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73a0b2f888
mumble/src/murmur/Server.cpp
MadMaurice 73a0b2f888 Make Rate limiter configurable. 
This adds messagelimit and messageburst to the configuration file murmur.ini as
well as the ability to set these live.

Though adjusting these live is entirely possible, they only take effect for new connections.
2018-09-08 01:58:23 +02:00

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// Copyright 2005-2018 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 "murmur_pch.h"
#include "Server.h"
#include "ACL.h"
#include "Connection.h"
#include "Group.h"
#include "User.h"
#include "Channel.h"
#include "Message.h"
#include "Meta.h"
#include "PacketDataStream.h"
#include "ServerDB.h"
#include "ServerUser.h"
#include "Version.h"
#include "HTMLFilter.h"
#include "HostAddress.h"
#ifdef USE_BONJOUR
#include "BonjourServer.h"
#include "BonjourServiceRegister.h"
#endif
#ifndef MAX
#define MAX(a,b) ((a)>(b) ? (a):(b))
#endif
#define UDP_PACKET_SIZE 1024
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) {
}
bool SslServer::hasDualStackSupport() {
// Create a AF_INET6 socket and try to switch off IPV6_V6ONLY. This
// should only fail if the system does not support dual-stack mode
// for this socket type.
bool result = false;
#ifdef Q_OS_UNIX
int s = ::socket(AF_INET6, SOCK_STREAM, 0);
if (s != -1) {
const int ipv6only = 0;
if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char*>(&ipv6only), sizeof(ipv6only)) == 0) {
result = true;
}
::close(s);
}
#else
WSADATA wsaData;
WORD wVersionRequested = MAKEWORD(2, 2);
if (WSAStartup(wVersionRequested, &wsaData) != 0) {
// Seems like we won't be doing any network stuff anyways
return false;
}
SOCKET s = ::WSASocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED);
if (s != INVALID_SOCKET) {
const int ipv6only = 0;
if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<const char*>(&ipv6only), sizeof(ipv6only)) == 0) {
result = true;
}
closesocket(s);
}
WSACleanup();
#endif
return result;
}
#if QT_VERSION >= 0x050000
void SslServer::incomingConnection(qintptr v) {
#else
void SslServer::incomingConnection(int v) {
#endif
QSslSocket *s = new QSslSocket(this);
s->setSocketDescriptor(v);
qlSockets.append(s);
}
QSslSocket *SslServer::nextPendingSSLConnection() {
if (qlSockets.isEmpty())
return NULL;
return qlSockets.takeFirst();
}
Server::Server(int snum, QObject *p) : QThread(p) {
bValid = true;
iServerNum = snum;
#ifdef USE_BONJOUR
bsRegistration = NULL;
#endif
bUsingMetaCert = false;
#ifdef Q_OS_UNIX
aiNotify[0] = aiNotify[1] = -1;
#else
hNotify = NULL;
#endif
qtTimeout = new QTimer(this);
iCodecAlpha = iCodecBeta = 0;
bPreferAlpha = false;
bOpus = true;
qnamNetwork = NULL;
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, NULL, 0, WSA_FLAG_OVERLAPPED);
DWORD dwBytesReturned = 0;
BOOL bNewBehaviour = FALSE;
if (WSAIoctl(sock, SIO_UDP_CONNRESET, &bNewBehaviour, sizeof(bNewBehaviour), NULL, 0, &dwBytesReturned, NULL, NULL) == 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(NULL, FALSE, FALSE, NULL);
#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);
uiVersionBlob = qToBigEndian(static_cast<quint32>((major<<16) | (minor << 8) | patch));
if (bValid) {
#ifdef USE_BONJOUR
if (bBonjour)
initBonjour();
#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_BONJOUR
removeBonjour();
#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 MumbleVersion::getRaw()
// will return the bitmasked representation.
//
// If it is not a version string, the call to MumbleVersion::getRaw()
// will return 0, so it is effectively a no-op.
if (integerValue == 0) {
integerValue = MumbleVersion::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;
qsWelcomeText = Meta::mp.qsWelcomeText;
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;
bCertRequired = Meta::mp.bCertRequired;
bForceExternalAuth = Meta::mp.bForceExternalAuth;
qrUserName = Meta::mp.qrUserName;
qrChannelName = Meta::mp.qrChannelName;
iMessageLimit = Meta::mp.iMessageLimit;
iMessageBurst = Meta::mp.iMessageBurst;
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();
foreach(const QString &host, qsHost.split(QRegExp(QLatin1String("\\s+")), QString::SkipEmptyParts)) {
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();
qsWelcomeText = getConf("welcometext", qsWelcomeText).toString();
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;
}
}
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 == "welcometext") {
QString text = !v.isNull() ? v : Meta::mp.qsWelcomeText;
if (text != qsWelcomeText) {
qsWelcomeText = text;
MumbleProto::ServerConfig mpsc;
mpsc.set_welcome_text(u8(qsWelcomeText));
sendAll(mpsc);
}
} 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_BONJOUR
if (bBonjour && !bsRegistration)
initBonjour();
else if (!bBonjour && bsRegistration)
removeBonjour();
#endif
} else if (key == "allowping")
bAllowPing = !v.isNull() ? QVariant(v).toBool() : Meta::mp.bAllowPing;
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_BONJOUR
void Server::initBonjour() {
bsRegistration = new BonjourServer();
if (bsRegistration->bsrRegister) {
log("Announcing server via bonjour");
bsRegistration->bsrRegister->registerService(BonjourRecord(qsRegName, "_mumble._tcp", ""),
usPort);
}
}
void Server::removeBonjour() {
if (bsRegistration) {
delete bsRegistration;
bsRegistration = NULL;
log("Stopped announcing server via bonjour");
}
}
#endif
void Server::customEvent(QEvent *evt) {
if (evt->type() == EXEC_QEVENT)
static_cast<ExecEvent *>(evt)->execute();
}
void Server::udpActivated(int socket) {
qint32 len;
char encrypt[UDP_PACKET_SIZE];
sockaddr_storage from;
#ifdef Q_OS_UNIX
#ifdef Q_OS_LINUX
struct msghdr msg;
struct iovec iov[1];
iov[0].iov_base = encrypt;
iov[0].iov_len = UDP_PACKET_SIZE;
u_char controldata[CMSG_SPACE(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, encrypt, UDP_PACKET_SIZE, MSG_TRUNC, reinterpret_cast<struct sockaddr *>(&from), &fromlen));
#endif
#else
int fromlen = sizeof(from);
SOCKET sock = static_cast<SOCKET>(socket);
len=::recvfrom(sock, encrypt, UDP_PACKET_SIZE, 0, reinterpret_cast<struct sockaddr *>(&from), &fromlen);
#endif
// Cloned from ::run(), as it's the only UDP data we care about until the thread is started.
quint32 *ping = reinterpret_cast<quint32 *>(encrypt);
if ((len == 12) && (*ping == 0) && bAllowPing) {
ping[0] = uiVersionBlob;
ping[3] = qToBigEndian(static_cast<quint32>(qhUsers.count()));
ping[4] = qToBigEndian(static_cast<quint32>(iMaxUsers));
ping[5] = qToBigEndian(static_cast<quint32>(iMaxBandwidth));
#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 = 6 * sizeof(quint32);
::sendmsg(sock, &msg, 0);
#else
::sendto(sock, encrypt, 6 * sizeof(quint32), 0, reinterpret_cast<struct sockaddr *>(&from), fromlen);
#endif
}
}
void Server::run() {
qint32 len;
#if defined(__LP64__)
char encbuff[UDP_PACKET_SIZE+8];
char *encrypt = encbuff + 4;
#else
char encrypt[UDP_PACKET_SIZE];
#endif
char buffer[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(NULL, FALSE, FALSE, NULL);
::WSAEventSelect(fds[i], events[i], FD_READ);
}
events[nfds] = hNotify;
#endif
++nfds;
while (bRunning) {
#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, encrypt, 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 = UDP_PACKET_SIZE;
u_char controldata[CMSG_SPACE(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, UDP_PACKET_SIZE, MSG_TRUNC, reinterpret_cast<struct sockaddr *>(&from), &fromlen));
#endif
#endif
if (len == 0) {
break;
} else if (len == SOCKET_ERROR) {
break;
} else if (len < 5) {
// 4 bytes crypt header + type + session
continue;
} else if (len > UDP_PACKET_SIZE) {
continue;
}
QReadLocker rl(&qrwlVoiceThread);
quint32 *ping = reinterpret_cast<quint32 *>(encrypt);
if ((len == 12) && (*ping == 0) && bAllowPing) {
ping[0] = uiVersionBlob;
// 1 and 2 will be the timestamp, which we return unmodified.
ping[3] = qToBigEndian(static_cast<quint32>(qhUsers.count()));
ping[4] = qToBigEndian(static_cast<quint32>(iMaxUsers));
ping[5] = qToBigEndian(static_cast<quint32>(iMaxBandwidth));
#ifdef Q_OS_LINUX
iov[0].iov_len = 6 * sizeof(quint32);
::sendmsg(sock, &msg, 0);
#else
::sendto(sock, encrypt, 6 * sizeof(quint32), 0, reinterpret_cast<struct sockaddr *>(&from), fromlen);
#endif
continue;
}
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) {
if (! checkDecrypt(u, encrypt, buffer, len)) {
continue;
}
} else {
// 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' existance.
// 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 != NULL && !qhUsers.contains(uiSession))
u = NULL;
break;
}
}
if (! u) {
continue;
}
}
len -= 4;
MessageHandler::UDPMessageType msgType = static_cast<MessageHandler::UDPMessageType>((buffer[0] >> 5) & 0x7);
if (msgType == MessageHandler::UDPVoiceSpeex ||
msgType == MessageHandler::UDPVoiceCELTAlpha ||
msgType == MessageHandler::UDPVoiceCELTBeta ||
msgType == MessageHandler::UDPVoiceOpus) {
// 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 && msgType != MessageHandler::UDPVoiceOpus) {
ok = false;
}
if (ok) {
u->aiUdpFlag = 1;
processMsg(u, buffer, len);
}
} else if (msgType == MessageHandler::UDPPing) {
QByteArray qba;
sendMessage(u, buffer, len, qba, true);
}
#ifdef Q_OS_UNIX
fds[i].revents = 0;
#endif
}
}
}
#ifdef Q_OS_WIN
for (int i=0;i<nfds-1;++i) {
::WSAEventSelect(fds[i], NULL, 0);
CloseHandle(events[i]);
}
#endif
}
bool Server::checkDecrypt(ServerUser *u, const char *encrypt, char *plain, unsigned int len) {
QMutexLocker l(&u->qmCrypt);
if (u->csCrypt.isValid() && u->csCrypt.decrypt(reinterpret_cast<const unsigned char *>(encrypt), reinterpret_cast<unsigned char *>(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 char *data, int len, QByteArray &cache, bool force) {
if ((QAtomicIntLoad(u->aiUdpFlag) == 1 || force) && (u->sUdpSocket != INVALID_SOCKET)) {
#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;
}
u->csCrypt.encrypt(reinterpret_cast<const unsigned char *>(data), reinterpret_cast<unsigned char *>(buffer),
len);
}
#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;
u_char controldata[CMSG_SPACE(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(data, len);
emit tcpTransmit(cache,u->uiSession);
}
}
#define SENDTO \
if ((!pDst->bDeaf) && (!pDst->bSelfDeaf) && (pDst != u)) { \
if ((poslen > 0) && (pDst->ssContext == u->ssContext)) \
sendMessage(pDst, buffer, len, qba); \
else \
sendMessage(pDst, buffer, len - poslen, qba_npos); \
}
void Server::processMsg(ServerUser *u, const char *data, int len) {
if (u->sState != ServerUser::Authenticated || u->bMute || u->bSuppress || u->bSelfMute)
return;
QByteArray qba, qba_npos;
unsigned int counter;
char buffer[UDP_PACKET_SIZE];
PacketDataStream pdi(data + 1, len - 1);
PacketDataStream pds(buffer+1, UDP_PACKET_SIZE-1);
unsigned int type = data[0] & 0xe0;
unsigned int target = data[0] & 0x1f;
unsigned int poslen;
// Check the voice data rate limit.
{
BandwidthRecord *bw = &u->bwr;
// IP + UDP + Crypt + Data
const int packetsize = 20 + 8 + 4 + len;
if (! bw->addFrame(packetsize, iMaxBandwidth / 8)) {
// Suppress packet.
return;
}
}
// Read the sequence number.
pdi >> counter;
// Skip to the end of the voice data.
if ((type >> 5) != MessageHandler::UDPVoiceOpus) {
do {
counter = pdi.next8();
pdi.skip(counter & 0x7f);
} while ((counter & 0x80) && pdi.isValid());
} else {
int size;
pdi >> size;
pdi.skip(size & 0x1fff);
}
// Save location of the positional audio data.
poslen = pdi.left();
// Append session id to the new output stream.
pds << u->uiSession;
// Copy all voice and positional audio data to the output stream.
pds.append(data + 1, len - 1);
len = pds.size() + 1;
if (target == 0x1f) { // Server loopback
buffer[0] = static_cast<char>(type | 0);
sendMessage(u, buffer, len, qba);
return;
} else if (target == 0) { // Normal speech
Channel *c = u->cChannel;
buffer[0] = static_cast<char>(type | 0);
foreach(User *p, c->qlUsers) {
ServerUser *pDst = static_cast<ServerUser *>(p);
SENDTO;
}
if (! c->qhLinks.isEmpty()) {
QSet<Channel *> chans = c->allLinks();
chans.remove(c);
QMutexLocker qml(&qmCache);
foreach(Channel *l, chans) {
if (ChanACL::hasPermission(u, l, ChanACL::Speak, &acCache)) {
foreach(User *p, l->qlUsers) {
ServerUser *pDst = static_cast<ServerUser *>(p);
SENDTO;
}
}
}
}
} else if (u->qmTargets.contains(target)) { // Whisper
QSet<ServerUser *> channel;
QSet<ServerUser *> direct;
if (u->qmTargetCache.contains(target)) {
const ServerUser::TargetCache &cache = u->qmTargetCache.value(target);
channel = cache.first;
direct = cache.second;
} else {
const WhisperTarget &wt = u->qmTargets.value(target);
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));
}
}
} 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);
}
}
}
}
}
}
}
}
{
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(target, ServerUser::TargetCache(channel, direct));
qrwlVoiceThread.unlock();
qrwlVoiceThread.lockForRead();
if (! qhUsers.contains(uiSession))
return;
}
if (! channel.isEmpty()) {
buffer[0] = static_cast<char>(type | 1);
foreach(ServerUser *pDst, channel) {
SENDTO;
}
if (! direct.isEmpty()) {
qba.clear();
qba_npos.clear();
}
}
if (! direct.isEmpty()) {
buffer[0] = static_cast<char>(type | 2);
foreach(ServerUser *pDst, direct) {
SENDTO;
}
}
}
}
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;
}
}
sock->setPrivateKey(qskKey);
sock->setLocalCertificate(qscCert);
// 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);
sock->setCiphers(Meta::mp.qlCiphers);
#if defined(USE_QSSLDIFFIEHELLMANPARAMETERS)
QSslConfiguration cfg = sock->sslConfiguration();
cfg.setDiffieHellmanParameters(qsdhpDHParams);
sock->setSslConfiguration(cfg);
#endif
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->uiSession = qqIds.dequeue();
u->haAddress = ha;
HostAddress(sock->localAddress()).toSockaddr(& u->saiTcpLocalAddress);
{
QWriteLocker wl(&qrwlVoiceThread);
qhUsers.insert(u->uiSession, u);
qhHostUsers[ha].insert(u);
}
connect(u, SIGNAL(connectionClosed(QAbstractSocket::SocketError, const QString &)), this, SLOT(connectionClosed(QAbstractSocket::SocketError, const QString &)));
connect(u, SIGNAL(message(unsigned int, const QByteArray &)), this, SLOT(message(unsigned int, const QByteArray &)));
connect(u, SIGNAL(handleSslErrors(const QList<QSslError> &)), this, SLOT(sslError(const QList<QSslError> &)));
connect(u, SIGNAL(encrypted()), this, SLOT(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);
#elif QT_VERSION >= 0x050000
sock->setProtocol(QSsl::TlsV1_0);
#else
sock->setProtocol(QSsl::TlsV1);
#endif
sock->startServerEncryption();
}
}
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()) {
const QSslCertificate &cert = certs.last();
#if QT_VERSION >= 0x050000
uSource->qslEmail = cert.subjectAlternativeNames().values(QSsl::EmailEntry);
#else
uSource->qslEmail = cert.alternateSubjectNames().values(QSsl::EmailEntry);
#endif
uSource->qsHash = cert.digest(QCryptographicHash::Sha1).toHex();
if (! uSource->qslEmail.isEmpty() && uSource->bVerified) {
#if QT_VERSION >= 0x050000
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();
}
#else
QString subject = cert.subjectInfo(QSslCertificate::CommonName);
QString issuer = certs.first().issuerInfo(QSslCertificate::CommonName);
#endif
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::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, inlcuding the 'SSL *' object
// associated with the socket, this is fatal and leads
// to crashes, such as attempting to derefernce a NULL
// '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
#if QT_VERSION >= 0x050000
u->disconnectSocket();
#else
u->disconnectSocket(true);
#endif
}
}
void Server::connectionClosed(QAbstractSocket::SocketError err, const QString &reason) {
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));
if (u->sState == ServerUser::Authenticated) {
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 (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(unsigned int uiType, const QByteArray &qbaMsg, ServerUser *u) {
if (u == NULL) {
u = static_cast<ServerUser *>(sender());
}
if (u->sState == ServerUser::Authenticated) {
u->resetActivityTime();
}
if (uiType == MessageHandler::UDPTunnel) {
int len = qbaMsg.size();
if (len < 2)
return;
QReadLocker rl(&qrwlVoiceThread);
u->aiUdpFlag = 0;
const char *buffer = qbaMsg.constData();
MessageHandler::UDPMessageType msgType = static_cast<MessageHandler::UDPMessageType>((buffer[0] >> 5) & 0x7);
if (msgType == MessageHandler::UDPVoiceSpeex ||
msgType == MessageHandler::UDPVoiceCELTAlpha ||
msgType == MessageHandler::UDPVoiceCELTBeta ||
msgType == MessageHandler::UDPVoiceOpus) {
// 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 && msgType != MessageHandler::UDPVoiceOpus) {
ok = false;
}
if (ok) {
processMsg(u, buffer, len);
}
}
return;
}
#ifdef QT_NO_DEBUG
#define MUMBLE_MH_MSG(x) case MessageHandler:: x : { \
MumbleProto:: x msg; \
if (msg.ParseFromArray(qbaMsg.constData(), qbaMsg.size())) { \
msg.DiscardUnknownFields(); \
msg##x(u, msg); \
} \
break; \
}
#else
#define MUMBLE_MH_MSG(x) case MessageHandler:: x : { \
MumbleProto:: x msg; \
if (msg.ParseFromArray(qbaMsg.constData(), qbaMsg.size())) { \
if (uiType != MessageHandler::Ping) { \
printf("== %s:\n", #x); \
msg.PrintDebugString(); \
} \
msg.DiscardUnknownFields(); \
msg##x(u, msg); \
} \
break; \
}
#endif
switch (uiType) {
MUMBLE_MH_ALL
}
}
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>(MessageHandler::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, unsigned int msgType) {
QByteArray cache;
u->sendMessage(msg, msgType, cache);
}
void Server::sendProtoAll(const ::google::protobuf::Message &msg, unsigned int msgType, unsigned int version) {
sendProtoExcept(NULL, msg, msgType, version);
}
void Server::sendProtoExcept(ServerUser *u, const ::google::protobuf::Message &msg, unsigned int 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 == NULL)
dest = chan->cParent;
{
QWriteLocker wl(&qrwlVoiceThread);
chan->unlink(NULL);
}
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))
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);
}
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, NULL);
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);
}
}
{
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(h.result().toHex()), QString::number(port));
}
return QString("%1:%2").arg(ha.toString(), QString::number(port));
}
bool Server::validateUserName(const QString &name) {
return (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(NULL, 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(NULL, 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;
}
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