Merge pull request #10493 from jordan-woyak/netplay-show-traversal-external-port

NetPlayDialog: Display external IP/Port as seen by the traversal server.

Source/Core/Common/TraversalClient.cpp

@@ -29,6 +29,11 @@ TraversalHostId TraversalClient::GetHostID() const
   return m_HostId;
 }
 
+TraversalInetAddress TraversalClient::GetExternalAddress() const
+{
+  return m_external_address;
+}
+
 TraversalClient::State TraversalClient::GetState() const
 {
   return m_State;
@@ -153,6 +158,7 @@ void TraversalClient::HandleServerPacket(TraversalPacket* packet)
       break;
     }
     m_HostId = packet->helloFromServer.yourHostId;
+    m_external_address = packet->helloFromServer.yourAddress;
     m_State = State::Connected;
     if (m_Client)
       m_Client->OnTraversalStateChanged();

Source/Core/Common/TraversalClient.h

@@ -44,6 +44,7 @@ public:
   ~TraversalClient();
 
   TraversalHostId GetHostID() const;
+  TraversalInetAddress GetExternalAddress() const;
   State GetState() const;
   FailureReason GetFailureReason() const;
 
@@ -77,6 +78,7 @@ private:
 
   ENetHost* m_NetHost;
   TraversalHostId m_HostId{};
+  TraversalInetAddress m_external_address{};
   State m_State{};
   FailureReason m_FailureReason{};
   TraversalRequestId m_ConnectRequestId = 0;

Source/Core/Common/TraversalProto.h

@@ -69,7 +69,7 @@ struct TraversalPacket
     {
       u8 ok;
       TraversalHostId yourHostId;
-      TraversalInetAddress yourAddress;  // currently unused
+      TraversalInetAddress yourAddress;
     } helloFromServer;
     struct
     {

Source/Core/DolphinQt/NetPlay/NetPlayDialog.cpp

@@ -64,6 +64,31 @@
 #include "VideoCommon/RenderBase.h"
 #include "VideoCommon/VideoConfig.h"
 
+namespace
+{
+QString InetAddressToString(const TraversalInetAddress& addr)
+{
+  QString ip;
+
+  if (addr.isIPV6)
+  {
+    ip = QStringLiteral("IPv6-Not-Implemented");
+  }
+  else
+  {
+    const auto ipv4 = reinterpret_cast<const u8*>(addr.address);
+    ip = QString::number(ipv4[0]);
+    for (u32 i = 1; i != 4; ++i)
+    {
+      ip += QStringLiteral(".");
+      ip += QString::number(ipv4[i]);
+    }
+  }
+
+  return QStringLiteral("%1:%2").arg(ip, QString::number(ntohs(addr.port)));
+}
+}  // namespace
+
 NetPlayDialog::NetPlayDialog(const GameListModel& game_list_model,
                              StartGameCallback start_game_callback, QWidget* parent)
     : QDialog(parent), m_game_list_model(game_list_model),
@@ -270,7 +295,7 @@ void NetPlayDialog::ConnectWidgets()
   connect(m_room_box, qOverload<int>(&QComboBox::currentIndexChanged), this,
           &NetPlayDialog::UpdateGUI);
   connect(m_hostcode_action_button, &QPushButton::clicked, [this] {
-    if (m_is_copy_button_retry && m_room_box->currentIndex() == 0)
+    if (m_is_copy_button_retry)
       g_TraversalClient->ReconnectToServer();
     else
       QApplication::clipboard()->setText(m_hostcode_label->text());
@@ -622,20 +647,48 @@ void NetPlayDialog::UpdateGUI()
       m_players_list->selectRow(i);
   }
 
-  // Update Room ID / IP label
-  if (m_use_traversal && m_room_box->currentIndex() == 0)
+  if (m_old_player_count != m_player_count)
+  {
+    UpdateDiscordPresence();
+    m_old_player_count = m_player_count;
+  }
+
+  if (!server)
+    return;
+
+  const bool is_local_ip_selected = m_room_box->currentIndex() > (m_use_traversal ? 1 : 0);
+  if (is_local_ip_selected)
+  {
+    m_hostcode_label->setText(QString::fromStdString(
+        server->GetInterfaceHost(m_room_box->currentData().toString().toStdString())));
+    m_hostcode_action_button->setEnabled(true);
+    m_hostcode_action_button->setText(tr("Copy"));
+    m_is_copy_button_retry = false;
+  }
+  else if (m_use_traversal)
   {
     switch (g_TraversalClient->GetState())
     {
     case TraversalClient::State::Connecting:
-      m_hostcode_label->setText(tr("..."));
+      m_hostcode_label->setText(tr("Connecting"));
       m_hostcode_action_button->setEnabled(false);
+      m_hostcode_action_button->setText(tr("..."));
       break;
     case TraversalClient::State::Connected:
     {
+      if (m_room_box->currentIndex() == 0)
+      {
+        // Display Room ID.
         const auto host_id = g_TraversalClient->GetHostID();
         m_hostcode_label->setText(
             QString::fromStdString(std::string(host_id.begin(), host_id.end())));
+      }
+      else
+      {
+        // Externally mapped IP and port are known when using the traversal server.
+        m_hostcode_label->setText(InetAddressToString(g_TraversalClient->GetExternalAddress()));
+      }
+
       m_hostcode_action_button->setEnabled(true);
       m_hostcode_action_button->setText(tr("Copy"));
       m_is_copy_button_retry = false;
@@ -649,10 +702,9 @@ void NetPlayDialog::UpdateGUI()
       break;
     }
   }
-  else if (server)
-  {
-    if (m_room_box->currentIndex() == (m_use_traversal ? 1 : 0))
+  else
   {
+    // Display External IP.
     if (!m_external_ip_address->empty())
     {
       const int port = Settings::Instance().GetNetPlayServer()->GetPort();
@@ -665,23 +717,10 @@ void NetPlayDialog::UpdateGUI()
       m_hostcode_label->setText(tr("Unknown"));
       m_hostcode_action_button->setEnabled(false);
     }
-    }
-    else
-    {
-      m_hostcode_label->setText(QString::fromStdString(
-          server->GetInterfaceHost(m_room_box->currentData().toString().toStdString())));
-      m_hostcode_action_button->setEnabled(true);
-    }
 
     m_hostcode_action_button->setText(tr("Copy"));
     m_is_copy_button_retry = false;
   }
-
-  if (m_old_player_count != m_player_count)
-  {
-    UpdateDiscordPresence();
-    m_old_player_count = m_player_count;
-  }
 }
 
 // NetPlayUI methods