Method LookupNetIP

internal/bootstrap/resolver.go:34–67

LookupNetIP implements the [Resolver] interface for ParallelResolver.

(
	ctx context.Context,
	network Network,
	host string,
)

// LookupNetIP implements the [Resolver] interface for ParallelResolver.
func (r ParallelResolver) LookupNetIP(
	ctx context.Context,
	network Network,
	host string,
) (addrs []netip.Addr, err error) {
	resolversNum := len(r)
	switch resolversNum {
	case 0:
		return nil, ErrNoResolvers
	case 1:
		return r[0].LookupNetIP(ctx, network, host)
	default:
		// Go on.
	}

	// Size of channel must accommodate results of lookups from all resolvers,
	// sending into channel will block otherwise.
	ch := make(chan any, resolversNum)
	for _, rslv := range r {
		go lookupAsync(ctx, rslv, network, host, ch)
	}

	var errs []error
	for range r {
		switch result := <-ch; result := result.(type) {
		case error:
			errs = append(errs, result)
		case []netip.Addr:
			return result, nil
		}
	}

	return nil, errors.Join(errs...)
}

// recoverAndLog is a deferred helper that recovers from a panic and logs the
// panic value with the logger from context or with a default one.  It sends the