Hi Ben,
I can't speak to any C++ issues, but you might check if this is not just a
permissions or network/firewall issue by:
>From the BaseX GUI on your laptop, execute:
client:connect('test-pc', 1984, 'admin', '...') (:will return id if
can connect else error :)
Or from a laptop terminal window
basexclient -n test-pc -p1984
Happy retirement.
/Andy
On Mon, 26 Jan 2026 at 16:37, Ben Engbers via BaseX-Talk <
[email protected]> wrote:
> Hi,
>
> Thanks to an increasing number of grandchildren, as a retiree I have had
> little time in recent years to continue working on my C++ client for
> Basex. It therefore took a lot of time to find and fix a very persistent
> memory leak, but I finally succeeded.
> On a local machine, running basexserver, the entire server protocol can
> be handled without error messages. The only thing I couldn't test yet
> was the use of a websocket to a remote machine, and that now appears to
> be causing problems.
> On an old PC, I installed a minimal version of Fedora 43 that does not
> use GNOME. Basexserver runs without any problems and I can create new
> users in basexclient. Local use of my client does not cause any
> problems. But when I want to create a websocket to the test machine, I
> get the error message “setsockopt: Bad file descriptor”. After several
> attempts using the IP address instead of the machine name, both my
> laptop and the test PC crashed, and I had to reinstall basex.
> In C++, I use the following code to create a socket (the starting point
> for this code was Alexander Holupirek's C code “basexdbc.c”):
>
> BasexSocket & BasexSocket::CreateSocket (string host, string port) { //
> @suppress("Name convention for function")
> cout << __FUNCTION__ << " : " << host << " | " << port << " | "
> << endl;
> if (host.empty () || port.empty ()) {
> cout << "ERROR: Invalid hostname/port\n" << endl;
> exit(0);
> }
> /*
> if (host.empty () || port.empty ()) {
> Master_sfd = -1;
> return *this;
> }
> */
>
> struct addrinfo hints;
> struct addrinfo * result = NULL, *rp;
> memset (&hints, 0, sizeof (struct addrinfo)); // Initialize hints
> hints.ai_family = AF_INET; // Accept both AF_INET and
> AF_INET6
> hints.ai_socktype = SOCK_STREAM;
> hints.ai_flags = AI_NUMERICSERV; // Port must be specified as number
>
> int rc;
> rc = getaddrinfo (host.c_str (), port.c_str (), &hints, &result);
> if (rc != 0)
> perror (gai_strerror (rc));
>
> for (rp = result; rp != NULL; rp = rp->ai_next) { // result is a
> linked
> list of address structures.
> Master_sfd = socket (rp->ai_family, rp->ai_socktype, rp->ai_protocol);
> if (Master_sfd == -1)
> continue;
> if (connect (Master_sfd, rp->ai_addr, rp->ai_addrlen) != -1)
> break;
> // Try to connect. Return the first successfull connect
> or abort
> close (Master_sfd);
> }
> set_nonblock_flag (Master_sfd, 1);
> int opt = true;
> if (setsockopt
> (Master_sfd, SOL_SOCKET, SO_REUSEADDR, (char *) &opt, sizeof (opt)) < 0)
> {
> perror ("setsockopt");
> exit (EXIT_FAILURE);
> }
> if (rp == NULL) {
> warnx ("Can not connect to Basex server");
> }
> freeaddrinfo (result);
> cout << "Master_sfd: " << Master_sfd << endl;
> return *this;
> };
>
> Can anyone explain to me how I can successfully build a websocket to the
> test PC?
>
> Ben
>
>
