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libreoffice-online/net/Socket.cpp
Ashod Nakashian 71f4597059 wsd: WebSocket state is a property of the socket 
This resolves the erroneous warnings of pinging
on a non-upgraded (i.e. HTTP) socket.

This was due to the fact that we moved the socket
from one SocketHandlerInterface to a WebSocketHandler
after upgrading and since the WSState was a property
of the handler, the WebSocketHandler didn't know
that the socket had already been upgraded.

Also other cosmetics and cleanups.

Change-Id: I1a88edef750117ed551d23245e49380371561422
Reviewed-on: https://gerrit.libreoffice.org/49911
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>
Tested-by: Ashod Nakashian <ashnakash@gmail.com>
2018-02-23 16:42:22 +01:00

345 lines
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <config.h>
#include <stdio.h>
#include <ctype.h>
#include <iomanip>
#include <zlib.h>
#include <Poco/DateTime.h>
#include <Poco/DateTimeFormat.h>
#include <Poco/DateTimeFormatter.h>
#include <Poco/Net/HTTPResponse.h>
#include <SigUtil.hpp>
#include "Socket.hpp"
#include "ServerSocket.hpp"
#include "WebSocketHandler.hpp"
int SocketPoll::DefaultPollTimeoutMs = 5000;
std::atomic<bool> SocketPoll::InhibitThreadChecks(false);
std::atomic<bool> Socket::InhibitThreadChecks(false);
int Socket::createSocket(Socket::Type type)
{
int domain = type == Type::IPv4 ? AF_INET : AF_INET6;
return socket(domain, SOCK_STREAM | SOCK_NONBLOCK, 0);
}
// help with initialization order
namespace {
std::vector<int> &getWakeupsArray()
{
static std::vector<int> pollWakeups;
return pollWakeups;
}
std::mutex &getPollWakeupsMutex()
{
static std::mutex pollWakeupsMutex;
return pollWakeupsMutex;
}
}
SocketPoll::SocketPoll(const std::string& threadName)
: _name(threadName),
_stop(false),
_threadStarted(false),
_threadFinished(false),
_owner(std::this_thread::get_id())
{
// Create the wakeup fd.
if (::pipe2(_wakeup, O_CLOEXEC | O_NONBLOCK) == -1)
{
throw std::runtime_error("Failed to allocate pipe for SocketPoll [" + threadName + "] waking.");
}
std::lock_guard<std::mutex> lock(getPollWakeupsMutex());
getWakeupsArray().push_back(_wakeup[1]);
}
SocketPoll::~SocketPoll()
{
joinThread();
{
std::lock_guard<std::mutex> lock(getPollWakeupsMutex());
auto it = std::find(getWakeupsArray().begin(),
getWakeupsArray().end(),
_wakeup[1]);
if (it != getWakeupsArray().end())
getWakeupsArray().erase(it);
}
::close(_wakeup[0]);
::close(_wakeup[1]);
_wakeup[0] = -1;
_wakeup[1] = -1;
}
void SocketPoll::startThread()
{
if (!_threadStarted)
{
_threadStarted = true;
try
{
_thread = std::thread(&SocketPoll::pollingThreadEntry, this);
}
catch (const std::exception& exc)
{
LOG_ERR("Failed to start poll thread: " << exc.what());
_threadStarted = false;
}
}
}
void SocketPoll::joinThread()
{
addCallback([this](){ removeSockets(); });
stop();
if (_threadStarted && _thread.joinable())
{
if (_thread.get_id() == std::this_thread::get_id())
LOG_ERR("DEADLOCK PREVENTED: joining own thread!");
else
{
_thread.join();
_threadStarted = false;
}
}
}
void SocketPoll::wakeupWorld()
{
for (const auto& fd : getWakeupsArray())
wakeup(fd);
}
void ServerSocket::dumpState(std::ostream& os)
{
os << "\t" << getFD() << "\t<accept>\n";
}
void SocketDisposition::execute()
{
// We should have hard ownership of this socket.
assert(_socket->getThreadOwner() == std::this_thread::get_id());
if (_socketMove)
{
// Drop pretentions of ownership before _socketMove.
_socket->setThreadOwner(std::thread::id(0));
_socketMove(_socket);
}
_socketMove = nullptr;
}
void WebSocketHandler::dumpState(std::ostream& os)
{
os << (_shuttingDown ? "shutd " : "alive ")
<< std::setw(5) << _pingTimeUs/1000. << "ms ";
if (_wsPayload.size() > 0)
Util::dumpHex(os, "\t\tws queued payload:\n", "\t\t", _wsPayload);
os << "\n";
}
void StreamSocket::dumpState(std::ostream& os)
{
int timeoutMaxMs = SocketPoll::DefaultPollTimeoutMs;
int events = getPollEvents(std::chrono::steady_clock::now(), timeoutMaxMs);
os << "\t" << getFD() << "\t" << events << "\t"
<< _inBuffer.size() << "\t" << _outBuffer.size() << "\t"
<< " r: " << _bytesRecvd << "\t w: " << _bytesSent << "\t";
_socketHandler->dumpState(os);
if (_inBuffer.size() > 0)
Util::dumpHex(os, "\t\tinBuffer:\n", "\t\t", _inBuffer);
if (_outBuffer.size() > 0)
Util::dumpHex(os, "\t\toutBuffer:\n", "\t\t", _inBuffer);
}
void StreamSocket::send(Poco::Net::HTTPResponse& response)
{
response.set("User-Agent", HTTP_AGENT_STRING);
response.set("Date", Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT));
std::ostringstream oss;
response.write(oss);
send(oss.str());
}
void SocketPoll::dumpState(std::ostream& os)
{
// FIXME: NOT thread-safe! _pollSockets is modified from the polling thread!
os << " Poll [" << _pollSockets.size() << "] - wakeup r: "
<< _wakeup[0] << " w: " << _wakeup[1] << "\n";
if (_newCallbacks.size() > 0)
os << "\tcallbacks: " << _newCallbacks.size() << "\n";
os << "\tfd\tevents\trsize\twsize\n";
for (auto &i : _pollSockets)
i->dumpState(os);
}
/// Returns true on success only.
bool ServerSocket::bind(Type type, int port)
{
// Enable address reuse to avoid stalling after
// recycling, when previous socket is TIME_WAIT.
//TODO: Might be worth refactoring out.
const int reuseAddress = 1;
constexpr unsigned int len = sizeof(reuseAddress);
::setsockopt(getFD(), SOL_SOCKET, SO_REUSEADDR, &reuseAddress, len);
int rc;
if (_type == Socket::Type::IPv4)
{
struct sockaddr_in addrv4;
std::memset(&addrv4, 0, sizeof(addrv4));
addrv4.sin_family = AF_INET;
addrv4.sin_port = htons(port);
if (type == Type::Public)
addrv4.sin_addr.s_addr = type == htonl(INADDR_ANY);
else
addrv4.sin_addr.s_addr = type == htonl(INADDR_LOOPBACK);
rc = ::bind(getFD(), (const sockaddr *)&addrv4, sizeof(addrv4));
}
else
{
struct sockaddr_in6 addrv6;
std::memset(&addrv6, 0, sizeof(addrv6));
addrv6.sin6_family = AF_INET6;
addrv6.sin6_port = htons(port);
if (type == Type::Public)
addrv6.sin6_addr = in6addr_any;
else
addrv6.sin6_addr = in6addr_loopback;
int ipv6only = _type == Socket::Type::All ? 0 : 1;
if (::setsockopt(getFD(), IPPROTO_IPV6, IPV6_V6ONLY, (char*)&ipv6only, sizeof(ipv6only)) == -1)
LOG_SYS("Failed set ipv6 socket to %d" << ipv6only);
rc = ::bind(getFD(), (const sockaddr *)&addrv6, sizeof(addrv6));
}
if (rc)
LOG_SYS("Failed to bind to: " << (_type == Socket::Type::IPv4 ? "IPv4" : "IPv6") << " port: " << port);
return rc == 0;
}
namespace HttpHelper
{
void sendUncompressedFileContent(const std::shared_ptr<StreamSocket>& socket,
const std::string& path,
const int bufferSize)
{
std::ifstream file(path, std::ios::binary);
std::unique_ptr<char[]> buf(new char[bufferSize]);
do
{
file.read(&buf[0], bufferSize);
const int size = file.gcount();
if (size > 0)
socket->send(&buf[0], size, true);
else
break;
}
while (file);
}
void sendDeflatedFileContent(const std::shared_ptr<StreamSocket>& socket,
const std::string& path,
const int fileSize)
{
// FIXME: Should compress once ahead of time
// compression of bundle.js takes significant time:
// 200's ms for level 9 (468k), 72ms for level 1(587k)
// down from 2Mb.
if (fileSize > 0)
{
std::ifstream file(path, std::ios::binary);
std::unique_ptr<char[]> buf(new char[fileSize]);
file.read(&buf[0], fileSize);
static const unsigned int Level = 1;
const long unsigned int size = file.gcount();
long unsigned int compSize = compressBound(size);
std::unique_ptr<char[]> cbuf(new char[compSize]);
compress2((Bytef *)&cbuf[0], &compSize, (Bytef *)&buf[0], size, Level);
if (size > 0)
socket->send(&cbuf[0], compSize, true);
}
}
void sendFile(const std::shared_ptr<StreamSocket>& socket,
const std::string& path,
const std::string& mediaType,
Poco::Net::HTTPResponse& response,
const bool noCache,
const bool deflate,
const bool headerOnly)
{
struct stat st;
if (stat(path.c_str(), &st) != 0)
{
LOG_WRN("#" << socket->getFD() << ": Failed to stat [" << path << "]. File will not be sent.");
throw Poco::FileNotFoundException("Failed to stat [" + path + "]. File will not be sent.");
}
if (!noCache)
{
// 60 * 60 * 24 * 128 (days) = 11059200
response.set("Cache-Control", "max-age=11059200");
response.set("ETag", "\"" LOOLWSD_VERSION_HASH "\"");
}
response.setContentType(mediaType);
response.add("X-Content-Type-Options", "nosniff");
int bufferSize = std::min(st.st_size, (off_t)Socket::MaximumSendBufferSize);
if (st.st_size >= socket->getSendBufferSize())
{
socket->setSocketBufferSize(bufferSize);
bufferSize = socket->getSendBufferSize();
}
// Disable deflate for now - until we can cache deflated data.
// FIXME: IE/Edge doesn't work well with deflate, so check with
// IE/Edge before enabling the deflate again
if (!deflate || true)
{
response.setContentLength(st.st_size);
LOG_TRC("#" << socket->getFD() << ": Sending " <<
(headerOnly ? "header for " : "") << " file [" << path << "].");
socket->send(response);
if (!headerOnly)
sendUncompressedFileContent(socket, path, bufferSize);
}
else
{
response.set("Content-Encoding", "deflate");
LOG_TRC("#" << socket->getFD() << ": Sending " <<
(headerOnly ? "header for " : "") << " file [" << path << "].");
socket->send(response);
if (!headerOnly)
sendDeflatedFileContent(socket, path, st.st_size);
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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