network-config
Version:
debian ip network configuration for NodeJS
278 lines (231 loc) • 6.75 kB
JavaScript
;
var _ = require('lodash');
var fs = require('fs');
var INET = 'inet';
var INET6 = 'inet6';
var BCAST = 'Bcast';
module.exports = function (cp) {
function interfaces (f, options = {interfaces: {file: '/etc/network/interfaces', parse: false}, gateway: {resolveHostNames: false}}) {
// @todo add command timeout
cp.exec('ifconfig', function (err, ifConfigOut, stderr) {
if (err) {
return f(err);
}
if (stderr) {
return f(stderr);
}
var routeCommand = options.gateway !== undefined && options.gateway.resolveHostNames ? 'route' : 'route -n';
if (options.gateway && options.gateway.route6) {
routeCommand = `${routeCommand} && route -6n`;
}
cp.exec(routeCommand, function (err, routeOut, stderr) {
if (err) {
return f(err);
}
if (stderr) {
return f(stderr);
}
if (options.interfaces.parse) {
fs.readFile(options.interfaces.file, {encoding: 'utf-8'}, (err, content) => {
if(err) {
return f(err);
}
f(null, parse(ifConfigOut, routeOut, content));
});
return;
}
f(null, parse(ifConfigOut, routeOut));
});
});
};
return interfaces;
};
function parse(ifConfigOut, routeOut, interfacesContent) {
return ifConfigOut.trim().split('\n\n').map(function (inface) {
var lines = inface.split('\n');
/**
* Format 1
* link xx:xx HWaddr xx-xx-xx
* link xx:xx HWaddr xx:xx:xx
*
* Format 1
* inet xx:xxx.xxx.xxx.xxx mask|masque|...:xxx.xxx.xxx.xxx
*/
const ipv4 = getInterfaceIpv4Addr(lines[1])
const ipv6 = getInterfaceIpv6Addr(lines[1]) || getInterfaceIpv6Addr(lines[2])
const ip6prefixlen = getIPv6PrefixLen(lines[1]) || getIPv6PrefixLen(lines[2]);
const ip6Gateway = getIPv6Gateway(routeOut)
var result = {
name: getInterfaceName(_.first(lines)),
ip: ipv4,
netmask: getInterfaceNetmaskAddr(lines[1]),
broadcast: getBroadcastAddr(lines[1]),
mac: getInterfaceMacAddr(inface),
gateway: getGateway(routeOut),
...ipv6 && { ip6: ipv6 },
...ip6prefixlen && {ip6prefixlen},
...ip6Gateway && {ip6Gateway}
};
if(interfacesContent) {
result.dhcp = isDhcp(getInterfaceName(_.first(lines)), interfacesContent)
}
return result;
});
}
function isDhcp(interfaceName, content) {
if(interfaceName && interfaceName.length > 0) {
const re = new RegExp(`iface ${interfaceName}[a-zA-Z0-9 ]* dhcp`,"i")
return re.test(content);
}
return false;
}
function getInterfaceName(firstLine) {
return _.first(firstLine.split(/ |(: )/));
}
/**
* extract mac adress
*
* ifconfig output:
* - link xx:xx HWaddr xx-xx-xx
* - link xx:xx HWaddr xx:xx:xx
* or
* - ether xx:xx:xx:xx:xx:xx txqueuelen 1000 (Ethernet)
*
* @param {string} firstLine
* @return {string} Mac address, format: "xx:xx:xx:xx:xx:xx"
*/
function getInterfaceMacAddr(str) {
const re = new RegExp(`(?:(?:HWaddr)|(?:ether)) ((?:[0-9a-z]{2}[-:]?){6,})`,"i")
const match = str.match(re)
if (!match) return null
if (match[1].length !== "00:00:00:00:00:00".length) return null
const mac = match[1]
return mac
}
/**
* extract ip4 addr
*
* ifconfig output:
* - inet xx:xxx.xxx.xxx.xxx mask|masque|...:xxx.xxx.xxx.xxx
*
* @param {string} line
* @return {string,null} xxx.xxx.xxx.xxx
*/
function getInterfaceIpv4Addr(line) {
if (!_.includes(line, INET)) {
return null;
}
const ip4re = new RegExp(`(?:(?:inet adr\:)|(?:inet addr\:)|(?:inet ))((?:[0-9]{1,3}\.?){4})`)
const ip4match = line.match(ip4re)
return (ip4match) ? ip4match[1].trim() : null;
}
/**
* extract ip6 addr
*
* ifconfig output:
* - inet6 xxxx::xxxx:xxxx:xxxx:xxxx prefixlen xx scopeid xxxx<link>
*
* @param {string} line
* @return {string,null} xxxx::xxxx:xxxx:xxxx:xxxx
*/
function getInterfaceIpv6Addr(line) {
if (!_.includes(line, INET6)) {
return null;
}
const ip6re = new RegExp(`(?:(?:inet6 adr\:)|(?:inet6 addr\:)|(?:inet6 ))((?:[a-f0-9:]+([\:]{1,2})?){2,16})`)
const ip6match = line.match(ip6re);
return (ip6match) ? ip6match[1].trim() : null;
}
/**
* extract netmask addr
*
* ifconfig output:
* - inet xx:xxx.xxx.xxx.xxx mask|masque|...:xxx.xxx.xxx.xxx
* or
* - inet xxx.xxx.xxx.xxx netmask xxx.xxx.xxx.xxx
*
* @param {string} line
* @return {string,null} xxx.xxx.xxx.xxx
*/
function getInterfaceNetmaskAddr(line) {
if (!_.includes(line, INET)) {
return null;
}
const re = new RegExp(`(?:(?:Masque\:)|(?:Mask\:)|(?:netmask ))((?:[0-9]{1,3}\.?){4})`)
const match = line.match(re)
if (match) {
return match[1].trim();
} else {
return null;
}
}
/**
* extract ipv6 prefixlen
*
* ifconfig output:
* - inet6 xxxx::xxxx:xxxx:xxxx:xxxx prefixlen 64 scopeid 0x20<link>
*
* @param {string} line
* @return {integer,null} xxx
*/
function getIPv6PrefixLen(line) {
if (!_.includes(line, INET)) {
return null;
}
const re = new RegExp(`(?:(?:prefixlen ))((?:[0-9]{1,3} ))`)
const match = line.match(re)
if (match) {
return match[1].trim();
} else {
return null;
}
}
/**
* extract broadcast addr
* @param {string} line
* @return {string,null} xxx.xxx.xxx.xxx
*/
function getBroadcastAddr(line) {
if (!line.match( new RegExp(`(${BCAST})|(broadcast)`))) {
return null;
}
const re = new RegExp(`(?:(?:${BCAST}\:)|(?:broadcast ))((?:[0-9]{1,3}\.?){4})`)
const match = line.match(re)
return match[1].trim()
}
/**
* extract gateway ip
* @param {string} stdout
* @return {string,null} default gateway ip or null
*/
function getGateway(stdout) {
const re = new RegExp(`(?:(?:default)|(?:link-local)|(?:0\.0\.0\.0)) +([^ ]+)`)
const match = stdout.match(re)
if (match === null) return null
const gw = match[1].split(/[-\.]/g).slice(0,4).join(".")
return gw
}
/**
* extract IPv6 gateway ip
* @param {string} stdout
* @return {string,null} default gateway ip or null
*/
function getIPv6Gateway(stdout) {
const re = new RegExp(`(?:(?:\:\:/0)) +([^ ]+)`)
const match = stdout.match(re)
if (match === null) return null
const gw = match[1].split(/[-\.]/g).slice(0,4).join(".")
return gw
}
/**
* extract ipv6 gateway ip
* @param {string} stdout
* @return {string,null} default gateway ip or null
*/
function getIP6Gateway(stdout) {
const re = new RegExp(`(?:(?:default)|(?:link-local)|(?:0\.0\.0\.0)) +([^ ]+)`)
const match = stdout.match(re)
if (match === null) return null
const gw = match[1].split(/[-\.]/g).slice(0,4).join(".")
return gw
}