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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
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# Function to get the internet IP
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get_internet_ip() {
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INTERFACE=$(ip route get 8.8.8.8 2>/dev/null | awk '{for(i=1;i<=NF;i++) if ($i=="dev") {print $(i+1); exit}}')
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if [ -z "$INTERFACE" ] || [ "$INTERFACE" = "lo" ]; then
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return 1
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fi
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IP=$(ip -4 addr show dev "$INTERFACE" scope global | grep -oP '(?<=inet\s)\d{1,3}(\.\d{1,3}){3}(?=/)' | head -n1)
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if [ -z "$IP" ]; then
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return 1
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fi
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echo "$IP"
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return 0
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}
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# Get all global non-loopback IPv4 addresses
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ALL_IPS=$(ip -4 addr show scope global | grep -oP '(?<=inet\s)\d{1,3}(\.\d{1,3}){3}(?=/)')
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ARG="${1:-local}"
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if [ "$ARG" = "internet" ]; then
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INTERNET_IP=$(get_internet_ip)
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if [ $? -ne 0 ]; then
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echo "No valid default route or global IPv4 address found."
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exit 1
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fi
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echo "$INTERNET_IP"
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else
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# For "local" or anything else
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INTERNET_IP=$(get_internet_ip) || INTERNET_IP="" # If fails, set to empty so no exclusion
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for IP in $ALL_IPS; do
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if [ "$IP" != "$INTERNET_IP" ]; then
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echo "$IP"
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fi
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done
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fi
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