[作業] 網路程式設計 Week 7

網路程式設計 Week7

先說 C 的 string 真的好煩🤬🤬🤬🤬🤬🤬🤬🤬
分三個角色 Server、Viewer 跟很多 Clients
要先開 Server 的程式，再開 Viewer，最後是隨便你要幾個 Client
名字從 Client 記錄
Server 一直接收訊息，再送去 Viewer
執行結果

程式碼

Server

#include <stdio.h>
#include <winsock.h>

#define TARGET_IP "127.0.0.1"
#define TARGET_PORT 7777
#define MAXIMUM_CHAR 1024
#define CLIENT_NUM 2

int main()
{
    SOCKET server_socket, viewer_socket, client_socket;
    WSADATA data;
    struct sockaddr_in server, viewer, client;

    char message[MAXIMUM_CHAR], temp[MAXIMUM_CHAR];;
    int result, viewer_length, client_length;

    WSAStartup(0x101, &data);
    server_socket = socket(AF_INET, SOCK_STREAM, 0);
    server.sin_family = AF_INET;
    server.sin_port = htons(TARGET_PORT);
    server.sin_addr.s_addr = inet_addr(TARGET_IP);

    bind(server_socket, (struct sockaddr *) &server, sizeof(server));

    listen(server_socket, 5);

    printf("[Server]\n");
    printf("Wait viewer connecting...\n");
    viewer_length = sizeof(viewer);
    viewer_socket = accept(server_socket, (struct sockaddr *) &viewer, &viewer_length);


    printf("Server waits...\n");
    client_length = sizeof(client);
    while (1) {
        memset(message, 0, MAXIMUM_CHAR);
        client_socket = accept(server_socket, (struct sockaddr *) &client, &client_length);
        result = recv(client_socket, message, MAXIMUM_CHAR, 0);
        printf("Receive: %s\n", message);
        if (result <= 0) {
            break;
        }
        closesocket(client_socket);
        send(viewer_socket, message, strlen(message) + 1, 0);
    }
    closesocket(client_socket);
    closesocket(viewer_socket);
    closesocket(server_socket);

    WSACleanup();

    return 0;
}

Viewer

#include <stdio.h>
#include <winsock.h>

#define TARGET_IP "127.0.0.1"
#define TARGET_PORT 7777
#define MAXIMUM_CHAR 1024

int main()
{
    SOCKET server_socket;
    struct sockaddr_in server;
    WSADATA data;
    char message[MAXIMUM_CHAR];
    int result;

    WSAStartup(0x101, &data);
    server_socket = socket(AF_INET, SOCK_STREAM, 0);
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = inet_addr(TARGET_IP);
    server.sin_port = htons(TARGET_PORT);

    printf("[Viewer]\n");
    printf("Connect to server...\n");
    connect(server_socket, (struct sockaddr *) &server, sizeof(server));

    while (1) {
        memset(message, 0, MAXIMUM_CHAR);
        result = recv(server_socket, message, MAXIMUM_CHAR, 0);
        if (result <= 0) {
            break;
        }
        printf("%s\n", message);
    }
    closesocket(server_socket);
    WSACleanup();

    return 0;
}

Client

#include <stdio.h>
#include <winsock.h>

#define TARGET_IP "127.0.0.1"
#define TARGET_PORT 7777
#define MAXIMUM_CHAR 1024

int main()
{
    SOCKET server_socket;
    WSADATA data;
    struct sockaddr_in server;

    char name[MAXIMUM_CHAR], message[MAXIMUM_CHAR], temp[MAXIMUM_CHAR];;

    WSAStartup(0x101, &data);
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = inet_addr(TARGET_IP);
    server.sin_port = htons(TARGET_PORT);


    printf("[Client]\n");
    printf("Your name: ");
    gets(name);
    name[strlen(name)] = ':';
    while (1) {
        server_socket = socket(AF_INET, SOCK_STREAM, 0);
        memset(temp, 0, MAXIMUM_CHAR);
        memset(message, 0, MAXIMUM_CHAR);
        printf("Input: ");
        gets(message);
        printf("Send: %s\n", message);
        strcpy(temp, name);
        strcat(temp, message);
        strcpy(message, temp);
        connect(server_socket, (struct sockaddr *) &server, sizeof(server));
        send(server_socket, message, strlen(message) + 1, 0);
        closesocket(server_socket);
    }
    WSACleanup();

    return 0;
}

本週心得

還沒看老師影片跟 code 前，就在想要怎麼兜，訊息要怎麼不輪流傳，後來看老師的 code，就明瞭了！還有 C string 真的是很🤬（字被 ban 掉了），本來想做 ban words 跟 bye，但算了…

網路程式設計 Week7#

本週心得#

網路程式設計 Week7

本週心得