125 строки
3.2 KiB
C
125 строки
3.2 KiB
C
/*
|
|
* 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"
|
|
|
|
/* do not do any auditing if audit_enabled == 0, see kernel/audit.c for
|
|
* details */
|
|
extern int audit_enabled;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
return audit_buf;
|
|
}
|