| Paul Moore | d15c345 | 2006-08-03 16:48:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NetLabel Unlabeled Support |
| 3 | * |
| 4 | * This file defines functions for dealing with unlabeled packets for the |
| 5 | * NetLabel system. The NetLabel system manages static and dynamic label |
| 6 | * mappings for network 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 | #ifndef _NETLABEL_UNLABELED_H |
| 32 | #define _NETLABEL_UNLABELED_H |
| 33 | |
| 34 | #include <net/netlabel.h> |
| 35 | |
| 36 | /* |
| 37 | * The following NetLabel payloads are supported by the Unlabeled subsystem. |
| 38 | * |
| 39 | * o ACK: |
| 40 | * Sent by the kernel in response to an applications message, applications |
| 41 | * should never send this message. |
| 42 | * |
| 43 | * +----------------------+-----------------------+ |
| 44 | * | seq number (32 bits) | return code (32 bits) | |
| 45 | * +----------------------+-----------------------+ |
| 46 | * |
| 47 | * seq number: the sequence number of the original message, taken from the |
| 48 | * nlmsghdr structure |
| 49 | * return code: return value, based on errno values |
| 50 | * |
| 51 | * o ACCEPT |
| 52 | * This message is sent from an application to specify if the kernel should |
| 53 | * allow unlabled packets to pass if they do not match any of the static |
| 54 | * mappings defined in the unlabeled module. |
| 55 | * |
| 56 | * +-----------------+ |
| 57 | * | allow (32 bits) | |
| 58 | * +-----------------+ |
| 59 | * |
| 60 | * allow: if true (1) then allow the packets to pass, if false (0) then |
| 61 | * reject the packets |
| 62 | * |
| 63 | * o LIST |
| 64 | * This message can be sent either from an application or by the kernel in |
| 65 | * response to an application generated LIST message. When sent by an |
| 66 | * application there is no payload. The kernel should respond to a LIST |
| 67 | * message either with a LIST message on success or an ACK message on |
| 68 | * failure. |
| 69 | * |
| 70 | * +-----------------------+ |
| 71 | * | accept flag (32 bits) | |
| 72 | * +-----------------------+ |
| 73 | * |
| 74 | * accept flag: if true (1) then unlabeled packets are allowed to pass, |
| 75 | * if false (0) then unlabeled packets are rejected |
| 76 | * |
| 77 | */ |
| 78 | |
| 79 | /* NetLabel Unlabeled commands */ |
| 80 | enum { |
| 81 | NLBL_UNLABEL_C_UNSPEC, |
| 82 | NLBL_UNLABEL_C_ACK, |
| 83 | NLBL_UNLABEL_C_ACCEPT, |
| 84 | NLBL_UNLABEL_C_LIST, |
| 85 | __NLBL_UNLABEL_C_MAX, |
| 86 | }; |
| 87 | #define NLBL_UNLABEL_C_MAX (__NLBL_UNLABEL_C_MAX - 1) |
| 88 | |
| 89 | /* NetLabel protocol functions */ |
| 90 | int netlbl_unlabel_genl_init(void); |
| 91 | |
| 92 | /* Process Unlabeled incoming network packets */ |
| 93 | int netlbl_unlabel_getattr(struct netlbl_lsm_secattr *secattr); |
| 94 | |
| 95 | /* Set the default configuration to allow Unlabeled packets */ |
| 96 | int netlbl_unlabel_defconf(void); |
| 97 | |
| 98 | #endif |