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POSpeak to a device using TCP/IP
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  1. POSpeak to a device using TCP/IP
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    copied!<p>I try to open a TCP stream to speak to a device with a cocoa app. I searched the web and found that there is some possibilities to do that but i'm a little bit stuck.</p> <p>I decided to use the NSStream way (because it's referenced in cocoa-touch, will be usefull if i want to port my app to iPhone i presume), so here is my code:</p> <pre><code>@implementation AppDelegate - (IBAction)connect:(id)sender { [NSStream getStreamsToHost:"192.168.1.4" port:23 inputStream:&amp;inputStream outputStream:&amp;outputStream]; [inputStream setDelegate:self]; [outputStream setDelegate:self]; [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [inputStream open]; [outputStream open]; } // Both streams call this when events happen - (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode { if (aStream == inputStream) { [self handleInputStreamEvent:eventCode]; } else if (aStream == outputStream) { [self handleOutputStreamEvent:eventCode]; } } - (void)handleInputStreamEvent:(NSStreamEvent)eventCode { switch (eventCode) { case NSStreamEventHasBytesAvailable:[self readBytes]; break; case NSStreamEventOpenCompleted: // Do Something break; default: case NSStreamEventErrorOccurred: NSLog(@"An error occurred on the input stream."); break; } } </code></pre> <p>So, when I click on my connect button, it is supposed to open the stream to my host and make my 2 objects (inputstream and outputstream)</p> <p>The first step I would like to reach is to have the inputStream in a NSTextView and know if the host has been reached or not... but i'm still stuck :(</p> <p>If someone can light my way, it would be nice! I'm new on Stack Overflow and I'll be glad to help the community on somethings that i know much! :)</p> <hr> <p>I updated my code and it seems that the light is coming, slowly but it's coming :) I made a stream to a telnet server. I got the "hello" in a texview. Now, I would like to send the user &amp; password to be able to send commands to the server, but here is my "send user &amp; pass" button code:</p> <pre><code>- (IBAction)sendusername:(id)sender { NSString * usernameMsg = [NSString stringWithFormat:@"user @", [usernameField stringValue]]; NSData * usertosend = [[NSData alloc] initWithData:[usernameMsg dataUsingEncoding:NSUTF8StringEncoding]]; [outputStream write:[usertosend bytes] maxLength:[usertosend length]]; } </code></pre> <p>Follow my searchs, the server should respond me a thing like "user +ok" but nothing... 2 stranges things: - If I open the socket to a FTP server of SSH server, I've always the "hello" response without problem. But in telnet, 90% of connections respond me a strange hello like this: "ÿýÿýÿûÿû", why?</p> <ul> <li>When I send the user, nothing happen, only an unrocognized event from the handleEvent...</li> </ul>
 

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