Async CFStream networking with runloop
I am trying to implement async tcp networking with runloop. currently I manage to connect, but when I try to send something I get that -1 bytes have been written - but CFWriteStreamCopyError returns null.
code sample below, first function connects, second send a simple message. any help will be appreciated, including random bug spotting (I am new to objective-c and to iphone development in general).
struct header
{
uint32_t length;
uint32_t type;
} header;
- (void) connect
{
NSLog(@"Attempting to (re)connect to %@:%d", m_host, m_port);
while(TRUE)
{
CFHostRef host = CFHostCreateWithName(kCFAllocatorDefault, (CFStringRef)m_host);
if (!host)
{
NSLog(@"Error resolving host %@", m_host);
[NSThread sleepForTimeInterval:5.0];
continue;
}
CFStreamCreatePairWithSocketToCFHost(kCFAllocatorDefault, host , m_port, &m_in, &m_out);
CFRelease(host);
if (!m_in)
{
NSLog(@"Error");
}
CFStreamClientContext context = {0, self,nil,nil,nil};
if (CFReadStreamSetClient(m_in, kCFStreamEventHasBytesAvailable | kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered, networkReadEvent, &context))
{
CFReadStreamScheduleWithRunLoop(m_in, CFRunLoopGetCurrent(),kCFRunLoopCommonModes);
}
if (CFWriteStreamSetClient(m_out, kCFStreamEventErrorOccurred | kCFStreamEventEndEncountered, networkWriteEvent, &context))
{
CFWriteStreamScheduleWithRunLoop(m_out, CFRunLoopGetCurrent(),kCFRunLoopCommonModes);
}
BOOL success = CFReadStreamOpen(m_in);
CFErrorRef error = CFReadStreamCopyError(m_in);
if (!success || (error && CFErrorGetCode(error) != 0))
{
NSLog(@"Connect error %s : %d", CFErrorGetDomain(error), CFErrorGetCo开发者_JS百科de(error));
[NSThread sleepForTimeInterval:5.0];
}
else
{
NSLog(@"Connected");
break;
}
}
[self startSession];
}
- (void) startSession
{
struct header hh;
hh.type = RTR_CREATE_SESSION;
hh.length = 0;
CFIndex res = CFWriteStreamWrite(self.m_out, (const UInt8*)&hh, sizeof(hh));
NSLog(@"Written %d", res);
CFErrorRef error = CFWriteStreamCopyError(self.m_out);
if (error)
{
NSLog(@"Read error %s : %d", CFErrorGetDomain(error), CFErrorGetCode(error));
CFRelease(error);
}
}
figured it out, I forgot to open the write stream as well:
CFWriteStreamOpen(m_out);
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