Split the OIDs into limb and twig parts.
Twig part can be interpreted as a groups or a table.
For each limb (group or table) there is an array with twigs (OIDs within group
or table).
When the limb part is matched, then the group or table function is called for
the twigs part.

Additionally:
--Add the table with temperatures (wrpcTemperatureTable). Any number of
  sensors is supported.
--Add wrpcTemperatureTable to the MIB
--print_oid_verbose can now print parts of OIDs

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Write to the flash, if failed return corresponding error.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Possible to read/write:
-- wrpcPtpConfigApply
-- wrpcPtpConfigDeltaTx
-- wrpcPtpConfigDeltaRx
-- wrpcPtpConfigAlpha
-- wrpcPtpConfigSfpPn

setting a value writeToMemoryCurrentSfp to the wrpcPtpConfigApply will update sfp info in memory.
For now it is necessary to restart ptp to reload new sfp information.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

add:
-- wrpcPortLinkStatus
-- wrpcPortSfpPn
-- wrpcPortSfpInDB
-- wrpcPortInternalTX
-- wrpcPortInternalRX

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Add:
--wrpcPtpServoStateN(5)
--wrpcPtpClockOffsetPsHR(8)
--wrpcPtpSkew(9)
--wrpcPtpRTT(10)
--wrpcPtpServoUpdates(12)
--wrpcPtpServoUpdateTime(13)
--wrpcPtpDeltaTxM(14)
--wrpcPtpDeltaRxM(15)
--wrpcPtpDeltaTxS(16)
--wrpcPtpDeltaRxS(17)
--wrpcPtpServoStateErrCnt(18)
--wrpcPtpClockOffsetErrCnt(19)
--wrpcPtpRTTErrCnt(20)
--wrpcPtpAsymmetry(22)
--wrpcPtpTX(23)
--wrpcPtpRX(24)
--wrpcPtpAlpha(26)

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

add:
-- wrpcSpllMode
-- wrpcSpllIrqCnt
-- wrpcSpllSeqState
-- wrpcSpllAlignState
-- wrpcSpllHlock
-- wrpcSpllMlock
-- wrpcSpllHY
-- wrpcSpllMY
-- wrpcSpllDelCnt

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

add:
-- wrpcDateTAI
-- wrpcDateTAIString
-- wrpcSystemUptime

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

They will be implemented with different OIDs.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Add "--x " to all objects. "--x " will be removed when particular object
is implemented.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Mostly spacing and indentation.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

adding uint8_t data_size; to struct snmp_oid does not change memory usage
due to memory alignment.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

rename:
fill -> get
fill_tics -> get_tics
fill_date -> get_date
fill_asn -> get_value
fill_struct_pp_asn -> get_pp
fill_struct_p_asn -> get_p
fill_int32_saturate -> get_i32sat
fill_int32_saturate_pp -> get_i32sat_pp

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

By this 32bytes are saved.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

It will be possible to set via SNMP system name when SNMP SET is implemented.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Respond with SNMP_ERR_GENERR for versions never than 2.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Now all snmp walks should be possible

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Add object with wrpc's version.
For example:
WR-WRPC-MIB::wrWrpcMIB.3.1.0 = STRING: "wrpc-v3.0-161-g4d63c77-dirty"

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

WR-WRPC-MIB.txt is now for testing purposes, it will change.

So far MIB contains following objects:
WR-WRPC-MIB::wrpcPtpRTTHR.0
WR-WRPC-MIB::wrpcPtpDeltaMs.0
WR-WRPC-MIB::wrpcPtpCurSetpoint.0
WR-WRPC-MIB::wrpcNicTX.0
WR-WRPC-MIB::wrpcNicRX.0

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Convert function fill_int32_saturate to take pointer to the data and asn.
The interpretation of pointer in struct snmp_oid is done in
fill_int32_saturate_pp.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

From now, struct snmp_oid contais the pointer (p) which is up to the callback
function to know how to interpret the pointer.

It is easier to handle **data and *data in declaration of the oid_array.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

From now function adding the data to snmp packet (fill_asn), just takes pointer
to the data and asn type. Interpretation of a pointer in struct snmp_oid is now
up to the callback function.

It makes easier to handle different data types.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

objects:
--oid_wrpcNicTX
--oid_wrpcNicRX

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

add:
--oid_wrsPtpServoState
--oid_wrsPtpServoStateN
--oid_wrsPtpClockOffsetPsHR
--oid_wrsPtpSkew
--oid_wrpcPtpRTTHR
--oid_wrpcPtpDeltaMs
--oid_wrpcPtpCurSetpoint

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Used to convert 64bit to 32bit. It is better to saturate 32bit during
conversion than just passing 32 LSB bits.

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>