/*********************************************************************************
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* Copyright: (C) 2018 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: tlv.c
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* Description: This file is TLV(Tag Length Value) protocal head file
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*
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* Version: 1.0.0(2018/10/14)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "2018/10/14 12:13:26"
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*
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********************************************************************************/
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#include <stdio.h>
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#include "tlv.h"
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void tlv_dump_buf(const char *prompt, char *buf, int size)
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{
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int i;
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if(!buf)
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return ;
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if(prompt)
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printf("%s", prompt);
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for(i=0; i<size; i++ )
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{
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printf("0x%02x ", buf[i]);
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}
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printf("\n");
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}
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int tlv_pack_ack(char *buf, int size)
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{
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if( !buf )
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return 0;
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if(size < 2)
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return 0;
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buf[0]=TAG_ACK; /* tag */
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buf[1]=0; /*length*/
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/*No data here*/
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return 2;
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}
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int tlv_pack_nak(char *buf, int size)
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{
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if( !buf )
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return 0;
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if(size < 2)
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return 0;
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buf[0]=TAG_NAK; /* tag */
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buf[1]=0; /* length*/
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/*No data here*/
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return 2;
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}
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