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Update HostStateRequest hook #28

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Merged
xen-000 merged 1 commit into from
Apr 19, 2025
Merged

Update HostStateRequest hook #28

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48 changes: 26 additions & 22 deletions src/multiaddonmanager.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
#include "utils/plat.h"
#include "networksystem/inetworkserializer.h"
#include "networksystem/inetworkmessages.h"
#include "hoststate.h"
#include "igameeventsystem.h"
#include "serversideclient.h"
#include "funchook.h"
Expand Down Expand Up @@ -95,16 +96,16 @@ std::string VectorToString(CUtlVector<std::string> &vector)
}

typedef bool (FASTCALL *SendNetMessage_t)(CServerSideClient *, CNetMessage*, NetChannelBufType_t);
typedef void *(FASTCALL *HostStateRequest_t)(void*, void**);
typedef void (FASTCALL *HostStateRequest_t)(int, CHostStateRequest*);

bool FASTCALL Hook_SendNetMessage(CServerSideClient *pClient, CNetMessage *pData, NetChannelBufType_t bufType);
void *FASTCALL Hook_HostStateRequest(void *a1, void **pRequest);
void FASTCALL Hook_SetPendingHostStateRequest(int, CHostStateRequest*);

SendNetMessage_t g_pfnSendNetMessage = nullptr;
HostStateRequest_t g_pfnHostStateRequest = nullptr;
HostStateRequest_t g_pfnSetPendingHostStateRequest = nullptr;

funchook_t *g_pSendNetMessageHook = nullptr;
funchook_t *g_pHostStateRequestHook = nullptr;
funchook_t *g_pSetPendingHostStateRequest = nullptr;

class GameSessionConfiguration_t { };

Expand Down Expand Up @@ -173,9 +174,9 @@ bool MultiAddonManager::Load(PluginId id, ISmmAPI *ismm, char *error, size_t max

int sig_error;

g_pfnHostStateRequest = (HostStateRequest_t)engineModule.FindSignature(HostStateRequest_Sig, sizeof(HostStateRequest_Sig) - 1, sig_error);
g_pfnSetPendingHostStateRequest = (HostStateRequest_t)engineModule.FindSignature(HostStateRequest_Sig, sizeof(HostStateRequest_Sig) - 1, sig_error);

if (!g_pfnHostStateRequest)
if (!g_pfnSetPendingHostStateRequest)
{
V_snprintf(error, maxlen, "Could not find the signature for HostStateRequest\n");
Panic("%s", error);
Expand All @@ -186,9 +187,9 @@ bool MultiAddonManager::Load(PluginId id, ISmmAPI *ismm, char *error, size_t max
Panic("Signature for HostStateRequest occurs multiple times! Using first match but this might end up crashing!\n");
}

g_pHostStateRequestHook = funchook_create();
funchook_prepare(g_pHostStateRequestHook, (void**)&g_pfnHostStateRequest, (void*)Hook_HostStateRequest);
funchook_install(g_pHostStateRequestHook, 0);
g_pSetPendingHostStateRequest = funchook_create();
funchook_prepare(g_pSetPendingHostStateRequest, (void**)&g_pfnSetPendingHostStateRequest, (void*)Hook_SetPendingHostStateRequest);
funchook_install(g_pSetPendingHostStateRequest, 0);

// We're using funchook even though it's a virtual function because it can be called on a different thread and SourceHook isn't thread-safe
void **pServerSideClientVTable = (void **)engineModule.FindVirtualTable("CServerSideClient");
Expand Down Expand Up @@ -239,12 +240,18 @@ bool MultiAddonManager::Unload(char *error, size_t maxlen)
SH_REMOVE_HOOK(IGameEventSystem, PostEventAbstract, g_pGameEventSystem, SH_MEMBER(this, &MultiAddonManager::Hook_PostEvent), false);
SH_REMOVE_HOOK_ID(g_iLoadEventsFromFileId);

if (g_pHostStateRequestHook)
if (g_pSetPendingHostStateRequest)
{
funchook_uninstall(g_pHostStateRequestHook, 0);
funchook_destroy(g_pHostStateRequestHook);
funchook_uninstall(g_pSetPendingHostStateRequest, 0);
funchook_destroy(g_pSetPendingHostStateRequest);
}

if (g_pSendNetMessageHook)
{
funchook_uninstall(g_pSendNetMessageHook, 0);
funchook_destroy(g_pSendNetMessageHook);
}

return true;
}

Expand Down Expand Up @@ -711,37 +718,34 @@ bool FASTCALL Hook_SendNetMessage(CServerSideClient *pClient, CNetMessage *pData
return g_pfnSendNetMessage(pClient, pData, bufType);
}

void* FASTCALL Hook_HostStateRequest(void *a1, void **pRequest)
void FASTCALL Hook_SetPendingHostStateRequest(int numRequest, CHostStateRequest *pRequest)
{
if (g_MultiAddonManager.m_ExtraAddons.Count() == 0)
return g_pfnHostStateRequest(a1, pRequest);

// This offset hasn't changed in 6 years so it should be safe
CUtlString *psAddonString = (CUtlString *)(pRequest + 11);
g_pfnSetPendingHostStateRequest(numRequest, pRequest);

CUtlVector<std::string> vecAddons;
StringToVector(psAddonString->Get(), vecAddons);
StringToVector(pRequest->m_Addons.Get(), vecAddons);

// Clear the string just in case it wasn't somehow, like when reloading the map
psAddonString->Clear();
pRequest->m_Addons.Clear();

std::string sExtraAddonString = VectorToString(g_MultiAddonManager.m_ExtraAddons);

// If it's empty or the first addon in the string is ours, it means we're on a default map
if (vecAddons.Count() == 0 || g_MultiAddonManager.m_ExtraAddons.HasElement(vecAddons[0]))
{
Message("%s: setting addon string to \"%s\"\n", __func__, sExtraAddonString.c_str());
psAddonString->Set(sExtraAddonString.c_str());
pRequest->m_Addons = sExtraAddonString.c_str();
g_MultiAddonManager.ClearCurrentWorkshopMap();
}
else
{
Message("%s: appending \"%s\" to addon string \"%s\"\n", __func__, sExtraAddonString.c_str(), vecAddons[0].c_str());
psAddonString->Format("%s,%s", vecAddons[0].c_str(), sExtraAddonString.c_str());
pRequest->m_Addons.Format("%s,%s", vecAddons[0].c_str(), sExtraAddonString.c_str());
g_MultiAddonManager.SetCurrentWorkshopMap(vecAddons[0].c_str());
}

return g_pfnHostStateRequest(a1, pRequest);
g_pfnSetPendingHostStateRequest(numRequest, pRequest);
}

float g_flRejoinTimeout = 10.f;
Expand Down