xmpp_conn_t object can be reused with saving user's handlers.
However, saving system handlers can lead to a fail during connection
process. This is because old object may contain timed handlers for
missed features or other handlers that would handle incoming stanzas
incorrectly.
Default opening tag doesn't allow to implement XEP-0174. In this case
client needs to send specific attributes. As solution user passes
attributes that are sent inside opening tag. Previous variant of this
function is renamed to xmpp_conn_open_stream_default().
The way to pass attributes is not the best one, but it's used to conform
existent interface of xmpp_stanza_get_attributes().
Remove "raw" suffix from functions that work with a raw connection.
This function is similar to xmpp_connect_client(), but doesn't perform
authentication. Instead, it calls user's connection handler immediately
after establishing the connection. Hence, user can implement own
authendication or registration procedures.
Such a "raw" connection can be useful when user interaction is required
(e.g. Data Forms in XEP-0077, OAuth2).
Store keepalive parameters in conn object. This allows call the function
with a disconnected conn. Also, the parameters are not cleared on
reconnect and applied once a socket is created.
If `id == NULL' there were two issues: use-after-free error or
logging wrong error description.
Also open stream handler was called even when error occured and
conn object was disconnected.
Disconnected xmpp_conn_t object can be connected again. The object
is reset before connection, but the next fields remain untoucned:
* all handlers
* flags
* jid and password
Main use-case of this change is reconnect when an error occurs.
xmpp_conn_set_flags() and xmpp_conn_get_flags() unify interface of
connection configuration.
This interface allows compile-time check of supported features or even
run-time check. Therefore, applications can be built with older
libstrophe which doesn't support some optional flags.
* Clear conn->secured and conn->tls_failed. These values could be
saved after re-connect.
* conn is not secured if conn->tls is NULL. This condition handles
disconnected connections.
