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libreoffice-online/kit/Kit.cpp
Gopi Krishna Menon de403fc12e Improve logging Information 
Improve logging information in setdocumentPassword for better clarity :)

Signed-off-by: Gopi Krishna Menon <gopi.menon@collabora.com>
Change-Id: I292991cbee2cf0cf1430ba4c5626b6e08ccbc0f5
2021-07-02 17:17:02 +03:00

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* 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/.
*/
/*
* The main entry point for the LibreOfficeKit process serving
* a document editing session.
*/
#include <config.h>
#include <dlfcn.h>
#ifdef __linux__
#include <ftw.h>
#include <sys/vfs.h>
#include <linux/magic.h>
#include <sys/capability.h>
#include <sys/sysmacros.h>
#endif
#ifdef __FreeBSD__
#include <sys/capsicum.h>
#include <ftw.h>
#define FTW_CONTINUE 0
#define FTW_STOP (-1)
#define FTW_SKIP_SUBTREE 0
#define FTW_ACTIONRETVAL 0
#endif
#include <unistd.h>
#include <utime.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sysexits.h>
#include <atomic>
#include <cassert>
#include <climits>
#include <condition_variable>
#include <chrono>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <memory>
#include <string>
#include <sstream>
#include <thread>
#define LOK_USE_UNSTABLE_API
#include <LibreOfficeKit/LibreOfficeKitInit.h>
#include <Poco/File.h>
#include <Poco/Exception.h>
#include <Poco/JSON/Object.h>
#include <Poco/JSON/Parser.h>
#include <Poco/Net/Socket.h>
#include <Poco/URI.h>
#include "ChildSession.hpp"
#include <Common.hpp>
#include <MobileApp.hpp>
#include <FileUtil.hpp>
#include <common/JailUtil.hpp>
#include "KitHelper.hpp"
#include "Kit.hpp"
#include <Protocol.hpp>
#include <Log.hpp>
#include <Png.hpp>
#include <Rectangle.hpp>
#include <TileDesc.hpp>
#include <Unit.hpp>
#include <UserMessages.hpp>
#include <Util.hpp>
#include "Watermark.hpp"
#include "RenderTiles.hpp"
#include "SetupKitEnvironment.hpp"
#include <common/ConfigUtil.hpp>
#include <common/TraceEvent.hpp>
#if !MOBILEAPP
#include <common/SigUtil.hpp>
#include <common/Seccomp.hpp>
#include <utility>
#endif
#ifdef FUZZER
#include <kit/DummyLibreOfficeKit.hpp>
#include <wsd/LOOLWSD.hpp>
#endif
#if MOBILEAPP
#include "LOOLWSD.hpp"
#endif
#ifdef IOS
#include "ios.h"
#endif
#define LIB_SOFFICEAPP "lib" "sofficeapp" ".so"
#define LIB_MERGED "lib" "mergedlo" ".so"
using Poco::Exception;
using Poco::File;
using Poco::JSON::Array;
using Poco::JSON::Object;
using Poco::JSON::Parser;
using Poco::URI;
#ifndef BUILDING_TESTS
using Poco::Path;
#endif
using namespace LOOLProtocol;
extern "C" { void dump_kit_state(void); /* easy for gdb */ }
#if !MOBILEAPP
// A Kit process hosts only a single document in its lifetime.
class Document;
static Document *singletonDocument = nullptr;
#endif
/// Used for test code to accelerating waiting until idle and to
/// flush sockets with a 'processtoidle' -> 'idle' reply.
static std::chrono::steady_clock::time_point ProcessToIdleDeadline;
#ifndef BUILDING_TESTS
static bool AnonymizeUserData = false;
static uint64_t AnonymizationSalt = 82589933;
#endif
/// When chroot is enabled, this is blank as all
/// the paths inside the jail, relative to it's jail.
/// E.g. /tmp/user/docs/...
/// However, without chroot, the jail path is
/// absolute in the system root.
/// I.e. ChildRoot/JailId/tmp/user/docs/...
/// We need to know where the jail really is
/// because WSD doesn't know if chroot will succeed
/// or fail, but it assumes the document path to
/// be relative to the root of the jail (i.e. chroot
/// expected to succeed). If it fails, or when caps
/// are disabled, file paths would be relative to the
/// system root, not the jail.
static std::string JailRoot;
#if !MOBILEAPP
static void flushTraceEventRecordings();
#endif
// Abnormally we get LOK events from another thread, which must be
// push safely into our main poll loop to process to keep all
// socket buffer & event processing in a single, thread.
bool pushToMainThread(LibreOfficeKitCallback cb, int type, const char *p, void *data);
#if !MOBILEAPP
static LokHookFunction2* initFunction = nullptr;
namespace
{
#ifndef BUILDING_TESTS
enum class LinkOrCopyType
{
All,
LO
};
LinkOrCopyType linkOrCopyType;
std::string sourceForLinkOrCopy;
Path destinationForLinkOrCopy;
bool forceInitialCopy; // some stackable file-systems have very slow first hard link creation
std::string linkableForLinkOrCopy; // Place to stash copies that we can hard-link from
std::chrono::time_point<std::chrono::steady_clock> linkOrCopyStartTime;
bool linkOrCopyVerboseLogging = false;
unsigned linkOrCopyFileCount = 0; // Track to help quantify the link-or-copy performance.
constexpr unsigned SlowLinkOrCopyLimitInSecs = 2; // After this many seconds, start spamming the logs.
bool detectSlowStackingFileSystem(const std::string &directory)
{
#ifdef __linux__
#ifndef OVERLAYFS_SUPER_MAGIC
// From linux/magic.h.
#define OVERLAYFS_SUPER_MAGIC 0x794c7630
#endif
struct statfs fs;
if (::statfs(directory.c_str(), &fs) != 0)
{
LOG_SYS("statfs failed on '" << directory << "'");
return false;
}
switch (fs.f_type) {
// case FUSE_SUPER_MAGIC: ?
case OVERLAYFS_SUPER_MAGIC:
return true;
default:
return false;
}
#else
(void)directory;
return false;
#endif
}
/// Returns the LinkOrCopyType as a human-readable string (for logging).
std::string linkOrCopyTypeString(LinkOrCopyType type)
{
switch (type)
{
case LinkOrCopyType::LO:
return "LibreOffice";
case LinkOrCopyType::All:
return "all";
default:
assert(!"Unknown LinkOrCopyType.");
return "unknown";
}
}
bool shouldCopyDir(const char *path)
{
switch (linkOrCopyType)
{
case LinkOrCopyType::LO:
return
strcmp(path, "program/wizards") != 0 &&
strcmp(path, "sdk") != 0 &&
strcmp(path, "debugsource") != 0 &&
strcmp(path, "share/basic") != 0 &&
strncmp(path, "share/extensions/dict-", // preloaded
sizeof("share/extensions/dict")) != 0 &&
strcmp(path, "share/Scripts/java") != 0 &&
strcmp(path, "share/Scripts/javascript") != 0 &&
strcmp(path, "share/config/wizard") != 0 &&
strcmp(path, "readmes") != 0 &&
strcmp(path, "help") != 0;
default: // LinkOrCopyType::All
return true;
}
}
bool shouldLinkFile(const char *path)
{
switch (linkOrCopyType)
{
case LinkOrCopyType::LO:
{
if (strstr(path, "LICENSE") || strstr(path, "EULA") || strstr(path, "CREDITS")
|| strstr(path, "NOTICE"))
return false;
const char* dot = strrchr(path, '.');
if (!dot)
return true;
if (!strcmp(dot, ".dbg"))
return false;
if (!strcmp(dot, ".so"))
{
// NSS is problematic ...
if (strstr(path, "libnspr4") ||
strstr(path, "libplds4") ||
strstr(path, "libplc4") ||
strstr(path, "libnss3") ||
strstr(path, "libnssckbi") ||
strstr(path, "libnsutil3") ||
strstr(path, "libssl3") ||
strstr(path, "libsoftokn3") ||
strstr(path, "libsqlite3") ||
strstr(path, "libfreeblpriv3"))
return true;
// As is Python ...
if (strstr(path, "python-core"))
return true;
// otherwise drop the rest of the code.
return false;
}
const char *vers;
if ((vers = strstr(path, ".so."))) // .so.[digit]+
{
for(int i = sizeof (".so."); vers[i] != '\0'; ++i)
if (!isdigit(vers[i]) && vers[i] != '.')
return true;
return false;
}
return true;
}
default: // LinkOrCopyType::All
return true;
}
}
void linkOrCopyFile(const char* fpath, const std::string& newPath)
{
++linkOrCopyFileCount;
if (linkOrCopyVerboseLogging)
LOG_INF("Linking file \"" << fpath << "\" to \"" << newPath << '"');
if (!forceInitialCopy)
{
// first try a simple hard-link
if (link(fpath, newPath.c_str()) == 0)
return;
}
// else always copy before linking to linkable/
// incrementally build our 'linkable/' copy nearby
static bool canChown = true; // only if we can get permissions right
if ((forceInitialCopy || errno == EXDEV) && canChown)
{
// then copy somewhere closer and hard link from there
if (!forceInitialCopy)
LOG_TRC("link(\"" << fpath << "\", \"" << newPath << "\") failed: " << strerror(errno)
<< ". Will try to link template.");
std::string linkableCopy = linkableForLinkOrCopy + fpath;
if (::link(linkableCopy.c_str(), newPath.c_str()) == 0)
return;
if (errno == ENOENT)
{
File(Path(linkableCopy).parent()).createDirectories();
if (!FileUtil::copy(fpath, linkableCopy.c_str(), /*log=*/false, /*throw_on_error=*/false))
LOG_TRC("Failed to create linkable copy [" << fpath << "] to [" << linkableCopy.c_str() << "]");
else {
// Match system permissions, so a file we can write is not shared across jails.
struct stat ownerInfo;
if (::stat(fpath, &ownerInfo) != 0 ||
::chown(linkableCopy.c_str(), ownerInfo.st_uid, ownerInfo.st_gid) != 0)
{
LOG_ERR("Failed to stat or chown " << ownerInfo.st_uid << ":" << ownerInfo.st_gid <<
" " << linkableCopy << ": " << strerror(errno) << " missing cap_chown?, disabling linkable");
unlink(linkableCopy.c_str());
canChown = false;
}
else if (::link(linkableCopy.c_str(), newPath.c_str()) == 0)
return;
}
}
LOG_TRC("link(\"" << linkableCopy << "\", \"" << newPath << "\") failed: " << strerror(errno)
<< ". Cannot create linkable copy.");
}
static bool warned = false;
if (!warned)
{
LOG_ERR("link(\"" << fpath << "\", \"" << newPath.c_str() << "\") failed: " << strerror(errno)
<< ". Very slow copying path triggered.");
warned = true;
} else
LOG_TRC("link(\"" << fpath << "\", \"" << newPath.c_str() << "\") failed: " << strerror(errno)
<< ". Will copy.");
if (!FileUtil::copy(fpath, newPath.c_str(), /*log=*/false, /*throw_on_error=*/false))
{
LOG_FTL("Failed to copy or link [" << fpath << "] to [" << newPath << "]. Exiting.");
Log::shutdown();
std::_Exit(EX_SOFTWARE);
}
}
int linkOrCopyFunction(const char *fpath,
const struct stat* sb,
int typeflag,
struct FTW* /*ftwbuf*/)
{
if (strcmp(fpath, sourceForLinkOrCopy.c_str()) == 0)
{
LOG_TRC("nftw: Skipping redundant path: " << fpath);
return FTW_CONTINUE;
}
if (!linkOrCopyVerboseLogging)
{
const auto durationInSecs = std::chrono::duration_cast<std::chrono::seconds>(
std::chrono::steady_clock::now() - linkOrCopyStartTime);
if (durationInSecs.count() > SlowLinkOrCopyLimitInSecs)
{
LOG_WRN("Linking/copying files from "
<< sourceForLinkOrCopy << " to " << destinationForLinkOrCopy.toString()
<< " is taking too much time. Enabling verbose link/copy logging.");
linkOrCopyVerboseLogging = true;
}
}
assert(fpath[strlen(sourceForLinkOrCopy.c_str())] == '/');
const char *relativeOldPath = fpath + strlen(sourceForLinkOrCopy.c_str()) + 1;
const Path newPath(destinationForLinkOrCopy, Path(relativeOldPath));
switch (typeflag)
{
case FTW_F:
case FTW_SLN:
File(newPath.parent()).createDirectories();
if (shouldLinkFile(relativeOldPath))
linkOrCopyFile(fpath, newPath.toString());
break;
case FTW_D:
{
struct stat st;
if (stat(fpath, &st) == -1)
{
LOG_SYS("nftw: stat(\"" << fpath << "\") failed");
return FTW_STOP;
}
if (!shouldCopyDir(relativeOldPath))
{
LOG_TRC("nftw: Skipping redundant path: " << relativeOldPath);
return FTW_SKIP_SUBTREE;
}
File(newPath).createDirectories();
struct utimbuf ut;
ut.actime = st.st_atime;
ut.modtime = st.st_mtime;
if (utime(newPath.toString().c_str(), &ut) == -1)
{
LOG_SYS("nftw: utime(\"" << newPath.toString() << "\") failed");
return FTW_STOP;
}
}
break;
case FTW_SL:
{
const std::size_t size = sb->st_size;
char target[size + 1];
const ssize_t written = readlink(fpath, target, size);
if (written <= 0 || static_cast<std::size_t>(written) > size)
{
LOG_SYS("nftw: readlink(\"" << fpath << "\") failed");
Log::shutdown();
std::_Exit(EX_SOFTWARE);
}
target[written] = '\0';
File(newPath.parent()).createDirectories();
if (symlink(target, newPath.toString().c_str()) == -1)
{
LOG_SYS("nftw: symlink(\"" << target << "\", \"" << newPath.toString()
<< "\") failed");
return FTW_STOP;
}
}
break;
case FTW_DNR:
LOG_ERR("nftw: Cannot read directory '" << fpath << '\'');
return FTW_STOP;
case FTW_NS:
LOG_ERR("nftw: stat failed for '" << fpath << '\'');
return FTW_STOP;
default:
LOG_FTL("nftw: unexpected typeflag: '" << typeflag);
assert(!"nftw: unexpected typeflag.");
break;
}
return FTW_CONTINUE;
}
void linkOrCopy(std::string source,
const Path& destination,
std::string linkable,
LinkOrCopyType type)
{
std::string resolved = FileUtil::realpath(source);
if (resolved != source)
{
LOG_DBG("linkOrCopy: Using real path [" << resolved << "] instead of original link ["
<< source << "].");
source = std::move(resolved);
}
LOG_INF("linkOrCopy " << linkOrCopyTypeString(type) << " from [" << source << "] to ["
<< destination.toString() << "].");
linkOrCopyType = type;
sourceForLinkOrCopy = source;
if (sourceForLinkOrCopy.back() == '/')
sourceForLinkOrCopy.pop_back();
destinationForLinkOrCopy = destination;
linkableForLinkOrCopy = linkable;
linkOrCopyFileCount = 0;
linkOrCopyStartTime = std::chrono::steady_clock::now();
forceInitialCopy = detectSlowStackingFileSystem(destination.toString());
if (nftw(source.c_str(), linkOrCopyFunction, 10, FTW_ACTIONRETVAL|FTW_PHYS) == -1)
{
LOG_SYS("linkOrCopy: nftw() failed for '" << source << '\'');
}
if (linkOrCopyVerboseLogging)
{
linkOrCopyVerboseLogging = false;
const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::steady_clock::now() - linkOrCopyStartTime).count();
const double seconds = (ms + 1) / 1000.; // At least 1ms to avoid div-by-zero.
const auto rate = linkOrCopyFileCount / seconds;
LOG_INF("Linking/Copying of " << linkOrCopyFileCount << " files from " << source
<< " to " << destinationForLinkOrCopy.toString()
<< " finished in " << seconds << " seconds, or " << rate
<< " files / second.");
}
}
#ifndef __FreeBSD__
void dropCapability(cap_value_t capability)
{
cap_t caps;
cap_value_t cap_list[] = { capability };
caps = cap_get_proc();
if (caps == nullptr)
{
LOG_SFL("cap_get_proc() failed");
Log::shutdown();
std::_Exit(1);
}
char *capText = cap_to_text(caps, nullptr);
LOG_TRC("Capabilities first: " << capText);
cap_free(capText);
if (cap_set_flag(caps, CAP_EFFECTIVE, sizeof(cap_list)/sizeof(cap_list[0]), cap_list, CAP_CLEAR) == -1 ||
cap_set_flag(caps, CAP_PERMITTED, sizeof(cap_list)/sizeof(cap_list[0]), cap_list, CAP_CLEAR) == -1)
{
LOG_SFL("cap_set_flag() failed");
Log::shutdown();
std::_Exit(1);
}
if (cap_set_proc(caps) == -1)
{
LOG_SFL("cap_set_proc() failed");
Log::shutdown();
std::_Exit(1);
}
capText = cap_to_text(caps, nullptr);
LOG_TRC("Capabilities now: " << capText);
cap_free(capText);
cap_free(caps);
}
#endif // __FreeBSD__
#endif
}
#endif
/// A document container.
/// Owns LOKitDocument instance and connections.
/// Manages the lifetime of a document.
/// Technically, we can host multiple documents
/// per process. But for security reasons don't.
/// However, we could have a loolkit instance
/// per user or group of users (a trusted circle).
class Document final : public DocumentManagerInterface
{
public:
/// We have two types of password protected documents
/// 1) Documents which require password to view
/// 2) Document which require password to modify
enum class PasswordType { ToView, ToModify };
public:
Document(const std::shared_ptr<lok::Office>& loKit,
const std::string& jailId,
const std::string& docKey,
const std::string& docId,
const std::string& url,
std::shared_ptr<TileQueue> tileQueue,
const std::shared_ptr<WebSocketHandler>& websocketHandler,
unsigned mobileAppDocId)
: _loKit(loKit),
_jailId(jailId),
_docKey(docKey),
_docId(docId),
_url(url),
_obfuscatedFileId(Util::getFilenameFromURL(docKey)),
_tileQueue(std::move(tileQueue)),
_websocketHandler(websocketHandler),
_haveDocPassword(false),
_isDocPasswordProtected(false),
_docPasswordType(PasswordType::ToView),
_stop(false),
_editorId(-1),
_editorChangeWarning(false),
_mobileAppDocId(mobileAppDocId),
_inputProcessingEnabled(true)
{
LOG_INF("Document ctor for [" << _docKey <<
"] url [" << anonymizeUrl(_url) << "] on child [" << _jailId <<
"] and id [" << _docId << "].");
assert(_loKit);
#if !MOBILEAPP
assert(singletonDocument == nullptr);
singletonDocument = this;
#endif
}
virtual ~Document()
{
LOG_INF("~Document dtor for [" << _docKey <<
"] url [" << anonymizeUrl(_url) << "] on child [" << _jailId <<
"] and id [" << _docId << "]. There are " <<
_sessions.size() << " views.");
// Wait for the callback worker to finish.
_stop = true;
_tileQueue->put("eof");
for (const auto& session : _sessions)
{
session.second->resetDocManager();
}
#ifdef IOS
deallocateDocumentDataForMobileAppDocId(_mobileAppDocId);
#endif
}
const std::string& getUrl() const { return _url; }
/// Post the message - in the unipoll world we're in the right thread anyway
bool postMessage(const char* data, int size, const WSOpCode code) const
{
LOG_TRC("postMessage called with: " << getAbbreviatedMessage(data, size));
if (!_websocketHandler)
{
LOG_ERR("Child Doc: Bad socket while sending [" << getAbbreviatedMessage(data, size) << "].");
return false;
}
_websocketHandler->sendMessage(data, size, code);
return true;
}
bool createSession(const std::string& sessionId, int canonicalViewId)
{
try
{
if (_sessions.find(sessionId) != _sessions.end())
{
LOG_ERR("Session [" << sessionId << "] on url [" << anonymizeUrl(_url) << "] already exists.");
return true;
}
LOG_INF("Creating " << (_sessions.empty() ? "first" : "new") <<
" session for url: " << anonymizeUrl(_url) << " for sessionId: " <<
sessionId << " on jailId: " << _jailId);
auto session = std::make_shared<ChildSession>(
_websocketHandler, sessionId,
_jailId, JailRoot, *this);
_sessions.emplace(sessionId, session);
session->setCanonicalViewId(canonicalViewId);
int viewId = session->getViewId();
_lastUpdatedAt[viewId] = std::chrono::steady_clock::now();
_speedCount[viewId] = 0;
LOG_DBG("Sessions: " << _sessions.size());
return true;
}
catch (const std::exception& ex)
{
LOG_ERR("Exception while creating session [" << sessionId <<
"] on url [" << anonymizeUrl(_url) << "] - '" << ex.what() << "'.");
return false;
}
}
/// Purges dead connections and returns
/// the remaining number of clients.
/// Returns -1 on failure.
std::size_t purgeSessions()
{
std::vector<std::shared_ptr<ChildSession>> deadSessions;
std::size_t num_sessions = 0;
{
// If there are no live sessions, we don't need to do anything at all and can just
// bluntly exit, no need to clean up our own data structures. Also, there is a bug that
// causes the deadSessions.clear() call below to crash in some situations when the last
// session is being removed.
for (auto it = _sessions.cbegin(); it != _sessions.cend(); )
{
if (it->second->isCloseFrame())
{
deadSessions.push_back(it->second);
it = _sessions.erase(it);
}
else
{
++it;
}
}
num_sessions = _sessions.size();
#if !MOBILEAPP
if (num_sessions == 0)
{
LOG_FTL("Document [" << anonymizeUrl(_url) << "] has no more views, exiting bluntly.");
flushTraceEventRecordings();
Log::shutdown();
std::_Exit(EX_OK);
}
#endif
}
deadSessions.clear();
return num_sessions;
}
/// Set Document password for given URL
void setDocumentPassword(int passwordType)
{
// Log whether the document is password protected and a password is provided
LOG_INF("setDocumentPassword: passwordProtected=" << _isDocPasswordProtected <<
" passwordProvided=" << _haveDocPassword);
if (_isDocPasswordProtected && _haveDocPassword)
{
// it means this is the second attempt with the wrong password; abort the load operation
_loKit->setDocumentPassword(_jailedUrl.c_str(), nullptr);
return;
}
// One thing for sure, this is a password protected document
_isDocPasswordProtected = true;
if (passwordType == LOK_CALLBACK_DOCUMENT_PASSWORD)
_docPasswordType = PasswordType::ToView;
else if (passwordType == LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY)
_docPasswordType = PasswordType::ToModify;
LOG_INF("Calling _loKit->setDocumentPassword");
if (_haveDocPassword)
_loKit->setDocumentPassword(_jailedUrl.c_str(), _docPassword.c_str());
else
_loKit->setDocumentPassword(_jailedUrl.c_str(), nullptr);
LOG_INF("setDocumentPassword returned.");
}
void renderTile(const StringVector& tokens)
{
TileCombined tileCombined(TileDesc::parse(tokens));
renderTiles(tileCombined, false);
}
void renderCombinedTiles(const StringVector& tokens)
{
TileCombined tileCombined = TileCombined::parse(tokens);
renderTiles(tileCombined, true);
}
void renderTiles(TileCombined &tileCombined, bool combined)
{
// Find a session matching our view / render settings.
const auto session = _sessions.findByCanonicalId(tileCombined.getNormalizedViewId());
if (!session)
{
LOG_ERR("Session is not found. Maybe exited after rendering request.");
return;
}
if (!_loKitDocument)
{
LOG_ERR("Tile rendering requested before loading document.");
return;
}
if (_loKitDocument->getViewsCount() <= 0)
{
LOG_ERR("Tile rendering requested without views.");
return;
}
#ifdef FIXME_RENDER_SETTINGS
// if necessary select a suitable rendering view eg. with 'show non-printing chars'
if (tileCombined.getNormalizedViewId())
_loKitDocument->setView(session->getViewId());
#endif
const auto blenderFunc = [&](unsigned char* data, int offsetX, int offsetY,
std::size_t pixmapWidth, std::size_t pixmapHeight,
int pixelWidth, int pixelHeight, LibreOfficeKitTileMode mode) {
if (session->watermark())
session->watermark()->blending(data, offsetX, offsetY, pixmapWidth, pixmapHeight,
pixelWidth, pixelHeight, mode);
};
const auto postMessageFunc = [&](const char* buffer, std::size_t length) {
postMessage(buffer, length, WSOpCode::Binary);
};
if (!RenderTiles::doRender(_loKitDocument, tileCombined, _pngCache, _pngPool, combined,
blenderFunc, postMessageFunc))
{
LOG_DBG("All tiles skipped, not producing empty tilecombine: message");
return;
}
}
bool sendTextFrame(const std::string& message)
{
return sendFrame(message.data(), message.size());
}
bool sendFrame(const char* buffer, int length, WSOpCode opCode = WSOpCode::Text) override
{
try
{
return postMessage(buffer, length, opCode);
}
catch (const Exception& exc)
{
LOG_ERR("Document::sendFrame: Exception: " << exc.displayText() <<
(exc.nested() ? "( " + exc.nested()->displayText() + ')' : ""));
}
return false;
}
void alertAllUsers(const std::string& cmd, const std::string& kind) override
{
alertAllUsers("errortoall: cmd=" + cmd + " kind=" + kind);
}
unsigned getMobileAppDocId() const override
{
return _mobileAppDocId;
}
static void GlobalCallback(const int type, const char* p, void* data)
{
if (SigUtil::getTerminationFlag())
return;
// unusual LOK event from another thread,
// pData - is Document with process' lifetime.
if (pushToMainThread(GlobalCallback, type, p, data))
return;
const std::string payload = p ? p : "(nil)";
Document* self = static_cast<Document*>(data);
if (type == LOK_CALLBACK_PROFILE_FRAME)
{
// We must send the trace data to the WSD process for output
LOG_TRC("Document::GlobalCallback " << lokCallbackTypeToString(type) << ": " << payload.length() << " bytes.");
self->sendTextFrame("traceevent: \n" + payload);
return;
}
LOG_TRC("Document::GlobalCallback " << lokCallbackTypeToString(type) <<
" [" << payload << "].");
if (type == LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY ||
type == LOK_CALLBACK_DOCUMENT_PASSWORD)
{
// Mark the document password type.
self->setDocumentPassword(type);
return;
}
else if (type == LOK_CALLBACK_STATUS_INDICATOR_SET_VALUE)
{
for (auto& it : self->_sessions)
{
std::shared_ptr<ChildSession> session = it.second;
if (session && !session->isCloseFrame())
{
session->loKitCallback(type, payload);
}
}
return;
}
else if (type == LOK_CALLBACK_JSDIALOG || type == LOK_CALLBACK_HYPERLINK_CLICKED)
{
if (self->_sessions.size() == 1)
{
auto it = self->_sessions.begin();
std::shared_ptr<ChildSession> session = it->second;
if (session && !session->isCloseFrame())
{
session->loKitCallback(type, payload);
// TODO. It should filter some messages
// before loading the document
session->getProtocol()->enableProcessInput(true);
}
}
}
// Broadcast leftover status indicator callbacks to all clients
self->broadcastCallbackToClients(type, payload);
}
static void ViewCallback(const int type, const char* p, void* data)
{
if (SigUtil::getTerminationFlag())
return;
// unusual LOK event from another thread.
// pData - is CallbackDescriptors which share process' lifetime.
if (pushToMainThread(ViewCallback, type, p, data))
return;
CallbackDescriptor* descriptor = static_cast<CallbackDescriptor*>(data);
assert(descriptor && "Null callback data.");
assert(descriptor->getDoc() && "Null Document instance.");
std::shared_ptr<TileQueue> tileQueue = descriptor->getDoc()->getTileQueue();
assert(tileQueue && "Null TileQueue.");
const std::string payload = p ? p : "(nil)";
LOG_TRC("Document::ViewCallback [" << descriptor->getViewId() <<
"] [" << lokCallbackTypeToString(type) <<
"] [" << payload << "].");
// when we examine the content of the JSON
std::string targetViewId;
if (type == LOK_CALLBACK_CELL_CURSOR)
{
StringVector tokens(Util::tokenize(payload, ','));
// Payload may be 'EMPTY'.
if (tokens.size() == 4)
{
int cursorX = std::stoi(tokens[0]);
int cursorY = std::stoi(tokens[1]);
int cursorWidth = std::stoi(tokens[2]);
int cursorHeight = std::stoi(tokens[3]);
tileQueue->updateCursorPosition(0, 0, cursorX, cursorY, cursorWidth, cursorHeight);
}
}
else if (type == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR)
{
Poco::JSON::Parser parser;
const Poco::Dynamic::Var result = parser.parse(payload);
const auto& command = result.extract<Poco::JSON::Object::Ptr>();
std::string rectangle = command->get("rectangle").toString();
StringVector tokens(Util::tokenize(rectangle, ','));
// Payload may be 'EMPTY'.
if (tokens.size() == 4)
{
int cursorX = std::stoi(tokens[0]);
int cursorY = std::stoi(tokens[1]);
int cursorWidth = std::stoi(tokens[2]);
int cursorHeight = std::stoi(tokens[3]);
tileQueue->updateCursorPosition(0, 0, cursorX, cursorY, cursorWidth, cursorHeight);
}
}
else if (type == LOK_CALLBACK_INVALIDATE_VIEW_CURSOR ||
type == LOK_CALLBACK_CELL_VIEW_CURSOR)
{
Poco::JSON::Parser parser;
const Poco::Dynamic::Var result = parser.parse(payload);
const auto& command = result.extract<Poco::JSON::Object::Ptr>();
targetViewId = command->get("viewId").toString();
std::string part = command->get("part").toString();
std::string text = command->get("rectangle").toString();
StringVector tokens(Util::tokenize(text, ','));
// Payload may be 'EMPTY'.
if (tokens.size() == 4)
{
int cursorX = std::stoi(tokens[0]);
int cursorY = std::stoi(tokens[1]);
int cursorWidth = std::stoi(tokens[2]);
int cursorHeight = std::stoi(tokens[3]);
tileQueue->updateCursorPosition(std::stoi(targetViewId), std::stoi(part), cursorX, cursorY, cursorWidth, cursorHeight);
}
}
// merge various callback types together if possible
if (type == LOK_CALLBACK_INVALIDATE_TILES ||
type == LOK_CALLBACK_DOCUMENT_SIZE_CHANGED)
{
// no point in handling invalidations or page resizes per-view,
// all views have to be in sync
tileQueue->put("callback all " + std::to_string(type) + ' ' + payload);
}
else
tileQueue->put("callback " + std::to_string(descriptor->getViewId()) + ' ' + std::to_string(type) + ' ' + payload);
LOG_TRC("Document::ViewCallback end.");
}
private:
/// Helper method to broadcast callback and its payload to all clients
void broadcastCallbackToClients(const int type, const std::string& payload)
{
_tileQueue->put("callback all " + std::to_string(type) + ' ' + payload);
}
/// Load a document (or view) and register callbacks.
bool onLoad(const std::string& sessionId,
const std::string& uriAnonym,
const std::string& renderOpts) override
{
LOG_INF("Loading url [" << uriAnonym << "] for session [" << sessionId <<
"] which has " << (_sessions.size() - 1) << " sessions.");
// This shouldn't happen, but for sanity.
const auto it = _sessions.find(sessionId);
if (it == _sessions.end() || !it->second)
{
LOG_ERR("Cannot find session [" << sessionId << "] to load view for.");
return false;
}
std::shared_ptr<ChildSession> session = it->second;
try
{
if (!load(session, renderOpts))
return false;
}
catch (const std::exception &exc)
{
LOG_ERR("Exception while loading url [" << uriAnonym <<
"] for session [" << sessionId << "]: " << exc.what());
return false;
}
return true;
}
void onUnload(const ChildSession& session) override
{
const auto& sessionId = session.getId();
LOG_INF("Unloading session [" << sessionId << "] on url [" << anonymizeUrl(_url) << "].");
const int viewId = session.getViewId();
_tileQueue->removeCursorPosition(viewId);
if (_loKitDocument == nullptr)
{
LOG_ERR("Unloading session [" << sessionId << "] without loKitDocument.");
return;
}
_loKitDocument->setView(viewId);
_loKitDocument->registerCallback(nullptr, nullptr);
_loKit->registerCallback(nullptr, nullptr);
int viewCount = _loKitDocument->getViewsCount();
if (viewCount == 1)
{
#if !MOBILEAPP
if (_sessions.empty())
{
LOG_INF("Document [" << anonymizeUrl(_url) << "] has no more views, exiting bluntly.");
flushTraceEventRecordings();
Log::shutdown();
std::_Exit(EX_OK);
}
#endif
LOG_INF("Document [" << anonymizeUrl(_url) << "] has no more views, but has " <<
_sessions.size() << " sessions still. Destroying the document.");
#ifdef __ANDROID__
_loKitDocumentForAndroidOnly.reset();
#endif
_loKitDocument.reset();
LOG_INF("Document [" << anonymizeUrl(_url) << "] session [" << sessionId << "] unloaded Document.");
return;
}
else
{
_loKitDocument->destroyView(viewId);
}
// Since callback messages are processed on idle-timer,
// we could receive callbacks after destroying a view.
// Retain the CallbackDescriptor object, which is shared with Core.
// Do not: _viewIdToCallbackDescr.erase(viewId);
viewCount = _loKitDocument->getViewsCount();
LOG_INF("Document [" << anonymizeUrl(_url) << "] session [" <<
sessionId << "] unloaded view [" << viewId << "]. Have " <<
viewCount << " view" << (viewCount != 1 ? "s." : "."));
if (viewCount > 0)
{
// Broadcast updated view info
notifyViewInfo();
}
}
std::map<int, UserInfo> getViewInfo() override
{
return _sessionUserInfo;
}
std::shared_ptr<TileQueue>& getTileQueue() override
{
return _tileQueue;
}
int getEditorId() const override
{
return _editorId;
}
/// Notify all views with the given message
bool notifyAll(const std::string& msg) override
{
// Broadcast updated viewinfo to all clients.
return sendTextFrame("client-all " + msg);
}
/// Notify all views of viewId and their associated usernames
void notifyViewInfo() override
{
// Get the list of view ids from the core
const int viewCount = getLOKitDocument()->getViewsCount();
std::vector<int> viewIds(viewCount);
getLOKitDocument()->getViewIds(viewIds.data(), viewCount);
const std::map<int, UserInfo> viewInfoMap = _sessionUserInfo;
const std::map<std::string, int> viewColorsMap = getViewColors();
// Double check if list of viewids from core and our list matches,
// and create an array of JSON objects containing id and username
std::ostringstream oss;
oss << "viewinfo: [";
for (const auto& viewId : viewIds)
{
oss << "{\"id\":" << viewId << ',';
int color = 0;
const auto itView = viewInfoMap.find(viewId);
if (itView == viewInfoMap.end())
{
LOG_ERR("No username found for viewId [" << viewId << "].");
oss << "\"username\":\"Unknown\",";
}
else
{
oss << "\"userid\":\"" << itView->second.getUserId() << "\",";
const std::string username = itView->second.getUserName();
oss << "\"username\":\"" << username << "\",";
if (!itView->second.getUserExtraInfo().empty())
oss << "\"userextrainfo\":" << itView->second.getUserExtraInfo() << ',';
const bool readonly = itView->second.isReadOnly();
oss << "\"readonly\":\"" << readonly << "\",";
const auto it = viewColorsMap.find(username);
if (it != viewColorsMap.end())
{
color = it->second;
}
}
oss << "\"color\":" << color << "},";
}
if (viewCount > 0)
oss.seekp(-1, std::ios_base::cur); // Remove last comma.
oss << ']';
// Broadcast updated viewinfo to all clients.
notifyAll(oss.str());
}
void updateEditorSpeeds(int id, int speed) override
{
int maxSpeed = -1, fastestUser = -1;
auto now = std::chrono::steady_clock::now();
_lastUpdatedAt[id] = now;
_speedCount[id] = speed;
for (const auto& it : _sessions)
{
const std::shared_ptr<ChildSession> session = it.second;
int sessionId = session->getViewId();
auto duration = (_lastUpdatedAt[id] - now);
std::chrono::milliseconds::rep durationInMs = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
if (_speedCount[sessionId] != 0 && durationInMs > 5000)
{
_speedCount[sessionId] = session->getSpeed();
_lastUpdatedAt[sessionId] = now;
}
if (_speedCount[sessionId] > maxSpeed)
{
maxSpeed = _speedCount[sessionId];
fastestUser = sessionId;
}
}
// 0 for preventing selection of the first always
// 1 for preventing new users from directly becoming editors
if (_editorId != fastestUser && (maxSpeed != 0 && maxSpeed != 1)) {
if (!_editorChangeWarning && _editorId != -1)
{
_editorChangeWarning = true;
}
else
{
_editorChangeWarning = false;
_editorId = fastestUser;
for (const auto& it : _sessions)
it.second->sendTextFrame("editor: " + std::to_string(_editorId));
}
}
else
_editorChangeWarning = false;
}
private:
// Get the color value for all author names from the core
std::map<std::string, int> getViewColors()
{
char* values = _loKitDocument->getCommandValues(".uno:TrackedChangeAuthors");
const std::string colorValues = std::string(values == nullptr ? "" : values);
std::free(values);
std::map<std::string, int> viewColors;
try
{
if (!colorValues.empty())
{
Poco::JSON::Parser parser;
Poco::JSON::Object::Ptr root = parser.parse(colorValues).extract<Poco::JSON::Object::Ptr>();
if (root->get("authors").type() == typeid(Poco::JSON::Array::Ptr))
{
Poco::JSON::Array::Ptr authorsArray = root->get("authors").extract<Poco::JSON::Array::Ptr>();
for (auto& authorVar: *authorsArray)
{
Poco::JSON::Object::Ptr authorObj = authorVar.extract<Poco::JSON::Object::Ptr>();
std::string authorName = authorObj->get("name").convert<std::string>();
int colorValue = authorObj->get("color").convert<int>();
viewColors[authorName] = colorValue;
}
}
}
}
catch(const Exception& exc)
{
LOG_ERR("Poco Exception: " << exc.displayText() <<
(exc.nested() ? " (" + exc.nested()->displayText() + ')' : ""));
}
return viewColors;
}
std::shared_ptr<lok::Document> load(const std::shared_ptr<ChildSession>& session,
const std::string& renderOpts)
{
const std::string sessionId = session->getId();
const std::string& uri = session->getJailedFilePath();
const std::string& uriAnonym = session->getJailedFilePathAnonym();
const std::string& userName = session->getUserName();
const std::string& userNameAnonym = session->getUserNameAnonym();
const std::string& docPassword = session->getDocPassword();
const bool haveDocPassword = session->getHaveDocPassword();
const std::string& lang = session->getLang();
const std::string& deviceFormFactor = session->getDeviceFormFactor();
const std::string& batchMode = session->getBatchMode();
const std::string& enableMacrosExecution = session->getEnableMacrosExecution();
const std::string& macroSecurityLevel = session->getMacroSecurityLevel();
std::string spellOnline;
std::string options;
if (!lang.empty())
options = "Language=" + lang;
if (!deviceFormFactor.empty())
options += ",DeviceFormFactor=" + deviceFormFactor;
if (!batchMode.empty())
options += ",Batch=" + batchMode;
if (!enableMacrosExecution.empty())
options += ",EnableMacrosExecution=" + enableMacrosExecution;
if (!macroSecurityLevel.empty())
options += ",MacroSecurityLevel=" + macroSecurityLevel;
if (!_loKitDocument)
{
// This is the first time we are loading the document
LOG_INF("Loading new document from URI: [" << uriAnonym << "] for session [" << sessionId << "].");
_loKit->registerCallback(GlobalCallback, this);
const int flags = LOK_FEATURE_DOCUMENT_PASSWORD
| LOK_FEATURE_DOCUMENT_PASSWORD_TO_MODIFY
| LOK_FEATURE_PART_IN_INVALIDATION_CALLBACK
| LOK_FEATURE_NO_TILED_ANNOTATIONS
| LOK_FEATURE_RANGE_HEADERS
| LOK_FEATURE_VIEWID_IN_VISCURSOR_INVALIDATION_CALLBACK;
_loKit->setOptionalFeatures(flags);
// Save the provided password with us and the jailed url
_haveDocPassword = haveDocPassword;
_docPassword = docPassword;
_jailedUrl = uri;
_isDocPasswordProtected = false;
const char *pURL = uri.c_str();
LOG_DBG("Calling lokit::documentLoad(" << FileUtil::anonymizeUrl(pURL) << ", \"" << options << "\").");
const auto start = std::chrono::steady_clock::now();
_loKitDocument.reset(_loKit->documentLoad(pURL, options.c_str()));
#ifdef __ANDROID__
_loKitDocumentForAndroidOnly = _loKitDocument;
#endif
const auto duration = std::chrono::steady_clock::now() - start;
const auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(duration);
LOG_DBG("Returned lokit::documentLoad(" << FileUtil::anonymizeUrl(pURL) << ") in "
<< elapsed);
#ifdef IOS
getDocumentDataForMobileAppDocId(_mobileAppDocId).loKitDocument = _loKitDocument.get();
#endif
if (!_loKitDocument || !_loKitDocument->get())
{
LOG_ERR("Failed to load: " << uriAnonym << ", error: " << _loKit->getError());
// Checking if wrong password or no password was reason for failure.
if (_isDocPasswordProtected)
{
LOG_INF("Document [" << uriAnonym << "] is password protected.");
if (!_haveDocPassword)
{
LOG_INF("No password provided for password-protected document [" << uriAnonym << "].");
std::string passwordFrame = "passwordrequired:";
if (_docPasswordType == PasswordType::ToView)
passwordFrame += "to-view";
else if (_docPasswordType == PasswordType::ToModify)
passwordFrame += "to-modify";
session->sendTextFrameAndLogError("error: cmd=load kind=" + passwordFrame);
}
else
{
LOG_INF("Wrong password for password-protected document [" << uriAnonym << "].");
session->sendTextFrameAndLogError("error: cmd=load kind=wrongpassword");
}
return nullptr;
}
session->sendTextFrameAndLogError("error: cmd=load kind=faileddocloading");
return nullptr;
}
// Only save the options on opening the document.
// No support for changing them after opening a document.
_renderOpts = renderOpts;
spellOnline = session->getSpellOnline();
}
else
{
LOG_INF("Document with url [" << uriAnonym << "] already loaded. Need to create new view for session [" << sessionId << "].");
// Check if this document requires password
if (_isDocPasswordProtected)
{
if (!haveDocPassword)
{
std::string passwordFrame = "passwordrequired:";
if (_docPasswordType == PasswordType::ToView)
passwordFrame += "to-view";
else if (_docPasswordType == PasswordType::ToModify)
passwordFrame += "to-modify";
session->sendTextFrameAndLogError("error: cmd=load kind=" + passwordFrame);
return nullptr;
}
else if (docPassword != _docPassword)
{
session->sendTextFrameAndLogError("error: cmd=load kind=wrongpassword");
return nullptr;
}
}
LOG_INF("Creating view to url [" << uriAnonym << "] for session [" << sessionId << "] with " << options << '.');
_loKitDocument->createView(options.c_str());
LOG_TRC("View to url [" << uriAnonym << "] created.");
}
LOG_INF("Initializing for rendering session [" << sessionId << "] on document url [" <<
anonymizeUrl(_url) << "] with: [" << makeRenderParams(_renderOpts, userNameAnonym, spellOnline) << "].");
// initializeForRendering() should be called before
// registerCallback(), as the previous creates a new view in Impress.
const std::string renderParams = makeRenderParams(_renderOpts, userName, spellOnline);
_loKitDocument->initializeForRendering(renderParams.c_str());
const int viewId = _loKitDocument->getView();
session->setViewId(viewId);
_sessionUserInfo[viewId] = UserInfo(session->getViewUserId(), session->getViewUserName(),
session->getViewUserExtraInfo(), session->isReadOnly());
_loKitDocument->setViewLanguage(viewId, lang.c_str());
// viewId's monotonically increase, and CallbackDescriptors are never freed.
_viewIdToCallbackDescr.emplace(viewId,
std::unique_ptr<CallbackDescriptor>(new CallbackDescriptor({ this, viewId })));
_loKitDocument->registerCallback(ViewCallback, _viewIdToCallbackDescr[viewId].get());
const int viewCount = _loKitDocument->getViewsCount();
LOG_INF("Document url [" << anonymizeUrl(_url) << "] for session [" <<
sessionId << "] loaded view [" << viewId << "]. Have " <<
viewCount << " view" << (viewCount != 1 ? "s." : "."));
session->initWatermark();
return _loKitDocument;
}
bool forwardToChild(const std::string& prefix, const std::vector<char>& payload)
{
assert(payload.size() > prefix.size());
// Remove the prefix and trim.
std::size_t index = prefix.size();
for ( ; index < payload.size(); ++index)
{
if (payload[index] != ' ')
{
break;
}
}
const char* data = payload.data() + index;
std::size_t size = payload.size() - index;
std::string name;
std::string sessionId;
if (LOOLProtocol::parseNameValuePair(prefix, name, sessionId, '-') && name == "child")
{
const auto it = _sessions.find(sessionId);
if (it != _sessions.end())
{
std::shared_ptr<ChildSession> session = it->second;
static const std::string disconnect("disconnect");
if (size == disconnect.size() &&
strncmp(data, disconnect.data(), disconnect.size()) == 0)
{
if(session->getViewId() == _editorId) {
_editorId = -1;
}
LOG_DBG("Removing ChildSession [" << sessionId << "].");
// Tell them we're going quietly.
session->sendTextFrame("disconnected:");
_sessions.erase(it);
const std::size_t count = _sessions.size();
LOG_DBG("Have " << count << " child" << (count == 1 ? "" : "ren") <<
" after removing ChildSession [" << sessionId << "].");
// No longer needed, and allow session dtor to take it.
session.reset();
return true;
}
// No longer needed, and allow the handler to take it.
if (session)
{
std::vector<char> vect(size);
vect.assign(data, data + size);
// TODO this is probably wrong...
session->handleMessage(vect);
return true;
}
}
const std::string abbrMessage = getAbbreviatedMessage(data, size);
LOG_ERR("Child session [" << sessionId << "] not found to forward message: " << abbrMessage);
}
else
{
LOG_ERR("Failed to parse prefix of forward-to-child message: " << prefix);
}
return false;
}
template <typename T>
static Object::Ptr makePropertyValue(const std::string& type, const T& val)
{
Object::Ptr obj = new Object();
obj->set("type", type);
obj->set("value", val);
return obj;
}
static std::string makeRenderParams(const std::string& renderOpts, const std::string& userName, const std::string& spellOnline)
{
Object::Ptr renderOptsObj;
// Fill the object with renderoptions, if any
if (!renderOpts.empty())
{
Parser parser;
Poco::Dynamic::Var var = parser.parse(renderOpts);
renderOptsObj = var.extract<Object::Ptr>();
}
else
{
renderOptsObj = new Object();
}
// Append name of the user, if any, who opened the document to rendering options
if (!userName.empty())
{
// userName must be decoded already.
renderOptsObj->set(".uno:Author", makePropertyValue("string", userName));
}
// By default we enable spell-checking, unless it's disabled explicitly.
const bool bSet = (spellOnline != "false");
renderOptsObj->set(".uno:SpellOnline", makePropertyValue("boolean", bSet));
if (renderOptsObj)
{
std::ostringstream ossRenderOpts;
renderOptsObj->stringify(ossRenderOpts);
return ossRenderOpts.str();
}
return std::string();
}
public:
void enableProcessInput(bool enable = true){ _inputProcessingEnabled = enable; }
bool processInputEnabled() const { return _inputProcessingEnabled; }
bool hasQueueItems() const
{
return _tileQueue && !_tileQueue->isEmpty();
}
// poll is idle, are we ?
void checkIdle()
{
if (!processInputEnabled() || hasQueueItems())
{
LOG_TRC("Nearly idle - but have more queued items to process");
return; // more to do
}
sendTextFrame("idle");
// get rid of idle check for now.
ProcessToIdleDeadline = std::chrono::steady_clock::now() - std::chrono::milliseconds(10);
}
void drainQueue()
{
try
{
while (processInputEnabled() && hasQueueItems())
{
if (_stop || SigUtil::getTerminationFlag())
{
LOG_INF("_stop or TerminationFlag is set, breaking Document::drainQueue of loop");
break;
}
const TileQueue::Payload input = _tileQueue->pop();
LOG_TRC("Kit handling queue message: " << LOOLProtocol::getAbbreviatedMessage(input));
const StringVector tokens = Util::tokenize(input.data(), input.size());
if (tokens.equals(0, "eof"))
{
LOG_INF("Received EOF. Finishing.");
break;
}
if (tokens.equals(0, "tile"))
{
renderTile(tokens);
}
else if (tokens.equals(0, "tilecombine"))
{
renderCombinedTiles(tokens);
}
else if (Util::startsWith(tokens[0], "child-"))
{
forwardToChild(tokens[0], input);
}
else if (tokens.equals(0, "processtoidle"))
{
ProcessToIdleDeadline = std::chrono::steady_clock::now();
uint32_t timeoutUs = 0;
if (tokens.getUInt32(1, "timeout", timeoutUs))
ProcessToIdleDeadline += std::chrono::microseconds(timeoutUs);
}
else if (tokens.equals(0, "callback"))
{
if (tokens.size() >= 3)
{
bool broadcast = false;
int viewId = -1;
int exceptViewId = -1;
const std::string& target = tokens[1];
if (target == "all")
{
broadcast = true;
}
else if (LOOLProtocol::matchPrefix("except-", target))
{
exceptViewId = std::stoi(target.substr(7));
broadcast = true;
}
else
{
viewId = std::stoi(target);
}
const int type = std::stoi(tokens[2]);
// payload is the rest of the message
const std::size_t offset = tokens[0].length() + tokens[1].length()
+ tokens[2].length() + 3; // + delims
const std::string payload(input.data() + offset, input.size() - offset);
// Forward the callback to the same view, demultiplexing is done by the LibreOffice core.
bool isFound = false;
for (const auto& it : _sessions)
{
if (!it.second)
continue;
ChildSession& session = *it.second;
if ((broadcast && (session.getViewId() != exceptViewId))
|| (!broadcast && (session.getViewId() == viewId)))
{
if (!session.isCloseFrame())
{
isFound = true;
session.loKitCallback(type, payload);
}
else
{
LOG_ERR("Session-thread of session ["
<< session.getId() << "] for view [" << viewId
<< "] is not running. Dropping ["
<< lokCallbackTypeToString(type) << "] payload ["
<< payload << ']');
}
if (!broadcast)
{
break;
}
}
}
if (!isFound)
{
LOG_ERR("Document::ViewCallback. Session [" << viewId <<
"] is no longer active to process [" << lokCallbackTypeToString(type) <<
"] [" << payload << "] message to Master Session.");
}
}
else
{
LOG_ERR("Invalid callback message: [" << LOOLProtocol::getAbbreviatedMessage(input) << "].");
}
}
else
{
LOG_ERR("Unexpected request: [" << LOOLProtocol::getAbbreviatedMessage(input) << "].");
}
}
}
catch (const std::exception& exc)
{
LOG_FTL("drainQueue: Exception: " << exc.what());
#if !MOBILEAPP
flushTraceEventRecordings();
Log::shutdown();
std::_Exit(EX_SOFTWARE);
#endif
}
catch (...)
{
LOG_FTL("drainQueue: Unknown exception");
#if !MOBILEAPP
flushTraceEventRecordings();
Log::shutdown();
std::_Exit(EX_SOFTWARE);
#endif
}
}
private:
/// Return access to the lok::Office instance.
std::shared_ptr<lok::Office> getLOKit() override
{
return _loKit;
}
/// Return access to the lok::Document instance.
std::shared_ptr<lok::Document> getLOKitDocument() override
{
if (!_loKitDocument)
{
LOG_ERR("Document [" << _docKey << "] is not loaded.");
throw std::runtime_error("Document " + _docKey + " is not loaded.");
}
return _loKitDocument;
}
std::string getObfuscatedFileId() override
{
return _obfuscatedFileId;
}
void alertAllUsers(const std::string& msg)
{
sendTextFrame(msg);
}
public:
void dumpState(std::ostream& oss)
{
oss << "Kit Document:\n"
<< "\n\tstop: " << _stop
<< "\n\tjailId: " << _jailId
<< "\n\tdocKey: " << _docKey
<< "\n\tdocId: " << _docId
<< "\n\turl: " << _url
<< "\n\tobfuscatedFileId: " << _obfuscatedFileId
<< "\n\tjailedUrl: " << _jailedUrl
<< "\n\trenderOpts: " << _renderOpts
<< "\n\thaveDocPassword: " << _haveDocPassword // not the pwd itself
<< "\n\tisDocPasswordProtected: " << _isDocPasswordProtected
<< "\n\tdocPasswordType: " << (int)_docPasswordType
<< "\n\teditorId: " << _editorId
<< "\n\teditorChangeWarning: " << _editorChangeWarning
<< "\n\tmobileAppDocId: " << _mobileAppDocId
<< "\n\tinputProcessingEnabled: " << _inputProcessingEnabled
<< "\n";
// dumpState:
// TODO: _websocketHandler - but this is an odd one.
_tileQueue->dumpState(oss);
_pngCache.dumpState(oss);
oss << "\tviewIdToCallbackDescr:";
for (const auto &it : _viewIdToCallbackDescr)
{
oss << "\n\t\tviewId: " << it.first
<< " editorId: " << it.second->getDoc()->getEditorId()
<< " mobileAppDocId: " << it.second->getDoc()->getMobileAppDocId();
}
oss << "\n";
_pngPool.dumpState(oss);
_sessions.dumpState(oss);
oss << "\tlastUpdatedAt:";
for (const auto &it : _lastUpdatedAt)
{
auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
it.second.time_since_epoch()).count();
oss << "\n\t\tviewId: " << it.first
<< " last update time(ms): " << ms;
}
oss << "\n";
oss << "\tspeedCount:";
for (const auto &it : _speedCount)
{
oss << "\n\t\tviewId: " << it.first
<< " speed: " << it.second;
}
oss << "\n";
/// For showing disconnected user info in the doc repair dialog.
oss << "\tsessionUserInfo:";
for (const auto &it : _sessionUserInfo)
{
oss << "\n\t\tviewId: " << it.first
<< " userId: " << it.second.getUserId()
<< " userName: " << it.second.getUserName()
<< " userExtraInfo: " << it.second.getUserExtraInfo()
<< " readOnly: " << it.second.isReadOnly();
}
oss << "\n";
}
private:
std::shared_ptr<lok::Office> _loKit;
const std::string _jailId;
/// URL-based key. May be repeated during the lifetime of WSD.
const std::string _docKey;
/// Short numerical ID. Unique during the lifetime of WSD.
const std::string _docId;
const std::string _url;
const std::string _obfuscatedFileId;
std::string _jailedUrl;
std::string _renderOpts;
std::shared_ptr<lok::Document> _loKitDocument;
#ifdef __ANDROID__
static std::shared_ptr<lok::Document> _loKitDocumentForAndroidOnly;
#endif
std::shared_ptr<TileQueue> _tileQueue;
std::shared_ptr<WebSocketHandler> _websocketHandler;
PngCache _pngCache;
// Document password provided
std::string _docPassword;
// Whether password was provided or not
bool _haveDocPassword;
// Whether document is password protected
bool _isDocPasswordProtected;
// Whether password is required to view the document, or modify it
PasswordType _docPasswordType;
std::atomic<bool> _stop;
ThreadPool _pngPool;
std::condition_variable _cvLoading;
int _editorId;
bool _editorChangeWarning;
std::map<int, std::unique_ptr<CallbackDescriptor>> _viewIdToCallbackDescr;
SessionMap<ChildSession> _sessions;
std::map<int, std::chrono::steady_clock::time_point> _lastUpdatedAt;
std::map<int, int> _speedCount;
/// For showing disconnected user info in the doc repair dialog.
std::map<int, UserInfo> _sessionUserInfo;
#ifdef __ANDROID__
friend std::shared_ptr<lok::Document> getLOKDocumentForAndroidOnly();
#endif
const unsigned _mobileAppDocId;
bool _inputProcessingEnabled;
};
#if !defined FUZZER && !defined BUILDING_TESTS && !MOBILEAPP
// When building the fuzzer we link LOOLWSD.cpp into the same executable so the
// Protected::emitOneRecording() there gets used. When building the unit tests the one in
// TraceEvent.cpp gets used.
static constexpr int traceEventRecordingsCapacity = 100;
static std::vector<std::string> traceEventRecordings;
static void flushTraceEventRecordings()
{
if (traceEventRecordings.size() == 0)
return;
std::size_t totalLength = 0;
for (const auto& i: traceEventRecordings)
totalLength += i.length();
std::string recordings;
recordings.reserve(totalLength);
for (const auto& i: traceEventRecordings)
recordings += i;
singletonDocument->sendTextFrame("traceevent: \n" + recordings);
traceEventRecordings.clear();
}
// The checks for singletonDocument below are to catch if this gets called in the ForKit process.
void TraceEvent::emitOneRecordingIfEnabled(const std::string &recording)
{
// This can be called before the config system is initialized. Guard against that, as calling
// config::getBool() would cause an assertion failure.
static bool configChecked = false;
static bool traceEventsEnabled;
if (!configChecked && config::isInitialized())
{
traceEventsEnabled = config::getBool("trace_event[@enable]", false);
configChecked = true;
}
if (configChecked && !traceEventsEnabled)
return;
if (singletonDocument == nullptr)
return;
singletonDocument->sendTextFrame("forcedtraceevent: \n" + recording);
}
void TraceEvent::emitOneRecording(const std::string &recording)
{
static const bool traceEventsEnabled = config::getBool("trace_event[@enable]", false);
if (!traceEventsEnabled)
return;
if (!TraceEvent::isRecordingOn())
return;
if (singletonDocument == nullptr)
return;
if (traceEventRecordings.size() >= traceEventRecordingsCapacity)
flushTraceEventRecordings();
else if (traceEventRecordings.size() == 0 && traceEventRecordings.capacity() < traceEventRecordingsCapacity)
traceEventRecordings.reserve(traceEventRecordingsCapacity);
traceEventRecordings.emplace_back(recording + "\n");
}
#elif !MOBILEAPP
static void flushTraceEventRecordings()
{
}
#endif
#ifdef __ANDROID__
std::shared_ptr<lok::Document> Document::_loKitDocumentForAndroidOnly = std::shared_ptr<lok::Document>();
std::shared_ptr<lok::Document> getLOKDocumentForAndroidOnly()
{
return Document::_loKitDocumentForAndroidOnly;
}
#endif
class KitSocketPoll final : public SocketPoll
{
std::chrono::steady_clock::time_point _pollEnd;
std::shared_ptr<Document> _document;
static KitSocketPoll *mainPoll;
KitSocketPoll() :
SocketPoll("kit")
{
#ifdef IOS
terminationFlag = false;
#endif
mainPoll = this;
}
public:
~KitSocketPoll()
{
// Just to make it easier to set a breakpoint
mainPoll = nullptr;
}
static void dumpGlobalState(std::ostream &oss)
{
if (mainPoll)
{
if (!mainPoll->_document)
oss << "KitSocketPoll: no doc\n";
else
{
mainPoll->_document->dumpState(oss);
mainPoll->dumpState(oss);
}
}
else
oss << "KitSocketPoll: none\n";
}
static std::shared_ptr<KitSocketPoll> create()
{
KitSocketPoll *p = new KitSocketPoll();
auto result = std::shared_ptr<KitSocketPoll>(p);
#ifdef IOS
std::unique_lock<std::mutex> lock(KSPollsMutex);
KSPolls.push_back(result);
#endif
return result;
}
// process pending message-queue events.
void drainQueue()
{
SigUtil::checkDumpGlobalState(dump_kit_state);
if (_document)
_document->drainQueue();
}
// called from inside poll, inside a wakeup
void wakeupHook()
{
_pollEnd = std::chrono::steady_clock::now();
}
// a LOK compatible poll function merging the functions.
// returns the number of events signalled
int kitPoll(int timeoutMicroS)
{
if (SigUtil::getTerminationFlag())
{
LOG_TRC("Termination of unipoll mainloop flagged");
return -1;
}
// The maximum number of extra events to process beyond the first.
int maxExtraEvents = 15;
int eventsSignalled = 0;
auto startTime = std::chrono::steady_clock::now();
// handle processtoidle waiting optimization
bool checkForIdle = ProcessToIdleDeadline >= startTime;
if (timeoutMicroS < 0)
{
// Flush at most 1 + maxExtraEvents, or return when nothing left.
while (poll(std::chrono::microseconds::zero()) > 0 && maxExtraEvents-- > 0)
++eventsSignalled;
}
else
{
if (checkForIdle)
timeoutMicroS = 0;
// Flush at most maxEvents+1, or return when nothing left.
_pollEnd = startTime + std::chrono::microseconds(timeoutMicroS);
do
{
int realTimeout = timeoutMicroS;
if (_document && _document->hasQueueItems())
realTimeout = 0;
if (poll(std::chrono::microseconds(realTimeout)) <= 0)
break;
const auto now = std::chrono::steady_clock::now();
drainQueue();
timeoutMicroS = std::chrono::duration_cast<std::chrono::microseconds>(_pollEnd - now).count();
++eventsSignalled;
}
while (timeoutMicroS > 0 && !SigUtil::getTerminationFlag() && maxExtraEvents-- > 0);
}
if (_document && checkForIdle && eventsSignalled == 0 &&
timeoutMicroS > 0 && !hasCallbacks() && !hasBuffered())
{
auto remainingTime = ProcessToIdleDeadline - startTime;
LOG_TRC("Poll of " << timeoutMicroS << " vs. remaining time of: " <<
std::chrono::duration_cast<std::chrono::microseconds>(remainingTime).count());
// would we poll until then if we could ?
if (remainingTime < std::chrono::microseconds(timeoutMicroS))
_document->checkIdle();
else
LOG_TRC("Poll of woudl not close gap - continuing");
}
drainQueue();
#if !MOBILEAPP
if (_document && _document->purgeSessions() == 0)
{
LOG_INF("Last session discarded. Setting TerminationFlag");
SigUtil::setTerminationFlag();
return -1;
}
#endif
// Report the number of events we processed.
return eventsSignalled;
}
void setDocument(std::shared_ptr<Document> document)
{
_document = std::move(document);
}
// unusual LOK event from another thread, push into our loop to process.
static bool pushToMainThread(LibreOfficeKitCallback callback, int type, const char *p, void *data)
{
if (mainPoll && mainPoll->getThreadOwner() != std::this_thread::get_id())
{
LOG_TRC("Unusual push callback to main thread");
std::shared_ptr<std::string> pCopy;
if (p)
pCopy = std::make_shared<std::string>(p, strlen(p));
mainPoll->addCallback([=]{
LOG_TRC("Unusual process callback in main thread");
callback(type, pCopy ? pCopy->c_str() : nullptr, data);
});
return true;
}
return false;
}
#ifdef IOS
static std::mutex KSPollsMutex;
// static std::condition_variable KSPollsCV;
static std::vector<std::weak_ptr<KitSocketPoll>> KSPolls;
std::mutex terminationMutex;
std::condition_variable terminationCV;
bool terminationFlag;
#endif
};
KitSocketPoll *KitSocketPoll::mainPoll = nullptr;
bool pushToMainThread(LibreOfficeKitCallback cb, int type, const char *p, void *data)
{
return KitSocketPoll::pushToMainThread(cb, type, p, data);
}
#ifdef IOS
std::mutex KitSocketPoll::KSPollsMutex;
// std::condition_variable KitSocketPoll::KSPollsCV;
std::vector<std::weak_ptr<KitSocketPoll>> KitSocketPoll::KSPolls;
#endif
class KitWebSocketHandler final : public WebSocketHandler
{
std::shared_ptr<TileQueue> _queue;
std::string _socketName;
std::shared_ptr<lok::Office> _loKit;
std::string _jailId;
std::shared_ptr<Document> _document;
std::shared_ptr<KitSocketPoll> _ksPoll;
const unsigned _mobileAppDocId;
public:
KitWebSocketHandler(const std::string& socketName, const std::shared_ptr<lok::Office>& loKit, const std::string& jailId, std::shared_ptr<KitSocketPoll> ksPoll, unsigned mobileAppDocId) :
WebSocketHandler(/* isClient = */ true, /* isMasking */ false),
_queue(std::make_shared<TileQueue>()),
_socketName(socketName),
_loKit(loKit),
_jailId(jailId),
_ksPoll(ksPoll),
_mobileAppDocId(mobileAppDocId)
{
}
~KitWebSocketHandler()
{
// Just to make it easier to set a breakpoint
}
protected:
void handleMessage(const std::vector<char>& data) override
{
// To get A LOT of Trace Events, to exercide their handling, uncomment this:
// ProfileZone profileZone("KitWebSocketHandler::handleMessage");
std::string message(data.data(), data.size());
#if !MOBILEAPP
if (UnitKit::get().filterKitMessage(this, message))
return;
#endif
StringVector tokens = Util::tokenize(message);
Log::StreamLogger logger = Log::debug();
if (logger.enabled())
{
logger << _socketName << ": recv [";
for (const auto& token : tokens)
{
// Don't log user-data, there are anonymized versions that get logged instead.
if (Util::startsWith(tokens.getParam(token), "jail") ||
Util::startsWith(tokens.getParam(token), "author") ||
Util::startsWith(tokens.getParam(token), "name") ||
Util::startsWith(tokens.getParam(token), "url"))
continue;
logger << tokens.getParam(token) << ' ';
}
LOG_END(logger, true);
}
// Note: Syntax or parsing errors here are unexpected and fatal.
if (SigUtil::getTerminationFlag())
{
LOG_DBG("Too late, TerminationFlag is set, we're going down");
}
else if (tokens.equals(0, "session"))
{
const std::string& sessionId = tokens[1];
const std::string& docKey = tokens[2];
const std::string& docId = tokens[3];
const int canonicalViewId = std::stoi(tokens[4]);
const std::string fileId = Util::getFilenameFromURL(docKey);
Util::mapAnonymized(fileId, fileId); // Identity mapping, since fileId is already obfuscated
std::string url;
URI::decode(docKey, url);
LOG_INF("New session [" << sessionId << "] request on url [" << url << "] with viewId " << canonicalViewId);
#ifndef IOS
Util::setThreadName("kit" SHARED_DOC_THREADNAME_SUFFIX + docId);
#endif
if (!_document)
{
_document = std::make_shared<Document>(
_loKit, _jailId, docKey, docId, url, _queue,
std::static_pointer_cast<WebSocketHandler>(shared_from_this()),
_mobileAppDocId);
_ksPoll->setDocument(_document);
// We need to send the process name information to WSD if Trace Event recording is enabled (but
// not turned on) because it might be turned on later.
// We can do this only after creating the Document object.
TraceEvent::emitOneRecordingIfEnabled(std::string("{\"name\":\"process_name\",\"ph\":\"M\",\"args\":{\"name\":\"")
+ "Kit-" + docId
+ "\"},\"pid\":"
+ std::to_string(getpid())
+ ",\"tid\":"
+ std::to_string(Util::getThreadId())
+ "},\n");
}
// Validate and create session.
if (!(url == _document->getUrl() && _document->createSession(sessionId, canonicalViewId)))
{
LOG_DBG("CreateSession failed.");
}
}
else if (tokens.equals(0, "exit"))
{
#if !MOBILEAPP
LOG_INF("Terminating immediately due to parent 'exit' command.");
flushTraceEventRecordings();
Log::shutdown();
std::_Exit(EX_SOFTWARE);
#else
#ifdef IOS
LOG_INF("Setting our KitSocketPoll's termination flag due to 'exit' command.");
std::unique_lock<std::mutex> lock(_ksPoll->terminationMutex);
_ksPoll->terminationFlag = true;
_ksPoll->terminationCV.notify_all();
#else
LOG_INF("Setting TerminationFlag due to 'exit' command.");
SigUtil::setTerminationFlag();
#endif
_document.reset();
#endif
}
else if (tokens.equals(0, "tile") || tokens.equals(0, "tilecombine") || tokens.equals(0, "canceltiles") ||
tokens.equals(0, "paintwindow") || tokens.equals(0, "resizewindow") ||
LOOLProtocol::getFirstToken(tokens[0], '-') == "child")
{
if (_document)
{
_queue->put(message);
}
else
{
LOG_WRN("No document while processing " << tokens[0] << " request.");
}
}
else if (tokens.size() == 3 && tokens.equals(0, "setconfig"))
{
#if !MOBILEAPP
// Currently only rlimit entries are supported.
if (!Rlimit::handleSetrlimitCommand(tokens))
{
LOG_ERR("Unknown setconfig command: " << message);
}
#endif
}
else if (tokens.equals(0, "setloglevel"))
{
Log::logger().setLevel(tokens[1]);
}
else
{
LOG_ERR("Bad or unknown token [" << tokens[0] << ']');
}
}
virtual void enableProcessInput(bool enable = true) override
{
WebSocketHandler::enableProcessInput(enable);
if (_document)
_document->enableProcessInput(enable);
// Wake up poll to process data from socket input buffer
if (enable && _ksPoll)
{
_ksPoll->wakeup();
}
}
void onDisconnect() override
{
#if !MOBILEAPP
LOG_ERR("Kit connection lost without exit arriving from wsd. Setting TerminationFlag");
SigUtil::setTerminationFlag();
#endif
#ifdef IOS
{
std::unique_lock<std::mutex> lock(_ksPoll->terminationMutex);
_ksPoll->terminationFlag = true;
_ksPoll->terminationCV.notify_all();
}
#endif
_ksPoll.reset();
}
};
void documentViewCallback(const int type, const char* payload, void* data)
{
Document::ViewCallback(type, payload, data);
}
/// Called by LOK main-loop the central location for data processing.
int pollCallback(void* pData, int timeoutUs)
{
#ifndef IOS
if (!pData)
return 0;
else
return reinterpret_cast<KitSocketPoll*>(pData)->kitPoll(timeoutUs);
#else
std::unique_lock<std::mutex> lock(KitSocketPoll::KSPollsMutex);
std::vector<std::shared_ptr<KitSocketPoll>> v;
for (const auto &i : KitSocketPoll::KSPolls)
{
auto p = i.lock();
if (p)
v.push_back(p);
}
lock.unlock();
if (v.size() == 0)
{
std::this_thread::sleep_for(std::chrono::microseconds(timeoutUs));
}
else
{
for (const auto &p : v)
p->kitPoll(timeoutUs);
}
// We never want to exit the main loop
return 0;
#endif
}
/// Called by LOK main-loop
void wakeCallback(void* pData)
{
#ifndef IOS
if (!pData)
return;
else
return reinterpret_cast<KitSocketPoll*>(pData)->wakeup();
#else
std::unique_lock<std::mutex> lock(KitSocketPoll::KSPollsMutex);
if (KitSocketPoll::KSPolls.size() == 0)
return;
std::vector<std::shared_ptr<KitSocketPoll>> v;
for (const auto &i : KitSocketPoll::KSPolls)
{
auto p = i.lock();
if (p)
v.push_back(p);
}
lock.unlock();
for (const auto &p : v)
p->wakeup();
#endif
}
#ifndef BUILDING_TESTS
void lokit_main(
#if !MOBILEAPP
const std::string& childRoot,
const std::string& jailId,
const std::string& sysTemplate,
const std::string& loTemplate,
const std::string& loSubPath,
bool noCapabilities,
bool noSeccomp,
bool queryVersion,
bool displayVersion,
#else
int docBrokerSocket,
const std::string& userInterface,
#endif
std::size_t numericIdentifier
)
{
#if !MOBILEAPP
#ifndef FUZZER
SigUtil::setFatalSignals("kit startup of " LOOLWSD_VERSION " " LOOLWSD_VERSION_HASH);
SigUtil::setTerminationSignals();
#endif
Util::setThreadName("kit_spare_" + Util::encodeId(numericIdentifier, 3));
// Reinitialize logging when forked.
const bool logToFile = std::getenv("LOOL_LOGFILE");
const char* logFilename = std::getenv("LOOL_LOGFILENAME");
const char* logLevel = std::getenv("LOOL_LOGLEVEL");
const bool logColor = config::getBool("logging.color", true) && isatty(fileno(stderr));
std::map<std::string, std::string> logProperties;
if (logToFile && logFilename)
{
logProperties["path"] = std::string(logFilename);
}
Util::rng::reseed();
const std::string LogLevel = logLevel ? logLevel : "trace";
const bool bTraceStartup = (std::getenv("LOOL_TRACE_STARTUP") != nullptr);
Log::initialize("kit", bTraceStartup ? "trace" : logLevel, logColor, logToFile, logProperties);
if (bTraceStartup && LogLevel != "trace")
{
LOG_INF("Setting log-level to [trace] and delaying setting to configured [" << LogLevel << "] until after Kit initialization.");
}
const char* pAnonymizationSalt = std::getenv("LOOL_ANONYMIZATION_SALT");
if (pAnonymizationSalt)
{
AnonymizationSalt = std::stoull(std::string(pAnonymizationSalt));
AnonymizeUserData = true;
}
LOG_INF("User-data anonymization is " << (AnonymizeUserData ? "enabled." : "disabled."));
assert(!childRoot.empty());
assert(!sysTemplate.empty());
assert(!loTemplate.empty());
assert(!loSubPath.empty());
LOG_INF("Kit process for Jail [" << jailId << "] started.");
std::string userdir_url;
std::string instdir_path;
int ProcSMapsFile = -1;
// lokit's destroy typically throws from
// framework/source/services/modulemanager.cxx:198
// So we insure it lives until std::_Exit is called.
std::shared_ptr<lok::Office> loKit;
ChildSession::NoCapsForKit = noCapabilities;
#endif // MOBILEAPP
try
{
#if !MOBILEAPP
const Path jailPath = Path::forDirectory(childRoot + '/' + jailId);
const std::string jailPathStr = jailPath.toString();
LOG_INF("Jail path: " << jailPathStr);
File(jailPath).createDirectories();
chmod(jailPathStr.c_str(), S_IXUSR | S_IWUSR | S_IRUSR);
if (!ChildSession::NoCapsForKit)
{
std::chrono::time_point<std::chrono::steady_clock> jailSetupStartTime
= std::chrono::steady_clock::now();
userdir_url = "file:///tmp/user";
instdir_path = '/' + loSubPath + "/program";
Poco::Path jailLOInstallation(jailPath, loSubPath);
jailLOInstallation.makeDirectory();
const std::string loJailDestPath = jailLOInstallation.toString();
// The bind-mount implementation: inlined here to mirror
// the fallback link/copy version bellow.
const auto mountJail = [&]() -> bool {
// Mount sysTemplate for the jail directory.
LOG_INF("Mounting " << sysTemplate << " -> " << jailPathStr);
if (!JailUtil::bind(sysTemplate, jailPathStr)
|| !JailUtil::remountReadonly(sysTemplate, jailPathStr))
{
LOG_ERR("Failed to mount [" << sysTemplate << "] -> [" << jailPathStr
<< "], will link/copy contents.");
return false;
}
// Mount loTemplate inside it.
LOG_INF("Mounting " << loTemplate << " -> " << loJailDestPath);
Poco::File(loJailDestPath).createDirectories();
if (!JailUtil::bind(loTemplate, loJailDestPath)
|| !JailUtil::remountReadonly(loTemplate, loJailDestPath))
{
LOG_WRN("Failed to mount [" << loTemplate << "] -> [" << loJailDestPath
<< "], will link/copy contents.");
return false;
}
// Hard-random tmpdir inside the jail for added sercurity.
const std::string tempRoot = Poco::Path(childRoot, "tmp").toString();
Poco::File(tempRoot).createDirectories();
const std::string tmpSubDir = FileUtil::createRandomTmpDir(tempRoot);
const std::string jailTmpDir = Poco::Path(jailPath, "tmp").toString();
LOG_INF("Mounting random temp dir " << tmpSubDir << " -> " << jailTmpDir);
if (!JailUtil::bind(tmpSubDir, jailTmpDir))
{
LOG_ERR("Failed to mount [" << tmpSubDir << "] -> [" << jailTmpDir
<< "], will link/copy contents.");
return false;
}
return true;
};
// Copy (link) LO installation and other necessary files into it from the template.
bool bindMount = JailUtil::isBindMountingEnabled();
if (bindMount)
{
if (!mountJail())
{
LOG_INF("Cleaning up jail before linking/copying.");
JailUtil::removeJail(jailPathStr);
bindMount = false;
JailUtil::disableBindMounting();
}
}
if (!bindMount)
{
LOG_INF("Mounting is disabled, will link/copy " << sysTemplate << " -> "
<< jailPathStr);
const std::string linkablePath = childRoot + "/linkable";
linkOrCopy(sysTemplate, jailPath, linkablePath, LinkOrCopyType::All);
linkOrCopy(loTemplate, loJailDestPath, linkablePath, LinkOrCopyType::LO);
// Update the dynamic files inside the jail.
if (!JailUtil::SysTemplate::updateDynamicFiles(jailPathStr))
{
LOG_ERR(
"Failed to update the dynamic files in the jail ["
<< jailPathStr
<< "]. If the systemplate directory is owned by a superuser or is "
"read-only, running the installation scripts with the owner's account "
"should update these files. Some functionality may be missing.");
}
// Create a file to mark this a copied jail.
JailUtil::markJailCopied(jailPathStr);
}
// Setup the devices inside /tmp and set TMPDIR.
JailUtil::setupJailDevNodes(Poco::Path(jailPath, "/tmp").toString());
::setenv("TMPDIR", "/tmp", 1);
// HOME must be writable, so create it in /tmp.
constexpr const char* HomePathInJail = "/tmp/home";
Poco::File(Poco::Path(jailPath, HomePathInJail)).createDirectories();
::setenv("HOME", HomePathInJail, 1);
const auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::steady_clock::now() - jailSetupStartTime);
LOG_DBG("Initialized jail files in " << ms);
ProcSMapsFile = open("/proc/self/smaps", O_RDONLY);
if (ProcSMapsFile < 0)
LOG_SYS("Failed to open /proc/self/smaps. Memory stats will be missing.");
LOG_INF("chroot(\"" << jailPathStr << "\")");
if (chroot(jailPathStr.c_str()) == -1)
{
LOG_SFL("chroot(\"" << jailPathStr << "\") failed");
Log::shutdown();
std::_Exit(EX_SOFTWARE);
}
if (chdir("/") == -1)
{
LOG_SFL("chdir(\"/\") in jail failed");
Log::shutdown();
std::_Exit(EX_SOFTWARE);
}
#ifndef __FreeBSD__
dropCapability(CAP_SYS_CHROOT);
dropCapability(CAP_MKNOD);
dropCapability(CAP_FOWNER);
dropCapability(CAP_CHOWN);
#else
cap_enter();
#endif
LOG_DBG("Initialized jail nodes, dropped caps.");
}
else // noCapabilities set
{
LOG_WRN("Security warning: running without chroot jails is insecure.");
LOG_INF("Using template ["
<< loTemplate << "] as install subpath directly, without chroot jail setup.");
userdir_url = "file:///" + jailPathStr + "/tmp/user";
instdir_path = '/' + loTemplate + "/program";
JailRoot = jailPathStr;
}
LOG_DBG("Initializing LOK with instdir [" << instdir_path << "] and userdir ["
<< userdir_url << "].");
LibreOfficeKit *kit;
{
const char *instdir = instdir_path.c_str();
const char *userdir = userdir_url.c_str();
#ifndef KIT_IN_PROCESS
kit = UnitKit::get().lok_init(instdir, userdir);
#else
kit = nullptr;
#ifdef FUZZER
if (LOOLWSD::DummyLOK)
kit = dummy_lok_init_2(instdir, userdir);
#endif
#endif
if (!kit)
{
kit = (initFunction ? initFunction(instdir, userdir)
: lok_init_2(instdir, userdir));
}
loKit = std::make_shared<lok::Office>(kit);
if (!loKit)
{
LOG_FTL("LibreOfficeKit initialization failed. Exiting.");
Log::shutdown();
std::_Exit(EX_SOFTWARE);
}
}
// Lock down the syscalls that can be used
if (!Seccomp::lockdown(Seccomp::Type::KIT))
{
if (!noSeccomp)
{
LOG_FTL("LibreOfficeKit seccomp security lockdown failed. Exiting.");
Log::shutdown();
std::_Exit(EX_SOFTWARE);
}
LOG_ERR("LibreOfficeKit seccomp security lockdown failed, but configured to continue. "
"You are running in a significantly less secure mode.");
}
rlimit rlim = { 0, 0 };
if (getrlimit(RLIMIT_AS, &rlim) == 0)
LOG_INF("RLIMIT_AS is " << Util::getHumanizedBytes(rlim.rlim_max) << " (" << rlim.rlim_max << " bytes)");
else
LOG_SYS("Failed to get RLIMIT_AS");
if (getrlimit(RLIMIT_STACK, &rlim) == 0)
LOG_INF("RLIMIT_STACK is " << Util::getHumanizedBytes(rlim.rlim_max) << " (" << rlim.rlim_max << " bytes)");
else
LOG_SYS("Failed to get RLIMIT_STACK");
if (getrlimit(RLIMIT_FSIZE, &rlim) == 0)
LOG_INF("RLIMIT_FSIZE is " << Util::getHumanizedBytes(rlim.rlim_max) << " (" << rlim.rlim_max << " bytes)");
else
LOG_SYS("Failed to get RLIMIT_FSIZE");
if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
LOG_INF("RLIMIT_NOFILE is " << rlim.rlim_max << " files.");
else
LOG_SYS("Failed to get RLIMIT_NOFILE");
LOG_INF("Kit process for Jail [" << jailId << "] is ready.");
std::string pathAndQuery(NEW_CHILD_URI);
pathAndQuery.append("?jailid=");
pathAndQuery.append(jailId);
if (queryVersion)
{
char* versionInfo = loKit->getVersionInfo();
std::string versionString(versionInfo);
if (displayVersion)
std::cout << "office version details: " << versionString << std::endl;
SigUtil::setVersionInfo(versionString);
// Add some parameters we want to pass to the client. Could not figure out how to get
// the configuration parameters from LOOLWSD.cpp's initialize() or loolwsd.xml here, so
// oh well, just have the value hardcoded in KitHelper.hpp. It isn't really useful to
// "tune" it at end-user installations anyway, I think.
auto versionJSON = Poco::JSON::Parser().parse(versionString).extract<Poco::JSON::Object::Ptr>();
versionJSON->set("tunnelled_dialog_image_cache_size", std::to_string(LOKitHelper::tunnelledDialogImageCacheSize));
std::stringstream ss;
versionJSON->stringify(ss);
versionString = ss.str();
std::string encodedVersion;
Poco::URI::encode(versionString, "?#/", encodedVersion);
pathAndQuery.append("&version=");
pathAndQuery.append(encodedVersion);
free(versionInfo);
}
#else // MOBILEAPP
#ifndef IOS
// Was not done by the preload.
// For iOS we call it in -[AppDelegate application: didFinishLaunchingWithOptions:]
setupKitEnvironment(userInterface);
#endif
#if (defined(__linux__) && !defined(__ANDROID__)) || defined(__FreeBSD__)
Poco::URI userInstallationURI("file", LO_PATH);
LibreOfficeKit *kit = lok_init_2(LO_PATH "/program", userInstallationURI.toString().c_str());
#else
#ifdef IOS // In the iOS app we call lok_init_2() just once, when the app starts
static LibreOfficeKit *kit = lo_kit;
#else
static LibreOfficeKit *kit = lok_init_2(nullptr, nullptr);
#endif
#endif
assert(kit);
static std::shared_ptr<lok::Office> loKit = std::make_shared<lok::Office>(kit);
assert(loKit);
LOOLWSD::LOKitVersion = loKit->getVersionInfo();
// Dummies
const std::string jailId = "jailid";
#endif // MOBILEAPP
auto mainKit = KitSocketPoll::create();
mainKit->runOnClientThread(); // We will do the polling on this thread.
std::shared_ptr<KitWebSocketHandler> websocketHandler =
std::make_shared<KitWebSocketHandler>("child_ws", loKit, jailId, mainKit, numericIdentifier);
#if !MOBILEAPP
mainKit->insertNewUnixSocket(MasterLocation, pathAndQuery, websocketHandler, ProcSMapsFile);
#else
mainKit->insertNewFakeSocket(docBrokerSocket, websocketHandler);
#endif
LOG_INF("New kit client websocket inserted.");
#if !MOBILEAPP
if (bTraceStartup && LogLevel != "trace")
{
LOG_INF("Kit initialization complete: setting log-level to [" << LogLevel << "] as configured.");
Log::logger().setLevel(LogLevel);
}
#endif
#ifndef IOS
if (!LIBREOFFICEKIT_HAS(kit, runLoop))
{
LOG_FTL("Kit is missing Unipoll API");
std::cout << "Fatal: out of date LibreOfficeKit - no Unipoll API\n";
std::_Exit(EX_SOFTWARE);
}
LOG_INF("Kit unipoll loop run");
loKit->runLoop(pollCallback, wakeCallback, mainKit.get());
LOG_INF("Kit unipoll loop run terminated.");
#if MOBILEAPP
SocketPoll::wakeupWorld();
#else
// Trap the signal handler, if invoked,
// to prevent exiting.
LOG_INF("Kit process for Jail [" << jailId << "] finished.");
Log::shutdown();
// Let forkit handle the jail cleanup.
#endif
#else // IOS
std::unique_lock<std::mutex> lock(mainKit->terminationMutex);
mainKit->terminationCV.wait(lock,[&]{ return mainKit->terminationFlag; } );
#endif // !IOS
}
catch (const Exception& exc)
{
LOG_ERR("Poco Exception: " << exc.displayText() <<
(exc.nested() ? " (" + exc.nested()->displayText() + ')' : ""));
}
catch (const std::exception& exc)
{
LOG_ERR("Exception: " << exc.what());
}
#if !MOBILEAPP
LOG_INF("Kit process for Jail [" << jailId << "] finished.");
flushTraceEventRecordings();
Log::shutdown();
// Wait for the signal handler, if invoked, to prevent exiting until done.
SigUtil::waitSigHandlerTrap();
std::_Exit(EX_OK);
#endif
}
#ifdef IOS
// In the iOS app we can have several documents open in the app process at the same time, thus
// several lokit_main() functions running at the same time. We want just one LO main loop, though,
// so we start it separately in its own thread.
void runKitLoopInAThread()
{
std::thread([&]
{
Util::setThreadName("lokit_runloop");
std::shared_ptr<lok::Office> loKit = std::make_shared<lok::Office>(lo_kit);
int dummy;
loKit->runLoop(pollCallback, wakeCallback, &dummy);
// Should never return
assert(false);
NSLog(@"loKit->runLoop() unexpectedly returned");
std::abort();
}).detach();
}
#endif // IOS
#endif // !BUILDING_TESTS
std::string anonymizeUrl(const std::string& url)
{
#ifndef BUILDING_TESTS
return AnonymizeUserData ? Util::anonymizeUrl(url, AnonymizationSalt) : url;
#else
return url;
#endif
}
#if !MOBILEAPP
/// Initializes LibreOfficeKit for cross-fork re-use.
bool globalPreinit(const std::string &loTemplate)
{
#ifdef FUZZER
if (LOOLWSD::DummyLOK)
return true;
#endif
const std::string libSofficeapp = loTemplate + "/program/" LIB_SOFFICEAPP;
const std::string libMerged = loTemplate + "/program/" LIB_MERGED;
std::string loadedLibrary;
void *handle;
if (File(libMerged).exists())
{
LOG_TRC("dlopen(" << libMerged << ", RTLD_GLOBAL|RTLD_NOW)");
handle = dlopen(libMerged.c_str(), RTLD_GLOBAL|RTLD_NOW);
if (!handle)
{
LOG_FTL("Failed to load " << libMerged << ": " << dlerror());
return false;
}
loadedLibrary = libMerged;
}
else
{
if (File(libSofficeapp).exists())
{
LOG_TRC("dlopen(" << libSofficeapp << ", RTLD_GLOBAL|RTLD_NOW)");
handle = dlopen(libSofficeapp.c_str(), RTLD_GLOBAL|RTLD_NOW);
if (!handle)
{
LOG_FTL("Failed to load " << libSofficeapp << ": " << dlerror());
return false;
}
loadedLibrary = libSofficeapp;
}
else
{
LOG_FTL("Neither " << libSofficeapp << " or " << libMerged << " exist.");
return false;
}
}
LokHookPreInit* preInit = reinterpret_cast<LokHookPreInit *>(dlsym(handle, "lok_preinit"));
if (!preInit)
{
LOG_FTL("No lok_preinit symbol in " << loadedLibrary << ": " << dlerror());
return false;
}
initFunction = reinterpret_cast<LokHookFunction2 *>(dlsym(handle, "libreofficekit_hook_2"));
if (!initFunction)
{
LOG_FTL("No libreofficekit_hook_2 symbol in " << loadedLibrary << ": " << dlerror());
}
// Disable problematic components that may be present from a
// desktop or developer's install if env. var not set.
::setenv("UNODISABLELIBRARY",
"abp avmediagst avmediavlc cmdmail losessioninstall OGLTrans PresenterScreen "
"syssh ucpftp1 ucpgio1 ucphier1 ucpimage updatecheckui updatefeed updchk"
// Database
"dbaxml dbmm dbp dbu deployment firebird_sdbc mork "
"mysql mysqlc odbc postgresql-sdbc postgresql-sdbc-impl sdbc2 sdbt"
// Java
"javaloader javavm jdbc rpt rptui rptxml ",
0 /* no overwrite */);
LOG_TRC("Invoking lok_preinit(" << loTemplate << "/program\", \"file:///tmp/user\")");
const auto start = std::chrono::steady_clock::now();
if (preInit((loTemplate + "/program").c_str(), "file:///tmp/user") != 0)
{
LOG_FTL("lok_preinit() in " << loadedLibrary << " failed");
return false;
}
LOG_TRC("Finished lok_preinit(" << loTemplate << "/program\", \"file:///tmp/user\") in "
<< std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::steady_clock::now() - start));
return true;
}
/// Anonymize usernames.
std::string anonymizeUsername(const std::string& username)
{
#ifndef BUILDING_TESTS
return AnonymizeUserData ? Util::anonymize(username, AnonymizationSalt) : username;
#else
return username;
#endif
}
#endif // !MOBILEAPP
void dump_kit_state()
{
std::ostringstream oss;
KitSocketPoll::dumpGlobalState(oss);
const std::string msg = oss.str();
fprintf(stderr, "%s", msg.c_str());
LOG_TRC(msg);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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