179 lines
3.8 KiB
C
179 lines
3.8 KiB
C
/* net_driver_15_4.c - IP 15.4 driver */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <nanokernel.h>
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#include <toolchain.h>
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#include <sections.h>
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#include <string.h>
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#include <errno.h>
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#if defined(CONFIG_STDOUT_CONSOLE)
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#include <stdio.h>
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#define PRINT printf
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#else
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#include <misc/printk.h>
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#define PRINT printk
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#endif
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#include "contiki/ip/uip-debug.h"
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#include <net/net_core.h>
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#include <net/l2_buf.h>
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#include <net/net_ip.h>
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#include <net/net_socket.h>
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#include "contiki/netstack.h"
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#include <net_driver_15_4.h>
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#if !defined(CONFIG_NETWORK_IP_STACK_DEBUG_15_4_NET_DRIVER)
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#undef NET_DBG
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#define NET_DBG(...)
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#endif
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/* Stacks for the tx & rx fibers.
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* FIXME: stack size needs fine-tuning
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*/
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#define STACKSIZE_UNIT 1024
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#ifndef CONFIG_15_4_RX_STACK_SIZE
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#define CONFIG_15_4_RX_STACK_SIZE (STACKSIZE_UNIT * 1)
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#endif
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static char __noinit __stack rx_fiber_stack[CONFIG_15_4_RX_STACK_SIZE];
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/* Queue for incoming packets from hw driver */
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static struct nano_fifo rx_queue;
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static int net_driver_15_4_open(void)
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{
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return 0;
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}
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static int net_driver_15_4_send(struct net_buf *buf)
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{
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#if defined(CONFIG_NETWORK_IP_STACK_DEBUG_15_4_NET_DRIVER)
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int orig_len = ip_buf_len(buf);
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#endif
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if (!NETSTACK_COMPRESS.compress(buf)) {
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NET_DBG("compression failed\n");
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ip_buf_unref(buf);
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return -EINVAL;
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}
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NET_DBG("sending %d bytes (original len %d)\n", ip_buf_len(buf),
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orig_len);
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if (uip_len(buf) == 0) {
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/* It is possible that uIP stack overwrote the len.
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* We need to fix this here.
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*/
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uip_len(buf) = ip_buf_len(buf);
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}
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NET_DBG("Sending (%u bytes) to 15.4 stack\n", ip_buf_len(buf));
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if (!NETSTACK_FRAGMENT.fragment(buf, NULL)) {
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/* Release buffer on error */
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ip_buf_unref(buf);
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}
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return 1;
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}
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static void net_rx_15_4_fiber(void)
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{
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struct net_buf *buf;
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#if NET_MAC_CONF_STATS
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int byte_count;
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#endif
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NET_DBG("Starting 15.4 RX fiber (stack %d bytes)\n",
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sizeof(rx_fiber_stack));
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while (1) {
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/* Wait next packet from 15.4 stack */
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buf = net_buf_get_timeout(&rx_queue, 0, TICKS_UNLIMITED);
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#if NET_MAC_CONF_STATS
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byte_count = uip_pkt_buflen(buf);
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#endif
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if (!NETSTACK_RDC.input(buf)) {
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NET_DBG("802.15.4 RDC input failed, "
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"buf %p discarded\n", buf);
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l2_buf_unref(buf);
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} else {
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#if NET_MAC_CONF_STATS
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net_mac_stats.bytes_received += byte_count;
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#endif
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}
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net_analyze_stack("802.15.4 RX",
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(unsigned char *)rx_fiber_stack,
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sizeof(rx_fiber_stack));
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}
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}
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static void init_rx_queue(void)
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{
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nano_fifo_init(&rx_queue);
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fiber_start(rx_fiber_stack, sizeof(rx_fiber_stack),
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(nano_fiber_entry_t) net_rx_15_4_fiber, 0, 0, 7, 0);
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}
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static struct net_driver net_driver_15_4 = {
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.head_reserve = 0,
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.open = net_driver_15_4_open,
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.send = net_driver_15_4_send,
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};
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int net_driver_15_4_init(void)
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{
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init_rx_queue();
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NETSTACK_RADIO.init();
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NETSTACK_RDC.init();
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NETSTACK_MAC.init();
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NETSTACK_COMPRESS.init();
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net_register_driver(&net_driver_15_4);
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return 0;
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}
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int net_driver_15_4_recv(struct net_buf *buf)
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{
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if (!uip_uncompressed(buf)) {
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if (!NETSTACK_COMPRESS.uncompress(buf)) {
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return -EINVAL;
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}
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}
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if (net_recv(buf) < 0) {
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NET_DBG("input to IP stack failed\n");
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return -EINVAL;
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}
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return 0;
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}
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int net_driver_15_4_recv_from_hw(struct net_buf *buf)
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{
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nano_fifo_put(&rx_queue, buf);
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return 0;
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}
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