local vs remote socket connections on iphone - iphone

Question

I want to send OSC messages from iphone to another programme (max/msp) by creating and connecting to a udp socket. this works from the iphone simulator, i.e. when both apps are running on the same computer but not when i install the app on the phone itself.
I think the problem could be with specifying the IP of the remote computer. I am using the sockaddr_in struct to specify IP and port info. when i run the code in the simulator it is fine to specify the IP as INADDR_ANY:
sin_addr.s_addr = INADDR_ANY;
when i run it on the device i'm trying to convert my IP into a hexidecimal number and specifying that instead of INADDR_ANY. This doesn't work for either the simulator or the device.
The console shows that the the socket is connecting and sending data fine but the remote programme (max/msp) doesn't receive any data at all.
I have tried importing the right frameworks so that it should work on both device and simulator.
the full code follows:
import "UDPSocketCreate.h"
#implementation UDPSocketCreate
-(id)init
{
in_addr_t myAddress = 0xC0A80145;
if(self =[super init])
{
//addr is an instance variable of type struct sockaddr_in
memset(&addr, 0, sizeof(addr));
addr.sin_len = sizeof(addr);
addr.sin_family = PF_INET;
addr.sin_port = htons(3333);
addr.sin_addr.s_addr = myAddress;INADDR_ANY
connectAddr = CFDataCreate(NULL, (unsigned char *)&addr, sizeof(addr));
OSC_initBuffer(&myOSCBuff, sizeof(packetBuffer), packetBuffer);
NSString *address = #"/test";
const char *utf8Address = [address UTF8String];
int addressResult = OSC_writeAddress(&myOSCBuff, (char*)utf8Address);
}
return self;
}
CFSocketRef udpSocket;
// this method is called from app delegate after init
-(void)createUDPSocketRef
{
udpSocket = CFSocketCreate(NULL, PF_INET, SOCK_DGRAM, IPPROTO_UDP, kCFSocketWriteCallBack, myCallBack, NULL);
if(udpSocket == NULL)
{
NSLog(#"socket create failed");
return;
}
CFRunLoopSourceRef runLoopSrceRef = CFSocketCreateRunLoopSource(NULL, udpSocket, 1);
CFRunLoopRef rl = CFRunLoopGetCurrent();
CFRunLoopAddSource(rl, runLoopSrceRef, kCFRunLoopCommonModes);
}
// pressing a button on the UI triggers this method
-(void)bang
{
int myInt = 1;
int writeRestult = OSC_writeIntArg(&myOSCBuff, myInt);
int buffDoneResult;
if (buffDoneResult = OSC_isBufferDone(&myOSCBuff))
{
NSLog(#"valid message in buff");
char *pack = OSC_getPacket(&myOSCBuff);
int packSize = OSC_packetSize(&myOSCBuff);
CFDataRef OSCPacketWithAddressTest = CFDataCreate(NULL, pack, packSize);
CFSocketError sendError = CFSocketSendData(udpSocket, connectAddr, OSCPacketWithAddressTest, 30);
NSLog(#"send error: %d", sendError);
}
OSC_resetBuffer(&myOSCBuff);
NSString *address = #"/test";
const char *utf8Address = [address UTF8String];
int addressResult = OSC_writeAddress(&myOSCBuff, (char*)utf8Address);
}
#end
any help would be greatly appreciated

Answer 1

Change;
in_addr_t myAddress = 0xC0A80145
to
in_addr_t myAddress = inet_addr("192.168.1.2");
or whatever that IP is.
S.

Answer 2

Unless I misunderstood you are trying to connect with INADDR_ANY as server address. INADDR_ANY is only for listening server to tell the IP stack that it wants to listen on any network interface (versus a specific interface on a multi-homed machine.) The client needs explicit server address of the server to send packets to. Look into inet_pton function for how to convert IP address from character string to network representation.