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securityonion/setup/so-common-functions
2020-07-17 14:41:44 -04:00

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#!/bin/bash
source ./so-variables
source ../salt/common/tools/sbin/so-common
# Helper functions
filter_unused_nics() {
if [[ $MNIC ]]; then local grep_string="$MNIC\|bond0"; else local grep_string="bond0"; fi
# If we call this function and NICs have already been assigned to the bond interface then add them to the grep search string
if [[ $BNICS ]]; then
grep_string="$grep_string"
for BONDNIC in "${BNICS[@]}"; do
grep_string="$grep_string\|$BONDNIC"
done
fi
# Finally, set filtered_nics to any NICs we aren't using (and ignore interfaces that aren't of use)
filtered_nics=$(ip link| awk -F: '$0 !~ "lo|vir|veth|br|docker|wl|^[^0-9]"{print $2}' | grep -vwe "$grep_string" | sed 's/ //g')
readarray -t filtered_nics <<< "$filtered_nics"
nic_list=()
for nic in "${filtered_nics[@]}"; do
nic_list+=("$nic" "" "OFF")
done
export nic_list
}
calculate_useable_cores() {
# Calculate reasonable core usage
local cores_for_zeek=$(( (num_cpu_cores/2) - 1 ))
local lb_procs_round
lb_procs_round=$(printf "%.0f\n" $cores_for_zeek)
if [ "$lb_procs_round" -lt 1 ]; then lb_procs=1; else lb_procs=$lb_procs_round; fi
export lb_procs
}