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