/// <summary>
/// Builds a syslog-compatible message using the information we have available.
/// </summary>
/// <param name="facility">Syslog Facility to transmit message from</param>
/// <param name="priority">Syslog severity level</param>
/// <param name="time">Time stamp for log message</param>
/// <param name="sender">Name of the subsystem sending the message</param>
/// <param name="body">Message text</param>
/// <returns>Byte array containing formatted syslog message</returns>
private byte[] BuildSyslogMessage(SyslogFacility facility, SyslogSeverity priority, DateTime time, string sender, string body)
{
// Get sender machine name
string machine = MachineName + " ";
// Calculate PRI field
int calculatedPriority = (int)facility * 8 + (int)priority;
string pri = "<" + calculatedPriority.ToString(CultureInfo.InvariantCulture) + ">";
string timeToString = time.ToString("MMM dd HH:mm:ss ");
sender = sender + ": ";
string[] strParams = { pri, timeToString, machine, sender, body, Environment.NewLine };
return(Encoding.ASCII.GetBytes(string.Concat(strParams)));
}
/// <summary>
/// Builds a syslog-compatible message using the information we have available.
/// </summary>
/// <param name="facility">Syslog Facility to transmit message from</param>
/// <param name="priority">Syslog severity level</param>
/// <param name="time">Time stamp for log message</param>
/// <param name="sender">Name of the subsystem sending the message</param>
/// <param name="body">Message text</param>
/// <returns>Byte array containing formatted syslog message</returns>
private static byte[] buildSyslogMessage(SyslogFacility facility, SyslogSeverity priority, DateTime time, string sender, string body)
{
// Get sender machine name
string machine = System.Net.Dns.GetHostName() + " ";
// Calculate PRI field
int calculatedPriority = (int)facility * 8 + (int)priority;
string pri = "<" + calculatedPriority.ToString() + ">";
string timeToString = time.ToString("MMM dd HH:mm:ss ");
sender = sender + ": ";
string[] strParams = { pri, timeToString, machine, sender, body };
return(Encoding.ASCII.GetBytes(string.Concat(strParams)));
}
/// <summary>
/// Builds a syslog-compatible message using the information we have available.
/// </summary>
/// <param name="facility">Syslog Facility to transmit message from</param>
/// <param name="priority">Syslog severity level</param>
/// <param name="time">Time stamp for log message</param>
/// <param name="sender">Name of the subsystem sending the message</param>
/// <param name="body">Message text</param>
/// <returns>Byte array containing formatted syslog message</returns>
private byte[] BuildSyslogMessage(SyslogFacility facility, SyslogSeverity priority, DateTime time, string sender, string body)
{
// Get sender machine name
string machine = Dns.GetHostName() + " ";
// Calculate PRI field
int calculatedPriority = (int)facility * 8 + (int)priority;
string pri = "<" + calculatedPriority.ToString(CultureInfo.InvariantCulture) + ">";
string timeToString = time.ToString("MMM dd HH:mm:ss ");
sender = sender + ": ";
if (!String.IsNullOrEmpty(CustomPrefix))
{
body = String.Format("[{0}] {1}", CustomPrefix, body);
}
string[] strParams = { pri, timeToString, machine, sender, body, Environment.NewLine };
return(Encoding.ASCII.GetBytes(string.Concat(strParams)));
}
private static int CalculatePriorityValue(SyslogFacility facility, SyslogSeverity severity)
{
return((int)facility * 8 + (int)severity);
}
/// <summary>Builds rfc-5424 compatible message</summary>
/// <param name="logEvent">The NLog.LogEventInfo</param>
/// <param name="facility">Syslog Facility to transmit message from</param>
/// <param name="severity">Syslog severity level</param>
/// <param name="body">Message text</param>
/// <returns>Byte array containing formatted syslog message</returns>
private byte[] BuildSyslogMessage5424(LogEventInfo logEvent, SyslogFacility facility, SyslogSeverity severity, string body)
{
// Calculate PRI field
var priority = CalculatePriorityValue(facility, severity).ToString(CultureInfo.InvariantCulture);
var version = ProtocolVersion.ToString(CultureInfo.InvariantCulture);
var time = logEvent.TimeStamp.ToString("o");
// Get sender machine name
var machine = Left(MachineName.Render(logEvent), 255);
var sender = Left(Sender.Render(logEvent), 48);
var procId = Left(ProcId.Render(logEvent), 128);
var msgId = Left(MsgId.Render(logEvent), 32);
var headerData = Encoding.ASCII.GetBytes($"<{priority}>{version} {time} {machine} {sender} {procId} {msgId} ");
var structuredData = Encoding.UTF8.GetBytes(StructuredData.Render(logEvent) + " ");
var messageData = Encoding.UTF8.GetBytes(body);
var allData = new List <byte>(headerData.Length + structuredData.Length + _bom.Length + messageData.Length);
allData.AddRange(headerData);
allData.AddRange(structuredData);
allData.AddRange(_bom);
allData.AddRange(messageData);
return(allData.ToArray());
}
/// <summary>Builds rfc-3164 compatible message</summary>
/// <param name="logEvent">The NLog.LogEventInfo</param>
/// <param name="facility">Syslog Facility to transmit message from</param>
/// <param name="severity">Syslog severity level</param>
/// <param name="body">Message text</param>
/// <returns>Byte array containing formatted syslog message</returns>
private byte[] BuildSyslogMessage3164(LogEventInfo logEvent, SyslogFacility facility, SyslogSeverity severity, string body)
{
// Calculate PRI field
var priority = CalculatePriorityValue(facility, severity).ToString(CultureInfo.InvariantCulture);
var time = logEvent.TimeStamp.ToLocalTime().ToString(TimestampFormat, _usCulture);
// Get sender machine name
var machine = MachineName.Render(logEvent);
// Get sender
var sender = Sender.Render(logEvent);
return(Encoding.ASCII.GetBytes($"<{priority}>{time} {machine} {sender}: {body}{Environment.NewLine}"));
}
/// <summary>Builds a syslog-compatible message using the information we have available</summary>
/// <param name="logEvent">The NLog.LogEventInfo</param>
/// <param name="facility">Syslog Facility to transmit message from</param>
/// <param name="priority">Syslog severity level</param>
/// <param name="body">Message text</param>
/// <returns>Byte array containing formatted syslog message</returns>
private byte[] BuildSyslogMessage(LogEventInfo logEvent, SyslogFacility facility, SyslogSeverity priority, string body)
{
switch (Rfc)
{
case RfcNumber.Rfc5424:
return(BuildSyslogMessage5424(logEvent, facility, priority, body));
default:
return(BuildSyslogMessage3164(logEvent, facility, priority, body));
}
}
