Iq type get without request

Vasyl_Pryimak · October 15, 2019, 10:37am

Hello!
I’m getting from Openfire Iq type get without request like:
<iq to="testuser@mydomain.com" from="testuser@myof.com/Spark" type="get"></iq>

What does it mean? What should I do with that iq?
On xmpp specification there are no explanation about such iq’s:
https://xmpp.org/rfcs/rfc3920.html#stanzas-semantics
get – The stanza is a request for information or requirements.

Smack library can’t parse such iq and gets NullPointerException on this line:

github.com

igniterealtime/Smack/blob/4.2/smack-core/src/main/java/org/jivesoftware/smack/util/PacketParserUtils.java#L668


            break;
        case result:
            iqPacket = new EmptyResultIQ();
            break;
        default:
            break;
        }
    }


    // Set basic values on the iq packet.
    iqPacket.setStanzaId(id);
    iqPacket.setTo(to);
    iqPacket.setFrom(from);
    iqPacket.setType(type);
    iqPacket.setError(error);


    return iqPacket;
}


/**
 * Parse the available SASL mechanisms reported from the server.

Please assist.
Thanks in advance!

Best regards,
Vasyl

guus · October 15, 2019, 11:50am

Openfire doesn’t send ‘empty’ IQ stanzas like that by default. The addressing in the example that you give suggest that it is sent by Spark (which also would be very strange). Can you reproduce this behavior with other clients? Can you rule out that custom code is causing this?

Vasyl_Pryimak · October 16, 2019, 8:57am

Thanks for quick response! Yes, I meant Spark client.

Can you reproduce this behavior with other clients?

No, it’s only Spark.

which also would be very strange

Yes, indeed.

So what should I respond to this iq?

Cus for now I skipping it, but I interested why I’m getting such iq

guus · November 22, 2019, 9:30am

The XMPP specifications (RFC6120) state:

An entity that receives an IQ request of type “get” or “set” MUST reply with an IQ response of type “result” or “error” (…)

and also:

An IQ stanza of type “get” or “set” MUST contain exactly one child element, which specifies the semantics of the particular request.

If you receive an IQ stanza of type “get” or “set” that does not contain a child element, the proper thing to do is to return an error.