/// <inheritdoc />
public override IDeviceHandler CreateHandler(ISnmpLowerLayer lowerLayer, IQuerierOptions options)
{
string osVersionString = null;
// try #1: In IEEE SNMP tree
try
{
osVersionString = lowerLayer.QueryAsString(OsVersionOid, "MikroTik RouterOS Version String #1");
}
catch (SnmpException ex)
{
this.CollectException("MtikSnmp: Getting version string", ex);
osVersionString = null;
}
catch (HamnetSnmpException ex)
{
this.CollectException("MtikSnmp: Getting version string", ex);
osVersionString = null;
}
// try #2: Withing MikroTik enterprise tree
if (string.IsNullOrWhiteSpace(osVersionString))
{
osVersionString = lowerLayer.QueryAsString(OsVersionOid2, "MikroTik RouterOS Version String #2");
}
// Example: "RouterOS 6.45.3 (stable) on RB711-5Hn-MMCX"
Match match = OsVersionExtractionRegex.Match(osVersionString);
SemanticVersion osVersion = match.Success ? match.Groups[1].Value.ToSemanticVersion() : null;
var model = lowerLayer.SystemData.Description.Replace(RouterOsDetectionString, string.Empty).Trim();
log.Info($"Detected device '{lowerLayer.Address}' as MikroTik '{model}' v '{osVersion}'");
DeviceVersion deviceVersion;
IDeviceSpecificOidLookup oidTable = this.ObtainOidTable(model.Trim(), osVersion, out deviceVersion, lowerLayer.Address);
if (string.IsNullOrWhiteSpace(deviceVersion.HandlerClassName))
{
try
{
return(new MikrotikSnmpDeviceHandler(lowerLayer, oidTable, osVersion, model, options));
}
catch (Exception ex)
{
this.CollectException("MtikSnmp: OID table lookup", ex);
// we want to catch and nest the exception here as the APIs involved are not able to append the infomration for which
// device (i.e. IP address) the exception is for
throw new HamnetSnmpException($"Failed to create MikroTik handler for device '{lowerLayer.Address}': {ex.Message}", ex, lowerLayer.Address?.ToString());
}
}
else
{
return(this.GetHandlerViaReflection(deviceVersion.HandlerClassName, lowerLayer, oidTable, osVersion, model, options));
}
}
