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Allow for multiple check hosts/IPs #7

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Merged
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Aug 28, 2020
Merged

Allow for multiple check hosts/IPs #7

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24 changes: 18 additions & 6 deletions network_check.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -8,8 +8,9 @@
# Configuration variables, customize if needed
###

# Set gateway_ip to the gateway that you want to check to declare network working or not
gateway_ip='1.1.1.1'
# Set gateway_ips to one or more ips that you want to check to declare network working or not
# If any of the computers respond, the network is considered up. Only one is required.
gateway_ips='1.1.1.1 8.8.8.8'
# Set nic to your Network card name, as seen in ip output
nic='wlan0'
# Set network_check_threshold to the maximum number of failed checks
Expand All @@ -36,6 +37,19 @@ function date_log {
echo "$(date +'%Y-%m-%d %T') $1"
}

function check_gateways {
# Check each IP address one at a time. Return as soon as one is good
for ip in $gateway_ips; do
ping -c 1 $ip > /dev/null 2>&1
# Return as soon as one is good
if [[ $? == 0 ]]; then
return 0
fi
done
return 1
}


function restart_wlan {
# Trying wlan restart using ip
date_log "Network was not working for the previous $network_check_tries checks."
Expand All @@ -45,8 +59,7 @@ function restart_wlan {
/sbin/ip link set "$nic" up
sleep 60

# Pinging gateway_ip one time
ping -c 1 $gateway_ip > /dev/null 2>&1
check_gateways
# If previous command was NOT successful
if [[ $? != 0 ]]; then
if [ "$reboot_server" = true ]; then
Expand All @@ -69,8 +82,7 @@ while [ $network_check_tries -lt $network_check_threshold ]; do
# Increasing network_check_tries by 1
network_check_tries=$[$network_check_tries+1]

# Pinging gateway_ip one time
ping -c 1 $gateway_ip > /dev/null 2>&1
check_gateways
# If previous command was successful
if [[ $? = 0 ]]; then
# Network is up
Expand Down