| [1] | 1 | /*
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| 2 | * TFTP.c
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| 3 | *
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| 4 | * Created: 26.05.2021 17:39:50
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| 5 | * Author: Admin
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| 6 | */
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| 7 |
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| 8 | #include "lwip/api.h"
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| 9 | #include "tftp_server.h"
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| 10 | #include "ff.h"
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| 11 | #include "string.h"
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| 12 | #include "log_and_debug.h"
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| 13 |
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| 14 | uint32_t TFTPbyteWrite = 0;
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| 15 | uint32_t TFTPbyteRead = 0;
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| 16 |
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| 17 | static void* tftp_open(const char* fname, const char* mode, u8_t write);
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| 18 | static void tftp_close(void* handle);
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| 19 | static int tftp_write(void* handle, struct pbuf* p);
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| 20 | static int tftp_read(void* handle, void* buf, int bytes);
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| 21 |
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| 22 | void tftpServer_init(void)
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| 23 | {
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| 24 | static const struct tftp_context tftp = {
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| 25 | tftp_open,
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| 26 | tftp_close,
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| 27 | tftp_read,
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| 28 | tftp_write,
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| 29 | };
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| 30 |
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| 31 | if(tftp_init(&tftp) == ERR_OK) __debug(DEBUG_SERVSE, "TFTP server started: port 69\r\n");
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| 32 | }
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| 33 |
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| 34 | static void* tftp_open(const char* fname, const char* mode, u8_t write)
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| 35 | {
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| 36 | void *file = NULL;
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| 37 | static FIL FSFileTFTP;
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| 38 |
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| 39 | __debug(DEBUG_SERVSE, "TFTP: path to file %s %s\r\n", fname, write ? "write" : "read");
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| 40 |
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| 41 | switch(write){
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| 42 | case 0:
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| 43 | if(f_open(&FSFileTFTP, fname, FA_READ) == FR_OK)file = (void*)&FSFileTFTP;
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| 44 | break;
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| 45 | case 1:
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| 46 | if(f_open(&FSFileTFTP, fname, FA_CREATE_ALWAYS | FA_WRITE) == FR_OK)file = (void*)&FSFileTFTP;
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| 47 | break;
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| 48 | }
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| 49 | return file;
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| 50 | }
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| 51 |
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| 52 | static void tftp_close(void* handle)
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| 53 | {
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| 54 | f_close((FIL*)handle);
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| 55 | TFTPbyteWrite = 0;
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| 56 | TFTPbyteRead = 0;
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| 57 | }
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| 58 |
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| 59 | static int tftp_write(void* handle, struct pbuf* p)
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| 60 | {
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| 61 | uint32_t TFTPbyteWritten = 0;
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| 62 | if((FIL*)handle == NULL) return -1;
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| 63 | f_lseek((FIL*)handle, TFTPbyteWrite);
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| 64 | if(f_write((FIL*)handle, p->payload, (UINT)p->len, (UINT*)&TFTPbyteWritten) != FR_OK)return -1;
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| 65 | TFTPbyteWrite += p->len;
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| 66 | return 0;
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| 67 | }
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| 68 |
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| 69 | static int tftp_read(void* handle, void* buf, int bytes)
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| 70 | {
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| 71 | uint32_t TFTPbyteReading = 0;
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| 72 | if((FIL*)handle == NULL) return -1;
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| 73 | f_lseek((FIL*)handle, TFTPbyteRead);
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| 74 | if(f_read((FIL*)handle, buf, (UINT)bytes, (UINT*)&TFTPbyteReading) != FR_OK)return -1;
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| 75 | TFTPbyteRead += bytes;
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| 76 | return TFTPbyteReading;
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| 77 | }
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| 78 |
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