public async Task <Variable?> GetV2Async(IPAddress ip, string oid, string community, int retries, int port, TimeSpan timeout)
{
if (ip == null)
{
throw new ArgumentNullException(nameof(ip));
}
if (string.IsNullOrWhiteSpace(oid))
{
throw new ArgumentNullException(nameof(oid));
}
if (!Regex.IsMatch(oid, @"^(([0-9]+)\.)+[0-9]+$"))
{
throw new ArgumentException(oid, nameof(oid));
}
if (port <= 0)
{
throw new ArgumentOutOfRangeException(nameof(port), port.ToString());
}
if (retries <= 0)
{
throw new ArgumentOutOfRangeException(nameof(retries), retries.ToString());
}
if (timeout <= TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException(nameof(timeout), timeout.ToString());
}
var startDate = DateTime.Now;
var snmpType = "GET";
var snmpVersion = "2c";
var attempt = 0;
IEnumerable <Variable> result = new List <Variable>();
while (attempt < retries)
{
try
{
result = await MyMessenger.GetAsync(VersionCode.V2,
new IPEndPoint(ip, port),
new OctetString(community),
new List <Variable> {
new Variable(new ObjectIdentifier(oid))
},
timeout
).ConfigureAwait(false);
break;
}
catch (Exception ex) when(ex is SnmpException || ex is SocketException || ex is OperationCanceledException)
{
await _SnmpLog.LogTransactionAsync(startDate, ip.ToString(), oid, community, snmpType, snmpVersion, ex.GetType().ToString(), ex.Message).ConfigureAwait(false);
++attempt;
if (attempt >= retries)
{
throw;
}
}
}
var type = string.Empty;
var data = string.Empty;
foreach (var res in result)
{
type += res.Data.TypeCode;
data += res.Data.ToString();
}
await _SnmpLog.LogTransactionAsync(startDate, ip.ToString(), oid, community, snmpType, snmpVersion, type, data).ConfigureAwait(false);
return(result.FirstOrDefault());
}