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# Network-related helper functions.
# Return an available random local port
local_tcp_port() {
if command -v python3 > /dev/null 2>&1; then
cat << EOF | python3
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('127.0.0.1', 0))
print(s.getsockname()[1])
s.close()
EOF
return
fi
# shellcheck disable=SC2039,3043
local port pid
while true; do
port=$(shuf -i 10000-32768 -n 1)
nc -l 127.0.0.1 "${port}" > /dev/null 2>&1 &
pid=$!
kill "${pid}" > /dev/null 2>&1 || continue
wait "${pid}" || true
echo "${port}"
return
done
}
# Certificate-aware curl wrapper
my_curl() {
curl -k -s --cert "${INCUS_CONF}/client.crt" --key "${INCUS_CONF}/client.key" "$@"
}
# Wait for duplicate address detection to complete.
# Usage: Either "wait_for_dad <device>" or "wait_for_dad <container> <device>".
wait_for_dad() {
cmd="ip -6 a show dev $1"
if [ "$#" -eq 2 ]; then
cmd="incus exec $1 -- ip -6 a show dev $2"
fi
# Ensure the command succeeds (else the while loop will break for the wrong reason).
if ! eval "$cmd"; then
echo "Invalid arguments to wait_for_dad"
false
return
fi
while true; do
ip -6 a show
if ! eval "$cmd" | grep "tentative"; then
break
fi
sleep 0.5
done
}
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