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Annotation of embedaddon/strongswan/src/libcharon/plugins/coupling/coupling_plugin.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2011 Martin Willi
                      3:  * Copyright (C) 2011 revosec AG
                      4:  *
                      5:  * This program is free software; you can redistribute it and/or modify it
                      6:  * under the terms of the GNU General Public License as published by the
                      7:  * Free Software Foundation; either version 2 of the License, or (at your
                      8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
                      9:  *
                     10:  * This program is distributed in the hope that it will be useful, but
                     11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
                     13:  * for more details.
                     14:  */
                     15: 
                     16: #include "coupling_plugin.h"
                     17: 
                     18: #include "coupling_validator.h"
                     19: 
                     20: #include <daemon.h>
                     21: 
                     22: typedef struct private_coupling_plugin_t private_coupling_plugin_t;
                     23: 
                     24: /**
                     25:  * private data of coupling plugin
                     26:  */
                     27: struct private_coupling_plugin_t {
                     28: 
                     29:        /**
                     30:         * implements plugin interface
                     31:         */
                     32:        coupling_plugin_t public;
                     33: 
                     34:        /**
                     35:         * validator controlling couplings
                     36:         */
                     37:        coupling_validator_t *validator;
                     38: };
                     39: 
                     40: METHOD(plugin_t, get_name, char*,
                     41:        private_coupling_plugin_t *this)
                     42: {
                     43:        return "coupling";
                     44: }
                     45: 
                     46: /**
                     47:  * Since the validator instantiates a hasher we create it as plugin feature.
                     48:  * The default is SHA1 which we soft depend but depending on the plugin order
                     49:  * there is no guarantee that the configured algorithm is registered.
                     50:  */
                     51: static bool plugin_cb(private_coupling_plugin_t *this,
                     52:                                          plugin_feature_t *feature, bool reg, void *cb_data)
                     53: {
                     54:        if (reg)
                     55:        {
                     56:                this->validator = coupling_validator_create();
                     57: 
                     58:                if (!this->validator)
                     59:                {
                     60:                        return FALSE;
                     61:                }
                     62:                lib->credmgr->add_validator(lib->credmgr, &this->validator->validator);
                     63:        }
                     64:        else
                     65:        {
                     66:                lib->credmgr->remove_validator(lib->credmgr,
                     67:                                                                           &this->validator->validator);
                     68:                this->validator->destroy(this->validator);
                     69:        }
                     70:        return TRUE;
                     71: }
                     72: 
                     73: METHOD(plugin_t, get_features, int,
                     74:        private_coupling_plugin_t *this, plugin_feature_t *features[])
                     75: {
                     76:        static plugin_feature_t f[] = {
                     77:                PLUGIN_CALLBACK((plugin_feature_callback_t)plugin_cb, NULL),
                     78:                        PLUGIN_PROVIDE(CUSTOM, "coupling"),
                     79:                                PLUGIN_SDEPEND(HASHER, HASH_SHA1),
                     80:        };
                     81:        *features = f;
                     82:        return countof(f);
                     83: }
                     84: 
                     85: METHOD(plugin_t, destroy, void,
                     86:        private_coupling_plugin_t *this)
                     87: {
                     88:        free(this);
                     89: }
                     90: 
                     91: /**
                     92:  * Plugin constructor
                     93:  */
                     94: plugin_t *coupling_plugin_create()
                     95: {
                     96:        private_coupling_plugin_t *this;
                     97: 
                     98:        INIT(this,
                     99:                .public = {
                    100:                        .plugin = {
                    101:                                .get_name = _get_name,
                    102:                                .get_features = _get_features,
                    103:                                .destroy = _destroy,
                    104:                        },
                    105:                },
                    106:        );
                    107: 
                    108:        return &this->public.plugin;
                    109: }