Hi all,
I'm hoping someone on the list can help. Beginning with Tiger and
continuing on OS X 10.4.1, my resolve callback no longer gets
called when I call CFNetServiceResolve in asynchronous mode. This
had been working fine through previous system versions. I'm not
doing anything fancy - most of the code is almost straight from one
of Apple's samples.
I've tried searching the archives for CFNetServiceResolve to no avail.
Here's the relevant code:
CFNetServiceClientContext clientContext = { 0, this, NULL, NULL,
NULL };
CFStreamError error;
CFStringRef svcName = /* a name obtained from browsing
services */;
CFNetServiceRef resolveSvc = CFNetServiceCreate
(kCFAllocatorDefault, kDomainStr,
mServiceTypeStr, svcName, 0);
if (resolveSvc == NULL)
return;
if (CFNetServiceSetClient(resolveSvc, MyResolveCallback,
&clientContext))
{
CFNetServiceScheduleWithRunLoop(resolveSvc, CFRunLoopGetCurrent
(), kCFRunLoopCommonModes);
bool resolutionStarted;
if (TigerOrLater())
resolutionStarted = CFNetServiceResolveWithTimeout
(resolveSvc, (CFTimeInterval)20, &error);
else
resolutionStarted = CFNetServiceResolve(resolveSvc, &error);
if (resolutionStarted)
{
CFRunLoopRun();
}
else
{
// Something went wrong so lets clean up.
CFNetServiceUnscheduleFromRunLoop(resolveSvc,
CFRunLoopGetCurrent(), kCFRunLoopCommonModes);
CFNetServiceSetClient(resolveSvc, NULL, NULL);
CFRelease(resolveSvc);
}
}
MyResolveCallback (which never gets called) is declared like this:
void MyResolveCallback(CFNetServiceRef service, CFStreamError* /
*error*/, void* info);
I had heard there were differences between CFNetServiceResolve and
the newer WithTimeout version. I only added the check for
TigerOrLater() and the call to the WithTimeout variant after this
stopped working. Oddly, that one always returns false while
CFNetServiceResolve returns true. The call to CFRunLoopRun was also
added afterwards during my attempts to find out what's going wrong
here. Also, it doesn't seem to matter if the given name contains
any punctuation or other characters. The code continues to work
fine on Panther...
Thanks in advance for any help. I hope someone spots something
obvious. I'm at a little bit of a loss :)
Ken
--
Ken Worley, Software Engineer, Tiberius, Inc.
http://www.worleyphoto.com
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