1448 lines
67 KiB
C++
1448 lines
67 KiB
C++
//
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// Created by WolverinDEV on 04/05/2020.
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//
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#include <event.h>
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#include <cassert>
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#include <netinet/tcp.h>
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#include <log/LogUtils.h>
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#include <misc/net.h>
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#include <misc/base64.h>
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#include <include/files/Config.h>
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#include "./LocalFileProvider.h"
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#include "./duration_utils.h"
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#include "./HTTPUtils.h"
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#include "./LocalFileTransfer.h"
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#if defined(TCP_CORK) && !defined(TCP_NOPUSH)
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#define TCP_NOPUSH TCP_CORK
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#endif
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using namespace ts::server::file;
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using namespace ts::server::file::transfer;
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#define MAX_HTTP_HEADER_SIZE (4096)
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inline void add_network_event(FileClient& transfer, event* ev, bool& ev_throttle_readd_flag, bool ignore_bandwidth) {
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timeval tv{0, 1}, *ptv{nullptr};
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{
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auto timeout = transfer.networking.disconnect_timeout;
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if(timeout.time_since_epoch().count() > 0) {
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auto now = std::chrono::system_clock::now();
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if(now < timeout) {
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auto duration = timeout - now;
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auto seconds = std::chrono::duration_cast<std::chrono::seconds>(timeout - now);
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duration -= seconds;
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auto microseconds = std::chrono::duration_cast<std::chrono::microseconds>(timeout - now);
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tv.tv_sec = seconds.count();
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tv.tv_usec = microseconds.count();
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}
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ptv = &tv;
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}
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}
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if(!ignore_bandwidth) {
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if(ev_throttle_readd_flag) return; /* we're already throttled */
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timeval ttv{};
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if(transfer.networking.throttle.should_throttle(ttv)) {
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if(transfer.networking.event_throttle)
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event_add(transfer.networking.event_throttle, &ttv);
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ev_throttle_readd_flag = true;
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return;
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}
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}
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event_add(ev, ptv);
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}
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void FileClient::add_network_read_event(bool ignore_bandwidth) {
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std::shared_lock slock{this->state_mutex};
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switch (this->state) {
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case STATE_FLUSHING:
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case STATE_DISCONNECTED:
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return;
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case STATE_AWAITING_KEY:
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case STATE_TRANSFERRING:
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break;
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default:
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assert(false);
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return;
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}
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if(this->state != STATE_AWAITING_KEY && this->state != STATE_TRANSFERRING)
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return;
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add_network_event(*this, this->networking.event_read, this->networking.add_event_read, ignore_bandwidth);
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}
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void FileClient::add_network_write_event(bool ignore_bandwidth) {
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std::shared_lock slock{this->state_mutex};
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this->add_network_write_event_nolock(ignore_bandwidth);
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}
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void FileClient::add_network_write_event_nolock(bool ignore_bandwidth) {
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switch (this->state) {
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case STATE_DISCONNECTED:
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return;
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case STATE_FLUSHING:
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/* flush our write buffer */
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break;
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case STATE_AWAITING_KEY:
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if(this->networking.protocol != FileClient::PROTOCOL_HTTPS) {
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assert(false);
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return;
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}
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break;
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case STATE_TRANSFERRING:
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break;
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default:
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assert(false);
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break;
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}
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add_network_event(*this, this->networking.event_write, this->networking.add_event_write, ignore_bandwidth);
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}
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bool FileClient::send_file_bytes(const void *snd_buffer, size_t size) {
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if(this->networking.protocol == FileClient::PROTOCOL_TS_V1) {
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return this->enqueue_network_buffer_bytes(snd_buffer, size);
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} else if(this->networking.protocol == FileClient::PROTOCOL_HTTPS) {
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this->networking.pipe_ssl.send(pipes::buffer_view{snd_buffer, size});
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return this->network_buffer.bytes > TRANSFER_MAX_CACHED_BYTES;
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} else {
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return false;
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}
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}
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bool FileClient::enqueue_network_buffer_bytes(const void *snd_buffer, size_t size) {
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auto tbuffer = allocate_buffer(size);
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tbuffer->length = size;
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tbuffer->offset = 0;
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memcpy(tbuffer->data, snd_buffer, size);
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size_t buffer_size;
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{
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std::lock_guard block{this->network_buffer.mutex};
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if(this->network_buffer.write_disconnected) {
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goto write_disconnected;
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}
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*this->network_buffer.buffer_tail = tbuffer;
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this->network_buffer.buffer_tail = &tbuffer->next;
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buffer_size = (this->network_buffer.bytes += size);
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}
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this->add_network_write_event(false);
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return buffer_size > TRANSFER_MAX_CACHED_BYTES;
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write_disconnected:
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deref_buffer(tbuffer);
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return false;
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}
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size_t FileClient::flush_network_buffer() {
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Buffer* current_head;
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size_t bytes;
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{
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std::lock_guard block{this->network_buffer.mutex};
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this->network_buffer.write_disconnected = true;
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bytes = std::exchange(this->network_buffer.bytes, 0);
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current_head = std::exchange(this->network_buffer.buffer_head, nullptr);
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this->network_buffer.buffer_tail = &this->network_buffer.buffer_head;
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}
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while(current_head) {
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auto next = current_head->next;
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deref_buffer(current_head);
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current_head = next;
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}
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return bytes;
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}
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NetworkingStartResult LocalFileTransfer::start_networking() {
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std::lock_guard nlock{this->network.mutex};
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assert(!this->network.active);
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this->network.active = true;
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this->network.event_base = event_base_new();
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if(!this->network.event_base) return NetworkingStartResult::OUT_OF_MEMORY;
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this->network.dispatch_thread = std::thread(&LocalFileTransfer::dispatch_loop_network, this);
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return NetworkingStartResult::SUCCESS;
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}
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NetworkingBindResult LocalFileTransfer::add_network_binding(const NetworkBinding &binding) {
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std::lock_guard nlock{this->network.mutex};
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if(!this->network.active)
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return NetworkingBindResult::NETWORKING_NOT_INITIALIZED;
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for(const auto& abinding : this->network.bindings) {
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if(net::address_equal(abinding->address, binding.address) && net::port(abinding->address) == net::port(binding.address))
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return NetworkingBindResult::BINDING_ALREADY_EXISTS;
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}
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NetworkingBindResult result{NetworkingBindResult::SUCCESS};
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auto abinding = std::make_shared<ActiveNetworkBinding>();
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abinding->handle = this;
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abinding->hostname = binding.hostname;
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memcpy(&abinding->address, &binding.address, sizeof(binding.address));
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abinding->file_descriptor = socket(abinding->address.ss_family, SOCK_STREAM | SOCK_NONBLOCK, 0);
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if(!abinding->file_descriptor) {
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//logWarning(LOG_FT, "Failed to allocate socket for {}: {}/{}", abinding->hostname, errno, strerror(errno));
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return NetworkingBindResult::FAILED_TO_ALLOCATE_SOCKET;
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}
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int enable = 1, disabled = 0;
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if (setsockopt(abinding->file_descriptor, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(int)) < 0)
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logWarning(LOG_FT, "Failed to activate SO_REUSEADDR for binding {} ({}/{})", abinding->hostname, errno, strerror(errno));
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if(setsockopt(abinding->file_descriptor, IPPROTO_TCP, TCP_NOPUSH, &disabled, sizeof disabled) < 0)
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logWarning(LOG_FT, "Failed to deactivate TCP_NOPUSH for binding {} ({}/{})", abinding->hostname, errno, strerror(errno));
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if(abinding->address.ss_family == AF_INET6) {
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if(setsockopt(abinding->file_descriptor, IPPROTO_IPV6, IPV6_V6ONLY, &enable, sizeof(int)) < 0)
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logWarning(LOG_FT, "Failed to activate IPV6_V6ONLY for IPv6 binding {} ({}/{})", abinding->hostname, errno, strerror(errno));
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}
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if(fcntl(abinding->file_descriptor, F_SETFD, FD_CLOEXEC) < 0)
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logWarning(LOG_FT, "Failed to set flag FD_CLOEXEC for binding {} ({}/{})", abinding->hostname, errno, strerror(errno));
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if (bind(abinding->file_descriptor, (struct sockaddr *) &abinding->address, sizeof(abinding->address)) < 0) {
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//logError(LOG_FT, "Failed to bind server to {}. (Failed to bind socket: {}/{})", binding->hostname, errno, strerror(errno));
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result = NetworkingBindResult::FAILED_TO_BIND;
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goto reset_binding;
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}
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if (listen(abinding->file_descriptor, 8) < 0) {
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//logError(LOG_FT, "Failed to bind server to {}. (Failed to listen: {}/{})", binding->hostname, errno, strerror(errno));
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result = NetworkingBindResult::FAILED_TO_LISTEN;
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goto reset_binding;
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}
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abinding->accept_event = event_new(this->network.event_base, abinding->file_descriptor, (unsigned) EV_READ | (unsigned) EV_PERSIST, &LocalFileTransfer::callback_transfer_network_accept, &*abinding);
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if(!abinding->accept_event) {
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result = NetworkingBindResult::OUT_OF_MEMORY;
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goto reset_binding;
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}
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event_add(abinding->accept_event, nullptr);
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logMessage(LOG_FT, "Started to listen on {}:{}", abinding->hostname, net::port(abinding->address));
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this->network.bindings.push_back(std::move(abinding));
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return NetworkingBindResult::SUCCESS;
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reset_binding:
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if(abinding->accept_event) {
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event_free(abinding->accept_event);
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abinding->accept_event = nullptr;
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}
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if(abinding->file_descriptor > 0)
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::close(abinding->file_descriptor);
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abinding->file_descriptor = 0;
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abinding->handle = nullptr;
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return result;
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}
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std::vector<NetworkBinding> LocalFileTransfer::active_network_bindings() {
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std::lock_guard nlock{this->network.mutex};
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std::vector<NetworkBinding> result{};
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result.reserve(this->network.bindings.size());
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for(const auto& binding : this->network.bindings) {
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auto& rbinding = result.emplace_back();
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rbinding.hostname = binding->hostname;
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memcpy(&rbinding.address, &binding->address, sizeof(rbinding.address));
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}
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return result;
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}
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NetworkingUnbindResult LocalFileTransfer::remove_network_binding(const NetworkBinding &binding) {
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std::lock_guard nlock{this->network.mutex};
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std::shared_ptr<ActiveNetworkBinding> abinding{};
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for(auto it = this->network.bindings.begin(); it != this->network.bindings.end(); it++) {
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abinding = *it;
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if(net::address_equal(abinding->address, binding.address) && net::port(abinding->address) == net::port(binding.address)) {
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this->network.bindings.erase(it);
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break;
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}
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abinding = nullptr;
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}
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if(!abinding)
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return NetworkingUnbindResult::UNKNOWN_BINDING;
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if(abinding->accept_event) {
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event_del_block(abinding->accept_event);
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event_free(abinding->accept_event);
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abinding->accept_event = nullptr;
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}
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if(abinding->file_descriptor > 0)
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::close(abinding->file_descriptor);
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abinding->file_descriptor = 0;
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abinding->handle = nullptr;
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return NetworkingUnbindResult::SUCCESS;
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}
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void LocalFileTransfer::shutdown_networking() {
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event_base* ev_base;
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std::thread dispatch_thread{};
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{
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std::lock_guard nlock{this->network.mutex};
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if(!this->network.active) return;
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this->network.active = false;
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for(auto& binding : this->network.bindings) {
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if(binding->accept_event) {
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event_del_block(binding->accept_event);
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event_free(binding->accept_event);
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binding->accept_event = nullptr;
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}
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if(binding->file_descriptor > 0)
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::close(binding->file_descriptor);
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binding->file_descriptor = 0;
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binding->handle = nullptr;
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}
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this->network.bindings.clear();
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ev_base = std::exchange(this->network.event_base, nullptr);
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std::swap(this->network.dispatch_thread, dispatch_thread);
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}
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{
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std::unique_lock tlock{this->transfers_mutex};
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auto transfers = this->transfers_;
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tlock.unlock();
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for(const auto& transfer : transfers) {
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std::unique_lock slock{transfer->state_mutex};
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this->disconnect_client(transfer, slock, false);
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}
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}
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if(ev_base)
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event_base_loopbreak(ev_base);
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if(dispatch_thread.joinable())
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dispatch_thread.join();
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if(ev_base)
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event_base_free(ev_base);
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}
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void LocalFileTransfer::dispatch_loop_network(void *provider_ptr) {
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auto provider = reinterpret_cast<LocalFileTransfer*>(provider_ptr);
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while(provider->network.active) {
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assert(provider->network.event_base);
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event_base_loop(provider->network.event_base, EVLOOP_NO_EXIT_ON_EMPTY);
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}
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}
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NetworkInitializeResult LocalFileTransfer::initialize_networking(const std::shared_ptr<FileClient> &client, int file_descriptor) {
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client->networking.file_descriptor = file_descriptor;
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client->networking.event_read = event_new(this->network.event_base, file_descriptor, EV_READ, &LocalFileTransfer::callback_transfer_network_read, &*client);
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client->networking.event_write = event_new(this->network.event_base, file_descriptor, EV_WRITE, &LocalFileTransfer::callback_transfer_network_write, &*client);
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client->networking.event_throttle = evtimer_new(this->network.event_base, &LocalFileTransfer::callback_transfer_network_throttle, &*client);
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if(!client->networking.event_read || !client->networking.event_write || !client->networking.event_throttle)
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goto oom_exit;
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client->add_network_read_event(true);
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client->timings.connected = std::chrono::system_clock::now();
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client->timings.last_write = client->timings.connected;
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client->timings.last_read = client->timings.connected;
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return NetworkInitializeResult::SUCCESS;
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oom_exit:
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if(auto event{std::exchange(client->networking.event_read, nullptr)}; event)
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event_free(event);
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if(auto event{std::exchange(client->networking.event_write, nullptr)}; event)
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event_free(event);
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if(auto event{std::exchange(client->networking.event_throttle, nullptr)}; event)
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event_free(event);
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return NetworkInitializeResult::OUT_OF_MEMORY;
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}
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void LocalFileTransfer::finalize_networking(const std::shared_ptr<FileClient> &client, std::unique_lock<std::shared_mutex>& state_lock) {
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assert(state_lock.owns_lock());
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auto ev_read = std::exchange(client->networking.event_read, nullptr);
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auto ev_write = std::exchange(client->networking.event_write, nullptr);
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auto ev_throttle = std::exchange(client->networking.event_throttle, nullptr);
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state_lock.unlock();
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if (ev_read) {
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event_del_block(ev_read);
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event_free(ev_read);
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}
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if (ev_write) {
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event_del_block(ev_write);
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event_free(ev_write);
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}
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if (ev_throttle) {
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event_del_block(ev_throttle);
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event_free(ev_throttle);
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}
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state_lock.lock();
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if (client->networking.file_descriptor > 0) {
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::shutdown(client->networking.file_descriptor, SHUT_RDWR);
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::close(client->networking.file_descriptor);
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}
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client->networking.file_descriptor = 0;
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}
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#if 0
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void dp_log(void* ptr, pipes::Logger::LogLevel level, const std::string& name, const std::string& message, ...) {
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auto max_length = 1024 * 8;
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char buffer[max_length];
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va_list args;
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va_start(args, message);
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max_length = vsnprintf(buffer, max_length, message.c_str(), args);
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va_end(args);
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debugMessage(LOG_GENERAL, "[{}][{}] {}", level, name, std::string{buffer});
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}
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#endif
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bool LocalFileTransfer::initialize_client_ssl(const std::shared_ptr<FileClient> &client) {
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std::string error;
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auto& ssl_pipe = client->networking.pipe_ssl;
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std::shared_ptr<pipes::SSL::Options> options{};
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auto ssl_option_supplier = config::ssl_option_supplier;
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if(!ssl_option_supplier || !(options = ssl_option_supplier())) {
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logError(0, "{} Failed to initialize client SSL pipe because we've no SSL options.", client->log_prefix());
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client->flush_network_buffer(); /* invalidate all network write operations */
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std::unique_lock slock{client->state_mutex};
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client->handle->disconnect_client(client, slock, true);
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return false;
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}
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if(!ssl_pipe.initialize(options, error)) {
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logWarning(0, "{} Failed to initialize client SSL pipe ({}). Disconnecting client.", client->log_prefix(), error);
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client->flush_network_buffer(); /* invalidate all network write operations */
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std::unique_lock slock{client->state_mutex};
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client->handle->disconnect_client(client, slock, true);
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return false;
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}
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#if 0
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auto logger = std::make_shared<pipes::Logger>();
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logger->callback_log = dp_log;
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ssl_pipe.logger(logger);
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#endif
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ssl_pipe.direct_process(pipes::PROCESS_DIRECTION_IN, true);
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ssl_pipe.direct_process(pipes::PROCESS_DIRECTION_OUT, true);
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ssl_pipe.callback_initialized = [client] {
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logTrace(LOG_FT, "{} SSL layer has been initialized", client->log_prefix());
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};
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ssl_pipe.callback_data([&, client](const pipes::buffer_view& message) {
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client->handle->handle_transfer_read(client, message.data_ptr<char>(), message.length());
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});
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ssl_pipe.callback_error([client](int error, const std::string & error_detail) {
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logMessage(LOG_FT, "{} Received SSL error ({}/{}). Closing connection.", client->log_prefix(), error, error_detail);
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std::unique_lock slock{client->state_mutex};
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client->handle->disconnect_client(client, slock, false);
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});
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|
|
ssl_pipe.callback_write([client](const pipes::buffer_view& buffer) {
|
|
client->enqueue_network_buffer_bytes(buffer.data_ptr(), buffer.length());
|
|
client->add_network_write_event(false);
|
|
});
|
|
|
|
return true;
|
|
}
|
|
|
|
void LocalFileTransfer::finalize_client_ssl(const std::shared_ptr<FileClient> &client) {
|
|
auto& ssl_pipe = client->networking.pipe_ssl;
|
|
|
|
ssl_pipe.callback_initialized = []{};
|
|
ssl_pipe.callback_write([](const pipes::buffer_view&){});
|
|
ssl_pipe.callback_error([](auto, const auto&){});
|
|
ssl_pipe.callback_data([](const auto&){});
|
|
}
|
|
|
|
void LocalFileTransfer::callback_transfer_network_accept(int fd, short, void *ptr_binding) {
|
|
auto binding = reinterpret_cast<ActiveNetworkBinding*>(ptr_binding);
|
|
auto transfer = binding->handle;
|
|
|
|
sockaddr_storage address{};
|
|
socklen_t address_length{sizeof(address)};
|
|
auto client_fd = ::accept4(fd, reinterpret_cast<sockaddr*>(&address), &address_length, 0); //SOCK_NONBLOCK
|
|
if(client_fd <= 0) {
|
|
/* TODO: Reserve one file descriptor in case of out of file descriptors (see current implementation) */
|
|
logError(LOG_FT, "Failed to accept new client: {}/{}", errno, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
int enabled = 1;
|
|
if(setsockopt(client_fd, IPPROTO_TCP, TCP_NODELAY, &enabled, sizeof enabled) < 0)
|
|
logError(LOG_FT, "Cant enable TCP no delay for socket {}. Error: {}/{}", client_fd, errno, strerror(errno));
|
|
|
|
auto client = std::make_shared<FileClient>(transfer);
|
|
memcpy(&client->networking.address, &address, sizeof(sockaddr_storage));
|
|
|
|
logMessage(LOG_FT, "{} Connection received.", client->log_prefix());
|
|
auto ninit = transfer->initialize_networking(client, client_fd);
|
|
switch(ninit) {
|
|
case NetworkInitializeResult::SUCCESS: {
|
|
std::lock_guard tlock{transfer->transfers_mutex};
|
|
transfer->transfers_.push_back(std::move(client));
|
|
return;
|
|
}
|
|
case NetworkInitializeResult::OUT_OF_MEMORY:
|
|
client->state = FileClient::STATE_DISCONNECTED; /* required else the deallocate assert will fail */
|
|
logError(LOG_FT, "{} Failed to initialize transfer client because we ran out of memory. Closing connection.", client->log_prefix());
|
|
::close(client_fd);
|
|
return;
|
|
|
|
default:
|
|
client->state = FileClient::STATE_DISCONNECTED; /* required else the deallocate assert will fail */
|
|
logError(LOG_FT, "{} Failed to initialize transfer client. Closing connection.", client->log_prefix());
|
|
::close(client_fd);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void LocalFileTransfer::callback_transfer_network_throttle(int, short, void *ptr_transfer) {
|
|
auto transfer = reinterpret_cast<FileClient*>(ptr_transfer);
|
|
|
|
if(std::exchange(transfer->networking.add_event_write, false))
|
|
transfer->add_network_write_event(true);
|
|
|
|
if(std::exchange(transfer->networking.add_event_read, false))
|
|
transfer->add_network_read_event(true);
|
|
}
|
|
|
|
void LocalFileTransfer::callback_transfer_network_read(int fd, short events, void *ptr_transfer) {
|
|
auto transfer = reinterpret_cast<FileClient*>(ptr_transfer);
|
|
std::shared_ptr<FileClient> client{};
|
|
try {
|
|
client = transfer->shared_from_this();
|
|
} catch (std::bad_weak_ptr& ex) {
|
|
logCritical(LOG_FT, "Network read worker encountered a bad weak ptr to a client. This indicated something went horribly wrong! Please submit this on https://forum.teaspeak.de !!!");
|
|
return;
|
|
}
|
|
|
|
if((unsigned) events & (unsigned) EV_TIMEOUT) {
|
|
/* should never happen, receive timeouts are done via the client tick */
|
|
}
|
|
|
|
if((unsigned) events & (unsigned) EV_READ) {
|
|
constexpr size_t buffer_size{4096};
|
|
char buffer[buffer_size];
|
|
|
|
while(true) {
|
|
const auto max_read_buffer = transfer->networking.throttle.bytes_left();
|
|
if(!max_read_buffer) break; /* network throttle */
|
|
|
|
errno = 0;
|
|
auto read = ::recv(fd, buffer, std::min(buffer_size, std::min(max_read_buffer, transfer->networking.max_read_buffer_size)), MSG_NOSIGNAL | MSG_DONTWAIT);
|
|
//logTrace(0, "Read {}, max {} | {}", read, std::min(buffer_size, std::min(max_read_buffer, transfer->networking.max_read_buffer_size)), max_read_buffer);
|
|
if(read <= 0) {
|
|
if(read == 0) {
|
|
std::unique_lock slock{transfer->state_mutex};
|
|
auto original_state = transfer->state;
|
|
transfer->handle->disconnect_client(client, slock, true);
|
|
slock.unlock();
|
|
|
|
switch(original_state) {
|
|
case FileClient::STATE_AWAITING_KEY:
|
|
logMessage(LOG_FT, "{} Disconnected without sending any key or initializing a transfer.", transfer->log_prefix());
|
|
break;
|
|
case FileClient::STATE_TRANSFERRING: {
|
|
assert(transfer->transfer);
|
|
|
|
/* since we're counting the bytes directly on read, a disconnect would mean that not all data has been transferred */
|
|
if(transfer->transfer->direction == Transfer::DIRECTION_UPLOAD) {
|
|
logMessage(LOG_FT, "{} Disconnected while receiving file. Received {} out of {} bytes",
|
|
transfer->log_prefix(), transfer->statistics.file_transferred.total_bytes, transfer->transfer->expected_file_size - transfer->transfer->file_offset);
|
|
} else if(transfer->transfer->direction == Transfer::DIRECTION_DOWNLOAD) {
|
|
logMessage(LOG_FT, "{} Disconnected while sending file. Send {} out of {} bytes",
|
|
transfer->log_prefix(), transfer->statistics.file_transferred.total_bytes, transfer->transfer->expected_file_size - transfer->transfer->file_offset);
|
|
}
|
|
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::UNEXPECTED_CLIENT_DISCONNECT, "" });
|
|
break;
|
|
}
|
|
case FileClient::STATE_FLUSHING:
|
|
logMessage(LOG_FT, "{} Remote client closed connection. Finalizing disconnect.", transfer->log_prefix());
|
|
break;
|
|
|
|
case FileClient::STATE_DISCONNECTED:
|
|
default:
|
|
break;
|
|
}
|
|
} else {
|
|
if(errno == EAGAIN) {
|
|
transfer->add_network_read_event(false);
|
|
return;
|
|
}
|
|
|
|
std::unique_lock slock{transfer->state_mutex};
|
|
auto original_state = transfer->state;
|
|
transfer->handle->disconnect_client(client, slock, true);
|
|
slock.unlock();
|
|
|
|
switch(original_state) {
|
|
case FileClient::STATE_AWAITING_KEY:
|
|
logMessage(LOG_FT, "{} Received a read error for an unauthenticated client: {}/{}. Closing connection.", transfer->log_prefix(), errno, strerror(errno));
|
|
break;
|
|
case FileClient::STATE_TRANSFERRING:
|
|
assert(transfer->transfer);
|
|
|
|
/* since we're counting the bytes directly on read, a disconnect would mean that not all data has been transferred */
|
|
if(transfer->transfer->direction == Transfer::DIRECTION_UPLOAD) {
|
|
logMessage(LOG_FT, "{} Received read error while receiving file. Received {} out of {} bytes: {}/{}",
|
|
transfer->log_prefix(), transfer->statistics.file_transferred.total_bytes, transfer->transfer->expected_file_size - transfer->transfer->file_offset, errno, strerror(errno));
|
|
} else if(transfer->transfer->direction == Transfer::DIRECTION_DOWNLOAD) {
|
|
logMessage(LOG_FT, "{} Received read error while sending file. Send {} out of {} bytes: {}/{}",
|
|
transfer->log_prefix(), transfer->statistics.file_transferred.total_bytes, transfer->transfer->expected_file_size - transfer->transfer->file_offset, errno, strerror(errno));
|
|
}
|
|
|
|
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::NETWORK_IO_ERROR, strerror(errno) });
|
|
break;
|
|
case FileClient::STATE_FLUSHING:
|
|
case FileClient::STATE_DISCONNECTED:
|
|
default:
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
return;
|
|
} else {
|
|
transfer->timings.last_read = std::chrono::system_clock::now();
|
|
transfer->statistics.network_received.increase_bytes(read);
|
|
bool throttle_read = transfer->networking.throttle.increase_bytes(read);
|
|
|
|
if(transfer->state != FileClient::STATE_AWAITING_KEY && !(transfer->state == FileClient::STATE_TRANSFERRING && transfer->transfer->direction == Transfer::DIRECTION_UPLOAD)) {
|
|
debugMessage(LOG_FT, "{} Received {} bytes without any need. Dropping them.", transfer->log_prefix(), read);
|
|
return;
|
|
}
|
|
|
|
size_t bytes_buffered{0};
|
|
if(transfer->state == FileClient::STATE_AWAITING_KEY) {
|
|
bytes_buffered = transfer->handle->handle_transfer_read_raw(client, buffer, read);
|
|
} else if(transfer->state == FileClient::STATE_TRANSFERRING) {
|
|
if(transfer->transfer->direction == Transfer::DIRECTION_UPLOAD) {
|
|
bytes_buffered = transfer->handle->handle_transfer_read_raw(client, buffer, read);
|
|
} else {
|
|
debugMessage(LOG_FT, "{} Received {} bytes without any need. Dropping them.", transfer->log_prefix(), read);
|
|
}
|
|
}
|
|
|
|
if(transfer->state == FileClient::STATE_FLUSHING || transfer->state == FileClient::STATE_DISCONNECTED)
|
|
break;
|
|
|
|
if(bytes_buffered > TRANSFER_MAX_CACHED_BYTES) {
|
|
transfer->network_buffer.buffering_stopped = true;
|
|
debugMessage(LOG_FT, "{} Stopping network read, temp buffer full.", transfer->log_prefix());
|
|
return; /* no read event readd, buffer filled */
|
|
}
|
|
|
|
if(throttle_read)
|
|
break;
|
|
}
|
|
}
|
|
|
|
transfer->add_network_read_event(false); /* read event is not persistent */
|
|
}
|
|
}
|
|
|
|
void LocalFileTransfer::callback_transfer_network_write(int fd, short events, void *ptr_transfer) {
|
|
auto transfer = reinterpret_cast<FileClient*>(ptr_transfer);
|
|
std::shared_ptr<FileClient> client{};
|
|
try {
|
|
client = transfer->shared_from_this();
|
|
} catch (std::bad_weak_ptr& ex) {
|
|
logCritical(LOG_FT, "Network write worker encountered a bad weak ptr to a client. This indicated something went horribly wrong! Please submit this on https://forum.teaspeak.de !!!");
|
|
return;
|
|
}
|
|
|
|
if((unsigned) events & (unsigned) EV_TIMEOUT) {
|
|
if(transfer->state == FileClient::STATE_FLUSHING) {
|
|
{
|
|
std::unique_lock nb_lock{transfer->network_buffer.mutex};
|
|
if(transfer->network_buffer.bytes > 0) {
|
|
nb_lock.unlock();
|
|
transfer->flush_network_buffer();
|
|
debugMessage(LOG_FT, "{} Failed to flush networking buffer in given timeout. Marking it as flushed.", transfer->log_prefix());
|
|
}
|
|
}
|
|
|
|
|
|
if(!std::exchange(transfer->finished_signal_send, true)) {
|
|
if(transfer->transfer) {
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::NETWORK_IO_ERROR, "failed to flush outgoing buffer" });
|
|
}
|
|
}
|
|
|
|
transfer->handle->test_disconnecting_state(client);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if((unsigned) events & (unsigned) EV_WRITE) {
|
|
Buffer* buffer{nullptr};
|
|
size_t buffer_left_size{0};
|
|
|
|
while(true) {
|
|
{
|
|
std::lock_guard block{transfer->network_buffer.mutex};
|
|
|
|
if(!transfer->network_buffer.buffer_head) {
|
|
buffer_left_size = 0;
|
|
assert(transfer->network_buffer.bytes == 0);
|
|
break;
|
|
}
|
|
|
|
buffer = ref_buffer(transfer->network_buffer.buffer_head);
|
|
buffer_left_size = transfer->network_buffer.bytes;
|
|
}
|
|
|
|
const auto max_write_bytes = transfer->networking.throttle.bytes_left();
|
|
if(!max_write_bytes) break; /* network throttle */
|
|
|
|
assert(buffer->offset < buffer->length);
|
|
auto written = ::send(fd, buffer->data + buffer->offset, std::min((size_t) (buffer->length - buffer->offset), max_write_bytes), MSG_DONTWAIT | MSG_NOSIGNAL);
|
|
if(written <= 0) {
|
|
deref_buffer(buffer);
|
|
if(errno == EAGAIN) {
|
|
transfer->add_network_write_event(false);
|
|
break;
|
|
}
|
|
|
|
if(transfer->state == FileClient::STATE_TRANSFERRING) {
|
|
assert(transfer->transfer);
|
|
|
|
if(written == 0) {
|
|
/* EOF, how the hell is this event possible?! (Read should already catch it) */
|
|
logError(LOG_FT, "{} Client disconnected unexpectedly on write. Send {} bytes out of {}.",
|
|
transfer->log_prefix(), transfer->statistics.file_transferred.total_bytes, transfer->transfer ? transfer->transfer->expected_file_size - transfer->transfer->file_offset : -1);
|
|
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::UNEXPECTED_CLIENT_DISCONNECT, "" });
|
|
} else {
|
|
logError(LOG_FT, "{} Received network write error. Send {} bytes out of {}. Closing transfer.",
|
|
transfer->log_prefix(), transfer->statistics.file_transferred.total_bytes, transfer->transfer ? transfer->transfer->expected_file_size - transfer->transfer->file_offset : -1);
|
|
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::NETWORK_IO_ERROR, strerror(errno) });
|
|
}
|
|
} else if(transfer->state == FileClient::STATE_FLUSHING && transfer->transfer) {
|
|
{
|
|
std::lock_guard block{transfer->network_buffer.mutex};
|
|
if(transfer->network_buffer.bytes == 0)
|
|
goto disconnect_client;
|
|
}
|
|
|
|
transfer->flush_network_buffer();
|
|
if(written == 0) {
|
|
logError(LOG_FT, "{} Received unexpected client disconnect while flushing the network buffer. Transfer failed.", transfer->log_prefix());
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::UNEXPECTED_CLIENT_DISCONNECT, "" });
|
|
} else {
|
|
logError(LOG_FT, "{} Received network write error while flushing the network buffer. Closing transfer.",
|
|
transfer->log_prefix());
|
|
|
|
transfer->handle->invoke_aborted_callback(client, { TransferError::NETWORK_IO_ERROR, strerror(errno) });
|
|
}
|
|
}
|
|
|
|
disconnect_client:
|
|
/* invalidate all network write operations, but still flush the disk IO buffer */
|
|
if(size_t bytes_dropped{transfer->flush_network_buffer()}; bytes_dropped > 0) {
|
|
if(transfer->state != FileClient::STATE_TRANSFERRING) {
|
|
logWarning(LOG_FT, "{} Dropped {} bytes due to a write error ({}/{})",
|
|
transfer->log_prefix(), bytes_dropped, errno, strerror(errno));
|
|
}
|
|
}
|
|
|
|
std::unique_lock slock{transfer->state_mutex};
|
|
/* no need to flush anything here, write will only be invoked on a client download */
|
|
transfer->handle->disconnect_client(client, slock, false);
|
|
return;
|
|
} else {
|
|
buffer->offset += written;
|
|
assert(buffer->offset <= buffer->length);
|
|
if(buffer->length == buffer->offset) {
|
|
{
|
|
std::lock_guard block{transfer->network_buffer.mutex};
|
|
if(transfer->network_buffer.buffer_head == buffer) {
|
|
transfer->network_buffer.buffer_head = buffer->next;
|
|
if(!buffer->next) {
|
|
transfer->network_buffer.buffer_tail = &transfer->network_buffer.buffer_head;
|
|
}
|
|
|
|
assert(transfer->network_buffer.bytes >= written);
|
|
transfer->network_buffer.bytes -= written;
|
|
buffer_left_size = transfer->network_buffer.bytes;
|
|
|
|
/* Will not trigger a memory free since we're still holding onto one reference */
|
|
deref_buffer(buffer);
|
|
} else {
|
|
/* the buffer got remove */
|
|
}
|
|
}
|
|
} else {
|
|
std::lock_guard block{transfer->network_buffer.mutex};
|
|
if(transfer->network_buffer.buffer_head == buffer) {
|
|
assert(transfer->network_buffer.bytes >= written);
|
|
transfer->network_buffer.bytes -= written;
|
|
buffer_left_size = transfer->network_buffer.bytes;
|
|
} else {
|
|
/* the buffer got removed */
|
|
}
|
|
}
|
|
|
|
transfer->timings.last_write = std::chrono::system_clock::now();
|
|
transfer->statistics.network_send.increase_bytes(written);
|
|
|
|
deref_buffer(buffer);
|
|
|
|
if(transfer->networking.throttle.increase_bytes(written)) {
|
|
break; /* we've to slow down */
|
|
}
|
|
}
|
|
}
|
|
|
|
if(buffer_left_size > 0) {
|
|
transfer->add_network_write_event(false);
|
|
} else if(transfer->state == FileClient::STATE_FLUSHING) {
|
|
transfer->handle->test_disconnecting_state(client);
|
|
|
|
if(!std::exchange(transfer->finished_signal_send, true)) {
|
|
if(transfer->transfer && transfer->statistics.file_transferred.total_bytes + transfer->transfer->file_offset == transfer->transfer->expected_file_size) {
|
|
logMessage(LOG_FT, "{} Finished file transfer within {}. Closing connection.", transfer->log_prefix(), duration_to_string(std::chrono::system_clock::now() - transfer->timings.key_received));
|
|
transfer->handle->report_transfer_statistics(client);
|
|
if(auto callback{transfer->handle->callback_transfer_finished}; callback)
|
|
callback(transfer->transfer);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
transfer->handle->enqueue_disk_io(client);
|
|
}
|
|
}
|
|
|
|
inline std::string transfer_key_to_string(char key[TRANSFER_KEY_LENGTH]) {
|
|
std::string result{};
|
|
result.resize(TRANSFER_KEY_LENGTH);
|
|
|
|
for(size_t index{0}; index < TRANSFER_KEY_LENGTH; index++)
|
|
result[index] = isprint(key[index]) ? key[index] : '.';
|
|
|
|
return result;
|
|
}
|
|
|
|
size_t LocalFileTransfer::handle_transfer_read_raw(const std::shared_ptr<FileClient> &client, const char *buffer, size_t length) {
|
|
if(client->networking.protocol == FileClient::PROTOCOL_TS_V1) {
|
|
return this->handle_transfer_read(client, buffer, length);
|
|
} else if(client->networking.protocol == FileClient::PROTOCOL_HTTPS) {
|
|
client->networking.pipe_ssl.process_incoming_data(pipes::buffer_view{buffer, length});
|
|
return client->network_buffer.bytes;
|
|
} else if(client->networking.protocol != FileClient::PROTOCOL_UNKNOWN) {
|
|
assert(false);
|
|
logWarning(LOG_FT, "{} Read bytes with unknown protocol. Closing connection.", client->log_prefix());
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return (size_t) -1;
|
|
}
|
|
|
|
if(client->state != FileClient::STATE_AWAITING_KEY) {
|
|
logWarning(LOG_FT, "{} Read bytes with unknown protocol but having not awaiting key state. Closing connection.", client->log_prefix());
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return (size_t) -1;
|
|
}
|
|
|
|
/* lets read the key bytes (16) and then decide */
|
|
if(client->transfer_key.provided_bytes < TRANSFER_KEY_LENGTH) {
|
|
const auto bytes_write = std::min(TRANSFER_KEY_LENGTH - client->transfer_key.provided_bytes, length);
|
|
memcpy(client->transfer_key.key + client->transfer_key.provided_bytes, buffer, bytes_write);
|
|
length -= bytes_write;
|
|
buffer += bytes_write;
|
|
client->transfer_key.provided_bytes += bytes_write;
|
|
}
|
|
|
|
if(client->transfer_key.provided_bytes < TRANSFER_KEY_LENGTH) {
|
|
return 0; /* we need more data */
|
|
}
|
|
|
|
if(pipes::SSL::is_ssl((uint8_t*) client->transfer_key.key, client->transfer_key.provided_bytes)) {
|
|
client->networking.protocol = FileClient::PROTOCOL_HTTPS;
|
|
client->networking.http_header_buffer.reset(allocate_buffer(MAX_HTTP_HEADER_SIZE)); /* max 8k header */
|
|
client->networking.max_read_buffer_size = (size_t) MAX_HTTP_HEADER_SIZE; /* HTTP-Header are sometimes a bit bigger. Dont cap max bandwidth here. */
|
|
debugMessage(LOG_FT, "{} Using protocol HTTPS for file transfer.", client->log_prefix());
|
|
|
|
char first_bytes[TRANSFER_KEY_LENGTH];
|
|
memcpy(first_bytes, client->transfer_key.key, TRANSFER_KEY_LENGTH);
|
|
client->transfer_key.provided_bytes = 0;
|
|
|
|
if(!this->initialize_client_ssl(client)) {
|
|
return (size_t) -1;
|
|
}
|
|
|
|
client->networking.pipe_ssl.process_incoming_data(pipes::buffer_view{first_bytes, TRANSFER_KEY_LENGTH});
|
|
if(length > 0) {
|
|
client->networking.pipe_ssl.process_incoming_data(pipes::buffer_view{buffer, length});
|
|
}
|
|
return client->network_buffer.bytes;
|
|
} else {
|
|
client->networking.protocol = FileClient::PROTOCOL_TS_V1;
|
|
debugMessage(LOG_FT, "{} Using protocol RAWv1 for file transfer.", client->log_prefix());
|
|
|
|
std::string error_detail{};
|
|
auto key_result = this->handle_transfer_key_provided(client, error_detail);
|
|
switch(key_result) {
|
|
case TransferKeyApplyResult::SUCCESS:
|
|
if(client->transfer->direction == Transfer::DIRECTION_DOWNLOAD) {
|
|
logMessage(LOG_FT, "{} Successfully initialized file download for file {}.", client->log_prefix(), client->transfer->absolute_file_path);
|
|
this->enqueue_disk_io(client); /* we've to take initiative */
|
|
} else {
|
|
logMessage(LOG_FT, "{} Successfully initialized file upload to file {}.", client->log_prefix(), client->transfer->absolute_file_path);
|
|
}
|
|
|
|
return length ? this->handle_transfer_read(client, buffer, length) : 0;
|
|
|
|
case TransferKeyApplyResult::UNKNOWN_KEY:
|
|
logMessage(LOG_FT, "{} Disconnecting client because we don't recognise his key ({}).", client->log_prefix(), transfer_key_to_string(client->transfer_key.key));
|
|
break;
|
|
|
|
case TransferKeyApplyResult::FILE_ERROR:
|
|
assert(client->transfer);
|
|
this->invoke_aborted_callback(client, { TransferError::DISK_INITIALIZE_ERROR, error_detail });
|
|
|
|
logMessage(LOG_FT, "{} Disconnecting client because we failed to open the target file.", client->log_prefix());
|
|
break;
|
|
|
|
case TransferKeyApplyResult::INTERNAL_ERROR:
|
|
default:
|
|
this->invoke_aborted_callback(client, { TransferError::UNKNOWN, error_detail });
|
|
logMessage(LOG_FT, "{} Disconnecting client because of an unknown key initialize error ({}).", client->log_prefix(), (int) key_result);
|
|
break;
|
|
}
|
|
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return (size_t) -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t LocalFileTransfer::handle_transfer_read(const std::shared_ptr<FileClient> &client, const char *buffer, size_t length) {
|
|
if(client->state == FileClient::STATE_AWAITING_KEY) {
|
|
if(client->networking.protocol == FileClient::PROTOCOL_HTTPS) {
|
|
assert(client->networking.http_header_buffer);
|
|
auto header_buffer = &*client->networking.http_header_buffer;
|
|
|
|
http::HttpResponse response{};
|
|
size_t overhead_length{0};
|
|
char* overhead_data_ptr{nullptr};
|
|
|
|
if(header_buffer->offset + length > header_buffer->capacity) {
|
|
logMessage(LOG_FT, "{} Closing connection due to an too long HTTP(S) header (over {} bytes)", client->log_prefix(), header_buffer->capacity);
|
|
response.code = http::code::code(413, "Entity Too Large");
|
|
response.setHeader("x-error-message", { "header exceeds max size of " + std::to_string(header_buffer->capacity) });
|
|
goto send_response_exit;
|
|
}
|
|
|
|
{
|
|
http::HttpRequest request{};
|
|
|
|
const auto old_offset = header_buffer->offset;
|
|
memcpy(header_buffer->data + header_buffer->offset, buffer, length);
|
|
header_buffer->offset += length;
|
|
|
|
constexpr static std::string_view header_end_token{"\r\n\r\n"};
|
|
auto header_view = std::string_view{header_buffer->data, header_buffer->offset};
|
|
auto header_end = header_view.find(header_end_token, old_offset > 3 ? old_offset - 3 : 0);
|
|
if(header_end == std::string::npos) return 0;
|
|
|
|
debugMessage(LOG_FT, "{} Received clients HTTP header.", client->log_prefix());
|
|
if(!http::parse_request(std::string{header_view.data(), header_end}, request)) {
|
|
logError(LOG_FT, "{} Failed to parse HTTP request. Disconnecting client.", client->log_prefix());
|
|
|
|
response.code = http::code::code(400, "Bad Request");
|
|
response.setHeader("x-error-message", { "failed to parse http request" });
|
|
goto send_response_exit;
|
|
}
|
|
|
|
if(auto header = request.findHeader("Sec-Fetch-Mode"); request.method == "OPTIONS") {
|
|
logMessage(0, "{} Received options request (probably due to cors). Sending allow response and disconnecting client.", client->log_prefix());
|
|
response.code = http::code::_200;
|
|
goto send_response_exit;
|
|
}
|
|
|
|
#if 0
|
|
std::map<std::string, std::string> query{};
|
|
if(!http::parse_url_parameters(request.url, query)) {
|
|
logMessage(0, "{} Received request but missing URL parameters ({})", client->log_prefix(), request.url);
|
|
response.code = http::code::code(400, "Bad Request");
|
|
goto send_response_exit;
|
|
}
|
|
#endif
|
|
|
|
std::string transfer_key{};
|
|
if(request.parameters.count("transfer-key") == 0 || (transfer_key = request.parameters.at("transfer-key")).empty()) {
|
|
logMessage(0, "{} Missing transfer key parameter. Disconnecting client.", client->log_prefix());
|
|
response.code = http::code::code(400, "Bad Request");
|
|
response.setHeader("x-error-message", { "missing transfer key" });
|
|
goto send_response_exit;
|
|
}
|
|
|
|
if(transfer_key.length() != TRANSFER_KEY_LENGTH) {
|
|
logMessage(0, "{} Received too short/long transfer key. Expected {} but received {}. Disconnecting client.", client->log_prefix(), TRANSFER_KEY_LENGTH, transfer_key.length());
|
|
response.code = http::code::code(400, "Bad Request");
|
|
response.setHeader("x-error-message", { "key too short/long" });
|
|
goto send_response_exit;
|
|
}
|
|
client->transfer_key.provided_bytes = TRANSFER_KEY_LENGTH;
|
|
memcpy(client->transfer_key.key, transfer_key.data(), TRANSFER_KEY_LENGTH);
|
|
|
|
client->file.query_media_bytes = true;
|
|
|
|
std::string error_detail{};
|
|
auto key_result = this->handle_transfer_key_provided(client, error_detail);
|
|
switch(key_result) {
|
|
case TransferKeyApplyResult::SUCCESS:
|
|
if(client->transfer->direction == Transfer::DIRECTION_DOWNLOAD) {
|
|
logMessage(LOG_FT, "{} Successfully initialized file download for file {}.", client->log_prefix(), client->transfer->absolute_file_path);
|
|
} else {
|
|
logMessage(LOG_FT, "{} Successfully upload file download to file {}.", client->log_prefix(), client->transfer->absolute_file_path);
|
|
}
|
|
break;
|
|
|
|
case TransferKeyApplyResult::FILE_ERROR:
|
|
assert(client->transfer);
|
|
|
|
this->invoke_aborted_callback(client, { TransferError::DISK_INITIALIZE_ERROR, error_detail });
|
|
logMessage(LOG_FT, "{} Disconnecting client because we failed to open the target file.", client->log_prefix());
|
|
response.code = http::code::code(500, "Internal Server Error");
|
|
response.setHeader("x-error-message", { error_detail });
|
|
goto send_response_exit;
|
|
|
|
case TransferKeyApplyResult::UNKNOWN_KEY:
|
|
logMessage(LOG_FT, "{} Disconnecting client because we don't recognise his key ({}).", client->log_prefix(), transfer_key_to_string(client->transfer_key.key));
|
|
response.code = http::code::code(406, "Not Acceptable");
|
|
response.setHeader("x-error-message", { "unknown key" });
|
|
goto send_response_exit;
|
|
|
|
case TransferKeyApplyResult::INTERNAL_ERROR:
|
|
default:
|
|
this->invoke_aborted_callback(client, { TransferError::UNKNOWN, error_detail });
|
|
logMessage(LOG_FT, "{} Disconnecting client because of an unknown key initialize error ({}).", client->log_prefix(), (int) key_result);
|
|
response.code = http::code::code(500, "Internal Server Error");
|
|
response.setHeader("x-error-message", { error_detail.empty() ? "failed to initialize transfer" : error_detail });
|
|
goto send_response_exit;
|
|
}
|
|
|
|
response.code = http::code::_200;
|
|
if(client->transfer->direction == Transfer::DIRECTION_DOWNLOAD) {
|
|
const auto download_name = request.findHeader("download-name");
|
|
response.setHeader("Content-Length", { std::to_string(client->transfer->expected_file_size - client->transfer->file_offset) });
|
|
|
|
response.setHeader("Content-type", {"application/octet-stream; "});
|
|
response.setHeader("Content-Transfer-Encoding", {"binary"});
|
|
|
|
response.setHeader("Content-Disposition", {
|
|
"attachment; filename=\"" + http::encode_url(request.parameters.count("download-name") > 0 ? request.parameters.at("download-name") : client->transfer->file_name) + "\""
|
|
});
|
|
|
|
response.setHeader("X-media-bytes", { base64::encode((char*) client->file.media_bytes, client->file.media_bytes_length) });
|
|
client->networking.http_state = FileClient::HTTP_STATE_DOWNLOADING;
|
|
goto send_response_exit;
|
|
} else {
|
|
/* we're sending a HTTP response later */
|
|
client->networking.http_state = FileClient::HTTP_STATE_AWAITING_BOUNDARY;
|
|
goto initialize_exit;
|
|
}
|
|
|
|
overhead_length = header_buffer->offset - header_end - header_end_token.length();
|
|
overhead_data_ptr = header_buffer->data + header_end + header_end_token.length();
|
|
}
|
|
|
|
send_response_exit:
|
|
this->send_http_response(client, response);
|
|
if(response.code->code != 200 || !client->transfer) {
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return (size_t) -1;
|
|
}
|
|
|
|
initialize_exit:
|
|
if(client->transfer->direction == Transfer::DIRECTION_DOWNLOAD)
|
|
this->enqueue_disk_io(client); /* we've to take initiative */
|
|
|
|
header_buffer->offset = 0;
|
|
return overhead_length == 0 ? 0 : this->handle_transfer_read(client, overhead_data_ptr, overhead_length);
|
|
} else {
|
|
logError(LOG_FT, "{} Protocol variable contains invalid protocol for awaiting key state. Disconnecting client.", client->log_prefix());
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return (size_t) -1;
|
|
}
|
|
} else if(client->state == FileClient::STATE_TRANSFERRING) {
|
|
assert(client->transfer);
|
|
if(client->transfer->direction != Transfer::DIRECTION_UPLOAD) {
|
|
debugMessage(LOG_FT, "{} Read {} bytes from client even though we're only sending a file. Ignoring it.", client->log_prefix(), length);
|
|
return 0;
|
|
}
|
|
|
|
if(client->networking.protocol == FileClient::PROTOCOL_HTTPS) {
|
|
std::string error_message{};
|
|
const auto upload_result = client->handle->handle_transfer_upload_http(client, buffer, length);
|
|
switch(upload_result) {
|
|
case TransferUploadHTTPResult::FINISH: {
|
|
assert(!client->finished_signal_send); /* we should be faster than the networking flush */
|
|
client->finished_signal_send = true;
|
|
logMessage(LOG_FT, "{} File upload has been completed in {}. Disconnecting client.", client->log_prefix(), duration_to_string(std::chrono::system_clock::now() - client->timings.key_received));
|
|
|
|
this->report_transfer_statistics(client);
|
|
if(auto callback{this->callback_transfer_finished}; callback)
|
|
callback(client->transfer);
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return client->network_buffer.bytes; /* a bit unexact but the best we could get away with it */
|
|
}
|
|
|
|
case TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE:
|
|
return client->network_buffer.bytes; /* a bit unexact but the best we could get away with it */
|
|
|
|
case TransferUploadHTTPResult::MISSING_CONTENT_TYPE:
|
|
logMessage(LOG_FT, "{} Missing boundary content type. Disconnecting client.", client->log_prefix());
|
|
error_message = "invalid boundary content type";
|
|
break;
|
|
|
|
case TransferUploadHTTPResult::INVALID_CONTENT_TYPE:
|
|
logMessage(LOG_FT, "{} Invalid boundary content type. Disconnecting client.", client->log_prefix());
|
|
error_message = "missing boundary content type";
|
|
break;
|
|
|
|
case TransferUploadHTTPResult::BOUNDARY_MISSING:
|
|
logMessage(LOG_FT, "{} Missing boundary token. Disconnecting client.", client->log_prefix());
|
|
error_message = "missing boundary token";
|
|
break;
|
|
|
|
case TransferUploadHTTPResult::BOUNDARY_INVALID:
|
|
logMessage(LOG_FT, "{} Invalid boundary. Disconnecting client.", client->log_prefix());
|
|
error_message = "invalid boundary";
|
|
break;
|
|
|
|
case TransferUploadHTTPResult::BOUNDARY_TOKEN_INVALID:
|
|
logMessage(LOG_FT, "{} Invalid boundary token. Disconnecting client.", client->log_prefix());
|
|
error_message = "invalid boundary token";
|
|
break;
|
|
}
|
|
|
|
http::HttpResponse response{};
|
|
|
|
response.code = http::code::code(510, "Not Extended");
|
|
response.setHeader("x-error-message", { error_message });
|
|
client->handle->send_http_response(client, response);
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
|
|
return (size_t) -1;
|
|
} else if(client->networking.protocol == FileClient::PROTOCOL_TS_V1) {
|
|
size_t written_bytes{0};
|
|
auto result = this->handle_transfer_upload_raw(client, buffer, length, &written_bytes);
|
|
|
|
switch (result) {
|
|
case TransferUploadRawResult::FINISH_OVERFLOW:
|
|
case TransferUploadRawResult::FINISH: {
|
|
assert(!client->finished_signal_send); /* we should be faster than the networking flush */
|
|
client->finished_signal_send = true;
|
|
if(result == TransferUploadRawResult::FINISH_OVERFLOW)
|
|
logMessage(LOG_FT, "{} Client send {} too many bytes (Transfer length was {}). Dropping them, flushing the disk IO and closing the transfer.", client->log_prefix(), length - written_bytes, duration_to_string(std::chrono::system_clock::now() - client->timings.key_received));
|
|
else
|
|
logMessage(LOG_FT, "{} File upload has been completed in {}. Flushing disk IO and closing the connection.", client->log_prefix(), duration_to_string(std::chrono::system_clock::now() - client->timings.key_received));
|
|
this->report_transfer_statistics(client);
|
|
if(auto callback{this->callback_transfer_finished}; callback)
|
|
callback(client->transfer);
|
|
|
|
std::unique_lock slock{client->state_mutex};
|
|
client->handle->disconnect_client(client, slock, true);
|
|
return (size_t) -1;
|
|
}
|
|
|
|
case TransferUploadRawResult::MORE_DATA_TO_RECEIVE:
|
|
return client->network_buffer.bytes; /* a bit unexact but the best we could get away with it */
|
|
}
|
|
} else {
|
|
logWarning(LOG_FT, "{} Read message for client with unknown protocol. Dropping {} bytes.", client->log_prefix(), length);
|
|
return 0;
|
|
}
|
|
} else {
|
|
logWarning(LOG_FT, "{} Read message at invalid client state ({}). Dropping message.", client->log_prefix(), client->state);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
TransferKeyApplyResult LocalFileTransfer::handle_transfer_key_provided(const std::shared_ptr<FileClient> &client, std::string& error_detail) {
|
|
{
|
|
std::lock_guard tlock{this->transfers_mutex};
|
|
for(auto it = this->pending_transfers.begin(); it != this->pending_transfers.end(); it++) {
|
|
if(memcmp((*it)->transfer_key.data(), client->transfer_key.key, std::min((size_t) TRANSFER_KEY_LENGTH, (*it)->transfer_key.length())) == 0) {
|
|
client->transfer = *it;
|
|
this->pending_transfers.erase(it);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(!client->transfer) {
|
|
return TransferKeyApplyResult::UNKNOWN_KEY;
|
|
}
|
|
|
|
if(client->transfer->direction == Transfer::DIRECTION_UPLOAD) {
|
|
auto server = dynamic_pointer_cast<LocalVirtualFileServer>(client->transfer->server);
|
|
assert(server);
|
|
client->networking.throttle.right = &server->upload_throttle;
|
|
} else if(client->transfer->direction == Transfer::DIRECTION_DOWNLOAD) {
|
|
auto server = dynamic_pointer_cast<LocalVirtualFileServer>(client->transfer->server);
|
|
assert(server);
|
|
client->networking.throttle.right = &server->download_throttle;
|
|
}
|
|
|
|
if(client->transfer->max_bandwidth > 0) {
|
|
debugMessage(LOG_FT, "{} Limit network bandwidth especially for the client to {} bytes/second", client->log_prefix(), client->transfer->max_bandwidth);
|
|
client->networking.client_throttle.set_max_bandwidth(client->transfer->max_bandwidth);
|
|
}
|
|
client->networking.max_read_buffer_size = (size_t) -1; /* limit max bandwidth via throttle */
|
|
|
|
auto io_init_result = this->initialize_file_io(client);
|
|
if(io_init_result != FileInitializeResult::SUCCESS) {
|
|
logMessage(LOG_FT, "{} Failed to initialize file {}: {}/{}. Disconnecting client.",
|
|
client->log_prefix(), client->transfer->direction == Transfer::DIRECTION_UPLOAD ? "writer" : "reader", (int) io_init_result, kFileInitializeResultMessages[(int) io_init_result]);
|
|
error_detail = std::to_string((int) io_init_result) + "/" + std::string{kFileInitializeResultMessages[(int) io_init_result]};
|
|
return TransferKeyApplyResult::FILE_ERROR;
|
|
}
|
|
|
|
{
|
|
std::unique_lock slock{client->state_mutex};
|
|
if(client->state != FileClient::STATE_AWAITING_KEY) {
|
|
return TransferKeyApplyResult::SUCCESS; /* something disconnected the client */
|
|
}
|
|
|
|
client->state = FileClient::STATE_TRANSFERRING;
|
|
}
|
|
|
|
if(auto callback{this->callback_transfer_started}; callback) {
|
|
callback(client->transfer);
|
|
}
|
|
|
|
client->timings.key_received = std::chrono::system_clock::now();
|
|
return TransferKeyApplyResult::SUCCESS;
|
|
}
|
|
|
|
TransferUploadRawResult LocalFileTransfer::handle_transfer_upload_raw(const std::shared_ptr<FileClient> &client, const char *buffer, size_t length, size_t* bytesWritten) {
|
|
auto write_length = length;
|
|
auto write_offset = client->statistics.file_transferred.total_bytes + client->transfer->file_offset;
|
|
TransferUploadRawResult result{TransferUploadRawResult::MORE_DATA_TO_RECEIVE};
|
|
|
|
if(write_offset + write_length > client->transfer->expected_file_size) {
|
|
result = TransferUploadRawResult::FINISH_OVERFLOW;
|
|
write_length = client->transfer->expected_file_size - write_offset;
|
|
} else if(write_offset + write_length == client->transfer->expected_file_size) {
|
|
result = TransferUploadRawResult::FINISH;
|
|
}
|
|
|
|
client->statistics.file_transferred.increase_bytes(write_length);
|
|
client->enqueue_disk_buffer_bytes(buffer, write_length);
|
|
this->enqueue_disk_io(client);
|
|
if(bytesWritten) {
|
|
*bytesWritten = write_length;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
//Example boundary:
|
|
//------WebKitFormBoundaryaWP8XAzMBnMOJznv\r\nContent-Disposition: form-data; name="file"; filename="blob"\r\nContent-Type: application/octet-stream\r\n\r\n
|
|
TransferUploadHTTPResult LocalFileTransfer::handle_transfer_upload_http(const std::shared_ptr<FileClient> &client,
|
|
const char *buffer, size_t length) {
|
|
constexpr static std::string_view boundary_end_token{"\r\n\r\n"};
|
|
constexpr static std::string_view boundary_token_end_token{"\r\n"};
|
|
|
|
if(client->networking.http_state == FileClient::HTTP_STATE_AWAITING_BOUNDARY) {
|
|
assert(client->networking.http_header_buffer);
|
|
|
|
/* Notice: The buffer ptr might be some data within our header buffer! But since its somewhere in the back its okey */
|
|
auto boundary_buffer = &*client->networking.http_header_buffer;
|
|
if(boundary_buffer->offset + length > boundary_buffer->capacity)
|
|
return TransferUploadHTTPResult::BOUNDARY_MISSING;
|
|
|
|
const auto old_offset = boundary_buffer->offset;
|
|
memcpy(boundary_buffer->data + boundary_buffer->offset, buffer, length);
|
|
boundary_buffer->offset += length;
|
|
|
|
auto buffer_view = std::string_view{boundary_buffer->data, boundary_buffer->offset};
|
|
auto boundary_end = buffer_view.find(boundary_end_token, old_offset > 3 ? old_offset - 3 : 0);
|
|
if(boundary_end == std::string::npos)
|
|
return TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE;
|
|
|
|
auto boundary_token_end = buffer_view.find(boundary_token_end_token);
|
|
if(boundary_token_end + boundary_token_end_token.size() >= boundary_end)
|
|
return TransferUploadHTTPResult::BOUNDARY_TOKEN_INVALID;
|
|
|
|
const auto boundary_token = buffer_view.substr(0, boundary_token_end);
|
|
client->networking.http_boundary = boundary_token;
|
|
logTrace(LOG_FT, "{} Received clients HTTP file boundary ({}).", client->log_prefix(), boundary_token);
|
|
|
|
const auto boundary_header_offset = boundary_token_end + boundary_token_end_token.size();
|
|
const auto boundary_payload = buffer_view.substr(boundary_header_offset, boundary_end - boundary_header_offset);
|
|
|
|
http::HttpRequest boundary{};
|
|
if(!http::parse_request(std::string{boundary_payload}, boundary))
|
|
return TransferUploadHTTPResult::BOUNDARY_INVALID;
|
|
|
|
const auto content_type = boundary.findHeader("Content-Type");
|
|
if(!content_type || content_type.values.empty())
|
|
return TransferUploadHTTPResult::MISSING_CONTENT_TYPE;
|
|
/* A bit relaxed here
|
|
else if(content_type.values[0] != "application/octet-stream")
|
|
return TransferUploadHTTPResult::INVALID_CONTENT_TYPE;
|
|
*/
|
|
|
|
const auto overhead_length = boundary_buffer->offset - boundary_end - boundary_end_token.length();
|
|
const auto overhead_data_ptr = boundary_buffer->data + boundary_end + boundary_end_token.length();
|
|
|
|
client->networking.http_state = FileClient::HTTP_STATE_UPLOADING;
|
|
boundary_buffer->offset = 0;
|
|
return overhead_length == 0 ? TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE : this->handle_transfer_upload_http(client, overhead_data_ptr, overhead_length);
|
|
} else if(client->networking.http_state == FileClient::HTTP_STATE_UPLOADING) {
|
|
size_t bytes_written{0};
|
|
auto result = this->handle_transfer_upload_raw(client, buffer, length, &bytes_written);
|
|
switch(result) {
|
|
case TransferUploadRawResult::MORE_DATA_TO_RECEIVE:
|
|
return TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE;
|
|
|
|
case TransferUploadRawResult::FINISH_OVERFLOW:
|
|
case TransferUploadRawResult::FINISH:
|
|
debugMessage(LOG_FT, "{} File upload has been completed in {}. Awaiting file end boundary.", client->log_prefix(), duration_to_string(std::chrono::system_clock::now() - client->timings.key_received));
|
|
client->networking.http_state = FileClient::HTTP_STATE_AWAITING_BOUNDARY_END;
|
|
|
|
if(length != bytes_written)
|
|
return this->handle_transfer_upload_http(client, buffer + bytes_written, length - bytes_written);
|
|
return TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE;
|
|
|
|
default:
|
|
assert(false);
|
|
return TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE;
|
|
}
|
|
} else if(client->networking.http_state == FileClient::HTTP_STATE_AWAITING_BOUNDARY_END) {
|
|
assert(client->networking.http_header_buffer);
|
|
|
|
/* Notice: The buffer ptr might be some data within our header buffer! But since its somewhere in the back its okey */
|
|
auto boundary_buffer = &*client->networking.http_header_buffer;
|
|
if(boundary_buffer->offset + length > boundary_buffer->capacity)
|
|
return TransferUploadHTTPResult::BOUNDARY_MISSING;
|
|
|
|
memcpy(boundary_buffer->data + boundary_buffer->offset, buffer, length);
|
|
boundary_buffer->offset += length;
|
|
|
|
const auto expected_boundary_size = 2 + client->networking.http_boundary.size() + 4;
|
|
if(boundary_buffer->offset < expected_boundary_size)
|
|
return TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE;
|
|
|
|
if(memcmp(boundary_buffer->data, "\r\n", 2) != 0) {
|
|
debugMessage(LOG_FT, "{} File boundary seems invalid/miss matching. Expected \\r\\n at {}.", client->log_prefix(), 0);
|
|
goto callback_exit;
|
|
}
|
|
|
|
if(memcmp(boundary_buffer->data + 2 + client->networking.http_boundary.size(), "--\r\n", 4) != 0) {
|
|
debugMessage(LOG_FT, "{} File boundary seems invalid/miss matching. Expected --\\r\\n at {}.", client->log_prefix(), 2 + client->networking.http_boundary.size());
|
|
goto callback_exit;
|
|
}
|
|
|
|
if(memcmp(boundary_buffer->data + 2, client->networking.http_boundary.data(), client->networking.http_boundary.size()) != 0) {
|
|
debugMessage(LOG_FT, "{} File upload has been completed but end boundary does not match ({} != {})! Ignoring miss match and finishing transfer", client->log_prefix(),
|
|
std::string_view{boundary_buffer->data + 2, client->networking.http_boundary.size()},
|
|
client->networking.http_boundary
|
|
);
|
|
|
|
goto callback_exit;
|
|
}
|
|
|
|
if(boundary_buffer->offset > expected_boundary_size) {
|
|
debugMessage(LOG_FT, "{} File boundary has been received, but received {} more unexpected bytes. Ignoring these and finishing the upload.",
|
|
client->log_prefix(), boundary_buffer->offset - expected_boundary_size);
|
|
} else {
|
|
debugMessage(LOG_FT, "{} File boundary has been received.", client->log_prefix());
|
|
}
|
|
|
|
callback_exit:
|
|
/* send a proper HTTP response */
|
|
{
|
|
http::HttpResponse response{};
|
|
response.code = http::code::_200;
|
|
this->send_http_response(client, response);
|
|
};
|
|
return TransferUploadHTTPResult::FINISH;
|
|
} else {
|
|
logWarning(0, "{} Received HTTP(S) data, for an invalid HTTP state ({}).", client->log_prefix(), (int) client->networking.http_state);
|
|
return TransferUploadHTTPResult::MORE_DATA_TO_RECEIVE;
|
|
}
|
|
}
|
|
|
|
inline void apply_cors_and_connection_headers(http::HttpResponse &response) {
|
|
response.setHeader("Connection", {"close"}); /* close the connection instance, we dont want multiple requests */
|
|
response.setHeader("Access-Control-Allow-Methods", {"GET, POST"});
|
|
response.setHeader("Access-Control-Allow-Origin", {"*"});
|
|
|
|
auto requestHeaders = response.findHeader("Access-Control-Request-Headers").values;
|
|
if(requestHeaders.empty()) {
|
|
requestHeaders.emplace_back("*");
|
|
}
|
|
response.setHeader("Access-Control-Allow-Headers", requestHeaders); //access-control-allow-headers
|
|
response.setHeader("Access-Control-Max-Age", {"86400"});
|
|
}
|
|
|
|
void LocalFileTransfer::send_http_response(const std::shared_ptr<FileClient> &client, http::HttpResponse &response) {
|
|
apply_cors_and_connection_headers(response);
|
|
response.setHeader("Access-Control-Expose-Headers", {"*, x-error-message, Content-Length, X-media-bytes, Content-Disposition"});
|
|
|
|
const auto payload = response.build();
|
|
client->send_file_bytes(payload.data(), payload.length());
|
|
} |