如何在c++程序中ping某个ip

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip_icmp.h>
#include <arpa/inet.h>
#include <netdb.h>

#define ICMP_PACKET_SIZE 64
#define ICMP_ECHO_REQUEST 8
#define ICMP_ECHO_REPLY 0
#define ICMP_HEADER_SIZE 8

// 计算校验和
unsigned short calculateChecksum(unsigned short *buffer, int length) {
    unsigned long sum = 0;
    while (length > 1) {
        sum += *buffer++;
        length -= 2;
    }
    if (length == 1) {
        sum += *(unsigned char *)buffer;
    }
    sum = (sum >> 16) + (sum & 0xFFFF);
    sum += (sum >> 16);
    return (unsigned short)(~sum);
}

// 发送ICMP回显请求
void sendPingRequest(const char *ipAddress) {
    int sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
    if (sockfd < 0) {
        std::cerr << "Failed to create socket." << std::endl;
        return;
    }

    struct sockaddr_in destAddr;
    std::memset(&destAddr, 0, sizeof(destAddr));
    destAddr.sin_family = AF_INET;
    if (inet_pton(AF_INET, ipAddress, &(destAddr.sin_addr)) <= 0) {
        std::cerr << "Invalid IP address." << std::endl;
        close(sockfd);
        return;
    }

    // 构建ICMP报文
    char packet[ICMP_PACKET_SIZE];
    std::memset(packet, 0, sizeof(packet));
    struct icmp *icmpHeader = (struct icmp *)packet;
    icmpHeader->icmp_type = ICMP_ECHO_REQUEST;
    icmpHeader->icmp_code = 0;
    icmpHeader->icmp_id = getpid();
    icmpHeader->icmp_seq = 0;
    icmpHeader->icmp_cksum = 0;
    icmpHeader->icmp_cksum = calculateChecksum((unsigned short *)icmpHeader, ICMP_PACKET_SIZE);

    // 发送ICMP报文
    if (sendto(sockfd, packet, sizeof(packet), 0, (struct sockaddr *)&destAddr, sizeof(destAddr)) <= 0) {
        std::cerr << "Failed to send ICMP packet." << std::endl;
        close(sockfd);
        return;
    }

    close(sockfd);
}

int main() {
    const char *ipAddress = "127.0.0.1";  // 要ping的IP地址
    sendPingRequest(ipAddress);
    return 0;
}