18 lines
565 B
Bash
18 lines
565 B
Bash
#!/bin/sh
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[ "$(uci get network.globals.ula_prefix)" != "auto" ] && exit 0
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# Sometimes results are empty, therefore try until it works...
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local r1 r2 r3
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while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
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r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
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r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
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r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
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done
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uci -q batch <<-EOF >/dev/null
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set network.globals.ula_prefix=fd$r1:$r2:$r3::/48
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commit network
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EOF
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exit 0
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