Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * NetLabel NETLINK Interface

 *

 * This file defines the NETLINK interface for the NetLabel system.  The

 * NetLabel system manages static and dynamic label mappings for network

 * protocols such as CIPSO and RIPSO.

 *

 * Author: Paul Moore <paul.moore@hp.com>

 *

 */

/*

 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006

 *

 * This program is free software;  you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY;  without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See

 * the GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program;  if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 */

#include <linux/init.h>

#include <linux/types.h>

#include <linux/list.h>

#include <linux/socket.h>

#include <linux/audit.h>

#include <linux/tty.h>

#include <linux/security.h>

#include <net/sock.h>

#include <net/netlink.h>

#include <net/genetlink.h>

#include <net/netlabel.h>

#include <asm/bug.h>

#include "netlabel_mgmt.h"

#include "netlabel_unlabeled.h"

#include "netlabel_cipso_v4.h"

#include "netlabel_user.h"

/*

 * NetLabel NETLINK Setup Functions

 */

/**

 * netlbl_netlink_init - Initialize the NETLINK communication channel

 *

 * Description:

 * Call out to the NetLabel components so they can register their families and

 * commands with the Generic NETLINK mechanism.  Returns zero on success and

 * non-zero on failure.

 *

 */

int netlbl_netlink_init(void)

{

        int ret_val;

        ret_val = netlbl_mgmt_genl_init();

        if (ret_val != 0)

                return ret_val;

        ret_val = netlbl_cipsov4_genl_init();

        if (ret_val != 0)

                return ret_val;

        ret_val = netlbl_unlabel_genl_init();

        if (ret_val != 0)

                return ret_val;

        return 0;

}

/*

 * NetLabel Audit Functions

 */

/**

 * netlbl_audit_start_common - Start an audit message

 * @type: audit message type

 * @audit_info: NetLabel audit information

 *

 * Description:

 * Start an audit message using the type specified in @type and fill the audit

 * message with some fields common to all NetLabel audit messages.  Returns

 * a pointer to the audit buffer on success, NULL on failure.

 *

 */

struct audit_buffer *netlbl_audit_start_common(int type,

                                               struct netlbl_audit *audit_info)

{

        struct audit_context *audit_ctx = current->audit_context;

        struct audit_buffer *audit_buf;

        char *secctx;

        u32 secctx_len;

        if (audit_enabled == 0)

                return NULL;

        audit_buf = audit_log_start(audit_ctx, GFP_ATOMIC, type);

        if (audit_buf == NULL)

                return NULL;

        audit_log_format(audit_buf, "netlabel: auid=%u", audit_info->loginuid);

        if (audit_info->secid != 0 &&

            security_secid_to_secctx(audit_info->secid,

                                     &secctx,

                                     &secctx_len) == 0) {

                audit_log_format(audit_buf, " subj=%s", secctx);

                security_release_secctx(secctx, secctx_len);

        }

        return audit_buf;

}