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List Info
Thread: BlueZ, testing socket
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| BlueZ, testing socket |
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2007-03-31 08:24:43 |
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Hi all,
This code below connects to the server socket and selects
the protocol to be used (L2CAP), opens the socket for that protocol,
creates a bluetooth address object and sets its port to the PSM and
binds the socket to this address, tells the sockets to listen for
incoming connections, creates a blank socket and pass it to the
listening socket through accept (When this call completes the socket
passed in a parameter is now fully connected and can be used to send
and receive data)
QUESTION: How do I test this socket works? I want to send a messge like "Hello World";. Please help...anyone
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <malloc.h>
#include <syslog.h>
#include <signal.h
>
#include <getopt.h>
#include <sys/poll.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/input.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
#include <bluetooth/l2cap.h>
#include <bluetooth/sdp.h>
#include <bluetooth/hidp.h>
/*
* l2cap_listen(l2cap_channel)
*
* Searches all sockets listening to the L2CAP protocol,
* Checks for a socket waiting for an incoming connection
* request.
* Ensures that there is not already a connection
* with the source address of the requesting Bluetooth device.
*
;* Use this channel as a listening post. This will
* result in calls to:
*
* proto->newconn(upper, laddr, raddr)
*
* for incoming connections matching the psm and local
* address of the channel
*
;* The upper layer should create and return a new channel.
*
* ; This channel cannot be used for anything else subsequent to this call
;*/
static int l2cap_listen(const bdaddr_t *bdaddr, unsigned short psm, int lm, int backlog)
{
struct sockaddr_l2 addr;
struct l2cap_options opts;
int sk;
;
// create socket
if ((sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0)
return -1;
; /* open connection to remote device */
; memset(&addr, 0, sizeof(addr));
; addr.l2_family = AF_BLUETOOTH;
bacpy(&;addr.l2_bdaddr, bdaddr); /* update source address of socket */
addr.l2_psm = htobs(psm);
// associate local address with socket
if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("ERROR: Could not bind socket");
; close(sk);
return -1;
; }
setsockopt(sk, SOL_L2CAP, L2CAP_LM, &lm, sizeof(lm));
; memset(&opts, 0, sizeof(opts));
; opts.imtu = HIDP_DEFAULT_MTU;
opts.omtu = HIDP_DEFAULT_MTU;
opts.flush_to = 0xffff;
setsockopt(sk, SOL_L2CAP, L2CAP_OPTIONS, &opts, sizeof(opts));
if (listen(sk, backlog) < 0) {
close(sk);
return -1;
; }
return sk;
}
/*
* l2cap_connect_req()
* Establishes connection with specific socket
* Request to establish connection from remote
* communication partner.
* Such a socket has to have been previously created
* by an application with the command listen.
*/
static int l2cap_connect(bdaddr_t *src, bdaddr_t *dst, unsigned short psm)
{
struct sockaddr_l2 addr;
struct l2cap_options opts;
int sk;
; // socket allocation
if ((sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP)) < 0)
perror("ERROR: Could not create socket");
return -1;
; memset(&addr, 0, sizeof(addr));
; addr.l2_family = AF_BLUETOOTH;
bacpy(&;addr.l2_bdaddr, src); /*update source address of socket */
; if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
; close(sk);
return -1;
; }
memset(&am | |