Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Persist snmp script to provide temperature sensor data #456

Open
wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Persist snmp script to provide temperature sensor data #456

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
252 changes: 252 additions & 0 deletions snmp/Openwrt/sensor
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,252 @@
#!/bin/sh
#+##############################################################################
# #
# File: sensor #
# #
# analyes sensor data and give them back to a snmpd running on openwrt #
# #
# /etc/config/snmpd related config #
# #
# config pass #
# option name sensor #
# option persist true #
# option prog /etc/librenms/sensor #
# option miboid .1.3.6.1.4.1.2021.13.16 #
# #
#-##############################################################################
#
# original source
# https://github.com/HolgerHees/smartserver/blob/master/roles/openwrt/templates/config_ap_static/etc/librenms/sensor
#
# Author 2023 - Holger Hees - [email protected]
#

FUNCTION_temp="sensor_1_3_6_1_4_1_2021_13_16_2"
FUNCTION_fan="sensor_1_3_6_1_4_1_2021_13_16_3"

OID_order=".1.3.6.1.4.1.2021.13.16.2"
#OID_order=".1.3.6.1.4.1.2021.13.16.2 .1.3.6.1.4.1.2021.13.16.3"

ACTIVE_FUNCTION=""

sensor_1_3_6_1_4_1_2021_13_16_2(){
COUNTER=0
INDEX=0

IFS=$'\n'

temperatures=$(ls /sys/class/thermal/thermal_zone*/temp 2&>/dev/null)
for item in $temperatures
do
let COUNTER++
let INDEX++

value=$(cat $item 2> /dev/null)
#value=$(echo $value | awk '{printf("%.3f", $1 / 1000.0)}')
name=$(echo $item | sed 's/.*thermal_zone\([0-9]\+\).*/\1/')

eval COUNT_1_3_6_1_4_1_2021_13_16_2_1_${INDEX}="$COUNTER"

eval NAMES_${COUNTER}="zone\$name"
eval VALUES_${COUNTER}="\$value"
fmt_value=$(echo $value | awk '{printf("%.2f\n", $1 / 1000.0)}')
eval FMT_VALUES_${COUNTER}="\$fmt_value"
eval TYPE_${COUNTER}=".1.3.6.1.4.1.2021.13.16.2.1"
eval UNIT_${COUNTER}="°C"
eval INDEX_${COUNTER}="$INDEX"
done

temperatures=$(ls /sys/class/hwmon/hwmon*/temp1_input 2&>/dev/null)
for item in $temperatures
do
let COUNTER++
let INDEX++

value=$(cat $item 2> /dev/null)
#value=$(echo $value | awk '{printf("%.3f", $1 / 1000.0)}')
path=$(echo $item | sed 's/\(.*\)temp1_input/\1/')
name=$(cat $path/name)

eval COUNT_1_3_6_1_4_1_2021_13_16_2_1_${INDEX}="$COUNTER"

eval NAMES_${COUNTER}="\$name"
fmt_value=$(echo $value | awk '{printf("%.2f\n", $1 / 1000.0)}')
eval FMT_VALUES_${COUNTER}="\$fmt_value"
eval VALUES_${COUNTER}="\$value"
eval TYPE_${COUNTER}=".1.3.6.1.4.1.2021.13.16.2.1"
eval UNIT_${COUNTER}="°C"
eval INDEX_${COUNTER}="$INDEX"
done
}

sensor_1_3_6_1_4_1_2021_13_16_3(){
COUNTER=0
INDEX=0

IFS=$'\n'

fan=$(ls /sys/class/hwmon/hwmon*/pwm1 2&>/dev/null)
for item in $fan
do
let COUNTER++
let INDEX++

value=$(cat $item 2> /dev/null)
#value=$(echo $value | awk '{printf("%.3f", $1 / 1000.0)}')
path=$(echo $item | sed 's/\(.*\)pwm1/\1/')
name=$(cat $path/name)

eval NAMES_${COUNTER}="\$name"
fmt_value=$(echo $value | awk '{printf("%d\n", $1 * 100 / 255)}')
eval FMT_VALUES_${COUNTER}="\$fmt_value"
eval VALUES_${COUNTER}="\$value"
eval TYPE_${COUNTER}=".1.3.6.1.4.1.2021.13.16.3.1"
eval UNIT_${COUNTER}="%"
eval INDEX_${COUNTER}="$INDEX"
eval COUNT_1_3_6_1_4_1_2021_13_16_3_1_${INDEX}="$COUNTER"
done
}

eval_function(){
check=$(type -t $@)
if [ "$check" == "" ]
then
exit 0
fi
eval "$@"
}

if [ $# -gt 0 ]
then
eval sensor_function="\$FUNCTION_${1}"
eval_function $sensor_function

for i in `seq 1 $COUNTER`;
do
eval name="\$NAMES_${i}"
eval value="\$FMT_VALUES_${i}"
eval unit="\$UNIT_${i}"
echo $name $value $unit
done
exit 0
fi

sensor_index=1
snmp_index=1

while read line
do
if [ "$line" == "PING" ]
then
echo "PONG"
elif [ "$line" == "get" ] || [ "$line" == "getnext" ]
then
read oid

while true
do
# detect first sensor type if we got only a range oid
snmp_group=$(echo $oid | cut -f11 -d.)
if [ "$snmp_group" == "" ]
then
oid=$(echo $OID_order | cut -f1 -d ' ')
fi

# prepare group oid like temp or fan sensor
snmp_group_prefix=$(echo $oid | cut -f1-11 -d.)
snmp_group_prefix_var_name=${snmp_group_prefix//./$'_'}

# initialize group values by calling related sensor function
sensor_function="sensor$snmp_group_prefix_var_name"
if [ "$ACTIVE_FUNCTION" != $sensor_function ]
then
eval_function $sensor_function
ACTIVE_FUNCTION="$sensor_function"
fi

#.1.3.6.1.4.1.2021.13.16.2.1.{x13}.{x14}
field_index=$(echo $oid | cut -f13 -d.)
if [ "$field_index" == "" ]
then
field_index=1
fi

value_index=$(echo $oid | cut -f14 -d.)
if [ "$value_index" == "" ]
then
sensor_index=1
else
eval sensor_index="\$COUNT${snmp_group_prefix_var_name}_1_${value_index}"

#echo $snmp_group_prefix_var_name
#echo $value_index
#echo $sensor_index
#echo $COUNTER

if [ "$line" == "getnext" ]
then
let sensor_index++

if [ $sensor_index -gt $COUNTER ]
then
sensor_index=1
let field_index++
fi
fi
fi

if [ $field_index -gt 3 ] || [ $sensor_index -gt $COUNTER ]
then
if [ "$line" == "getnext" ]
then
# detect next oid position
IFS=$' '
oid_position=0
for _oid in $OID_order
do
let oid_position++
if [ "$_oid" == "$snmp_group_prefix" ]
then
break
fi
done
let oid_position++

# check if the new oid position is a valid oid group
oid=$(echo $OID_order | cut -f"$oid_position" -d ' ')
if [ "$oid" != "" ] && [ "$oid" != "$OID_order" ]
then
continue
fi
fi

exit 0
fi

eval name="\$NAMES_${sensor_index}"
eval value="\$VALUES_${sensor_index}"
eval type="\$TYPE_${sensor_index}"
eval value_index="\$INDEX_${sensor_index}"

if [ $field_index -eq 1 ]
then
printf "%s.1.%s\n" $type $value_index
echo "integer"
echo $(expr $value_index - 1)
elif [ $field_index -eq 2 ]
then
printf "%s.2.%s\n" $type $value_index
echo "string"
echo $name
elif [ $field_index -eq 3 ]
then
printf "%s.3.%s\n" $type $value_index
echo "gauge32"
echo $value
fi
break
done
else
echo "NONE"
fi
done