Sending udp packets and listening data from the broadcast address using GCDAsyncudpSocket.
It is working fine when I run the application from the debugger mode from mac OS X Yosmite(Xcode -> device ipad air 8.2). It is not working when I install the IPA in the device.
Here is the following code I have used: ****send****
GCDAsyncUdpSocket * udpSocket = [[GCDAsyncUdpSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
NSError *error = nil;
NSTimeInterval timeout= 1;
// Send the broadcast request, ie "Any upnp devices out there?"
char request[35];
request[0] = (Byte) 0xAA;
request[1] = (Byte) 0xAA;
request[sizeof(request)-2] = (Byte)0x55;
request[sizeof(request)-1] = (Byte)0x55;
NSData *data = [NSData dataWithBytes:request length:sizeof(request)];
UInt16 port=2918;
NSLog(@"begin scan");
if (![udpSocket bindToPort:port error:&error])
{
NSLog(@"Error binding: %@", error);
return;
}
if (![udpSocket beginReceiving:&error])
{
NSLog(@"Error receiving: %@", error);
return;
}
if (![udpSocket enableBroadcast:YES error:&error]) {
NSLog(@"Error enableBroadcast: %@",error);
return;
}
[udpSocket enableBroadcast:YES error: &error];
[udpSocket setIPv4Enabled:YES];
[udpSocket setIPv6Enabled:NO];
[udpSocket sendData :data toHost:[self getBroadcastAdress] port:port withTimeout:timeout tag:0];
To receive :
- (void)udpSocket:(GCDAsyncUdpSocket *)sock didReceiveData:(NSData *)data
fromAddress:(NSData *)address withFilterContext:(id)filterContext
{
NSString *msg = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSString *host = nil;
uint16_t port = 0;
[GCDAsyncUdpSocket getHost:&host port:&port fromAddress:address];
if(![host containsString:deviceIPAddress])
// if ([host rangeOfString:deviceIPAddress].location == NSNotFound)
{
{
if(![discoveredIPAddress contains Object:[[host componentsSeparatedByString:@":"] last Object]])
[discoveredIPAddress add Object:[[host componentsSeparatedByString:@":"] last Object]];
N Slog(@"Printer IP: %@", discoveredIPAddress);
}
}
}
Immediate help will be appreciated. Thanks
