How to use ipBlockFromCIDR method of types Package

Best K6 code snippet using types.ipBlockFromCIDR

ipblock.go

Source:ipblock.go

...44	switch {45	case strings.Contains(s, "-"):46		return ipBlockFromRange(s)47	case strings.Contains(s, "/"):48		return ipBlockFromCIDR(s)49	default:50		if net.ParseIP(s) == nil {51			return nil, fmt.Errorf("%s is not a valid IP, IP range or CIDR", s)52		}53		return ipBlockFromRange(s + "-" + s)54	}55}56func ipBlockFromRange(s string) (*ipBlock, error) {57	ss := strings.SplitN(s, "-", 2)58	ip0, ip1 := net.ParseIP(ss[0]), net.ParseIP(ss[1])59	if ip0 == nil || ip1 == nil {60		return nil, errors.New("wrong IP range format: " + s)61	}62	if (ip0.To4() == nil) != (ip1.To4() == nil) { // XOR63		return nil, errors.New("mixed IP range format: " + s)64	}65	block := ipBlockFromTwoIPs(ip0, ip1)66	if block.count.Sign() <= 0 {67		return nil, errors.New("negative IP range: " + s)68	}69	return block, nil70}71func ipBlockFromTwoIPs(ip0, ip1 net.IP) *ipBlock {72	// This code doesn't do any checks on the validity of the arguments, that should be73	// done before and/or after it is called74	var block ipBlock75	block.firstIP = new(big.Int)76	block.count = new(big.Int)77	block.ipv6 = ip0.To4() == nil78	if block.ipv6 {79		block.firstIP.SetBytes(ip0.To16())80		block.count.SetBytes(ip1.To16())81	} else {82		block.firstIP.SetBytes(ip0.To4())83		block.count.SetBytes(ip1.To4())84	}85	block.count.Sub(block.count, block.firstIP)86	block.count.Add(block.count, big.NewInt(1))87	return &block88}89func ipBlockFromCIDR(s string) (*ipBlock, error) {90	_, pnet, err := net.ParseCIDR(s)91	if err != nil {92		return nil, fmt.Errorf("parseCIDR() failed parsing %s: %w", s, err)93	}94	ip0 := pnet.IP95	// TODO: this is just to copy it, it will probably be better to copy the bytes ...96	ip1 := net.ParseIP(ip0.String())97	if ip1.To4() == nil {98		ip1 = ip1.To16()99	} else {100		ip1 = ip1.To4()101	}102	for i := range ip1 {103		ip1[i] |= (255 ^ pnet.Mask[i])...

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