2005-12-06 05:02:55

by Swathi Mathur80

Subject: [Bluez-users] Cannot send messages to my bluetooth enabled Phone using RFCOMM

Hello,
I am trying to send some data to my bluetooth enabled
Sony Ericsson
handphone T630 from my PC which has the bluez stack
running on it, i am using the RFCOMM.

I get the error message "Cant create socket" and "bad
file descriptor"

Can someone help me in finding the mistake and in
correcting the below code

------------------------------------------------------------------
#include <stdio.h>
#include <string.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/rfcomm.h>

int main(int argc, char **argv)
{
struct sockaddr_rc addr = { 0 };
int s, status;
char dest[18] = "00:0A:D9:4C:EB:9A"; // BD of my
sony erricson phone

//allocate a socket
s =
socket(AF_BLUETOOTH,SOCK_SEQPACKET,BTPROTO_RFCOMM);

if (s < 0) {
printf("Cant create socket:\n");
}


//set the connection parameters(who to connect to)
addr.rc_family = AF_BLUETOOTH;
addr.rc_channel = (uint8_t) 1;
str2ba(dest,&addr.rc_bdaddr);

//connect to server
status = connect(s, (struct sockaddr
*)&addr,sizeof(addr));

//send a message
if(status == 0)
{
status = write(s,"hello!",6);
}

if(status<0) perror("uh oh");
close(s);
return 0;

}

------------------------------------------------------------------------





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2005-12-07 09:07:37

by Marcel Holtmann

Subject: Re: [Bluez-users] Cannot send messages to my bluetooth enabled Phone using RFCOMM

Hi Swathi,

> I am trying to send some data to my bluetooth enabled
> Sony Ericsson
> handphone T630 from my PC which has the bluez stack
> running on it, i am using the RFCOMM.
>
> I get the error message "Cant create socket" and "bad
> file descriptor"
>
> Can someone help me in finding the mistake and in
> correcting the below code
>
> ------------------------------------------------------------------
> #include <stdio.h>
> #include <string.h>
> #include <sys/socket.h>
> #include <bluetooth/bluetooth.h>
> #include <bluetooth/rfcomm.h>
>
> int main(int argc, char **argv)
> {
> struct sockaddr_rc addr = { 0 };
> int s, status;
> char dest[18] = "00:0A:D9:4C:EB:9A"; // BD of my
> sony erricson phone
>
> //allocate a socket
> s =
> socket(AF_BLUETOOTH,SOCK_SEQPACKET,BTPROTO_RFCOMM);
>
> if (s < 0) {
> printf("Cant create socket:\n");
> }

the RFCOMM protocol is a SOCK_STREAM.

Regards

Marcel




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