-#include "globals.h"
-#include <dlfcn.h>
-#include "dynamic.h"
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ * 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) 2003, 2006, 2010 Craig Edwards <brain@inspircd.org>
+ *
+ * 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 "inspircd.h"
+#ifndef _WIN32
+# include <dlfcn.h>
+#endif
-DLLManager::DLLManager(const char *fname)
+/** The extension that dynamic libraries end with. */
+#define DLL_EXTENSION ".so"
+
+DLLManager::DLLManager(const std::string& name)
+ : lib(NULL)
+ , libname(name)
{
- // Try to open the library now and get any error message.
-
- h=dlopen( fname, RTLD_NOW );
- err=dlerror();
+ static size_t extlen = strlen(DLL_EXTENSION);
+ if (name.length() <= extlen || name.compare(name.length() - extlen, name.length(), DLL_EXTENSION))
+ {
+ err.assign(name + " is not a module (no " DLL_EXTENSION " extension)");
+ 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!=0)
- 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!=0 )
+ if (!lib)
+ return NULL;
+
+ const unsigned long* abi = GetSymbol<const unsigned long>(MODULE_STR_ABI);
+ if (!abi)
{
- *v = dlsym( h, sym_name );
- err=dlerror();
- if( err==0 )
- return true;
- else
- return false;
+ err.assign(libname + " is not a module (no ABI symbol)");
+ return NULL;
}
- else
- {
- return false;
+ else if (*abi != MODULE_ABI)
+ {
+ 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;
}
-
-}
+ union
+ {
+ void* vptr;
+ Module* (*fptr)();
+ };
-DLLFactoryBase::DLLFactoryBase(const char *fname, const char *factory) : DLLManager(fname)
-{
- // try get the factory function if there is no error yet
-
- factory_func=0;
-
- if( LastError()==0 )
- {
- GetSymbol( (void **)&factory_func, factory ? factory : "init_module" );
+ vptr = GetSymbol(MODULE_STR_INIT);
+ if (!vptr)
+ {
+ 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);
+}