public static void Main(string[] args)
{
string community = "public";
bool showHelp = false;
bool showVersion = false;
VersionCode version = VersionCode.V2; // GET BULK is available in SNMP v2 and above.
int timeout = 1000;
int retry = 0;
Levels level = Levels.Reportable;
string user = string.Empty;
string authentication = string.Empty;
string authPhrase = string.Empty;
string privacy = string.Empty;
string privPhrase = string.Empty;
int maxRepetitions = 10;
int nonRepeaters = 0;
bool dump = false;
OptionSet p = new OptionSet()
.Add("c:", "Community name, (default is public)", delegate (string v) { if (v != null) community = v; })
.Add("l:", "Security level, (default is noAuthNoPriv)", delegate(string v)
{
if (v.ToUpperInvariant() == "NOAUTHNOPRIV")
{
level = Levels.Reportable;
}
else if (v.ToUpperInvariant() == "AUTHNOPRIV")
{
level = Levels.Authentication | Levels.Reportable;
}
else if (v.ToUpperInvariant() == "AUTHPRIV")
{
level = Levels.Authentication | Levels.Privacy | Levels.Reportable;
}
else
{
throw new ArgumentException("no such security mode: " + v);
}
})
.Add("Cn:", "Non-repeaters (default is 0)", delegate(string v) { nonRepeaters = int.Parse(v); })
.Add("Cr:", "Max-repetitions (default is 10)", delegate(string v) { maxRepetitions = int.Parse(v); })
.Add("a:", "Authentication method (MD5 or SHA)", delegate(string v) { authentication = v; })
.Add("A:", "Authentication passphrase", delegate(string v) { authPhrase = v; })
.Add("x:", "Privacy method", delegate(string v) { privacy = v; })
.Add("X:", "Privacy passphrase", delegate(string v) { privPhrase = v; })
.Add("u:", "Security name", delegate(string v) { user = v; })
.Add("h|?|help", "Print this help information.", delegate(string v) { showHelp = v != null; })
.Add("V", "Display version number of this application.", delegate (string v) { showVersion = v != null; })
.Add("d", "Display message dump", delegate(string v) { dump = true; })
.Add("t:", "Timeout value (unit is second).", delegate (string v) { timeout = int.Parse(v) * 1000; })
.Add("r:", "Retry count (default is 0)", delegate (string v) { retry = int.Parse(v); })
.Add("v:", "SNMP version (2 and 3 are currently supported)", delegate (string v)
{
switch (int.Parse(v))
{
case 2:
version = VersionCode.V2;
break;
case 3:
version = VersionCode.V3;
break;
default:
throw new ArgumentException("no such version: " + v);
}
});
if (args.Length == 0)
{
ShowHelp(p);
return;
}
List<string> extra;
try
{
extra = p.Parse(args);
}
catch(OptionException ex)
{
Console.WriteLine(ex.Message);
return;
}
if (showHelp)
{
ShowHelp(p);
return;
}
if (extra.Count < 2)
{
Console.WriteLine("invalid variable number: " + extra.Count);
return;
}
if (showVersion)
{
Console.WriteLine(System.Reflection.Assembly.GetExecutingAssembly().GetName().Version);
return;
}
IPAddress ip;
bool parsed = IPAddress.TryParse(extra[0], out ip);
if (!parsed)
{
foreach (IPAddress address in
Dns.GetHostAddresses(extra[0]).Where(address => address.AddressFamily == AddressFamily.InterNetwork))
{
ip = address;
break;
}
if (ip == null)
{
Console.WriteLine("invalid host or wrong IP address found: " + extra[0]);
return;
}
}
try
{
List<Variable> vList = new List<Variable>();
for (int i = 1; i < extra.Count; i++)
{
Variable test = new Variable(new ObjectIdentifier(extra[i]));
vList.Add(test);
}
IPEndPoint receiver = new IPEndPoint(ip, 161);
if (version != VersionCode.V3)
{
GetBulkRequestMessage message = new GetBulkRequestMessage(0,
version,
new OctetString(community),
nonRepeaters,
maxRepetitions,
vList);
ISnmpMessage response = message.GetResponse(timeout, receiver);
if (response.Pdu().ErrorStatus.ToInt32() != 0) // != ErrorCode.NoError
{
throw ErrorException.Create(
"error in response",
receiver.Address,
response);
}
foreach (Variable variable in response.Pdu().Variables)
{
Console.WriteLine(variable);
}
return;
}
if (string.IsNullOrEmpty(user))
{
Console.WriteLine("User name need to be specified for v3.");
return;
}
IAuthenticationProvider auth = (level & Levels.Authentication) == Levels.Authentication
? GetAuthenticationProviderByName(authentication, authPhrase)
: DefaultAuthenticationProvider.Instance;
IPrivacyProvider priv;
if ((level & Levels.Privacy) == Levels.Privacy)
{
priv = new DESPrivacyProvider(new OctetString(privPhrase), auth);
}
else
{
priv = new DefaultPrivacyProvider(auth);
}
Discovery discovery = Messenger.GetNextDiscovery(SnmpType.GetBulkRequestPdu);
ReportMessage report = discovery.GetResponse(timeout, receiver);
GetBulkRequestMessage request = new GetBulkRequestMessage(VersionCode.V3, Messenger.NextMessageId, Messenger.NextRequestId, new OctetString(user), nonRepeaters, maxRepetitions, vList, priv, Messenger.MaxMessageSize, report);
ISnmpMessage reply = request.GetResponse(timeout, receiver);
if (dump)
{
Console.WriteLine("Request message bytes:");
Console.WriteLine(ByteTool.Convert(request.ToBytes()));
Console.WriteLine("Response message bytes:");
Console.WriteLine(ByteTool.Convert(reply.ToBytes()));
}
if (reply is ReportMessage)
{
if (reply.Pdu().Variables.Count == 0)
{
Console.WriteLine("wrong report message received");
return;
}
var id = reply.Pdu().Variables[0].Id;
if (id != Messenger.NotInTimeWindow)
{
var error = id.GetErrorMessage();
Console.WriteLine(error);
return;
}
// according to RFC 3414, send a second request to sync time.
request = new GetBulkRequestMessage(VersionCode.V3, Messenger.NextMessageId, Messenger.NextRequestId, new OctetString(user), nonRepeaters, maxRepetitions, vList, priv, Messenger.MaxMessageSize, reply);
reply = request.GetResponse(timeout, receiver);
}
else if (reply.Pdu().ErrorStatus.ToInt32() != 0) // != ErrorCode.NoError
{
throw ErrorException.Create(
"error in response",
receiver.Address,
reply);
}
foreach (Variable v in reply.Pdu().Variables)
{
Console.WriteLine(v);
}
}
catch (SnmpException ex)
{
Console.WriteLine(ex);
}
catch (SocketException ex)
{
Console.WriteLine(ex);
}
}
