带XML的Boxee UDP广播发现API (远程)

Question

我正在尝试使用Boxee Remote Control Interface发送UDP广播来发现设备。

当前使用AsyncUdpSocket，但在发送请求时，我只是将请求作为响应返回，而不是获得预期的响应。

这是我的代码，我是否遗漏了什么？：

- (void)viewDidLoad
{
    [super viewDidLoad];

    AsyncUdpSocket *socket  = [[AsyncUdpSocket alloc] initWithDelegate:self];
    [socket enableBroadcast:YES error:nil];
    [socket bindToPort:2562 error:nil];

    NSString *xml           = @"<?xml version=\"1.0\"?><BDP1 cmd=\"discover\" application=\"iphone_remote\" challenge=\"shittycitttyy123\" signature=\"cdddac43fdbce83d24b7c1ca5149c697\"/>";


    NSData *data            = [xml dataUsingEncoding:NSUTF8StringEncoding];

    if([socket sendData:data toHost:@"10.0.0.255" port:2562 withTimeout:3 tag:0]){
        [socket receiveWithTimeout:2 tag:0];
    }
}

-(BOOL)onUdpSocket:(AsyncUdpSocket *)sock didReceiveData:(NSData *)data withTag:(long)tag fromHost:(NSString *)host port:(UInt16)port{
    NSLog(@"Got data %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

    return YES;
}

Answer 1

我认为您的问题在于您的代码只准备接收单个数据包。您正在发送一个广播数据包，这样本地网络上的所有设备都会收到该数据包，包括您自己的设备。此外，尽管我知道这只是测试代码，但网络上可能有多个Boxee盒子，因此您可以预期可能会有多个回复。

试试这样的东西-

 (void)viewDidLoad
{
    [super viewDidLoad];

    AsyncUdpSocket *socket  = [[AsyncUdpSocket alloc] initWithDelegate:self];
    [socket enableBroadcast:YES error:nil];
    [socket bindToPort:2562 error:nil];

    NSString *xml           = @"<?xml version=\"1.0\"?><BDP1 cmd=\"discover\" application=\"iphone_remote\" challenge=\"shittycitttyy123\" signature=\"cdddac43fdbce83d24b7c1ca5149c697\"/>";


    NSData *data            = [xml dataUsingEncoding:NSUTF8StringEncoding];

    if([socket sendData:data toHost:@"10.0.0.255" port:2562 withTimeout:3 tag:0]){
        [socket receiveWithTimeout:2 tag:0];
    }
}

-(BOOL)onUdpSocket:(AsyncUdpSocket *)sock didReceiveData:(NSData *)data withTag:(long)tag fromHost:(NSString *)host port:(UInt16)port{
    NSLog(@"Got data %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);

    //TODO - process incoming packet and determine if it is a Boxee response

    [socket receiveWithTimeout:2 tag:tag+1];  //Look for more data
    return YES;
}

- (void)onUdpSocket:(AsyncUdpSocket *)sock didNotReceiveDataWithTag:(long)tag dueToError:(NSError *)error
{
   NSLog(@"Did not receive data");  
   //TODO check error and take appropriate action
}