mirror of
https://github.com/lwip-tcpip/lwip.git
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156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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* Redistribution and use in source and binary forms, with or without modification,
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* 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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* 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF 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) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Dirk Ziegelmeier <dziegel@gmx.de>
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*
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*/
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#include <stdio.h>
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#include "lwip/apps/tftp_client.h"
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#include "lwip/apps/tftp_server.h"
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#include "tftp_example.h"
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#include <string.h>
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#if LWIP_UDP
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/* Define a base directory for TFTP access
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* ATTENTION: This code does NOT check for sandboxing,
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* i.e. '..' in paths is not checked! */
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#ifndef LWIP_TFTP_EXAMPLE_BASE_DIR
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#define LWIP_TFTP_EXAMPLE_BASE_DIR ""
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#endif
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/* Define this to a file to get via tftp client */
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#ifndef LWIP_TFTP_EXAMPLE_CLIENT_FILENAME
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#define LWIP_TFTP_EXAMPLE_CLIENT_FILENAME "test.bin"
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#endif
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/* Define this to a server IP string */
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#ifndef LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP
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#define LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP "192.168.0.1"
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#endif
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static char full_filename[256];
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static void *
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tftp_open_file(const char* fname, u8_t is_write)
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{
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snprintf(full_filename, sizeof(full_filename), "%s%s", LWIP_TFTP_EXAMPLE_BASE_DIR, fname);
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full_filename[sizeof(full_filename)-1] = 0;
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if (is_write) {
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return (void*)fopen(full_filename, "wb");
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} else {
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return (void*)fopen(full_filename, "rb");
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}
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}
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static void*
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tftp_open(const char* fname, const char* mode, u8_t is_write)
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{
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LWIP_UNUSED_ARG(mode);
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return tftp_open_file(fname, is_write);
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}
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static void
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tftp_close(void* handle)
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{
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fclose((FILE*)handle);
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}
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static int
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tftp_read(void* handle, void* buf, int bytes)
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{
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int ret = fread(buf, 1, bytes, (FILE*)handle);
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if (ret <= 0) {
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return -1;
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}
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return ret;
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}
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static int
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tftp_write(void* handle, struct pbuf* p)
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{
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while (p != NULL) {
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if (fwrite(p->payload, 1, p->len, (FILE*)handle) != (size_t)p->len) {
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return -1;
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}
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p = p->next;
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}
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return 0;
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}
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/* For TFTP client only */
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static void
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tftp_error(void* handle, int err, const char* msg, int size)
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{
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char message[100];
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LWIP_UNUSED_ARG(handle);
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memset(message, 0, sizeof(message));
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MEMCPY(message, msg, LWIP_MIN(sizeof(message)-1, (size_t)size));
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printf("TFTP error: %d (%s)", err, message);
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}
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static const struct tftp_context tftp = {
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tftp_open,
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tftp_close,
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tftp_read,
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tftp_write,
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tftp_error
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};
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void
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tftp_example_init_server(void)
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{
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tftp_init_server(&tftp);
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}
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void
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tftp_example_init_client(void)
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{
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void *f;
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err_t err;
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ip_addr_t srv;
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int ret = ipaddr_aton(LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP, &srv);
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LWIP_ASSERT("ipaddr_aton failed", ret == 1);
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err = tftp_init_client(&tftp);
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LWIP_ASSERT("tftp_init_client failed", err == ERR_OK);
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f = tftp_open_file(LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, 1);
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LWIP_ASSERT("failed to create file", f != NULL);
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err = tftp_get(f, &srv, TFTP_PORT, LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, TFTP_MODE_OCTET);
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LWIP_ASSERT("tftp_get failed", err == ERR_OK);
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}
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#endif /* LWIP_UDP */
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