iphone socket disconnecting after 1 min - iphone

Question

We have following code for connecting to our server. This is part of iPhone App.
Problem is that recv(CFSocketGetNative(inSocketRef), &length, sizeof(length), 0);
call returns 0 after exactly 60 sec. We are not sending anything from server. I want it to wait for data or disconnection (either server or client initiated). However, it always returns after 60 sec.
What am I doing wrong here?
void CallbackHandlerConnectionHandler(CFSocketRef inSocketRef, CFSocketCallBackType inType,
CFDataRef inAddress, const void *inData, void *inInfo)
{
ChatServerConnectionHandler *conHandler = (ChatServerConnectionHandler *)inInfo;
if([conHandler respondsToSelector:#selector(dataRecievedFromServer:)])
{
int res = 0;
SInt32 length;
res = recv(CFSocketGetNative(inSocketRef), &length, sizeof(length), MSG_PEEK);
if(0 >= res || (length < 0))
{
//Disconnect the connection, as some has occcured in the sockets..
[conHandler performSelector:#selector(errorEncountered)];
NSLog(#"Error occured in server!!");
return;
}
printf ("good data")
}
}
-(BOOL) connectToServer:(NSString *)ipAddress Port:(int)portNumber
{
connectionState = eConnectionEstablishInProgress;
self.threadStopped = NO;
CFRunLoopSourceRef source;
int sockfd;
struct sockaddr_in serv_addr;
struct hostent *host;
host = gethostbyname([ipAddress cStringUsingEncoding:NSUTF8StringEncoding]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
struct timeval timeout;
if (sockfd < 0)
{
error("ERROR opening socket");
connectionState = eNoConnection;
return NO;
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(portNumber);
serv_addr.sin_addr = *((struct in_addr *)host->h_addr);
bzero(&(serv_addr.sin_zero),8);
/* Creates a CFSocket object for a pre-existing native socket */
CFSocketContext socketContext={0,self,NULL,NULL,NULL};
socketRef = CFSocketCreateWithNative(kCFAllocatorDefault,
sockfd,
kCFSocketReadCallBack,
CallbackHandlerConnectionHandler,
&socketContext);
source = CFSocketCreateRunLoopSource(NULL, socketRef, 0);
CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopDefaultMode);
CFRelease(source);
source = nil;
InstallSignalHandlers();
CFDataRef socketAddress;
socketAddress = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, (UInt8 *)&serv_addr, sizeof(serv_addr), kCFAllocatorNull);
CFSocketError result=CFSocketConnectToAddress(socketRef, socketAddress, 0);
CFRelease(socketAddress);
if(kCFSocketSuccess == result)
{
//printf("Socket connection established");
self.serverRunning = YES;
connectionState = eConnectionEstablised;
NSLog(#"\nCall Connection accepted callback.");
if([delegate respondsToSelector:#selector(conectionEstablishedWithTheServer)])
{
[delegate performSelector:#selector(conectionEstablishedWithTheServer)];
}
}
else
{
//printf("Unable to create socket why???***");
connectionState = eNoConnection;
if(socketRef)
CFRelease(socketRef);
socketRef = nil;
return NO;
}
while(FALSE == self.threadStopped)
{
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 1, FALSE);
}
NSLog(#"\nOut of Server socket connection thread.");
self.serverRunning = NO;
if([delegate respondsToSelector:#selector(conectionFinishedWithServer)])
{
[delegate performSelector:#selector(conectionFinishedWithServer)];
}
if(socketRef)
{
if(CFSocketIsValid(socketRef))
CFSocketInvalidate(socketRef);
}
return YES;
}

Answer 1

This looks like a server problem - or rather functionality: closing inactive connections to keep enough free resources.
If you didn't write the server code try to contact the author.
The packet you mention [FIN, ACK] is a packet that closes your socket: you should check the IP adresses but the server is most probably the initiator of this packet.