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Merge #11809: gui: Fix proxy setting options dialog crash 

f05d349 gui: Fix proxy setting options dialog crash (Wladimir J. van der Laan)

Pull request description:

  This fixes a crash bug when opening the options dialog.

  - Check the return value of split() to avoid segmentation faults due to   out of bounds when the user manages to enter invalid proxy settings.  This is reported resonably often.

  - Move the default proxy/port to a constant instead of hardcoding magic values.

  - Factor out some common code.

  - Revert #11448 because this proves a more robust replacement, it is no longer necessary and didn't generally solve the issue.

  No attempt is made to do full sanity checking on the proxy, so it can still be rejected by the core with an InitError message.

Tree-SHA512: 72b700b7d6c4d3e3410f0c60e9e4facf93d7c6c1a1b6b23957c48b074a045970f518166952859d1ebca8620062cb70d222670a7310bbd6fe50550ec6d04417b5
0.16
Wladimir J. van der Laan 7 years ago
parent
3e50024120 f05d349887
commit
80f9dad0b7
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GPG Key ID: 1E4AED62986CD25D
3 changed files with 61 additions and 53 deletions
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  1. 2
      src/qt/optionsdialog.cpp
  2. 109
      src/qt/optionsmodel.cpp
  3. 3
      src/qt/optionsmodel.h

2
src/qt/optionsdialog.cpp
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@ -338,7 +338,7 @@ QValidator::State ProxyAddressValidator::validate(QString &input, int &pos) cons @@ -338,7 +338,7 @@ QValidator::State ProxyAddressValidator::validate(QString &input, int &pos) cons
{
Q_UNUSED(pos);
// Validate the proxy
CService serv(LookupNumeric(input.toStdString().c_str(), 9050));
CService serv(LookupNumeric(input.toStdString().c_str(), DEFAULT_GUI_PROXY_PORT));
proxyType addrProxy = proxyType(serv, true);
if (addrProxy.IsValid())
return QValidator::Acceptable;

109
src/qt/optionsmodel.cpp
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@ -28,6 +28,8 @@ @@ -28,6 +28,8 @@
#include <QSettings>
#include <QStringList>
const char *DEFAULT_GUI_PROXY_HOST = "127.0.0.1";
OptionsModel::OptionsModel(QObject *parent, bool resetSettings) :
QAbstractListModel(parent)
{
@ -124,8 +126,8 @@ void OptionsModel::Init(bool resetSettings) @@ -124,8 +126,8 @@ void OptionsModel::Init(bool resetSettings)
if (!settings.contains("fUseProxy"))
settings.setValue("fUseProxy", false);
if (!settings.contains("addrProxy") || !settings.value("addrProxy").toString().contains(':'))
settings.setValue("addrProxy", "127.0.0.1:9050");
if (!settings.contains("addrProxy"))
settings.setValue("addrProxy", QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST, DEFAULT_GUI_PROXY_PORT));
// Only try to set -proxy, if user has enabled fUseProxy
if (settings.value("fUseProxy").toBool() && !gArgs.SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString()))
addOverriddenOption("-proxy");
@ -134,8 +136,8 @@ void OptionsModel::Init(bool resetSettings) @@ -134,8 +136,8 @@ void OptionsModel::Init(bool resetSettings)
if (!settings.contains("fUseSeparateProxyTor"))
settings.setValue("fUseSeparateProxyTor", false);
if (!settings.contains("addrSeparateProxyTor") || !settings.value("addrSeparateProxyTor").toString().contains(':'))
settings.setValue("addrSeparateProxyTor", "127.0.0.1:9050");
if (!settings.contains("addrSeparateProxyTor"))
settings.setValue("addrSeparateProxyTor", QString("%1:%2").arg(DEFAULT_GUI_PROXY_HOST, DEFAULT_GUI_PROXY_PORT));
// Only try to set -onion, if user has enabled fUseSeparateProxyTor
if (settings.value("fUseSeparateProxyTor").toBool() && !gArgs.SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
addOverriddenOption("-onion");
@ -200,6 +202,33 @@ int OptionsModel::rowCount(const QModelIndex & parent) const @@ -200,6 +202,33 @@ int OptionsModel::rowCount(const QModelIndex & parent) const
return OptionIDRowCount;
}
struct ProxySetting {
bool is_set;
QString ip;
QString port;
};
static ProxySetting GetProxySetting(QSettings &settings, const QString &name)
{
static const ProxySetting default_val = {false, DEFAULT_GUI_PROXY_HOST, QString("%1").arg(DEFAULT_GUI_PROXY_PORT)};
// Handle the case that the setting is not set at all
if (!settings.contains(name)) {
return default_val;
}
// contains IP at index 0 and port at index 1
QStringList ip_port = settings.value(name).toString().split(":", QString::SkipEmptyParts);
if (ip_port.size() == 2) {
return {true, ip_port.at(0), ip_port.at(1)};
} else { // Invalid: return default
return default_val;
}
}
static void SetProxySetting(QSettings &settings, const QString &name, const ProxySetting &ip_port)
{
settings.setValue(name, ip_port.ip + ":" + ip_port.port);
}
// read QSettings values and return them
QVariant OptionsModel::data(const QModelIndex & index, int role) const
{
@ -226,30 +255,18 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const @@ -226,30 +255,18 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const
// default proxy
case ProxyUse:
return settings.value("fUseProxy", false);
case ProxyIP: {
// contains IP at index 0 and port at index 1
QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
return strlIpPort.at(0);
}
case ProxyPort: {
// contains IP at index 0 and port at index 1
QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
return strlIpPort.at(1);
}
case ProxyIP:
return GetProxySetting(settings, "addrProxy").ip;
case ProxyPort:
return GetProxySetting(settings, "addrProxy").port;
// separate Tor proxy
case ProxyUseTor:
return settings.value("fUseSeparateProxyTor", false);
case ProxyIPTor: {
// contains IP at index 0 and port at index 1
QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
return strlIpPort.at(0);
}
case ProxyPortTor: {
// contains IP at index 0 and port at index 1
QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
return strlIpPort.at(1);
}
case ProxyIPTor:
return GetProxySetting(settings, "addrSeparateProxyTor").ip;
case ProxyPortTor:
return GetProxySetting(settings, "addrSeparateProxyTor").port;
#ifdef ENABLE_WALLET
case SpendZeroConfChange:
@ -314,25 +331,19 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in @@ -314,25 +331,19 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
}
break;
case ProxyIP: {
// contains current IP at index 0 and current port at index 1
QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
// if that key doesn't exist or has a changed IP
if (!settings.contains("addrProxy") || strlIpPort.at(0) != value.toString()) {
// construct new value from new IP and current port
QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
settings.setValue("addrProxy", strNewValue);
auto ip_port = GetProxySetting(settings, "addrProxy");
if (!ip_port.is_set || ip_port.ip != value.toString()) {
ip_port.ip = value.toString();
SetProxySetting(settings, "addrProxy", ip_port);
setRestartRequired(true);
}
}
break;
case ProxyPort: {
// contains current IP at index 0 and current port at index 1
QStringList strlIpPort = settings.value("addrProxy").toString().split(":", QString::SkipEmptyParts);
// if that key doesn't exist or has a changed port
if (!settings.contains("addrProxy") || strlIpPort.at(1) != value.toString()) {
// construct new value from current IP and new port
QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
settings.setValue("addrProxy", strNewValue);
auto ip_port = GetProxySetting(settings, "addrProxy");
if (!ip_port.is_set || ip_port.port != value.toString()) {
ip_port.port = value.toString();
SetProxySetting(settings, "addrProxy", ip_port);
setRestartRequired(true);
}
}
@ -346,25 +357,19 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in @@ -346,25 +357,19 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
}
break;
case ProxyIPTor: {
// contains current IP at index 0 and current port at index 1
QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
// if that key doesn't exist or has a changed IP
if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(0) != value.toString()) {
// construct new value from new IP and current port
QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
settings.setValue("addrSeparateProxyTor", strNewValue);
auto ip_port = GetProxySetting(settings, "addrSeparateProxyTor");
if (!ip_port.is_set || ip_port.ip != value.toString()) {
ip_port.ip = value.toString();
SetProxySetting(settings, "addrSeparateProxyTor", ip_port);
setRestartRequired(true);
}
}
break;
case ProxyPortTor: {
// contains current IP at index 0 and current port at index 1
QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
// if that key doesn't exist or has a changed port
if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(1) != value.toString()) {
// construct new value from current IP and new port
QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
settings.setValue("addrSeparateProxyTor", strNewValue);
auto ip_port = GetProxySetting(settings, "addrSeparateProxyTor");
if (!ip_port.is_set || ip_port.port != value.toString()) {
ip_port.port = value.toString();
SetProxySetting(settings, "addrSeparateProxyTor", ip_port);
setRestartRequired(true);
}
}

3
src/qt/optionsmodel.h
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@ -13,6 +13,9 @@ QT_BEGIN_NAMESPACE @@ -13,6 +13,9 @@ QT_BEGIN_NAMESPACE
class QNetworkProxy;
QT_END_NAMESPACE
extern const char *DEFAULT_GUI_PROXY_HOST;
static constexpr unsigned short DEFAULT_GUI_PROXY_PORT = 9050;
/** Interface from Qt to configuration data structure for Bitcoin client.
To Qt, the options are presented as a list with the different options
laid out vertically.

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