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/**
* Check if a hostname is an IP. You should be aware that this only works
* because `hostname` is already garanteed to be a valid hostname!
*/
function isProbablyIpv4(hostname) {
// Cannot be shorted than 1.1.1.1
if (hostname.length < 7) {
return false;
}
// Cannot be longer than: 255.255.255.255
if (hostname.length > 15) {
return false;
}
var numberOfDots = 0;
for (var i = 0; i < hostname.length; i += 1) {
var code = hostname.charCodeAt(i);
if (code === 46 /* '.' */) {
numberOfDots += 1;
}
else if (code < 48 /* '0' */ || code > 57 /* '9' */) {
return false;
}
}
return (numberOfDots === 3 &&
hostname.charCodeAt(0) !== 46 /* '.' */ &&
hostname.charCodeAt(hostname.length - 1) !== 46 /* '.' */);
}
/**
* Similar to isProbablyIpv4.
*/
function isProbablyIpv6(hostname) {
// We only consider the maximum size of a normal IPV6. Note that this will
// fail on so-called "IPv4 mapped IPv6 addresses" but this is a corner-case
// and a proper validation library should be used for these.
if (hostname.length > 39) {
return false;
}
var hasColon = false;
for (var i = 0; i < hostname.length; i += 1) {
var code = hostname.charCodeAt(i);
if (code === 58 /* ':' */) {
hasColon = true;
}
else if (((code >= 48 && code <= 57) || // 0-9
(code >= 97 && code <= 102)) === false // a-f
) {
return false;
}
}
return hasColon;
}
/**
* Check if `hostname` is *probably* a valid ip addr (either ipv6 or ipv4).
* This *will not* work on any string. We need `hostname` to be a valid
* hostname.
*/
export default function isIp(hostname) {
return isProbablyIpv6(hostname) || isProbablyIpv4(hostname);
}
//# sourceMappingURL=is-ip.js.map
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