/*
* InspIRCd -- Internet Relay Chat Daemon
*
- * Copyright (C) 2017-2019 Sadie Powell <sadie@witchery.services>
+ * 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>
#include "inspircd.h"
-
#ifndef _WIN32
-#include <dlfcn.h>
-#else
-#define dlopen(path, state) (void*)LoadLibraryA(path)
-#define dlsym(handle, export) (void*)GetProcAddress((HMODULE)handle, export)
-#define dlclose(handle) FreeLibrary((HMODULE)handle)
+# 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)
{
- if (!strstr(fname,".so"))
+ 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...";
- h = NULL;
+ err.assign(name + " is not a module (no " DLL_EXTENSION " extension)");
return;
}
- h = dlopen(fname, RTLD_NOW|RTLD_LOCAL);
- if (!h)
- {
+#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 (h)
- dlclose(h);
+ if (!lib)
+ return;
+
+#ifdef _WIN32
+ FreeLibrary(lib);
+#else
+ dlclose(lib);
+#endif
}
Module* DLLManager::CallInit()
{
+ if (!lib)
+ return NULL;
+
+ const unsigned long* abi = GetSymbol<const unsigned long>(MODULE_STR_ABI);
+ if (!abi)
+ {
+ err.assign(libname + " is not a module (no ABI symbol)");
+ return NULL;
+ }
+ 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)();
};
- vptr = GetSymbol(MODULE_INIT_STR);
+ vptr = GetSymbol(MODULE_STR_INIT);
if (!vptr)
+ {
+ err.assign(libname + " is not a module (no init symbol)");
return NULL;
+ }
return (*fptr)();
}
-void* DLLManager::GetSymbol(const char* name)
+void* DLLManager::GetSymbol(const char* name) const
{
- return h ? dlsym(h, name) : NULL;
-}
+ if (!lib)
+ return NULL;
-std::string DLLManager::GetVersion()
-{
- const char* srcver = static_cast<const char*>(GetSymbol("inspircd_src_version"));
- return srcver ? srcver : "";
+#if defined _WIN32
+ return GetProcAddress(lib, name);
+#else
+ return dlsym(lib, name);
+#endif
}
void DLLManager::RetrieveLastError()