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udp-stream
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UDP header serialization object stream.
var UdpStream = require('udp-stream');
var IpStream = require('ip-stream');
var EtherStream = require('ether-stream');
var PcapStream = require('pcap-stream');
var pstream = new PcapStream(PCAP_FILE);
var estream = new EtherStream();
var ipstream = new IpStream();
var ustream = new UdpStream();
pstream.pipe(estream).pipe(ipstream).pipe(ustream);
upstream.on('readable', function() {
var msg = upstream.read();
msg.ether.src === '12:34:56:65:43:21'; // Ethernet frame is still available
msg.ip.src === '1.1.1.1'; // IP header is still available
msg.ip.dst === '2.2.2.2';
msg.ip.protocol === 'udp';
msg.udp.srcPort === 5321; // UDP header is available at .udp property
msg.udo.dstPort === 52;
var payload = msg.data; // UDP data is available at .data property
});
// Packets that cannot be parsed as UDP are emitted with 'ignored' event
upstream.on('ignored', function(msg) {
console.log('Ignored message [' + msg + ']');
});
upstream.read(0);
var UdpStream = require('udp-stream');
var IpStream = require('ip-stream');
var EtherStream = require('ether-stream');
var UdpHeader = require('udp-header');
var IpHeader = require('ip-header');
var EtherFrame = require('ether-frame');
var estream = new EtherStream();
var ipstream = new IpStream();
var ustream = new UdpStream();
estream.pipe(ipstream).pipe(ustream);
// define the header fields to write out to the buffer
var input = {
ether: new EtherFrame({dst: '01:02:03:04:05:06'}),
ip: new IpHeader({dst: '1.2.3.4'}),
udp: new UdpHeader({dstPort: 52, dataLength: 500}),
data: new Buffer(8*1024) // space to write header to
};
// NOTE: packet payload is not in.data, that must be appended later
estream.write(input);
var out = ustream.read();
// header values have been written to the buffer
out.offset === (input.ether.length * input.ip.length + input.udp.length);
test.deepEqual(input.ether, new EtherFrame(out.data, 0));
test.deepEqual(input.ip, new IpHeader(out.data, input.ether.length));
test.deepEqual(input.udp, new UdpHeader(out.data, input.ether.length +
input.ip.length));
// UDP checksums will only be calculated if the message contains both
// the 'ip' header property and the UDP payload. By default the
// payload is assumed to be in the 'suffix' property.
input.suffix = new Buffer(500);
// The location of the UDP payload can be configured.
ustream2 = new UdpStream({payload: 'udpPayload'});
input.udpPayload = new Buffer(500);
FAQs
UDP header serialization object stream.
The npm package udp-stream receives a total of 43 weekly downloads. As such, udp-stream popularity was classified as not popular.
We found that udp-stream demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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Streamline your login process and enhance security by enabling Single Sign-On (SSO) on the Socket platform, now available for all customers on the Enterprise plan, supporting 20+ identity providers.
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