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 * 8 * Author: Paul Moore <paul.moore@hp.com> 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> 35#include <linux/audit.h> 36#include <linux/tty.h> 37#include <linux/security.h> 38#include <linux/gfp.h> 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 */ 63int __init netlbl_netlink_init(void) 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} 81 82/* 83 * NetLabel Audit Functions 84 */ 85 86/** 87 * netlbl_audit_start_common - Start an audit message 88 * @type: audit message type 89 * @audit_info: NetLabel audit information 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 */ 97struct audit_buffer *netlbl_audit_start_common(int type, 98 struct netlbl_audit *audit_info) 99{ 100 struct audit_buffer *audit_buf; 101 char *secctx; 102 u32 secctx_len; 103 104 if (audit_enabled == 0) 105 return NULL; 106 107 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type); 108 if (audit_buf == NULL) 109 return NULL; 110 111 audit_log_format(audit_buf, "netlabel: auid=%u ses=%u", 112 audit_info->loginuid, 113 audit_info->sessionid); 114 115 if (audit_info->secid != 0 && 116 security_secid_to_secctx(audit_info->secid, 117 &secctx, 118 &secctx_len) == 0) { 119 audit_log_format(audit_buf, " subj=%s", secctx); 120 security_release_secctx(secctx, secctx_len); 121 } 122 123 return audit_buf; 124} 125