On Saturday, 14 April 2018 15:55:20 CEST [email protected] wrote:
> On 11.04.2018 18:09, [email protected] wrote:
> > On 11.04.2018 17:31, Andreas Schneider wrote:
> >> ould appreciate a lot if someone could show me some sample code.
> >> I think that ssh_event_dopoll() will handle it and call the appropriate
> >> callback. Don't use ssh_select()
> >>
> >> In master we have the new connector API which is easier to use, see
> >> https://git.libssh.org/projects/libssh.git/tree/examples/ssh_client.c
> >
> > Thanks, I think that's the issue: The main event polling is not called
> > why my code waits for a connection. But how do I get the event to which
> > are attached the default handlers of libssh?
> >
> > I also looked at the sample code which uses the event API for polling on
> > the channel. But this would not solve my issue with global keep-alive
> > requests. They are sent while no channel exists. IMHO it's an issue with
> > handling messages in the main loop while no channels are open.
>
> Well, maybe I should ask it this way:
>
> How can I keep the internal main loop running, i.e. the default
> callbacks being triggered, when nothing else is going on?
You need to call of of the ssh poll functions, e.g. ssh_channel_poll() or
ssh_event_dopoll() this will also trigger the standard callbacks if something
is in the queue.
> What I needed is some ssh_handleMessages() function which I could call
> in the listening TCP socket select loop.
>
> The only way I found to make it work is by sending some dummy message
> with ssh_send_ignore():
>
> while (1) {
> FD_ZERO(&fds);
> FD_SET(listensock, &fds);
> tv.tv_sec = 5;
> tv.tv_usec = 0;
> sout_len = 0;
>
> rc = select(listensock+1, &fds, NULL, NULL, &tv);
> if (-1 == rc && EINTR == errno)
> continue;
> else if (0 < rc) {
> if (FD_ISSET(listensock, &fds)) {
> forwardsock = accept(listensock, NULL, &sout_len);
> if (forwardsock < 0) {
> perror("accept failed");
> goto shutdown;
> }
> else {
> printf("Local client connected.\n");
> break;
> }
> }
> }
> else if (0 > rc) {
> perror("waiting on listening socket");
> goto shutdown;
> }
> printf("Poll.\n");
> ssh_send_ignore(session, "Say hello");
> }
>
> channel = ssh_channel_new(session);
> ssh_channel_open_forward( ...);
--
Andreas Schneider GPG-ID: CC014E3D
www.cryptomilk.org [email protected]
