[Bluez-users] closing a connection: timing

[Bluez-users] closing a connection: timing

[Marco Trudel]

Hello everybody

this is my "server-code":

int client = accept(sock, (struct sockaddr *)&addr, &alen))
char out[] = "200 100";
send(client, out, strlen(out), 0);
// sleep(2);
close(client);


I wrote a little client with the avetana library on my laptop and i'm able 
to receive the message "200 100".

I tested it with my mobile phone (with exactly the same code as with the 
avetana library). Here I'm unable to receive the data. as soon as i try to 
open the inputstream, an exception ("connection already closed") is thrown.
If I uncommend the sleep, it works an i get "200 100".
I now don't know where the source of the problem could be. Do I miss 
something important? Mobile Phone bug?


btw, I tested it with the bluetooth-terminal from kde and only receive "200 
10". -> where is the last "0"?

kind regards
Marco Trudel


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Re: [Bluez-users] closing a connection: timing

[Marcel Holtmann]

Hi Marco,

> this is my "server-code":
> 
> int client = accept(sock, (struct sockaddr *)&addr, &alen))
> char out[] = "200 100";
> send(client, out, strlen(out), 0);
> // sleep(2);
> close(client);
> 
> 
> I wrote a little client with the avetana library on my laptop and i'm able 
> to receive the message "200 100".
> 
> I tested it with my mobile phone (with exactly the same code as with the 
> avetana library). Here I'm unable to receive the data. as soon as i try to 
> open the inputstream, an exception ("connection already closed") is thrown.
> If I uncommend the sleep, it works an i get "200 100".
> I now don't know where the source of the problem could be. Do I miss 
> something important? Mobile Phone bug?
> 
> 
> btw, I tested it with the bluetooth-terminal from kde and only receive "200 
> 10". -> where is the last "0"?

I have no idea with the Java problem, but if you send only strlen()
bytes then you miss the null byte at the the end. So even for a char
array you should use sizeof(). If this is a text based protocol you
start to run over RFCOMM send add "\r\n" may also be a good idea.

Regards

Marcel




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