snmp.cpp

00001 /**
00002 * Agentbed SNMP Server
00003 *  Modified for mbed, 2011 Suga.
00004 *
00005 * Agentuino SNMP Agent Library Prototyping...
00006 * Copyright 2010 Eric C. Gionet <lavco_eg@hotmail.com>
00007 */
00008 #include "mbed.h"
00009 #include "Agentbed.h"
00010 #include "EthernetNetIf.h"
00011 #include "ConfigFile.h"
00012 #include "conf.h"
00013 
00014 AgentbedClass Agentbed;
00015 
00016 // RFC1213-MIB OIDs
00017 // .iso (.1)
00018 // .iso.org (.1.3)
00019 // .iso.org.dod (.1.3.6)
00020 // .iso.org.dod.internet (.1.3.6.1)
00021 // .iso.org.dod.internet.mgmt (.1.3.6.1.2)
00022 // .iso.org.dod.internet.mgmt.mib-2 (.1.3.6.1.2.1)
00023 // .iso.org.dod.internet.mgmt.mib-2.system (.1.3.6.1.2.1.1)
00024 // .iso.org.dod.internet.mgmt.mib-2.system.sysDescr (.1.3.6.1.2.1.1.1)
00025 const char sysDescr[]    = "1.3.6.1.2.1.1.1.0";  // read-only  (DisplayString)
00026 // .iso.org.dod.internet.mgmt.mib-2.system.sysObjectID (.1.3.6.1.2.1.1.2)
00027 const char sysObjectID[] = "1.3.6.1.2.1.1.2.0";  // read-only  (ObjectIdentifier)
00028 // .iso.org.dod.internet.mgmt.mib-2.system.sysUpTime (.1.3.6.1.2.1.1.3)
00029 const char sysUpTime[]   = "1.3.6.1.2.1.1.3.0";  // read-only  (TimeTicks)
00030 // .iso.org.dod.internet.mgmt.mib-2.system.sysContact (.1.3.6.1.2.1.1.4)
00031 const char sysContact[]  = "1.3.6.1.2.1.1.4.0";  // read-write (DisplayString)
00032 // .iso.org.dod.internet.mgmt.mib-2.system.sysName (.1.3.6.1.2.1.1.5)
00033 const char sysName[]     = "1.3.6.1.2.1.1.5.0";  // read-write (DisplayString)
00034 // .iso.org.dod.internet.mgmt.mib-2.system.sysLocation (.1.3.6.1.2.1.1.6)
00035 const char sysLocation[] = "1.3.6.1.2.1.1.6.0";  // read-write (DisplayString)
00036 // .iso.org.dod.internet.mgmt.mib-2.system.sysServices (.1.3.6.1.2.1.1.7)
00037 const char sysServices[] = "1.3.6.1.2.1.1.7.0";  // read-only  (Integer)
00038 //
00039 // Arduino defined OIDs
00040 // .iso.org.dod.internet.private (.1.3.6.1.4)
00041 // .iso.org.dod.internet.private.enterprises (.1.3.6.1.4.1)
00042 // .iso.org.dod.internet.private.enterprises.arduino (.1.3.6.1.4.1.36582)
00043 const char enterprises[] = "1.3.6.1.4.1.36582.";  // read-only  (Integer)
00044 //
00045 //
00046 // RFC1213 local values
00047 static char locDescr[]              = "mbed Weather Platform";  // read-only (static)
00048 static char locObjectID[]           = "1.3.6.1.4.1.36582";                       // read-only (static)
00049 uint32_t locUpTime           = 0;                                        // read-only (static)
00050 static char locContact[]            = "<root@weather>";                            // should be stored/read from EEPROM - read/write (not done for simplicity)
00051 static char locName[]               = "weather.mbed";                              // should be stored/read from EEPROM - read/write (not done for simplicity)
00052 static char locLocation[]           = "weather";                        // should be stored/read from EEPROM - read/write (not done for simplicity)
00053 static int32_t locServices          = 7;                                        // read-only (static)
00054 
00055 uint32_t prevMillis = 0;
00056 char oid[SNMP_MAX_OID_LEN];
00057 SNMP_API_STAT_CODES api_status;
00058 SNMP_ERR_CODES status;
00059 
00060 extern DigitalOut led_y;
00061 extern Sensor sensor;
00062 
00063 void pduReceived()
00064 {
00065   SNMP_PDU pdu;
00066   //
00067   led_y = 1;
00068   api_status = Agentbed.requestPdu(&pdu);
00069   //
00070   if ( pdu.type == SNMP_PDU_GET || pdu.type == SNMP_PDU_GET_NEXT || pdu.type == SNMP_PDU_SET
00071     && pdu.error == SNMP_ERR_NO_ERROR && api_status == SNMP_API_STAT_SUCCESS ) {
00072     //
00073     pdu.OID.toString(oid);
00074     //
00075     pdu.error = SNMP_ERR_READ_ONLY;
00076     //
00077     if ( strcmp(oid, sysDescr ) == 0 ) {
00078       // handle sysDescr (set/get) requests
00079       if ( pdu.type == SNMP_PDU_GET ) {
00080         // response packet from get-request - locDescr
00081         status = pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locDescr);
00082         pdu.error = status;
00083       }
00084     } else if ( strcmp(oid, sysObjectID ) == 0 ) {
00085       // handle sysName (set/get) requests
00086       if ( pdu.type == SNMP_PDU_GET ) {
00087         // response packet from get-request - locUpTime
00088         status = pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locObjectID);
00089         pdu.error = status;
00090       }
00091     } else if ( strcmp(oid, sysUpTime ) == 0 ) {
00092       // handle sysName (set/get) requests
00093       if ( pdu.type == SNMP_PDU_GET ) {
00094         // response packet from get-request - locUpTime
00095         status = pdu.VALUE.encode(SNMP_SYNTAX_TIME_TICKS, locUpTime);
00096         pdu.error = status;
00097       }
00098     } else if ( strcmp(oid, sysName ) == 0 ) {
00099       // handle sysName (set/get) requests
00100       if ( pdu.type == SNMP_PDU_GET ) {
00101         // response packet from get-request - locName
00102         status = pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locName);
00103         pdu.error = status;
00104       }
00105     } else if ( strcmp(oid, sysContact ) == 0 ) {
00106       // handle sysContact (set/get) requests
00107       if ( pdu.type == SNMP_PDU_GET ) {
00108         // response packet from get-request - locContact
00109         status = pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locContact);
00110         pdu.error = status;
00111       }
00112     } else if ( strcmp(oid, sysLocation ) == 0 ) {
00113       // handle sysLocation (set/get) requests
00114       if ( pdu.type == SNMP_PDU_GET ) {
00115         // response packet from get-request - locLocation
00116         status = pdu.VALUE.encode(SNMP_SYNTAX_OCTETS, locLocation);
00117         pdu.error = status;
00118       }
00119     } else if ( strcmp(oid, sysServices) == 0 ) {
00120       // handle sysServices (set/get) requests
00121       if ( pdu.type == SNMP_PDU_GET ) {
00122         // response packet from get-request - locServices
00123         status = pdu.VALUE.encode(SNMP_SYNTAX_INT, locServices);
00124         pdu.error = status;
00125       }
00126     } else if ( strncmp(oid, enterprises, strlen(enterprises)) == 0 ) {
00127       // handle enterprises (set/get) requests
00128       if ( pdu.type == SNMP_PDU_GET ) {
00129         // response packet from get-request - enterprises
00130         switch (oid[strlen(enterprises)]) {
00131         case '0':
00132             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.pres);
00133             break;
00134         case '1':
00135             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.temp);
00136             break;
00137         case '2':
00138             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.humi);
00139             break;
00140         case '3':
00141             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.anemo);
00142             break;
00143         case '4':
00144             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.vane);
00145             break;
00146         case '5':
00147             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.rain);
00148             break;
00149         case '6':
00150             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.light);
00151             break;
00152         case '7':
00153             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.uv);
00154             break;
00155         case '8':
00156             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.moist);
00157             break;
00158         case '9':
00159             status = pdu.VALUE.encode(SNMP_SYNTAX_OPAQUE_FLOAT, sensor.temp2);
00160             break;
00161         }
00162         pdu.error = status;
00163       }
00164     } else {
00165       // oid does not exist
00166       //
00167       // response packet - object not found
00168       pdu.error = SNMP_ERR_NO_SUCH_NAME;
00169     }
00170     //
00171     pdu.type = SNMP_PDU_RESPONSE;
00172 
00173     Agentbed.responsePdu(&pdu);
00174   }
00175   //
00176   Agentbed.freePdu(&pdu);
00177   //
00178   //Serial << "UDP Packet Received End.." << " RAM:" << freeMemory() << endl;
00179 }