| /* |
| * Copyright (c) 2007, Swedish Institute of Computer Science. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the Institute nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * This file is part of the Contiki operating system. |
| * |
| */ |
| |
| /** |
| * \file |
| * MAC driver header file |
| * \author |
| * Adam Dunkels <adam@sics.se> |
| */ |
| |
| #ifndef MAC_H_ |
| #define MAC_H_ |
| |
| #include <stdbool.h> |
| #include "contiki-conf.h" |
| #include "dev/radio.h" |
| |
| #include <net/buf.h> |
| |
| #if NET_MAC_CONF_STATS |
| /* Statistics for sent bytes. */ |
| typedef struct net_mac_stats { |
| uint32_t bytes_sent; |
| uint32_t bytes_received; |
| } net_mac_stats_t; |
| extern net_mac_stats_t net_mac_stats; |
| #endif |
| |
| typedef void (* mac_callback_t)(struct net_buf *buf, void *ptr, int status, int transmissions); |
| |
| void mac_call_sent_callback(struct net_buf *buf, mac_callback_t sent, void *ptr, int status, int num_tx); |
| |
| /** |
| * The structure of a MAC protocol driver in Contiki. |
| */ |
| struct mac_driver { |
| char *name; |
| |
| /** Initialize the MAC driver */ |
| void (* init)(void); |
| |
| /** Send a packet from the Rime buffer */ |
| uint8_t (* send)(struct net_buf *buf, mac_callback_t sent_callback, |
| bool last_fragment, void *ptr); |
| |
| /** Callback for getting notified of incoming packet. */ |
| uint8_t (* input)(struct net_buf *buf); |
| |
| /** Turn the MAC layer on. */ |
| int (* on)(void); |
| |
| /** Turn the MAC layer off. */ |
| int (* off)(int keep_radio_on); |
| |
| /** Returns the channel check interval, expressed in clock_time_t ticks. */ |
| unsigned short (* channel_check_interval)(void); |
| }; |
| |
| /* Generic MAC return values. */ |
| enum { |
| /**< The MAC layer transmission was OK. */ |
| MAC_TX_OK, |
| |
| /**< The MAC layer transmission could not be performed due to a |
| collision. */ |
| MAC_TX_COLLISION, |
| |
| /**< The MAC layer did not get an acknowledgment for the packet. */ |
| MAC_TX_NOACK, |
| |
| /**< The MAC layer deferred the transmission for a later time. */ |
| MAC_TX_DEFERRED, |
| |
| /**< The MAC layer transmission could not be performed because of an |
| error. The upper layer may try again later. */ |
| MAC_TX_ERR, |
| |
| /**< The MAC layer transmission could not be performed because of a |
| fatal error. The upper layer does not need to try again, as the |
| error will be fatal then as well. */ |
| MAC_TX_ERR_FATAL, |
| }; |
| |
| #endif /* MAC_H_ */ |