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Annotation of embedaddon/strongswan/src/libcharon/sa/xauth/xauth_manager.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: #define _GNU_SOURCE /* for stdndup() */
        !            17: #include <string.h>
        !            18: 
        !            19: #include "xauth_manager.h"
        !            20: 
        !            21: #include <collections/linked_list.h>
        !            22: #include <threading/rwlock.h>
        !            23: 
        !            24: typedef struct private_xauth_manager_t private_xauth_manager_t;
        !            25: typedef struct xauth_entry_t xauth_entry_t;
        !            26: 
        !            27: /**
        !            28:  * XAuth constructor entry
        !            29:  */
        !            30: struct xauth_entry_t {
        !            31: 
        !            32:        /**
        !            33:         * Xauth backend name
        !            34:         */
        !            35:        char *name;
        !            36: 
        !            37:        /**
        !            38:         * Role of the method, XAUTH_SERVER or XAUTH_PEER
        !            39:         */
        !            40:        xauth_role_t role;
        !            41: 
        !            42:        /**
        !            43:         * constructor function to create instance
        !            44:         */
        !            45:        xauth_constructor_t constructor;
        !            46: };
        !            47: 
        !            48: /**
        !            49:  * private data of xauth_manager
        !            50:  */
        !            51: struct private_xauth_manager_t {
        !            52: 
        !            53:        /**
        !            54:         * public functions
        !            55:         */
        !            56:        xauth_manager_t public;
        !            57: 
        !            58:        /**
        !            59:         * list of eap_entry_t's
        !            60:         */
        !            61:        linked_list_t *methods;
        !            62: 
        !            63:        /**
        !            64:         * rwlock to lock methods
        !            65:         */
        !            66:        rwlock_t *lock;
        !            67: };
        !            68: 
        !            69: METHOD(xauth_manager_t, add_method, void,
        !            70:        private_xauth_manager_t *this, char *name, xauth_role_t role,
        !            71:        xauth_constructor_t constructor)
        !            72: {
        !            73:        xauth_entry_t *entry;
        !            74: 
        !            75:        INIT(entry,
        !            76:                .name = name,
        !            77:                .role = role,
        !            78:                .constructor = constructor,
        !            79:        );
        !            80: 
        !            81:        this->lock->write_lock(this->lock);
        !            82:        this->methods->insert_last(this->methods, entry);
        !            83:        this->lock->unlock(this->lock);
        !            84: }
        !            85: 
        !            86: METHOD(xauth_manager_t, remove_method, void,
        !            87:        private_xauth_manager_t *this, xauth_constructor_t constructor)
        !            88: {
        !            89:        enumerator_t *enumerator;
        !            90:        xauth_entry_t *entry;
        !            91: 
        !            92:        this->lock->write_lock(this->lock);
        !            93:        enumerator = this->methods->create_enumerator(this->methods);
        !            94:        while (enumerator->enumerate(enumerator, &entry))
        !            95:        {
        !            96:                if (constructor == entry->constructor)
        !            97:                {
        !            98:                        this->methods->remove_at(this->methods, enumerator);
        !            99:                        free(entry);
        !           100:                }
        !           101:        }
        !           102:        enumerator->destroy(enumerator);
        !           103:        this->lock->unlock(this->lock);
        !           104: }
        !           105: 
        !           106: METHOD(xauth_manager_t, create_instance, xauth_method_t*,
        !           107:        private_xauth_manager_t *this, char *name, xauth_role_t role,
        !           108:        identification_t *server, identification_t *peer)
        !           109: {
        !           110:        enumerator_t *enumerator;
        !           111:        xauth_entry_t *entry;
        !           112:        xauth_method_t *method = NULL;
        !           113:        char *profile = NULL;
        !           114: 
        !           115:        if (name)
        !           116:        {
        !           117:                profile = strchr(name, ':');
        !           118:                if (profile)
        !           119:                {
        !           120:                        name = strndup(name, profile - name);
        !           121:                        profile++;
        !           122:                }
        !           123:        }
        !           124: 
        !           125:        this->lock->read_lock(this->lock);
        !           126:        enumerator = this->methods->create_enumerator(this->methods);
        !           127:        while (enumerator->enumerate(enumerator, &entry))
        !           128:        {
        !           129:                if (!name && streq(entry->name, "noauth"))
        !           130:                {       /* xauth-noauth has to be configured explicitly */
        !           131:                        continue;
        !           132:                }
        !           133:                if (role == entry->role && (!name || streq(name, entry->name)))
        !           134:                {
        !           135:                        method = entry->constructor(server, peer, profile);
        !           136:                        if (method)
        !           137:                        {
        !           138:                                break;
        !           139:                        }
        !           140:                }
        !           141:        }
        !           142:        enumerator->destroy(enumerator);
        !           143:        this->lock->unlock(this->lock);
        !           144:        if (profile)
        !           145:        {
        !           146:                free(name);
        !           147:        }
        !           148:        return method;
        !           149: }
        !           150: 
        !           151: METHOD(xauth_manager_t, destroy, void,
        !           152:        private_xauth_manager_t *this)
        !           153: {
        !           154:        this->methods->destroy_function(this->methods, free);
        !           155:        this->lock->destroy(this->lock);
        !           156:        free(this);
        !           157: }
        !           158: 
        !           159: /*
        !           160:  * See header
        !           161:  */
        !           162: xauth_manager_t *xauth_manager_create()
        !           163: {
        !           164:        private_xauth_manager_t *this;
        !           165: 
        !           166:        INIT(this,
        !           167:                .public = {
        !           168:                        .add_method = _add_method,
        !           169:                        .remove_method = _remove_method,
        !           170:                        .create_instance = _create_instance,
        !           171:                        .destroy = _destroy,
        !           172:                },
        !           173:                .methods = linked_list_create(),
        !           174:                .lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
        !           175:        );
        !           176: 
        !           177:        return &this->public;
        !           178: }