Hi Andreas,
Thanks for your answer! Please find my comments and further below.
On 4/13/22 07:30, Andreas Schneider wrote:
The ssh session is marked as connected after a successful key exchange.
Okay, that explains a lot of things, however, I still don't know why I
get 'Socket error: disconnected' message. This suggests that even the
socket is not connected.
Currently it is a connection from a client, but we don't know if it is a SSH
client yet. ssh_handle_key_exchange(session) is needed first to check if we
talk to a SSH client. But you should setup callbacks before you call
ssh_handle_key_exchange()
Yes, this is the failing call. I add the callbacks as follows:
struct ssh_channel_callbacks_struct channel_cb = {
.userdata = &cdata,
.channel_pty_request_function = cli_pty_request,
// .channel_pty_window_change_function = pty_resize,
.channel_shell_request_function = cli_shell_request,
// .channel_exec_request_function = exec_request,
// .channel_data_function = data_function,
// .channel_subsystem_request_function = subsystem_request
};
struct ssh_server_callbacks_struct server_cb = {
.userdata = &sdata,
.auth_password_function = cli_auth_password,
.channel_open_request_session_function = cli_channel_open
};
ssh_set_auth_methods(session, SSH_AUTH_METHOD_PASSWORD); /*we could
support for key type authentication, but password is enough for now.*/
ssh_callbacks_init(&server_cb);
ssh_callbacks_init(&channel_cb);
ret = ssh_set_server_callbacks(session, &server_cb);
if (ret != SSH_OK) {
debug(hm->dbg, DEBUG_ERR, "%s(): CLI: Error setting server
callbacks.\n", __func__);
ret_val = ERR;
goto exit_point;
}
I don't know for sure if it is okay to have just the un-commented callbacks.
Patches to improve the documentation are welcome!:-)
I can contribute. Can you tell me which repository contains the
documents, and how to submit PRs?
Did you look at examples/ssh_server.c? This is a simple ssh server
implementation. We recommend to implement a pre-forking server for security
reasons.
Yes, I'm following that example code.
BR,
Levente
--
Levente Kovacs
Senior Electronic Engineer
W: http://levente.logonex.eu
