// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause

package safesocket

import (
	"context"
	"fmt"
	"net"
	"sync/atomic"

	"github.com/akutz/memconn"
)

const memName = "Tailscale-IPN"

// memSeq ensures each IPN instance in the same WASM process gets a distinct
// memconn address, so concurrent instances do not conflict on the registry.
var memSeq atomic.Int64

func listen(path string) (net.Listener, error) {
	name := fmt.Sprintf("%s-%d", memName, memSeq.Add(1))
	return memconn.Listen("memu", name)
}

func connect(ctx context.Context, _ string) (net.Conn, error) {
	return memconn.DialContext(ctx, "memu", memName)
}