Subject: Re: [Bluez-users] rfcomm question 3
From: Marcel Holtmann <marcel@holtmann.org>
To: BlueZ Mailing List <bluez-users@lists.sourceforge.net>
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Date: Wed, 02 Feb 2005 04:10:21 +0100

Hi Michael,

>     I've found one powerpoint you made about Bluetooth programming on
> Linux in Wireless Technologies Congress 2003. But I don't know for
> those three programs you put, which one is describing about the PC
> listening the mobile in RFCOMM channel. Let me put here.
> For Handling of Bluetooth device addresses
> #include <bluetooth/bluetooth.h>
> void main(int argc, char *argv[])
> {
> bdaddr_t bdaddr;
> char *str, addr[18];
> str2ba("00:a5:b4:c3:d2:e1", &bdaddr);
> ba2str(&bdaddr, addr);
> str = batostr(&bdaddr);
> printf("%s %s\n", addr, str);
> free(str);
> bacpy(&bdaddr, BDADDR_ANY);
> }
> 
> For definition of the socket data types
> static int rfcomm_connect(bdaddr_t *src, bdaddr_t *dst, uint8_t
> channel)
> {
> struct sockaddr_rc addr;
> int sk;
> if ((sk = socket(PF_BLUETOOTH, SOCK_STREAM, BTPROTO_RFCOMM)) < 0)
> return -1;
> addr.rc_family = AF_BLUETOOTH;
> bacpy(&addr.rc_bdaddr, src);
> addr.rc_channel = 0;
> if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
> close(sk);
> return -1;
> }
> addr.rc_family = AF_BLUETOOTH;
> bacpy(&addr.rc_bdaddr, dst);
> addr.rc_channel = channel;
> if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
> close(sk);
> return -1;
> }
> So I wish to know which one is about socket based programming?

the second is about socket programming, because it has the command
socket() in it ;)

The rctest.c program is a prefect example on how to create a listening
RFCOMM server and parts of the rfcomm program may also help. If you
don't how to do socket programming, then buy a book about it or read
some of the howtos on the net about TCP/IP socket progamming. Actually
using the sockets in Bluetooth is a lot more easier.

Regards

Marcel


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