Get IP & Port

Get IP & Port

**For Port :-

- (int) getPort {

    CFSocketContext socketCtxt = {0, (__bridge void *)(self), NULL, NULL, NULL};

    

    // Start by trying to do everything with IPv6.  This will work for both IPv4 and IPv6 clients

    // via the miracle of mapped IPv4 addresses.

    

    CFSocketRef witap_socket = CFSocketCreate(kCFAllocatorDefault, PF_INET6, SOCK_STREAM, IPPROTO_TCP, kCFSocketAcceptCallBack, nil, &socketCtxt);

    uint32_t protocolFamily;

    

    if (witap_socket != NULL)   // the socket was created successfully

    {

        protocolFamily = PF_INET6;

    } else // there was an error creating the IPv6 socket - could be running under iOS 3.x

    {

        witap_socket = CFSocketCreate(kCFAllocatorDefault, PF_INET, SOCK_STREAM, IPPROTO_TCP, kCFSocketAcceptCallBack, nil, &socketCtxt);

        if (witap_socket != NULL)

        {

            protocolFamily = PF_INET;

        }

    }

    

    /*if (NULL == witap_socket) {

     if (error) *error = [[NSError alloc] initWithDomain:TCPServerErrorDomain code:kTCPServerNoSocketsAvailable userInfo:nil];

     if (witap_socket) CFRelease(witap_socket);

     witap_socket = NULL;

     return NO;

     }*/

    

    

    int yes = 1;

    setsockopt(CFSocketGetNative(witap_socket), SOL_SOCKET, SO_REUSEADDR, (void *)&yes, sizeof(yes));

    

    // set up the IP endpoint; use port 0, so the kernel will choose an arbitrary port for us, which will be advertised using Bonjour

    if (protocolFamily == PF_INET6)

    {

        struct sockaddr_in6 addr6;

        memset(&addr6, 0, sizeof(addr6));

        addr6.sin6_len = sizeof(addr6);

        addr6.sin6_family = AF_INET6;

        addr6.sin6_port = 0;

        addr6.sin6_flowinfo = 0;

        addr6.sin6_addr = in6addr_any;

        NSData *address6 = [NSData dataWithBytes:&addr6 length:sizeof(addr6)];

        

        CFSocketSetAddress(witap_socket, (CFDataRef)address6);

        /*if (kCFSocketSuccess != CFSocketSetAddress(witap_socket, (CFDataRef)address6)) {

         if (error) *error = [[NSError alloc] initWithDomain:TCPServerErrorDomain code:kTCPServerCouldNotBindToIPv6Address userInfo:nil];

         if (witap_socket) CFRelease(witap_socket);

         witap_socket = NULL;

         return NO;

         }*/

        

        // now that the binding was successful, we get the port number

        // -- we will need it for the NSNetService

        NSData *addr = (NSData *)CFBridgingRelease(CFSocketCopyAddress(witap_socket));

        memcpy(&addr6, [addr bytes], [addr length]);

        return ntohs(addr6.sin6_port);

        

    } else {

        struct sockaddr_in addr4;

        memset(&addr4, 0, sizeof(addr4));

        addr4.sin_len = sizeof(addr4);

        addr4.sin_family = AF_INET;

        addr4.sin_port = 0;

        addr4.sin_addr.s_addr = htonl(INADDR_ANY);

        NSData *address4 = [NSData dataWithBytes:&addr4 length:sizeof(addr4)];

        

        CFSocketSetAddress(witap_socket, (CFDataRef)address4);

        /*if (kCFSocketSuccess != CFSocketSetAddress(witap_socket, (CFDataRef)address4)) {

         if (error) *error = [[NSError alloc] initWithDomain:TCPServerErrorDomain code:kTCPServerCouldNotBindToIPv4Address userInfo:nil];

         if (witap_socket) CFRelease(witap_socket);

         witap_socket = NULL;

         return NO;

         }*/

        

        // now that the binding was successful, we get the port number 

        // -- we will need it for the NSNetService

        NSData *addr = (NSData *)CFBridgingRelease(CFSocketCopyAddress(witap_socket));

        memcpy(&addr4, [addr bytes], [addr length]);

        return ntohs(addr4.sin_port);

    }

    

}

**For Internal IP :-

- (NSString *)getIPAddress {

    

    NSString *address = @"error";

    struct ifaddrs *interfaces = NULL;

    struct ifaddrs *temp_addr = NULL;

    int success = 0;

    // retrieve the current interfaces - returns 0 on success

    success = getifaddrs(&interfaces);

    if (success == 0) {

        // Loop through linked list of interfaces

        temp_addr = interfaces;

        while(temp_addr != NULL) {

            if(temp_addr->ifa_addr->sa_family == AF_INET) {

                // Check if interface is en0 which is the wifi connection on the iPhone

                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {

                    // Get NSString from C String

                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];

                    

                }

                

            }

            

            temp_addr = temp_addr->ifa_next;

        }

    }

    // Free memory

    freeifaddrs(interfaces);

    return address;

    

}

**For External IP :-

-(NSString*)getIP

{

    NSUInteger  an_Integer;

    NSArray * ipItemsArray;

    NSString *externalIP;

    

    NSURL *iPURL = [NSURL URLWithString:@"http://www.dyndns.org/cgi-bin/check_ip.cgi"];

    

    if (iPURL) {

        NSError *error = nil;

        NSString *theIpHtml = [NSString stringWithContentsOfURL:iPURL encoding:NSUTF8StringEncoding error:&error];

        if (!error) {

            NSScanner *theScanner;

            NSString *text = nil;

            

            theScanner = [NSScanner scannerWithString:theIpHtml];

            

            while ([theScanner isAtEnd] == NO) {

                

                // find start of tag

                [theScanner scanUpToString:@"<" intoString:NULL] ;

                

                // find end of tag

                [theScanner scanUpToString:@">" intoString:&text] ;

                

                // replace the found tag with a space

                //(you can filter multi-spaces out later if you wish)

                theIpHtml = [theIpHtml stringByReplacingOccurrencesOfString:

                             [ NSString stringWithFormat:@"%@>", text]

                                                                 withString:@" "] ;

                ipItemsArray =[theIpHtml  componentsSeparatedByString:@" "];

                an_Integer=[ipItemsArray indexOfObject:@"Address:"];

                externalIP =[ipItemsArray objectAtIndex:  ++an_Integer];

            }

            NSLog(@"%@",externalIP);

        } else {

            NSLog(@"Oops... g %ld, %@", (long)[error code], [error localizedDescription]);

        }

    }

    return externalIP;

}