1 | /*
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2 | * Redistribution and use in source and binary forms, with or without modification,
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3 | * are permitted provided that the following conditions are met:
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4 | *
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5 | * 1. Redistributions of source code must retain the above copyright notice,
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6 | * this list of conditions and the following disclaimer.
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7 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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8 | * this list of conditions and the following disclaimer in the documentation
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9 | * and/or other materials provided with the distribution.
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10 | * 3. The name of the author may not be used to endorse or promote products
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11 | * derived from this software without specific prior written permission.
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12 | *
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13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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14 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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15 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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16 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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17 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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18 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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19 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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20 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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21 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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22 | * OF SUCH DAMAGE.
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23 | *
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24 | * This file is part of the lwIP TCP/IP stack.
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25 | *
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26 | * Author: Dirk Ziegelmeier <dziegel@gmx.de>
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27 | *
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28 | */
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29 |
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30 | #include <stdio.h>
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31 |
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32 | #include "lwip/apps/tftp_server.h"
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33 | #include "tftp_example.h"
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34 |
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35 | #if LWIP_UDP
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36 |
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37 | static void*
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38 | tftp_open(const char* fname, const char* mode, u8_t is_write)
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39 | {
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40 | LWIP_UNUSED_ARG(mode);
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41 |
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42 | if (is_write) {
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43 | return (void*)fopen(fname, "wb");
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44 | } else {
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45 | return (void*)fopen(fname, "rb");
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46 | }
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47 | }
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48 |
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49 | static void
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50 | tftp_close(void* handle)
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51 | {
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52 | fclose((FILE*)handle);
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53 | }
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54 |
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55 | static int
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56 | tftp_read(void* handle, void* buf, int bytes)
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57 | {
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58 | int ret = fread(buf, 1, bytes, (FILE*)handle);
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59 | if (ret <= 0) {
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60 | return -1;
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61 | }
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62 | return ret;
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63 | }
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64 |
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65 | static int
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66 | tftp_write(void* handle, struct pbuf* p)
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67 | {
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68 | while (p != NULL) {
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69 | if (fwrite(p->payload, 1, p->len, (FILE*)handle) != (size_t)p->len) {
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70 | return -1;
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71 | }
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72 | p = p->next;
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73 | }
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74 |
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75 | return 0;
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76 | }
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77 |
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78 | static const struct tftp_context tftp = {
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79 | tftp_open,
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80 | tftp_close,
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81 | tftp_read,
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82 | tftp_write
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83 | };
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84 |
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85 | void
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86 | tftp_example_init(void)
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87 | {
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88 | tftp_init(&tftp);
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89 | }
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90 |
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91 | #endif /* LWIP_UDP */
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