Merge branch 'master' of ssh://master.iot-yun.com:2280/apue
New file |
| | |
| | | /*
|
| | | * crc-itu-t.c
|
| | | *
|
| | | * This source code is licensed under the GNU General Public License,
|
| | | * Version 2. See the file COPYING for more details.
|
| | | */
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| | |
|
| | | #include "crc-itu-t.h"
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| | |
|
| | | /** CRC table for the CRC ITU-T V.41 0x0x1021 (x^16 + x^12 + x^15 + 1) */
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| | | const unsigned short crc_itu_t_table[256] = {
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| | | 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
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| | | 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
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| | | 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
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| | | 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
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| | | 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
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| | | 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
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| | | 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
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| | | 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
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| | | 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
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| | | 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
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| | | 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
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| | | 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
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| | | 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
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| | | 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
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| | | 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
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| | | 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
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| | | 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
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| | | 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
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| | | 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
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| | | 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
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| | | 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
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| | | 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
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| | | 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
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| | | 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
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| | | 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
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| | | 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
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| | | 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
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| | | 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
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| | | 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
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| | | 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
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| | | 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
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| | | 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
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| | | };
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| | |
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| | | /**
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| | | * crc_itu_t - Compute the CRC-ITU-T for the data buffer
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| | | *
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| | | * @crc: previous CRC value
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| | | * @buffer: data pointer
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| | | * @len: number of bytes in the buffer
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| | | *
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| | | * Returns the updated CRC value
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| | | */
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| | | unsigned short crc_itu_t(unsigned short crc, const unsigned char *buffer, unsigned int len)
|
| | | {
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| | | while (len--)
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| | | crc = crc_itu_t_byte(crc, *buffer++);
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| | | return crc;
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| | | }
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| | |
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| | | int ushort_to_bytes(unsigned char *bytes, unsigned short val)
|
| | | {
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| | | int size = sizeof (unsigned short);
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| | | int i = 0;
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| | |
|
| | | if( !bytes )
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| | | return 0;
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| | |
|
| | | while (size)
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| | | {
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| | | *(bytes + --size) = (val >> ((8 * i++) & 0xFF));
|
| | | }
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| | |
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| | | return sizeof(unsigned short);
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| | | }
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| | |
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| | | unsigned short bytes_to_ushort(unsigned char *bytes, int len)
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| | | {
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| | | int i = 0;
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| | | unsigned short val = 0;
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| | |
|
| | | if( !bytes || len > sizeof(unsigned short) )
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| | | return 0;
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| | |
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| | | for(i=0; i<len; i++)
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| | | {
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| | | val += bytes[i];
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| | |
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| | | if (i < len - 1)
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| | | val = val << 8;
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| | | }
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| | |
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| | | return val;
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| | | }
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New file |
| | |
| | | /*
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| | | * crc-itu-t.h - CRC ITU-T V.41 routine
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| | | *
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| | | * Implements the standard CRC ITU-T V.41:
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| | | * Width 16
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| | | * Poly 0x0x1021 (x^16 + x^12 + x^15 + 1)
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| | | * Init 0
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| | | *
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| | | * This source code is licensed under the GNU General Public License,
|
| | | * Version 2. See the file COPYING for more details.
|
| | | */
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| | |
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| | | #ifndef CRC_ITU_T_H
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| | | #define CRC_ITU_T_H
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| | |
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| | | #define MAGIC_CRC 0x1E50
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| | |
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| | | extern const unsigned short crc_itu_t_table[256];
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| | |
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| | |
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| | | /**
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| | | * crc_itu_t - Compute the CRC-ITU-T for the data buffer
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| | | *
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| | | * @crc: previous CRC value, we use $IoT_MAGIC_CRC
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| | | * @buffer: data pointer
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| | | * @len: number of bytes in the buffer
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| | | *
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| | | * Returns the updated CRC value
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| | | */
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| | | extern unsigned short crc_itu_t(unsigned short magic_crc, const unsigned char *buffer, unsigned int len);
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| | |
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| | |
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| | | /*
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| | | * ushort_to_bytes - Convert unsigned short CRC16 value to two bytes
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| | | * @bytes: two bytes CRC16 value saving buffer, buffer size must more than 2 bytes
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| | | * @crc: crc_itu_t() compute returnd value( unsigned short CRC16 checksum)
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| | | */
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| | | extern int ushort_to_bytes(unsigned char *bytes, unsigned short val);
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| | |
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| | |
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| | | /*
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| | | * bytes_to_ushort - Convert two bytes mode CRC value into unsigned short CRC16 value |
| | | * @bytes: bytes mode CRC value first byte position
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| | | * @len: bytes mode CRC value length
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| | | */
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| | | extern unsigned short bytes_to_ushort(unsigned char *bytes, int len);
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| | |
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| | |
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| | | static inline unsigned short crc_itu_t_byte(unsigned short crc, const unsigned char data)
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| | | {
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| | | return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
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| | | }
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| | |
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| | | #endif /* CRC_ITU_T_H */
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| | |
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New file |
| | |
| | | |
| | | BINAME=tlv_sample |
| | | |
| | | all: |
| | | gcc *.c -o ${BINAME} |
| | | |
| | | clean: |
| | | rm -f ${BINAME} |
| | | |
| | | run: all |
| | | ./${BINAME} |
New file |
| | |
| | | /********************************************************************************* |
| | | * Copyright: (C) 2019 LingYun IoT studio |
| | | * All rights reserved. |
| | | * |
| | | * Filename: tlv_sample.c |
| | | * Description: This file |
| | | * |
| | | * Version: 1.0.0(03/27/2019) |
| | | * Author: Guo Wenxue <guowenxue@gmail.com> |
| | | * ChangeLog: 1, Release initial version on "03/27/2019 09:20:25 PM" |
| | | * |
| | | ********************************************************************************/ |
| | | |
| | | #include <stdio.h> |
| | | #include <string.h> |
| | | #include "crc-itu-t.h" |
| | | |
| | | #define OFF 0 |
| | | #define ON 1 |
| | | |
| | | #define BUFSIZE 128 |
| | | |
| | | /* TLV Packet format: |
| | | * |
| | | *+------------+---------+------------+-----------+-----------+ |
| | | *| Header(1B) | Tag(1B) | Length(1B) | Value(1B) | CRC16(2B) | |
| | | *+------------+---------+------------+-----------+-----------+ |
| | | */ |
| | | |
| | | #define PACK_HEADER 0xFD |
| | | |
| | | /* Tag definition */ |
| | | enum |
| | | { |
| | | TAG_LOGON=1, |
| | | TAG_CAMERA, |
| | | TAG_LED, |
| | | }; |
| | | |
| | | /* TLV packet fixed segement size, 1B Head, 1B Tag, 1B length, 2B CRC16, total 5B. */ |
| | | #define TLV_FIXED_SIZE 5 |
| | | |
| | | /* TLV packet Minimum size is fixed bytes + 1 byte data */ |
| | | #define TLV_MIN_SIZE (TLV_FIXED_SIZE+1) |
| | | |
| | | int packtlv_logon(char *buf, int size, char *pwd); |
| | | int packtlv_led(char *buf, int size, int cmd); |
| | | void dump_buf(char *data, int len); |
| | | |
| | | int main(int argc, char **argv) |
| | | { |
| | | char buf[BUFSIZE]; |
| | | int bytes; |
| | | |
| | | bytes = packtlv_led(buf, sizeof(buf), ON); |
| | | |
| | | /* print every byte in the buffer as HEX and corresponding charactor, |
| | | which is not printable charactor will be instead as '?' */ |
| | | dump_buf(buf, bytes); |
| | | |
| | | bytes = packtlv_logon(buf, sizeof(buf), "iot@yun"); |
| | | |
| | | dump_buf(buf, bytes); |
| | | |
| | | return 0; |
| | | } |
| | | |
| | | |
| | | int packtlv_logon(char *buf, int size, char *pwd) |
| | | { |
| | | unsigned short crc16 = 0; |
| | | int pack_len = 0; |
| | | int data_len = 0; |
| | | int ofset = 0; /* index position for the buf */ |
| | | |
| | | if(!buf || !pwd || size<TLV_MIN_SIZE ) |
| | | { |
| | | printf("Invalid input arguments\n"); |
| | | return 0; |
| | | } |
| | | |
| | | /* Packet head */ |
| | | buf[ofset] = PACK_HEADER; |
| | | ofset += 1; |
| | | |
| | | /* Tag */ |
| | | buf[ofset] = TAG_LOGON; |
| | | ofset += 1; |
| | | |
| | | /* $pwd too long maybe result buffer overflow, so we need check the buffer |
| | | * is large enuf or not. If buf size is not enuf we will truncate $pwd string */ |
| | | if( strlen(pwd) <= size-TLV_FIXED_SIZE ) |
| | | data_len = strlen(pwd); |
| | | else |
| | | data_len = size-TLV_FIXED_SIZE; |
| | | |
| | | /* Length, this packet is passwd length+5Byte () */ |
| | | pack_len = data_len + TLV_FIXED_SIZE; |
| | | |
| | | buf[ofset] = pack_len; |
| | | ofset += 1; |
| | | |
| | | memcpy(&buf[ofset], pwd, data_len); |
| | | ofset += data_len; |
| | | |
| | | /* Calc CRC16 checksum value from Packet Head(buf[0])~ Value(buf[ofset]) */ |
| | | crc16 = crc_itu_t(MAGIC_CRC, buf, ofset); |
| | | |
| | | /* Append the 2 Bytes CRC16 checksum value into the last two bytes in packet buffer */ |
| | | ushort_to_bytes(&buf[ofset], crc16); |
| | | ofset += 2; |
| | | |
| | | return ofset; |
| | | } |
| | | |
| | | |
| | | |
| | | int packtlv_led(char *buf, int size, int cmd) |
| | | { |
| | | unsigned short crc16; |
| | | int pack_len = TLV_FIXED_SIZE+1; /* Only 1 byte data */ |
| | | |
| | | if(!buf || size<TLV_MIN_SIZE ) |
| | | { |
| | | printf("Invalid input arguments\n"); |
| | | return 0; |
| | | } |
| | | |
| | | /* Packet head */ |
| | | buf[0] = PACK_HEADER; |
| | | |
| | | /* Tag */ |
| | | buf[1] = TAG_LED; |
| | | |
| | | /* Length, this packet total 6 bytes */ |
| | | buf[2] = pack_len; |
| | | |
| | | /* Value */ |
| | | buf[3] = (OFF==cmd) ? 0x00 : 0x01; |
| | | |
| | | /* Calc CRC16 checksum value from Packet Head(buf[0])~ Packet Value(buf[3]) */ |
| | | crc16 = crc_itu_t(MAGIC_CRC, buf, 4); |
| | | |
| | | /* Append the 2 Bytes CRC16 checksum value into the last two bytes in packet buffer */ |
| | | ushort_to_bytes(&buf[4], crc16); |
| | | |
| | | return pack_len; |
| | | } |
| | | |
| | | |
| | | /*+------------------------------+ |
| | | *| dump_buf() implement code | |
| | | *+------------------------------+*/ |
| | | |
| | | #define LINELEN 81 |
| | | #define CHARS_PER_LINE 16 |
| | | |
| | | static char *print_char = |
| | | " " |
| | | " " |
| | | " !\"#$%&'()*+,-./" |
| | | "0123456789:;<=>?" |
| | | "@ABCDEFGHIJKLMNO" |
| | | "PQRSTUVWXYZ[\\]^_" |
| | | "`abcdefghijklmno" |
| | | "pqrstuvwxyz{|}~ " |
| | | " " |
| | | " " |
| | | " ???????????????" |
| | | "????????????????" |
| | | "????????????????" |
| | | "????????????????" |
| | | "????????????????" |
| | | "????????????????"; |
| | | |
| | | /* print every byte in the buffer as HEX and corresponding charactor, which is not printable charactor will be instead as '?' */ |
| | | void dump_buf(char *data, int len) |
| | | { |
| | | int rc; |
| | | int idx; |
| | | char prn[LINELEN]; |
| | | char lit[CHARS_PER_LINE + 1]; |
| | | char hc[4]; |
| | | short line_done = 1; |
| | | |
| | | rc = len; |
| | | idx = 0; |
| | | lit[CHARS_PER_LINE] = '\0'; |
| | | |
| | | while (rc > 0) |
| | | { |
| | | if (line_done) |
| | | snprintf(prn, LINELEN, "%08X: ", idx); |
| | | do |
| | | { |
| | | unsigned char c = data[idx]; |
| | | snprintf(hc, 4, "%02X ", c); |
| | | strncat(prn, hc, 4); |
| | | lit[idx % CHARS_PER_LINE] = print_char[c]; |
| | | ++idx; |
| | | } while (--rc > 0 && (idx % CHARS_PER_LINE != 0)); |
| | | |
| | | line_done = (idx % CHARS_PER_LINE) == 0; |
| | | |
| | | if (line_done) |
| | | printf("%s %s\n", prn, lit); |
| | | else if (rc == 0) |
| | | strncat(prn, " ", LINELEN); |
| | | } |
| | | |
| | | if (!line_done) |
| | | { |
| | | lit[(idx % CHARS_PER_LINE)] = '\0'; |
| | | |
| | | while ((++idx % CHARS_PER_LINE) != 0) |
| | | strncat(prn, " ", LINELEN); |
| | | |
| | | printf("%s %s\n", prn, lit); |
| | | |
| | | } |
| | | } |
| | | |