mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-03 13:31:57 +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>
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/* net_driver_slip.c - Slip (serial line IP) 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 <net/net_core.h>
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#include <net/net_buf.h>
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#include "contiki/os/dev/slip.h"
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static int net_driver_slip_open(void)
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{
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NET_DBG("Initialized slip driver\n");
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return 0;
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}
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static int net_driver_slip_send(struct net_buf *buf)
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{
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NET_DBG("Sending %d bytes\n", buf->len);
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if (!slip_send(buf)) {
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/* Release the buffer because we sent all the data
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* successfully.
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*/
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net_buf_put(buf);
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return 1;
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}
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return 0;
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}
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static struct net_driver net_driver_slip = {
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.head_reserve = 0,
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.open = net_driver_slip_open,
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.send = net_driver_slip_send,
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};
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int net_driver_slip_init(void)
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{
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net_register_driver(&net_driver_slip);
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return 0;
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}
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