C++如何用socket进行网络通信_C++基于socket的TCP UDP通信实现

#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <iostream>

int main() {
    int server_fd, client_fd;
    struct sockaddr_in address;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};

    server_fd = socket(AF_INET, SOCK_STREAM, 0);
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(8080);

    bind(server_fd, (struct sockaddr *)&address, sizeof(address));
    listen(server_fd, 3);

    std::cout << "等待客户端连接...\n";
    client_fd = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen);

    read(client_fd, buffer, 1024);
    std::cout << "收到: " << buffer << std::endl;

    const char *response = "Hello from server";
    send(client_fd, response, strlen(response), 0);
    close(client_fd);
    close(server_fd);
    return 0;
}

#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <iostream>

int main() {
    int sock = socket(AF_INET, SOCK_STREAM, 0);
    struct sockaddr_in serv_addr;
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(8080);
    inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr);

    connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr));
    const char *msg = "Hello Server";
    send(sock, msg, strlen(msg), 0);

    char buffer[1024] = {0};
    read(sock, buffer, 1024);
    std::cout << "响应: " << buffer << std::endl;

    close(sock);
    return 0;
}

#include <sys/socket.h>
#include <netinet/in.h>
#include <iostream>
#include <cstring>

int main() {
    int sockfd;
    char buffer[1024];
    struct sockaddr_in servaddr, cliaddr;
    socklen_t len = sizeof(cliaddr);

    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = INADDR_ANY;
    servaddr.sin_port = htons(8080);

    bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr));

    std::cout << "UDP服务端启动，等待消息...\n";
    int n = recvfrom(sockfd, buffer, 1024, 0, (struct sockaddr *)&cliaddr, &len);
    buffer[n] = '\0';
    std::cout << "收到: " << buffer << std::endl;

    const char *response = "UDP Hello";
    sendto(sockfd, response, strlen(response), 0, (const struct sockaddr *)&cliaddr, len);
    close(sockfd);
    return 0;
}

#include <Winsock2.h>
#pragma comment(lib, "ws2_32.lib")

WSADATA wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);
// ... 正常使用socket函数
WSACleanup();