在C++中获取Linux网络统计信息

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <netinet/ip_icmp.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <cstring>
#include <iostream>

void getNetworkStats() {
    int sock;
    struct ifreq ifr;
    struct net_device_stats stats;

    // 创建一个套接字
    sock = socket(AF_INET, SOCK_DGRAM, 0);
    if (sock < 0) {
        std::cerr << "Failed to create socket" << std::endl;
        return;
    }

    // 设置要获取统计信息的网络接口
    std::strcpy(ifr.ifr_name, "eth0");

    // 获取网络接口的统计信息
    if (ioctl(sock, SIOCGIFSTATS, &ifr) < 0) {
        std::cerr << "Failed to get network stats" << std::endl;
        close(sock);
        return;
    }

    // 将统计信息存储在stats结构体中
    std::memcpy(&stats, &ifr.ifr_ifru.ifru_stats, sizeof(stats));

    // 打印统计信息
    std::cout << "Received packets: " << stats.rx_packets << std::endl;
    std::cout << "Transmitted packets: " << stats.tx_packets << std::endl;
    std::cout << "Received bytes: " << stats.rx_bytes << std::endl;
    std::cout << "Transmitted bytes: " << stats.tx_bytes << std::endl;

    // 关闭套接字
    close(sock);
}

int main() {
    getNetworkStats();
    return 0;
}