实现linux下的基于C语言的一个严谨的TCP客户端与服务端的通信，支持推送指定长度数据（如1MB或10MB），支持慢发送usleep函数的调用并显示单位毫秒，客户端可以循环调用

以下是基于C语言实现的一个严谨的TCP客户端与服务端的通信，支持推送指定长度数据和慢发送usleep函数的调用，并显示单位毫秒。客户端可以循环调用。其中，客户端和服务端的通信方式为基于流的TCP连接。

服务端代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#define MAX_BUFFER_SIZE 10485760 // 10MB

int main(int argc, char *argv[]) {
    int server_socket, client_socket;
    struct sockaddr_in server_addr, client_addr;
    socklen_t client_addr_len;
    char buffer[MAX_BUFFER_SIZE];
    int buffer_len, total_sent, sent;
    long long send_size;
    int i, delay;

    if (argc != 3 && argc != 4) {
        printf("Usage: %s <port> <send_size> [delay]\n", argv[0]);
        return 1;
    }

    server_socket = socket(AF_INET, SOCK_STREAM, 0);
    if (server_socket == -1) {
        perror("socket");
        return 1;
    }

    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_port = htons(atoi(argv[1]));

    if (bind(server_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("bind");
        return 1;
    }

    if (listen(server_socket, 5) == -1) {
        perror("listen");
        return 1;
    }

    printf("Server started and listening on port %s\n", argv[1]);

    while (1) {
        client_addr_len = sizeof(client_addr);
        client_socket = accept(server_socket, (struct sockaddr *)&client_addr, &client_addr_len);
        if (client_socket == -1) {
            perror("accept");
            continue;
        }

        printf("Client %s:%d connected\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));

        buffer_len = 0;
        send_size = atoll(argv[2]);
        delay = argc == 4 ? atoi(argv[3]) : 0;
        while (buffer_len < send_size) {
            memset(buffer, 'a', sizeof(buffer));
            sent = send(client_socket, buffer, sizeof(buffer), 0);
            if (sent == -1) {
                perror("send");
                break;
            }
            buffer_len += sent;
            total_sent += sent;
            if (delay > 0) {
                usleep(delay);
            }
        }
        printf("Sent %d bytes to client %s:%d\n", total_sent, inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));

        close(client_socket);
        printf("Client %s:%d disconnected\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
    }

    close(server_socket);
    return 0;
}

客户端代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#define MAX_BUFFER_SIZE 10485760 // 10MB

int main(int argc, char *argv[]) {
    int client_socket;
    struct sockaddr_in server_addr;
    char buffer[MAX_BUFFER_SIZE];
    int buffer_len, total_recv, recv_len;
    long long recv_size;
    int i, delay;

    if (argc != 4 && argc != 5) {
        printf("Usage: %s <server_ip> <server_port> <recv_size> [delay]\n", argv[0]);
        return 1;
    }

    client_socket = socket(AF_INET, SOCK_STREAM, 0);
    if (client_socket == -1) {
        perror("socket");
        return 1;
    }

    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr(argv[1]);
    server_addr.sin_port = htons(atoi(argv[2]));

    if (connect(client_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
        perror("connect");
        return 1;
    }

    printf("Connected to server %s:%s\n", argv[1], argv[2]);

    buffer_len = 0;
    recv_size = atoll(argv[3]);
    delay = argc == 5 ? atoi(argv[4]) : 0;
    while (buffer_len < recv_size) {
        recv_len = recv(client_socket, buffer, sizeof(buffer), 0);
        if (recv_len == -1) {
            perror("recv");
            break;
        }
        buffer_len += recv_len;
        total_recv += recv_len;
        if (delay > 0) {
            usleep(delay);
        }
    }
    printf("Received %d bytes from server %s:%s\n", total_recv, argv[1], argv[2]);

    close(client_socket);
    return 0;
}

使用方法：

1. 在终端中编译服务端代码：`gcc server.c -o server`
2. 在终端中编译客户端代码：`gcc client.c -o client`
3. 启动服务端：`./server <port> <send_size> [delay]`，其中port为服务端监听的端口号，send_size为每次发送的数据大小，delay为发送延迟。如果不需要延迟，则可以不传入该参数。
4. 启动客户端：`./client <server_ip> <server_port> <recv_size> [delay]`，其中server_ip为服务端的IP地址，server_port为服务端的端口号，recv_size为每次接收的数据大小，delay为接收延迟。如果不需要延迟，则可以不传入该参数。
5. 客户端可以循环调用，以接收多次数据。