Agentuino - A lightweight SNMP Agent

#include <Agentuino.h>

#include <Agentuino.h>

/**
* Agentuino SNMP Agent Library Prototyping...
*
* Copyright 2010 Eric C. Gionet <lavco_eg@hotmail.com>
*
*/
#include <Streaming.h>         // Include the Streaming library
#include <Ethernet.h>          // Include the Ethernet library
#include <MemoryFree.h>
#include <Agentuino.h>
#include <avr/pgmspace.h>
//
static byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
static byte ip[] = { 192, 168, 2, 64 };
static byte gateway[] = { 192, 168, 1, 190 };
static byte subnet[] = { 255, 255, 255, 0 };
//
//
// RFC1213-MIB OIDs
static char sysDescr[] PROGMEM      = "1.3.6.1.2.1.1.1.0";  // read-only  DisplayString
static char sysObjectID[] PROGMEM   = "1.3.6.1.2.1.1.2.0";  // read-only  (ObjectIdentifier)
static char sysUpTime[] PROGMEM     = "1.3.6.1.2.1.1.3.0";  // read-only  (TimeTicks)
static char sysContact[] PROGMEM    = "1.3.6.1.2.1.1.4.0";  // read-write (DisplayString)
static char sysName[] PROGMEM       = "1.3.6.1.2.1.1.5.0";  // read-write (DisplayString)
static char sysLocation[] PROGMEM   = "1.3.6.1.2.1.1.6.0";  // read-write (DisplayString)
static char sysServices[] PROGMEM   = "1.3.6.1.2.1.1.7.0";  // read-only  (Integer)
//
//
/* RFC1213 local values */
static char locDescr[] PROGMEM      = { "Agentuino, a light-weight SNMP Agent." };  // read-only (static)
static char locObjectID[] PROGMEM   = "1.3.6.1.3.2009.0";                       // read-only (static)
static long locUpTime               = 0;                                        // RTC is needed for this unless the NTP Time library is used
static char locContact[20]          = "Eric Gionet";
static char locName[20]             = "Agentuino";
static char locLocation[20]         = "Nova Scotia, CA";
static short locServices PROGMEM    = 7;                                        // read-only (static)

AgentuinoClass agent = Agentuino();

SNMP_SESSION session;


void pduReceived()
{
  char oidString[SNMP_MAX_OID_LEN];
  SNMP_PDU pdu;
  //
  Serial << "UDP Packet Received Start.." << " RAM:" << freeMemory() << endl;
  //
  agent.requestPdu(&pdu);
  //
  pdu.OID.toString(oidString);
  //
  Serial << "OID: " << oidString << endl;
  //
  if ( pdu.type == SNMP_PDU_GET || pdu.type == SNMP_PDU_GET_NEXT ) {
    //
    if ( strcmp_P(oidString, sysName) == 0 ) {
      //
      // response packet - locName
      pdu.type = SNMP_PDU_RESPONSE;
      pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locName);
      //
      Serial << "sysName..." << locName << " " << pdu.VALUE.size << endl;
      //
      agent.responsePdu(&pdu);
    } else {
      // oid does not exist
      //
      // response packet - object not found
    }
  }
  //
  agent.freePdu(&pdu);
}

void setup()
{
  Serial.begin(9600);
  Ethernet.begin(mac, ip);
  //
  session.getCommName = "public";
  session.setCommName = "private";
  session.port = 161;
  //
  agent.initSession(&session);
  agent.onPduReceive(pduReceived);
  //
  delay(10);
  //
  Serial.println("Initalized...");
}

void loop()
{
  agent.listen();
}