TFTPServer Class
Properties Methods Events Configuration Settings Errors
TBD.
Syntax
ipworks.tftpserver()
Remarks
TBD.
Property List
The following is the full list of the properties of the class with short descriptions. Click on the links for further details.
AcceptData | Enables or disables data reception (the DataIn event). |
Active | Enables or disables sending and receiving of data. |
Connections | TBD. |
DefaultFileDir | The default local file directory for connecting clients. |
LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
LocalPort | TBD. |
MaxRetransmits | The number of times to retry sending a failed packet before disconnecting. |
RetransmitTimeout | Maximum time in seconds to wait for a reply packet from the server before retransmitting the last packet. |
Timeout | A timeout for the class. |
Method List
The following is the full list of the methods of the class with short descriptions. Click on the links for further details.
Config | Sets or retrieves a configuration setting. |
DoEvents | Processes events from the internal message queue. |
Event List
The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.
Connected | TBD. |
ConnectionRequest | TBD. |
Disconnected | TBD. |
EndTransfer | TBD. |
Error | Information about errors during data delivery. |
Log | Fires once for each log message. |
StartTransfer | TBD. |
Transfer | TBD. |
Configuration Settings
The following is a list of configuration settings for the class with short descriptions. Click on the links for further details.
CaptureIPPacketInfo | Used to capture the packet information. |
DelayHostResolution | Whether the hostname is resolved when RemoteHost is set. |
DestinationAddress | Used to get the destination address from the packet information. |
DontFragment | Used to set the Don't Fragment flag of outgoing packets. |
LocalHost | The name of the local host through which connections are initiated or accepted. |
LocalPort | The port in the local host where the class binds. |
MaxPacketSize | The maximum length of the packets that can be received. |
QOSDSCPValue | Used to specify an arbitrary QOS/DSCP setting (optional). |
QOSTrafficType | Used to specify QOS/DSCP settings (optional). |
ShareLocalPort | If set to True, allows more than one instance of the class to be active on the same local port. |
UseConnection | Determines whether to use a connected socket. |
UseIPv6 | Whether or not to use IPv6. |
AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
FirewallData | Used to send extra data to the firewall. |
InBufferSize | The size in bytes of the incoming queue of the socket. |
OutBufferSize | The size in bytes of the outgoing queue of the socket. |
BuildInfo | Information about the product's build. |
CodePage | The system code page used for Unicode to Multibyte translations. |
LicenseInfo | Information about the current license. |
UseInternalSecurityAPI | Tells the class whether or not to use the system security libraries or an internal implementation. |
TFTPServer.AcceptData Property
Enables or disables data reception (the DataIn event).
Syntax
isAcceptData(): boolean; setAcceptData(acceptData: boolean): void;
Default Value
TRUE
Remarks
This property enables or disables data reception (the DataIn event). Setting this property to False, temporarily disables data reception (and the DataIn event). Setting this property to True, re-enables data reception.
Note: It is recommended to use the PauseData or ProcessData method instead of setting this property.
This property is not available at design time.
TFTPServer.Active Property
Enables or disables sending and receiving of data.
Syntax
isActive(): boolean; setActive(active: boolean): void;
Default Value
FALSE
Remarks
Setting the Active property to True makes the class create a communication endpoint (socket) which can be used for sending and receiving UDP datagrams. Setting it to False destroys the socket and disables data communications.
If UseConnection is set to True, then a local association (connection) to the remote host and port is also created.
Note: It is recommended to use the Activate or Deactivate method instead of setting this property.
This property is not available at design time.
TFTPServer.Connections Property
TBD.
Syntax
getConnections(): TFTPConnectionMap;
Default Value
Remarks
TBD.
This property is read-only and not available at design time.
TFTPServer.DefaultFileDir Property
The default local file directory for connecting clients.
Syntax
getDefaultFileDir(): string; setDefaultFileDir(defaultFileDir: string): void;
Default Value
""
Remarks
This property defines the local file directory for users with an empty local file directory value.
This property is not available at design time.
TFTPServer.LocalHost Property
The name of the local host or user-assigned IP interface through which connections are initiated or accepted.
Syntax
getLocalHost(): string; setLocalHost(localHost: string): void;
Default Value
""
Remarks
The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.
In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.
If the class is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).
NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.
TFTPServer.LocalPort Property
TBD.
Syntax
getLocalPort(): number; setLocalPort(localPort: number): void;
Default Value
69
Remarks
TBD.
TFTPServer.MaxRetransmits Property
The number of times to retry sending a failed packet before disconnecting.
Syntax
getMaxRetransmits(): number; setMaxRetransmits(maxRetransmits: number): void;
Default Value
3
Remarks
This property allows you to specify the number of times that you would like to try re-sending the last data packet if the original packet fails.
The RetransmitTimeout determines the wait time (in seconds) between successive retransmissions.
The default value for the MaxRetransmits property is 3.
TFTPServer.RetransmitTimeout Property
Maximum time in seconds to wait for a reply packet from the server before retransmitting the last packet.
Syntax
getRetransmitTimeout(): number; setRetransmitTimeout(retransmitTimeout: number): void;
Default Value
5
Remarks
Please refer to the MaxRetransmits property for the number of retransmit efforts before an error is returned.
The default value for the RetransmitTimeout is 5 seconds.
TFTPServer.Timeout Property
A timeout for the class.
Syntax
getTimeout(): number; setTimeout(timeout: number): void;
Default Value
60
Remarks
If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.
If Timeout is set to a positive value, the class will wait for the operation to complete before returning control.
The class will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.
If Timeout expires, and the operation is not yet complete, the class fails with an error.
Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.
The default value for the Timeout property is 60 seconds.
TFTPServer.config Method
Sets or retrieves a configuration setting.
Syntax
async tftpserver.config(configurationString : string): Promise<string>
Remarks
Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.
These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.
To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).
To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.
TFTPServer.doEvents Method
Processes events from the internal message queue.
Syntax
async tftpserver.doEvents(): Promise<void>
Remarks
When DoEvents is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.
TFTPServer.Connected Event
TBD.
Syntax
tftpserver.on('Connected', listener: (e: {readonly connectionId: string, readonly statusCode: number, readonly description: string}) => void )
Remarks
TBD.
TFTPServer.ConnectionRequest Event
TBD.
Syntax
tftpserver.on('ConnectionRequest', listener: (e: {readonly remoteHost: string, readonly remotePort: number, readonly filename: string, readonly transferMode: string, readonly isRead: boolean, accept: boolean}) => void )
Remarks
TBD.
TFTPServer.Disconnected Event
TBD.
Syntax
tftpserver.on('Disconnected', listener: (e: {readonly connectionId: string, readonly statusCode: number, readonly description: string}) => void )
Remarks
TBD.
TFTPServer.EndTransfer Event
TBD.
Syntax
tftpserver.on('EndTransfer', listener: (e: {readonly connectionId: string, readonly direction: number}) => void )
Remarks
TBD.
TFTPServer.Error Event
Information about errors during data delivery.
Syntax
tftpserver.on('Error', listener: (e: {readonly errorCode: number, readonly description: string}) => void )
Remarks
The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.
ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.
TFTPServer.Log Event
Fires once for each log message.
Syntax
tftpserver.on('Log', listener: (e: {readonly connectionId: string, readonly logLevel: number, readonly message: string, readonly logType: string}) => void )
Remarks
This event fires once for each log message generated by the class. The verbosity is controlled by the LogLevel setting.
LogLevel indicates the level of message. Possible values are:
0 (None) | No events are logged. |
1 (Info - default) | Informational events are logged. |
2 (Verbose) | Detailed data is logged. |
3 (Debug) | Debug data is logged. |
The value 1 (Info) logs basic information including users logging in and out, files transferred and directories listed.
The value 2 (Verbose) includes logs from the PITrail event as well as basic information about data transfer channels.
The value 3 (Debug) logs additional debug information such as extended socket connection and data transfer information.
Message is the log entry.
LogType identifies the type of log entry. Possible values are:
- "Info"
- "Error"
- "Verbose"
- "Debug"
- "PITrail"
TFTPServer.StartTransfer Event
TBD.
Syntax
tftpserver.on('StartTransfer', listener: (e: {readonly connectionId: string, readonly direction: number}) => void )
Remarks
TBD.
TFTPServer.Transfer Event
TBD.
Syntax
tftpserver.on('Transfer', listener: (e: {readonly connectionId: string, readonly direction: number, readonly bytesTransferred: number, readonly percentDone: number, readonly text: string, readonly textB: Uint8Array}) => void )
Remarks
TBD.
TFTPConnection Type
TBD.
Remarks
TBD.
Fields
ConnId string |
TBD |
LocalFile string |
TBD.(Its default value is "". ). |
RemoteFile string |
TBD.(The field is read-only. Its default value is "". ). |
RemoteHost string |
TBD.(The field is read-only. Its default value is "". ). |
RemotePort number |
TBD.(The field is read-only. Its default value is 0. ). |
TransferMode string |
TBD.(The field is read-only. Its default value is "". ). |
Constructors
public TFTPConnection();
Configuration Settings (class ipworks.tftpserver)
The class accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.UDPPort Configuration Settings | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CaptureIPPacketInfo:
Used to capture the packet information.If this is set to true, the component will capture the IP packet information.
The default value for this setting is False. Note: This setting is only available in Windows. |
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DelayHostResolution:
Whether the hostname is resolved when RemoteHost is set.This setting specifies whether a hostname is resolved immediately when RemoteHost is set. If true the class will resolve the hostname and the IP address will be present in the RemoteHost property.
If false, the hostname is not resolved until needed by the component when a method to connect or send data is called. If desired, ResolveRemoteHost may called to manually resolve the value in RemoteHost at any time.
The default value is false. |
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DestinationAddress:
Used to get the destination address from the packet information.If CaptureIPPacketInfo is set to true, then this will be populated with the packet's destination address when a packet is received.
This information will be accessible in the DataIn event.
Note: This setting is only available in Windows. |
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DontFragment: Used to set the Don't Fragment flag of outgoing packets.When set to True, packets sent by the class will have the Don't Fragment flag set. The default value is False. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
LocalHost:
The name of the local host through which connections are initiated or accepted.
The LocalHost setting contains the name of the local host
as obtained by the gethostname() system call, or if the
user has assigned an IP address, the value of that address.
In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface. If the class is connected, the LocalHost setting shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface). |
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LocalPort:
The port in the local host where the class binds.
This must be set before a connection is
attempted. It instructs the class to bind to a specific
port (or communication endpoint) in the local machine.
Setting this to 0 (default) enables the system to choose a port at random. The chosen port will be shown by LocalPort after the connection is established. LocalPort cannot be changed once a connection is made. Any attempt to set this when a connection is active will generate an error. This; setting is useful when trying to connect to services that require a trusted port in the client side. An example is the remote shell (rsh) service in UNIX systems. |
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MaxPacketSize: The maximum length of the packets that can be received.This setting specifies the maximum size of the datagrams that the class will accept without truncation. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
QOSDSCPValue:
Used to specify an arbitrary QOS/DSCP setting (optional).UseConnection must be True to use this setting. This option allows you to specify an arbitrary DSCP value
between 0 and 63. The default is 0. When set to the default value the component will not set a DSCP value.
Note: This setting uses the qWAVE API is only available on Windows 7, Windows Server 2008 R2, and later. |
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QOSTrafficType:
Used to specify QOS/DSCP settings (optional).UseConnection must be True to use this setting.
You may specify either the text or integer values: BestEffort (0), Background (1), ExcellentEffort (2), AudioVideo (3), Voice (4), and Control (5).
Note: This setting uses the qWAVE API which is only available on Windows Vista and Windows Server 2008 or above. Note: QOSTrafficType must be set before setting Active to true. |
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ShareLocalPort:
If set to True, allows more than one instance of the class to be active on the same local port.This option must be set before the class is activated through
the Active property or it will have no effect.
The default value for this setting is False. |
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UseConnection:
Determines whether to use a connected socket.UseConnection specifies whether the class
should use a connected socket or not. The connection is
defined as an association in between the local address/port
and the remote address/port. As such, this
is not a connection in the traditional TCP sense. What it
means is only that the class will send and receive data
only to and from the specified destination.
The default value for this setting is False. |
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UseIPv6: Whether or not to use IPv6.By default, the component expects an IPv4 address for local and remote host properties, and will create an IPv4 socket. To use IPv6 instead, set this to True. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Socket Configuration Settings | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
AbsoluteTimeout:
Determines whether timeouts are inactivity timeouts or absolute timeouts.If AbsoluteTimeout is set to True, any method which does not complete within Timeout seconds
will be aborted. By default, AbsoluteTimeout is False, and the timeout is an inactivity timeout.
Note: This option is not valid for UDP ports. |
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FirewallData: Used to send extra data to the firewall.When the firewall is a tunneling proxy, use this property to send custom (additional) headers to the firewall (e.g. headers for custom authentication schemes). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
InBufferSize:
The size in bytes of the incoming queue of the socket.
This is the size of an internal queue in the TCP/IP stack.
You can increase or decrease its size depending on the amount
of data that you will be receiving. Increasing the value of the
InBufferSize setting can provide significant improvements in
performance in some cases.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the InBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small. |
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OutBufferSize:
The size in bytes of the outgoing queue of the socket.This is the size of an internal queue in the TCP/IP stack.
You can increase or decrease its size depending on the amount
of data that you will be sending. Increasing the value of the
OutBufferSize setting can provide significant improvements in
performance in some cases.
Some TCP/IP implementations do not support variable buffer sizes. If that is the case, when the class is activated the OutBufferSize reverts to its defined size. The same happens if you attempt to make it too large or too small. |
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Base Configuration Settings | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
BuildInfo: Information about the product's build.When queried, this setting will return a string containing information about the product's build. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CodePage:
The system code page used for Unicode to Multibyte translations.The default code page is Unicode UTF-8 (65001).
The following is a list of valid code page identifiers:
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LicenseInfo:
Information about the current license.When queried, this setting will return a string containing information about the license this instance of a class is using. It will return the following information:
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UseInternalSecurityAPI: Tells the class whether or not to use the system security libraries or an internal implementation. By default the class will use the system security libraries to perform cryptographic functions. Setting this to True tells the class to use the internal implementation instead of using the system's security API. |
Trappable Errors (class ipworks.tftpserver)
TFTPServer Errors
122 Packet too large. | |
123 Wrong response type from server. | |
124 Server error. Description contains detailed information. | |
125 Invalid server response. | |
126 A valid LocalFile must be provided for PUT operations. | |
127 Can't open local file. | |
128 Can't write to local file. | |
129 Can't read local file. | |
130 Busy performing the current transfer. | |
301 Timeout while waiting for server. | |
305 Server error. | |
306 Wrong or invalid response type received from server. | |
307 Invalid response from server. |
The class may also return one of the following error codes, which are inherited from other classes.
UDPPort Errors
104 UDPPort is already Active. | |
106 You cannot change the LocalPort while the class is Active. | |
107 You cannot change the LocalHost at this time. A connection is in progress. | |
109 The class must be Active for this operation. | |
112 Cannot change MaxPacketSize while the class is Active. | |
113 Cannot change ShareLocalPort option while the class is Active. | |
114 Cannot change RemoteHost when UseConnection is set and the class Active. | |
115 Cannot change RemotePort when UseConnection is set and the class is Active. | |
116 RemotePort can't be zero when UseConnection is set. Please specify a valid service port number. | |
117 Cannot change UseConnection while the class is Active. | |
118 Message can't be longer than MaxPacketSize. | |
119 Message too short. | |
434 Unable to convert string to selected CodePage |
SSL Errors
270 Cannot load specified security library. | |
271 Cannot open certificate store. | |
272 Cannot find specified certificate. | |
273 Cannot acquire security credentials. | |
274 Cannot find certificate chain. | |
275 Cannot verify certificate chain. | |
276 Error during handshake. | |
280 Error verifying certificate. | |
281 Could not find client certificate. | |
282 Could not find server certificate. | |
283 Error encrypting data. | |
284 Error decrypting data. |
TCP/IP Errors
10004 [10004] Interrupted system call. | |
10009 [10009] Bad file number. | |
10013 [10013] Access denied. | |
10014 [10014] Bad address. | |
10022 [10022] Invalid argument. | |
10024 [10024] Too many open files. | |
10035 [10035] Operation would block. | |
10036 [10036] Operation now in progress. | |
10037 [10037] Operation already in progress. | |
10038 [10038] Socket operation on non-socket. | |
10039 [10039] Destination address required. | |
10040 [10040] Message too long. | |
10041 [10041] Protocol wrong type for socket. | |
10042 [10042] Bad protocol option. | |
10043 [10043] Protocol not supported. | |
10044 [10044] Socket type not supported. | |
10045 [10045] Operation not supported on socket. | |
10046 [10046] Protocol family not supported. | |
10047 [10047] Address family not supported by protocol family. | |
10048 [10048] Address already in use. | |
10049 [10049] Can't assign requested address. | |
10050 [10050] Network is down. | |
10051 [10051] Network is unreachable. | |
10052 [10052] Net dropped connection or reset. | |
10053 [10053] Software caused connection abort. | |
10054 [10054] Connection reset by peer. | |
10055 [10055] No buffer space available. | |
10056 [10056] Socket is already connected. | |
10057 [10057] Socket is not connected. | |
10058 [10058] Can't send after socket shutdown. | |
10059 [10059] Too many references, can't splice. | |
10060 [10060] Connection timed out. | |
10061 [10061] Connection refused. | |
10062 [10062] Too many levels of symbolic links. | |
10063 [10063] File name too long. | |
10064 [10064] Host is down. | |
10065 [10065] No route to host. | |
10066 [10066] Directory not empty | |
10067 [10067] Too many processes. | |
10068 [10068] Too many users. | |
10069 [10069] Disc Quota Exceeded. | |
10070 [10070] Stale NFS file handle. | |
10071 [10071] Too many levels of remote in path. | |
10091 [10091] Network subsystem is unavailable. | |
10092 [10092] WINSOCK DLL Version out of range. | |
10093 [10093] Winsock not loaded yet. | |
11001 [11001] Host not found. | |
11002 [11002] Non-authoritative 'Host not found' (try again or check DNS setup). | |
11003 [11003] Non-recoverable errors: FORMERR, REFUSED, NOTIMP. | |
11004 [11004] Valid name, no data record (check DNS setup). |