(getField(fieldData, &subFields).Data),
-                               DecodeUserString(getField(fieldUserLogin, &subFields).Data),
-                               string(getField(fieldUserName, &subFields).Data),
+                               DecodeUserString(getField(FieldData, &subFields).Data),
+                               DecodeUserString(getField(FieldUserLogin, &subFields).Data),
+                               string(getField(FieldUserName, &subFields).Data),
                                acc.Password,
                                acc.Access,
                        )
                                acc.Password,
                                acc.Access,
                        )
@@ -789,9 +808,18 @@ func HandleUpdateUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
                        }
 
                        newAccess := accessBitmap{}
                        }
 
                        newAccess := accessBitmap{}
-                       copy(newAccess[:], getField(fieldUserAccess, &subFields).Data[:])
+                       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 append(res, cc.NewErrReply(t, "Cannot create account with more access than yourself.")), err
+                                       }
+                               }
+                       }
 
 
-                       err := cc.Server.NewUser(login, string(getField(fieldUserName, &subFields).Data), string(getField(fieldUserPassword, &subFields).Data), newAccess)
+                       err := cc.Server.NewUser(login, string(getField(FieldUserName, &subFields).Data), string(getField(FieldUserPassword, &subFields).Data), newAccess)
                        if err != nil {
                                return []Transaction{}, err
                        }
                        if err != nil {
                                return []Transaction{}, err
                        }
@@ -809,7 +837,7 @@ func HandleNewUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
                return res, err
        }
 
                return res, err
        }
 
-       login := DecodeUserString(t.GetField(fieldUserLogin).Data)
+       login := DecodeUserString(t.GetField(FieldUserLogin).Data)
 
        // If the account already dataFile, reply with an error
        if _, ok := cc.Server.Accounts[login]; ok {
 
        // If the account already dataFile, reply with an error
        if _, ok := cc.Server.Accounts[login]; ok {
@@ -818,9 +846,19 @@ func HandleNewUser(cc *ClientConn, t *Transaction) (res []Transaction, err error
        }
 
        newAccess := accessBitmap{}
        }
 
        newAccess := accessBitmap{}
-       copy(newAccess[:], t.GetField(fieldUserAccess).Data[:])
+       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) {
+                               res = append(res, cc.NewErrReply(t, "Cannot create account with more access than yourself."))
+                               return res, err
+                       }
+               }
+       }
 
 
-       if err := cc.Server.NewUser(login, string(t.GetField(fieldUserName).Data), string(t.GetField(fieldUserPassword).Data), newAccess); err != nil {
+       if err := cc.Server.NewUser(login, string(t.GetField(FieldUserName).Data), string(t.GetField(FieldUserPassword).Data), newAccess); err != nil {
                return []Transaction{}, err
        }
 
                return []Transaction{}, err
        }
 
@@ -835,7 +873,7 @@ func HandleDeleteUser(cc *ClientConn, t *Transaction) (res []Transaction, err er
        }
 
        // TODO: Handle case where account doesn't exist; e.g. delete race condition
        }
 
        // TODO: Handle case where account doesn't exist; e.g. delete race condition
-       login := DecodeUserString(t.GetField(fieldUserLogin).Data)
+       login := DecodeUserString(t.GetField(FieldUserLogin).Data)
 
        if err := cc.Server.DeleteUser(login); err != nil {
                return res, err
 
        if err := cc.Server.DeleteUser(login); err != nil {
                return res, err
@@ -853,26 +891,15 @@ func HandleUserBroadcast(cc *ClientConn, t *Transaction) (res []Transaction, err
        }
 
        cc.sendAll(
        }
 
        cc.sendAll(
-               tranServerMsg,
-               NewField(fieldData, t.GetField(tranGetMsgs).Data),
-               NewField(fieldChatOptions, []byte{0}),
+               TranServerMsg,
+               NewField(FieldData, t.GetField(TranGetMsgs).Data),
+               NewField(FieldChatOptions, []byte{0}),
        )
 
        res = append(res, cc.NewReply(t))
        return res, err
 }
 
        )
 
        res = append(res, cc.NewReply(t))
        return res, err
 }
 
-func byteToInt(bytes []byte) (int, error) {
-       switch len(bytes) {
-       case 2:
-               return int(binary.BigEndian.Uint16(bytes)), nil
-       case 4:
-               return int(binary.BigEndian.Uint32(bytes)), nil
-       }
-
-       return 0, errors.New("unknown byte length")
-}
-
 // HandleGetClientInfoText returns user information for the specific user.
 //
 // Fields used in the request:
 // HandleGetClientInfoText returns user information for the specific user.
 //
 // Fields used in the request:
@@ -887,7 +914,7 @@ func HandleGetClientInfoText(cc *ClientConn, t *Transaction) (res []Transaction,
                return res, err
        }
 
                return res, err
        }
 
-       clientID, _ := byteToInt(t.GetField(fieldUserID).Data)
+       clientID, _ := byteToInt(t.GetField(FieldUserID).Data)
 
        clientConn := cc.Server.Clients[uint16(clientID)]
        if clientConn == nil {
 
        clientConn := cc.Server.Clients[uint16(clientID)]
        if clientConn == nil {
@@ -895,8 +922,8 @@ func HandleGetClientInfoText(cc *ClientConn, t *Transaction) (res []Transaction,
        }
 
        res = append(res, cc.NewReply(t,
        }
 
        res = append(res, cc.NewReply(t,
-               NewField(fieldData, []byte(clientConn.String())),
-               NewField(fieldUserName, clientConn.UserName),
+               NewField(FieldData, []byte(clientConn.String())),
+               NewField(FieldUserName, clientConn.UserName),
        ))
        return res, err
 }
        ))
        return res, err
 }
@@ -908,22 +935,20 @@ func HandleGetUserNameList(cc *ClientConn, t *Transaction) (res []Transaction, e
 }
 
 func HandleTranAgreed(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 }
 
 func HandleTranAgreed(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       cc.Agreed = true
-
-       if t.GetField(fieldUserName).Data != nil {
+       if t.GetField(FieldUserName).Data != nil {
                if cc.Authorize(accessAnyName) {
                if cc.Authorize(accessAnyName) {
-                       cc.UserName = t.GetField(fieldUserName).Data
+                       cc.UserName = t.GetField(FieldUserName).Data
                } else {
                        cc.UserName = []byte(cc.Account.Name)
                }
        }
 
                } else {
                        cc.UserName = []byte(cc.Account.Name)
                }
        }
 
-       cc.Icon = t.GetField(fieldUserIconID).Data
+       cc.Icon = t.GetField(FieldUserIconID).Data
 
        cc.logger = cc.logger.With("name", string(cc.UserName))
        cc.logger.Infow("Login successful", "clientVersion", fmt.Sprintf("%v", func() int { i, _ := byteToInt(cc.Version); return i }()))
 
 
        cc.logger = cc.logger.With("name", string(cc.UserName))
        cc.logger.Infow("Login successful", "clientVersion", fmt.Sprintf("%v", func() int { i, _ := byteToInt(cc.Version); return i }()))
 
-       options := t.GetField(fieldOptions).Data
+       options := t.GetField(FieldOptions).Data
        optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
 
        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(cc.Flags)))
        optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
 
        flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(cc.Flags)))
@@ -942,24 +967,24 @@ func HandleTranAgreed(cc *ClientConn, t *Transaction) (res []Transaction, err er
 
        // Check auto response
        if optBitmap.Bit(autoResponse) == 1 {
 
        // Check auto response
        if optBitmap.Bit(autoResponse) == 1 {
-               cc.AutoReply = t.GetField(fieldAutomaticResponse).Data
+               cc.AutoReply = t.GetField(FieldAutomaticResponse).Data
        } else {
                cc.AutoReply = []byte{}
        }
 
        trans := cc.notifyOthers(
                *NewTransaction(
        } else {
                cc.AutoReply = []byte{}
        }
 
        trans := cc.notifyOthers(
                *NewTransaction(
-                       tranNotifyChangeUser, nil,
-                       NewField(fieldUserName, cc.UserName),
-                       NewField(fieldUserID, *cc.ID),
-                       NewField(fieldUserIconID, cc.Icon),
-                       NewField(fieldUserFlags, cc.Flags),
+                       TranNotifyChangeUser, nil,
+                       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, trans...)
 
        if cc.Server.Config.BannerFile != "" {
-               res = append(res, *NewTransaction(tranServerBanner, cc.ID, NewField(fieldBannerType, []byte("JPEG"))))
+               res = append(res, *NewTransaction(TranServerBanner, cc.ID, NewField(FieldBannerType, []byte("JPEG"))))
        }
 
        res = append(res, cc.NewReply(t))
        }
 
        res = append(res, cc.NewReply(t))
@@ -967,15 +992,6 @@ func HandleTranAgreed(cc *ClientConn, t *Transaction) (res []Transaction, err er
        return res, err
 }
 
        return res, err
 }
 
-const defaultNewsDateFormat = "Jan02 15:04" // Jun23 20:49
-//  "Mon, 02 Jan 2006 15:04:05 MST"
-
-const defaultNewsTemplate = `From %s (%s):
-
-%s
-
-__________________________________________________________`
-
 // HandleTranOldPostNews updates the flat news
 // Fields used in this request:
 // 101 Data
 // HandleTranOldPostNews updates the flat news
 // Fields used in this request:
 // 101 Data
@@ -998,21 +1014,21 @@ func HandleTranOldPostNews(cc *ClientConn, t *Transaction) (res []Transaction, e
                newsTemplate = 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 := fmt.Sprintf(newsTemplate+"\r", cc.UserName, time.Now().Format(newsDateTemplate), t.GetField(FieldData).Data)
        newsPost = strings.Replace(newsPost, "\n", "\r", -1)
 
        // update news in memory
        cc.Server.FlatNews = append([]byte(newsPost), cc.Server.FlatNews...)
 
        // update news on disk
        newsPost = strings.Replace(newsPost, "\n", "\r", -1)
 
        // update news in memory
        cc.Server.FlatNews = append([]byte(newsPost), cc.Server.FlatNews...)
 
        // update news on disk
-       if err := ioutil.WriteFile(cc.Server.ConfigDir+"MessageBoard.txt", cc.Server.FlatNews, 0644); err != nil {
+       if err := cc.Server.FS.WriteFile(filepath.Join(cc.Server.ConfigDir, "MessageBoard.txt"), cc.Server.FlatNews, 0644); err != nil {
                return res, err
        }
 
        // Notify all clients of updated news
        cc.sendAll(
                return res, err
        }
 
        // Notify all clients of updated news
        cc.sendAll(
-               tranNewMsg,
-               NewField(fieldData, []byte(newsPost)),
+               TranNewMsg,
+               NewField(FieldData, []byte(newsPost)),
        )
 
        res = append(res, cc.NewReply(t))
        )
 
        res = append(res, cc.NewReply(t))
@@ -1025,27 +1041,27 @@ func HandleDisconnectUser(cc *ClientConn, t *Transaction) (res []Transaction, er
                return res, err
        }
 
                return res, err
        }
 
-       clientConn := cc.Server.Clients[binary.BigEndian.Uint16(t.GetField(fieldUserID).Data)]
+       clientConn := cc.Server.Clients[binary.BigEndian.Uint16(t.GetField(FieldUserID).Data)]
 
        if clientConn.Authorize(accessCannotBeDiscon) {
                res = append(res, cc.NewErrReply(t, clientConn.Account.Login+" is not allowed to be disconnected."))
                return res, err
        }
 
 
        if clientConn.Authorize(accessCannotBeDiscon) {
                res = append(res, cc.NewErrReply(t, clientConn.Account.Login+" is not allowed to be disconnected."))
                return res, err
        }
 
-       // If fieldOptions is set, then the client IP is banned in addition to disconnected.
+       // If FieldOptions is set, then the client IP is banned in addition to disconnected.
        // 00 01 = temporary ban
        // 00 02 = permanent ban
        // 00 01 = temporary ban
        // 00 02 = permanent ban
-       if t.GetField(fieldOptions).Data != nil {
-               switch t.GetField(fieldOptions).Data[1] {
+       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.Infow("Disconnect & temporarily ban " + string(clientConn.UserName))
 
                        res = append(res, *NewTransaction(
                case 1:
                        // send message: "You are temporarily banned on this server"
                        cc.logger.Infow("Disconnect & temporarily ban " + string(clientConn.UserName))
 
                        res = append(res, *NewTransaction(
-                               tranServerMsg,
+                               TranServerMsg,
                                clientConn.ID,
                                clientConn.ID,
-                               NewField(fieldData, []byte("You are temporarily banned on this server")),
-                               NewField(fieldChatOptions, []byte{0, 0}),
+                               NewField(FieldData, []byte("You are temporarily banned on this server")),
+                               NewField(FieldChatOptions, []byte{0, 0}),
                        ))
 
                        banUntil := time.Now().Add(tempBanDuration)
                        ))
 
                        banUntil := time.Now().Add(tempBanDuration)
@@ -1056,10 +1072,10 @@ func HandleDisconnectUser(cc *ClientConn, t *Transaction) (res []Transaction, er
                        cc.logger.Infow("Disconnect & ban " + string(clientConn.UserName))
 
                        res = append(res, *NewTransaction(
                        cc.logger.Infow("Disconnect & ban " + string(clientConn.UserName))
 
                        res = append(res, *NewTransaction(
-                               tranServerMsg,
+                               TranServerMsg,
                                clientConn.ID,
                                clientConn.ID,
-                               NewField(fieldData, []byte("You are permanently banned on this server")),
-                               NewField(fieldChatOptions, []byte{0, 0}),
+                               NewField(FieldData, []byte("You are permanently banned on this server")),
+                               NewField(FieldChatOptions, []byte{0, 0}),
                        ))
 
                        cc.Server.banList[strings.Split(clientConn.RemoteAddr, ":")[0]] = nil
                        ))
 
                        cc.Server.banList[strings.Split(clientConn.RemoteAddr, ":")[0]] = nil
@@ -1085,7 +1101,7 @@ func HandleGetNewsCatNameList(cc *ClientConn, t *Transaction) (res []Transaction
                return res, err
        }
 
                return res, err
        }
 
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
        cats := cc.Server.GetNewsCatByPath(pathStrs)
 
        // To store the keys in slice in sorted order
        cats := cc.Server.GetNewsCatByPath(pathStrs)
 
        // To store the keys in slice in sorted order
@@ -1102,7 +1118,7 @@ func HandleGetNewsCatNameList(cc *ClientConn, t *Transaction) (res []Transaction
                cat := cats[k]
                b, _ := cat.MarshalBinary()
                fieldData = append(fieldData, NewField(
                cat := cats[k]
                b, _ := cat.MarshalBinary()
                fieldData = append(fieldData, NewField(
-                       fieldNewsCatListData15,
+                       FieldNewsCatListData15,
                        b,
                ))
        }
                        b,
                ))
        }
@@ -1117,8 +1133,8 @@ func HandleNewNewsCat(cc *ClientConn, t *Transaction) (res []Transaction, err er
                return res, err
        }
 
                return res, err
        }
 
-       name := string(t.GetField(fieldNewsCatName).Data)
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
+       name := string(t.GetField(FieldNewsCatName).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
 
        cats := cc.Server.GetNewsCatByPath(pathStrs)
        cats[name] = NewsCategoryListData15{
 
        cats := cc.Server.GetNewsCatByPath(pathStrs)
        cats[name] = NewsCategoryListData15{
@@ -1144,8 +1160,8 @@ func HandleNewNewsFldr(cc *ClientConn, t *Transaction) (res []Transaction, err e
                return res, err
        }
 
                return res, err
        }
 
-       name := string(t.GetField(fieldFileName).Data)
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
+       name := string(t.GetField(FieldFileName).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
 
        cc.logger.Infof("Creating new news folder %s", name)
 
 
        cc.logger.Infof("Creating new news folder %s", name)
 
@@ -1163,17 +1179,19 @@ func HandleNewNewsFldr(cc *ClientConn, t *Transaction) (res []Transaction, err e
        return res, err
 }
 
        return res, err
 }
 
+// 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 request:
 // 325 News path       Optional
-//
-// Reply fields:
+
+// Fields used in the reply:
 // 321 News article list data  Optional
 func HandleGetNewsArtNameList(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        if !cc.Authorize(accessNewsReadArt) {
                res = append(res, cc.NewErrReply(t, "You are not allowed to read news."))
                return res, err
        }
 // 321 News article list data  Optional
 func HandleGetNewsArtNameList(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        if !cc.Authorize(accessNewsReadArt) {
                res = append(res, cc.NewErrReply(t, "You are not allowed to read news."))
                return res, err
        }
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
 
        var cat NewsCategoryListData15
        cats := cc.Server.ThreadedNews.Categories
 
        var cat NewsCategoryListData15
        cats := cc.Server.ThreadedNews.Categories
@@ -1185,61 +1203,65 @@ func HandleGetNewsArtNameList(cc *ClientConn, t *Transaction) (res []Transaction
 
        nald := cat.GetNewsArtListData()
 
 
        nald := cat.GetNewsArtListData()
 
-       res = append(res, cc.NewReply(t, NewField(fieldNewsArtListData, nald.Payload())))
+       res = append(res, cc.NewReply(t, NewField(FieldNewsArtListData, nald.Payload())))
        return res, err
 }
 
        return res, err
 }
 
+// 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, err error) {
        if !cc.Authorize(accessNewsReadArt) {
                res = append(res, cc.NewErrReply(t, "You are not allowed to read news."))
                return res, err
        }
 
 func HandleGetNewsArtData(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        if !cc.Authorize(accessNewsReadArt) {
                res = append(res, cc.NewErrReply(t, "You are not allowed to read news."))
                return res, err
        }
 
-       // Request fields
-       // 325  News fp
-       // 326  News article ID
-       // 327  News article data flavor
-
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
-
        var cat NewsCategoryListData15
        cats := cc.Server.ThreadedNews.Categories
 
        var cat NewsCategoryListData15
        cats := cc.Server.ThreadedNews.Categories
 
-       for _, fp := range pathStrs {
+       for _, fp := range ReadNewsPath(t.GetField(FieldNewsPath).Data) {
                cat = cats[fp]
                cats = cats[fp].SubCats
        }
                cat = cats[fp]
                cats = cats[fp].SubCats
        }
-       newsArtID := t.GetField(fieldNewsArtID).Data
 
 
-       convertedArtID := binary.BigEndian.Uint16(newsArtID)
+       // 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, err
+       }
 
 
-       art := cat.Articles[uint32(convertedArtID)]
+       art := cat.Articles[uint32(convertedID)]
        if art == nil {
                res = append(res, cc.NewReply(t))
                return res, err
        }
 
        if art == nil {
                res = append(res, cc.NewReply(t))
                return res, err
        }
 
-       // Reply fields
-       // 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”)
-
        res = 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)),
+               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, err
 }
        ))
        return res, err
 }
@@ -1250,7 +1272,7 @@ func HandleGetNewsArtData(cc *ClientConn, t *Transaction) (res []Transaction, er
 // Fields used in the reply:
 // None
 func HandleDelNewsItem(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 // Fields used in the reply:
 // None
 func HandleDelNewsItem(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
 
        cats := cc.Server.ThreadedNews.Categories
        delName := pathStrs[len(pathStrs)-1]
 
        cats := cc.Server.ThreadedNews.Categories
        delName := pathStrs[len(pathStrs)-1]
@@ -1260,7 +1282,7 @@ func HandleDelNewsItem(cc *ClientConn, t *Transaction) (res []Transaction, err e
                }
        }
 
                }
        }
 
-       if bytes.Compare(cats[delName].Type, []byte{0, 3}) == 0 {
+       if bytes.Equal(cats[delName].Type, []byte{0, 3}) {
                if !cc.Authorize(accessNewsDeleteCat) {
                        return append(res, cc.NewErrReply(t, "You are not allowed to delete news categories.")), nil
                }
                if !cc.Authorize(accessNewsDeleteCat) {
                        return append(res, cc.NewErrReply(t, "You are not allowed to delete news categories.")), nil
                }
@@ -1289,8 +1311,11 @@ func HandleDelNewsArt(cc *ClientConn, t *Transaction) (res []Transaction, err er
        // 325  News path
        // 326  News article ID
        // 337  News article – recursive delete       Delete child articles (1) or not (0)
        // 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 := binary.BigEndian.Uint16(t.GetField(fieldNewsArtID).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
+       ID, err := byteToInt(t.GetField(FieldNewsArtID).Data)
+       if err != nil {
+               return res, err
+       }
 
        // TODO: Delete recursive
        cats := cc.Server.GetNewsCatByPath(pathStrs[:len(pathStrs)-1])
 
        // TODO: Delete recursive
        cats := cc.Server.GetNewsCatByPath(pathStrs[:len(pathStrs)-1])
@@ -1322,22 +1347,30 @@ func HandlePostNewsArt(cc *ClientConn, t *Transaction) (res []Transaction, err e
                return res, err
        }
 
                return res, err
        }
 
-       pathStrs := ReadNewsPath(t.GetField(fieldNewsPath).Data)
+       pathStrs := ReadNewsPath(t.GetField(FieldNewsPath).Data)
        cats := cc.Server.GetNewsCatByPath(pathStrs[:len(pathStrs)-1])
 
        catName := pathStrs[len(pathStrs)-1]
        cat := cats[catName]
 
        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, err
+       }
+       convertedArtID := uint32(artID)
+       bs := make([]byte, 4)
+       binary.BigEndian.PutUint32(bs, convertedArtID)
+
        newArt := NewsArtData{
        newArt := NewsArtData{
-               Title:         string(t.GetField(fieldNewsArtTitle).Data),
+               Title:         string(t.GetField(FieldNewsArtTitle).Data),
                Poster:        string(cc.UserName),
                Date:          toHotlineTime(time.Now()),
                PrevArt:       []byte{0, 0, 0, 0},
                NextArt:       []byte{0, 0, 0, 0},
                Poster:        string(cc.UserName),
                Date:          toHotlineTime(time.Now()),
                PrevArt:       []byte{0, 0, 0, 0},
                NextArt:       []byte{0, 0, 0, 0},
-               ParentArt:     append([]byte{0, 0}, t.GetField(fieldNewsArtID).Data...),
+               ParentArt:     bs,
                FirstChildArt: []byte{0, 0, 0, 0},
                DataFlav:      []byte("text/plain"),
                FirstChildArt: []byte{0, 0, 0, 0},
                DataFlav:      []byte("text/plain"),
-               Data:          string(t.GetField(fieldNewsArtData).Data),
+               Data:          string(t.GetField(FieldNewsArtData).Data),
        }
 
        var keys []int
        }
 
        var keys []int
@@ -1358,9 +1391,9 @@ func HandlePostNewsArt(cc *ClientConn, t *Transaction) (res []Transaction, err e
        }
 
        // Update parent article with first child reply
        }
 
        // Update parent article with first child reply
-       parentID := binary.BigEndian.Uint16(t.GetField(fieldNewsArtID).Data)
+       parentID := convertedArtID
        if parentID != 0 {
        if parentID != 0 {
-               parentArt := cat.Articles[uint32(parentID)]
+               parentArt := cat.Articles[parentID]
 
                if bytes.Equal(parentArt.FirstChildArt, []byte{0, 0, 0, 0}) {
                        binary.BigEndian.PutUint32(parentArt.FirstChildArt, nextID)
 
                if bytes.Equal(parentArt.FirstChildArt, []byte{0, 0, 0, 0}) {
                        binary.BigEndian.PutUint32(parentArt.FirstChildArt, nextID)
@@ -1385,7 +1418,7 @@ func HandleGetMsgs(cc *ClientConn, t *Transaction) (res []Transaction, err error
                return res, err
        }
 
                return res, err
        }
 
-       res = append(res, cc.NewReply(t, NewField(fieldData, cc.Server.FlatNews)))
+       res = append(res, cc.NewReply(t, NewField(FieldData, cc.Server.FlatNews)))
 
        return res, err
 }
 
        return res, err
 }
@@ -1396,14 +1429,14 @@ func HandleDownloadFile(cc *ClientConn, t *Transaction) (res []Transaction, err
                return res, err
        }
 
                return res, err
        }
 
-       fileName := t.GetField(fieldFileName).Data
-       filePath := t.GetField(fieldFilePath).Data
-       resumeData := t.GetField(fieldFileResumeData).Data
+       fileName := t.GetField(FieldFileName).Data
+       filePath := t.GetField(FieldFilePath).Data
+       resumeData := t.GetField(FieldFileResumeData).Data
 
        var dataOffset int64
        var frd FileResumeData
        if resumeData != nil {
 
        var dataOffset int64
        var frd FileResumeData
        if resumeData != nil {
-               if err := frd.UnmarshalBinary(t.GetField(fieldFileResumeData).Data); err != nil {
+               if err := frd.UnmarshalBinary(t.GetField(FieldFileResumeData).Data); err != nil {
                        return res, err
                }
                // TODO: handle rsrc fork offset
                        return res, err
                }
                // TODO: handle rsrc fork offset
@@ -1427,7 +1460,7 @@ func HandleDownloadFile(cc *ClientConn, t *Transaction) (res []Transaction, err
        // TODO: refactor to remove this
        if resumeData != nil {
                var frd FileResumeData
        // TODO: refactor to remove this
        if resumeData != nil {
                var frd FileResumeData
-               if err := frd.UnmarshalBinary(t.GetField(fieldFileResumeData).Data); err != nil {
+               if err := frd.UnmarshalBinary(t.GetField(FieldFileResumeData).Data); err != nil {
                        return res, err
                }
                ft.fileResumeData = &frd
                        return res, err
                }
                ft.fileResumeData = &frd
@@ -1436,16 +1469,16 @@ func HandleDownloadFile(cc *ClientConn, t *Transaction) (res []Transaction, err
        // 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
        // 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
+       if t.GetField(FieldFileTransferOptions).Data != nil {
+               ft.options = t.GetField(FieldFileTransferOptions).Data
                xferSize = hlFile.ffo.FlatFileDataForkHeader.DataSize[:]
        }
 
        res = append(res, cc.NewReply(t,
                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[:]),
+               NewField(FieldRefNum, ft.refNum[:]),
+               NewField(FieldWaitingCount, []byte{0x00, 0x00}), // TODO: Implement waiting count
+               NewField(FieldTransferSize, xferSize),
+               NewField(FieldFileSize, hlFile.ffo.FlatFileDataForkHeader.DataSize[:]),
        ))
 
        return res, err
        ))
 
        return res, err
@@ -1458,7 +1491,7 @@ func HandleDownloadFolder(cc *ClientConn, t *Transaction) (res []Transaction, er
                return res, err
        }
 
                return res, err
        }
 
-       fullFilePath, err := readPath(cc.Server.Config.FileRoot, t.GetField(fieldFilePath).Data, t.GetField(fieldFileName).Data)
+       fullFilePath, err := readPath(cc.Server.Config.FileRoot, t.GetField(FieldFilePath).Data, t.GetField(FieldFileName).Data)
        if err != nil {
                return res, err
        }
        if err != nil {
                return res, err
        }
@@ -1472,19 +1505,19 @@ func HandleDownloadFolder(cc *ClientConn, t *Transaction) (res []Transaction, er
                return res, err
        }
 
                return res, err
        }
 
-       fileTransfer := cc.newFileTransfer(FolderDownload, t.GetField(fieldFileName).Data, t.GetField(fieldFilePath).Data, transferSize)
+       fileTransfer := cc.newFileTransfer(FolderDownload, t.GetField(FieldFileName).Data, t.GetField(FieldFilePath).Data, transferSize)
 
        var fp FilePath
 
        var fp FilePath
-       _, err = fp.Write(t.GetField(fieldFilePath).Data)
+       _, err = fp.Write(t.GetField(FieldFilePath).Data)
        if err != nil {
                return res, err
        }
 
        res = append(res, cc.NewReply(t,
        if err != nil {
                return res, err
        }
 
        res = append(res, cc.NewReply(t,
-               NewField(fieldRefNum, fileTransfer.ReferenceNumber),
-               NewField(fieldTransferSize, transferSize),
-               NewField(fieldFolderItemCount, itemCount),
-               NewField(fieldWaitingCount, []byte{0x00, 0x00}), // TODO: Implement waiting count
+               NewField(FieldRefNum, fileTransfer.ReferenceNumber),
+               NewField(FieldTransferSize, transferSize),
+               NewField(FieldFolderItemCount, itemCount),
+               NewField(FieldWaitingCount, []byte{0x00, 0x00}), // TODO: Implement waiting count
        ))
        return res, err
 }
        ))
        return res, err
 }
@@ -1498,8 +1531,8 @@ func HandleDownloadFolder(cc *ClientConn, t *Transaction) (res []Transaction, er
 // 204 File transfer options   "Optional Currently set to 1" (TODO: ??)
 func HandleUploadFolder(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        var fp FilePath
 // 204 File transfer options   "Optional Currently set to 1" (TODO: ??)
 func HandleUploadFolder(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        var fp FilePath
-       if t.GetField(fieldFilePath).Data != nil {
-               if _, err = fp.Write(t.GetField(fieldFilePath).Data); err != nil {
+       if t.GetField(FieldFilePath).Data != nil {
+               if _, err = fp.Write(t.GetField(FieldFilePath).Data); err != nil {
                        return res, err
                }
        }
                        return res, err
                }
        }
@@ -1507,20 +1540,20 @@ func HandleUploadFolder(cc *ClientConn, t *Transaction) (res []Transaction, err
        // Handle special cases for Upload and Drop Box folders
        if !cc.Authorize(accessUploadAnywhere) {
                if !fp.IsUploadDir() && !fp.IsDropbox() {
        // Handle special cases for Upload and Drop Box folders
        if !cc.Authorize(accessUploadAnywhere) {
                if !fp.IsUploadDir() && !fp.IsDropbox() {
-                       res = append(res, 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))))
+                       res = append(res, 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))))
                        return res, err
                }
        }
 
        fileTransfer := cc.newFileTransfer(FolderUpload,
                        return res, err
                }
        }
 
        fileTransfer := cc.newFileTransfer(FolderUpload,
-               t.GetField(fieldFileName).Data,
-               t.GetField(fieldFilePath).Data,
-               t.GetField(fieldTransferSize).Data,
+               t.GetField(FieldFileName).Data,
+               t.GetField(FieldFilePath).Data,
+               t.GetField(FieldTransferSize).Data,
        )
 
        )
 
-       fileTransfer.FolderItemCount = t.GetField(fieldFolderItemCount).Data
+       fileTransfer.FolderItemCount = t.GetField(FieldFolderItemCount).Data
 
 
-       res = append(res, cc.NewReply(t, NewField(fieldRefNum, fileTransfer.ReferenceNumber)))
+       res = append(res, cc.NewReply(t, NewField(FieldRefNum, fileTransfer.ReferenceNumber)))
        return res, err
 }
 
        return res, err
 }
 
@@ -1537,10 +1570,10 @@ func HandleUploadFile(cc *ClientConn, t *Transaction) (res []Transaction, err er
                return res, err
        }
 
                return res, err
        }
 
-       fileName := t.GetField(fieldFileName).Data
-       filePath := t.GetField(fieldFilePath).Data
-       transferOptions := t.GetField(fieldFileTransferOptions).Data
-       transferSize := t.GetField(fieldTransferSize).Data // not sent for resume
+       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 {
 
        var fp FilePath
        if filePath != nil {
@@ -1568,7 +1601,7 @@ func HandleUploadFile(cc *ClientConn, t *Transaction) (res []Transaction, err er
 
        ft := cc.newFileTransfer(FileUpload, fileName, filePath, transferSize)
 
 
        ft := cc.newFileTransfer(FileUpload, fileName, filePath, transferSize)
 
-       replyT := cc.NewReply(t, NewField(fieldRefNum, ft.ReferenceNumber))
+       replyT := cc.NewReply(t, NewField(FieldRefNum, ft.ReferenceNumber))
 
        // client has requested to resume a partially transferred file
        if transferOptions != nil {
 
        // client has requested to resume a partially transferred file
        if transferOptions != nil {
@@ -1589,7 +1622,7 @@ func HandleUploadFile(cc *ClientConn, t *Transaction) (res []Transaction, err er
 
                ft.TransferSize = offset
 
 
                ft.TransferSize = offset
 
-               replyT.Fields = append(replyT.Fields, NewField(fieldFileResumeData, b))
+               replyT.Fields = append(replyT.Fields, NewField(FieldFileResumeData, b))
        }
 
        res = append(res, replyT)
        }
 
        res = append(res, replyT)
@@ -1597,17 +1630,17 @@ func HandleUploadFile(cc *ClientConn, t *Transaction) (res []Transaction, err er
 }
 
 func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 }
 
 func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       if len(t.GetField(fieldUserIconID).Data) == 4 {
-               cc.Icon = t.GetField(fieldUserIconID).Data[2:]
+       if len(t.GetField(FieldUserIconID).Data) == 4 {
+               cc.Icon = t.GetField(FieldUserIconID).Data[2:]
        } else {
        } else {
-               cc.Icon = t.GetField(fieldUserIconID).Data
+               cc.Icon = t.GetField(FieldUserIconID).Data
        }
        if cc.Authorize(accessAnyName) {
        }
        if cc.Authorize(accessAnyName) {
-               cc.UserName = t.GetField(fieldUserName).Data
+               cc.UserName = t.GetField(FieldUserName).Data
        }
 
        // the options field is only passed by the client versions > 1.2.3.
        }
 
        // the options field is only passed by the client versions > 1.2.3.
-       options := t.GetField(fieldOptions).Data
+       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)))
        if options != nil {
                optBitmap := big.NewInt(int64(binary.BigEndian.Uint16(options)))
                flagBitmap := big.NewInt(int64(binary.BigEndian.Uint16(cc.Flags)))
@@ -1620,7 +1653,7 @@ func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction,
 
                // Check auto response
                if optBitmap.Bit(autoResponse) == 1 {
 
                // Check auto response
                if optBitmap.Bit(autoResponse) == 1 {
-                       cc.AutoReply = t.GetField(fieldAutomaticResponse).Data
+                       cc.AutoReply = t.GetField(FieldAutomaticResponse).Data
                } else {
                        cc.AutoReply = []byte{}
                }
                } else {
                        cc.AutoReply = []byte{}
                }
@@ -1628,12 +1661,12 @@ func HandleSetClientUserInfo(cc *ClientConn, t *Transaction) (res []Transaction,
 
        for _, c := range sortedClients(cc.Server.Clients) {
                res = append(res, *NewTransaction(
 
        for _, c := range sortedClients(cc.Server.Clients) {
                res = append(res, *NewTransaction(
-                       tranNotifyChangeUser,
+                       TranNotifyChangeUser,
                        c.ID,
                        c.ID,
-                       NewField(fieldUserID, *cc.ID),
-                       NewField(fieldUserIconID, cc.Icon),
-                       NewField(fieldUserFlags, cc.Flags),
-                       NewField(fieldUserName, cc.UserName),
+                       NewField(FieldUserID, *cc.ID),
+                       NewField(FieldUserIconID, cc.Icon),
+                       NewField(FieldUserFlags, cc.Flags),
+                       NewField(FieldUserName, cc.UserName),
                ))
        }
 
                ))
        }
 
@@ -1652,7 +1685,7 @@ func HandleKeepAlive(cc *ClientConn, t *Transaction) (res []Transaction, err err
 func HandleGetFileNameList(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        fullPath, err := readPath(
                cc.Server.Config.FileRoot,
 func HandleGetFileNameList(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        fullPath, err := readPath(
                cc.Server.Config.FileRoot,
-               t.GetField(fieldFilePath).Data,
+               t.GetField(FieldFilePath).Data,
                nil,
        )
        if err != nil {
                nil,
        )
        if err != nil {
@@ -1660,8 +1693,8 @@ func HandleGetFileNameList(cc *ClientConn, t *Transaction) (res []Transaction, e
        }
 
        var fp FilePath
        }
 
        var fp FilePath
-       if t.GetField(fieldFilePath).Data != nil {
-               if _, err = fp.Write(t.GetField(fieldFilePath).Data); err != nil {
+       if t.GetField(FieldFilePath).Data != nil {
+               if _, err = fp.Write(t.GetField(FieldFilePath).Data); err != nil {
                        return res, err
                }
        }
                        return res, err
                }
        }
@@ -1685,14 +1718,14 @@ func HandleGetFileNameList(cc *ClientConn, t *Transaction) (res []Transaction, e
 // =================================
 //     Hotline private chat flow
 // =================================
 // =================================
 //     Hotline private chat flow
 // =================================
-// 1. ClientA sends tranInviteNewChat to server with user ID to invite
+// 1. ClientA sends TranInviteNewChat to server with user ID to invite
 // 2. Server creates new ChatID
 // 2. Server creates new ChatID
-// 3. Server sends tranInviteToChat to invitee
+// 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:
 // 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
+// 1. ClientB sends TranJoinChat with FieldChatID
 
 // HandleInviteNewChat invites users to new private chat
 func HandleInviteNewChat(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 
 // HandleInviteNewChat invites users to new private chat
 func HandleInviteNewChat(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
@@ -1702,26 +1735,44 @@ func HandleInviteNewChat(cc *ClientConn, t *Transaction) (res []Transaction, err
        }
 
        // Client to Invite
        }
 
        // Client to Invite
-       targetID := t.GetField(fieldUserID).Data
+       targetID := t.GetField(FieldUserID).Data
        newChatID := cc.Server.NewPrivateChat(cc)
 
        newChatID := cc.Server.NewPrivateChat(cc)
 
-       res = append(res,
-               *NewTransaction(
-                       tranInviteToChat,
-                       &targetID,
-                       NewField(fieldChatID, newChatID),
-                       NewField(fieldUserName, cc.UserName),
-                       NewField(fieldUserID, *cc.ID),
-               ),
-       )
+       // Check if target user has "Refuse private chat" flag
+       binary.BigEndian.Uint16(targetID)
+       targetClient := cc.Server.Clients[binary.BigEndian.Uint16(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,
+                               &targetID,
+                               NewField(FieldChatID, newChatID),
+                               NewField(FieldUserName, cc.UserName),
+                               NewField(FieldUserID, *cc.ID),
+                       ),
+               )
+       }
 
        res = append(res,
                cc.NewReply(t,
 
        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),
+                       NewField(FieldChatID, newChatID),
+                       NewField(FieldUserName, cc.UserName),
+                       NewField(FieldUserID, *cc.ID),
+                       NewField(FieldUserIconID, cc.Icon),
+                       NewField(FieldUserFlags, cc.Flags),
                ),
        )
 
                ),
        )
 
@@ -1735,26 +1786,26 @@ func HandleInviteToChat(cc *ClientConn, t *Transaction) (res []Transaction, err
        }
 
        // Client to Invite
        }
 
        // Client to Invite
-       targetID := t.GetField(fieldUserID).Data
-       chatID := t.GetField(fieldChatID).Data
+       targetID := t.GetField(FieldUserID).Data
+       chatID := t.GetField(FieldChatID).Data
 
        res = append(res,
                *NewTransaction(
 
        res = append(res,
                *NewTransaction(
-                       tranInviteToChat,
+                       TranInviteToChat,
                        &targetID,
                        &targetID,
-                       NewField(fieldChatID, chatID),
-                       NewField(fieldUserName, cc.UserName),
-                       NewField(fieldUserID, *cc.ID),
+                       NewField(FieldChatID, chatID),
+                       NewField(FieldUserName, cc.UserName),
+                       NewField(FieldUserID, *cc.ID),
                ),
        )
        res = append(res,
                cc.NewReply(
                        t,
                ),
        )
        res = append(res,
                cc.NewReply(
                        t,
-                       NewField(fieldChatID, chatID),
-                       NewField(fieldUserName, cc.UserName),
-                       NewField(fieldUserID, *cc.ID),
-                       NewField(fieldUserIconID, cc.Icon),
-                       NewField(fieldUserFlags, cc.Flags),
+                       NewField(FieldChatID, chatID),
+                       NewField(FieldUserName, cc.UserName),
+                       NewField(FieldUserID, *cc.ID),
+                       NewField(FieldUserIconID, cc.Icon),
+                       NewField(FieldUserFlags, cc.Flags),
                ),
        )
 
                ),
        )
 
@@ -1762,7 +1813,7 @@ func HandleInviteToChat(cc *ClientConn, t *Transaction) (res []Transaction, err
 }
 
 func HandleRejectChatInvite(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 }
 
 func HandleRejectChatInvite(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       chatID := t.GetField(fieldChatID).Data
+       chatID := t.GetField(FieldChatID).Data
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat := cc.Server.PrivateChats[chatInt]
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat := cc.Server.PrivateChats[chatInt]
@@ -1772,10 +1823,10 @@ func HandleRejectChatInvite(cc *ClientConn, t *Transaction) (res []Transaction,
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
-                               tranChatMsg,
+                               TranChatMsg,
                                c.ID,
                                c.ID,
-                               NewField(fieldChatID, chatID),
-                               NewField(fieldData, resMsg),
+                               NewField(FieldChatID, chatID),
+                               NewField(FieldData, resMsg),
                        ),
                )
        }
                        ),
                )
        }
@@ -1789,29 +1840,29 @@ func HandleRejectChatInvite(cc *ClientConn, t *Transaction) (res []Transaction,
 // * 300       User name with info (Optional)
 // * 300       (more user names with info)
 func HandleJoinChat(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 // * 300       User name with info (Optional)
 // * 300       (more user names with info)
 func HandleJoinChat(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       chatID := t.GetField(fieldChatID).Data
+       chatID := t.GetField(FieldChatID).Data
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat := cc.Server.PrivateChats[chatInt]
 
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat := cc.Server.PrivateChats[chatInt]
 
-       // Send tranNotifyChatChangeUser to current members of the chat to inform of new user
+       // Send TranNotifyChatChangeUser to current members of the chat to inform of new user
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
-                               tranNotifyChatChangeUser,
+                               TranNotifyChatChangeUser,
                                c.ID,
                                c.ID,
-                               NewField(fieldChatID, chatID),
-                               NewField(fieldUserName, cc.UserName),
-                               NewField(fieldUserID, *cc.ID),
-                               NewField(fieldUserIconID, cc.Icon),
-                               NewField(fieldUserFlags, cc.Flags),
+                               NewField(FieldChatID, chatID),
+                               NewField(FieldUserName, cc.UserName),
+                               NewField(FieldUserID, *cc.ID),
+                               NewField(FieldUserIconID, cc.Icon),
+                               NewField(FieldUserFlags, cc.Flags),
                        ),
                )
        }
 
        privChat.ClientConn[cc.uint16ID()] = cc
 
                        ),
                )
        }
 
        privChat.ClientConn[cc.uint16ID()] = cc
 
-       replyFields := []Field{NewField(fieldChatSubject, []byte(privChat.Subject))}
+       replyFields := []Field{NewField(FieldChatSubject, []byte(privChat.Subject))}
        for _, c := range sortedClients(privChat.ClientConn) {
                user := User{
                        ID:    *c.ID,
        for _, c := range sortedClients(privChat.ClientConn) {
                user := User{
                        ID:    *c.ID,
@@ -1820,7 +1871,7 @@ func HandleJoinChat(cc *ClientConn, t *Transaction) (res []Transaction, err erro
                        Name:  string(c.UserName),
                }
 
                        Name:  string(c.UserName),
                }
 
-               replyFields = append(replyFields, NewField(fieldUsernameWithInfo, user.Payload()))
+               replyFields = append(replyFields, NewField(FieldUsernameWithInfo, user.Payload()))
        }
 
        res = append(res, cc.NewReply(t, replyFields...))
        }
 
        res = append(res, cc.NewReply(t, replyFields...))
@@ -1829,10 +1880,11 @@ func HandleJoinChat(cc *ClientConn, t *Transaction) (res []Transaction, err erro
 
 // HandleLeaveChat is sent from a v1.8+ Hotline client when the user exits a private chat
 // Fields used in the request:
 
 // HandleLeaveChat is sent from a v1.8+ Hotline client when the user exits a private chat
 // Fields used in the request:
-//     * 114   fieldChatID
+//   - 114     FieldChatID
+//
 // Reply is not expected.
 func HandleLeaveChat(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 // Reply is not expected.
 func HandleLeaveChat(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       chatID := t.GetField(fieldChatID).Data
+       chatID := t.GetField(FieldChatID).Data
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat, ok := cc.Server.PrivateChats[chatInt]
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat, ok := cc.Server.PrivateChats[chatInt]
@@ -1846,10 +1898,10 @@ func HandleLeaveChat(cc *ClientConn, t *Transaction) (res []Transaction, err err
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
-                               tranNotifyChatDeleteUser,
+                               TranNotifyChatDeleteUser,
                                c.ID,
                                c.ID,
-                               NewField(fieldChatID, chatID),
-                               NewField(fieldUserID, *cc.ID),
+                               NewField(FieldChatID, chatID),
+                               NewField(FieldUserID, *cc.ID),
                        ),
                )
        }
                        ),
                )
        }
@@ -1860,22 +1912,22 @@ func HandleLeaveChat(cc *ClientConn, t *Transaction) (res []Transaction, err err
 // 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
 // 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    Chat subject string
+// * 115       Chat subject
 // Reply is not expected.
 func HandleSetChatSubject(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
 // Reply is not expected.
 func HandleSetChatSubject(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
-       chatID := t.GetField(fieldChatID).Data
+       chatID := t.GetField(FieldChatID).Data
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat := cc.Server.PrivateChats[chatInt]
        chatInt := binary.BigEndian.Uint32(chatID)
 
        privChat := cc.Server.PrivateChats[chatInt]
-       privChat.Subject = string(t.GetField(fieldChatSubject).Data)
+       privChat.Subject = string(t.GetField(FieldChatSubject).Data)
 
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
 
        for _, c := range sortedClients(privChat.ClientConn) {
                res = append(res,
                        *NewTransaction(
-                               tranNotifyChatSubject,
+                               TranNotifyChatSubject,
                                c.ID,
                                c.ID,
-                               NewField(fieldChatID, chatID),
-                               NewField(fieldChatSubject, t.GetField(fieldChatSubject).Data),
+                               NewField(FieldChatID, chatID),
+                               NewField(FieldChatSubject, t.GetField(FieldChatSubject).Data),
                        ),
                )
        }
                        ),
                )
        }
@@ -1883,7 +1935,7 @@ func HandleSetChatSubject(cc *ClientConn, t *Transaction) (res []Transaction, er
        return res, err
 }
 
        return res, err
 }
 
-// HandleMakeAlias makes a filer alias using the specified path.
+// HandleMakeAlias makes a file alias using the specified path.
 // Fields used in the request:
 // 201 File name
 // 202 File path
 // Fields used in the request:
 // 201 File name
 // 202 File path
@@ -1896,9 +1948,9 @@ func HandleMakeAlias(cc *ClientConn, t *Transaction) (res []Transaction, err err
                res = append(res, cc.NewErrReply(t, "You are not allowed to make aliases."))
                return res, err
        }
                res = append(res, cc.NewErrReply(t, "You are not allowed to make aliases."))
                return res, err
        }
-       fileName := t.GetField(fieldFileName).Data
-       filePath := t.GetField(fieldFilePath).Data
-       fileNewPath := t.GetField(fieldFileNewPath).Data
+       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 {
 
        fullFilePath, err := readPath(cc.Server.Config.FileRoot, filePath, fileName)
        if err != nil {
@@ -1925,8 +1977,8 @@ func HandleMakeAlias(cc *ClientConn, t *Transaction) (res []Transaction, err err
 // Fields used in the request:
 // None
 // Fields used in the reply:
 // 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
+// 107 FieldRefNum                     Used later for transfer
+// 108 FieldTransferSize       Size of data to be downloaded
 func HandleDownloadBanner(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        fi, err := cc.Server.FS.Stat(filepath.Join(cc.Server.ConfigDir, cc.Server.Config.BannerFile))
        if err != nil {
 func HandleDownloadBanner(cc *ClientConn, t *Transaction) (res []Transaction, err error) {
        fi, err := cc.Server.FS.Stat(filepath.Join(cc.Server.ConfigDir, cc.Server.Config.BannerFile))
        if err != nil {
@@ -1938,8 +1990,8 @@ func HandleDownloadBanner(cc *ClientConn, t *Transaction) (res []Transaction, er
        binary.BigEndian.PutUint32(ft.TransferSize, uint32(fi.Size()))
 
        res = append(res, cc.NewReply(t,
        binary.BigEndian.PutUint32(ft.TransferSize, uint32(fi.Size()))
 
        res = append(res, cc.NewReply(t,
-               NewField(fieldRefNum, ft.refNum[:]),
-               NewField(fieldTransferSize, ft.TransferSize),
+               NewField(FieldRefNum, ft.refNum[:]),
+               NewField(FieldTransferSize, ft.TransferSize),
        ))
 
        return res, err
        ))
 
        return res, err
Friendship Quest remix of mobius, a hotline server in go #cli