l2cap-client.c

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/l2cap.h>

int main(int argc, char **argv) {
	
	struct sockaddr_12 addr = { 0 };
	int s, status;
	char dest[18] = "";
	
	if (argc < 2) {
		fprintf(stderr, "usage: %s <bt_addr>\n", argv[0]);
		return 1;
	}
	
	strncpy(dest, argv[1], 18);
	
	// allocate a socket
	s = socket(AF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
	
	// set the connection parameters (who to connect to)
	addr.l2_family = AF_BLUETOOTH;
	addr.l2_psm = htobs(0x1001);
	str2ba(dest, &addr.l2_bdaddr);
	
	// connect to server
	status = connect(s, (struct sockaddr *)&addr, sizeof(addr));
	
	// send a message
	if (status == 0) {
		status = send(s, "hello!", 6, 0);
	}
	
	if (status < 0) perror("uh oh");
	
	// close connection
	close(s);
	return 0;
	
}