1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * NetLabel NETLINK Interface
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * This file defines the NETLINK interface for the NetLabel system. The
6*4882a593Smuzhiyun * NetLabel system manages static and dynamic label mappings for network
7*4882a593Smuzhiyun * protocols such as CIPSO and RIPSO.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Author: Paul Moore <paul@paul-moore.com>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
14*4882a593Smuzhiyun */
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/init.h>
17*4882a593Smuzhiyun #include <linux/types.h>
18*4882a593Smuzhiyun #include <linux/list.h>
19*4882a593Smuzhiyun #include <linux/socket.h>
20*4882a593Smuzhiyun #include <linux/audit.h>
21*4882a593Smuzhiyun #include <linux/tty.h>
22*4882a593Smuzhiyun #include <linux/security.h>
23*4882a593Smuzhiyun #include <linux/gfp.h>
24*4882a593Smuzhiyun #include <net/sock.h>
25*4882a593Smuzhiyun #include <net/netlink.h>
26*4882a593Smuzhiyun #include <net/genetlink.h>
27*4882a593Smuzhiyun #include <net/netlabel.h>
28*4882a593Smuzhiyun #include <asm/bug.h>
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #include "netlabel_mgmt.h"
31*4882a593Smuzhiyun #include "netlabel_unlabeled.h"
32*4882a593Smuzhiyun #include "netlabel_cipso_v4.h"
33*4882a593Smuzhiyun #include "netlabel_calipso.h"
34*4882a593Smuzhiyun #include "netlabel_user.h"
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun /*
37*4882a593Smuzhiyun * NetLabel NETLINK Setup Functions
38*4882a593Smuzhiyun */
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun /**
41*4882a593Smuzhiyun * netlbl_netlink_init - Initialize the NETLINK communication channel
42*4882a593Smuzhiyun *
43*4882a593Smuzhiyun * Description:
44*4882a593Smuzhiyun * Call out to the NetLabel components so they can register their families and
45*4882a593Smuzhiyun * commands with the Generic NETLINK mechanism. Returns zero on success and
46*4882a593Smuzhiyun * non-zero on failure.
47*4882a593Smuzhiyun *
48*4882a593Smuzhiyun */
netlbl_netlink_init(void)49*4882a593Smuzhiyun int __init netlbl_netlink_init(void)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun int ret_val;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun ret_val = netlbl_mgmt_genl_init();
54*4882a593Smuzhiyun if (ret_val != 0)
55*4882a593Smuzhiyun return ret_val;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun ret_val = netlbl_cipsov4_genl_init();
58*4882a593Smuzhiyun if (ret_val != 0)
59*4882a593Smuzhiyun return ret_val;
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun ret_val = netlbl_calipso_genl_init();
62*4882a593Smuzhiyun if (ret_val != 0)
63*4882a593Smuzhiyun return ret_val;
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun return netlbl_unlabel_genl_init();
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun /*
69*4882a593Smuzhiyun * NetLabel Audit Functions
70*4882a593Smuzhiyun */
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun /**
73*4882a593Smuzhiyun * netlbl_audit_start_common - Start an audit message
74*4882a593Smuzhiyun * @type: audit message type
75*4882a593Smuzhiyun * @audit_info: NetLabel audit information
76*4882a593Smuzhiyun *
77*4882a593Smuzhiyun * Description:
78*4882a593Smuzhiyun * Start an audit message using the type specified in @type and fill the audit
79*4882a593Smuzhiyun * message with some fields common to all NetLabel audit messages. Returns
80*4882a593Smuzhiyun * a pointer to the audit buffer on success, NULL on failure.
81*4882a593Smuzhiyun *
82*4882a593Smuzhiyun */
netlbl_audit_start_common(int type,struct netlbl_audit * audit_info)83*4882a593Smuzhiyun struct audit_buffer *netlbl_audit_start_common(int type,
84*4882a593Smuzhiyun struct netlbl_audit *audit_info)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun struct audit_buffer *audit_buf;
87*4882a593Smuzhiyun char *secctx;
88*4882a593Smuzhiyun u32 secctx_len;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun if (audit_enabled == AUDIT_OFF)
91*4882a593Smuzhiyun return NULL;
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun audit_buf = audit_log_start(audit_context(), GFP_ATOMIC, type);
94*4882a593Smuzhiyun if (audit_buf == NULL)
95*4882a593Smuzhiyun return NULL;
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
98*4882a593Smuzhiyun from_kuid(&init_user_ns, audit_info->loginuid),
99*4882a593Smuzhiyun audit_info->sessionid);
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun if (audit_info->secid != 0 &&
102*4882a593Smuzhiyun security_secid_to_secctx(audit_info->secid,
103*4882a593Smuzhiyun &secctx,
104*4882a593Smuzhiyun &secctx_len) == 0) {
105*4882a593Smuzhiyun audit_log_format(audit_buf, " subj=%s", secctx);
106*4882a593Smuzhiyun security_release_secctx(secctx, secctx_len);
107*4882a593Smuzhiyun }
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun return audit_buf;
110*4882a593Smuzhiyun }
111