mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-28 13:05:21 +00:00
20aa77ce6f
When sending data to network, make sure to check the return
code from network driver. The driver should return these codes:
0 : If packet could not be sent. In this case buf should
not be released.
1 : If the packet was sent successfully. In this case the buf
should be released by either the send() or some other
lower layer function.
<0: If there is an error, the buf should not be released by
send() function.
Fixed the relevant part in Contiki code so that the tcpip_output()
return correct value
0 = packet was not sent, caller needs to free it
1 = packet was sent, network driver will free the net_buf
after sending it to medium
Change-Id: I4380d7747985fc057f5ef73ca97b76f6e9888a55
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/* net_driver_loopback.c - Loopback driver */
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/*
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* Copyright (c) 2015 Intel Corporation
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <nanokernel.h>
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#include <toolchain.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/net_buf.h>
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#include <net/net_ip.h>
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#include <net/net_socket.h>
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/* The following uIP includes are for testing purposes only. Never
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* ever use them in your application.
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*/
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#include "contiki/ipv6/uip-ds6-route.h" /* to set the route */
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#include "contiki/ipv6/uip-ds6-nbr.h" /* to set the neighbor cache */
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static int net_driver_loopback_open(void)
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{
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const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
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uint8_t eui64[] = { };
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net_set_mac(eui64, sizeof(eui64));
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if (!uip_ds6_addr_add((uip_ipaddr_t *)&in6addr_loopback, 0,
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ADDR_MANUAL))
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return -EINVAL;
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if (!uip_ds6_nbr_add((uip_ipaddr_t *)&in6addr_loopback,
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&uip_lladdr, 0, NBR_REACHABLE)) {
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NET_DBG("Cannot add neighbor cache\n");
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return -EINVAL;
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}
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if (!uip_ds6_route_add((uip_ipaddr_t *)&in6addr_loopback, 128,
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(uip_ipaddr_t *)&in6addr_loopback)) {
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NET_DBG("Cannot add localhost route\n");
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return -EINVAL;
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}
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NET_DBG("initialized loopback driver\n");
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return 0;
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}
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static int net_driver_loopback_send(struct net_buf *buf)
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{
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NET_DBG("received %d bytes\n", buf->len);
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net_recv(buf);
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return 1;
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}
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static struct net_driver net_driver_loopback = {
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.head_reserve = 0,
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.open = net_driver_loopback_open,
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.send = net_driver_loopback_send,
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};
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int net_driver_loopback_init(void)
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{
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net_register_driver(&net_driver_loopback);
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return 0;
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}
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