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https://gitlab.com/wgp/dougal/software.git
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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.
41 lines
1.1 KiB
Bash
Executable File
41 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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# Path to Nginx configuration file
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NGINX_CONFIG="/etc/nginx/vhosts.d/dougal.conf"
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# Extract the first hostname matching 'lan.dougal' from the config
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# Assumes server_name lines like: server_name hostname1 hostname2;
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HOSTNAME=$(grep -oE '[a-zA-Z0-9.-]*lan\.dougal[a-zA-Z0-9.-]*' "$NGINX_CONFIG" | head -n 1)
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if [ -z "$HOSTNAME" ]; then
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echo "Error: No matching hostname found in $NGINX_CONFIG"
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exit 1
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fi
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# Path to IP retrieval script
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IP_SCRIPT="$HOME/software/sbin/get-ip.sh"
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# Get the current IPv4 address
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IP_ADDRESS=$("$IP_SCRIPT" |head -n1)
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if [ -z "$IP_ADDRESS" ]; then
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echo "Error: Failed to retrieve IP address from $IP_SCRIPT"
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exit 1
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fi
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# Check for DYNDNS_PASSWD environment variable
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if [ -z "$DYNDNS_PASSWD" ]; then
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echo "Error: DYNDNS_PASSWD environment variable is not set"
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exit 1
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fi
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# Hurricane Electric DynDNS update URL
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UPDATE_URL="https://dyn.dns.he.net/nic/update?hostname=$HOSTNAME&password=$DYNDNS_PASSWD&myip=$IP_ADDRESS"
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# Send the update request and capture the response
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RESPONSE=$(curl -s "$UPDATE_URL")
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# Output the response for logging/debugging
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echo "Update response for $HOSTNAME ($IP_ADDRESS): $RESPONSE"
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