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feat(network): Self-healing NAT state #3010

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8113c09
refactor(network): Remove obsolete Refresh NAT button and INI state
githubawn Jul 23, 2026
0a4ada6
fix(network): Reset probe state and close spare sockets on firewall r…
githubawn Jul 23, 2026
fd146ae
fix(network): Preserve FirewallHelper lifetime across online menus an…
githubawn Jul 23, 2026
6c50745
Updated after review feedback
githubawn Jul 25, 2026
67eef47
update after greptile feedback
githubawn Jul 25, 2026
802dd30
refactor(network): Put Refresh NAT button hiding behind ENABLE_GUI_HACKS
githubawn Jul 26, 2026
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1 change: 0 additions & 1 deletion Core/GameEngine/Include/Common/OptionPreferences.h
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,6 @@ class OptionPreferences : public UserPreferences
Int getFirewallBehavior();
Short getFirewallPortAllocationDelta();
UnsignedShort getFirewallPortOverride();
Bool getFirewallNeedToRefresh();
Bool usesSystemMapDir();
AsciiString getPreferred3DProvider();
AsciiString getSpeakerType();
Expand Down
4 changes: 1 addition & 3 deletions Core/GameEngine/Include/GameNetwork/FirewallHelper.h
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Expand Up @@ -175,6 +175,7 @@ class FirewallHelperClass {
FirewallHelperClass();
virtual ~FirewallHelperClass();
Bool detectFirewall();
void detectFirewallBehavior(/*Bool &canRecord*/);
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UnsignedShort getRawFirewallBehavior() {return((UnsignedShort)m_behavior);}
Short getSourcePortAllocationDelta();
Int getFirewallHardness(FirewallBehaviorType behavior);
Expand Down Expand Up @@ -239,12 +240,9 @@ class FirewallHelperClass {
return(FALSE);
};



private:

Int getNATPortAllocationScheme(Int numPorts, UnsignedShort *originalPorts, UnsignedShort *mangledPorts, Bool &relativeDelta, Bool &looksGood);
void detectFirewallBehavior(/*Bool &canRecord*/);
Bool getReferencePort();

SpareSocketStruct * findSpareSocketByPort(UnsignedShort port);
Expand Down
34 changes: 15 additions & 19 deletions Core/GameEngine/Source/Common/OptionPreferences.cpp
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Expand Up @@ -45,6 +45,7 @@
#include "GameLogic/ScriptEngine.h"

#include "GameNetwork/IPEnumeration.h"
#include "GameNetwork/FirewallHelper.h"

OptionPreferences::OptionPreferences()
{
Expand Down Expand Up @@ -142,14 +143,19 @@ UnsignedInt OptionPreferences::getLANIPAddress()

void OptionPreferences::setLANIPAddress(AsciiString IP)
{
(*this)["IPAddress"] = IP;
if ((*this)["IPAddress"].compareNoCase(IP) != 0)
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{
(*this)["IPAddress"] = IP;
if (TheFirewallHelper != nullptr)
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TheFirewallHelper->flagNeedToRefresh(TRUE);
}
}

void OptionPreferences::setLANIPAddress(UnsignedInt IP)
{
AsciiString tmp;
tmp.format("%d.%d.%d.%d", PRINTF_IP_AS_4_INTS(IP));
(*this)["IPAddress"] = tmp;
setLANIPAddress(tmp);
}

UnsignedInt OptionPreferences::getOnlineIPAddress()
Expand All @@ -170,14 +176,19 @@ UnsignedInt OptionPreferences::getOnlineIPAddress()

void OptionPreferences::setOnlineIPAddress(AsciiString IP)
{
(*this)["GameSpyIPAddress"] = IP;
if ((*this)["GameSpyIPAddress"].compareNoCase(IP) != 0)
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{
(*this)["GameSpyIPAddress"] = IP;
if (TheFirewallHelper != nullptr)
TheFirewallHelper->flagNeedToRefresh(TRUE);
}
}

void OptionPreferences::setOnlineIPAddress(UnsignedInt IP)
{
AsciiString tmp;
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tmp.format("%d.%d.%d.%d", PRINTF_IP_AS_4_INTS(IP));
(*this)["GameSpyIPAddress"] = tmp;
setOnlineIPAddress(tmp);
}

Bool OptionPreferences::getArchiveReplaysEnabled() const
Expand Down Expand Up @@ -501,21 +512,6 @@ UnsignedShort OptionPreferences::getFirewallPortOverride()
return portOverride;
}

Bool OptionPreferences::getFirewallNeedToRefresh()
{
OptionPreferences::const_iterator it = find("FirewallNeedToRefresh");
if (it == end()) {
return FALSE;
}

Bool retval = FALSE;
AsciiString str = it->second;
if (str.compareNoCase("TRUE") == 0) {
retval = TRUE;
}
return retval;
}

AsciiString OptionPreferences::getPreferred3DProvider()
{
OptionPreferences::const_iterator it = find("3DAudioProvider");
Expand Down
30 changes: 10 additions & 20 deletions Core/GameEngine/Source/GameNetwork/FirewallHelper.cpp
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Expand Up @@ -54,14 +54,17 @@
#include "GameNetwork/NAT.h"
#include "GameNetwork/udp.h"
#include "GameNetwork/NetworkDefs.h"
#include "GameNetwork/IPEnumeration.h"
#include "GameNetwork/GameSpy/GSConfig.h"


FirewallHelperClass *TheFirewallHelper = nullptr;

FirewallHelperClass * createFirewallHelper()
{
return NEW FirewallHelperClass();
FirewallHelperClass *helper = NEW FirewallHelperClass();
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helper->detectFirewallBehavior();
return helper;
}


Expand Down Expand Up @@ -176,22 +179,12 @@ void FirewallHelperClass::reset()
*=============================================================================================*/
Bool FirewallHelperClass::detectFirewall()
{
OptionPreferences pref;

OptionPreferences::const_iterator it = pref.find("FirewallNeedToRefresh");
if (it != pref.end()) {
AsciiString str = it->second;
if (str.compareNoCase("TRUE") == 0) {
TheWritableGlobalData->m_firewallBehavior = FIREWALL_TYPE_UNKNOWN;
}
}

if (TheWritableGlobalData->m_firewallBehavior == FIREWALL_TYPE_UNKNOWN) {
if (m_behavior == FIREWALL_TYPE_UNKNOWN) {
detectFirewallBehavior();

return FALSE;
} else {
DEBUG_LOG(("FirewallHelperClass::detectFirewall - firewall behavior already specified as %d, port allocation delta is %d, skipping detection.", TheWritableGlobalData->m_firewallBehavior, TheWritableGlobalData->m_firewallPortAllocationDelta));
DEBUG_LOG(("FirewallHelperClass::detectFirewall - firewall behavior already specified as %d, port allocation delta is %d, skipping detection.", m_behavior, m_sourcePortAllocationDelta));
}

return TRUE;
Expand Down Expand Up @@ -535,11 +528,9 @@ void FirewallHelperClass::writeFirewallBehavior()
*=============================================================================================*/
void FirewallHelperClass::flagNeedToRefresh(Bool flag)
{
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OptionPreferences pref;

(pref)["FirewallNeedToRefresh"] = flag ? "TRUE" : "FALSE";

pref.write();
if (flag) {

@xezon xezon Jul 26, 2026

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This flag argument looks very useless. Can be removed. "Munkee" text above needs updating then.

detectFirewallBehavior();
}
}
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Expand Down Expand Up @@ -583,13 +574,12 @@ void FirewallHelperClass::readFirewallBehavior()
*=============================================================================================*/
void FirewallHelperClass::detectFirewallBehavior(/*Bool &canRecord*/)
{
m_behavior = FIREWALL_TYPE_SIMPLE;
m_behavior = FIREWALL_TYPE_UNKNOWN;

m_currentState = DETECTIONSTATE_BEGIN;
}

FirewallHelperClass::FirewallBehaviorType FirewallHelperClass::getFirewallBehavior() {
m_currentState = DETECTIONSTATE_IDLE;
return m_behavior;
}

Expand Down
1 change: 0 additions & 1 deletion Generals/Code/GameEngine/Source/Common/GlobalData.cpp
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Expand Up @@ -1206,7 +1206,6 @@ void GlobalData::parseGameDataDefinition( INI* ini )
TheWritableGlobalData->m_moveScrollAnchor = optionPref.getMoveScrollAnchor();
TheWritableGlobalData->m_defaultIP = optionPref.getLANIPAddress();
TheWritableGlobalData->m_firewallSendDelay = optionPref.getSendDelay();
TheWritableGlobalData->m_firewallBehavior = optionPref.getFirewallBehavior();
TheWritableGlobalData->m_firewallPortAllocationDelta = optionPref.getFirewallPortAllocationDelta();
TheWritableGlobalData->m_firewallPortOverride = optionPref.getFirewallPortOverride();

Expand Down
19 changes: 3 additions & 16 deletions Generals/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/OptionsMenu.cpp
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Expand Up @@ -121,8 +121,6 @@ static GameWindow * checkDrawAnchor = nullptr;
static NameKeyType checkMoveAnchorID = NAMEKEY_INVALID;
static GameWindow * checkMoveAnchor = nullptr;

static NameKeyType buttonFirewallRefreshID = NAMEKEY_INVALID;
static GameWindow * buttonFirewallRefresh = nullptr;
//
//static NameKeyType checkAudioHardwareID = NAMEKEY_INVALID;
//static GameWindow * checkAudioHardware = nullptr;
Expand Down Expand Up @@ -970,8 +968,9 @@ void OptionsMenuInit( WindowLayout *layout, void *userData )
checkLanguageFilter = TheWindowManager->winGetWindowFromId( nullptr, checkLanguageFilterID );
checkSendDelayID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:CheckSendDelay" );
checkSendDelay = TheWindowManager->winGetWindowFromId( nullptr, checkSendDelayID);
buttonFirewallRefreshID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:ButtonFirewallRefresh" );
buttonFirewallRefresh = TheWindowManager->winGetWindowFromId( nullptr, buttonFirewallRefreshID);
GameWindow *buttonFirewallRefresh = TheWindowManager->winGetWindowFromId(nullptr, NAMEKEY("OptionsMenu.wnd:ButtonFirewallRefresh"));
if (buttonFirewallRefresh)
buttonFirewallRefresh->winHide(TRUE);
checkDrawAnchorID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:CheckBoxDrawAnchor" );
checkDrawAnchor = TheWindowManager->winGetWindowFromId( nullptr, checkDrawAnchorID);
checkMoveAnchorID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:CheckBoxMoveAnchor" );
Expand Down Expand Up @@ -1696,18 +1695,6 @@ WindowMsgHandledType OptionsMenuSystem( GameWindow *window, UnsignedInt msg,
(*pref)["UseCameraInReplays"] = "no";
}
}
else if (controlID == buttonFirewallRefreshID)
{
// setting the behavior to unknown will force the firewall helper to detect the firewall behavior
// the next time we log into gamespy/WOL/whatever.
char num[16];
num[0] = 0;
TheWritableGlobalData->m_firewallBehavior = FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;
itoa(TheGlobalData->m_firewallBehavior, num, 10);
AsciiString numstr;
numstr = num;
(*pref)["FirewallBehavior"] = numstr;
}
break;

}
Expand Down
6 changes: 4 additions & 2 deletions Generals/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/WOLGameSetupMenu.cpp
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Expand Up @@ -1212,7 +1212,8 @@ void WOLGameSetupMenuInit( WindowLayout *layout, void *userData )
CustomMatchPreferences customPref;
hostSlot->setColor( customPref.getPreferredColor() );
hostSlot->setPlayerTemplate( customPref.getPreferredFaction() );
hostSlot->setNATBehavior((FirewallHelperClass::FirewallBehaviorType)natPref.getFirewallBehavior());
FirewallHelperClass::FirewallBehaviorType natBehavior = TheFirewallHelper ? TheFirewallHelper->getFirewallBehavior() : FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;
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hostSlot->setNATBehavior(natBehavior);
hostSlot->setPingString(TheGameSpyInfo->getPingString());
game->setMap(customPref.getPreferredMap());

Expand Down Expand Up @@ -1260,7 +1261,8 @@ void WOLGameSetupMenuInit( WindowLayout *layout, void *userData )
options.format("Color=%d", customPref.getPreferredColor());
req.options = options.str();
TheGameSpyPeerMessageQueue->addRequest(req);
options.format("NAT=%d", natPref.getFirewallBehavior());
FirewallHelperClass::FirewallBehaviorType natBehavior = TheFirewallHelper ? TheFirewallHelper->getFirewallBehavior() : FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;
options.format("NAT=%d", natBehavior);
req.options = options.str();
TheGameSpyPeerMessageQueue->addRequest(req);
options.format("Ping=%s", TheGameSpyInfo->getPingString().str());
Expand Down
3 changes: 1 addition & 2 deletions Generals/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/WOLQuickMatchMenu.cpp
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Expand Up @@ -1691,8 +1691,7 @@ WindowMsgHandledType WOLQuickMatchMenuSystem( GameWindow *window, UnsignedInt ms
index = (Int)GadgetComboBoxGetItemData( comboBoxColor, selected );
req.QM.color = index;

OptionPreferences natPref;
req.QM.NAT = natPref.getFirewallBehavior();
req.QM.NAT = TheFirewallHelper ? TheFirewallHelper->getFirewallBehavior() : FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;

if (ladderIndex)
{
Expand Down
7 changes: 0 additions & 7 deletions Generals/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/WOLWelcomeMenu.cpp
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Expand Up @@ -489,11 +489,6 @@ void WOLWelcomeMenuInit( WindowLayout *layout, void *userData )
if (TheFirewallHelper == nullptr) {
TheFirewallHelper = createFirewallHelper();
}
if (TheFirewallHelper->detectFirewall() == TRUE) {
// don't need to detect firewall, already been done.
delete TheFirewallHelper;
TheFirewallHelper = nullptr;
}
/*

if (TheGameSpyChat && TheGameSpyChat->isConnected())
Expand Down Expand Up @@ -592,8 +587,6 @@ void WOLWelcomeMenuUpdate( WindowLayout * layout, void *userData)
{
if (TheFirewallHelper->behaviorDetectionUpdate())
{
TheWritableGlobalData->m_firewallBehavior = TheFirewallHelper->getFirewallBehavior();

TheFirewallHelper->writeFirewallBehavior();

TheFirewallHelper->flagNeedToRefresh(FALSE); // 2/19/03 BGC, we're done, so we don't need to refresh the NAT anymore.
Expand Down
10 changes: 0 additions & 10 deletions Generals/Code/GameEngine/Source/GameNetwork/GameSpy.cpp
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Expand Up @@ -284,16 +284,6 @@ void GameSpyChat::update()

if (TheFirewallHelper != nullptr) {
if (TheFirewallHelper->behaviorDetectionUpdate()) {
TheGlobalData->m_firewallBehavior = TheFirewallHelper->getFirewallBehavior();
OptionPreferences *pref = NEW OptionPreferences;
char num[16];
num[0] = 0;
itoa(TheGlobalData->m_firewallBehavior, num, 10);
AsciiString numstr;
numstr = num;
(*pref)["FirewallBehavior"] = numstr;
pref->write();

// we are now done with the firewall helper
delete TheFirewallHelper;
TheFirewallHelper = nullptr;
Expand Down
1 change: 0 additions & 1 deletion GeneralsMD/Code/GameEngine/Source/Common/GlobalData.cpp
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Expand Up @@ -1213,7 +1213,6 @@ void GlobalData::parseGameDataDefinition( INI* ini )
TheWritableGlobalData->m_moveScrollAnchor = optionPref.getMoveScrollAnchor();
TheWritableGlobalData->m_defaultIP = optionPref.getLANIPAddress();
TheWritableGlobalData->m_firewallSendDelay = optionPref.getSendDelay();
TheWritableGlobalData->m_firewallBehavior = optionPref.getFirewallBehavior();
TheWritableGlobalData->m_firewallPortAllocationDelta = optionPref.getFirewallPortAllocationDelta();
TheWritableGlobalData->m_firewallPortOverride = optionPref.getFirewallPortOverride();

Expand Down
19 changes: 3 additions & 16 deletions GeneralsMD/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/OptionsMenu.cpp
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Expand Up @@ -127,8 +127,6 @@ static GameWindow * checkDrawAnchor = nullptr;
static NameKeyType checkMoveAnchorID = NAMEKEY_INVALID;
static GameWindow * checkMoveAnchor = nullptr;

static NameKeyType buttonFirewallRefreshID = NAMEKEY_INVALID;
static GameWindow * buttonFirewallRefresh = nullptr;
//
//static NameKeyType checkAudioHardwareID = NAMEKEY_INVALID;
//static GameWindow * checkAudioHardware = nullptr;
Expand Down Expand Up @@ -999,8 +997,9 @@ void OptionsMenuInit( WindowLayout *layout, void *userData )
checkLanguageFilter = TheWindowManager->winGetWindowFromId( nullptr, checkLanguageFilterID );
checkSendDelayID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:CheckSendDelay" );
checkSendDelay = TheWindowManager->winGetWindowFromId( nullptr, checkSendDelayID);
buttonFirewallRefreshID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:ButtonFirewallRefresh" );
buttonFirewallRefresh = TheWindowManager->winGetWindowFromId( nullptr, buttonFirewallRefreshID);
GameWindow *buttonFirewallRefresh = TheWindowManager->winGetWindowFromId(nullptr, NAMEKEY("OptionsMenu.wnd:ButtonFirewallRefresh"));
if (buttonFirewallRefresh)
buttonFirewallRefresh->winHide(TRUE);
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checkDrawAnchorID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:CheckBoxDrawAnchor" );
checkDrawAnchor = TheWindowManager->winGetWindowFromId( nullptr, checkDrawAnchorID);
checkMoveAnchorID = TheNameKeyGenerator->nameToKey( "OptionsMenu.wnd:CheckBoxMoveAnchor" );
Expand Down Expand Up @@ -1732,18 +1731,6 @@ WindowMsgHandledType OptionsMenuSystem( GameWindow *window, UnsignedInt msg,
(*pref)["UseCameraInReplays"] = "no";
}
}
else if (controlID == buttonFirewallRefreshID)
{
// setting the behavior to unknown will force the firewall helper to detect the firewall behavior
// the next time we log into gamespy/WOL/whatever.
char num[16];
num[0] = 0;
TheWritableGlobalData->m_firewallBehavior = FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;
itoa(TheGlobalData->m_firewallBehavior, num, 10);
AsciiString numstr;
numstr = num;
(*pref)["FirewallBehavior"] = numstr;
}
break;

}
Expand Down
6 changes: 4 additions & 2 deletions GeneralsMD/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/WOLGameSetupMenu.cpp
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Expand Up @@ -1369,7 +1369,8 @@ void WOLGameSetupMenuInit( WindowLayout *layout, void *userData )
CustomMatchPreferences customPref;
hostSlot->setColor( customPref.getPreferredColor() );
hostSlot->setPlayerTemplate( customPref.getPreferredFaction() );
hostSlot->setNATBehavior((FirewallHelperClass::FirewallBehaviorType)natPref.getFirewallBehavior());
FirewallHelperClass::FirewallBehaviorType natBehavior = TheFirewallHelper ? TheFirewallHelper->getFirewallBehavior() : FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;
hostSlot->setNATBehavior(natBehavior);
hostSlot->setPingString(TheGameSpyInfo->getPingString());
game->setMap(customPref.getPreferredMap());

Expand Down Expand Up @@ -1437,7 +1438,8 @@ void WOLGameSetupMenuInit( WindowLayout *layout, void *userData )
options.format("Color=%d", customPref.getPreferredColor());
req.options = options.str();
TheGameSpyPeerMessageQueue->addRequest(req);
options.format("NAT=%d", natPref.getFirewallBehavior());
FirewallHelperClass::FirewallBehaviorType natBehavior = TheFirewallHelper ? TheFirewallHelper->getFirewallBehavior() : FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;
options.format("NAT=%d", natBehavior);
req.options = options.str();
TheGameSpyPeerMessageQueue->addRequest(req);
options.format("Ping=%s", TheGameSpyInfo->getPingString().str());
Expand Down
3 changes: 1 addition & 2 deletions GeneralsMD/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/WOLQuickMatchMenu.cpp
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Expand Up @@ -1756,8 +1756,7 @@ WindowMsgHandledType WOLQuickMatchMenuSystem( GameWindow *window, UnsignedInt ms
index = (Int)GadgetComboBoxGetItemData( comboBoxColor, selected );
req.QM.color = index;

OptionPreferences natPref;
req.QM.NAT = natPref.getFirewallBehavior();
req.QM.NAT = TheFirewallHelper ? TheFirewallHelper->getFirewallBehavior() : FirewallHelperClass::FIREWALL_TYPE_UNKNOWN;

if (ladderIndex)
{
Expand Down
7 changes: 0 additions & 7 deletions GeneralsMD/Code/GameEngine/Source/GameClient/GUI/GUICallbacks/Menus/WOLWelcomeMenu.cpp
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Expand Up @@ -506,11 +506,6 @@ void WOLWelcomeMenuInit( WindowLayout *layout, void *userData )
if (TheFirewallHelper == nullptr) {
TheFirewallHelper = createFirewallHelper();
}
if (TheFirewallHelper->detectFirewall() == TRUE) {
// don't need to detect firewall, already been done.
delete TheFirewallHelper;
TheFirewallHelper = nullptr;
}
/*

if (TheGameSpyChat && TheGameSpyChat->isConnected())
Expand Down Expand Up @@ -609,8 +604,6 @@ void WOLWelcomeMenuUpdate( WindowLayout * layout, void *userData)
{
if (TheFirewallHelper->behaviorDetectionUpdate())
{
TheWritableGlobalData->m_firewallBehavior = TheFirewallHelper->getFirewallBehavior();

TheFirewallHelper->writeFirewallBehavior();

TheFirewallHelper->flagNeedToRefresh(FALSE); // 2/19/03 BGC, we're done, so we don't need to refresh the NAT anymore.
Expand Down
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