1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/core/ConsoleDetours.cpp Sat Sep 26 17:14:50 2009 -0400
1.3 @@ -0,0 +1,702 @@
1.4 +/**
1.5 + * vim: set ts=4 sw=4 tw=99 noet :
1.6 + * =============================================================================
1.7 + * SourceMod
1.8 + * Copyright (C) 2004-2009 AlliedModders LLC. All rights reserved.
1.9 + * =============================================================================
1.10 + *
1.11 + * This program is free software; you can redistribute it and/or modify it under
1.12 + * the terms of the GNU General Public License, version 3.0, as published by the
1.13 + * Free Software Foundation.
1.14 + *
1.15 + * This program is distributed in the hope that it will be useful, but WITHOUT
1.16 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.17 + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
1.18 + * details.
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License along with
1.21 + * this program. If not, see <http://www.gnu.org/licenses/>.
1.22 + *
1.23 + * As a special exception, AlliedModders LLC gives you permission to link the
1.24 + * code of this program (as well as its derivative works) to "Half-Life 2," the
1.25 + * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
1.26 + * by the Valve Corporation. You must obey the GNU General Public License in
1.27 + * all respects for all other code used. Additionally, AlliedModders LLC grants
1.28 + * this exception to all derivative works. AlliedModders LLC defines further
1.29 + * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
1.30 + * or <http://www.sourcemod.net/license.php>.
1.31 + *
1.32 + * Version: $Id$
1.33 + */
1.34 +
1.35 +/**
1.36 + * On SourceHook v4.3 or lower, there are no DVP hooks. Very sad, right?
1.37 + * Only do this on newer version. For the older code, we'll do an incredibly
1.38 + * hacky detour.
1.39 + *
1.40 + * The idea of the "non-hacky" (yeah... no) code is that every unique
1.41 + * ConCommand vtable gets its own DVP hook. We watch for unloading and
1.42 + * loading commands to remove stale hooks from SH.
1.43 + */
1.44 +
1.45 +#include "sourcemod.h"
1.46 +#include "sourcemm_api.h"
1.47 +#include "Logger.h"
1.48 +#include "compat_wrappers.h"
1.49 +#include "ConsoleDetours.h"
1.50 +#include "GameConfigs.h"
1.51 +#include "sm_stringutil.h"
1.52 +#include "ConCmdManager.h"
1.53 +#include "HalfLife2.h"
1.54 +#include "ConCommandBaseIterator.h"
1.55 +
1.56 +#if defined PLATFORM_LINUX
1.57 +# include <dlfcn.h>
1.58 +# include <sys/mman.h>
1.59 +# include <stdint.h>
1.60 +# include <unistd.h>
1.61 +#endif
1.62 +
1.63 +#if SH_IMPL_VERSION >= 5
1.64 +# if SOURCE_ENGINE >= SE_ORANGEBOX
1.65 + SH_DECL_EXTERN1_void(ConCommand, Dispatch, SH_NOATTRIB, false, const CCommand &);
1.66 +# else
1.67 + SH_DECL_EXTERN0_void(ConCommand, Dispatch, SH_NOATTRIB, false);
1.68 +# endif
1.69 +#elif SH_IMPL_VERSION == 3
1.70 +extern bool __SourceHook_FHAddConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);
1.71 +extern bool __SourceHook_FHRemoveConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);
1.72 +#endif
1.73 +
1.74 +#if SH_IMPL_VERSION >= 4
1.75 +
1.76 +class GenericCommandHooker : public IConCommandLinkListener
1.77 +{
1.78 + struct HackInfo
1.79 + {
1.80 + void **vtable;
1.81 + int hook;
1.82 + unsigned int refcount;
1.83 + };
1.84 + CVector<HackInfo> vtables;
1.85 + bool enabled;
1.86 + SourceHook::MemFuncInfo dispatch;
1.87 +
1.88 + inline void **GetVirtualTable(ConCommandBase *pBase)
1.89 + {
1.90 + return *reinterpret_cast<void***>(reinterpret_cast<char*>(pBase) +
1.91 + dispatch.thisptroffs +
1.92 + dispatch.vtbloffs);
1.93 + }
1.94 +
1.95 + inline bool FindVtable(void **ptr, size_t& index)
1.96 + {
1.97 + for (size_t i = 0; i < vtables.size(); i++)
1.98 + {
1.99 + if (vtables[i].vtable == ptr)
1.100 + {
1.101 + index = i;
1.102 + return true;
1.103 + }
1.104 + }
1.105 + return false;
1.106 + }
1.107 +
1.108 + void MakeHookable(ConCommandBase *pBase)
1.109 + {
1.110 + if (!pBase->IsCommand())
1.111 + return;
1.112 +
1.113 + ConCommand *cmd = (ConCommand*)pBase;
1.114 + void **vtable = GetVirtualTable(cmd);
1.115 +
1.116 + size_t index;
1.117 + if (!FindVtable(vtable, index))
1.118 + {
1.119 + HackInfo hack;
1.120 + hack.vtable = vtable;
1.121 + hack.hook = SH_ADD_VPHOOK(ConCommand, Dispatch, cmd, SH_MEMBER(this, &GenericCommandHooker::Dispatch), false);
1.122 + hack.refcount = 1;
1.123 + vtables.push_back(hack);
1.124 + }
1.125 + else
1.126 + {
1.127 + vtables[index].refcount++;
1.128 + }
1.129 + }
1.130 +
1.131 +# if SOURCE_ENGINE >= SE_ORANGEBOX
1.132 + void Dispatch(const CCommand& args)
1.133 +# else
1.134 + void Dispatch()
1.135 +# endif
1.136 + {
1.137 + cell_t res = ConsoleDetours::Dispatch(META_IFACEPTR(ConCommand)
1.138 +# if SOURCE_ENGINE >= SE_ORANGEBOX
1.139 + , args
1.140 +# endif
1.141 + );
1.142 + if (res >= Pl_Handled)
1.143 + RETURN_META(MRES_SUPERCEDE);
1.144 + }
1.145 +
1.146 + void ReparseCommandList()
1.147 + {
1.148 + for (size_t i = 0; i < vtables.size(); i++)
1.149 + vtables[i].refcount = 0;
1.150 + for (ConCommandBaseIterator iter; iter.IsValid(); iter.Next())
1.151 + MakeHookable(iter.Get());
1.152 + CVector<HackInfo>::iterator iter = vtables.begin();
1.153 + while (iter != vtables.end())
1.154 + {
1.155 + if ((*iter).refcount)
1.156 + continue;
1.157 + /* Damn it. This event happens AFTER the plugin has unloaded!
1.158 + * There's two options. Remove the hook now and hope SH's memory
1.159 + * protection will prevent a crash. Otherwise, we can wait until
1.160 + * the server shuts down and more likely crash then.
1.161 + *
1.162 + * This situation only arises if:
1.163 + * 1) Someone has used AddCommandFilter()
1.164 + * 2) ... on a Dark Messiah server (mm:s new api)
1.165 + * 3) ... and another MM:S plugin that uses ConCommands has unloaded.
1.166 + *
1.167 + * Even though the impact is really small, we'll wait until the
1.168 + * server shuts down, so normal operation isn't interrupted.
1.169 + *
1.170 + * See bug 4018.
1.171 + */
1.172 + iter = vtables.erase(iter);
1.173 + }
1.174 + }
1.175 +
1.176 + void UnhookCommand(ConCommandBase *pBase)
1.177 + {
1.178 + if (!pBase->IsCommand())
1.179 + return;
1.180 +
1.181 + ConCommand *cmd = (ConCommand*)pBase;
1.182 + void **vtable = GetVirtualTable(cmd);
1.183 +
1.184 + size_t index;
1.185 + if (!FindVtable(vtable, index))
1.186 + {
1.187 + g_Logger.LogError("Console detour tried to unhook command \"%s\" but it wasn't found", pBase->GetName());
1.188 + return;
1.189 + }
1.190 +
1.191 + assert(vtables[index].refcount > 0);
1.192 + vtables[index].refcount--;
1.193 + if (vtables[index].refcount == 0)
1.194 + {
1.195 + SH_REMOVE_HOOK_ID(vtables[index].hook);
1.196 + vtables.erase(vtables.iterAt(index));
1.197 + }
1.198 + }
1.199 +
1.200 +public:
1.201 + GenericCommandHooker() : enabled(false)
1.202 + {
1.203 + }
1.204 +
1.205 + bool Enable()
1.206 + {
1.207 + SourceHook::GetFuncInfo(&ConCommand::Dispatch, dispatch);
1.208 +
1.209 + if (dispatch.thisptroffs < 0)
1.210 + {
1.211 + g_Logger.LogError("Command filter could not determine ConCommand layout");
1.212 + return false;
1.213 + }
1.214 +
1.215 + for (ConCommandBaseIterator iter; iter.IsValid(); iter.Next())
1.216 + MakeHookable(iter.Get());
1.217 +
1.218 + if (!vtables.size())
1.219 + {
1.220 + g_Logger.LogError("Command filter could not find any cvars!");
1.221 + return false;
1.222 + }
1.223 +
1.224 + enabled = true;
1.225 +
1.226 + return true;
1.227 + }
1.228 +
1.229 + void Disable()
1.230 + {
1.231 + for (size_t i = 0; i < vtables.size(); i++)
1.232 + SH_REMOVE_HOOK_ID(vtables[i].hook);
1.233 + vtables.clear();
1.234 + }
1.235 +
1.236 + virtual void OnLinkConCommand(ConCommandBase *pBase)
1.237 + {
1.238 + if (!enabled)
1.239 + return;
1.240 + MakeHookable(pBase);
1.241 + }
1.242 +
1.243 + virtual void OnUnlinkConCommand(ConCommandBase *pBase)
1.244 + {
1.245 + if (!enabled)
1.246 + return;
1.247 + if (pBase == NULL)
1.248 + ReparseCommandList();
1.249 + else
1.250 + UnhookCommand(pBase);
1.251 + }
1.252 +};
1.253 +
1.254 +/**
1.255 + * END DVP HOOK VERSION
1.256 + */
1.257 +
1.258 +#else /* SH_IMPL_VERSION >= 4 */
1.259 +
1.260 +/**
1.261 + * BEGIN ENGINE DETOUR VERSION
1.262 + */
1.263 +
1.264 +# include <jit/jit_helpers.h>
1.265 +# include <jit/x86/x86_macros.h>
1.266 +
1.267 +class GenericCommandHooker
1.268 +{
1.269 + struct Patch
1.270 + {
1.271 + Patch() : applied(false)
1.272 + {
1.273 + }
1.274 +
1.275 + bool applied;
1.276 + void *base;
1.277 + unsigned char search[16];
1.278 + size_t search_len;
1.279 + size_t offset;
1.280 + size_t saveat;
1.281 + int regparam;
1.282 + void *detour;
1.283 + };
1.284 +
1.285 + Patch ces;
1.286 + Patch cgc;
1.287 +
1.288 +public:
1.289 + bool Enable()
1.290 + {
1.291 + const char *platform = NULL;
1.292 +# if defined(PLATFORM_WINDOWS)
1.293 + platform = "Windows";
1.294 +# else
1.295 + void *addrInBase = (void *)g_SMAPI->GetEngineFactory(false);
1.296 + Dl_info info;
1.297 + if (!dladdr(addrInBase, &info))
1.298 + {
1.299 + g_Logger.LogError("Command filter could not find engine name");
1.300 + return false;
1.301 + }
1.302 + if (strstr(info.dli_fname, "engine_i486"))
1.303 + {
1.304 + platform = "Linux_486";
1.305 + }
1.306 + else if (strstr(info.dli_fname, "engine_i686"))
1.307 + {
1.308 + platform = "Linux_686";
1.309 + }
1.310 + else if (strstr(info.dli_fname, "engine_amd"))
1.311 + {
1.312 + platform = "Linux_AMD";
1.313 + }
1.314 + else
1.315 + {
1.316 + g_Logger.LogError("Command filter could not determine engine (%s)", info.dli_fname);
1.317 + return false;
1.318 + }
1.319 +# endif
1.320 +
1.321 + if (!PrepPatch("Cmd_ExecuteString", "CES", platform, &ces))
1.322 + return false;
1.323 + if (!PrepPatch("CGameClient::ExecuteString", "CGC", platform, &cgc))
1.324 + return false;
1.325 +
1.326 + ApplyPatch(&ces);
1.327 + ApplyPatch(&cgc);
1.328 +
1.329 + return true;
1.330 + }
1.331 +
1.332 + void Disable()
1.333 + {
1.334 + UndoPatch(&ces);
1.335 + UndoPatch(&cgc);
1.336 + }
1.337 +
1.338 +private:
1.339 +
1.340 +# if !defined PLATFORM_WINDOWS
1.341 +# define PAGE_READWRITE PROT_READ|PROT_WRITE
1.342 +# define PAGE_EXECUTE_READ PROT_READ|PROT_EXEC
1.343 +
1.344 + static inline uintptr_t AddrToPage(uintptr_t address)
1.345 + {
1.346 + return (address & ~(uintptr_t(sysconf(_SC_PAGE_SIZE) - 1)));
1.347 + }
1.348 +
1.349 +# endif
1.350 +
1.351 + void Protect(void *addr, size_t length, int prot)
1.352 + {
1.353 +# if defined PLATFORM_WINDOWS
1.354 + DWORD ignore;
1.355 + VirtualProtect(addr, length, prot, &ignore);
1.356 +# else
1.357 + uintptr_t startPage = AddrToPage(uintptr_t(addr));
1.358 + length += (uintptr_t(addr) - startPage);
1.359 + mprotect((void*)startPage, length, prot);
1.360 +# endif
1.361 + }
1.362 +
1.363 + void UndoPatch(Patch *patch)
1.364 + {
1.365 + if (!patch->applied || patch->detour == NULL)
1.366 + return;
1.367 +
1.368 + g_pSourcePawn->FreePageMemory(patch->detour);
1.369 +
1.370 + unsigned char *source = (unsigned char *)patch->base + patch->offset;
1.371 + Protect(source, patch->search_len, PAGE_READWRITE);
1.372 + for (size_t i = 0; i < patch->search_len; i++)
1.373 + source[i] = patch->search[i];
1.374 + Protect(source, patch->search_len, PAGE_EXECUTE_READ);
1.375 + }
1.376 +
1.377 + void ApplyPatch(Patch *patch)
1.378 + {
1.379 + assert(!patch->applied);
1.380 +
1.381 + size_t length = 0;
1.382 + void *callback = (void*)&ConsoleDetours::Dispatch;
1.383 +
1.384 + /* Bogus assignment to make compiler is doing the right thing. */
1.385 + patch->detour = callback;
1.386 +
1.387 + /* Assemgle the detour. */
1.388 + JitWriter writer;
1.389 + writer.outbase = NULL;
1.390 + writer.outptr = NULL;
1.391 + do
1.392 + {
1.393 + /* Need a specific register, or value on stack? */
1.394 + if (patch->regparam != -1)
1.395 + IA32_Push_Reg(&writer, patch->regparam);
1.396 + /* Call real function. */
1.397 + IA32_Write_Jump32_Abs(&writer, IA32_Call_Imm32(&writer, 0), callback);
1.398 + /* Restore stack. */
1.399 + if (patch->regparam != -1)
1.400 + IA32_Pop_Reg(&writer, patch->regparam);
1.401 + /* Copy any saved bytes */
1.402 + if (patch->saveat)
1.403 + {
1.404 + for (size_t i = patch->saveat; i < patch->search_len; i++)
1.405 + {
1.406 + writer.write_ubyte(patch->search[i]);
1.407 + }
1.408 + }
1.409 + /* Jump back to the caller. */
1.410 + unsigned char *target = (unsigned char *)patch->base + patch->offset + patch->search_len;
1.411 + IA32_Jump_Imm32_Abs(&writer, target);
1.412 + /* Assemble, if we can. */
1.413 + if (writer.outbase == NULL)
1.414 + {
1.415 + length = writer.outptr - writer.outbase;
1.416 + patch->detour = g_pSourcePawn->AllocatePageMemory(length);
1.417 + if (patch->detour == NULL)
1.418 + {
1.419 + g_Logger.LogError("Ran out of memory!");
1.420 + return;
1.421 + }
1.422 + g_pSourcePawn->SetReadWrite(patch->detour);
1.423 + writer.outbase = (jitcode_t)patch->detour;
1.424 + writer.outptr = writer.outbase;
1.425 + }
1.426 + else
1.427 + {
1.428 + break;
1.429 + }
1.430 + } while (true);
1.431 +
1.432 + g_pSourcePawn->SetReadExecute(patch->detour);
1.433 +
1.434 + unsigned char *source = (unsigned char *)patch->base + patch->offset;
1.435 + Protect(source, 6, PAGE_READWRITE);
1.436 + source[0] = 0xFF;
1.437 + source[1] = 0x25;
1.438 + *(void **)&source[2] = &patch->detour;
1.439 + Protect(source, 6, PAGE_EXECUTE_READ);
1.440 +
1.441 + patch->applied = true;
1.442 + }
1.443 +
1.444 + bool PrepPatch(const char *signature, const char *name, const char *platform, Patch *patch)
1.445 + {
1.446 + /* Get the base address of the function. */
1.447 + if (!g_pGameConf->GetMemSig(signature, &patch->base) || patch->base == NULL)
1.448 + {
1.449 + g_Logger.LogError("Command filter could not find signature: %s", signature);
1.450 + return false;
1.451 + }
1.452 +
1.453 + const char *value;
1.454 + char keyname[255];
1.455 +
1.456 + /* Get the verification bytes that will be written over. */
1.457 + UTIL_Format(keyname, sizeof(keyname), "%s_Patch_%s", name, platform);
1.458 + if ((value = g_pGameConf->GetKeyValue(keyname)) == NULL)
1.459 + {
1.460 + g_Logger.LogError("Command filter could not find key: %s", keyname);
1.461 + return false;
1.462 + }
1.463 + patch->search_len = UTIL_DecodeHexString(patch->search, sizeof(patch->search), value);
1.464 + if (patch->search_len < 6)
1.465 + {
1.466 + g_Logger.LogError("Error decoding %s value, or not long enough", keyname);
1.467 + return false;
1.468 + }
1.469 +
1.470 + /* Get the offset into the function. */
1.471 + UTIL_Format(keyname, sizeof(keyname), "%s_Offset_%s", name, platform);
1.472 + if ((value = g_pGameConf->GetKeyValue(keyname)) == NULL)
1.473 + {
1.474 + g_Logger.LogError("Command filter could not find key: %s", keyname);
1.475 + return false;
1.476 + }
1.477 + patch->offset = atoi(value);
1.478 + if (patch->offset > 20000)
1.479 + {
1.480 + g_Logger.LogError("Command filter %s value is bogus", keyname);
1.481 + return false;
1.482 + }
1.483 +
1.484 + /* Get the number of bytes to save from what was written over. */
1.485 + patch->saveat = 0;
1.486 + UTIL_Format(keyname, sizeof(keyname), "%s_Save_%s", name, platform);
1.487 + if ((value = g_pGameConf->GetKeyValue(keyname)) != NULL)
1.488 + {
1.489 + patch->saveat = atoi(value);
1.490 + if (patch->saveat >= patch->search_len)
1.491 + {
1.492 + g_Logger.LogError("Command filter %s value is too large", keyname);
1.493 + return false;
1.494 + }
1.495 + }
1.496 +
1.497 + /* Get register for parameter, if any. */
1.498 + patch->regparam = -1;
1.499 + UTIL_Format(keyname, sizeof(keyname), "%s_Reg_%s", name, platform);
1.500 + if ((value = g_pGameConf->GetKeyValue(keyname)) != NULL)
1.501 + {
1.502 + patch->regparam = atoi(value);
1.503 + }
1.504 +
1.505 + /* Everything loaded from gamedata, make sure the patch will succeed. */
1.506 + unsigned char *address = (unsigned char *)patch->base + patch->offset;
1.507 + for (size_t i = 0; i < patch->search_len; i++)
1.508 + {
1.509 + if (address[i] != patch->search[i])
1.510 + {
1.511 + g_Logger.LogError("Command filter %s has changed (byte %x is not %x sub-offset %d)",
1.512 + name, address[i], patch->search[i], i);
1.513 + return false;
1.514 + }
1.515 + }
1.516 +
1.517 + return true;
1.518 + }
1.519 +};
1.520 +
1.521 +static bool dummy_hook_set = false;
1.522 +void DummyHook()
1.523 +{
1.524 + if (dummy_hook_set)
1.525 + {
1.526 + dummy_hook_set = false;
1.527 + RETURN_META(MRES_SUPERCEDE);
1.528 + }
1.529 +}
1.530 +
1.531 +#endif
1.532 +
1.533 +/**
1.534 + * BEGIN THE ACTUALLY GENERIC CODE.
1.535 + */
1.536 +
1.537 +static GenericCommandHooker s_GenericHooker;
1.538 +ConsoleDetours g_ConsoleDetours;
1.539 +
1.540 +ConsoleDetours::ConsoleDetours() : triedToEnable(false), isEnabled(false)
1.541 +{
1.542 +}
1.543 +
1.544 +void ConsoleDetours::OnSourceModAllInitialized()
1.545 +{
1.546 + m_pForward = g_Forwards.CreateForwardEx("OnAnyCommand", ET_Hook, 3, NULL, Param_Cell,
1.547 + Param_String, Param_Cell);
1.548 +}
1.549 +
1.550 +void ConsoleDetours::OnSourceModShutdown()
1.551 +{
1.552 + List<Listener*>::iterator iter = m_Listeners.begin();
1.553 + while (iter != m_Listeners.end())
1.554 + {
1.555 + Listener *listener = (*iter);
1.556 + g_Forwards.ReleaseForward(listener->forward);
1.557 + delete listener;
1.558 + iter = m_Listeners.erase(iter);
1.559 + }
1.560 +
1.561 + g_Forwards.ReleaseForward(m_pForward);
1.562 + s_GenericHooker.Disable();
1.563 +}
1.564 +
1.565 +bool ConsoleDetours::IsAvailable()
1.566 +{
1.567 + if (triedToEnable)
1.568 + return isEnabled;
1.569 + isEnabled = s_GenericHooker.Enable();
1.570 + triedToEnable = true;
1.571 + return isEnabled;
1.572 +}
1.573 +
1.574 +bool ConsoleDetours::AddListener(IPluginFunction *fun, const char *command)
1.575 +{
1.576 + if (!IsAvailable())
1.577 + return false;
1.578 +
1.579 + if (command == NULL)
1.580 + {
1.581 + m_pForward->AddFunction(fun);
1.582 + }
1.583 + else
1.584 + {
1.585 + const char *str = UTIL_ToLowerCase(command);
1.586 + Listener *listener;
1.587 + Listener **plistener = m_CmdLookup.retrieve(str);
1.588 + if (plistener == NULL)
1.589 + {
1.590 + listener = new Listener;
1.591 + listener->forward = g_Forwards.CreateForwardEx(NULL, ET_Hook, 3, NULL, Param_Cell,
1.592 + Param_String, Param_Cell);
1.593 + m_CmdLookup.insert(str, listener);
1.594 + }
1.595 + else
1.596 + {
1.597 + listener = *plistener;
1.598 + }
1.599 + listener->forward->AddFunction(fun);
1.600 + delete [] str;
1.601 + }
1.602 +
1.603 + return true;
1.604 +}
1.605 +
1.606 +bool ConsoleDetours::RemoveListener(IPluginFunction *fun, const char *command)
1.607 +{
1.608 + if (command == NULL)
1.609 + {
1.610 + return m_pForward->RemoveFunction(fun);
1.611 + }
1.612 + else
1.613 + {
1.614 + const char *str = UTIL_ToLowerCase(command);
1.615 + Listener *listener;
1.616 + Listener **plistener = m_CmdLookup.retrieve(str);
1.617 + delete [] str;
1.618 + if (plistener == NULL)
1.619 + return false;
1.620 + listener = *plistener;
1.621 + return listener->forward->RemoveFunction(fun);
1.622 + }
1.623 +}
1.624 +
1.625 +cell_t ConsoleDetours::InternalDispatch(int client, const CCommand& args)
1.626 +{
1.627 + char name[255];
1.628 + const char *realname = args.Arg(0);
1.629 + size_t len = strlen(realname);
1.630 + for (size_t i = 0; i < len; i++)
1.631 + {
1.632 + if (realname[i] >= 'A' && realname[i] <= 'Z')
1.633 + name[i] = tolower(realname[i]);
1.634 + else
1.635 + name[i] = realname[i];
1.636 + }
1.637 + name[len] = '\0';
1.638 +
1.639 + cell_t result = Pl_Continue;
1.640 + m_pForward->PushCell(client);
1.641 + m_pForward->PushString(name);
1.642 + m_pForward->PushCell(args.ArgC() - 1);
1.643 + m_pForward->Execute(&result, NULL);
1.644 +
1.645 + /* Don't let plugins block this. */
1.646 + if (strcmp(name, "sm") == 0)
1.647 + result = Pl_Continue;
1.648 +
1.649 + if (result >= Pl_Stop)
1.650 + return result;
1.651 +
1.652 + Listener **plistener = m_CmdLookup.retrieve(name);
1.653 + if (plistener == NULL)
1.654 + return result;
1.655 + Listener *listener = *plistener;
1.656 + if (listener->forward->GetFunctionCount() == 0)
1.657 + return result;
1.658 +
1.659 + cell_t result2 = Pl_Continue;
1.660 + listener->forward->PushCell(client);
1.661 + listener->forward->PushString(name);
1.662 + listener->forward->PushCell(args.ArgC() - 1);
1.663 + listener->forward->Execute(&result2, NULL);
1.664 +
1.665 + if (result2 > result)
1.666 + result = result2;
1.667 +
1.668 + /* "sm" should not have flown through the above. */
1.669 + assert(strcmp(name, "sm") != 0 || result == Pl_Continue);
1.670 +
1.671 + return result;
1.672 +}
1.673 +
1.674 +#if SOURCE_ENGINE >= SE_ORANGEBOX
1.675 +cell_t ConsoleDetours::Dispatch(ConCommand *pBase, const CCommand& args)
1.676 +{
1.677 +#else
1.678 +cell_t ConsoleDetours::Dispatch(ConCommand *pBase)
1.679 +{
1.680 + CCommand args;
1.681 +#endif
1.682 + g_HL2.PushCommandStack(&args);
1.683 + cell_t res = g_ConsoleDetours.InternalDispatch(g_ConCmds.GetCommandClient(), args);
1.684 + g_HL2.PopCommandStack();
1.685 +
1.686 +#if SH_IMPL_VERSION < 4
1.687 + if (res >= Pl_Handled)
1.688 + {
1.689 + /* See bug 4020 - we can't optimize this because looking at the vtable
1.690 + * is probably more expensive, since there's no SH_GET_ORIG_VFNPTR_ENTRY.
1.691 + */
1.692 + SH_ADD_HOOK_STATICFUNC(ConCommand, Dispatch, pBase, DummyHook, false);
1.693 + dummy_hook_set = true;
1.694 + pBase->Dispatch();
1.695 + SH_REMOVE_HOOK_STATICFUNC(ConCommand, Dispatch, pBase, DummyHook, false);
1.696 + }
1.697 + else
1.698 + {
1.699 + /* Make sure the command gets invoked. See bug 4019 on making this better. */
1.700 + pBase->Dispatch();
1.701 + }
1.702 +#endif
1.703 +
1.704 + return res;
1.705 +}
