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249 lines (209 loc) · 9.15 KB
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import IpHeader from 'ip-header'
import UdpHeader from 'udp-header'
import Dgram from 'dgram'
import Ethernet from './lib/ethernet'
export default class SONAR {
constructor(callback, active){
try{
this._cap = require('cap')
}catch(e){
// 드라이버가 없으면 이를 알립니다.
if(typeof callback === 'function')
callback(false, null, 'nmap not exist')
this._cap = null
this._driver = null
this._active = null
//this._isOpened = false
return
}
// 드라이버가 있으면 인스턴스를 구성합니다.
this._driver = new this._cap.Cap()
this._active = active
this._noRaw = null
callback(true, this)
}
write(buffer){
// 드라이버가 없으면 진행하지 않습니다.
if(this._driver === null) return 'nmap not exist'
// 전송 중 문제가 있다면
// 해당 오류 메시지를 반환합니다.
try{
let bias = this._driver.send(buffer, buffer.length)
}catch(e){ return e }
return null
}
send(buffer, option){
if(typeof option !== 'object')
return 'option not exist'
if(typeof buffer === 'string')
buffer = Buffer.from(buffer)
// 전송시 로우소켓을 이용하지 않는 옵션도 존재합니다.
if(typeof option['noRaw'] !== 'undefined' && option['noRaw']){
if(this._noRaw === null)
this._noRaw = Dgram.createSocket('udp4')
this._noRaw.send(buffer, 0, buffer.length, option.to.port, option.to.address, (err, bytes)=>{
if (err) {
console.log(`UDP NO RAW PACKET SEND FAILURE: ${err}`)
throw err
}
})
return null
}
option.message = buffer
let udpBuffer = this.udpBufferIPv4(option)
return this.write(udpBuffer)
}
udpBufferIPv4(option){
let etherOpt = { type: 'ip' }
etherOpt.src = this._active.mac // '00:25:22:46:15:16'
etherOpt.dst = this._active.gateway.mac // '00:08:9f:07:7b:80'
let udpHeaderSize = 8
let packetSize = udpHeaderSize + option.message.byteLength
let etherh = new Ethernet(etherOpt)
let iph = new IpHeader({
src: option.from.address,
dst: option.to.address,
protocol: 'udp',
flags: { df: false },
dataLength: packetSize
})
let udph = new UdpHeader({
srcPort: option.from.port,
dstPort: option.to.port,
totalLength: packetSize
})
let packet = Buffer.concat([
etherh.toBuffer(),
iph.toBuffer(),
udph.toBuffer(),
option.message
])
return packet
}
open(clientAddress){
let devices = this._cap.deviceList()
let foundedLoopback = null
for(let device of devices){
if(typeof device['flags'] !== 'undefined'){
if(device.flags == 'PCAP_IF_LOOPBACK')
foundedLoopback = device
break
}
}
if(foundedLoopback === null){
console.log(devices)
throw new Error(`CAN'T FOUNDED SOCKET`)
}
let device = this._cap.Cap.findDevice(clientAddress)
let filter = ''
let bufSize = 10 * 1024 * 1024
this.buffer = Buffer.alloc(65535)
//let linkType = this._driver.open(foundedLoopback.name, filter, bufSize, this.buffer)
let linkType = this._driver.open(device, filter, bufSize, this.buffer)
this._driver.setMinBytes && this._driver.setMinBytes(0)
return linkType
}
on(callback){
if(typeof callback === 'function')
this._driver.on('packet', callback)
}
bind(option){
if(typeof option !== 'object')
return false
// 기본인자 초기화
if(typeof option['type'] === 'undefined')
option['type'] = 'udp'
if(typeof option['port'] === 'undefined')
option['port'] = null
// 기본콜백 초기화
let bindCallback = undefined
if(typeof option['bind'] === 'function')
bindCallback = option['bind']
let receiveCallback = undefined
if(typeof option['bind'] === 'function')
receiveCallback = option['receive']
// NPCAP 시작
let linkType = this.open(option.host)
switch(option.type){
case 'udp':
let server = Dgram.createSocket('udp4')
server.on('listening', (error) => {
if(typeof option['init'] === 'function')
option['init'](server, option, error)
})
server.on('message', (msg, remote, error) => {
if(typeof receiveCallback === 'function')
receiveCallback(msg, remote, error, server, option)
})
server.bind({
port: option.port,
address: option.host
}, (error)=>{
if(typeof bindCallback === 'function')
bindCallback(server, option, error)
})
break
case 'sonar':
let decoders = this._cap.decoders
let PROTOCOL = decoders.PROTOCOL
if(typeof option['init'] === 'function')
option['init'](linkType, option)
this.on((nbytes, trunc)=>{
// raw packet data === buffer.slice(0, nbytes)
if (linkType === 'ETHERNET') {
let ret = decoders.Ethernet(this.buffer)
// console.log('packet: length ' + nbytes + ' bytes, truncated? ' + (trunc ? 'yes' : 'no'))
if (ret.info.type === PROTOCOL.ETHERNET.IPV4) {
let retm = ret
ret = decoders.IPV4(this.buffer, ret.offset)
//console.log('RECEIVED PCAP PACKET...')
// if(String(ret.info.srcaddr) != String(ret.info.dstaddr)) return
if (ret.info.protocol === PROTOCOL.IP.TCP) {
return
let datalen = ret.info.totallen - ret.hdrlen
console.log('Decoding TCP ...')
ret = decoders.TCP(this.buffer, ret.offset)
console.log(' from port: ' + ret.info.srcport + ' to port: ' + ret.info.dstport)
datalen -= ret.hdrlen
console.log(new Buffer(this.buffer.toString('binary', ret.offset, ret.offset + datalen)))
} else if (ret.info.protocol === PROTOCOL.IP.UDP) {
//if(String(ret.info.srcaddr) != '18.18.18.18') return
let retb = ret
ret = decoders.UDP(this.buffer, ret.offset)
let data = this.buffer.toString('binary', ret.offset, ret.offset + ret.info.length)
if(data != 'hello! world') return
//if(retb.info.srcaddr == '58.233.73.13') return
//if(retb.info.dstaddr == '58.233.73.13') return
console.log('')
console.log('Decoding IPv4 ...')
console.log('from: ' + retb.info.srcaddr + ' to ' + retb.info.dstaddr)
console.log('Decoding UDP ...')
console.log(' from port: ' + ret.info.srcport + ' to port: ' + ret.info.dstport)
console.log(retm)
console.log(retb)
console.log(ret)
console.log(Buffer.from(this.buffer.toString('binary', ret.offset, ret.offset + ret.info.length)))
console.log(Buffer.from(this.buffer.toString('binary', ret.offset, ret.offset + ret.info.length)).byteLength)
console.log(this.buffer.toString('binary', ret.offset, ret.offset + ret.info.length))
} //else
//console.log('Unsupported IPv4 protocol: ' + PROTOCOL.IP[ret.info.protocol])
} else {
/*
console.log('Decoding IPv4 ...')
console.log('from: ' + ret.info.srcaddr + ' to ' + ret.info.dstaddr)
console.log('Unsupported Ethertype: ' + PROTOCOL.ETHERNET[ret.info.type])
console.log(ret.info)
console.log(ret)
*/
}
}
})
if(typeof bindCallback === 'function')
bindCallback(linkType, option)
break
default:
throw new Error('undefined bind type')
}
return true
}
}