85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#define PORT 8002
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#define BUFFER_SIZE 1024
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int main() {
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int server_socket, client_socket;
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struct sockaddr_in server_addr, client_addr;
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char buffer[BUFFER_SIZE];
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socklen_t client_addr_len = sizeof(client_addr);
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// 创建服务器 socket
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server_socket = socket(AF_INET, SOCK_STREAM, 0);
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if (server_socket == -1) {
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perror("服务器 socket 创建失败");
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exit(EXIT_FAILURE);
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}
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// 设置 SO_REUSEADDR
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int opt = 1;
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if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
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perror("设置 SO_REUSEADDR 失败");
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exit(EXIT_FAILURE);
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}
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// 设置服务器地址
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server_addr.sin_family = AF_INET;
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server_addr.sin_addr.s_addr = INADDR_ANY;
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server_addr.sin_port = htons(PORT);
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// 绑定服务器 socket
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if (bind(server_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1) {
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perror("绑定失败");
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close(server_socket);
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exit(EXIT_FAILURE);
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}
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// 开始监听
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if (listen(server_socket, 5) == -1) {
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perror("监听失败");
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close(server_socket);
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exit(EXIT_FAILURE);
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}
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printf("服务器已启动，等待客户端连接...\n");
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// 接受客户端连接
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client_socket = accept(server_socket, (struct sockaddr *)&client_addr, &client_addr_len);
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if (client_socket == -1) {
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perror("接受客户端连接失败");
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close(server_socket);
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exit(EXIT_FAILURE);
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}
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printf("客户端连接成功。\n");
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// 打开文件以写入接收到的数据
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FILE *file = fopen("received_file.txt", "w");
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if (!file) {
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perror("文件打开失败");
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close(client_socket);
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close(server_socket);
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exit(EXIT_FAILURE);
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}
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// 接收分块数据
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int bytes_received;
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while ((bytes_received = recv(client_socket, buffer, BUFFER_SIZE, 0)) > 0) {
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fwrite(buffer, 1, bytes_received, file);
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printf("接收到 %d 字节数据。\n", bytes_received);
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}
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printf("文件接收完成，已保存为 received_file.txt\n");
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// 关闭文件和 socket
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fclose(file);
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close(client_socket);
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close(server_socket);
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return 0;
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} |