def v2ToV1(v2Pdu, origV1Pdu=None): debug.logger & debug.FLAG_PRX and debug.logger( 'v2ToV1: v2Pdu %s' % v2Pdu.prettyPrint()) pduType = v2Pdu.tagSet if pduType in V2_TO_V1_PDU_MAP: v1Pdu = V2_TO_V1_PDU_MAP[pduType].clone() else: raise error.ProtocolError('Unsupported PDU type') v2VarBinds = v2c.apiPDU.getVarBinds(v2Pdu) v1VarBinds = [] zeroInt = v1.Integer(0) # 3.2 if pduType in rfc3411.NOTIFICATION_CLASS_PDUS: if len(v2VarBinds) < 2: raise error.ProtocolError( 'SNMP v2c TRAP PDU requires at least two var-binds') # 3.2.1 snmpTrapOID, snmpTrapOIDParam = v2VarBinds[1] if snmpTrapOID != v2c.apiTrapPDU.snmpTrapOID: raise error.ProtocolError('Second OID not snmpTrapOID') if snmpTrapOIDParam in V2_TO_V1_TRAP_MAP: for oid, val in v2VarBinds: if oid == v2c.apiTrapPDU.snmpTrapEnterprise: v1.apiTrapPDU.setEnterprise(v1Pdu, val) break else: # snmpTraps v1.apiTrapPDU.setEnterprise(v1Pdu, (1, 3, 6, 1, 6, 3, 1, 1, 5)) else: if snmpTrapOIDParam[-2] == 0: v1.apiTrapPDU.setEnterprise(v1Pdu, snmpTrapOIDParam[:-2]) else: v1.apiTrapPDU.setEnterprise(v1Pdu, snmpTrapOIDParam[:-1]) # 3.2.2 for oid, val in v2VarBinds: # snmpTrapAddress if oid == v2c.apiTrapPDU.snmpTrapAddress: # v2c.OctetString is more constrained v1.apiTrapPDU.setAgentAddr(v1Pdu, v1.IpAddress(val)) break else: v1.apiTrapPDU.setAgentAddr(v1Pdu, v1.IpAddress('0.0.0.0')) # 3.2.3 if snmpTrapOIDParam in V2_TO_V1_TRAP_MAP: v1.apiTrapPDU.setGenericTrap( v1Pdu, V2_TO_V1_TRAP_MAP[snmpTrapOIDParam]) else: v1.apiTrapPDU.setGenericTrap(v1Pdu, 6) # 3.2.4 if snmpTrapOIDParam in V2_TO_V1_TRAP_MAP: v1.apiTrapPDU.setSpecificTrap(v1Pdu, zeroInt) else: v1.apiTrapPDU.setSpecificTrap(v1Pdu, snmpTrapOIDParam[-1]) # 3.2.5 v1.apiTrapPDU.setTimeStamp(v1Pdu, v2VarBinds[0][1]) __v2VarBinds = [] for oid, val in v2VarBinds[2:]: if (oid in V2_TO_V1_TRAP_MAP or oid in (v2c.apiTrapPDU.sysUpTime, v2c.apiTrapPDU.snmpTrapAddress, v2c.apiTrapPDU.snmpTrapEnterprise)): continue __v2VarBinds.append((oid, val)) v2VarBinds = __v2VarBinds # 3.2.6 --> done below else: v1.apiPDU.setErrorStatus(v1Pdu, zeroInt) v1.apiPDU.setErrorIndex(v1Pdu, zeroInt) if pduType in rfc3411.RESPONSE_CLASS_PDUS: idx = len(v2VarBinds) - 1 while idx >= 0: # 4.1.2.1 oid, val = v2VarBinds[idx] if v2c.Counter64.tagSet == val.tagSet: if origV1Pdu.tagSet == v1.GetRequestPDU.tagSet: v1.apiPDU.setErrorStatus(v1Pdu, 2) v1.apiPDU.setErrorIndex(v1Pdu, idx + 1) break elif origV1Pdu.tagSet == v1.GetNextRequestPDU.tagSet: raise error.StatusInformation(idx=idx, pdu=v2Pdu) else: raise error.ProtocolError('Counter64 on the way') # 4.1.2.2.1&2 if val.tagSet in (v2c.NoSuchObject.tagSet, v2c.NoSuchInstance.tagSet, v2c.EndOfMibView.tagSet): v1.apiPDU.setErrorStatus(v1Pdu, 2) v1.apiPDU.setErrorIndex(v1Pdu, idx + 1) idx -= 1 # 4.1.2.3.1 v2ErrorStatus = v2c.apiPDU.getErrorStatus(v2Pdu) if v2ErrorStatus: v1.apiPDU.setErrorStatus( v1Pdu, V2_TO_V1_ERROR_MAP.get(v2ErrorStatus, 5)) v1.apiPDU.setErrorIndex(v1Pdu, v2c.apiPDU.getErrorIndex(v2Pdu, muteErrors=True)) elif pduType in rfc3411.CONFIRMED_CLASS_PDUS: v1.apiPDU.setErrorStatus(v1Pdu, 0) v1.apiPDU.setErrorIndex(v1Pdu, 0) # Translate Var-Binds if (pduType in rfc3411.RESPONSE_CLASS_PDUS and v1.apiPDU.getErrorStatus(v1Pdu)): v1VarBinds = v1.apiPDU.getVarBinds(origV1Pdu) else: for oid, v2Val in v2VarBinds: v1VarBinds.append( (oid, V2_TO_V1_VALUE_MAP[v2Val.tagSet].clone(v2Val)) ) if pduType in rfc3411.NOTIFICATION_CLASS_PDUS: v1.apiTrapPDU.setVarBinds(v1Pdu, v1VarBinds) else: v1.apiPDU.setVarBinds(v1Pdu, v1VarBinds) v1.apiPDU.setRequestID( v1Pdu, v2c.apiPDU.getRequestID(v2Pdu) ) debug.logger & debug.FLAG_PRX and debug.logger( 'v2ToV1: v1Pdu %s' % v1Pdu.prettyPrint()) return v1Pdu
# 2.1.1 __v1ToV2ValueMap = { v1.Integer.tagSet: v2c.Integer32(), v1.OctetString.tagSet: v2c.OctetString(), v1.Null.tagSet: v2c.Null(), v1.ObjectIdentifier.tagSet: v2c.ObjectIdentifier(), v1.IpAddress.tagSet: v2c.IpAddress(), v1.Counter.tagSet: v2c.Counter32(), v1.Gauge.tagSet: v2c.Gauge32(), v1.TimeTicks.tagSet: v2c.TimeTicks(), v1.Opaque.tagSet: v2c.Opaque() } __v2ToV1ValueMap = { # XXX do not re-create same-type items? v2c.Integer32.tagSet: v1.Integer(), v2c.OctetString.tagSet: v1.OctetString(), v2c.Null.tagSet: v1.Null(), v2c.ObjectIdentifier.tagSet: v1.ObjectIdentifier(), v2c.IpAddress.tagSet: v1.IpAddress(), v2c.Counter32.tagSet: v1.Counter(), v2c.Gauge32.tagSet: v1.Gauge(), v2c.TimeTicks.tagSet: v1.TimeTicks(), v2c.Opaque.tagSet: v1.Opaque() } # PDU map __v1ToV2PduMap = { v1.GetRequestPDU.tagSet: v2c.GetRequestPDU(), v1.GetNextRequestPDU.tagSet: v2c.GetNextRequestPDU(),
# 2.1.1 V1_TO_V2_VALUE_MAP = { v1.Integer.tagSet: v2c.Integer32(), v1.OctetString.tagSet: v2c.OctetString(), v1.Null.tagSet: v2c.Null(), v1.ObjectIdentifier.tagSet: v2c.ObjectIdentifier(), v1.IpAddress.tagSet: v2c.IpAddress(), v1.Counter.tagSet: v2c.Counter32(), v1.Gauge.tagSet: v2c.Gauge32(), v1.TimeTicks.tagSet: v2c.TimeTicks(), v1.Opaque.tagSet: v2c.Opaque() } V2_TO_V1_VALUE_MAP = { # XXX do not re-create same-type items? v2c.Integer32.tagSet: v1.Integer(), v2c.OctetString.tagSet: v1.OctetString(), v2c.Null.tagSet: v1.Null(), v2c.ObjectIdentifier.tagSet: v1.ObjectIdentifier(), v2c.IpAddress.tagSet: v1.IpAddress(), v2c.Counter32.tagSet: v1.Counter(), v2c.Gauge32.tagSet: v1.Gauge(), v2c.TimeTicks.tagSet: v1.TimeTicks(), v2c.Opaque.tagSet: v1.Opaque() } # PDU map V1_TO_V2_PDU_MAP = { v1.GetRequestPDU.tagSet: v2c.GetRequestPDU(), v1.GetNextRequestPDU.tagSet: v2c.GetNextRequestPDU(),