C++ Win 32 使用原始套接字获取所有ip数据包并分析（包括ping包）

/*页面编码：GBK 开发环境 VS2019 */

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <iostream>
#include<WinSock2.h>
#pragma comment(lib,"ws2_32.lib")

#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)

std::string Utf8ToGbk(const char* src_str)
{
int len = MultiByteToWideChar(CP_UTF8, 0, src_str, -1, NULL, 0);
wchar_t* wszGBK = new wchar_t[len + 1];
memset(wszGBK, 0, len * 2 + 2);
MultiByteToWideChar(CP_UTF8, 0, src_str, -1, wszGBK, len);
len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);
char* szGBK = new char[len + 1];
memset(szGBK, 0, len + 1);
WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, szGBK, len, NULL, NULL);
std::string strTemp(szGBK);
if (wszGBK) delete[] wszGBK;
if (szGBK) delete[] szGBK;
return strTemp;
}

typedef struct _IP_HEADER
{
char m_cVersionAndHanderLen; //版本信息（前4位），头长度（后4位）
char m_cTypeOfService; //服务类型8位
short m_sTotalLenOfPacket; //数据包长度
short m_sPacketID; //数据包标识
short m_sSliceinfo; //分片使用
char m_cTTL; //存活时间
char m_cTypeOfProtocol; //协议类型
short m_sChechSum; //校验和
unsigned int m_uiSourIp; //源IP地址
unsigned int m_uiDestIp; //目的IP地址
}IP_HEADER, * PIP_HEADER;

typedef struct _UDP_HEADER
{
unsigned short m_usSourPort; //源端口号16bit
unsigned short m_usDestPort; //目的端口号16bit
unsigned short m_usLength; //数据包长度16bit
unsigned short m_usCheckSum; //校验和16bit
}UDP_HEADER, * PUDP_HEADER;

int main()
{
WSADATA wsadata;
int ret = WSAStartup(MAKEWORD(2, 2), &wsadata); if (ret != 0) { printf("初始化winsock2失败！"); return -1; } //if (LOBYTE(wsadata.wVersion) != 2 || HIBYTE(wsadata.wVersion) != 2) { puts("版本号错误！"); return -1; }

SOCKADDR_IN saddr;
memset(&saddr, 0, sizeof(SOCKADDR_IN));
saddr.sin_family = AF_INET;
saddr.sin_port = htons(8080);
saddr.sin_addr.s_addr = inet_addr("192.168.125.9");

SOCKET sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_IP); if (sockfd < 0) { puts("创建套接字失败！"); return system("pause"); }

int on = 1;
setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on));

ret = bind(sockfd, (SOCKADDR*)&saddr, sizeof(SOCKADDR)); if (ret != 0) { puts("绑定失败！"); return system("pause"); }

DWORD dwlen[10], dwlenrtned = 0, optval = 1;
WSAIoctl(sockfd, SIO_RCVALL, &optval, sizeof(optval), &dwlen, sizeof(dwlen), &dwlenrtned, NULL, NULL); //允许套接字接收所有经过本机的网络数据包

char buf[500] = "";
int len = sizeof(SOCKADDR);
IP_HEADER iph;
UDP_HEADER udph;
while (1)
{
puts("等待接收数据......");
ret = recvfrom(sockfd, buf, 200, 0, (SOCKADDR*)&saddr, &len); if (ret < 0) { puts("接收错误！"); }

memcpy(&iph, buf, 20);
memcpy(&udph, buf + 20, 8);

in_addr ias, iad;
ias.S_un.S_addr = iph.m_uiSourIp;
iad.S_un.S_addr = iph.m_uiDestIp;

printf("协议类型：%d\n", iph.m_cTypeOfProtocol);
switch (iph.m_cTypeOfProtocol)
{
case IPPROTO_ICMP:
puts("收到ICMP包");
break;
case IPPROTO_IGMP:
puts("收到IGMP包");
break;
case IPPROTO_UDP:
puts("收到UDP包");
break;
case IPPROTO_TCP:
puts("收到TCP包");
break;
default:
puts("未指定协议类型");
break;
}

char str1[20];
char str2[20];
strcpy_s(str1, inet_ntoa(ias));
strcpy_s(str2, inet_ntoa(iad));

printf("源地址IP:%s 源地址端口：%d \n目标地址IP：%s 目标地址端口：%d \n", str1, ntohs(udph.m_usSourPort), str2, ntohs(udph.m_usDestPort));

std::string str = "0";
str= Utf8ToGbk(buf+28);
std::cout << "接收到的数据段：" << str << std::endl;
puts("");
}
closesocket(sockfd);
WSACleanup();

return system("pause");
}

注意：使用管理员模式运行，因为原始套接字的使用是需要管理员权限的。