pica-client: implemented autoconfiguration of address for direct incoming connections

4 files changed, 86 insertions, 7 deletions

diff --git a/pica-client/dialogs/settingsdialog.cpp b/pica-client/dialogs/settingsdialog.cpp
index d16bb63..1bd7812 100644
--- a/pica-client/dialogs/settingsdialog.cpp
+++ b/pica-client/dialogs/settingsdialog.cpp
@@ -1,6 +1,7 @@
 #include "settingsdialog.h"
 #include "../settings.h"
 #include "../globals.h"
+#include "../../PICA_netconf.h"
 
 #include <QGroupBox>
 #include <QVBoxLayout>
@@ -28,6 +29,11 @@ SettingsDialog::SettingsDialog(QWidget *parent) :
 	rbEnableOutgoingConns = new QRadioButton(tr("Connect to the remote peer directly if possible"), this);
 	rbEnableIncomingConns = new QRadioButton(tr("Enable incoming direct connections"), this);
 
+#ifdef HAVE_LIBMINIUPNPC
+	cbEnableUPnP = new QCheckBox(tr("Enable UPnP"));
+	cbEnableUPnP->setChecked(true);
+#endif
+
 	rbEnableIncomingConns->setChecked(true);
 	connect(rbEnableIncomingConns, SIGNAL(toggled(bool)), this, SLOT(toggleIncomingConnections(bool)));
 
@@ -49,6 +55,8 @@ SettingsDialog::SettingsDialog(QWidget *parent) :
 	QList<QHostAddress> hostIfAddrs = QNetworkInterface::allAddresses();
 	QHostAddress ifAddr;
 
+	addr->addItem(QString("autoconfigure"));
+
 	foreach (ifAddr, hostIfAddrs)
 		if (ifAddr.protocol() == QAbstractSocket::IPv4Protocol)
 			addr->addItem(ifAddr.toString());
@@ -57,6 +65,9 @@ SettingsDialog::SettingsDialog(QWidget *parent) :
 	directc2cLayout->addWidget(rbDisableDirectConns);
 	directc2cLayout->addWidget(rbEnableOutgoingConns);
 	directc2cLayout->addWidget(rbEnableIncomingConns);
+#ifdef HAVE_LIBMINIUPNPC
+	directc2cLayout->addWidget(cbEnableUPnP);
+#endif
 	directc2cLayout->addWidget(lbAddr);
 	directc2cLayout->addWidget(addr);
 	directc2cLayout->addWidget(lbPubPort);
@@ -99,6 +110,9 @@ void SettingsDialog::toggleIncomingConnections(bool checked)
 	addr->setEnabled(checked);
 	publicPort->setEnabled(checked);
 	localPort->setEnabled(checked);
+#ifdef HAVE_LIBMINIUPNPC
+	cbEnableUPnP->setEnabled(checked);
+#endif
 }
 
 void SettingsDialog::OK()
@@ -139,7 +153,37 @@ void SettingsDialog::loadSettings()
 		break;
 	}
 
-	addr->lineEdit()->setText(st.loadValue("direct_c2c.public_addr", "0.0.0.0").toString());
+#ifdef HAVE_LIBMINIUPNPC
+	cbEnableUPnP->setChecked(st.loadValue("direct_c2c.upnp_enabled", 1).toBool());
+#endif
+
+	addr->lineEdit()->setText(st.loadValue("direct_c2c.public_addr", "autoconfigure").toString());
+
+	if (addr->lineEdit()->text().contains(QString("autoconfigure")))
+	{
+		in_addr_t guess;
+		struct in_addr in;
+
+		guess = PICA_guess_listening_addr_ipv4();
+		in.s_addr = guess;
+		addr->lineEdit()->setText(QString("autoconfigured(%1)").arg(inet_ntoa(in)));
+
+#ifdef HAVE_LIBMINIUPNPC
+		if (cbEnableUPnP->isChecked() && PICA_is_reserved_addr_ipv4(guess))
+		{
+			int ret;
+			char public_ip[64];
+			ret = PICA_upnp_autoconfigure_ipv4(st.loadValue("direct_c2c.public_port", 2298).toInt(),
+												st.loadValue("direct_c2c.local_port", 2298).toInt(),
+												public_ip);
+
+			if (ret)
+			{
+				addr->lineEdit()->setText(QString("autoconfigured(%1)").arg(public_ip));
+			}
+		}
+#endif
+	}
 
 	publicPort->setValue(st.loadValue("direct_c2c.public_port", 2298).toInt());
 	localPort->setValue(st.loadValue("direct_c2c.local_port", 2298).toInt());
@@ -162,6 +206,10 @@ void SettingsDialog::storeSettings()
 
 	st.storeValue("direct_c2c.state", QString::number(c2c_state));
 
+#ifdef HAVE_LIBMINIUPNPC
+	st.storeValue("direct_c2c.upnp_enabled", cbEnableUPnP->isChecked() ? "1" : "0");
+#endif
+
 	st.storeValue("direct_c2c.public_addr", addr->lineEdit()->text());
 	st.storeValue("direct_c2c.public_port", QString::number(publicPort->value()));
 	st.storeValue("direct_c2c.local_port", QString::number(localPort->value()));
diff --git a/pica-client/dialogs/settingsdialog.h b/pica-client/dialogs/settingsdialog.h
index f0ab0cd..233fd3e 100644
--- a/pica-client/dialogs/settingsdialog.h
+++ b/pica-client/dialogs/settingsdialog.h
@@ -7,6 +7,7 @@
 #include <QSpinBox>
 #include <QRadioButton>
 #include <QComboBox>
+#include <QCheckBox>
 
 class SettingsDialog : public QDialog
 {
@@ -23,6 +24,9 @@ private:
 	QRadioButton *rbDisableDirectConns;
 	QRadioButton *rbEnableOutgoingConns;
 	QRadioButton *rbEnableIncomingConns;
+#ifdef HAVE_LIBMINIUPNPC
+	QCheckBox *cbEnableUPnP;
+#endif
 
 	QComboBox *addr;
 	QSpinBox *publicPort;
diff --git a/pica-client/pica-client.pro b/pica-client/pica-client.pro
index ef9f9fd..205d215 100644
--- a/pica-client/pica-client.pro
+++ b/pica-client/pica-client.pro
@@ -38,7 +38,8 @@ SOURCES += main.cpp\
     filetransfercontroller.cpp \
     sound.cpp \
     dialogs/settingsdialog.cpp \
-    settings.cpp
+    settings.cpp \
+    ../PICA_netconf.c
 
 HEADERS  += mainwindow.h \
     chatwindow.h \
@@ -70,10 +71,12 @@ HEADERS  += mainwindow.h \
     filetransfercontroller.h \
     sound.h \
     dialogs/settingsdialog.h \
-    settings.h
+    settings.h \
+    ../PICA_netconf.h
 
 
 DEFINES = PICA_MULTITHREADED
+DEFINES += HAVE_LIBMINIUPNPC
 
 FORMS    += mainwindow.ui
 
@@ -85,6 +88,4 @@ unix: PKGCONFIG += libssl
 unix: CONFIG += link_pkgconfig
 unix: PKGCONFIG += libcrypto
 
-
-
-
+unix|win32: LIBS += -lminiupnpc
diff --git a/pica-client/skynet.cpp b/pica-client/skynet.cpp
index 8e22635..d2abb64 100644
--- a/pica-client/skynet.cpp
+++ b/pica-client/skynet.cpp
@@ -11,6 +11,7 @@
 #include "dhparam.h"
 #include "askpassword.h"
 #include "settings.h"
+#include "../PICA_netconf.h"
 
 SkyNet::SkyNet()
 	: nodes(config_dbname), QObject(0)
@@ -345,9 +346,34 @@ void SkyNet::Join(Accounts::AccountRecord &accrec)
 	{
 		int pub_port = st.loadValue("direct_c2c.public_port", 2298).toInt();
 		int loc_port = st.loadValue("direct_c2c.local_port", 2298).toInt();
+		QString public_addr = st.loadValue("direct_c2c.public_addr", "autoconfigure").toString();
+
+		if (public_addr.contains("autoconfigure"))
+		{
+			in_addr_t guess;
+			struct in_addr in;
+
+			guess = PICA_guess_listening_addr_ipv4();
+			in.s_addr = guess;
+			public_addr = QString(inet_ntoa(in));
+#ifdef HAVE_LIBMINIUPNPC
+			if (st.loadValue("direct_c2c.upnp_enabled", 1).toBool() && PICA_is_reserved_addr_ipv4(guess))
+			{
+				int ret;
+				char public_ip[64];
+				ret = PICA_upnp_autoconfigure_ipv4(pub_port, loc_port, public_ip);
+
+				if (ret)
+				{
+					public_addr = QString(public_ip);
+				}
+			}
+#endif
+			emit StatusMsg(QString(tr("Using autoconfigured address %1 port %2 for incoming direct connections")).arg(public_addr).arg(pub_port), false);
+		}
 
 		int ret = PICA_new_listener(acc,
-		                            st.loadValue("direct_c2c.public_addr", "0.0.0.0").toString().toAscii().constData(),
+									public_addr.toAscii().constData(),
 		                            pub_port,
 		                            loc_port, &listener);
 		if (ret != PICA_OK)