259 lines
6.9 KiB
C++
259 lines
6.9 KiB
C++
#include <cstring>
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#include <fcntl.h>
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#include <filesystem>
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#include <fstream>
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#include <iostream>
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#include <ostream>
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#include <pthread.h>
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#include <string>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <logger.hpp>
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#ifdef __SWITCH__
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#include <switch.h>
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#include <client.hpp>
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namespace fs = std::filesystem;
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#else
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namespace fs = std::__fs::filesystem;
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#endif
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#define PORT 8080
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#define BUFFER_SIZE 1024
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#define MULTICAST_PORT 8081
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#define MULTICAST_GROUP "239.0.0.1" // Multicast group IP
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struct ThreadArgs
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{
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char **filenames;
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int file_count;
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int sock;
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fs::path directory;
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};
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bool receiveAck(int sock)
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{
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char ack[4] = {0};
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int bytes_received = read(sock, ack, 3);
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return bytes_received > 0 && std::string(ack) == "ACK";
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}
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// Отправка строки с учетом её длины
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void send_string(int sock, const std::string &str)
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{
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size_t length = str.size();
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send(sock, &length, sizeof(length), 0);
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send(sock, str.c_str(), length, 0);
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}
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void *send_files_thread(void *args)
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{
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ThreadArgs *thread_args = static_cast<ThreadArgs *>(args);
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char **filenames = thread_args->filenames;
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int file_count = thread_args->file_count;
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int sock = thread_args->sock;
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fs::path cwd = thread_args->directory;
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delete thread_args;
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char buffer[BUFFER_SIZE];
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// Send the directory length
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std::cout << Logger::INFO << "cwd.filename is: " << cwd.filename().c_str() << std::endl; // Get the parent directory
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std::string dirname = cwd.parent_path().filename();
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uint32_t directory_len = dirname.size();
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send(sock, &directory_len, sizeof(directory_len), 0);
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// Send the dirname
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send(sock, dirname.c_str(), directory_len, 0);
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for (int i = 0; i < file_count; ++i)
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{
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std::string path = filenames[i];
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std::size_t found = path.find_last_of("/\\");
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std::string filename = path.substr(found+1);
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std::ifstream infile(path, std::ios::binary | std::ios::ate);
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if (!infile.is_open())
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{
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std::cout << Logger::ERROR << "File not found: " << filename.c_str() << std::endl;
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return nullptr;
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}
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// Get the size of the file
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std::streamsize file_size = infile.tellg();
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infile.seekg(0, std::ios::beg);
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// Send the filename length
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uint32_t filename_len = filename.size();
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std::cout << Logger::INFO << "Send filename length: " << filename_len << std::endl;
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send(sock, &filename_len, sizeof(filename_len), 0);
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// Send the filename
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std::cout << Logger::INFO << "Send file name: " << filename.c_str() << std::endl;
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send(sock, filename.c_str(), filename_len, 0);
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// Send the file size
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std::cout << Logger::INFO << "Send file size: " << file_size << std::endl;
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send(sock, &file_size, sizeof(file_size), 0);
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char buffer[BUFFER_SIZE];
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// Send the file data
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while (file_size > 0)
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{
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infile.read(buffer, BUFFER_SIZE);
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send(sock, buffer, infile.gcount(), 0);
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file_size -= infile.gcount();
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std::cout << Logger::INFO << "wait for ACK" << std::endl;
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// Wait for acknowledgment after each chunk
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if (!receiveAck(sock))
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{
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std::cout << Logger::ERROR << "Failed to receive acknowledgment" << std::endl;;
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}
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}
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send(sock, 0, 0, 0);
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std::cout << Logger::INFO << "File sent successfully: " << filename.c_str() << std::endl;
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infile.close();
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}
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close(sock);
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pthread_exit(nullptr);
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}
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int find_server(char *server_ip)
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{
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std::cout << Logger::INFO << "Init find_server" << std::endl;;
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int sockfd;
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struct sockaddr_in multicast_addr;
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std::cout << Logger::INFO << "Create socket" << std::endl;
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if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
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{
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std::cout << Logger::ERROR << "Socket creation error" << std::endl;
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return -1;
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}
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memset(&multicast_addr, 0, sizeof(multicast_addr));
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multicast_addr.sin_family = AF_INET;
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multicast_addr.sin_port = htons(MULTICAST_PORT);
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multicast_addr.sin_addr.s_addr = inet_addr(MULTICAST_GROUP);
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std::cout << Logger::INFO << "Send DISCOVER_SERVER" << std::endl;
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const char *multicast_message = "DISCOVER_SERVER";
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if (sendto(sockfd, multicast_message, strlen(multicast_message), 0, (struct sockaddr *)&multicast_addr, sizeof(multicast_addr)) < 0)
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{
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std::cout << Logger::ERROR << "sendto failed" << std::endl;
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close(sockfd);
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return -1;
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}
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else
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{
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std::cout << Logger::INFO << "send multicast message success" << std::endl;
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}
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struct sockaddr_in cliaddr;
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socklen_t len = sizeof(cliaddr);
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char buffer[BUFFER_SIZE];
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ssize_t n = recvfrom(sockfd, buffer, BUFFER_SIZE, 0, (struct sockaddr *)&cliaddr, &len);
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std::cout << Logger::INFO << "recvfrom n: %i" << n << std::endl;
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if (n < 0)
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{
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std::cout << Logger::ERROR << "recvfrom failed" << std::endl;
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close(sockfd);
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return -1;
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}
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std::cout << Logger::INFO << "buffer: " << buffer << std::endl;
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buffer[n] = '\0';
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if (strcmp(buffer, "SERVER_HERE") == 0)
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{
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std::cout << Logger::INFO << "Server found" << std::endl;
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inet_ntop(AF_INET, &cliaddr.sin_addr, server_ip, INET_ADDRSTRLEN);
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}
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else
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{
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std::cout << Logger::ERROR << "Unable to find server, close socket" << std::endl;;
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close(sockfd);
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return -1;
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}
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close(sockfd);
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return 0;
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}
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int transfer_files(fs::path directory, char **filenames, int file_count) {
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std::cout << Logger::INFO << "Init transfer_files" << std::endl;
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char server_ip[INET_ADDRSTRLEN];
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if (find_server(server_ip) != 0)
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{
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std::cout << Logger::ERROR << "Failed to find server" << std::endl;
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return -1;
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}
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int sock = 0;
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struct sockaddr_in serv_addr;
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
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{
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std::cout << Logger::ERROR << "Socket creation error" << std::endl;
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return -1;
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}
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = htons(PORT);
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if (inet_pton(AF_INET, server_ip, &serv_addr.sin_addr) <= 0)
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{
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std::cout << Logger::ERROR << "Invalid address / Address not supported" << std::endl;
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return -1;
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}
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if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
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{
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std::cout << Logger::ERROR << "Connection failed" << std::endl;
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return -1;
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}
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pthread_t file_thread;
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ThreadArgs *thread_args = new ThreadArgs{filenames, file_count, sock, directory};
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if (pthread_create(&file_thread, nullptr, send_files_thread,
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(void *)thread_args) < 0)
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{
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std::cout << Logger::ERROR << "Thread creation failed" << std::endl;
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close(sock);
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delete thread_args;
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return -1;
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}
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else
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{
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std::cout << Logger::INFO << "Wait for file_thread" << std::endl;
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pthread_join(file_thread, nullptr);
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}
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return 0;
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}
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#ifndef __SWITCH__ // for desktop
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int main(int argc, char *argv[])
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{
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if (argc < 2)
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{
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std::cerr << "Usage: " << argv[0] << " <filename1> <filename2> ..." << std::endl;
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return 1;
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}
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char **filenames = const_cast<char **>(&argv[1]);
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int file_count = argc - 1;
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transfer_files(filenames, file_count);
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return 0;
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}
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#endif
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