22 lines
535 B
Bash
Executable File
22 lines
535 B
Bash
Executable File
#!/usr/bin/env bash
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set -eu
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DIR=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)
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MACADDR_FILE="$DIR/tinc-macaddr"
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if [ -e "$MACADDR_FILE" ]; then
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echo "Skip generating MAC: '$MACADDR_FILE' does already exists."
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exit 1
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else
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# Locally Administered Address Ranges:
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#x2-xx-xx-xx-xx-xx
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#x6-xx-xx-xx-xx-xx
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#xA-xx-xx-xx-xx-xx
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#xE-xx-xx-xx-xx-xx
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# Replacing x with any hex value.
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printf '02:1F:%02X:%02X:%02X:%02X\n' \
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$[RANDOM%256] $[RANDOM%256] $[RANDOM%256] $[RANDOM%256] \
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> "$MACADDR_FILE"
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fi
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cat $MACADDR_FILE
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