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83d1e311c9
mumble/src/murmur/Server.cpp
Robert Adam 83d1e311c9 FIX(server): Update suppress state on ACL change 
The suppress state of a user represents whether the user is currently in
a channel in which they don't have the Speak ACL. As of now this state
is only updated whenever the user switches channel.

However, the suppress state should also change, if the ACL for a given
channel change. This is what the current commit does. If this is not
done, a user will be able to continue speaking in a channel where they
should not be able to and only if they leave and re-join the channel
will the new ACL take effect.

To avoid such a situation, the current code updates the suppress state
every time the ACL change.

Fixes #5264
2022-07-31 20:52:19 +02:00

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// Copyright 2007-2022 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#include "Server.h"
#include "ACL.h"
#include "Channel.h"
#include "Connection.h"
#include "EnvUtils.h"
#include "Group.h"
#include "HTMLFilter.h"
#include "HostAddress.h"
#include "Meta.h"
#include "MumbleProtocol.h"
#include "QtUtils.h"
#include "ServerDB.h"
#include "ServerUser.h"
#include "User.h"
#include "Version.h"
#ifdef USE_ZEROCONF
# include "Zeroconf.h"
#endif
#include "Utils.h"
#include <QtCore/QCoreApplication>
#include <QtCore/QSet>
#include <QtCore/QXmlStreamAttributes>
#include <QtCore/QtEndian>
#include <QtNetwork/QHostInfo>
#include <QtNetwork/QSslConfiguration>
#include <boost/bind/bind.hpp>
#include "TracyConstants.h"
#include <Tracy.hpp>
#include <TracyC.h>
#include <algorithm>
#include <vector>
#ifdef Q_OS_WIN
# include <qos2.h>
# include <ws2tcpip.h>
#else
# include <netinet/in.h>
# include <poll.h>
#endif
ExecEvent::ExecEvent(boost::function< void() > f) : QEvent(static_cast< QEvent::Type >(EXEC_QEVENT)) {
func = f;
}
void ExecEvent::execute() {
func();
}
SslServer::SslServer(QObject *p) : QTcpServer(p) {
}
void SslServer::incomingConnection(qintptr v) {
QSslSocket *s = new QSslSocket(this);
s->setSocketDescriptor(v);
qlSockets.append(s);
}
QSslSocket *SslServer::nextPendingSSLConnection() {
if (qlSockets.isEmpty())
return nullptr;
return qlSockets.takeFirst();
}
Server::Server(int snum, QObject *p) : QThread(p) {
tracy::SetThreadName("Main");
bValid = true;
iServerNum = snum;
#ifdef USE_ZEROCONF
zeroconf = nullptr;
#endif
bUsingMetaCert = false;
#ifdef Q_OS_UNIX
aiNotify[0] = aiNotify[1] = -1;
#else
hNotify = nullptr;
#endif
qtTimeout = new QTimer(this);
iCodecAlpha = iCodecBeta = 0;
bPreferAlpha = false;
bOpus = true;
qnamNetwork = nullptr;
readParams();
initialize();
foreach (const QHostAddress &qha, qlBind) {
SslServer *ss = new SslServer(this);
connect(ss, SIGNAL(newConnection()), this, SLOT(newClient()), Qt::QueuedConnection);
if (!ss->listen(qha, usPort)) {
log(QString("Server: TCP Listen on %1 failed: %2").arg(addressToString(qha, usPort), ss->errorString()));
bValid = false;
} else {
log(QString("Server listening on %1").arg(addressToString(qha, usPort)));
}
qlServer << ss;
}
if (!bValid)
return;
foreach (SslServer *ss, qlServer) {
sockaddr_storage addr;
#ifdef Q_OS_UNIX
int tcpsock = static_cast< int >(ss->socketDescriptor());
socklen_t len = sizeof(addr);
#else
SOCKET tcpsock = ss->socketDescriptor();
int len = sizeof(addr);
#endif
memset(&addr, 0, sizeof(addr));
getsockname(tcpsock, reinterpret_cast< struct sockaddr * >(&addr), &len);
#ifdef Q_OS_UNIX
int sock = ::socket(addr.ss_family, SOCK_DGRAM, 0);
# ifdef Q_OS_LINUX
int sockopt = 1;
if (setsockopt(sock, IPPROTO_IP, IP_PKTINFO, &sockopt, sizeof(sockopt)))
log(QString("Failed to set IP_PKTINFO for %1").arg(addressToString(ss->serverAddress(), usPort)));
sockopt = 1;
if (setsockopt(sock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &sockopt, sizeof(sockopt)))
log(QString("Failed to set IPV6_RECVPKTINFO for %1").arg(addressToString(ss->serverAddress(), usPort)));
# endif
#else
# ifndef SIO_UDP_CONNRESET
# define SIO_UDP_CONNRESET _WSAIOW(IOC_VENDOR, 12)
# endif
SOCKET sock = ::WSASocket(addr.ss_family, SOCK_DGRAM, IPPROTO_UDP, nullptr, 0, WSA_FLAG_OVERLAPPED);
DWORD dwBytesReturned = 0;
BOOL bNewBehaviour = FALSE;
if (WSAIoctl(sock, SIO_UDP_CONNRESET, &bNewBehaviour, sizeof(bNewBehaviour), nullptr, 0, &dwBytesReturned,
nullptr, nullptr)
== SOCKET_ERROR) {
log(QString("Failed to set SIO_UDP_CONNRESET: %1").arg(WSAGetLastError()));
}
#endif
if (sock == INVALID_SOCKET) {
log("Failed to create UDP Socket");
bValid = false;
return;
} else {
if (addr.ss_family == AF_INET6) {
// Copy IPV6_V6ONLY attribute from tcp socket, it defaults to nonzero on Windows
// See https://msdn.microsoft.com/en-us/library/windows/desktop/ms738574%28v=vs.85%29.aspx
// This will fail for WindowsXP which is ok. Our TCP code will have split that up
// into two sockets.
int ipv6only = 0;
socklen_t optlen = sizeof(ipv6only);
if (::getsockopt(tcpsock, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast< char * >(&ipv6only), &optlen)
== 0) {
if (::setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast< const char * >(&ipv6only),
optlen)
== SOCKET_ERROR) {
log(QString("Failed to copy IPV6_V6ONLY socket attribute from tcp to udp socket"));
}
}
}
if (::bind(sock, reinterpret_cast< sockaddr * >(&addr), len) == SOCKET_ERROR) {
log(QString("Failed to bind UDP Socket to %1").arg(addressToString(ss->serverAddress(), usPort)));
} else {
#ifdef Q_OS_UNIX
int val = 0xe0;
if (setsockopt(sock, IPPROTO_IP, IP_TOS, &val, sizeof(val))) {
val = 0x80;
if (setsockopt(sock, IPPROTO_IP, IP_TOS, &val, sizeof(val)))
log("Server: Failed to set TOS for UDP Socket");
}
# if defined(SO_PRIORITY)
socklen_t optlen = sizeof(val);
if (getsockopt(sock, SOL_SOCKET, SO_PRIORITY, &val, &optlen) == 0) {
if (val == 0) {
val = 6;
setsockopt(sock, SOL_SOCKET, SO_PRIORITY, &val, sizeof(val));
}
}
# endif
#endif
}
QSocketNotifier *qsn = new QSocketNotifier(sock, QSocketNotifier::Read, this);
connect(qsn, SIGNAL(activated(int)), this, SLOT(udpActivated(int)));
qlUdpSocket << sock;
qlUdpNotifier << qsn;
}
}
bValid = bValid && (qlServer.count() == qlBind.count()) && (qlUdpSocket.count() == qlBind.count());
if (!bValid)
return;
#ifdef Q_OS_UNIX
if (socketpair(AF_UNIX, SOCK_STREAM, 0, aiNotify) != 0) {
log("Failed to create notify socket");
bValid = false;
return;
}
#else
hNotify = CreateEvent(nullptr, FALSE, FALSE, nullptr);
#endif
connect(this, SIGNAL(tcpTransmit(QByteArray, unsigned int)), this, SLOT(tcpTransmitData(QByteArray, unsigned int)),
Qt::QueuedConnection);
connect(this, SIGNAL(reqSync(unsigned int)), this, SLOT(doSync(unsigned int)));
for (int i = 1; i < iMaxUsers * 2; ++i)
qqIds.enqueue(i);
connect(qtTimeout, SIGNAL(timeout()), this, SLOT(checkTimeout()));
getBans();
readChannels();
readLinks();
initializeCert();
int major, minor, patch;
QString release;
Meta::getVersion(major, minor, patch, release);
m_versionBlob = Version::toRaw(major, minor, patch);
if (bValid) {
#ifdef USE_ZEROCONF
if (bBonjour)
initZeroconf();
#endif
initRegister();
}
}
void Server::startThread() {
if (!isRunning()) {
log("Starting voice thread");
bRunning = true;
foreach (QSocketNotifier *qsn, qlUdpNotifier)
qsn->setEnabled(false);
start(QThread::HighestPriority);
#ifdef Q_OS_LINUX
// QThread::HighestPriority == Same as everything else...
int policy;
struct sched_param param;
if (pthread_getschedparam(pthread_self(), &policy, &param) == 0) {
if (policy == SCHED_OTHER) {
policy = SCHED_FIFO;
param.sched_priority = 1;
pthread_setschedparam(pthread_self(), policy, &param);
}
}
#endif
}
if (!qtTimeout->isActive())
qtTimeout->start(15500);
}
void Server::stopThread() {
bRunning = false;
if (isRunning()) {
log("Ending voice thread");
#ifdef Q_OS_UNIX
unsigned char val = 0;
if (::write(aiNotify[1], &val, 1) != 1)
log("Failed to signal voice thread");
#else
SetEvent(hNotify);
#endif
wait();
foreach (QSocketNotifier *qsn, qlUdpNotifier)
qsn->setEnabled(true);
}
qtTimeout->stop();
}
Server::~Server() {
#ifdef USE_ZEROCONF
removeZeroconf();
#endif
stopThread();
foreach (QSocketNotifier *qsn, qlUdpNotifier)
delete qsn;
#ifdef Q_OS_UNIX
foreach (int s, qlUdpSocket)
close(s);
if (aiNotify[0] >= 0)
close(aiNotify[0]);
if (aiNotify[1] >= 0)
close(aiNotify[1]);
#else
foreach (SOCKET s, qlUdpSocket)
closesocket(s);
if (hNotify)
CloseHandle(hNotify);
#endif
clearACLCache();
log("Stopped");
}
/// normalizeSuggestVersion normalizes a 'suggestversion' config value.
/// The config value may be a version string, or a bitmasked
/// integer representing the version.
/// This function converts the 'suggestversion' config value to
/// always be a bitmasked integer representation.
///
/// On error, the function returns an empty QVariant.
static QVariant normalizeSuggestVersion(QVariant suggestVersion) {
uint integerValue = suggestVersion.toUInt();
// If the integer value is 0, it can mean two things:
//
// Either the suggestversion is set to 0.
// Or, the suggestversion is a version string such as "1.3.0",
// and cannot be converted to an integer value.
//
// We handle both cases the same: by pretending the
// suggestversion is a version string in both cases.
//
// If it is a version string, the call to Version::getRaw()
// will return the bitmasked representation.
//
// If it is not a version string, the call to Version::getRaw()
// will return 0, so it is effectively a no-op.
if (integerValue == 0) {
integerValue = Version::getRaw(suggestVersion.toString());
}
if (integerValue != 0) {
return integerValue;
}
return QVariant();
}
void Server::readParams() {
qsPassword = Meta::mp.qsPassword;
usPort = static_cast< unsigned short >(Meta::mp.usPort + iServerNum - 1);
iTimeout = Meta::mp.iTimeout;
iMaxBandwidth = Meta::mp.iMaxBandwidth;
iMaxUsers = Meta::mp.iMaxUsers;
iMaxUsersPerChannel = Meta::mp.iMaxUsersPerChannel;
iMaxTextMessageLength = Meta::mp.iMaxTextMessageLength;
iMaxImageMessageLength = Meta::mp.iMaxImageMessageLength;
bAllowHTML = Meta::mp.bAllowHTML;
iDefaultChan = Meta::mp.iDefaultChan;
bRememberChan = Meta::mp.bRememberChan;
iRememberChanDuration = Meta::mp.iRememberChanDuration;
qsWelcomeText = Meta::mp.qsWelcomeText;
qsWelcomeTextFile = Meta::mp.qsWelcomeTextFile;
qlBind = Meta::mp.qlBind;
qsRegName = Meta::mp.qsRegName;
qsRegPassword = Meta::mp.qsRegPassword;
qsRegHost = Meta::mp.qsRegHost;
qsRegLocation = Meta::mp.qsRegLocation;
qurlRegWeb = Meta::mp.qurlRegWeb;
bBonjour = Meta::mp.bBonjour;
bAllowPing = Meta::mp.bAllowPing;
allowRecording = Meta::mp.allowRecording;
bCertRequired = Meta::mp.bCertRequired;
bForceExternalAuth = Meta::mp.bForceExternalAuth;
qrUserName = Meta::mp.qrUserName;
qrChannelName = Meta::mp.qrChannelName;
iMessageLimit = Meta::mp.iMessageLimit;
iMessageBurst = Meta::mp.iMessageBurst;
iPluginMessageLimit = Meta::mp.iPluginMessageLimit;
iPluginMessageBurst = Meta::mp.iPluginMessageBurst;
qvSuggestVersion = Meta::mp.qvSuggestVersion;
qvSuggestPositional = Meta::mp.qvSuggestPositional;
qvSuggestPushToTalk = Meta::mp.qvSuggestPushToTalk;
iOpusThreshold = Meta::mp.iOpusThreshold;
iChannelNestingLimit = Meta::mp.iChannelNestingLimit;
iChannelCountLimit = Meta::mp.iChannelCountLimit;
QString qsHost = getConf("host", QString()).toString();
if (!qsHost.isEmpty()) {
qlBind.clear();
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
foreach (const QString &host, qsHost.split(QRegExp(QLatin1String("\\s+")), Qt::SkipEmptyParts)) {
#else
// Qt 5.14 introduced the Qt::SplitBehavior flags deprecating the QString fields
foreach (const QString &host, qsHost.split(QRegExp(QLatin1String("\\s+")), QString::SkipEmptyParts)) {
#endif
QHostAddress qhaddr;
if (qhaddr.setAddress(qsHost)) {
qlBind << qhaddr;
} else {
bool found = false;
QHostInfo hi = QHostInfo::fromName(host);
foreach (QHostAddress qha, hi.addresses()) {
if ((qha.protocol() == QAbstractSocket::IPv4Protocol)
|| (qha.protocol() == QAbstractSocket::IPv6Protocol)) {
qlBind << qha;
found = true;
}
}
if (!found) {
log(QString("Lookup of bind hostname %1 failed").arg(host));
}
}
}
foreach (const QHostAddress &qha, qlBind)
log(QString("Binding to address %1").arg(qha.toString()));
if (qlBind.isEmpty())
qlBind = Meta::mp.qlBind;
}
qsPassword = getConf("password", qsPassword).toString();
usPort = static_cast< unsigned short >(getConf("port", usPort).toUInt());
iTimeout = getConf("timeout", iTimeout).toInt();
iMaxBandwidth = getConf("bandwidth", iMaxBandwidth).toInt();
iMaxUsers = getConf("users", iMaxUsers).toInt();
iMaxUsersPerChannel = getConf("usersperchannel", iMaxUsersPerChannel).toInt();
iMaxTextMessageLength = getConf("textmessagelength", iMaxTextMessageLength).toInt();
iMaxImageMessageLength = getConf("imagemessagelength", iMaxImageMessageLength).toInt();
bAllowHTML = getConf("allowhtml", bAllowHTML).toBool();
iDefaultChan = getConf("defaultchannel", iDefaultChan).toInt();
bRememberChan = getConf("rememberchannel", bRememberChan).toBool();
iRememberChanDuration = getConf("rememberchannelduration", iRememberChanDuration).toInt();
qsWelcomeText = getConf("welcometext", qsWelcomeText).toString();
qsWelcomeTextFile = getConf("welcometextfile", qsWelcomeTextFile).toString();
if (!qsWelcomeTextFile.isEmpty()) {
if (qsWelcomeText.isEmpty()) {
QFile f(qsWelcomeTextFile);
if (f.open(QFile::ReadOnly | QFile::Text)) {
QTextStream in(&f);
qsWelcomeText = in.readAll();
f.close();
} else {
log(QString("Failed to open welcome text file %1").arg(qsWelcomeTextFile));
}
} else {
log(QString("Ignoring welcometextfile %1 because welcometext is defined").arg(qsWelcomeTextFile));
}
}
qsRegName = getConf("registername", qsRegName).toString();
qsRegPassword = getConf("registerpassword", qsRegPassword).toString();
qsRegHost = getConf("registerhostname", qsRegHost).toString();
qsRegLocation = getConf("registerlocation", qsRegLocation).toString();
qurlRegWeb = QUrl(getConf("registerurl", qurlRegWeb.toString()).toString());
bBonjour = getConf("bonjour", bBonjour).toBool();
bAllowPing = getConf("allowping", bAllowPing).toBool();
bCertRequired = getConf("certrequired", bCertRequired).toBool();
bForceExternalAuth = getConf("forceExternalAuth", bForceExternalAuth).toBool();
qvSuggestVersion = normalizeSuggestVersion(getConf("suggestversion", qvSuggestVersion));
if (qvSuggestVersion.toUInt() == 0)
qvSuggestVersion = QVariant();
qvSuggestPositional = getConf("suggestpositional", qvSuggestPositional);
if (qvSuggestPositional.toString().trimmed().isEmpty())
qvSuggestPositional = QVariant();
qvSuggestPushToTalk = getConf("suggestpushtotalk", qvSuggestPushToTalk);
if (qvSuggestPushToTalk.toString().trimmed().isEmpty())
qvSuggestPushToTalk = QVariant();
iOpusThreshold = getConf("opusthreshold", iOpusThreshold).toInt();
iChannelNestingLimit = getConf("channelnestinglimit", iChannelNestingLimit).toInt();
iChannelCountLimit = getConf("channelcountlimit", iChannelCountLimit).toInt();
qrUserName = QRegExp(getConf("username", qrUserName.pattern()).toString());
qrChannelName = QRegExp(getConf("channelname", qrChannelName.pattern()).toString());
iMessageLimit = getConf("messagelimit", iMessageLimit).toUInt();
if (iMessageLimit < 1) { // Prevent disabling messages entirely
iMessageLimit = 1;
}
iMessageBurst = getConf("messageburst", iMessageBurst).toUInt();
if (iMessageBurst < 1) { // Prevent disabling messages entirely
iMessageBurst = 1;
}
iPluginMessageLimit = getConf("mpluginessagelimit", iPluginMessageLimit).toUInt();
if (iPluginMessageLimit < 1) { // Prevent disabling messages entirely
iPluginMessageLimit = 1;
}
iPluginMessageBurst = getConf("pluginmessageburst", iPluginMessageBurst).toUInt();
if (iPluginMessageBurst < 1) { // Prevent disabling messages entirely
iPluginMessageBurst = 1;
}
}
void Server::setLiveConf(const QString &key, const QString &value) {
QString v = value.trimmed().isEmpty() ? QString() : value;
int i = v.toInt();
if ((key == "password") || (key == "serverpassword"))
qsPassword = !v.isNull() ? v : Meta::mp.qsPassword;
else if (key == "timeout")
iTimeout = i ? i : Meta::mp.iTimeout;
else if (key == "bandwidth") {
int length = i ? i : Meta::mp.iMaxBandwidth;
if (length != iMaxBandwidth) {
iMaxBandwidth = length;
MumbleProto::ServerConfig mpsc;
mpsc.set_max_bandwidth(length);
sendAll(mpsc);
}
} else if (key == "users") {
int newmax = i ? i : Meta::mp.iMaxUsers;
if (iMaxUsers == newmax)
return;
iMaxUsers = newmax;
qqIds.clear();
for (int id = 1; id < iMaxUsers * 2; ++id)
if (!qhUsers.contains(id))
qqIds.enqueue(id);
MumbleProto::ServerConfig mpsc;
mpsc.set_max_users(iMaxUsers);
sendAll(mpsc);
} else if (key == "usersperchannel")
iMaxUsersPerChannel = i ? i : Meta::mp.iMaxUsersPerChannel;
else if (key == "textmessagelength") {
int length = i ? i : Meta::mp.iMaxTextMessageLength;
if (length != iMaxTextMessageLength) {
iMaxTextMessageLength = length;
MumbleProto::ServerConfig mpsc;
mpsc.set_message_length(length);
sendAll(mpsc);
}
} else if (key == "imagemessagelength") {
int length = i ? i : Meta::mp.iMaxImageMessageLength;
if (length != iMaxImageMessageLength) {
iMaxImageMessageLength = length;
MumbleProto::ServerConfig mpsc;
mpsc.set_image_message_length(length);
sendAll(mpsc);
}
} else if (key == "allowhtml") {
bool allow = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bAllowHTML;
if (allow != bAllowHTML) {
bAllowHTML = allow;
MumbleProto::ServerConfig mpsc;
mpsc.set_allow_html(bAllowHTML);
sendAll(mpsc);
}
} else if (key == "defaultchannel")
iDefaultChan = i ? i : Meta::mp.iDefaultChan;
else if (key == "rememberchannel")
bRememberChan = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bRememberChan;
else if (key == "rememberchannelduration") {
iRememberChanDuration = !v.isNull() ? v.toInt() : Meta::mp.iRememberChanDuration;
if (iRememberChanDuration < 0) {
iRememberChanDuration = 0;
}
} else if (key == "welcometext") {
QString text = !v.isNull() ? v : Meta::mp.qsWelcomeText;
if (text != qsWelcomeText) {
qsWelcomeText = text;
}
} else if (key == "registername") {
QString text = !v.isNull() ? v : Meta::mp.qsRegName;
if (text != qsRegName) {
qsRegName = text;
if (!qsRegName.isEmpty()) {
MumbleProto::ChannelState mpcs;
mpcs.set_channel_id(0);
mpcs.set_name(u8(qsRegName));
sendAll(mpcs);
}
}
} else if (key == "registerpassword")
qsRegPassword = !v.isNull() ? v : Meta::mp.qsRegPassword;
else if (key == "registerhostname")
qsRegHost = !v.isNull() ? v : Meta::mp.qsRegHost;
else if (key == "registerlocation")
qsRegLocation = !v.isNull() ? v : Meta::mp.qsRegLocation;
else if (key == "registerurl")
qurlRegWeb = !v.isNull() ? v : Meta::mp.qurlRegWeb;
else if (key == "certrequired")
bCertRequired = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bCertRequired;
else if (key == "forceExternalAuth")
bForceExternalAuth = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bForceExternalAuth;
else if (key == "bonjour") {
bBonjour = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bBonjour;
#ifdef USE_ZEROCONF
if (bBonjour && !zeroconf) {
initZeroconf();
} else if (!bBonjour && zeroconf) {
removeZeroconf();
}
#endif
} else if (key == "allowping")
bAllowPing = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bAllowPing;
else if (key == "allowrecording")
allowRecording = !v.isNull() ? QVariant(v).toBool() : Meta::mp.allowRecording;
else if (key == "username")
qrUserName = !v.isNull() ? QRegExp(v) : Meta::mp.qrUserName;
else if (key == "channelname")
qrChannelName = !v.isNull() ? QRegExp(v) : Meta::mp.qrChannelName;
else if (key == "suggestversion")
qvSuggestVersion =
!v.isNull() ? (v.isEmpty() ? QVariant() : normalizeSuggestVersion(v)) : Meta::mp.qvSuggestVersion;
else if (key == "suggestpositional")
qvSuggestPositional = !v.isNull() ? (v.isEmpty() ? QVariant() : v) : Meta::mp.qvSuggestPositional;
else if (key == "suggestpushtotalk")
qvSuggestPushToTalk = !v.isNull() ? (v.isEmpty() ? QVariant() : v) : Meta::mp.qvSuggestPushToTalk;
else if (key == "opusthreshold")
iOpusThreshold = (i >= 0 && !v.isNull()) ? qBound(0, i, 100) : Meta::mp.iOpusThreshold;
else if (key == "channelnestinglimit")
iChannelNestingLimit = (i >= 0 && !v.isNull()) ? i : Meta::mp.iChannelNestingLimit;
else if (key == "channelcountlimit")
iChannelCountLimit = (i >= 0 && !v.isNull()) ? i : Meta::mp.iChannelCountLimit;
else if (key == "messagelimit") {
iMessageLimit = (!v.isNull()) ? v.toUInt() : Meta::mp.iMessageLimit;
if (iMessageLimit < 1) {
iMessageLimit = 1;
}
} else if (key == "messageburst") {
iMessageBurst = (!v.isNull()) ? v.toUInt() : Meta::mp.iMessageBurst;
if (iMessageBurst < 1) {
iMessageBurst = 1;
}
}
}
#ifdef USE_ZEROCONF
void Server::initZeroconf() {
zeroconf = new Zeroconf();
if (zeroconf->isOk()) {
log("Registering zeroconf service...");
zeroconf->registerService(BonjourRecord(qsRegName, "_mumble._tcp", ""), usPort);
return;
}
delete zeroconf;
zeroconf = nullptr;
}
void Server::removeZeroconf() {
if (!zeroconf) {
return;
}
if (zeroconf->isOk()) {
log("Unregistering zeroconf service...");
}
delete zeroconf;
zeroconf = nullptr;
}
#endif
gsl::span< const Mumble::Protocol::byte >
Server::handlePing(const Mumble::Protocol::UDPDecoder< Mumble::Protocol::Role::Server > &decoder,
Mumble::Protocol::UDPPingEncoder< Mumble::Protocol::Role::Server > &encoder,
bool expectExtended) {
Mumble::Protocol::PingData pingData = decoder.getPingData();
if (pingData.requestAdditionalInformation) {
pingData.requestAdditionalInformation = false;
pingData.serverVersion = m_versionBlob;
pingData.userCount = qhUsers.size();
pingData.maxUserCount = iMaxUsers;
pingData.maxBandwidthPerUser = iMaxBandwidth;
pingData.containsAdditionalInformation = true;
} else if (expectExtended) {
// Return zero-length span
return {};
}
// Encode in the same protocol version that we decoded with
encoder.setProtocolVersion(decoder.getProtocolVersion());
return encoder.encodePingPacket(pingData);
}
void Server::customEvent(QEvent *evt) {
if (evt->type() == EXEC_QEVENT)
static_cast< ExecEvent * >(evt)->execute();
}
void Server::udpActivated(int socket) {
// At this part we are only expecting pings of clients we don't know yet -> thus we also don't know which protocol
// version they are using.
m_udpDecoder.setProtocolVersion(Version::UNKNOWN);
qint32 len;
sockaddr_storage from;
#ifdef Q_OS_UNIX
# ifdef Q_OS_LINUX
struct msghdr msg;
struct iovec iov[1];
iov[0].iov_base = m_udpDecoder.getBuffer().data();
iov[0].iov_len = m_udpDecoder.getBuffer().size();
uint8_t controldata[CMSG_SPACE(std::max(sizeof(struct in6_pktinfo), sizeof(struct in_pktinfo)))];
memset(&msg, 0, sizeof(msg));
msg.msg_name = reinterpret_cast< struct sockaddr * >(&from);
msg.msg_namelen = sizeof(from);
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = controldata;
msg.msg_controllen = sizeof(controldata);
int &sock = socket;
len = static_cast< quint32 >(::recvmsg(sock, &msg, MSG_TRUNC));
# else
socklen_t fromlen = sizeof(from);
int &sock = socket;
len = static_cast< qint32 >(::recvfrom(sock, m_udpDecoder.getBuffer().data(), m_udpDecoder.getBuffer().size(),
MSG_TRUNC, reinterpret_cast< struct sockaddr * >(&from), &fromlen));
# endif
#else
int fromlen = sizeof(from);
SOCKET sock = static_cast< SOCKET >(socket);
len = ::recvfrom(sock, reinterpret_cast< char * >(m_udpDecoder.getBuffer().data()), m_udpDecoder.getBuffer().size(),
0, reinterpret_cast< struct sockaddr * >(&from), &fromlen);
#endif
gsl::span< Mumble::Protocol::byte > inputData(&m_udpDecoder.getBuffer()[0], len);
if (bAllowPing && m_udpDecoder.decodePing(inputData)
&& m_udpDecoder.getMessageType() == Mumble::Protocol::UDPMessageType::Ping) {
gsl::span< const Mumble::Protocol::byte > encodedPing = handlePing(m_udpDecoder, m_udpPingEncoder, true);
if (!encodedPing.empty()) {
#ifdef Q_OS_LINUX
// There will be space for only one header, and the only data we have asked for is the incoming
// address. So we can reuse most of the same msg and control data.
iov[0].iov_len = encodedPing.size();
iov[0].iov_base = const_cast< Mumble::Protocol::byte * >(encodedPing.data());
::sendmsg(sock, &msg, 0);
#else
::sendto(sock, reinterpret_cast< const char * >(encodedPing.data()), encodedPing.size(), 0,
reinterpret_cast< struct sockaddr * >(&from), fromlen);
#endif
}
}
}
void Server::run() {
tracy::SetThreadName("Audio");
qint32 len;
#if defined(__LP64__)
unsigned char encbuff[Mumble::Protocol::MAX_UDP_PACKET_SIZE + 8];
unsigned char *encrypt = encbuff + 4;
#else
unsigned char encrypt[Mumble::Protocol::MAX_UDP_PACKET_SIZE];
#endif
unsigned char buffer[Mumble::Protocol::MAX_UDP_PACKET_SIZE];
sockaddr_storage from;
int nfds = qlUdpSocket.count();
#ifdef Q_OS_UNIX
socklen_t fromlen;
STACKVAR(struct pollfd, fds, nfds + 1);
for (int i = 0; i < nfds; ++i) {
fds[i].fd = qlUdpSocket.at(i);
fds[i].events = POLLIN;
fds[i].revents = 0;
}
fds[nfds].fd = aiNotify[0];
fds[nfds].events = POLLIN;
fds[nfds].revents = 0;
#else
int fromlen;
STACKVAR(SOCKET, fds, nfds);
STACKVAR(HANDLE, events, nfds + 1);
for (int i = 0; i < nfds; ++i) {
fds[i] = qlUdpSocket.at(i);
events[i] = CreateEvent(nullptr, FALSE, FALSE, nullptr);
::WSAEventSelect(fds[i], events[i], FD_READ);
}
events[nfds] = hNotify;
#endif
++nfds;
while (bRunning) {
FrameMarkNamed(TracyConstants::UDP_FRAME);
#ifdef Q_OS_UNIX
int pret = poll(fds, nfds, -1);
if (pret <= 0) {
if (errno == EINTR)
continue;
qCritical("poll failure");
bRunning = false;
break;
}
if (fds[nfds - 1].revents) {
// Drain pipe
unsigned char val;
while (::recv(aiNotify[0], &val, 1, MSG_DONTWAIT) == 1) {
};
break;
}
for (int i = 0; i < nfds - 1; ++i) {
if (fds[i].revents) {
if (fds[i].revents & (POLLHUP | POLLERR | POLLNVAL)) {
qCritical("poll event failure");
bRunning = false;
break;
}
int sock = fds[i].fd;
#else
for (int i = 0; i < 1; ++i) {
{
DWORD ret = WaitForMultipleObjects(nfds, events, FALSE, INFINITE);
if (ret == (WAIT_OBJECT_0 + nfds - 1)) {
break;
}
if (ret == WAIT_FAILED) {
qCritical("UDP wait failed");
bRunning = false;
break;
}
SOCKET sock = fds[ret - WAIT_OBJECT_0];
#endif
fromlen = sizeof(from);
#ifdef Q_OS_WIN
len = ::recvfrom(sock, reinterpret_cast< char * >(encrypt), Mumble::Protocol::MAX_UDP_PACKET_SIZE, 0,
reinterpret_cast< struct sockaddr * >(&from), &fromlen);
#else
# ifdef Q_OS_LINUX
struct msghdr msg;
struct iovec iov[1];
iov[0].iov_base = encrypt;
iov[0].iov_len = Mumble::Protocol::MAX_UDP_PACKET_SIZE;
uint8_t controldata[CMSG_SPACE(std::max(sizeof(struct in6_pktinfo), sizeof(struct in_pktinfo)))];
memset(&msg, 0, sizeof(msg));
msg.msg_name = reinterpret_cast< struct sockaddr * >(&from);
msg.msg_namelen = sizeof(from);
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = controldata;
msg.msg_controllen = sizeof(controldata);
len = static_cast< quint32 >(::recvmsg(sock, &msg, MSG_TRUNC));
Q_UNUSED(fromlen);
# else
len = static_cast< qint32 >(::recvfrom(sock, encrypt, Mumble::Protocol::MAX_UDP_PACKET_SIZE, MSG_TRUNC,
reinterpret_cast< struct sockaddr * >(&from), &fromlen));
# endif
#endif
// Capture only the processing without the polling
ZoneScopedN(TracyConstants::UDP_PACKET_PROCESSING_ZONE);
if (len == 0) {
break;
} else if (len == SOCKET_ERROR) {
break;
} else if (len < 5) {
// 4 bytes crypt header + type + session
continue;
} else if (static_cast< unsigned int >(len) > Mumble::Protocol::MAX_UDP_PACKET_SIZE) {
// This will also catch the len == -1 case (indicating error)
static_assert(static_cast< unsigned int >(-1) > Mumble::Protocol::MAX_UDP_PACKET_SIZE,
"Invalid assumption");
continue;
}
QReadLocker rl(&qrwlVoiceThread);
quint16 port = (from.ss_family == AF_INET6) ? (reinterpret_cast< sockaddr_in6 * >(&from)->sin6_port)
: (reinterpret_cast< sockaddr_in * >(&from)->sin_port);
const HostAddress &ha = HostAddress(from);
const QPair< HostAddress, quint16 > &key = QPair< HostAddress, quint16 >(ha, port);
ServerUser *u = qhPeerUsers.value(key);
if (u) {
m_udpDecoder.setProtocolVersion(u->uiVersion);
} else {
m_udpDecoder.setProtocolVersion(Version::UNKNOWN);
}
// This may be a general ping requesting server details, unencrypted.
if (bAllowPing && m_udpDecoder.decodePing(gsl::span< Mumble::Protocol::byte >(encrypt, len))
&& m_udpDecoder.getMessageType() == Mumble::Protocol::UDPMessageType::Ping) {
ZoneScopedN(TracyConstants::PING_PROCESSING_ZONE);
gsl::span< const Mumble::Protocol::byte > encodedPing =
handlePing(m_udpDecoder, m_udpPingEncoder, true);
if (!encodedPing.empty()) {
#ifdef Q_OS_LINUX
// We are only reading from the buffer and thus the const_cast should be fine
iov[0].iov_base = const_cast< Mumble::Protocol::byte * >(encodedPing.data());
iov[0].iov_len = encodedPing.size();
::sendmsg(sock, &msg, 0);
#else
::sendto(sock, reinterpret_cast< const char * >(encodedPing.data()), encodedPing.size(), 0,
reinterpret_cast< struct sockaddr * >(&from), fromlen);
#endif
}
continue;
}
if (u) {
if (!checkDecrypt(u, encrypt, buffer, len)) {
continue;
}
} else {
ZoneScopedN(TracyConstants::DECRYPT_UNKNOWN_PEER_ZONE);
// Unknown peer
foreach (ServerUser *usr, qhHostUsers.value(ha)) {
if (checkDecrypt(usr, encrypt, buffer, len)) { // checkDecrypt takes the User's qrwlCrypt lock.
// Every time we relock, reverify users' existence.
// The main thread might delete the user while the lock isn't held.
unsigned int uiSession = usr->uiSession;
rl.unlock();
qrwlVoiceThread.lockForWrite();
if (qhUsers.contains(uiSession)) {
u = usr;
u->sUdpSocket = sock;
memcpy(&u->saiUdpAddress, &from, sizeof(from));
qhHostUsers[from].remove(u);
qhPeerUsers.insert(key, u);
}
qrwlVoiceThread.unlock();
rl.relock();
if (u && !qhUsers.contains(uiSession))
u = nullptr;
break;
}
}
if (!u) {
continue;
}
}
len -= 4;
if (m_udpDecoder.decode(gsl::span< Mumble::Protocol::byte >(buffer, len))) {
switch (m_udpDecoder.getMessageType()) {
case Mumble::Protocol::UDPMessageType::Audio: {
Mumble::Protocol::AudioData audioData = m_udpDecoder.getAudioData();
// Allow all voice packets through by default.
bool ok = true;
// ...Unless we're in Opus mode. In Opus mode, only Opus packets are allowed.
if (bOpus && audioData.usedCodec != Mumble::Protocol::AudioCodec::Opus) {
ok = false;
}
if (ok) {
u->aiUdpFlag = 1;
// Add session id
audioData.senderSession = u->uiSession;
processMsg(u, audioData, m_udpAudioReceivers, m_udpAudioEncoder);
}
break;
}
case Mumble::Protocol::UDPMessageType::Ping: {
ZoneScopedN(TracyConstants::UDP_PING_PROCESSING_ZONE);
Mumble::Protocol::PingData pingData = m_udpDecoder.getPingData();
if (!pingData.requestAdditionalInformation && !pingData.containsAdditionalInformation) {
// At this point here, we only want to handle connectivity pings
gsl::span< const Mumble::Protocol::byte > encodedPing =
handlePing(m_udpDecoder, m_udpPingEncoder, false);
QByteArray cache;
sendMessage(*u, encodedPing.data(), encodedPing.size(), cache, true);
}
break;
}
}
}
#ifdef Q_OS_UNIX
fds[i].revents = 0;
#endif
}
}
}
#ifdef Q_OS_WIN
for (int i = 0; i < nfds - 1; ++i) {
::WSAEventSelect(fds[i], nullptr, 0);
CloseHandle(events[i]);
}
#endif
}
bool Server::checkDecrypt(ServerUser *u, const unsigned char *encrypt, unsigned char *plain, unsigned int len) {
ZoneScoped;
QMutexLocker l(&u->qmCrypt);
if (u->csCrypt->isValid() && u->csCrypt->decrypt(encrypt, plain, len)) {
return true;
}
if (u->csCrypt->tLastGood.elapsed() > 5000000ULL) {
if (u->csCrypt->tLastRequest.elapsed() > 5000000ULL) {
u->csCrypt->tLastRequest.restart();
emit reqSync(u->uiSession);
}
}
return false;
}
void Server::sendMessage(ServerUser &u, const unsigned char *data, int len, QByteArray &cache, bool force) {
ZoneScoped;
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
if ((u.aiUdpFlag.loadRelaxed() == 1 || force) && (u.sUdpSocket != INVALID_SOCKET)) {
#else
// Qt 5.14 introduced QAtomicInteger::loadRelaxed() which deprecates QAtomicInteger::load()
if ((u.aiUdpFlag.load() == 1 || force) && (u.sUdpSocket != INVALID_SOCKET)) {
#endif
#if defined(__LP64__)
STACKVAR(char, ebuffer, len + 4 + 16);
char *buffer = reinterpret_cast< char * >(((reinterpret_cast< quint64 >(ebuffer) + 8) & ~7) + 4);
#else
STACKVAR(char, buffer, len + 4);
#endif
{
QMutexLocker wl(&u.qmCrypt);
if (!u.csCrypt->isValid()) {
return;
}
if (!u.csCrypt->encrypt(reinterpret_cast< const unsigned char * >(data),
reinterpret_cast< unsigned char * >(buffer), len)) {
return;
}
}
#ifdef Q_OS_WIN
DWORD dwFlow = 0;
if (Meta::hQoS)
QOSAddSocketToFlow(Meta::hQoS, u.sUdpSocket, reinterpret_cast< struct sockaddr * >(&u.saiUdpAddress),
QOSTrafficTypeVoice, QOS_NON_ADAPTIVE_FLOW, reinterpret_cast< PQOS_FLOWID >(&dwFlow));
#endif
#ifdef Q_OS_LINUX
struct msghdr msg;
struct iovec iov[1];
iov[0].iov_base = buffer;
iov[0].iov_len = len + 4;
uint8_t controldata[CMSG_SPACE(std::max(sizeof(struct in6_pktinfo), sizeof(struct in_pktinfo)))];
memset(controldata, 0, sizeof(controldata));
memset(&msg, 0, sizeof(msg));
msg.msg_name = reinterpret_cast< struct sockaddr * >(&u.saiUdpAddress);
msg.msg_namelen = static_cast< socklen_t >(
(u.saiUdpAddress.ss_family == AF_INET6) ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in));
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = controldata;
msg.msg_controllen = CMSG_SPACE((u.saiUdpAddress.ss_family == AF_INET6) ? sizeof(struct in6_pktinfo)
: sizeof(struct in_pktinfo));
struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
HostAddress tcpha(u.saiTcpLocalAddress);
if (u.saiUdpAddress.ss_family == AF_INET6) {
cmsg->cmsg_level = IPPROTO_IPV6;
cmsg->cmsg_type = IPV6_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
struct in6_pktinfo *pktinfo = reinterpret_cast< struct in6_pktinfo * >(CMSG_DATA(cmsg));
memset(pktinfo, 0, sizeof(*pktinfo));
memcpy(&pktinfo->ipi6_addr.s6_addr[0], &tcpha.qip6.c[0], sizeof(pktinfo->ipi6_addr.s6_addr));
} else {
cmsg->cmsg_level = IPPROTO_IP;
cmsg->cmsg_type = IP_PKTINFO;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
struct in_pktinfo *pktinfo = reinterpret_cast< struct in_pktinfo * >(CMSG_DATA(cmsg));
memset(pktinfo, 0, sizeof(*pktinfo));
if (tcpha.isV6())
return;
pktinfo->ipi_spec_dst.s_addr = tcpha.hash[3];
}
::sendmsg(u.sUdpSocket, &msg, 0);
#else
::sendto(u.sUdpSocket, buffer, len + 4, 0, reinterpret_cast< struct sockaddr * >(&u.saiUdpAddress),
(u.saiUdpAddress.ss_family == AF_INET6) ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in));
#endif
#ifdef Q_OS_WIN
if (Meta::hQoS && dwFlow)
QOSRemoveSocketFromFlow(Meta::hQoS, 0, dwFlow, 0);
#else
#endif
} else {
if (cache.isEmpty())
cache = QByteArray(reinterpret_cast< const char * >(data), len);
emit tcpTransmit(cache, u.uiSession);
}
}
void Server::processMsg(ServerUser *u, Mumble::Protocol::AudioData audioData, AudioReceiverBuffer &buffer,
Mumble::Protocol::UDPAudioEncoder< Mumble::Protocol::Role::Server > &encoder) {
ZoneScoped;
// Note that in this function we never have to acquire a read-lock on qrwlVoiceThread
// as all places that call this function will hold that lock at the point of calling
// this function.
// This function is currently called from Server::msgUDPTunnel, Server::run and
// Server::message
if (u->sState != ServerUser::Authenticated || u->bMute || u->bSuppress || u->bSelfMute)
return;
// Check the voice data rate limit.
{
BandwidthRecord *bw = &u->bwr;
// IP + UDP + Crypt + Data
const int packetsize = 20 + 8 + 4 + audioData.payload.size();
if (!bw->addFrame(packetsize, iMaxBandwidth / 8)) {
// Suppress packet.
return;
}
}
buffer.clear();
if (audioData.targetOrContext == Mumble::Protocol::ReservedTargetIDs::SERVER_LOOPBACK) {
buffer.forceAddReceiver(*u, Mumble::Protocol::AudioContext::NORMAL, audioData.containsPositionalData);
} else if (audioData.targetOrContext == Mumble::Protocol::ReservedTargetIDs::REGULAR_SPEECH) {
Channel *c = u->cChannel;
// Send audio to all users that are listening to the channel
foreach (unsigned int currentSession, m_channelListenerManager.getListenersForChannel(c->iId)) {
ServerUser *pDst = static_cast< ServerUser * >(qhUsers.value(currentSession));
if (pDst) {
buffer.addReceiver(*u, *pDst, Mumble::Protocol::AudioContext::LISTEN, audioData.containsPositionalData);
}
}
// Send audio to all users in the same channel
for (User *p : c->qlUsers) {
ServerUser *pDst = static_cast< ServerUser * >(p);
buffer.addReceiver(*u, *pDst, Mumble::Protocol::AudioContext::NORMAL, audioData.containsPositionalData);
}
// Send audio to all linked channels the user has speak-permission
if (!c->qhLinks.isEmpty()) {
QSet< Channel * > chans = c->allLinks();
chans.remove(c);
QMutexLocker qml(&qmCache);
for (Channel *l : chans) {
if (ChanACL::hasPermission(u, l, ChanACL::Speak, &acCache)) {
// Send the audio stream to all users that are listening to the linked channel
for (unsigned int currentSession : m_channelListenerManager.getListenersForChannel(l->iId)) {
ServerUser *pDst = static_cast< ServerUser * >(qhUsers.value(currentSession));
if (pDst) {
buffer.addReceiver(*u, *pDst, Mumble::Protocol::AudioContext::LISTEN,
audioData.containsPositionalData);
}
}
// Send audio to users in the linked channel
for (User *p : l->qlUsers) {
ServerUser *pDst = static_cast< ServerUser * >(p);
buffer.addReceiver(*u, *pDst, Mumble::Protocol::AudioContext::NORMAL,
audioData.containsPositionalData);
}
}
}
}
} else if (u->qmTargets.contains(audioData.targetOrContext)) { // Whisper/Shout
QSet< ServerUser * > channel;
QSet< ServerUser * > direct;
QSet< ServerUser * > listener;
if (u->qmTargetCache.contains(audioData.targetOrContext)) {
ZoneScopedN(TracyConstants::AUDIO_WHISPER_CACHE_STORE);
const WhisperTargetCache &cache = u->qmTargetCache.value(audioData.targetOrContext);
channel = cache.channelTargets;
direct = cache.directTargets;
listener = cache.listeningTargets;
} else {
ZoneScopedN(TracyConstants::AUDIO_WHISPER_CACHE_CREATE);
const WhisperTarget &wt = u->qmTargets.value(audioData.targetOrContext);
if (!wt.qlChannels.isEmpty()) {
QMutexLocker qml(&qmCache);
foreach (const WhisperTarget::Channel &wtc, wt.qlChannels) {
Channel *wc = qhChannels.value(wtc.iId);
if (wc) {
bool link = wtc.bLinks && !wc->qhLinks.isEmpty();
bool dochildren = wtc.bChildren && !wc->qlChannels.isEmpty();
bool group = !wtc.qsGroup.isEmpty();
if (!link && !dochildren && !group) {
// Common case
if (ChanACL::hasPermission(u, wc, ChanACL::Whisper, &acCache)) {
foreach (User *p, wc->qlUsers) { channel.insert(static_cast< ServerUser * >(p)); }
foreach (unsigned int currentSession,
m_channelListenerManager.getListenersForChannel(wc->iId)) {
ServerUser *pDst = static_cast< ServerUser * >(qhUsers.value(currentSession));
if (pDst) {
listener << pDst;
}
}
}
} else {
QSet< Channel * > channels;
if (link)
channels = wc->allLinks();
else
channels.insert(wc);
if (dochildren)
channels.unite(wc->allChildren());
const QString &redirect = u->qmWhisperRedirect.value(wtc.qsGroup);
const QString &qsg = redirect.isEmpty() ? wtc.qsGroup : redirect;
foreach (Channel *tc, channels) {
if (ChanACL::hasPermission(u, tc, ChanACL::Whisper, &acCache)) {
foreach (User *p, tc->qlUsers) {
ServerUser *su = static_cast< ServerUser * >(p);
if (!group || Group::isMember(tc, tc, qsg, su)) {
channel.insert(su);
}
}
foreach (unsigned int currentSession,
m_channelListenerManager.getListenersForChannel(tc->iId)) {
ServerUser *pDst = static_cast< ServerUser * >(qhUsers.value(currentSession));
if (pDst && (!group || Group::isMember(tc, tc, qsg, pDst))) {
// Only send audio to listener if the user exists and it is in the group the
// speech is directed at (if any)
listener << pDst;
}
}
}
}
}
}
}
// If a user receives the audio through this shout anyways, we won't send it through the
// listening channel again (and thus sending the audio twice)
listener -= channel;
}
{
QMutexLocker qml(&qmCache);
foreach (unsigned int id, wt.qlSessions) {
ServerUser *pDst = qhUsers.value(id);
if (pDst && ChanACL::hasPermission(u, pDst->cChannel, ChanACL::Whisper, &acCache)
&& !channel.contains(pDst))
direct.insert(pDst);
}
}
int uiSession = u->uiSession;
qrwlVoiceThread.unlock();
qrwlVoiceThread.lockForWrite();
if (qhUsers.contains(uiSession))
u->qmTargetCache.insert(audioData.targetOrContext, { channel, direct, listener });
qrwlVoiceThread.unlock();
qrwlVoiceThread.lockForRead();
if (!qhUsers.contains(uiSession))
return;
}
// These users receive the audio because someone is shouting to their channel
for (ServerUser *pDst : channel) {
buffer.addReceiver(*u, *pDst, Mumble::Protocol::AudioContext::SHOUT, audioData.containsPositionalData);
}
// These users receive audio because someone is whispering to them
for (ServerUser *pDst : direct) {
buffer.addReceiver(*u, *pDst, Mumble::Protocol::AudioContext::WHISPER, audioData.containsPositionalData);
}
// These users receive audio because someone is sending audio to one of their listeners
for (ServerUser *current : listener) {
buffer.addReceiver(*u, *current, Mumble::Protocol::AudioContext::LISTEN, audioData.containsPositionalData);
}
}
ZoneNamedN(__tracy_scoped_zone2, TracyConstants::AUDIO_SENDOUT_ZONE, true);
buffer.preprocessBuffer();
bool isFirstIteration = true;
QByteArray tcpCache;
for (bool includePositionalData : { true, false }) {
std::vector< AudioReceiver > &receiverList = buffer.getReceivers(includePositionalData);
audioData.containsPositionalData = includePositionalData && audioData.containsPositionalData;
if (!audioData.containsPositionalData) {
encoder.dropPositionalData();
}
// Note: The receiver-ranges are determined in such a way, that they are all going to receive the exact
// same audio packet.
ReceiverRange< std::vector< AudioReceiver >::iterator > currentRange =
AudioReceiverBuffer::getReceiverRange(receiverList.begin(), receiverList.end());
while (currentRange.begin != currentRange.end) {
// Setup encoder for this range
if (isFirstIteration
|| !Mumble::Protocol::protocolVersionsAreCompatible(encoder.getProtocolVersion(),
currentRange.begin->getReceiver().uiVersion)) {
ZoneScopedN(TracyConstants::AUDIO_ENCODE);
encoder.setProtocolVersion(currentRange.begin->getReceiver().uiVersion);
// We have to re-encode the "fixed" part of the audio message
encoder.prepareAudioPacket(audioData);
if (audioData.containsPositionalData) {
encoder.addPositionalData(audioData);
}
isFirstIteration = false;
}
audioData.targetOrContext = currentRange.begin->getContext();
// Update data
TracyCZoneN(__tracy_zone, TracyConstants::AUDIO_UPDATE, true);
gsl::span< const Mumble::Protocol::byte > encodedPacket = encoder.updateAudioPacket(audioData);
TracyCZoneEnd(__tracy_zone);
// Clear TCP cache
tcpCache.clear();
// Send encoded packet to all receivers of this range
for (auto it = currentRange.begin; it != currentRange.end; ++it) {
sendMessage(it->getReceiver(), encodedPacket.data(), encodedPacket.size(), tcpCache);
}
// Find next range
currentRange = AudioReceiverBuffer::getReceiverRange(currentRange.end, receiverList.end());
}
}
}
void Server::log(ServerUser *u, const QString &str) const {
QString msg = QString("<%1:%2(%3)> %4").arg(QString::number(u->uiSession), u->qsName, QString::number(u->iId), str);
log(msg);
}
void Server::log(const QString &msg) const {
dblog(msg);
qWarning("%d => %s", iServerNum, msg.toUtf8().constData());
}
void Server::newClient() {
SslServer *ss = qobject_cast< SslServer * >(sender());
if (!ss)
return;
forever {
QSslSocket *sock = ss->nextPendingSSLConnection();
if (!sock)
return;
QHostAddress adr = sock->peerAddress();
if (meta->banCheck(adr)) {
log(QString("Ignoring connection: %1 (Global ban)")
.arg(addressToString(sock->peerAddress(), sock->peerPort())));
sock->disconnectFromHost();
sock->deleteLater();
return;
}
HostAddress ha(adr);
QList< Ban > tmpBans = qlBans;
foreach (const Ban &ban, qlBans) {
if (ban.isExpired())
tmpBans.removeOne(ban);
}
if (qlBans.count() != tmpBans.count()) {
qlBans = tmpBans;
saveBans();
}
foreach (const Ban &ban, qlBans) {
if (ban.haAddress.match(ha, ban.iMask)) {
log(QString("Ignoring connection: %1, Reason: %2, Username: %3, Hash: %4 (Server ban)")
.arg(addressToString(sock->peerAddress(), sock->peerPort()), ban.qsReason, ban.qsUsername,
ban.qsHash));
sock->disconnectFromHost();
sock->deleteLater();
return;
}
}
#ifdef Q_OS_MAC
// One unexpected behavior of Qt's SSL backend is: it will add the key pair
// it uses in a connection into the default keychain, and when access the private
// key afterwards, a pop up will show up asking for user's permission.
// In some case (OS X 10.15.5), this pop up will be suppressed somehow and no private
// key is returned.
// This env variable will avoid Qt directly adding the key pair into the default keychain,
// using a temporary keychain instead.
// See #4298 and https://codereview.qt-project.org/c/qt/qtbase/+/184243
EnvUtils::setenv("QT_SSL_USE_TEMPORARY_KEYCHAIN", "1");
#endif
sock->setPrivateKey(qskKey);
sock->setLocalCertificate(qscCert);
QSslConfiguration config;
#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
config = sock->sslConfiguration();
// Qt 5.15 introduced QSslConfiguration::addCaCertificate(s) that should be preferred over the functions in
// QSslSocket
// Treat the leaf certificate as a root.
// This shouldn't strictly be necessary,
// and is a left-over from early on.
// Perhaps it is necessary for self-signed
// certs?
config.addCaCertificate(qscCert);
// Add CA certificates specified via
// murmur.ini's sslCA option.
config.addCaCertificates(Meta::mp.qlCA);
// Add intermediate CAs found in the PEM
// bundle used for this server's certificate.
config.addCaCertificates(qlIntermediates);
#else
// Treat the leaf certificate as a root.
// This shouldn't strictly be necessary,
// and is a left-over from early on.
// Perhaps it is necessary for self-signed
// certs?
sock->addCaCertificate(qscCert);
// Add CA certificates specified via
// murmur.ini's sslCA option.
sock->addCaCertificates(Meta::mp.qlCA);
// Add intermediate CAs found in the PEM
// bundle used for this server's certificate.
sock->addCaCertificates(qlIntermediates);
// Must not get config from socket before setting CA certificates
config = sock->sslConfiguration();
#endif
config.setCiphers(Meta::mp.qlCiphers);
#if defined(USE_QSSLDIFFIEHELLMANPARAMETERS)
config.setDiffieHellmanParameters(qsdhpDHParams);
#endif
sock->setSslConfiguration(config);
if (qqIds.isEmpty()) {
log(QString("Session ID pool (%1) empty, rejecting connection").arg(iMaxUsers));
sock->disconnectFromHost();
sock->deleteLater();
return;
}
ServerUser *u = new ServerUser(this, sock);
u->haAddress = ha;
HostAddress(sock->localAddress()).toSockaddr(&u->saiTcpLocalAddress);
connect(u, &ServerUser::connectionClosed, this, &Server::connectionClosed);
connect(u, SIGNAL(message(Mumble::Protocol::TCPMessageType, const QByteArray &)), this,
SLOT(message(Mumble::Protocol::TCPMessageType, const QByteArray &)));
connect(u, &ServerUser::handleSslErrors, this, &Server::sslError);
connect(u, &ServerUser::encrypted, this, &Server::encrypted);
log(u, QString("New connection: %1").arg(addressToString(sock->peerAddress(), sock->peerPort())));
u->setToS();
#if QT_VERSION >= 0x050500
sock->setProtocol(QSsl::TlsV1_0OrLater);
#elif QT_VERSION >= 0x050400
// In Qt 5.4, QSsl::SecureProtocols is equivalent
// to "TLSv1.0 or later", which we require.
sock->setProtocol(QSsl::SecureProtocols);
#else
sock->setProtocol(QSsl::TlsV1_0);
#endif
sock->startServerEncryption();
meta->successfulConnectionFrom(adr);
}
}
void Server::encrypted() {
ServerUser *uSource = qobject_cast< ServerUser * >(sender());
int major, minor, patch;
QString release;
Meta::getVersion(major, minor, patch, release);
MumbleProto::Version mpv;
mpv.set_version((major << 16) | (minor << 8) | patch);
if (Meta::mp.bSendVersion) {
mpv.set_release(u8(release));
mpv.set_os(u8(meta->qsOS));
mpv.set_os_version(u8(meta->qsOSVersion));
}
sendMessage(uSource, mpv);
QList< QSslCertificate > certs = uSource->peerCertificateChain();
if (!certs.isEmpty()) {
// Get the client's immediate SSL certificate
const QSslCertificate &cert = certs.first();
uSource->qslEmail = cert.subjectAlternativeNames().values(QSsl::EmailEntry);
uSource->qsHash = QString::fromLatin1(cert.digest(QCryptographicHash::Sha1).toHex());
if (!uSource->qslEmail.isEmpty() && uSource->bVerified) {
QString subject;
QString issuer;
QStringList subjectList = cert.subjectInfo(QSslCertificate::CommonName);
if (!subjectList.isEmpty()) {
subject = subjectList.first();
}
QStringList issuerList = certs.first().issuerInfo(QSslCertificate::CommonName);
if (!issuerList.isEmpty()) {
issuer = issuerList.first();
}
log(uSource, QString::fromUtf8("Strong certificate for %1 <%2> (signed by %3)")
.arg(subject)
.arg(uSource->qslEmail.join(", "))
.arg(issuer));
}
foreach (const Ban &ban, qlBans) {
if (ban.qsHash == uSource->qsHash) {
log(uSource, QString("Certificate hash is banned: %1, Username: %2, Reason: %3.")
.arg(ban.qsHash, ban.qsUsername, ban.qsReason));
uSource->disconnectSocket();
}
}
}
}
void Server::sslError(const QList< QSslError > &errors) {
ServerUser *u = qobject_cast< ServerUser * >(sender());
if (!u)
return;
bool ok = true;
foreach (QSslError e, errors) {
switch (e.error()) {
case QSslError::InvalidPurpose:
// Allow email certificates.
break;
case QSslError::NoPeerCertificate:
case QSslError::SelfSignedCertificate:
case QSslError::SelfSignedCertificateInChain:
case QSslError::UnableToGetLocalIssuerCertificate:
case QSslError::UnableToVerifyFirstCertificate:
case QSslError::HostNameMismatch:
case QSslError::CertificateNotYetValid:
case QSslError::CertificateExpired:
u->bVerified = false;
break;
default:
log(u, QString("SSL Error: %1").arg(e.errorString()));
ok = false;
}
}
if (ok) {
u->proceedAnyway();
} else {
// Due to a regression in Qt 5 (QTBUG-53906),
// we can't 'force' disconnect (which calls
// QAbstractSocket->abort()) when built against Qt 5.
//
// The bug is that Qt doesn't update the
// QSslSocket's socket state when QSslSocket->abort()
// is called.
//
// Our call to abort() happens when QSslSocket is inside
// startHandshake(). That is, a handshake is in progress.
//
// After emitting the peerVerifyError/sslErrors signals,
// startHandshake() checks whether the connection is still
// in QAbstractSocket::ConectedState.
//
// Unfortunately, because abort() doesn't update the socket's
// state to signal that it is no longer connected, startHandshake()
// still thinks the socket is connected and will continue to
// attempt to finish the handshake.
//
// Because abort() tears down a lot of internal state
// of the QSslSocket, including the 'SSL *' object
// associated with the socket, this is fatal and leads
// to crashes, such as attempting to derefernce a nullptr
// 'SSL *' object.
//
// To avoid this, we use a non-forceful disconnect
// until this is fixed upstream.
//
// See
// https://bugreports.qt.io/browse/QTBUG-53906
// https://github.com/mumble-voip/mumble/issues/2334
u->disconnectSocket();
}
}
void Server::connectionClosed(QAbstractSocket::SocketError err, const QString &reason) {
if (reason.contains(QLatin1String("140E0197"))) {
// A severe bug was introduced in qt/qtbase@93a803a6de27d9eb57931c431b5f3d074914f693.
// q_SSL_shutdown() causes Qt to emit "error()" from unrelated QSslSocket(s), in addition to the correct one.
// The issue causes this function to disconnect random authenticated clients.
//
// The workaround consists in ignoring a specific OpenSSL error:
// "Error while reading: error:140E0197:SSL routines:SSL_shutdown:shutdown while in init [20]"
//
// Definitely not ideal, but it fixes a critical vulnerability.
qWarning("Ignored OpenSSL error 140E0197 for %p", static_cast< void * >(sender()));
return;
}
Connection *c = qobject_cast< Connection * >(sender());
if (!c)
return;
if (c->bDisconnectedEmitted)
return;
c->bDisconnectedEmitted = true;
ServerUser *u = static_cast< ServerUser * >(c);
log(u, QString("Connection closed: %1 [%2]").arg(reason).arg(err));
setLastDisconnect(u);
if (u->sState == ServerUser::Authenticated) {
if (m_channelListenerManager.isListeningToAny(u->uiSession)) {
// Send nessage to all other clients that this particular user won't be listening
// to any channel anymore
MumbleProto::UserState mpus;
mpus.set_session(u->uiSession);
foreach (int channelID, m_channelListenerManager.getListenedChannelsForUser(u->uiSession)) {
mpus.add_listening_channel_remove(channelID);
// Also remove the client from the list on the server
m_channelListenerManager.removeListener(u->uiSession, channelID);
}
sendExcept(u, mpus);
}
MumbleProto::UserRemove mpur;
mpur.set_session(u->uiSession);
sendExcept(u, mpur);
emit userDisconnected(u);
}
Channel *old = u->cChannel;
{
QWriteLocker wl(&qrwlVoiceThread);
qhUsers.remove(u->uiSession);
qhHostUsers[u->haAddress].remove(u);
quint16 port = (u->saiUdpAddress.ss_family == AF_INET6)
? (reinterpret_cast< sockaddr_in6 * >(&u->saiUdpAddress)->sin6_port)
: (reinterpret_cast< sockaddr_in * >(&u->saiUdpAddress)->sin_port);
const QPair< HostAddress, quint16 > &key = QPair< HostAddress, quint16 >(u->haAddress, port);
qhPeerUsers.remove(key);
if (old)
old->removeUser(u);
}
if (old && old->bTemporary && old->qlUsers.isEmpty())
QCoreApplication::instance()->postEvent(this,
new ExecEvent(boost::bind(&Server::removeChannel, this, old->iId)));
if (u->uiSession > 0 && static_cast< int >(u->uiSession) < iMaxUsers * 2)
qqIds.enqueue(u->uiSession); // Reinsert session id into pool
if (u->sState == ServerUser::Authenticated) {
clearTempGroups(u); // Also clears ACL cache
recheckCodecVersions(); // Maybe can choose a better codec now
}
u->deleteLater();
if (qhUsers.isEmpty())
stopThread();
}
void Server::message(Mumble::Protocol::TCPMessageType type, const QByteArray &qbaMsg, ServerUser *u) {
ZoneScopedN(TracyConstants::TCP_PACKET_PROCESSING_ZONE);
if (!u) {
u = static_cast< ServerUser * >(sender());
}
if (u->sState == ServerUser::Authenticated) {
u->resetActivityTime();
}
if (type == Mumble::Protocol::TCPMessageType::UDPTunnel) {
int len = qbaMsg.size();
if (len < 2 || static_cast< unsigned int >(len) > Mumble::Protocol::MAX_UDP_PACKET_SIZE) {
// Drop messages that are too small to be senseful or that are bigger than allowed
return;
}
QReadLocker rl(&qrwlVoiceThread);
u->aiUdpFlag = 0;
m_tcpTunnelDecoder.setProtocolVersion(u->uiVersion);
if (m_tcpTunnelDecoder.decode(gsl::span< const Mumble::Protocol::byte >(
reinterpret_cast< const Mumble::Protocol::byte * >(qbaMsg.constData()), qbaMsg.size()))) {
if (m_tcpTunnelDecoder.getMessageType() == Mumble::Protocol::UDPMessageType::Audio) {
Mumble::Protocol::AudioData audioData = m_tcpTunnelDecoder.getAudioData();
// Allow all voice packets through by default.
bool ok = true;
// ...Unless we're in Opus mode. In Opus mode, only Opus packets are allowed.
if (bOpus && audioData.usedCodec != Mumble::Protocol::AudioCodec::Opus) {
ok = false;
}
if (ok) {
// Add session id
audioData.senderSession = u->uiSession;
processMsg(u, std::move(audioData), m_tcpAudioReceivers, m_tcpAudioEncoder);
}
}
}
return;
}
#ifdef QT_NO_DEBUG
# define PROCESS_MUMBLE_TCP_MESSAGE(name, value) \
case Mumble::Protocol::TCPMessageType::name: { \
MumbleProto::name msg; \
if (msg.ParseFromArray(qbaMsg.constData(), qbaMsg.size())) { \
msg.DiscardUnknownFields(); \
msg##name(u, msg); \
} \
break; \
}
#else
# define PROCESS_MUMBLE_TCP_MESSAGE(name, value) \
case Mumble::Protocol::TCPMessageType::name: { \
MumbleProto::name msg; \
if (msg.ParseFromArray(qbaMsg.constData(), qbaMsg.size())) { \
if (type != Mumble::Protocol::TCPMessageType::Ping) { \
printf("== %s:\n", #name); \
msg.PrintDebugString(); \
} \
msg.DiscardUnknownFields(); \
msg##name(u, msg); \
} \
break; \
}
#endif
switch (type) { MUMBLE_ALL_TCP_MESSAGES }
#undef PROCESS_MUMBLE_TCP_MESSAGE
}
void Server::checkTimeout() {
QList< ServerUser * > qlClose;
qrwlVoiceThread.lockForRead();
foreach (ServerUser *u, qhUsers) {
if (u->activityTime() > (iTimeout * 1000)) {
log(u, "Timeout");
qlClose.append(u);
}
}
qrwlVoiceThread.unlock();
foreach (ServerUser *u, qlClose)
u->disconnectSocket(true);
}
void Server::tcpTransmitData(QByteArray a, unsigned int id) {
Connection *c = qhUsers.value(id);
if (c) {
QByteArray qba;
int len = a.size();
qba.resize(len + 6);
unsigned char *uc = reinterpret_cast< unsigned char * >(qba.data());
*reinterpret_cast< quint16 * >(&uc[0]) =
qToBigEndian(static_cast< quint16 >(Mumble::Protocol::TCPMessageType::UDPTunnel));
*reinterpret_cast< quint32 * >(&uc[2]) = qToBigEndian(static_cast< quint32 >(len));
memcpy(uc + 6, a.constData(), len);
c->sendMessage(qba);
c->forceFlush();
}
}
void Server::doSync(unsigned int id) {
ServerUser *u = qhUsers.value(id);
if (u) {
log(u, "Requesting crypt-nonce resync");
MumbleProto::CryptSetup mpcs;
sendMessage(u, mpcs);
}
}
void Server::sendProtoMessage(ServerUser *u, const ::google::protobuf::Message &msg,
Mumble::Protocol::TCPMessageType msgType) {
QByteArray cache;
u->sendMessage(msg, msgType, cache);
}
void Server::sendProtoAll(const ::google::protobuf::Message &msg, Mumble::Protocol::TCPMessageType msgType,
unsigned int version) {
sendProtoExcept(nullptr, msg, msgType, version);
}
void Server::sendProtoExcept(ServerUser *u, const ::google::protobuf::Message &msg,
Mumble::Protocol::TCPMessageType msgType, unsigned int version) {
QByteArray cache;
foreach (ServerUser *usr, qhUsers)
if ((usr != u) && (usr->sState == ServerUser::Authenticated))
if ((version == 0) || (usr->uiVersion >= version)
|| ((version & 0x80000000) && (usr->uiVersion < (~version))))
usr->sendMessage(msg, msgType, cache);
}
void Server::removeChannel(int id) {
Channel *c = qhChannels.value(id);
if (c)
removeChannel(c);
}
void Server::removeChannel(Channel *chan, Channel *dest) {
Channel *c;
User *p;
if (!dest)
dest = chan->cParent;
{
QWriteLocker wl(&qrwlVoiceThread);
chan->unlink(nullptr);
}
foreach (c, chan->qlChannels) { removeChannel(c, dest); }
foreach (p, chan->qlUsers) {
{
QWriteLocker wl(&qrwlVoiceThread);
chan->removeUser(p);
}
Channel *target = dest;
while (target->cParent
&& (!hasPermission(static_cast< ServerUser * >(p), target, ChanACL::Enter)
|| isChannelFull(target, static_cast< ServerUser * >(p))))
target = target->cParent;
MumbleProto::UserState mpus;
mpus.set_session(p->uiSession);
mpus.set_channel_id(target->iId);
userEnterChannel(p, target, mpus);
sendAll(mpus);
emit userStateChanged(p);
}
foreach (unsigned int userSession, m_channelListenerManager.getListenersForChannel(chan->iId)) {
m_channelListenerManager.removeListener(userSession, chan->iId);
// Notify that all clients that have been listening to this channel, will do so no more
MumbleProto::UserState mpus;
mpus.set_session(userSession);
mpus.add_listening_channel_remove(chan->iId);
sendAll(mpus);
}
MumbleProto::ChannelRemove mpcr;
mpcr.set_channel_id(chan->iId);
sendAll(mpcr);
removeChannelDB(chan);
emit channelRemoved(chan);
if (chan->cParent) {
QWriteLocker wl(&qrwlVoiceThread);
chan->cParent->removeChannel(chan);
}
delete chan;
}
bool Server::unregisterUser(int id) {
if (!unregisterUserDB(id))
return false;
{
QMutexLocker lock(&qmCache);
foreach (Channel *c, qhChannels) {
bool write = false;
QList< ChanACL * > ql = c->qlACL;
foreach (ChanACL *acl, ql) {
if (acl->iUserId == id) {
c->qlACL.removeAll(acl);
write = true;
}
}
foreach (Group *g, c->qhGroups) {
bool addrem = g->qsAdd.remove(id);
bool remrem = g->qsRemove.remove(id);
write = write || addrem || remrem;
}
if (write)
updateChannel(c);
}
}
foreach (ServerUser *u, qhUsers) {
if (u->iId == id) {
clearACLCache(u);
MumbleProto::UserState mpus;
mpus.set_session(u->uiSession);
mpus.set_user_id(-1);
sendAll(mpus);
u->iId = -1;
break;
}
}
return true;
}
void Server::userEnterChannel(User *p, Channel *c, MumbleProto::UserState &mpus) {
if (p->cChannel == c)
return;
Channel *old = p->cChannel;
{
QWriteLocker wl(&qrwlVoiceThread);
c->addUser(p);
bool mayspeak = ChanACL::hasPermission(static_cast< ServerUser * >(p), c, ChanACL::Speak, nullptr);
bool sup = p->bSuppress;
if (mayspeak == sup) {
// Ok, he can speak and was suppressed, or vice versa
p->bSuppress = !mayspeak;
mpus.set_suppress(p->bSuppress);
}
}
clearACLCache(p);
setLastChannel(p);
if (old && old->bTemporary && old->qlUsers.isEmpty()) {
QCoreApplication::instance()->postEvent(this,
new ExecEvent(boost::bind(&Server::removeChannel, this, old->iId)));
}
sendClientPermission(static_cast< ServerUser * >(p), c);
if (c->cParent)
sendClientPermission(static_cast< ServerUser * >(p), c->cParent);
}
bool Server::hasPermission(ServerUser *p, Channel *c, QFlags< ChanACL::Perm > perm) {
QMutexLocker qml(&qmCache);
return ChanACL::hasPermission(p, c, perm, &acCache);
}
QFlags< ChanACL::Perm > Server::effectivePermissions(ServerUser *p, Channel *c) {
QMutexLocker qml(&qmCache);
return ChanACL::effectivePermissions(p, c, &acCache);
}
void Server::sendClientPermission(ServerUser *u, Channel *c, bool forceupdate) {
unsigned int perm;
if (u->iId == 0)
return;
{
QMutexLocker qml(&qmCache);
ChanACL::hasPermission(u, c, ChanACL::Enter, &acCache);
perm = acCache.value(u)->value(c);
}
if (forceupdate)
u->iLastPermissionCheck = c->iId;
if (u->qmPermissionSent.value(c->iId) != perm) {
u->qmPermissionSent.insert(c->iId, perm);
MumbleProto::PermissionQuery mppq;
mppq.set_channel_id(c->iId);
mppq.set_permissions(perm);
sendMessage(u, mppq);
}
}
/* This function is a helper for clearACLCache and assumes qmCache is held.
* First, check if anything actually changed, or if the list is getting awfully large,
* because this function is potentially quite expensive.
* If all the items are still valid; great. If they aren't, send off the last channel
* the client expliticly asked for -- this may not be what it wants, but it's our best
* guess.
*/
void Server::flushClientPermissionCache(ServerUser *u, MumbleProto::PermissionQuery &mppq) {
QMap< int, unsigned int >::const_iterator i;
bool match = (u->qmPermissionSent.count() < 20);
for (i = u->qmPermissionSent.constBegin(); (match && (i != u->qmPermissionSent.constEnd())); ++i) {
Channel *c = qhChannels.value(i.key());
if (!c) {
match = false;
} else {
ChanACL::hasPermission(u, c, ChanACL::Enter, &acCache);
unsigned int perm = acCache.value(u)->value(c);
if (perm != i.value())
match = false;
}
}
if (match)
return;
u->qmPermissionSent.clear();
Channel *c = qhChannels.value(u->iLastPermissionCheck);
if (!c) {
c = u->cChannel;
u->iLastPermissionCheck = c->iId;
}
ChanACL::hasPermission(u, c, ChanACL::Enter, &acCache);
unsigned int perm = acCache.value(u)->value(c);
u->qmPermissionSent.insert(c->iId, perm);
mppq.Clear();
mppq.set_channel_id(c->iId);
mppq.set_permissions(perm);
mppq.set_flush(true);
sendMessage(u, mppq);
}
void Server::clearACLCache(User *p) {
MumbleProto::PermissionQuery mppq;
{
QMutexLocker qml(&qmCache);
if (p) {
ChanACL::ChanCache *h = acCache.take(p);
delete h;
flushClientPermissionCache(static_cast< ServerUser * >(p), mppq);
} else {
foreach (ChanACL::ChanCache *h, acCache)
delete h;
acCache.clear();
foreach (ServerUser *u, qhUsers)
if (u->sState == ServerUser::Authenticated)
flushClientPermissionCache(u, mppq);
}
// A change in ACLs could also change a user's suppression state
MumbleProto::UserState mpus;
auto processingFunction = [&](ServerUser *user) {
bool maySpeak = ChanACL::hasPermission(user, user->cChannel, ChanACL::Speak, &acCache);
if (maySpeak == user->bSuppress) {
// Mirror a user's ability to speak in the current channel (by means of the ACLs) in the suppress
// property (not being allowed to speak -> suppressed and vice versa)
user->bSuppress = !maySpeak;
mpus.Clear();
mpus.set_session(user->uiSession);
mpus.set_suppress(true);
sendAll(mpus);
}
};
if (p) {
processingFunction(static_cast< ServerUser * >(p));
} else {
for (ServerUser *currentUser : qhUsers) {
processingFunction(currentUser);
}
}
}
// A change in ACLs means that the user might be able to whisper
// to users it didn't have permission to do before (or vice versa)
clearWhisperTargetCache();
}
void Server::clearWhisperTargetCache() {
QWriteLocker lock(&qrwlVoiceThread);
foreach (ServerUser *u, qhUsers) { u->qmTargetCache.clear(); }
}
QString Server::addressToString(const QHostAddress &adr, unsigned short port) {
HostAddress ha(adr);
if ((Meta::mp.iObfuscate != 0)) {
QCryptographicHash h(QCryptographicHash::Sha1);
h.addData(reinterpret_cast< const char * >(&Meta::mp.iObfuscate), sizeof(Meta::mp.iObfuscate));
if (adr.protocol() == QAbstractSocket::IPv4Protocol) {
quint32 num = adr.toIPv4Address();
h.addData(reinterpret_cast< const char * >(&num), sizeof(num));
} else if (adr.protocol() == QAbstractSocket::IPv6Protocol) {
Q_IPV6ADDR num = adr.toIPv6Address();
h.addData(reinterpret_cast< const char * >(num.c), sizeof(num.c));
}
return QString("<<%1:%2>>").arg(QString::fromLatin1(h.result().toHex()), QString::number(port));
}
return QString("%1:%2").arg(ha.toString(), QString::number(port));
}
bool Server::validateUserName(const QString &name) {
// We expect the name passed to this function to be fully trimmed already. This way we
// prevent "empty" names (at least with the default username restriction).
return (name.trimmed().length() == name.length() && qrUserName.exactMatch(name) && (name.length() <= 512));
}
bool Server::validateChannelName(const QString &name) {
return (qrChannelName.exactMatch(name) && (name.length() <= 512));
}
void Server::recheckCodecVersions(ServerUser *connectingUser) {
QMap< int, int > qmCodecUsercount;
QMap< int, int >::const_iterator i;
int users = 0;
int opus = 0;
// Count how many users use which codec
foreach (ServerUser *u, qhUsers) {
if (u->qlCodecs.isEmpty() && !u->bOpus)
continue;
++users;
if (u->bOpus)
++opus;
foreach (int version, u->qlCodecs)
++qmCodecUsercount[version];
}
if (!users)
return;
// Enable Opus if the number of users with Opus is higher than the threshold
bool enableOpus = ((opus * 100 / users) >= iOpusThreshold);
// Find the best possible codec most users support
int version = 0;
int maximum_users = 0;
i = qmCodecUsercount.constEnd();
do {
--i;
if (i.value() > maximum_users) {
version = i.key();
maximum_users = i.value();
}
} while (i != qmCodecUsercount.constBegin());
int current_version = bPreferAlpha ? iCodecAlpha : iCodecBeta;
// If we don't already use the compat bitstream version set
// it as alpha and announce it. If another codec now got the
// majority set it as the opposite of the currently valid bPreferAlpha
// and announce it.
if (current_version != version) {
if (version == static_cast< qint32 >(0x8000000b))
bPreferAlpha = true;
else
bPreferAlpha = !bPreferAlpha;
if (bPreferAlpha)
iCodecAlpha = version;
else
iCodecBeta = version;
} else if (bOpus == enableOpus) {
if (bOpus && connectingUser && !connectingUser->bOpus) {
sendTextMessage(
nullptr, connectingUser, false,
QLatin1String(
"<strong>WARNING:</strong> Your client doesn't support the Opus codec the server is using, you "
"won't be able to talk or hear anyone. Please upgrade to a client with Opus support."));
}
return;
}
bOpus = enableOpus;
MumbleProto::CodecVersion mpcv;
mpcv.set_alpha(iCodecAlpha);
mpcv.set_beta(iCodecBeta);
mpcv.set_prefer_alpha(bPreferAlpha);
mpcv.set_opus(bOpus);
sendAll(mpcv);
if (bOpus) {
foreach (ServerUser *u, qhUsers) {
// Prevent connected users that could not yet declare their opus capability during msgAuthenticate from
// being spammed. Only authenticated users and the currently connecting user (if recheck is called in that
// context) have a reliable u->bOpus.
if ((u->sState == ServerUser::Authenticated || u == connectingUser) && !u->bOpus) {
sendTextMessage(
nullptr, u, false,
QLatin1String(
"<strong>WARNING:</strong> Your client doesn't support the Opus codec the server is switching "
"to, you won't be able to talk or hear anyone. Please upgrade to a client with Opus support."));
}
}
}
log(QString::fromLatin1("CELT codec switch %1 %2 (prefer %3) (Opus %4)")
.arg(iCodecAlpha, 0, 16)
.arg(iCodecBeta, 0, 16)
.arg(bPreferAlpha ? iCodecAlpha : iCodecBeta, 0, 16)
.arg(bOpus));
}
void Server::hashAssign(QString &dest, QByteArray &hash, const QString &src) {
dest = src;
if (src.length() >= 128)
hash = sha1(src);
else
hash = QByteArray();
}
void Server::hashAssign(QByteArray &dest, QByteArray &hash, const QByteArray &src) {
dest = src;
if (src.length() >= 128)
hash = sha1(src);
else
hash = QByteArray();
}
bool Server::isTextAllowed(QString &text, bool &changed) {
changed = false;
if (!bAllowHTML) {
QString out;
if (HTMLFilter::filter(text, out)) {
changed = true;
text = out;
}
return ((iMaxTextMessageLength == 0) || (text.length() <= iMaxTextMessageLength));
} else {
int length = text.length();
// No limits
if ((iMaxTextMessageLength == 0) && (iMaxImageMessageLength == 0))
return true;
// Over Image limit? (If so, always fail)
if ((iMaxImageMessageLength != 0) && (length > iMaxImageMessageLength))
return false;
// Under textlength?
if ((iMaxTextMessageLength == 0) || (length <= iMaxTextMessageLength))
return true;
// Over textlength, under imagelength. If no XML, this is a fail.
if (!text.contains(QLatin1Char('<')))
return false;
// Strip value from <img>s src attributes to check text-length only -
// we already ensured the img-length requirement is met
QString qsOut;
QXmlStreamReader qxsr(QString::fromLatin1("<document>%1</document>").arg(text));
QXmlStreamWriter qxsw(&qsOut);
while (!qxsr.atEnd()) {
switch (qxsr.readNext()) {
case QXmlStreamReader::Invalid:
return false;
case QXmlStreamReader::StartElement: {
if (qxsr.name() == QLatin1String("img")) {
qxsw.writeStartElement(qxsr.namespaceUri().toString(), qxsr.name().toString());
foreach (const QXmlStreamAttribute &a, qxsr.attributes())
if (a.name() != QLatin1String("src"))
qxsw.writeAttribute(a);
} else {
qxsw.writeCurrentToken(qxsr);
}
} break;
default:
qxsw.writeCurrentToken(qxsr);
break;
}
}
length = qsOut.length();
return (length <= iMaxTextMessageLength);
}
}
bool Server::isChannelFull(Channel *c, ServerUser *u) {
if (u && hasPermission(u, c, ChanACL::Write)) {
return false;
}
if (c->uiMaxUsers) {
return static_cast< unsigned int >(c->qlUsers.count()) >= c->uiMaxUsers;
}
if (iMaxUsersPerChannel) {
return c->qlUsers.count() >= iMaxUsersPerChannel;
}
return false;
}
bool Server::canNest(Channel *newParent, Channel *channel) const {
const int parentLevel = newParent ? static_cast< int >(newParent->getLevel()) : -1;
const int channelDepth = channel ? static_cast< int >(channel->getDepth()) : 0;
return (parentLevel + channelDepth) < iChannelNestingLimit;
}
#undef SIO_UDP_CONNRESET
#undef SENDTO
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