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Annotation of embedaddon/strongswan/src/libcharon/plugins/kernel_netlink/kernel_netlink_plugin.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2008 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: 
        !            17: #include "kernel_netlink_plugin.h"
        !            18: 
        !            19: #include "kernel_netlink_ipsec.h"
        !            20: #include "kernel_netlink_net.h"
        !            21: 
        !            22: #include <sa/task_manager.h>
        !            23: 
        !            24: typedef struct private_kernel_netlink_plugin_t private_kernel_netlink_plugin_t;
        !            25: 
        !            26: /**
        !            27:  * private data of kernel netlink plugin
        !            28:  */
        !            29: struct private_kernel_netlink_plugin_t {
        !            30:        /**
        !            31:         * implements plugin interface
        !            32:         */
        !            33:        kernel_netlink_plugin_t public;
        !            34: };
        !            35: 
        !            36: METHOD(plugin_t, get_name, char*,
        !            37:        private_kernel_netlink_plugin_t *this)
        !            38: {
        !            39:        return "kernel-netlink";
        !            40: }
        !            41: 
        !            42: METHOD(plugin_t, get_features, int,
        !            43:        private_kernel_netlink_plugin_t *this, plugin_feature_t *features[])
        !            44: {
        !            45:        static plugin_feature_t f[] = {
        !            46:                PLUGIN_CALLBACK(kernel_ipsec_register, kernel_netlink_ipsec_create),
        !            47:                        PLUGIN_PROVIDE(CUSTOM, "kernel-ipsec"),
        !            48:                PLUGIN_CALLBACK(kernel_net_register, kernel_netlink_net_create),
        !            49:                        PLUGIN_PROVIDE(CUSTOM, "kernel-net"),
        !            50:        };
        !            51:        *features = f;
        !            52:        return countof(f);
        !            53: }
        !            54: 
        !            55: METHOD(plugin_t, reload, bool,
        !            56:        private_kernel_netlink_plugin_t *this)
        !            57: {
        !            58:        u_int timeout;
        !            59:        FILE *f;
        !            60: 
        !            61:        f = fopen("/proc/sys/net/core/xfrm_acq_expires", "w");
        !            62:        if (f)
        !            63:        {
        !            64:                timeout = lib->settings->get_int(lib->settings,
        !            65:                                                        "%s.plugins.kernel-netlink.xfrm_acq_expires",
        !            66:                                                        task_manager_total_retransmit_timeout(), lib->ns);
        !            67:                fprintf(f, "%u", timeout);
        !            68:                fclose(f);
        !            69:        }
        !            70:        return TRUE;
        !            71: }
        !            72: 
        !            73: METHOD(plugin_t, destroy, void,
        !            74:        private_kernel_netlink_plugin_t *this)
        !            75: {
        !            76:        free(this);
        !            77: }
        !            78: 
        !            79: /*
        !            80:  * see header file
        !            81:  */
        !            82: plugin_t *kernel_netlink_plugin_create()
        !            83: {
        !            84:        private_kernel_netlink_plugin_t *this;
        !            85: 
        !            86:        if (!lib->caps->keep(lib->caps, CAP_NET_ADMIN))
        !            87:        {       /* required to bind/use XFRM sockets / create/modify routing tables, but
        !            88:                 * not if only the read-only parts of kernel-netlink-net are used, so
        !            89:                 * we don't fail here */
        !            90:                DBG1(DBG_KNL, "kernel-netlink plugin might require CAP_NET_ADMIN "
        !            91:                         "capability");
        !            92:        }
        !            93: 
        !            94:        INIT(this,
        !            95:                .public = {
        !            96:                        .plugin = {
        !            97:                                .get_name = _get_name,
        !            98:                                .get_features = _get_features,
        !            99:                                .reload = _reload,
        !           100:                                .destroy = _destroy,
        !           101:                        },
        !           102:                },
        !           103:        );
        !           104: 
        !           105:        reload(this);
        !           106: 
        !           107:        return &this->public.plugin;
        !           108: }