coap [Malformed Packet] and async calls

[alan10]

Hi, I'm using cooja simulator to simulate my coap server so i can´t paste here the code of the server, but basically it has a resource /test/hello that has the following information {info:{name: "sensor1", location:"Room"}}. When i make my request i check that in wireshar it gives me a Malformed Packet, but it retrives the data that i want, what am i doing wrong? my client code is:

const coap = require('coap');
var option = {'Content-Format': 'application/link-format'};
var obj = {hostname:"aaaa::c30c:0:0:3",
    port:5683,
    pathname:"test/hello",
    method: 'GET',
    //query: 'ASDFGASHDT',
    options: option
    };
const req = coap.request(obj);
req.on('response', function(res) {

    res.pipe(process.stdout);
});
req.end();

and a screenshoot of wireshark capture

and i want to make this call to a set of ip's and wait for the response to send it all when finished, so i've made this functions:

var coap=require('coap');
var bl=require('bl');

var ips=["aaaa::c30c:0:0:3","aaaa::c30c:0:0:2"];

function async(ip, callback) {
    var option = {accept: 'application/json'};
        var obj = {hostname : ip,
        port:5683,
    method: 'GET',
    confirmable: true,
        pathname:"test/hello",      
    options: [{"Accept": "application/json"}]
    };

    var data="";
    var reqCoap = coap.request(obj);

    reqCoap.on('response',function(res){
       res.pipe(bl(function(err, data) {          
            var json = JSON.parse(data);
            callback(json);            
        }));
       res.on('end', function() {
            console.log("ended");
        }); 
    });
    reqCoap.end();
};

with this code it only returns the code sometimes but most times it doesn't return the data.

Can you please help me with this?

[mcollina]

Are you sure the version of CoAP running on your Contiki installation is the RFC version (draft-18)?

It was merged in at the end of last may: https://github.com/contiki-os/contiki/pull/507.

[mcollina]

Can you reproduce the problem using Firefox Copper, or some other implementation that it easier to work with?

[mcollina]

Closing as not updated.