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Annotation of embedaddon/strongswan/src/libcharon/sa/ikev2/tasks/ike_redirect.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2015 Tobias Brunner
        !             3:  * HSR Hochschule fuer Technik Rapperswil
        !             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 "ike_redirect.h"
        !            17: 
        !            18: #include <daemon.h>
        !            19: #include <processing/jobs/delete_ike_sa_job.h>
        !            20: 
        !            21: typedef struct private_ike_redirect_t private_ike_redirect_t;
        !            22: 
        !            23: /**
        !            24:  * Private members
        !            25:  */
        !            26: struct private_ike_redirect_t {
        !            27: 
        !            28:        /**
        !            29:         * Public interface
        !            30:         */
        !            31:        ike_redirect_t public;
        !            32: 
        !            33:        /**
        !            34:         * Assigned IKE_SA
        !            35:         */
        !            36:        ike_sa_t *ike_sa;
        !            37: 
        !            38:        /**
        !            39:         * Gateway ID to redirect to
        !            40:         */
        !            41:        identification_t *gateway;
        !            42: };
        !            43: 
        !            44: METHOD(task_t, build_i, status_t,
        !            45:        private_ike_redirect_t *this, message_t *message)
        !            46: {
        !            47:        chunk_t data;
        !            48: 
        !            49:        DBG1(DBG_IKE, "redirecting peer to %Y", this->gateway);
        !            50:        data = redirect_data_create(this->gateway, chunk_empty);
        !            51:        message->add_notify(message, FALSE, REDIRECT, data);
        !            52:        chunk_free(&data);
        !            53:        this->ike_sa->set_condition(this->ike_sa, COND_REDIRECTED, TRUE);
        !            54:        return NEED_MORE;
        !            55: }
        !            56: 
        !            57: METHOD(task_t, process_r, status_t,
        !            58:        private_ike_redirect_t *this, message_t *message)
        !            59: {
        !            60:        notify_payload_t *notify;
        !            61:        identification_t *to;
        !            62: 
        !            63:        notify = message->get_notify(message, REDIRECT);
        !            64:        if (!notify)
        !            65:        {
        !            66:                return SUCCESS;
        !            67:        }
        !            68: 
        !            69:        to = redirect_data_parse(notify->get_notification_data(notify), NULL);
        !            70:        if (!to)
        !            71:        {
        !            72:                DBG1(DBG_IKE, "received invalid REDIRECT notify");
        !            73:        }
        !            74:        else
        !            75:        {
        !            76:                this->ike_sa->handle_redirect(this->ike_sa, to);
        !            77:                to->destroy(to);
        !            78:        }
        !            79:        return SUCCESS;
        !            80: }
        !            81: 
        !            82: METHOD(task_t, build_r, status_t,
        !            83:        private_ike_redirect_t *this, message_t *message)
        !            84: {
        !            85:        /* not called because SUCCESS is returned above */
        !            86:        return SUCCESS;
        !            87: }
        !            88: 
        !            89: METHOD(task_t, process_i, status_t,
        !            90:        private_ike_redirect_t *this, message_t *message)
        !            91: {
        !            92:        delete_ike_sa_job_t *job;
        !            93: 
        !            94:        /* if the peer does not delete the SA we do so after a while */
        !            95:        job = delete_ike_sa_job_create(this->ike_sa->get_id(this->ike_sa), TRUE);
        !            96:        lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
        !            97:                                        lib->settings->get_int(lib->settings,
        !            98:                                                        "%s.half_open_timeout", HALF_OPEN_IKE_SA_TIMEOUT,
        !            99:                                                        lib->ns));
        !           100:        return SUCCESS;
        !           101: }
        !           102: 
        !           103: METHOD(task_t, get_type, task_type_t,
        !           104:        private_ike_redirect_t *this)
        !           105: {
        !           106:        return TASK_IKE_REDIRECT;
        !           107: }
        !           108: 
        !           109: METHOD(task_t, migrate, void,
        !           110:        private_ike_redirect_t *this, ike_sa_t *ike_sa)
        !           111: {
        !           112:        this->ike_sa = ike_sa;
        !           113: }
        !           114: 
        !           115: METHOD(task_t, destroy, void,
        !           116:        private_ike_redirect_t *this)
        !           117: {
        !           118:        DESTROY_IF(this->gateway);
        !           119:        free(this);
        !           120: }
        !           121: 
        !           122: /*
        !           123:  * Described in header.
        !           124:  */
        !           125: ike_redirect_t *ike_redirect_create(ike_sa_t *ike_sa, identification_t *to)
        !           126: {
        !           127:        private_ike_redirect_t *this;
        !           128: 
        !           129:        INIT(this,
        !           130:                .public = {
        !           131:                        .task = {
        !           132:                                .get_type = _get_type,
        !           133:                                .build = _build_r,
        !           134:                                .process = _process_r,
        !           135:                                .migrate = _migrate,
        !           136:                                .destroy = _destroy,
        !           137:                        },
        !           138:                },
        !           139:                .ike_sa = ike_sa,
        !           140:        );
        !           141: 
        !           142:        if (to)
        !           143:        {
        !           144:                this->gateway = to->clone(to);
        !           145:                this->public.task.build = _build_i;
        !           146:                this->public.task.process = _process_i;
        !           147:        }
        !           148: 
        !           149:        return &this->public;
        !           150: }