X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fdynamic.cpp;h=3df91e41f4037eb2f3fc1d550e3f4a229c2786a9;hb=f3f2388a81b6463e1229fa5bf2b8c427440bf406;hp=ab1e6fa9b9ff2b53697dc08afcc2da0630012845;hpb=9cf56d917d92959701694477f7944d45ad2c38ed;p=user%2Fhenk%2Fcode%2Finspircd.git

diff --git a/src/dynamic.cpp b/src/dynamic.cpp
index ab1e6fa9b..3df91e41f 100644
--- a/src/dynamic.cpp
+++ b/src/dynamic.cpp
@@ -1,90 +1,135 @@
-/*       +------------------------------------+
- *       | Inspire Internet Relay Chat Daemon |
- *       +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
  *
- *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ *   Copyright (C) 2020 Matt Schatz <genius3000@g3k.solutions>
+ *   Copyright (C) 2017-2020 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2014 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
+ *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
+ *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006, 2010 Craig Edwards <brain@inspircd.org>
  *
- * This program is free but copyrighted software; see
- *            the file COPYING for details.
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
  *
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "configreader.h"
-#include "dynamic.h"
-#ifndef WIN32
-#include <dlfcn.h>
-#endif
 
 #include "inspircd.h"
+#ifndef _WIN32
+# include <dlfcn.h>
+#endif
 
-DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname)
-{
-	err = NULL;
+/** The extension that dynamic libraries end with. */
+#define DLL_EXTENSION ".so"
 
-	if (!strstr(fname,".so"))
+DLLManager::DLLManager(const std::string& name)
+	: lib(NULL)
+	, libname(name)
+{
+	static size_t extlen = strlen(DLL_EXTENSION);
+	if (name.length() <= extlen || name.compare(name.length() - extlen, name.length(), DLL_EXTENSION))
 	{
-		err = "This doesn't look like a module file to me...";
+		err.assign(name + " is not a module (no " DLL_EXTENSION " extension)");
 		return;
 	}
 
-	h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
-	if (!h)
-	{
-		err = (char*)dlerror();
-		return;
-	}
+#ifdef _WIN32
+	lib = LoadLibraryA(name.c_str());
+#else
+	lib = dlopen(name.c_str(), RTLD_NOW|RTLD_LOCAL);
+#endif
+
+	if (!lib)
+		RetrieveLastError();
 }
 
 DLLManager::~DLLManager()
 {
-	// close the library if it isn't null
-	if (h)
-		dlclose(h);
-}
-
+	if (!lib)
+		return;
 
+#ifdef _WIN32
+	FreeLibrary(lib);
+#else
+	dlclose(lib);
+#endif
+}
 
-bool DLLManager::GetSymbol(void** v, const char* sym_name)
+Module* DLLManager::CallInit()
 {
-	// try extract a symbol from the library
-	// get any error message is there is any
-	
-	if (h)
+	if (!lib)
+		return NULL;
+
+	const unsigned long* abi = GetSymbol<const unsigned long>(MODULE_STR_ABI);
+	if (!abi)
 	{
-		dlerror(); // clear value
-		*v = dlsym(h, sym_name);
-		err = (char*)dlerror();
-		if (!*v || err)
-			return false;
+		err.assign(libname + " is not a module (no ABI symbol)");
+		return NULL;
 	}
-	
-	if (err)
+	else if (*abi != MODULE_ABI)
 	{
-		return false;
+		const char* version = GetVersion();
+		err.assign(InspIRCd::Format("%s was built against %s (%lu) which is too %s to use with %s (%lu).",
+			libname.c_str(), version ? version : "an unknown version", *abi,
+			*abi < MODULE_ABI ? "old" : "new", INSPIRCD_VERSION, MODULE_ABI));
+		return NULL;
 	}
-	else
-	{	
-		return true;
-	}
-}
 
-DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname)
-{
-	// try get the factory function if there is no error yet
-	factory_func = 0;
-	
-	if (!LastError())
+	union
+	{
+		void* vptr;
+		Module* (*fptr)();
+	};
+
+	vptr = GetSymbol(MODULE_STR_INIT);
+	if (!vptr)
 	{
-		if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module"))
-		{
-			throw ModuleException("Missing init_module() entrypoint!");
-		}
+		err.assign(libname + " is not a module (no init symbol)");
+		return NULL;
 	}
+
+	return (*fptr)();
 }
 
-DLLFactoryBase::~DLLFactoryBase()
+void* DLLManager::GetSymbol(const char* name) const
 {
+	if (!lib)
+		return NULL;
+
+#if defined _WIN32
+	return GetProcAddress(lib, name);
+#else
+	return dlsym(lib, name);
+#endif
 }
 
+void DLLManager::RetrieveLastError()
+{
+#if defined _WIN32
+	char errmsg[500];
+	DWORD dwErrorCode = GetLastError();
+	if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)errmsg, _countof(errmsg), NULL) == 0)
+		sprintf_s(errmsg, _countof(errmsg), "Error code: %u", dwErrorCode);
+	SetLastError(ERROR_SUCCESS);
+	err = errmsg;
+#else
+	const char* errmsg = dlerror();
+	err = errmsg ? errmsg : "Unknown error";
+#endif
+
+	std::string::size_type p;
+	while ((p = err.find_last_of("\r\n")) != std::string::npos)
+		err.erase(p, 1);
+}