public void ManuallyVerifyErrorMessages()
{
Byte temp;
Byte[] packet = new Byte[256];
List <Byte> oidList = new List <Byte>();
Snmp.ParseOid("1.2.3.4.5.6.7", oidList);
Snmp.SerializeGet(packet, 0, "public", 0, oidList);
SnmpPacket snmpPacket = new SnmpPacket();
//
// Test that this is a valid packet
//
snmpPacket.Deserialize(packet, 0);
//
// Invalid ASN.1 Type
//
temp = packet[0];
packet[0] = 0; // Should be ASN.1 Sequence
try
{
snmpPacket.Deserialize(packet, 0);
Assert.Fail("Expected exception that did not occur");
}
catch (FormatException e) { Console.WriteLine("Caught exception for invalid packet type: '{0}'", e.Message); }
packet[0] = temp;
//
// Truncated packet
//
Byte[] packetTooSmall = new Byte[10];
packetTooSmall[0] = Asn1.TYPE_SEQUENCE;
packetTooSmall[1] = 100;
try
{
snmpPacket.Deserialize(packetTooSmall, 0);
Assert.Fail("Expected exception that did not occur");
}
catch (FormatException e) { Console.WriteLine("Caught exception for truncated packet: '{0}'", e.Message); }
//
// Invalid Version Type
//
temp = packet[2];
packet[2] = Asn1.TYPE_NULL;
try
{
snmpPacket.Deserialize(packet, 0);
Assert.Fail("Expected exception that did not occur");
}
catch (FormatException e) { Console.WriteLine("Caught exception for invalid snmp version type: '{0}'", e.Message); }
packet[2] = temp;
//
// Invalid Community Type
//
temp = packet[5];
packet[5] = Asn1.TYPE_INTEGER;
try
{
snmpPacket.Deserialize(packet, 0);
Assert.Fail("Expected exception that did not occur");
}
catch (FormatException e) { Console.WriteLine("Caught exception for invalid community type: '{0}'", e.Message); }
packet[5] = temp;
}
static Int32 Main(String[] args)
{
Options options = new Options();
List <String> nonOptionArgs = options.Parse(args);
if (nonOptionArgs.Count == 0)
{
options.PrintUsage();
return(1);
}
String command = nonOptionArgs[0];
if (nonOptionArgs.Count < 3)
{
return(options.ErrorAndUsage("Error: Missing command line arguments"));
}
String hostString = nonOptionArgs[1];
String oidString = nonOptionArgs[2];
IPEndPoint endPoint = EndPoints.ParseIPOrResolveHostWithOptionalPort(hostString, 161, DnsPriority.IPv4ThenIPv6);
List <Byte> oidBytes = new List <Byte>();
Snmp.ParseOid(oidString, oidBytes);
Byte[] oid = oidBytes.ToArray();
if (command.Equals("get", StringComparison.CurrentCultureIgnoreCase))
{
if (nonOptionArgs.Count != 3)
{
return(options.ErrorAndUsage("Error: operation 'get' requires 2 arguments but there are {0}", nonOptionArgs.Count - 1));
}
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
Byte[] packet = new Byte[Snmp.MaximumBufferForGet(
(UInt32)options.community.ArgValue.Length, (UInt32)oid.Length)];
UInt32 snmpContentLength = Snmp.SerializeGet(packet, 0, options.community.ArgValue, Snmp.NextID(), oid);
socket.SendTo(packet, (Int32)snmpContentLength, 0, endPoint);
}
else if (command.Equals("set", StringComparison.CurrentCultureIgnoreCase))
{
if (nonOptionArgs.Count != 5)
{
return(options.ErrorAndUsage("Error: operation 'set' requires 4 arguments but there are {0}", nonOptionArgs.Count - 1));
}
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
Byte[] value = Asn1.ParseValue(nonOptionArgs[3], nonOptionArgs[4]);
Byte[] packet = new Byte[Snmp.MaximumBufferForSet(
(UInt32)options.community.ArgValue.Length, (UInt32)oid.Length, (UInt32)value.Length)];
UInt32 snmpContentLength = Snmp.SerializeSet(packet, 0, options.community.ArgValue, Snmp.NextID(), oid, value);
socket.SendTo(packet, (Int32)snmpContentLength, 0, endPoint);
}
else
{
Console.WriteLine("Error: Unknown operation '{0}'", command);
return(1);
}
return(0);
}
