Hi,
I have extended the UCD-SNMP agent with a MIB module. The vp->magic appears
to be 1 less than what it should be, which causes the value of object above
it to be returned. Following is Code of the variable structure, definition
of the magic numbers from the header file and in the end i'll describe the
unusual behavior.
struct variable7 sPlc_variables[] = {
{ _infoHardwareVersion, ASN_OCTET_STR, RONLY, var_alpsPlc, 2,
{1,1} },
{ _infoFirmwareVersion, ASN_OCTET_STR, RONLY, var_alpsPlc, 2,
{1,2} },
{ _infoBuildDate, ASN_OCTET_STR, RONLY, var_alpsPlc, 2, {1,3} },
{ _infoFlashParamsNotSaved, ASN_INTEGER, RONLY, var_alpsPlc, 2,
{1,4} },
{ _infoFlashChanged, ASN_INTEGER, RONLY, var_alpsPlc, 2,
{1,5} },
{ _nodeType, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,1,1}
},
{ _freqBand, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,1,2}
},
{ _customFreqBandIdx, ASN_INTEGER, RONLY,
var_alpscustomFreqBandTable, 5, {2,1,3,1,1} },
{ _customFreqBandCenterFreq, ASN_INTEGER, RWRITE,
var_alpscustomFreqBandTable, 5, {2,1,3,1,2} },
{ _customFreqBandBandwidth, ASN_INTEGER, RWRITE,
var_alpscustomFreqBandTable, 5, {2,1,3,1,3} },
{ _customFreqBandRowStatus, ASN_INTEGER, RWRITE,
var_alpscustomFreqBandTable, 5, {2,1,3,1,4} },
{ _preferredBandTimeout, ASN_INTEGER, RWRITE, var_alpsPlc, 3,
{2,1,4} },
{ _powerMask30, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,1,5}
},
{ _powerMaskIARU, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,1,6}
},
{ _agcTxEnable, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,1,7,1} },
{ _agcRxEnable, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,1,7,2} },
{ _agcTxGain, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,1,7,3} },
{ _agcRxGain, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,1,7,4} },
{ _masterSelectionEnable, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,1,8,1} },
{ _masterSelectionCriteria, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,1,8,2} },
{ _masterSelectionNumOfHops, ASN_INTEGER, RWRITE, var_alpsPlc,
4, {2,1,8,3} },
{ _masterSelectionFixed, ASN_OCTET_STR, RWRITE, var_alpsPlc, 4,
{2,1,8,4} },
{ _firmwareUpgradeURL, ASN_OCTET_STR, RWRITE, var_alpsPlc, 4,
{2,2,1,1} },
{ _configFileDownloadURL, ASN_OCTET_STR, RWRITE, var_alpsPlc, 4,
{2,2,1,2} },
{ _configFileUploadURL, ASN_OCTET_STR, RWRITE, var_alpsPlc, 4,
{2,2,1,3} },
{ _saveParamsInFlash, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,2,2,1} },
{ _restoreFactoryDefaults, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,2,2,2} },
{ _upgradeFirmware, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,2,2,3} },
{ _upgradeCongFile, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,2,2,4} },
{ _deviceReboot, ASN_INTEGER, RWRITE, var_alpsPlc, 4,
{2,2,2,5} },
{ _vlanEnabled, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,3,1}
},
{ _vlanType, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,3,2}
},
{ _vlanDataID, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,3,3}
},
{ _vlanMgmtID, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,3,4}
},
{ _vlanDataPriority, ASN_INTEGER, RWRITE, var_alpsPlc, 3,
{2,3,5} },
{ _vlanMgmtPriority, ASN_INTEGER, RWRITE, var_alpsPlc, 3,
{2,3,6} },
{ _qosEnabled, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,4,1}
},
{ _qosClass, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,4,2}
},
{ _qosUplinkLimit, ASN_INTEGER, RWRITE, var_alpsPlc, 3, {2,4,3}
},
{ _qosDownlinkLimit, ASN_INTEGER, RWRITE, var_alpsPlc, 3,
{2,4,4} },
{ _aclAdminIdx, ASN_INTEGER, RONLY, var_alpsaclAdminTable, 6,
{2,5,1,1,1,1} },
{ _aclAdminHost, ASN_OCTET_STR, RWRITE, var_alpsaclAdminTable, 6,
{2,5,1,1,1,2} },
{ _aclAdminRowStatus, ASN_INTEGER, RWRITE, var_alpsaclAdminTable,
6, {2,5,1,1,1,3} }
};
#define _infoHardwareVersion 1
#define _infoFirmwareVersion 2
#define _infoBuildDate 3
#define _infoFlashParamsNotSaved 4
#define _infoFlashChanged 5
#define _nodeType 6
#define _freqBand 7
#define _preferredBandTimeout 12
#define _powerMask30 13
#define _powerMaskIARU 14
#define _agcTxEnable 15
#define _agcRxEnable 16
#define _agcTxGain 17
#define _agcRxGain 18
#define _masterSelectionEnable 19
#define _masterSelectionCriteria 20
#define _masterSelectionNumOfHops 21
#define _masterSelectionFixed 22
#define _firmwareUpgradeURL 23
#define _configFileDownloadURL 24
#define _configFileUploadURL 25
#define _saveParamsInFlash 26
#define _restoreFactoryDefaults 27
#define _upgradeFirmware 28
#define _upgradeCongFile 29
#define _deviceReboot 30
#define _vlanEnabled 31
#define _vlanType 32
#define _vlanDataID 33
#define _vlanMgmtID 34
#define _vlanDataPriority 35
#define _vlanMgmtPriority 36
#define _qosEnabled 37
#define _qosClass 38
#define _qosUplinkLimit 39
#define _qosDownlinkLimit 40
#define CONF_customFreqBandIdx 1
#define CONF_customFreqBandCenterFreq 2
#define CONF_customFreqBandBandwidth 3
#define CONF_customFreqBandRowStatus 4
#define CONF_aclAdminIdx 1
#define CONF_aclAdminHost 2
#define CONF_aclAdminRowStatus 3
The location where this module is registered within the MIB tree is: oid
sPlc_variables_oid[] = { 1,3,6,1,4,1,188,11,10 };
If I print the value of vp->magic from the method: search_subtree_vars() in
the File: snmp_vars.c, will return 29 for the Object deviceReboot, whose
actual magic number is 30. Its similar with all the objects above the Object
deviceReboot but it returns correct value for the Objects that are below it.
I also printed the vp->magic from within my variable handling routine but
the behavior is the same. Does anyone has an idea why this is happening?
Thank you for your time!
Shuaib
--
MSc in Communication Systems
I&C Faculty
EPFL
Switzerland
Home page: http://shuaibe.googlepages.com/
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