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function _normalizeFamily(family) {
return family ? family.toLowerCase() : 'ipv4';
}
function isLoopback(addr) {
return /^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})/
.test(addr) ||
/^fe80::1$/.test(addr) ||
/^::1$/.test(addr) ||
/^::$/.test(addr);
};
function isPrivate(addr) {
return /^(::f{4}:)?10\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i
.test(addr) ||
/^(::f{4}:)?192\.168\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) ||
/^(::f{4}:)?172\.(1[6-9]|2\d|30|31)\.([0-9]{1,3})\.([0-9]{1,3})$/i
.test(addr) ||
/^(::f{4}:)?127\.([0-9]{1,3})\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) ||
/^(::f{4}:)?169\.254\.([0-9]{1,3})\.([0-9]{1,3})$/i.test(addr) ||
/^f[cd][0-9a-f]{2}:/i.test(addr) ||
/^fe80:/i.test(addr) ||
/^::1$/.test(addr) ||
/^::$/.test(addr);
};
function isPublic(addr) {
return !isPrivate(addr);
};
//
// Default to `ipv4`
//
function loopback(family) {
family = _normalizeFamily(family);
if (family !== 'ipv4' && family !== 'ipv6') {
throw new Error('family must be ipv4 or ipv6');
}
return family === 'ipv4' ? '127.0.0.1' : 'fe80::1';
};
//
// ### function address (name, family)
// #### @name {string|'public'|'private'} **Optional** Name or security
// of the network interface.
// #### @family {ipv4|ipv6} **Optional** IP family of the address (defaults
// to ipv4).
//
// Returns the address for the network interface on the current system with
// the specified `name`:
// * String: First `family` address of the interface.
// If not found see `undefined`.
// * 'public': the first public ip address of family.
// * 'private': the first private ip address of family.
// * undefined: First address with `ipv4` or loopback address `127.0.0.1`.
//
module.exports = function localIpUrl(name, family) {
var interfaces = os.networkInterfaces();
var all;
//
// Default to `ipv4`
//
family = _normalizeFamily(family);
//
// If a specific network interface has been named,
// return the address.
//
if (name && name !== 'private' && name !== 'public') {
var res = interfaces[name].filter(function (details) {
var itemFamily = details.family.toLowerCase();
return itemFamily === family;
});
Iif (res.length === 0)
return undefined;
return res[0].address;
}
var all = Object.keys(interfaces).map(function (nic) {
//
// Note: name will only be `public` or `private`
// when this is called.
//
var addresses = interfaces[nic].filter(function (details) {
details.family = details.family.toLowerCase();
if (details.family !== family || isLoopback(details.address)) {
return false;
} else if (!name) {
return true;
}
return name === 'public' ? isPrivate(details.address) : isPublic(details.address);
});
return addresses.length ? addresses[0].address : undefined;
}).filter(Boolean);
return !all.length ? loopback(family) : all[0];
}
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