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/*
* 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 the lwIP TCP/IP stack.
*
* Author: Dirk Ziegelmeier <dziegel@gmx.de>
*
*/
#include <stdio.h>
#include "lwip/apps/tftp_client.h"
#include "lwip/apps/tftp_server.h"
#include "tftp_example.h"
#include <string.h>
#if LWIP_UDP
/* Define a base directory for TFTP access
* ATTENTION: This code does NOT check for sandboxing,
* i.e. '..' in paths is not checked! */
#ifndef LWIP_TFTP_EXAMPLE_BASE_DIR
#define LWIP_TFTP_EXAMPLE_BASE_DIR ""
#endif
/* Define this to a file to get via tftp client */
#ifndef LWIP_TFTP_EXAMPLE_CLIENT_FILENAME
#define LWIP_TFTP_EXAMPLE_CLIENT_FILENAME "test.bin"
#endif
/* Define this to a server IP string */
#ifndef LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP
#define LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP "192.168.0.1"
#endif
static char full_filename[256];
static void *
tftp_open_file(const char* fname, u8_t is_write)
{
snprintf(full_filename, sizeof(full_filename), "%s%s", LWIP_TFTP_EXAMPLE_BASE_DIR, fname);
full_filename[sizeof(full_filename)-1] = 0;
if (is_write) {
return (void*)fopen(full_filename, "wb");
} else {
return (void*)fopen(full_filename, "rb");
}
}
static void*
tftp_open(const char* fname, const char* mode, u8_t is_write)
{
LWIP_UNUSED_ARG(mode);
return tftp_open_file(fname, is_write);
}
static void
tftp_close(void* handle)
{
fclose((FILE*)handle);
}
static int
tftp_read(void* handle, void* buf, int bytes)
{
int ret = fread(buf, 1, bytes, (FILE*)handle);
if (ret <= 0) {
return -1;
}
return ret;
}
static int
tftp_write(void* handle, struct pbuf* p)
{
while (p != NULL) {
if (fwrite(p->payload, 1, p->len, (FILE*)handle) != (size_t)p->len) {
return -1;
}
p = p->next;
}
return 0;
}
/* For TFTP client only */
static void
tftp_error(void* handle, int err, const char* msg, int size)
{
char message[100];
LWIP_UNUSED_ARG(handle);
memset(message, 0, sizeof(message));
MEMCPY(message, msg, LWIP_MIN(sizeof(message)-1, (size_t)size));
printf("TFTP error: %d (%s)", err, message);
}
static const struct tftp_context tftp = {
tftp_open,
tftp_close,
tftp_read,
tftp_write,
tftp_error
};
void
tftp_example_init_server(void)
{
tftp_init_server(&tftp);
}
void
tftp_example_init_client(void)
{
void *f;
err_t err;
ip_addr_t srv;
int ret = ipaddr_aton(LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP, &srv);
LWIP_ASSERT("ipaddr_aton failed", ret == 1);
LWIP_UNUSED_ARG(ret);
err = tftp_init_client(&tftp);
LWIP_ASSERT("tftp_init_client failed", err == ERR_OK);
f = tftp_open_file(LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, 1);
LWIP_ASSERT("failed to create file", f != NULL);
err = tftp_get(f, &srv, TFTP_PORT, LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, TFTP_MODE_OCTET);
LWIP_ASSERT("tftp_get failed", err == ERR_OK);
}
#endif /* LWIP_UDP */
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