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LwIP 2.2.1在STM32F407VET6平台 移植

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冯佳
2026-01-29 17:26:04 +08:00
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ThirdParty/lwip-2.2.1/contrib/apps/udpecho_raw/udpecho_raw.c vendored Normal file
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/*
* Copyright (c) 2016 Stephan Linz <linz@li-pro.net>, Li-Pro.Net
* All rights reserved.
*
* Based on examples provided by
* Iwan Budi Kusnanto <ibk@labhijau.net> (https://gist.github.com/iwanbk/1399729)
* Juri Haberland <juri@sapienti-sat.org> (https://lists.gnu.org/archive/html/lwip-users/2007-06/msg00078.html)
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 and a contribution to the lwIP TCP/IP stack.
*
* Credits go to Adam Dunkels (and the current maintainers) of this software.
*
* Stephan Linz rewrote this file to get a basic echo example.
*/
/**
* @file
* UDP echo server example using raw API.
*
* Echos all bytes sent by connecting client,
* and passively closes when client is done.
*
*/
#include "lwip/opt.h"
#include "lwip/debug.h"
#include "lwip/stats.h"
#include "lwip/udp.h"
#include "udpecho_raw.h"
#if LWIP_UDP
static struct udp_pcb *udpecho_raw_pcb;
static void
udpecho_raw_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p,
const ip_addr_t *addr, u16_t port)
{
LWIP_UNUSED_ARG(arg);
if (p != NULL) {
/* send received packet back to sender */
udp_sendto(upcb, p, addr, port);
/* free the pbuf */
pbuf_free(p);
}
}
void
udpecho_raw_init(void)
{
udpecho_raw_pcb = udp_new_ip_type(IPADDR_TYPE_ANY);
if (udpecho_raw_pcb != NULL) {
err_t err;
err = udp_bind(udpecho_raw_pcb, IP_ANY_TYPE, 7);
if (err == ERR_OK) {
udp_recv(udpecho_raw_pcb, udpecho_raw_recv, NULL);
} else {
/* abort? output diagnostic? */
}
} else {
/* abort? output diagnostic? */
}
}
#endif /* LWIP_UDP */