C++实现通过ICMP实现ping，计算网络抖动，时延与丢包率

文章目录

- 目的
- 关于ICMP
- socket 编程实现ICMP
- - 编译error
  - 代码
- 参考博客
- 扩展了解

目的

通过C++编程实现ping，也算是对于SOCKET编程初步了解掌握。

了解ICMP协议
了解对应socket编程

关于ICMP

请参考我的博客Ping工作原理

socket 编程实现ICMP

Ping 使用 Internet 控制消息协议（ICMP）来测试主机之间的连通性。当用客户端发送一个 ping 请求时，则对应的发送一个 ICMP Echo 请求消息到目标主机，并等待目标主机回复一个 ICMP Echo 回应消息。如果目标主机接收到请求并且网络连接正常，则会返回一个回应消息，表示主机之间的网络连接是正常的。如果目标主机没有收到请求消息或网络连接不正常，则不会有回应消息返回。

编译error

winsock2.h 与 windows.h 先后顺序导致编译错误
在Windows环境下编程不可避免的会用到windows.h和winsock.h头文件，在默认情况下windows.h头文件会包含winsock.h，此时当尝试包含winsock.h时就会出现头文件定义冲突的情况。解决这个冲突的方式有两种，第一种，在头部定义#define WIN32_LEAN_AND_MEAN来主动去除winsock.h头文件包含。第二种是将#include <winsock2.h>头文件，放在#include<windows.h>之前。两种方式均可，这些方法在进行Windows套接字编程时非常重要，可以防止头文件冲突，确保编译顺利进行。
IPExport.h导致编译错误
还有一种是我遇到的 OptionsData 未知重写说明符， Data 未知重写说明符
需要将如下注释掉就行, 具体原因后续有时间整理下。

//#include <iphlpapi.h>
//#include <icmpapi.h>

代码

ICMPDataHeader.h

相关头文件声明与数据定义


#pragma once#define WIN32_LEAN_AND_MEAN
#include <iostream>
#include <vector>
#include <cmath>
#include <chrono>
#include <ctime>
//#include <iphlpapi.h>
//#include <icmpapi.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>#pragma comment(lib, "ws2_32.lib")
//#pragma comment(lib, "iphlpapi.lib")#define IP_RECORD_ROUTE  0x7// IP header structure
typedef struct _iphdr
{//Suppose the BYTE_ORDER is LITTLE_ENDIANunsigned int   h_len:4;        // Length of the headerunsigned int   version:4;      // Version of IPunsigned char  tos;            // Type of serviceunsigned short total_len;      // Total length of the packetunsigned short id;             // Unique identificationunsigned short frag_offset;    // Fragment offsetunsigned char  ttl;            // Time to liveunsigned char  protocol;       // Protocol (TCP, UDP etc)unsigned short checksum;       // IP checksumunsigned int   sourceIP;       // Source IPunsigned int   destIP;         // Destination IP
} IpHeader;#define ICMP_ECHO        8
#define ICMP_ECHOREPLY   0
#define ICMP_MIN         8 // Minimum 8-byte ICMP packet (header)// ICMP header structure
// This is not the standard header, but we reserve space for time
typedef struct _icmphdr
{BYTE   i_type;BYTE   i_code;                 // Type sub codeUSHORT i_cksum;USHORT i_id;USHORT i_seq;ULONG  timestamp;
} IcmpHeader;// IP option header - use with socket option IP_OPTIONS
typedef struct _ipoptionhdr
{unsigned char code;        // Option typeunsigned char len;         // Length of option hdrunsigned char ptr;         // Offset into optionsunsigned long addr[9];     // List of IP addrs
} IpOptionHeader;#define DEF_PACKET_SIZE  32        // Default packet size
#define MAX_PACKET       1024      // Max ICMP packet size
#define MAX_IP_HDR_SIZE  60        // Max IP header size w/options

关键核心代码 cpp

校验函数
#include "icmppacketprocessor.h"ICMPPacketProcessor::ICMPPacketProcessor(QObject* parent):QObject{parent}
{}ICMPPacketProcessor::~ICMPPacketProcessor()
{if(lpdest){delete lpdest;}
}unsigned short ICMPPacketProcessor::checksum(unsigned short *buffer, int size)
{unsigned long cksum=0;while(size > 1){cksum += *buffer++;size -= sizeof(unsigned short);}if(size){cksum += *(UCHAR*)buffer;}cksum = (cksum >> 16) + (cksum & 0xffff);cksum += (cksum >>16);return (unsigned short)(~cksum);
}// Function: FillICMPData
// Description:
//    Helper function to fill in various fields for our ICMP request
void ICMPPacketProcessor::fillICMPData(char *icmp_data, int datasize)
{IcmpHeader *icmp_hdr = NULL;char *datapart = NULL;icmp_hdr = (IcmpHeader*)icmp_data;icmp_hdr->i_type = ICMP_ECHO; // Request an ICMP echo, type is 8icmp_hdr->i_code = 0;    // code is 0icmp_hdr->i_id = (USHORT)GetCurrentProcessId();icmp_hdr->i_cksum = 0;icmp_hdr->i_seq = 0;datapart = icmp_data + sizeof(IcmpHeader);// Place some junk in the buffermemset(datapart, 'E' , datasize - sizeof(IcmpHeader));
}
// Function: DecodeIPOptions
// Description:
//    If the IP option header is present, find the IP options
//    within the IP header and print the record route option values
void ICMPPacketProcessor::decodeIPOptions(char *buf, int bytes)
{IpOptionHeader *ipopt = NULL;IN_ADDR         inaddr;int             i;HOSTENT        *host = NULL;ipopt = (IpOptionHeader *)(buf + 20);printf("Record Route:   ");for(i = 0; i < (ipopt->ptr / 4) - 1; i++){inaddr.S_un.S_addr = ipopt->addr[i];if (i != 0) printf("   ");host = gethostbyaddr(