bool event_handler_pdu_send_timeout_check(node_t *node, node_t *outgoing_node, mac_pdu_t *pdu)
{
if (node->mac_info->error) { /* the message wasn't received */
rs_debug(DEBUG_MAC, "node '%s': a frame wasn't correctly received, destroying it", node->phy_info->name);
pdu->sdu = NULL;
mac_pdu_destroy(pdu);
}
node->mac_info->busy = FALSE;
return TRUE;
}
bool event_handler_pdu_send(node_t *node, node_t *outgoing_node, mac_pdu_t *pdu)
{
if (node->mac_info->busy) {
rs_debug(DEBUG_MAC, "node '%s': MAC layer is busy, dropping frame", node->phy_info->name);
return FALSE;
}
if (!phy_node_send(node, outgoing_node, pdu)) {
return FALSE;
}
rs_system_schedule_event(node, mac_event_pdu_send_timeout_check, outgoing_node, pdu, rs_system->mac_pdu_timeout);
node->mac_info->error = TRUE;
node->mac_info->busy = TRUE;
return TRUE;
}
int
rs_packet_send (struct rs_packet *pkt, void *user_data)
{
struct rs_connection *conn = NULL;
int err = 0;
assert (pkt);
assert (pkt->conn);
conn = pkt->conn;
if (_conn_is_open_p (conn))
packet_do_send (pkt);
else
if (_conn_open (conn, pkt))
return -1;
assert (conn->evb);
assert (conn->active_peer);
assert (conn->fd >= 0);
conn->user_data = user_data;
if (conn->bev) /* TCP */
{
bufferevent_setcb (conn->bev, NULL, tcp_write_cb, tcp_event_cb, pkt);
bufferevent_enable (conn->bev, EV_WRITE);
}
else /* UDP */
{
event_assign (conn->wev, conn->evb, event_get_fd (conn->wev),
EV_WRITE, event_get_callback (conn->wev), pkt);
err = event_add (conn->wev, NULL);
if (err < 0)
return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
"event_add: %s",
evutil_gai_strerror (err));
}
/* Do dispatch, unless the user wants to do it herself. */
if (!conn_user_dispatch_p (conn))
{
conn->callbacks.sent_cb = _wcb;
conn->user_data = pkt;
rs_debug (("%s: entering event loop\n", __func__));
err = event_base_dispatch (conn->evb);
if (err < 0)
return rs_err_conn_push_fl (conn, RSE_EVENT, __FILE__, __LINE__,
"event_base_dispatch: %s",
evutil_gai_strerror (err));
rs_debug (("%s: event loop done\n", __func__));
conn->callbacks.sent_cb = NULL;
conn->user_data = NULL;
if ((pkt->flags & RS_PACKET_SENT) == 0)
{
assert (rs_err_conn_peek_code (conn));
return rs_err_conn_peek_code (conn);
}
}
return RSE_OK;
}
