Add support for blocking tag messages with the deaf mode.

[user/henk/code/inspircd.git] / src / dynamic.cpp

diff --git a/src/dynamic.cpp b/src/dynamic.cpp
index 4c822e4ca0a980e36c210437185443d5bc150a3b..5f69820c9ec84805a1bae24f9f7009c193bc392f 100644 (file)
--- a/src/dynamic.cpp
+++ b/src/dynamic.cpp
@@ -1,70 +1,135 @@
-#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);
+}