用c++写ping命令的简单伪代码

哦，您想了解如何用C编写ping命令的伪代码。好的，以下是简单的代码示例：

#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>

int main(int argc, char *argv[]) {
    struct sockaddr_in addr;
    struct icmphdr icmp_hdr;
    struct sockaddr_in reply_addr;
    struct icmphdr reply_hdr;
    int sock, seq = 0;
    char recv_buf[1024];

    // Create a socket
    sock = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
    if (sock < 0) {
        perror("Socket creation failed");
        exit(1);
    }

    // Fill in the ICMP header
    icmp_hdr.type = ICMP_ECHO;
    icmp_hdr.code = 0;
    icmp_hdr.un.echo.id = getpid();
    icmp_hdr.un.echo.sequence = seq++;
    icmp_hdr.checksum = 0;
    icmp_hdr.checksum = checksum((unsigned short *)&icmp_hdr, sizeof(icmp_hdr));

    // Fill in the sockaddr_in structure
    memset(&addr, 0, sizeof(addr));
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = inet_addr(argv[1]);

    // Send the ICMP echo request
    if (sendto(sock, &icmp_hdr, sizeof(icmp_hdr), 0, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
        perror("Sendto failed");
        exit(1);
    }

    // Wait for a response
    int len = sizeof(reply_addr);
    if (recvfrom(sock, &recv_buf, sizeof(recv_buf), 0, (struct sockaddr *)&reply_addr, &len) < 0) {
        perror("Recvfrom failed");
        exit(1);
    }

    // Parse the response ICMP header
    memcpy(&reply_hdr, recv_buf + sizeof(struct iphdr), sizeof(struct icmphdr));
    if (reply_hdr.type == ICMP_ECHOREPLY && reply_hdr.un.echo.id == getpid()) {
        printf("Ping succeeded\n");
    } else {
        printf("Ping failed\n");
    }

    close(sock);
    return 0;
}

以上伪代码仅供参考，实际使用中可能需要做更多异常处理。希望能对您有所帮助。