mirror of
https://gitlab.com/wgp/dougal/software.git
synced 2025-12-06 05:57:07 +00:00
b8b25dcd62
get-ip.sh internet: returns the first IP address found that has internet access. get-ip.sh local (or no argument): returns the list of non-loopback IPs minus the one that has internet access. This means that update-dns.sh now sends the first IP address that does *not* have internet access.
43 lines
1.1 KiB
Bash
Executable File
43 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
# Function to get the internet IP
|
|
get_internet_ip() {
|
|
INTERFACE=$(ip route get 8.8.8.8 2>/dev/null | awk '{for(i=1;i<=NF;i++) if ($i=="dev") {print $(i+1); exit}}')
|
|
|
|
if [ -z "$INTERFACE" ] || [ "$INTERFACE" = "lo" ]; then
|
|
return 1
|
|
fi
|
|
|
|
IP=$(ip -4 addr show dev "$INTERFACE" scope global | grep -oP '(?<=inet\s)\d{1,3}(\.\d{1,3}){3}(?=/)' | head -n1)
|
|
|
|
if [ -z "$IP" ]; then
|
|
return 1
|
|
fi
|
|
|
|
echo "$IP"
|
|
return 0
|
|
}
|
|
|
|
# Get all global non-loopback IPv4 addresses
|
|
ALL_IPS=$(ip -4 addr show scope global | grep -oP '(?<=inet\s)\d{1,3}(\.\d{1,3}){3}(?=/)')
|
|
|
|
ARG="${1:-local}"
|
|
|
|
if [ "$ARG" = "internet" ]; then
|
|
INTERNET_IP=$(get_internet_ip)
|
|
if [ $? -ne 0 ]; then
|
|
echo "No valid default route or global IPv4 address found."
|
|
exit 1
|
|
fi
|
|
echo "$INTERNET_IP"
|
|
else
|
|
# For "local" or anything else
|
|
INTERNET_IP=$(get_internet_ip) || INTERNET_IP="" # If fails, set to empty so no exclusion
|
|
|
|
for IP in $ALL_IPS; do
|
|
if [ "$IP" != "$INTERNET_IP" ]; then
|
|
echo "$IP"
|
|
fi
|
|
done
|
|
fi
|