How to receive data from APNS feedback server in objective c - ios

Question

Hello I'm trying to to something rather simple I think.
I have made an cocoa application that sends data using APNS, getting the tokens from my database, everything is set up and running perfect.
Now I want to check the APNS feedback server and remove any tokens received from my database.
I have found dozens of examples in php, javascript and so forth, but nothing in Objective C. I have read the programming guide from apple but can't figure out how to do it.
I am establishing a connection to APNS feedback but I don't know how to read the data.
I'm new to cocoa so please explain in detail :)
This is how I connect to the feedback server, it's the same way I connect when sending, just using another host.
- (void)connectToFeedBackServer
{
if(self.certificate == nil)
{
return;
}
NSString *feedBackHost = #"feedback.push.apple.com";
const char *cHost = [feedBackHost UTF8String];
NSLog(#"The size of cHost is: %lu", strlen(cHost));
NSLog(#"Host is: %s", cHost);
// Define result variable.
OSStatus result;
// Establish connection to server.
PeerSpec peer;
result = MakeServerConnection(cHost, 2196, &socket, &peer);
//NSLog(#"MakeServerConnection(): %d", result);
// Create new SSL context.
result = SSLNewContext(false, &context); //NSLog(#"SSLNewContext(): %d", result);
// Set callback functions for SSL context.
result = SSLSetIOFuncs(context, SocketRead, SocketWrite);
// NSLog(#"SSLSetIOFuncs(): %d", result);
// Set SSL context connection.
result = SSLSetConnection(context, socket);
// NSLog(#"SSLSetConnection(): %d", result);
// Set server domain name.
//result = SSLSetPeerDomainName(context, cHost, sizeof(cHost));
NSLog(#"SSLSetPeerDomainName(): %d", result);
result = SSLSetPeerDomainName(context, cHost, strlen(cHost));
result = SecIdentityCopyCertificate(_theIdentity, &(certificate));
// Set client certificate.
CFArrayRef certificates = CFArrayCreate(NULL, (const void **)&_theIdentity, 1, NULL);
result = SSLSetCertificate(context, certificates);// NSLog(#"SSLSetCertificate(): %d", result);
CFRelease(certificates);
// Perform SSL handshake.
do
{
result = SSLHandshake(context); NSLog(#"SSLHandshake(): %d", result);
} while(result == errSSLWouldBlock);
}
And how I try to read the data and save the received the tokens in an array
- (NSMutableArray *)CheckFeedBackServer
{
char feedback[38];
size_t feedBackSize = sizeof(feedback);
size_t processed = 0;
NSMutableData *feedbackData = [[NSMutableData alloc]init];
NSString *token = [[NSString alloc]init];
NSMutableArray *tokenArray = [[NSMutableArray alloc]init];
[self connectToFeedBackServer];
while ([self getSSLContext])
{
int bytesLength = SSLRead([self getSSLContext], &feedback, feedBackSize, &processed);
[feedbackData appendBytes:feedback length:bytesLength];
while ([feedbackData length] > 38)
{
NSData *deviceToken = [NSData dataWithBytes:[feedbackData bytes] + 6 length:32];
token = [self deviceTokenToString:deviceToken];
[tokenArray addObject:token];
[feedbackData replaceBytesInRange: NSMakeRange(0, 38) withBytes: "" length: 0];
}
}
return tokenArray;
}
- (NSString *)deviceTokenToString: (NSData *)deviceToken;
{
NSString *tmpToken = [NSString stringWithFormat:#"%#", deviceToken];
NSUInteger loc_begin = [tmpToken rangeOfString: #"<"].location+1;
NSUInteger loc_end = [tmpToken rangeOfString: #">"].location-1;
return [tmpToken substringWithRange: NSMakeRange(loc_begin, loc_end)];
}

Answer 1

Just if anyone need to do something similar I solved my problem like this.
I use Apples ioSock class, and I have set the certificate in my code by calling the keychain
First I connect to the feedback server with this code
- (void)connectToFeedBackServer
{
if(self.certificate == nil)
{
return;
}
// Get the global variable feedbackHost and make it to a char
const char *cHost = [feedbackHost UTF8String];
NSLog(#"The size of cHost is: %lu", strlen(cHost));
NSLog(#"Host is: %s", cHost);
// Define result variable.
OSStatus result;
// Establish connection to server.
PeerSpec peer;
result = MakeServerConnection(cHost, 2196, &socket, &peer);
// Create new SSL context.
result = SSLNewContext(false, &context);
// Set callback functions for SSL context.
result = SSLSetIOFuncs(context, SocketRead, SocketWrite);
// Set SSL context connection.
result = SSLSetConnection(context, socket);
// Set server domain name.
result = SSLSetPeerDomainName(context, cHost, strlen(cHost));
result = SecIdentityCopyCertificate(_theIdentity, &(certificate));
// Set client certificate.
CFArrayRef certificates = CFArrayCreate(NULL, (const void **)&_theIdentity, 1, NULL);
result = SSLSetCertificate(context, certificates);
CFRelease(certificates);
do
{
result = SSLHandshake(context); NSLog(#"SSLHandshake(): %d", result);
} while(result == errSSLWouldBlock);
}
And then I read the feedback data and add the tokens to an array, like this
- (NSMutableArray *)CheckFeedBackServer
{
OSStatus result;
NSMutableArray *feedbackTokens = [[NSMutableArray alloc]init];
// Retrieve message from SSL.
size_t processed = 0;
char buffer[38];
do
{
// Fetch the next item
result = SSLRead(context, buffer, 38, &processed);
if (result) break;
char *b = buffer;
// Recover Device ID
NSMutableString *deviceID = [NSMutableString string];
b += 6;
for (int i = 0; i < 32; i++)
{
[deviceID appendFormat:#"%02x", (unsigned char)b[i]];
}
[feedbackTokens addObject:deviceID];
} while (processed > 0);
return feedbackTokens;
}