iOS开发:从NSReadStream获取专用IP和端口
我正在为iOS开发一个应用程序。在我的应用程序中,有一个到服务器的工作TCP连接,通过iOS开发:从NSReadStream获取专用IP和端口,ios,sockets,nsstream,cfsocket,Ios,Sockets,Nsstream,Cfsocket,我正在为iOS开发一个应用程序。在我的应用程序中,有一个到服务器的工作TCP连接,通过NSStreams实现。现在我需要连接使用的端口,它会产生一些问题 我可以通过迭代设备的接口来获取IP,但是对于端口号,我必须从套接字获取信息。在下面的代码中,我尝试从工作中获取套接字并打开NSInputStream\u readstream。问题是,CFSocketCopyAddress为零,我看不出原因。你能找其他人吗 非常感谢您的帮助 // Initializing some variables we n
NSStreams
实现。现在我需要连接使用的端口,它会产生一些问题
我可以通过迭代设备的接口来获取IP,但是对于端口号,我必须从套接字获取信息。在下面的代码中,我尝试从工作中获取套接字并打开NSInputStream\u readstream
。问题是,CFSocketCopyAddress
为零,我看不出原因。你能找其他人吗
非常感谢您的帮助
// Initializing some variables we need
CFSocketContext context;
memset(&context, 0, sizeof(context));
context.info = (__bridge void*)self;
NSString *property = @"kCFStreamPropertySocketNativeHandle";
// Get hands on the used socket via the socket native handle
CFSocketNativeHandle *socketNativeHandle = (CFSocketNativeHandle*)CFReadStreamCopyProperty((__bridge CFReadStreamRef)(_readStream), (__bridge CFStringRef)(property));
CFSocketRef cfSocket = CFSocketCreateWithNative(NULL, *socketNativeHandle, kCFSocketNoCallBack, nil, &context);
// Ask the socket for the address information
CFDataRef dataRef = CFSocketCopyAddress(cfSocket); // dataRef is always nil :(
struct sockaddr_in *sockaddr = (struct sockaddr_in*)CFDataGetBytePtr(dataRef);
int portnumber = sockaddr->sin_port;
好了,这对我来说很有用。也许我可以帮助来自谷歌或其他地方的人
- (NSNumber*) getPortnumber{
int port = -1;
CFSocketContext context;
memset(&context, 0, sizeof(context));
context.info = (__bridge void*)self;
// Get Socket native handle from existing stream
CFDataRef socketData = CFWriteStreamCopyProperty((__bridge CFWriteStreamRef)(_writeStream), kCFStreamPropertySocketNativeHandle);
// Get the native handle
CFSocketNativeHandle handle;
CFDataGetBytes(socketData, CFRangeMake(0, sizeof(CFSocketNativeHandle)), &handle);
// Get the socket
CFSocketRef cfSocket = CFSocketCreateWithNative(NULL, handle, kCFSocketNoCallBack, nil, &context);
// CFSocketCopyAddress will return the address of the socket
CFDataRef dataRef = CFSocketCopyAddress(cfSocket);
struct sockaddr_in *sockaddr = (struct sockaddr_in*)CFDataGetBytePtr(dataRef);
// Get the port from the address information
port = sockaddr->sin_port;
// Output Objective-C friendly =)
NSNumber *portnr = [NSNumber numberWithInt:port];
return portnr;
}