Add a script to gather data via SNMP in the given interval, store it a file
and draw a graph.

Example use:
./snmp_graph.sh -f oids_temp_ip.txt --ip 192.168.1.10
./snmp_graph.sh -f oids_temp.txt --ip 192.168.1.12 --mibs-path "/var/lib/mibs/ietf:../snmpd" --mibs-load WR-SWITCH-MIB"
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

adding support for NIC TX Frames counter and update SNMP due to that

It requires update of FPGA's bitstream. At least to the one including the
commit from wr-switch-hdl repo:
d6cf3c7 adding rmon events in NIC for per-port tx frames

Add verbose messages to the SNMP
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

snmp_set_var_typed_value function does not epxect counter64 values as a
uint64_t, but as a struct counter64. Their binary representation differs by
order of 32bit words. By this it was wrongly seen as a endianess problem.
Since some status objects use 64bit values for calculations it is more
convenient to use uint64_t in our structures, then convert to struct counter64
just before passing data to the SNMP engine.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

There was a special case when there was no update of pstats, but status was
recalculated. Since counters were not updated then deltas of counters were
within limits. It could happen that counters are growing, but statuses are
returning "ok".

For example problem was in the case, when object wrsPstatsHCRXDropRTUFull.1 was
increasing at every read:
$ snmpget WR-SWITCH-MIB::wrsPortStatusSfpError.1 # this triggers a read of
status ports
$ sleep 2
WR-SWITCH-MIB::wrsPortStatusSfpError.1 = INTEGER: sfpOk(1)
$ snmpget WR-SWITCH-MIB::wrsRTUStatus.0 # triggers only read of pstats, values
of status ports are cached (only 2 seconds elapsed)
WR-SWITCH-MIB::wrsRTUStatus.0 = INTEGER: error(2)
$ sleep 4
$ snmpget WR-SWITCH-MIB::wrsRTUStatus.0 # pstats value are cached, but deltas
are re-calculated and are equal to 0. This sould report error as well.
WR-SWITCH-MIB::wrsRTUStatus.0 = INTEGER: ok(1)
After the code is fixed the last one returns error(2)
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

There are some side effects of this commit:
--
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

There are some side effects of this commit:
--use WRS_PORT_STATUS_SFP_IN_DB_* and WRS_PORT_STATUS_SFP_GBE_* instead of
  numbers
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

There are some side effects of this commit:
--add macro SLOG_IF_COMP_WNSG
--fields in the struct wrsNetworkingStatus_config are changed from int to float
  to avoid warning about a wrong parameter for macro SLOG_IF_COMP_WNSG (printf)
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

There are some side effects of this commit:
--print error/warning/warning_na for every partition that causes a problem;
  before error was reported only only for first parition causin a problem
--print warning when at least one temperature threshold is not set;
  before when all were not set
--report WRS_TEMPERATURE_WARNING_TOO_HIGH, even one of the threshold is not set
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

Rename fields in structures to correspond to the MIB names.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Rename fields in the struct wrsSpllVersionGroup_s to reflect SNMP objects'
names.

index -> wrsPtpDataIndex
port_name -> wrsPtpPortName
gm_id -> wrsPtpGrandmasterID
my_id -> wrsPtpOwnID
ppsi_mode -> wrsPtpMode
servo_state_name -> wrsPtpServoState
servo_state -> wrsPtpServoStateN
tracking_enabled -> wrsPtpPhaseTracking
sync_source -> wrsPtpSyncSource
clock_offset -> wrsPtpClockOffsetPs
clock_offsetHR -> wrsPtpClockOffsetPsHR
skew -> wrsPtpSkew
rtt -> wrsPtpRTT
llength -> wrsPtpLinkLength
servo_updates -> wrsPtpServoUpdates
delta_tx_m -> wrsPtpDeltaTxM
delta_rx_m -> wrsPtpDeltaRxM
delta_tx_s -> wrsPtpDeltaTxS
delta_rx_s -> wrsPtpDeltaRxS
n_err_state -> wrsPtpServoStateErrCnt
n_err_offset -> wrsPtpClockOffsetErrCnt
n_err_delta_rtt -> wrsPtpRTTErrCnt
update_time -> wrsPtpServoUpdateTime
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Rename fields in the struct wrsPstatsHCTable_s to reflect SNMP objects'
names (add "wrsPstatsHC" prefix).

As a side effect do the same with struct ns_pstats.

--Changes in wrsPstatsHCTable_s:
index -> wrsPstatsHCIndex
port_name[12] -> WrsPstatsHCPortName[12]
TXUnderrun -> wrsPstatsHCTXUnderrun
RXOverrun -> wrsPstatsHCRXOverrun
RXInvalidCode -> wrsPstatsHCRXInvalidCode
RXSyncLost -> wrsPstatsHCRXSyncLost
RXPauseFrames -> wrsPstatsHCRXPauseFrames
RXPfilterDropped -> wrsPstatsHCRXPfilterDropped
RXPCSErrors -> wrsPstatsHCRXPCSErrors
RXGiantFrames -> wrsPstatsHCRXGiantFrames
RXRuntFrames -> wrsPstatsHCRXRuntFrames
RXCRCErrors -> wrsPstatsHCRXCRCErrors
RXPclass0 -> wrsPstatsHCRXPclass0
RXPclass1 -> wrsPstatsHCRXPclass1
RXPclass2 -> wrsPstatsHCRXPclass2
RXPclass3 -> wrsPstatsHCRXPclass3
RXPclass4 -> wrsPstatsHCRXPclass4
RXPclass5 -> wrsPstatsHCRXPclass5
RXPclass6 -> wrsPstatsHCRXPclass6
RXPclass7 -> wrsPstatsHCRXPclass7
TXFrames -> wrsPstatsHCTXFrames
RXFrames -> wrsPstatsHCRXFrames
RXDropRTUFull -> wrsPstatsHCRXDropRTUFull
RXPrio0 -> wrsPstatsHCRXPrio0
RXPrio1 -> wrsPstatsHCRXPrio1
RXPrio2 -> wrsPstatsHCRXPrio2
RXPrio3 -> wrsPstatsHCRXPrio3
RXPrio4 -> wrsPstatsHCRXPrio4
RXPrio5 -> wrsPstatsHCRXPrio5
RXPrio6 -> wrsPstatsHCRXPrio6
RXPrio7 -> wrsPstatsHCRXPrio7
RTUValid -> wrsPstatsHCRTUValid
RTUResponses -> wrsPstatsHCRTUResponses
RTUDropped -> wrsPstatsHCRTUDropped
FastMatchPriority -> wrsPstatsHCFastMatchPriority
FastMatchFastForward -> wrsPstatsHCFastMatchFastForward
FastMatchNonForward -> wrsPstatsHCFastMatchNonForward
FastMatchRespValid -> wrsPstatsHCFastMatchRespValid
FullMatchRespValid -> wrsPstatsHCFullMatchRespValid
Forwarded -> wrsPstatsHCForwarded
TRURespValid -> wrsPstatsHCTRURespValid

--changes in ns_pstats:
TXUnderrun -> wrsPstatsHCTXUnderrun
RXOverrun -> wrsPstatsHCRXOverrun
RXInvalidCode -> wrsPstatsHCRXInvalidCode
RXSyncLost -> wrsPstatsHCRXSyncLost
RXPfilterDropped -> wrsPstatsHCRXPfilterDropped
RXPCSErrors -> wrsPstatsHCRXPCSErrors
RXCRCErrors -> wrsPstatsHCRXCRCErrors
RXFrames -> wrsPstatsHCRXFrames
RXPrio0 -> wrsPstatsHCRXPrio0
RXPrio1 -> wrsPstatsHCRXPrio1
RXPrio2 -> wrsPstatsHCRXPrio2
RXPrio3 -> wrsPstatsHCRXPrio3
RXPrio4 -> wrsPstatsHCRXPrio4
RXPrio5 -> wrsPstatsHCRXPrio5
RXPrio6 -> wrsPstatsHCRXPrio6
RXPrio7 -> wrsPstatsHCRXPrio7
FastMatchPriority -> wrsPstatsHCFastMatchPriority
RXDropRTUFull -> wrsPstatsHCRXDropRTUFull
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Rename fields in the struct wrsSpllVersionGroup_s to reflect SNMP objects'
names.

commit_id -> wrsSpllVersion
build_date -> wrsSpllBuildDate
build_by -> wrsSpllBuildBy
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Rename fields in the struct wrsTemperature_s to reflect SNMP objects'
names.

temp_fpga -> wrsTempFPGA
temp_pll -> wrsTempPLL
temp_psl -> wrsTempPSL
temp_psr -> wrsTempPSR
temp_fpga_thold -> wrsTempThresholdFPGA
temp_pll_thold -> wrsTempThresholdPLL
temp_psl_thold -> wrsTempThresholdPSL
temp_psr_thold -> wrsTempThresholdPSR
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

/etc/init.d/dot-config can save information e.g. that it failed to get
dot-config form the given URL. However, apply_dot-config called from
/etc/init.d/dot-config overwrites this information by the result of checking
the dot-config. The checking of the dot-config has to be done also in
apply_dot-config, because the webinterface writes down changed dot-config and
executes only apply_dot-config.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Rename fields in the struct wrsPortStatusTable_s to reflect SNMP objects'
names.

link_up -> wrsPortStatusLink
port_mode -> wrsPortStatusConfiguredMode
port_locked -> wrsPortStatusLocked
sfp_vn[16] -> wrsPortStatusSfpVN[16]
sfp_pn[16] -> wrsPortStatusSfpPN[16]
sfp_vs[16] -> wrsPortStatusSfpVS[16]
sfp_in_db -> wrsPortStatusSfpInDB
sfp_GbE -> wrsPortStatusSfpGbE
sfp_error -> wrsPortStatusSfpError
ptp_tx_count -> wrsPortStatusPtpTxFrames
ptp_rx_count -> wrsPortStatusPtpRxFrames
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Postpone the printout of the fibers alpha. Alpha is known after fiber match,
not after SFP match as it was before.

Also print RX/TX wave lengths of SFPs.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Zero also sfp->rx_wl (not only sfp->tx_wl) when wl_txrx not found for specific
SFP entry.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Add the following SNMP objects:
--wrsSpllBuildBy
--wrsPtpServoUpdateTime
--wrsFwUpdateStatus
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Inform if last firmware update was successful.
Uses previous commit:
rootfs: check md5sum of firmware before update
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Check md5sums of files in the wrs-firmware.tar with stored in file
checksums.md5. When checksum does not match abort the update.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

Try to source in the subshell downloaded dot-config.
This test can detect problems like unterminated quoted string:
/bin/sh: /tmp/dot-config: line 59: syntax error: unterminated quoted string
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

In some rare cases it can happen that locally stored dot-config is not valid.
For example, when firmware on the switch was updated, but the old dot-config is
still used. However, such scenario is unlikely because new firmware should
contain new dot-config.

--check whether sourcing was successful
--Replace "." with "source" when sourcing dot-config.
--Redirect errors to the stderr.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Perform uplift of the buildroot to the 2016.02.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

When switch's firmware with buildroot older than 2016.02 was updated via
copying wrs-firmware.tar with buildroot at least 2016.02 to the
/update partition, then hwinfo in the flash was overwriten.
Such behaviour was caused by crashing during execution of /wr/bin/sdb-read.
Crashing sdb-read caused the following if's condition from the file
/etc/init.d/hwinfo to be false.

if /wr/bin/sdb-read /dev/mtd5ro > /dev/null; then

This triggered later overwrite of hwinfo partition.

/wr/bin/sdb-read was crashing because during update the binary /wr/bin/sdb-read
was called from just extracted firmware. Problem pops up when libraries
required by sdb-read are in the different versions in the old and the new
firmware. Unfortunatelly, this problem cannot be easily solved, since we cannot
change the update procedure in already installed firmware (the one that is
performing update).

Implemented solution does the following:
--change the name of /wr/etc/sdb-for-dataflash to /wr/etc/sdb-for-dataflash.bin
  by this /etc/init.d/hwinfo script exits with an error without modification
  to the hwinfo partition.
--rename link /etc/rcS/S90hwinfo to /etc/rcS/S10hwinfo, which will trigger
  update of hwinfo partition earlier during the boot.
--restart switch after update of hwinfo in the flash
--remove calls of /etc/init.d/hwinfo during the update
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

The problem is that the "reboot" command sends the signal to the init. However,
it looks like init queues all incoming signals. They're handled after all
"sysinit" commands from the inittab are finished.
reboot -f skip sending the signal and triggers the reboot immediately.

This problem pop up after update of a buildroot to version 2016.02.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

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

When Barebox's menu is displayed, it erases all messages from the screen.
Put some extra newlines to move out printed messages from the screen.
These messages could be seen now in the terminal's history.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>