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Diffstat (limited to 'lib/plugins/InterfaceMgr/HBauth.c')
| -rw-r--r-- | lib/plugins/InterfaceMgr/HBauth.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/lib/plugins/InterfaceMgr/HBauth.c b/lib/plugins/InterfaceMgr/HBauth.c new file mode 100644 index 0000000..eae22cf --- /dev/null +++ b/lib/plugins/InterfaceMgr/HBauth.c @@ -0,0 +1,171 @@ +/* + * Heartbeat authentication interface manager + * + * Copyright 2001 Alan Robertson <alanr@unix.sh> + * Licensed under the GNU Lesser General Public License + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + */ +#define PIL_PLUGINTYPE InterfaceMgr +#define PIL_PLUGIN HBauth + +#define PIN(f) #f +#define PIN2(f) PIN(f) +#define PIN3 PIN2(PIL_PLUGIN) +#define PIT PIN2(PIL_PLUGINTYPE) + +/* We are a interface manager... */ +#define ENABLE_PLUGIN_MANAGER_PRIVATE + +#include <lha_internal.h> +#include <pils/interface.h> +#include <stdio.h> + +PIL_PLUGIN_BOILERPLATE2("1.0", AuthDebugFlag) + + +/* + * Places to store information gotten during registration. + */ +static const PILPluginImports* AuthPIImports; /* Imported plugin fcns */ +static PILPlugin* AuthPlugin; /* Our plugin info */ +static PILInterfaceImports* AuthIfImports; /* Interface imported fcns */ +static PILInterface* AuthIf; /* Our Auth Interface info */ + +/* Our exported auth interface management functions */ +static PIL_rc RegisterAuthIF(PILInterface* ifenv, void** imports); + +static PIL_rc UnregisterAuthIF(PILInterface*iifinfo); + +/* + * Our Interface Manager interfaces - exported to the universe! + * + * (or at least to the interface management universe ;-). + * + * These are the interfaces which are used to manage our + * client authentication interfaces + * + */ +static PILInterfaceOps AuthIfOps = +{ RegisterAuthIF +, UnregisterAuthIF +}; + + +PIL_rc PIL_PLUGIN_INIT(PILPlugin*us, PILPluginImports* imports, void*); + +/* + * Our user_ptr is presumed to point at a GHashTable for us + * to put plugin into when they show up, and drop from when + * they disappear. + * + * We need to think more carefully about the way for us to get + * the user_ptr from the global environment. + * + * We need to think more carefully about how interface registration + * etc. interact with plugin loading, reference counts, etc. and how + * the application that uses us (i.e., heartbeat) interacts with us. + * + * Issues include: + * - freeing all memory, + * - making sure things are all cleaned up correctly + * - Thread-safety? + * + * I think the global system should handle thread-safety. + */ + +PIL_rc +PIL_PLUGIN_INIT(PILPlugin*us, PILPluginImports* imports, void *user_ptr) +{ + PIL_rc ret; + /* + * Force compiler to check our parameters... + */ + PILPluginInitFun fun = &PIL_PLUGIN_INIT; (void)fun; + + + if (user_ptr == NULL) { + imports->log(PIL_CRIT + , "Interface Manager %s requires non-NULL " + " user pointer (to GHashTable) at initialization" + , PIN3); + return PIL_INVAL; + } + + AuthPIImports = imports; + AuthPlugin = us; + + /* Register as a plugin */ + imports->register_plugin(us, &OurPIExports); + + + /* Register our interfaces */ + ret = imports->register_interface(us + , PIT + , PIN3 + , &AuthIfOps + , NULL + , &AuthIf /* Our interface object pointer */ + , (void**)&AuthIfImports /* Interface-imported functions */ + , user_ptr); + return ret; +} + +/* + * We get called for every authentication interface that gets registered. + * + * It's our job to make the authentication interface that's + * registering with us available to the system. + * + * We do that by adding it to a g_hash_table of authentication + * plugin. The rest of the system takes it from there... + * The key is the authentication method, and the data + * is a pointer to the functions the method exports. + * It's a piece of cake ;-) + */ +static PIL_rc +RegisterAuthIF(PILInterface* intf, void** imports) +{ + GHashTable* authtbl = intf->ifmanager->ud_interface; + + g_assert(authtbl != NULL); + + /* Reference count should now be one */ + g_assert(intf->refcnt == 1); + g_hash_table_insert(authtbl, intf->interfacename, intf->exports); + + return PIL_OK; +} + +/* Unregister a client authentication interface - + * We get called from the interface mgmt sys when someone requests that + * a interface be unregistered. + */ +static PIL_rc +UnregisterAuthIF(PILInterface*intf) +{ + GHashTable* authtbl = intf->ifmanager->ud_interface; + g_assert(authtbl != NULL); + + intf->refcnt--; + g_assert(intf->refcnt >= 0); + if (intf->refcnt <= 0) { + g_hash_table_remove(authtbl, intf->interfacetype); + } + return PIL_OK; +} + |