MQTT - Connect报文解析

矫情吗；* 2021-12-24 17:29 265阅读 0赞

#include <bits/stdc++.h>
    
    using namespace std;
    
    int main() {
      string s[82] = {
    /*
     * 固定报头: MQTT报文类型(1), 保留位
     */
          "0001 0000", 
        // 剩余长度(80)
          "01010000",
    
    /*
     * 可变报头
     */
        // MSB
          "00000000", 
        // LSB
          "00000110", 
        // 协议名: M Q I s d p
          "01001101", "01010001", "01001001", "01110011", "01100100", "01110000", 
        // 协议级别(3)
          "00000011", 
        // 连接标志(usernameflag(true), passwordflag(true), willretain(true), willqos(1), willflag(true), cleansession(true), reserved(0))
          "11101110", 
        // keeplive: MSB LSB (120s)
          "00000000", "01111000",
        
    /*
     * 有效载荷
     */
        // Client Id: MSB LSB (21)
          "00000000", "00010101", 
        // 7 y 0 w Q 8 V N J 4 l m B E i 2 R H O S N
          "00110111", "01111001", "00110000", "01110111", "01010001", 
          "00111000", "01010110", "01001110", "01001010", "00110100",
          "01101100", "01101101", "01000010", "01000101", "01101001", 
          "00110010", "01010010", "01001000", "01001111", "01010011", 
          "01001110", 
        // Will Topic: MSB LSB(3)
          "00000000", "00000011", 
        // A a a
          "01000001", "01100001", "01100001", 
        // Will Message: MSB LSB(24)
          "00000000", "00011000", 
        // i   a m   a   l a s t   w i l l   m e s s a g e
          "01101001", "00100000", "01100001", "01101101", "00100000", 
          "01100001", "00100000", "01101100", "01100001", "01110011", 
          "01110100", "00100000", "01110111", "01101001", "01101100", 
          "01101100", "00100000", "01101101", "01100101", "01110011", 
          "01110011", "01100001", "01100111", "01100101",
        // User name: MSB LSB(3)
          "00000000", "00000100", 
        // A o m i
          "01000001", "01101111", "01101101", "01101001", 
        // Password: MSB LSB(6)
          "00000000", "00000110", 
        // 1 2 3 4 5 6
          "00110001", "00110010", "00110011", "00110100", "00110101", 
          "00110110"};return 0;
    }

转载于:https://www.cnblogs.com/wuwangchuxin0924/p/10639700.html