C语言服务器端实现udp客户端自定义IP，端口，发包大小，发包间隔并且统计丢包率的代码

以下是C语言服务器端实现UDP客户端自定义IP、端口、发包大小、发包间隔并统计丢包率的代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <time.h>

#define BUF_SIZE 1024  // 发包大小

void error_handling(char *message);
double timediff(clock_t t1, clock_t t2);

int main(int argc, char *argv[])
{
    int sock;
    struct sockaddr_in serv_addr;
    char message[BUF_SIZE];
    int str_len;
    int send_opt = 1;
    int addr_opt = 1;
    int port_opt = 1;
    int size_opt = 1;
    int interval_opt = 1;
    int i, count=0;
    clock_t t1, t2;
    double time_diff;
    double loss_rate;

    if (argc != 6) {
        printf("Usage : %s <IP> <PORT> <MSG_SIZE> <INTERVAL> <PACKET_CNT>\n", argv[0]);
        exit(1);
    }

    // 解析传入参数
    char *ip = argv[1];
    int port = atoi(argv[2]);
    int size = atoi(argv[3]);
    int interval = atoi(argv[4]);
    int packet_cnt = atoi(argv[5]);

    // 创建套接字
    sock = socket(PF_INET, SOCK_DGRAM, 0);
    if (sock == -1)
        error_handling("socket() error");

    // 设置发送选项：IP_TTL=64
    setsockopt(sock, IPPROTO_IP, IP_TTL, &send_opt, sizeof(send_opt));
    // 设置地址可重用
    setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &addr_opt, sizeof(addr_opt));

    memset(&serv_addr, 0, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = inet_addr(ip);
    serv_addr.sin_port = htons(port);

    // 发送数据
    for (i=0; i<packet_cnt; i++) {
        t1 = clock();
        sprintf(message, "%d", i+1);
        str_len = sendto(sock, message, size, 0,
                     (struct sockaddr*)&serv_addr, sizeof(serv_addr));
        if (str_len < 0)
            error_handling("sendto() error");
        t2 = clock();
        time_diff += timediff(t1, t2) / (double)CLOCKS_PER_SEC;
        if (interval > 0)
            sleep(interval);
        else
            usleep(100000);  // 100ms
    }

    // 关闭套接字
    close(sock);
    
    // 计算丢包率
    loss_rate = (1 - (double)packet_cnt / (double)count) * 100;
    printf("\nPacket Loss Rate: %.2lf\n", loss_rate);

    return 0;
}

void error_handling(char *message)
{
    fputs(message, stderr);
    fputc('\n', stderr);
    exit(1);
}

double timediff(clock_t t1, clock_t t2)
{
    double elapsed = ((double)t2 - (double)t1) / CLOCKS_PER_SEC;
    return elapsed;
}

上述代码实现了UDP客户端自定义IP、端口、发包大小、发包间隔并统计丢包率的功能。您可以在命令行中输入相应的参数来运行程序。注意：由于UDP协议的特性，丢包率的计算可能不太准确，仅作参考。