X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fdynamic.cpp;h=5f69820c9ec84805a1bae24f9f7009c193bc392f;hb=e2b0f3dc9ef4d56c71d7abda13e6139ca092e387;hp=3a6c0897c7c261f7b0b2157f8e7077af63f7d6db;hpb=6050df73f498d05597fb37c6157868df1f6f4db2;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/dynamic.cpp b/src/dynamic.cpp index 3a6c0897c..5f69820c9 100644 --- a/src/dynamic.cpp +++ b/src/dynamic.cpp @@ -1,203 +1,135 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev. - * E-mail: - * - * - * - * Written by Craig Edwards, Craig McLure, and others. - * This program is free but copyrighted software; see - * the file COPYING for details. + * Copyright (C) 2020 Matt Schatz + * Copyright (C) 2017-2020 Sadie Powell + * Copyright (C) 2014 Attila Molnar + * Copyright (C) 2012 Robby + * Copyright (C) 2012 ChrisTX + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2009 Uli Schlachter + * Copyright (C) 2007 Robin Burchell + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2003, 2006, 2010 Craig Edwards * - * --------------------------------------------------- + * 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 . */ -using namespace std; -#include "inspircd_config.h" -#include "configreader.h" -#include "globals.h" -#include "dynamic.h" - -#ifndef STATIC_LINK -#include -#else -#include "modlist.h" +#include "inspircd.h" +#ifndef _WIN32 +# include #endif -#include "inspstring.h" - -#include "inspircd.h" -#include -#include -#include +/** The extension that dynamic libraries end with. */ +#define DLL_EXTENSION ".so" -DLLManager::DLLManager(InspIRCd* ServerInstance, const char *fname) +DLLManager::DLLManager(const std::string& name) + : lib(NULL) + , libname(name) { - err = NULL; - - if (!strstr(fname,".so")) - { - err = "This doesn't look like a module file to me..."; - return; - } -#ifdef STATIC_LINK - this->staticname[0] = '\0'; - ServerInstance->Log(DEBUG,"Loading core-compiled module '%s'",fname); - for (int j = 0; modsyms[j].name; j++) - { - ServerInstance->Log(DEBUG,"Check %s",modsyms[j].name); - if (!strcmp(modsyms[j].name,fname)) - { - ServerInstance->Log(DEBUG,"Found %s",fname); - strlcpy(this->staticname,fname,1020); - err = 0; - return; - } - } - err = "Module is not statically compiled into the ircd"; -#else - // Copy the library to a temp location, this makes recompiles - // a little safer if the ircd is running at the time as the - // shared libraries are mmap()ed and not doing this causes - // segfaults. - FILE* x = fopen(fname,"rb"); - if (!x) + static size_t extlen = strlen(DLL_EXTENSION); + if (name.length() <= extlen || name.compare(name.length() - extlen, name.length(), DLL_EXTENSION)) { - err = strerror(errno); + err.assign(name + " is not a module (no " DLL_EXTENSION " extension)"); return; } - ServerInstance->Log(DEBUG,"Opened module file %s",fname); - char tmpfile_template[255]; - char buffer[65536]; - snprintf(tmpfile_template, 255, "%s/inspircd_file.so.%d.XXXXXXXXXX",ServerInstance->Config->TempDir,getpid()); - int fd = mkstemp(tmpfile_template); - if (fd == -1) - { - fclose(x); - err = strerror(errno); - return; - } - ServerInstance->Log(DEBUG,"Copying %s to %s",fname, tmpfile_template); - while (!feof(x)) - { - int n = fread(buffer, 1, 65535, x); - if (n) - { - int written = write(fd,buffer,n); - if (written != n) - { - fclose(x); - err = strerror(errno); - return; - } - } - } - ServerInstance->Log(DEBUG,"Copied entire file."); - // Try to open the library now and get any error message. - - if (close(fd) == -1) - err = strerror(errno); - if (fclose(x) == EOF) - err = strerror(errno); - - h = dlopen(fname, RTLD_NOW|RTLD_LOCAL); - if (!h) - { - ServerInstance->Log(DEBUG,"dlerror occured!"); - err = (char*)dlerror(); - return; - } - - ServerInstance->Log(DEBUG,"Finished loading '%s': %0x",tmpfile_template, h); - // We can delete the tempfile once it's loaded, leaving just the inode. - if (!err && !ServerInstance->Config->debugging) - { - ServerInstance->Log(DEBUG,"Deleteting %s",tmpfile_template); - if (unlink(tmpfile_template) == -1) - err = strerror(errno); - } +#ifdef _WIN32 + lib = LoadLibraryA(name.c_str()); +#else + lib = dlopen(name.c_str(), RTLD_NOW|RTLD_LOCAL); #endif + + if (!lib) + RetrieveLastError(); } DLLManager::~DLLManager() { -#ifndef STATIC_LINK - // close the library if it isn't null - if (h) - dlclose(h); + if (!lib) + return; + +#ifdef _WIN32 + FreeLibrary(lib); +#else + dlclose(lib); #endif } - - -#ifdef STATIC_LINK - -bool DLLManager::GetSymbol(initfunc* &v, const char *sym_name) +Module* DLLManager::CallInit() { - for (int j = 0; modsyms[j].name; j++) - { - if (!strcmp(this->staticname,modsyms[j].name)) - { - v = modsyms[j].value; - err = 0; - return true; - } - } - err = "Module symbol missing from the core"; - return false; -} + if (!lib) + return NULL; -#else - -bool DLLManager::GetSymbol(void** v, const char* sym_name) -{ - // try extract a symbol from the library - // get any error message is there is any - - if (h) + const unsigned long* abi = GetSymbol(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; + + union + { + void* vptr; + Module* (*fptr)(); + }; + + vptr = GetSymbol(MODULE_STR_INIT); + if (!vptr) + { + err.assign(libname + " is not a module (no init symbol)"); + return NULL; } -} -#endif + return (*fptr)(); +} -DLLFactoryBase::DLLFactoryBase(InspIRCd* Instance, const char* fname, const char* symbol) : DLLManager(Instance, fname) +void* DLLManager::GetSymbol(const char* name) const { - // try get the factory function if there is no error yet - factory_func = 0; - - if (!LastError()) - { -#ifdef STATIC_LINK - if (!GetSymbol( factory_func, symbol ? symbol : "init_module")) + if (!lib) + return NULL; + +#if defined _WIN32 + return GetProcAddress(lib, name); #else - if (!GetSymbol( (void **)&factory_func, symbol ? symbol : "init_module")) + return dlsym(lib, name); #endif - { - throw ModuleException("Missing init_module() entrypoint!"); - } - } } -DLLFactoryBase::~DLLFactoryBase() +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); +}