RX_PROP_QUERY

When someone's server or client requests one of your own properties, your client will receive an RX_PROP_QUERY message. You can then decide whether your client should answer the request.

The format for an RX_PROP_QUERY message is:

RX_PROP_QUERY address property

where

address	is the (apparent) address of the interested party and
property	is an envelop whose data field identifies the property being queried.

Upon receiving this message, your client should decode the envelop and determine whether or not it wishes to reveal the requested property. Four actions can result:

1. Your client can reveal the requested property by returning its value to the requesting party. It does this using the TX_PROP_ANNOUNCE message.
2. Your client can lie about the requested property by returning a false value. Again, it does this using the TX_PROP_ANNOUNCE message.
3. Your client can openly refuse to reveal the requested property by issuing a TX_PROP_DENIED message.
4. Your client can ignore the request and remain silent on the issue.

Note that because the fourth option is possible, and because property announces can arrive even without prior queries, a property query is less like a function call with a return value and more like an invitation to announce a property.