wxServDisc is a simple to use C++ dropin-class/ library to facilitate Zeroconf service discovery in any wxWidgets application, without any other dependencies than wxWidgets. It works under UNIX, Mac OS X and Windows. A sample app is included.
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README.md

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wxServDisc - a wxwidgets zeroconf service discovery module

API:

// type can be one of QTYPE_A, QTYPE_NS, QTYPE_CNAME, QTYPE_PTR or QTYPE_SRV  
wxServDisc(void* parent, const wxString& what, int type);
~wxServDisc();

// yeah well...
std::vector<wxSDEntry> getResults() const;
size_t getResultCount() const;

// get query name
const wxString& getQuery() const { const wxString& ref = query; return ref; };
// get error string
const wxString& getErr() const { const wxString& ref = err; return ref; };

Typically you would do a three-stage query when looking up the address of a service instance (look into sdwrap sample to see how it's done...):

wxServDisc *servscan = new wxServDisc(this, wxT("_rfb._tcp.local."), QTYPE_PTR);
wxServDisc namescan(0, servscan->getResults().at(0).name, QTYPE_SRV);
wxServDisc addrscan(0, namescan.getResults().at(0).name;, QTYPE_A);
wxString addr = addrscan.getResults().at(0).ip;

Ah yes and a wxServDisc instance sends a custom event when sth. is discovered. so you have to add it to your event table, if you want to use it:

// map recv of wxServDiscNOTIFY to some method
BEGIN_EVENT_TABLE(MyFrameMain, FrameMain)
   EVT_COMMAND  (wxID_ANY, wxServDiscNOTIFY, MyFrameMain::onSDNotify)
END_EVENT_TABLE()

In that event listener function, you can then call getResults().

wxServDisc uses mdnsd (C) Jer jer@jabber.org internally.

BUILDING:

Prerequisites: wxWidgets >= 2.8

wxServDisc uses CMake as its build system. Thus, it's the usual:

mkdir build
cd build
cmake ..
make

from the root of the source tree.

That's it, have fun!

christian beier dontmind@freeshell.org