如何在c＃中编写传统校验和的代码？ [英] How do I writing code for traditional checksum in c#?

问题描述

我需要编写代码来编写传统的校验和c＃

其中校验和在IP数据包中工作，校验和字段的值设置为0.然后，整个标题分为16-位部分并加在一起。结果（总和）被补充并插入校验和字段。我尝试编程但没有得到解决方案



我试过这段代码：

 < span class =code-keyword> int  sum =  0 ; 
 boolean m =  true ; 
  while （m）
 {
  string  input = Console。的ReadLine（）; 
  if （input ==   eof ）
 {
 m =  false ; 
} 
  else  
 {
  int 字; 
  Int32  .TryParse（输入， out 字）; 
 sum = sum + word; 
} 
} 
  int  left = sum>>  8 ; 
  int  right = sum& 0xFFFF的; 
 sum = right + left 
  int  checksum = ~sum; 

解决方案

将标题转换为 Uint16 的数组（参见声音代码：如何在C＃中将byte []转换为short []或float []数组[ ^ ]）然后总结这样的数组的所有项目，并最终补充结果（〜运算符（ C＃参考） [ ^ ]）。

I need to write code to programming traditional checksum by c#
Where checksum work in the IP Packet the value of the checksum field is set to 0. Then, the entire header is divided into 16-bit sections and added together. The result (sum) is complemented and inserted into the checksum field. I tried to programming but did not get to the solution

I tried by this code :

int sum = 0;
boolean m = true;
while( m )
{
   string input = Console.ReadLine();
   if( input == "eof" )
   {
      m= false;
   }
   else
   {
      int word;
      Int32.TryParse(input, out word);
      sum = sum + word;
   }
}
int left = sum >> 8;
int right = sum & 0xFFFF;
sum = right + left
int checksum = ~sum;

解决方案

Convert your header to an array of Uint16 (see Sound Code: How to convert byte[] to short[] or float[] arrays in C#[^]) then sum all the items of such array and eventually complement the result ( ~ Operator (C# Reference)[^]).

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