[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / netlabel / netlabel_user.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@paul-moore.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 <linux/gfp.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 __init 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_buffer *audit_buf;
	char *secctx;
	u32 secctx_len;

	if (audit_enabled == 0)
		return NULL;

	audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type);
	if (audit_buf == NULL)
		return NULL;

	audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
			 from_kuid(&init_user_ns, audit_info->loginuid),
			 audit_info->sessionid);

	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;
}
Commit	Line	Data
d15c345f PM	1	/*
	2	* NetLabel NETLINK Interface
	3	*
	4	* This file defines the NETLINK interface for the NetLabel system. The
	5	* NetLabel system manages static and dynamic label mappings for network
	6	* protocols such as CIPSO and RIPSO.
	7	*
82c21bfa	8	* Author: Paul Moore <paul@paul-moore.com>
d15c345f PM	9	*
	10	*/
	11
	12	/*
	13	* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or
	18	* (at your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	23	* the GNU General Public License for more details.
	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	28	*
	29	*/
	30
	31	#include <linux/init.h>
	32	#include <linux/types.h>
	33	#include <linux/list.h>
	34	#include <linux/socket.h>
32f50cde PM	35	#include <linux/audit.h>
	36	#include <linux/tty.h>
	37	#include <linux/security.h>
5a0e3ad6	38	#include <linux/gfp.h>
d15c345f PM	39	#include <net/sock.h>
	40	#include <net/netlink.h>
	41	#include <net/genetlink.h>
	42	#include <net/netlabel.h>
	43	#include <asm/bug.h>
	44
	45	#include "netlabel_mgmt.h"
	46	#include "netlabel_unlabeled.h"
	47	#include "netlabel_cipso_v4.h"
	48	#include "netlabel_user.h"
	49
	50	/*
	51	* NetLabel NETLINK Setup Functions
	52	*/
	53
	54	/**
	55	* netlbl_netlink_init - Initialize the NETLINK communication channel
	56	*
	57	* Description:
	58	* Call out to the NetLabel components so they can register their families and
	59	* commands with the Generic NETLINK mechanism. Returns zero on success and
	60	* non-zero on failure.
	61	*
	62	*/
05705e4e	63	int __init netlbl_netlink_init(void)
d15c345f PM	64	{
	65	int ret_val;
	66
	67	ret_val = netlbl_mgmt_genl_init();
	68	if (ret_val != 0)
	69	return ret_val;
	70
	71	ret_val = netlbl_cipsov4_genl_init();
	72	if (ret_val != 0)
	73	return ret_val;
	74
	75	ret_val = netlbl_unlabel_genl_init();
	76	if (ret_val != 0)
	77	return ret_val;
	78
	79	return 0;
	80	}
32f50cde PM	81
	82	/*
	83	* NetLabel Audit Functions
	84	*/
	85
	86	/**
	87	* netlbl_audit_start_common - Start an audit message
	88	* @type: audit message type
95d4e6be	89	* @audit_info: NetLabel audit information
32f50cde PM	90	*
	91	* Description:
	92	* Start an audit message using the type specified in @type and fill the audit
	93	* message with some fields common to all NetLabel audit messages. Returns
	94	* a pointer to the audit buffer on success, NULL on failure.
	95	*
	96	*/
95d4e6be PM	97	struct audit_buffer *netlbl_audit_start_common(int type,
95d4e6be PM	98	struct netlbl_audit *audit_info)
32f50cde	99	{
32f50cde	100	struct audit_buffer *audit_buf;
32f50cde PM	101	char *secctx;
	102	u32 secctx_len;
	103
de64688f PM	104	if (audit_enabled == 0)
	105	return NULL;
	106
94de7feb	107	audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type);
32f50cde PM	108	if (audit_buf == NULL)
	109	return NULL;
	110
2532386f	111	audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
e1760bd5	112	from_kuid(&init_user_ns, audit_info->loginuid),
2532386f	113	audit_info->sessionid);
32f50cde	114
95d4e6be PM	115	if (audit_info->secid != 0 &&
	116	security_secid_to_secctx(audit_info->secid,
	117	&secctx,
e6e0871c	118	&secctx_len) == 0) {
32f50cde	119	audit_log_format(audit_buf, " subj=%s", secctx);
e6e0871c PM	120	security_release_secctx(secctx, secctx_len);
e6e0871c PM	121	}
32f50cde PM	122
	123	return audit_buf;
	124	}