static int _handle_proceedtls_default(xmpp_conn_t * const conn,
xmpp_stanza_t * const stanza,
void * const userdata)
{
char *name;
name = xmpp_stanza_get_name(stanza);
xmpp_debug(conn->ctx, "xmpp",
"handle proceedtls called for %s", name);
if (strcmp(name, "proceed") == 0) {
xmpp_debug(conn->ctx, "xmpp", "proceeding with TLS");
conn->tls = tls_new(conn->ctx, conn->sock);
if (!tls_start(conn->tls))
{
xmpp_debug(conn->ctx, "xmpp", "Couldn't start TLS! error %d", tls_error(conn->tls));
tls_free(conn->tls);
conn->tls = NULL;
conn->tls_failed = 1;
/* failed tls spoils the connection, so disconnect */
xmpp_disconnect(conn);
}
else
{
conn->secured = 1;
conn_prepare_reset(conn, auth_handle_open);
conn_open_stream(conn);
}
}
return 0;
}
int conn_tls_start(xmpp_conn_t * const conn)
{
int rc;
if (conn->tls_disabled) {
conn->tls = NULL;
rc = -ENOSYS;
} else {
conn->tls = tls_new(conn->ctx, conn->sock);
rc = conn->tls == NULL ? -ENOMEM : 0;
}
if (conn->tls != NULL) {
if (tls_start(conn->tls)) {
conn->secured = 1;
conn_prepare_reset(conn, auth_handle_open);
} else {
rc = tls_error(conn->tls);
conn->error = rc;
tls_free(conn->tls);
conn->tls = NULL;
conn->tls_failed = 1;
}
}
if (rc != 0)
xmpp_debug(conn->ctx, "conn", "Couldn't start TLS! error %d", rc);
return rc;
}
static int _handle_sasl_result(xmpp_conn_t * const conn,
xmpp_stanza_t * const stanza,
void * const userdata)
{
char *name;
name = xmpp_stanza_get_name(stanza);
/* the server should send a <success> or <failure> stanza */
if (strcmp(name, "failure") == 0) {
xmpp_debug(conn->ctx, "xmpp", "SASL %s auth failed",
(char *)userdata);
/* fall back to next auth method */
_auth(conn);
} else if (strcmp(name, "success") == 0) {
/* SASL PLAIN auth successful, we need to restart the stream */
xmpp_debug(conn->ctx, "xmpp", "SASL %s auth successful",
(char *)userdata);
/* reset parser */
conn_prepare_reset(conn, _handle_open_sasl);
/* send stream tag */
conn_open_stream(conn);
} else {
/* got unexpected reply */
xmpp_error(conn->ctx, "xmpp", "Got unexpected reply to SASL %s"\
"authentication.", (char *)userdata);
xmpp_disconnect(conn);
}
return 0;
}
/** Send the default opening stream tag.
* The default tag is the one sent by xmpp_connect_client().
* User's connection handler is called with event XMPP_CONN_CONNECT when
* server replies with its opening tag.
*
* @return XMPP_EOK (0) on success a number less than 0 on failure
*
* @note The connection must be connected with xmpp_connect_raw().
*
* @ingroup Connections
*/
int xmpp_conn_open_stream_default(xmpp_conn_t * const conn)
{
if (!conn->is_raw)
return XMPP_EINVOP;
conn_prepare_reset(conn, auth_handle_open_raw);
conn_open_stream(conn);
return XMPP_EOK;
}
/** Initiate a component connection to server.
* This function returns immediately after starting the connection
* process to the XMPP server, and notifiations of connection state changes
* will be sent to the internal callback function that will set up handler
* for the component handshake as defined in XEP-0114.
* The domain and port to connect to must be provided in this case as the JID
* provided to the call serves as component identifier to the server and is
* not subject to DNS resolution.
*
* @param conn a Strophe connection object
* @param server a string with domain to use directly as the domain can't be
* extracted from the component name/JID. If this is not set, the call
* will fail.
* @param port an integer port number to use to connect to server expecting
* an external component. If this is 0, the port 5347 will be assumed.
* @param callback a xmpp_conn_handler callback function that will receive
* notifications of connection status
* @param userdata an opaque data pointer that will be passed to the callback
*
* @return 0 on success and -1 on an error
*
* @ingroup Connections
*/
int xmpp_connect_component(xmpp_conn_t * const conn, const char * const server,
unsigned short port, xmpp_conn_handler callback,
void * const userdata)
{
int connectport;
if (conn->state != XMPP_STATE_DISCONNECTED)
return -1;
if (conn->domain != NULL)
xmpp_free(conn->ctx, conn->domain);
conn->type = XMPP_COMPONENT;
conn->secured = 0;
conn->tls_failed = 0;
/* JID serves as an identificator here and will be used as "to" attribute
of the stream */
conn->domain = xmpp_strdup(conn->ctx, conn->jid);
/* The server domain, jid and password MUST be specified. */
if (!(server && conn->jid && conn->pass)) return -1;
connectport = port ? port : _conn_default_port(conn);
xmpp_debug(conn->ctx, "xmpp", "Connecting via %s", server);
conn->sock = sock_connect(server, connectport);
xmpp_debug(conn->ctx, "xmpp", "sock_connect to %s:%d returned %d",
server, connectport, conn->sock);
if (conn->sock == -1) return -1;
/* XEP-0114 does not support TLS */
conn->tls_disabled = 1;
/* setup handler */
conn->conn_handler = callback;
conn->userdata = userdata;
conn_prepare_reset(conn, auth_handle_component_open);
/* FIXME: it could happen that the connect returns immediately as
* successful, though this is pretty unlikely. This would be a little
* hard to fix, since we'd have to detect and fire off the callback
* from within the event loop */
conn->state = XMPP_STATE_CONNECTING;
conn->timeout_stamp = time_stamp();
xmpp_debug(conn->ctx, "xmpp", "attempting to connect to %s", server);
return 0;
}
static int _conn_connect(xmpp_conn_t * const conn,
const char * const domain,
const char * const host,
unsigned short port,
xmpp_conn_type_t type,
xmpp_conn_handler callback,
void * const userdata)
{
xmpp_open_handler open_handler;
if (conn->state != XMPP_STATE_DISCONNECTED) return XMPP_EINVOP;
if (type != XMPP_CLIENT && type != XMPP_COMPONENT) return XMPP_EINVOP;
if (host == NULL || port == 0) return XMPP_EINT;
_conn_reset(conn);
conn->type = type;
conn->domain = xmpp_strdup(conn->ctx, domain);
if (!conn->domain) return XMPP_EMEM;
conn->sock = sock_connect(host, port);
xmpp_debug(conn->ctx, "xmpp", "sock_connect() to %s:%u returned %d",
host, port, conn->sock);
if (conn->sock == -1) return XMPP_EINT;
if (conn->ka_timeout || conn->ka_interval)
sock_set_keepalive(conn->sock, conn->ka_timeout, conn->ka_interval);
/* setup handler */
conn->conn_handler = callback;
conn->userdata = userdata;
open_handler = conn->is_raw ? auth_handle_open_stub :
type == XMPP_CLIENT ? auth_handle_open :
auth_handle_component_open;
conn_prepare_reset(conn, open_handler);
/* FIXME: it could happen that the connect returns immediately as
* successful, though this is pretty unlikely. This would be a little
* hard to fix, since we'd have to detect and fire off the callback
* from within the event loop */
conn->state = XMPP_STATE_CONNECTING;
conn->timeout_stamp = time_stamp();
xmpp_debug(conn->ctx, "xmpp", "Attempting to connect to %s", host);
return 0;
}
/** Send an opening stream tag.
* User's connection handler is called with event XMPP_CONN_CONNECT when
* server replies with its opening tag.
*
* @param conn a Strophe connection object
* @param attributes Array of strings in format: even index points to
* an attribute name and odd index points to its value
* @param attributes_len Number of elements in the attributes array, it
* should be number of attributes multiplied by 2
*
* @return XMPP_EOK (0) on success a number less than 0 on failure
*
* @note The connection must be connected with xmpp_connect_raw().
*
* @ingroup Connections
*/
int xmpp_conn_open_stream(xmpp_conn_t * const conn, char **attributes,
size_t attributes_len)
{
char *tag;
if (!conn->is_raw)
return XMPP_EINVOP;
tag = _conn_build_stream_tag(conn, attributes, attributes_len);
if (!tag)
return XMPP_EMEM;
conn_prepare_reset(conn, auth_handle_open_raw);
xmpp_send_raw_string(conn, "<?xml version=\"1.0\"?>%s", tag);
xmpp_free(conn->ctx, tag);
return XMPP_EOK;
}
static int _handle_proceedtls_default(xmpp_conn_t * const conn,
xmpp_stanza_t * const stanza,
void * const userdata)
{
const char *name;
name = xmpp_stanza_get_name(stanza);
xmpp_debug(conn->ctx, "xmpp", "handle proceedtls called for %s", name);
if (strcmp(name, "proceed") == 0) {
xmpp_debug(conn->ctx, "xmpp", "proceeding with TLS");
if (conn_tls_start(conn) == 0) {
conn_prepare_reset(conn, auth_handle_open);
conn_open_stream(conn);
} else {
/* failed tls spoils the connection, so disconnect */
xmpp_disconnect(conn);
}
}
return 0;
}
/** Create a new Strophe connection object.
*
* @param ctx a Strophe context object
*
* @return a Strophe connection object or NULL on an error
*
* @ingroup Connections
*/
xmpp_conn_t *xmpp_conn_new(xmpp_ctx_t * const ctx)
{
xmpp_conn_t *conn = NULL;
xmpp_connlist_t *tail, *item;
if (ctx == NULL) return NULL;
conn = xmpp_alloc(ctx, sizeof(xmpp_conn_t));
if (conn != NULL) {
conn->ctx = ctx;
conn->type = XMPP_UNKNOWN;
conn->state = XMPP_STATE_DISCONNECTED;
conn->sock = -1;
conn->tls = NULL;
conn->timeout_stamp = 0;
conn->error = 0;
conn->stream_error = NULL;
/* default send parameters */
conn->blocking_send = 0;
conn->send_queue_max = DEFAULT_SEND_QUEUE_MAX;
conn->send_queue_len = 0;
conn->send_queue_head = NULL;
conn->send_queue_tail = NULL;
/* default timeouts */
conn->connect_timeout = CONNECT_TIMEOUT;
conn->lang = xmpp_strdup(conn->ctx, "en");
if (!conn->lang) {
xmpp_free(conn->ctx, conn);
return NULL;
}
conn->domain = NULL;
conn->jid = NULL;
conn->pass = NULL;
conn->stream_id = NULL;
conn->bound_jid = NULL;
conn->tls_support = 0;
conn->tls_disabled = 0;
conn->tls_failed = 0;
conn->sasl_support = 0;
conn->secured = 0;
conn->bind_required = 0;
conn->session_required = 0;
conn->parser = parser_new(conn->ctx,
_handle_stream_start,
_handle_stream_end,
_handle_stream_stanza,
conn);
conn->reset_parser = 0;
conn_prepare_reset(conn, auth_handle_open);
conn->authenticated = 0;
conn->conn_handler = NULL;
conn->userdata = NULL;
conn->timed_handlers = NULL;
/* we own (and will free) the hash values */
conn->id_handlers = hash_new(conn->ctx, 32, NULL);
conn->handlers = NULL;
/* give the caller a reference to connection */
conn->ref = 1;
/* add connection to ctx->connlist */
tail = conn->ctx->connlist;
while (tail && tail->next) tail = tail->next;
item = xmpp_alloc(conn->ctx, sizeof(xmpp_connlist_t));
if (!item) {
xmpp_error(conn->ctx, "xmpp", "failed to allocate memory");
xmpp_free(conn->ctx, conn->lang);
parser_free(conn->parser);
xmpp_free(conn->ctx, conn);
conn = NULL;
} else {
item->conn = conn;
item->next = NULL;
if (tail) tail->next = item;
else conn->ctx->connlist = item;
}
}
return conn;
}
/** Create a new Strophe connection object.
*
* @param ctx a Strophe context object
*
* @return a Strophe connection object or NULL on an error
*
* @ingroup Connections
*/
xmpp_conn_t *xmpp_conn_new(xmpp_ctx_t * const ctx)
{
xmpp_conn_t *conn;
list_t *item;
if (!ctx)
return NULL;
conn = xmpp_alloc(ctx, sizeof(xmpp_conn_t));
if (!conn)
return NULL;
conn->ctx = ctx;
conn->type = XMPP_UNKNOWN;
conn->state = XMPP_STATE_DISCONNECTED;
conn->sock = -1;
conn->tls = NULL;
conn->timeout_stamp = 0;
conn->error = 0;
conn->stream_error = NULL;
/* default send parameters */
conn->blocking_send = 0;
conn->send_queue_max = DEFAULT_SEND_QUEUE_MAX;
conn->send_queue = list_init(ctx);
if (!conn->send_queue)
goto out_free_conn;
/* default timeouts */
conn->connect_timeout = CONNECT_TIMEOUT;
conn->lang = xmpp_strdup(ctx, "en");
if (!conn->lang)
goto out_free_send_queue;
conn->domain = NULL;
conn->jid = NULL;
conn->pass = NULL;
conn->stream_id = NULL;
conn->bound_jid = NULL;
conn->tls_support = 0;
conn->tls_disabled = 0;
conn->tls_failed = 0;
conn->sasl_support = 0;
conn->secured = 0;
conn->bind_required = 0;
conn->session_required = 0;
conn->parser = parser_new(ctx,
_handle_stream_start,
_handle_stream_end,
_handle_stream_stanza,
conn);
if (!conn->parser)
goto out_free_lang;
conn->reset_parser = 0;
conn_prepare_reset(conn, auth_handle_open);
conn->authenticated = 0;
conn->conn_handler = NULL;
conn->userdata = NULL;
/* we own (and will free) the hash values */
conn->id_handlers = hash_new(ctx, 32, NULL);
conn->timed_handlers = list_init(ctx);
if (!conn->timed_handlers)
goto out_free_parser;
conn->handlers = list_init(ctx);
if (!conn->handlers)
goto out_free_timed_handlers;
/* give the caller a reference to connection */
conn->ref = 1;
/* add connection to ctx->connlist */
item = list_init_item(ctx);
if (!item)
goto out_free_handlers;
else {
item->data = (void *)conn;
list_push(ctx->connlist, item);
}
return conn;
out_free_handlers:
list_destroy(conn->handlers);
out_free_timed_handlers:
list_destroy(conn->timed_handlers);
out_free_parser:
parser_free(conn->parser);
out_free_lang:
xmpp_free(ctx, conn->lang);
out_free_send_queue:
list_destroy(conn->send_queue);
out_free_conn:
xmpp_free(ctx, conn);
return NULL;
}
