The SimpleSNMP Program

using System;
using System.Text;
class SimpleSNMP
{
  public static void Main(string[] argv)
  {
   int commlength, miblength, datatype, datalength, datastart;
   int uptime = 0;
   string output;
   SNMP conn = new SNMP();
   byte[] response = new byte[1024];
   Console.WriteLine("Device SNMP information:");
   // Send sysName SNMP request and get the response
   response = conn.get("get", argv[0], argv[1], "1.3.6.1.2.1.1.5.0");
   if (response[0] == 0xff)
   {
     Console.WriteLine("No response from {0}", argv[0]);
     return;
   }
   // Get the community name and MIB lengths from the packet
   commlength = Convert.ToInt16(response[6]);
   miblength = Convert.ToInt16(response[23 + commlength]);
   // Extract the MIB data from the SNMP response
   datatype = Convert.ToInt16(response[24 + commlength + miblength]);
   datalength = Convert.ToInt16(response[25 + commlength + miblength]);
   datastart = 26 + commlength + miblength;
   output = Encoding.ASCII.GetString(response, datastart, datalength);
   Console.WriteLine(" sysName - Datatype: {0}, Value: {1}",
       datatype, output);
   // Send a sysLocation SNMP request
   response = conn.get("get", argv[0], argv[1], "1.3.6.1.2.1.1.6.0");
   if (response[0] == 0xff)
   {
     Console.WriteLine("No response from {0}", argv[0]);
     return;
   }
   // Get the community name and MIB lengths from the response
   commlength = Convert.ToInt16(response[6]);
   miblength = Convert.ToInt16(response[23 + commlength]);
   // Extract the MIB data from the SNMP response
   datatype = Convert.ToInt16(response[24 + commlength + miblength]);
   datalength = Convert.ToInt16(response[25 + commlength + miblength]);
   datastart = 26 + commlength + miblength;
   output = Encoding.ASCII.GetString(response, datastart, datalength);
   Console.WriteLine(" sysLocation - Datatype: {0}, Value: {1}",
     datatype, output);
   // Send a sysContact SNMP request
   response = conn.get("get", argv[0], argv[1], "1.3.6.1.2.1.1.4.0");
   if (response[0] == 0xff)
   {
     Console.WriteLine("No response from {0}", argv[0]);
     return;
   }
   // Get the community and MIB lengths
   commlength = Convert.ToInt16(response[6]);
   miblength = Convert.ToInt16(response[23 + commlength]);
   // Extract the MIB data from the SNMP response
   datatype = Convert.ToInt16(response[24 + commlength + miblength]);
   datalength = Convert.ToInt16(response[25 + commlength + miblength]);
   datastart = 26 + commlength + miblength;
   output = Encoding.ASCII.GetString(response, datastart, datalength);
   Console.WriteLine(" sysContact - Datatype: {0}, Value: {1}",
       datatype, output);
   
   // Send a SysUptime SNMP request
   response = conn.get("get", argv[0], argv[1], "1.3.6.1.2.1.1.3.0");
   if (response[0] == 0xff)
   {
     Console.WriteLine("No response from {0}", argv[0]);
     return;
   }
   // Get the community and MIB lengths of the response
   commlength = Convert.ToInt16(response[6]);
   miblength = Convert.ToInt16(response[23 + commlength]);
   // Extract the MIB data from the SNMp response
   datatype = Convert.ToInt16(response[24 + commlength + miblength]);
   datalength = Convert.ToInt16(response[25 + commlength + miblength]);
   datastart = 26 + commlength + miblength;
   // The sysUptime value may by a multi-byte integer
   // Each byte read must be shifted to the higher byte order
   while(datalength > 0)
   {
     uptime = (uptime << 8) + response[datastart++];
     datalength—;
   }
   Console.WriteLine(" sysUptime - Datatype: {0}, Value: {1}",
       datatype, uptime);
  }
}