[NetLabel]: CIPSOv4 and Unlabeled packet integration
Add CIPSO/IPv4 and unlabeled packet management to the NetLabel subsystem. The CIPSO/IPv4 changes allow the configuration of CIPSO/IPv4 within the overall NetLabel framework. The unlabeled packet changes allows NetLabel to pass unlabeled packets without error. Signed-off-by: Paul Moore <paul.moore@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Moore
David S. Miller
parent
d15c345fe3
commit
96cb8e3313
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@ -0,0 +1,542 @@
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/*
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* NetLabel CIPSO/IPv4 Support
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*
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* This file defines the CIPSO/IPv4 functions for the NetLabel system. The
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* NetLabel system manages static and dynamic label mappings for network
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* protocols such as CIPSO and RIPSO.
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*
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* Author: Paul Moore <paul.moore@hp.com>
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*
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*/
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/*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/string.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <net/netlink.h>
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#include <net/genetlink.h>
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#include <net/netlabel.h>
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#include <net/cipso_ipv4.h>
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#include "netlabel_user.h"
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#include "netlabel_cipso_v4.h"
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/* NetLabel Generic NETLINK CIPSOv4 family */
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static struct genl_family netlbl_cipsov4_gnl_family = {
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.id = GENL_ID_GENERATE,
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.hdrsize = 0,
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.name = NETLBL_NLTYPE_CIPSOV4_NAME,
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.version = NETLBL_PROTO_VERSION,
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.maxattr = 0,
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};
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/*
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* Helper Functions
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*/
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/**
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* netlbl_cipsov4_doi_free - Frees a CIPSO V4 DOI definition
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* @entry: the entry's RCU field
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*
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* Description:
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* This function is designed to be used as a callback to the call_rcu()
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* function so that the memory allocated to the DOI definition can be released
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* safely.
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*
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*/
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static void netlbl_cipsov4_doi_free(struct rcu_head *entry)
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{
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struct cipso_v4_doi *ptr;
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ptr = container_of(entry, struct cipso_v4_doi, rcu);
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switch (ptr->type) {
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case CIPSO_V4_MAP_STD:
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kfree(ptr->map.std->lvl.cipso);
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kfree(ptr->map.std->lvl.local);
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kfree(ptr->map.std->cat.cipso);
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kfree(ptr->map.std->cat.local);
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break;
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}
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kfree(ptr);
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}
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/*
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* NetLabel Command Handlers
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*/
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/**
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* netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
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* @doi: the DOI value
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* @msg: the ADD message data
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* @msg_size: the size of the ADD message buffer
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*
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* Description:
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* Create a new CIPSO_V4_MAP_STD DOI definition based on the given ADD message
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* and add it to the CIPSO V4 engine. Return zero on success and non-zero on
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* error.
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*
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*/
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static int netlbl_cipsov4_add_std(u32 doi, struct nlattr *msg, size_t msg_size)
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{
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int ret_val = -EINVAL;
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int msg_len = msg_size;
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u32 num_tags;
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u32 num_lvls;
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u32 num_cats;
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struct cipso_v4_doi *doi_def = NULL;
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u32 iter;
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u32 tmp_val_a;
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u32 tmp_val_b;
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if (msg_len < NETLBL_LEN_U32)
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goto add_std_failure;
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num_tags = netlbl_getinc_u32(&msg, &msg_len);
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if (num_tags == 0 || num_tags > CIPSO_V4_TAG_MAXCNT)
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goto add_std_failure;
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doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
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if (doi_def == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->map.std = kzalloc(sizeof(*doi_def->map.std), GFP_KERNEL);
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if (doi_def->map.std == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->type = CIPSO_V4_MAP_STD;
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for (iter = 0; iter < num_tags; iter++) {
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if (msg_len < NETLBL_LEN_U8)
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goto add_std_failure;
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doi_def->tags[iter] = netlbl_getinc_u8(&msg, &msg_len);
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switch (doi_def->tags[iter]) {
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case CIPSO_V4_TAG_RBITMAP:
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break;
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default:
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goto add_std_failure;
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}
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}
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if (iter < CIPSO_V4_TAG_MAXCNT)
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doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
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if (msg_len < 6 * NETLBL_LEN_U32)
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goto add_std_failure;
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num_lvls = netlbl_getinc_u32(&msg, &msg_len);
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if (num_lvls == 0)
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goto add_std_failure;
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doi_def->map.std->lvl.local_size = netlbl_getinc_u32(&msg, &msg_len);
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if (doi_def->map.std->lvl.local_size > CIPSO_V4_MAX_LOC_LVLS)
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goto add_std_failure;
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doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->lvl.local == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->map.std->lvl.cipso_size = netlbl_getinc_u8(&msg, &msg_len);
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if (doi_def->map.std->lvl.cipso_size > CIPSO_V4_MAX_REM_LVLS)
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goto add_std_failure;
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doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->lvl.cipso == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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num_cats = netlbl_getinc_u32(&msg, &msg_len);
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doi_def->map.std->cat.local_size = netlbl_getinc_u32(&msg, &msg_len);
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if (doi_def->map.std->cat.local_size > CIPSO_V4_MAX_LOC_CATS)
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goto add_std_failure;
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doi_def->map.std->cat.local = kcalloc(doi_def->map.std->cat.local_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->cat.local == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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doi_def->map.std->cat.cipso_size = netlbl_getinc_u16(&msg, &msg_len);
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if (doi_def->map.std->cat.cipso_size > CIPSO_V4_MAX_REM_CATS)
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goto add_std_failure;
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doi_def->map.std->cat.cipso = kcalloc(doi_def->map.std->cat.cipso_size,
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sizeof(u32),
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GFP_KERNEL);
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if (doi_def->map.std->cat.cipso == NULL) {
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ret_val = -ENOMEM;
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goto add_std_failure;
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}
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if (msg_len <
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num_lvls * (NETLBL_LEN_U32 + NETLBL_LEN_U8) +
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num_cats * (NETLBL_LEN_U32 + NETLBL_LEN_U16))
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goto add_std_failure;
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for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++)
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doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL;
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for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++)
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doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL;
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for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++)
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doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT;
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for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++)
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doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT;
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for (iter = 0; iter < num_lvls; iter++) {
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tmp_val_a = netlbl_getinc_u32(&msg, &msg_len);
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tmp_val_b = netlbl_getinc_u8(&msg, &msg_len);
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if (tmp_val_a >= doi_def->map.std->lvl.local_size ||
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tmp_val_b >= doi_def->map.std->lvl.cipso_size)
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goto add_std_failure;
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doi_def->map.std->lvl.cipso[tmp_val_b] = tmp_val_a;
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doi_def->map.std->lvl.local[tmp_val_a] = tmp_val_b;
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}
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for (iter = 0; iter < num_cats; iter++) {
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tmp_val_a = netlbl_getinc_u32(&msg, &msg_len);
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tmp_val_b = netlbl_getinc_u16(&msg, &msg_len);
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if (tmp_val_a >= doi_def->map.std->cat.local_size ||
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tmp_val_b >= doi_def->map.std->cat.cipso_size)
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goto add_std_failure;
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doi_def->map.std->cat.cipso[tmp_val_b] = tmp_val_a;
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doi_def->map.std->cat.local[tmp_val_a] = tmp_val_b;
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}
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doi_def->doi = doi;
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ret_val = cipso_v4_doi_add(doi_def);
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if (ret_val != 0)
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goto add_std_failure;
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return 0;
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add_std_failure:
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if (doi_def)
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netlbl_cipsov4_doi_free(&doi_def->rcu);
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return ret_val;
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}
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/**
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* netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
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* @doi: the DOI value
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* @msg: the ADD message data
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* @msg_size: the size of the ADD message buffer
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*
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* Description:
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* Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
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* and add it to the CIPSO V4 engine. Return zero on success and non-zero on
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* error.
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*
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*/
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static int netlbl_cipsov4_add_pass(u32 doi,
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struct nlattr *msg,
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size_t msg_size)
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{
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int ret_val = -EINVAL;
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int msg_len = msg_size;
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u32 num_tags;
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struct cipso_v4_doi *doi_def = NULL;
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u32 iter;
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if (msg_len < NETLBL_LEN_U32)
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goto add_pass_failure;
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num_tags = netlbl_getinc_u32(&msg, &msg_len);
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if (num_tags == 0 || num_tags > CIPSO_V4_TAG_MAXCNT)
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goto add_pass_failure;
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doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
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if (doi_def == NULL) {
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ret_val = -ENOMEM;
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goto add_pass_failure;
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}
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doi_def->type = CIPSO_V4_MAP_PASS;
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for (iter = 0; iter < num_tags; iter++) {
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if (msg_len < NETLBL_LEN_U8)
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goto add_pass_failure;
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doi_def->tags[iter] = netlbl_getinc_u8(&msg, &msg_len);
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switch (doi_def->tags[iter]) {
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case CIPSO_V4_TAG_RBITMAP:
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break;
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default:
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goto add_pass_failure;
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}
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}
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if (iter < CIPSO_V4_TAG_MAXCNT)
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doi_def->tags[iter] = CIPSO_V4_TAG_INVALID;
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doi_def->doi = doi;
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ret_val = cipso_v4_doi_add(doi_def);
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if (ret_val != 0)
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goto add_pass_failure;
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return 0;
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add_pass_failure:
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if (doi_def)
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netlbl_cipsov4_doi_free(&doi_def->rcu);
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return ret_val;
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}
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/**
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* netlbl_cipsov4_add - Handle an ADD message
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* @skb: the NETLINK buffer
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* @info: the Generic NETLINK info block
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*
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* Description:
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* Create a new DOI definition based on the given ADD message and add it to the
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* CIPSO V4 engine. Returns zero on success, negative values on failure.
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*
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*/
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static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
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{
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int ret_val = -EINVAL;
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u32 doi;
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u32 map_type;
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int msg_len = netlbl_netlink_payload_len(skb);
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struct nlattr *msg = netlbl_netlink_payload_data(skb);
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ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
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if (ret_val != 0)
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goto add_return;
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if (msg_len < 2 * NETLBL_LEN_U32)
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goto add_return;
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doi = netlbl_getinc_u32(&msg, &msg_len);
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map_type = netlbl_getinc_u32(&msg, &msg_len);
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switch (map_type) {
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case CIPSO_V4_MAP_STD:
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ret_val = netlbl_cipsov4_add_std(doi, msg, msg_len);
|
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break;
|
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case CIPSO_V4_MAP_PASS:
|
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ret_val = netlbl_cipsov4_add_pass(doi, msg, msg_len);
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break;
|
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}
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add_return:
|
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netlbl_netlink_send_ack(info,
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netlbl_cipsov4_gnl_family.id,
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NLBL_CIPSOV4_C_ACK,
|
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-ret_val);
|
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return ret_val;
|
||||
}
|
||||
|
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/**
|
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* netlbl_cipsov4_list - Handle a LIST message
|
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* @skb: the NETLINK buffer
|
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* @info: the Generic NETLINK info block
|
||||
*
|
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* Description:
|
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* Process a user generated LIST message and respond accordingly. Returns
|
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* zero on success and negative values on error.
|
||||
*
|
||||
*/
|
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static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info)
|
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{
|
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int ret_val = -EINVAL;
|
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u32 doi;
|
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struct nlattr *msg = netlbl_netlink_payload_data(skb);
|
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struct sk_buff *ans_skb;
|
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|
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if (netlbl_netlink_payload_len(skb) != NETLBL_LEN_U32)
|
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goto list_failure;
|
||||
|
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doi = nla_get_u32(msg);
|
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ans_skb = cipso_v4_doi_dump(doi, NLMSG_SPACE(GENL_HDRLEN));
|
||||
if (ans_skb == NULL) {
|
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ret_val = -ENOMEM;
|
||||
goto list_failure;
|
||||
}
|
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netlbl_netlink_hdr_push(ans_skb,
|
||||
info->snd_pid,
|
||||
0,
|
||||
netlbl_cipsov4_gnl_family.id,
|
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NLBL_CIPSOV4_C_LIST);
|
||||
|
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ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
|
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if (ret_val != 0)
|
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goto list_failure;
|
||||
|
||||
return 0;
|
||||
|
||||
list_failure:
|
||||
netlbl_netlink_send_ack(info,
|
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netlbl_cipsov4_gnl_family.id,
|
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NLBL_CIPSOV4_C_ACK,
|
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-ret_val);
|
||||
return ret_val;
|
||||
}
|
||||
|
||||
/**
|
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* netlbl_cipsov4_listall - Handle a LISTALL message
|
||||
* @skb: the NETLINK buffer
|
||||
* @info: the Generic NETLINK info block
|
||||
*
|
||||
* Description:
|
||||
* Process a user generated LISTALL message and respond accordingly. Returns
|
||||
* zero on success and negative values on error.
|
||||
*
|
||||
*/
|
||||
static int netlbl_cipsov4_listall(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
int ret_val = -EINVAL;
|
||||
struct sk_buff *ans_skb;
|
||||
|
||||
ans_skb = cipso_v4_doi_dump_all(NLMSG_SPACE(GENL_HDRLEN));
|
||||
if (ans_skb == NULL) {
|
||||
ret_val = -ENOMEM;
|
||||
goto listall_failure;
|
||||
}
|
||||
netlbl_netlink_hdr_push(ans_skb,
|
||||
info->snd_pid,
|
||||
0,
|
||||
netlbl_cipsov4_gnl_family.id,
|
||||
NLBL_CIPSOV4_C_LISTALL);
|
||||
|
||||
ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
|
||||
if (ret_val != 0)
|
||||
goto listall_failure;
|
||||
|
||||
return 0;
|
||||
|
||||
listall_failure:
|
||||
netlbl_netlink_send_ack(info,
|
||||
netlbl_cipsov4_gnl_family.id,
|
||||
NLBL_CIPSOV4_C_ACK,
|
||||
-ret_val);
|
||||
return ret_val;
|
||||
}
|
||||
|
||||
/**
|
||||
* netlbl_cipsov4_remove - Handle a REMOVE message
|
||||
* @skb: the NETLINK buffer
|
||||
* @info: the Generic NETLINK info block
|
||||
*
|
||||
* Description:
|
||||
* Process a user generated REMOVE message and respond accordingly. Returns
|
||||
* zero on success, negative values on failure.
|
||||
*
|
||||
*/
|
||||
static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
int ret_val;
|
||||
u32 doi;
|
||||
struct nlattr *msg = netlbl_netlink_payload_data(skb);
|
||||
|
||||
ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
|
||||
if (ret_val != 0)
|
||||
goto remove_return;
|
||||
|
||||
if (netlbl_netlink_payload_len(skb) != NETLBL_LEN_U32) {
|
||||
ret_val = -EINVAL;
|
||||
goto remove_return;
|
||||
}
|
||||
|
||||
doi = nla_get_u32(msg);
|
||||
ret_val = cipso_v4_doi_remove(doi, netlbl_cipsov4_doi_free);
|
||||
|
||||
remove_return:
|
||||
netlbl_netlink_send_ack(info,
|
||||
netlbl_cipsov4_gnl_family.id,
|
||||
NLBL_CIPSOV4_C_ACK,
|
||||
-ret_val);
|
||||
return ret_val;
|
||||
}
|
||||
|
||||
/*
|
||||
* NetLabel Generic NETLINK Command Definitions
|
||||
*/
|
||||
|
||||
static struct genl_ops netlbl_cipsov4_genl_c_add = {
|
||||
.cmd = NLBL_CIPSOV4_C_ADD,
|
||||
.flags = 0,
|
||||
.doit = netlbl_cipsov4_add,
|
||||
.dumpit = NULL,
|
||||
};
|
||||
|
||||
static struct genl_ops netlbl_cipsov4_genl_c_remove = {
|
||||
.cmd = NLBL_CIPSOV4_C_REMOVE,
|
||||
.flags = 0,
|
||||
.doit = netlbl_cipsov4_remove,
|
||||
.dumpit = NULL,
|
||||
};
|
||||
|
||||
static struct genl_ops netlbl_cipsov4_genl_c_list = {
|
||||
.cmd = NLBL_CIPSOV4_C_LIST,
|
||||
.flags = 0,
|
||||
.doit = netlbl_cipsov4_list,
|
||||
.dumpit = NULL,
|
||||
};
|
||||
|
||||
static struct genl_ops netlbl_cipsov4_genl_c_listall = {
|
||||
.cmd = NLBL_CIPSOV4_C_LISTALL,
|
||||
.flags = 0,
|
||||
.doit = netlbl_cipsov4_listall,
|
||||
.dumpit = NULL,
|
||||
};
|
||||
|
||||
/*
|
||||
* NetLabel Generic NETLINK Protocol Functions
|
||||
*/
|
||||
|
||||
/**
|
||||
* netlbl_cipsov4_genl_init - Register the CIPSOv4 NetLabel component
|
||||
*
|
||||
* Description:
|
||||
* Register the CIPSOv4 packet NetLabel component with the Generic NETLINK
|
||||
* mechanism. Returns zero on success, negative values on failure.
|
||||
*
|
||||
*/
|
||||
int netlbl_cipsov4_genl_init(void)
|
||||
{
|
||||
int ret_val;
|
||||
|
||||
ret_val = genl_register_family(&netlbl_cipsov4_gnl_family);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
|
||||
&netlbl_cipsov4_genl_c_add);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
|
||||
&netlbl_cipsov4_genl_c_remove);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
|
||||
&netlbl_cipsov4_genl_c_list);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
|
||||
&netlbl_cipsov4_genl_c_listall);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,253 @@
|
|||
/*
|
||||
* NetLabel Unlabeled Support
|
||||
*
|
||||
* This file defines functions for dealing with unlabeled packets 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/types.h>
|
||||
#include <linux/rcupdate.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/socket.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/skbuff.h>
|
||||
#include <net/sock.h>
|
||||
#include <net/netlink.h>
|
||||
#include <net/genetlink.h>
|
||||
|
||||
#include <net/netlabel.h>
|
||||
#include <asm/bug.h>
|
||||
|
||||
#include "netlabel_user.h"
|
||||
#include "netlabel_domainhash.h"
|
||||
#include "netlabel_unlabeled.h"
|
||||
|
||||
/* Accept unlabeled packets flag */
|
||||
static atomic_t netlabel_unlabel_accept_flg = ATOMIC_INIT(0);
|
||||
|
||||
/* NetLabel Generic NETLINK CIPSOv4 family */
|
||||
static struct genl_family netlbl_unlabel_gnl_family = {
|
||||
.id = GENL_ID_GENERATE,
|
||||
.hdrsize = 0,
|
||||
.name = NETLBL_NLTYPE_UNLABELED_NAME,
|
||||
.version = NETLBL_PROTO_VERSION,
|
||||
.maxattr = 0,
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* NetLabel Command Handlers
|
||||
*/
|
||||
|
||||
/**
|
||||
* netlbl_unlabel_accept - Handle an ACCEPT message
|
||||
* @skb: the NETLINK buffer
|
||||
* @info: the Generic NETLINK info block
|
||||
*
|
||||
* Description:
|
||||
* Process a user generated ACCEPT message and set the accept flag accordingly.
|
||||
* Returns zero on success, negative values on failure.
|
||||
*
|
||||
*/
|
||||
static int netlbl_unlabel_accept(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
int ret_val;
|
||||
struct nlattr *data = netlbl_netlink_payload_data(skb);
|
||||
u32 value;
|
||||
|
||||
ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
if (netlbl_netlink_payload_len(skb) == NETLBL_LEN_U32) {
|
||||
value = nla_get_u32(data);
|
||||
if (value == 1 || value == 0) {
|
||||
atomic_set(&netlabel_unlabel_accept_flg, value);
|
||||
netlbl_netlink_send_ack(info,
|
||||
netlbl_unlabel_gnl_family.id,
|
||||
NLBL_UNLABEL_C_ACK,
|
||||
NETLBL_E_OK);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
netlbl_netlink_send_ack(info,
|
||||
netlbl_unlabel_gnl_family.id,
|
||||
NLBL_UNLABEL_C_ACK,
|
||||
EINVAL);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/**
|
||||
* netlbl_unlabel_list - Handle a LIST message
|
||||
* @skb: the NETLINK buffer
|
||||
* @info: the Generic NETLINK info block
|
||||
*
|
||||
* Description:
|
||||
* Process a user generated LIST message and respond with the current status.
|
||||
* Returns zero on success, negative values on failure.
|
||||
*
|
||||
*/
|
||||
static int netlbl_unlabel_list(struct sk_buff *skb, struct genl_info *info)
|
||||
{
|
||||
int ret_val = -ENOMEM;
|
||||
struct sk_buff *ans_skb;
|
||||
|
||||
ans_skb = netlbl_netlink_alloc_skb(0,
|
||||
GENL_HDRLEN + NETLBL_LEN_U32,
|
||||
GFP_KERNEL);
|
||||
if (ans_skb == NULL)
|
||||
goto list_failure;
|
||||
|
||||
if (netlbl_netlink_hdr_put(ans_skb,
|
||||
info->snd_pid,
|
||||
0,
|
||||
netlbl_unlabel_gnl_family.id,
|
||||
NLBL_UNLABEL_C_LIST) == NULL)
|
||||
goto list_failure;
|
||||
|
||||
ret_val = nla_put_u32(ans_skb,
|
||||
NLA_U32,
|
||||
atomic_read(&netlabel_unlabel_accept_flg));
|
||||
if (ret_val != 0)
|
||||
goto list_failure;
|
||||
|
||||
ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
|
||||
if (ret_val != 0)
|
||||
goto list_failure;
|
||||
|
||||
return 0;
|
||||
|
||||
list_failure:
|
||||
netlbl_netlink_send_ack(info,
|
||||
netlbl_unlabel_gnl_family.id,
|
||||
NLBL_UNLABEL_C_ACK,
|
||||
-ret_val);
|
||||
return ret_val;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* NetLabel Generic NETLINK Command Definitions
|
||||
*/
|
||||
|
||||
static struct genl_ops netlbl_unlabel_genl_c_accept = {
|
||||
.cmd = NLBL_UNLABEL_C_ACCEPT,
|
||||
.flags = 0,
|
||||
.doit = netlbl_unlabel_accept,
|
||||
.dumpit = NULL,
|
||||
};
|
||||
|
||||
static struct genl_ops netlbl_unlabel_genl_c_list = {
|
||||
.cmd = NLBL_UNLABEL_C_LIST,
|
||||
.flags = 0,
|
||||
.doit = netlbl_unlabel_list,
|
||||
.dumpit = NULL,
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* NetLabel Generic NETLINK Protocol Functions
|
||||
*/
|
||||
|
||||
/**
|
||||
* netlbl_unlabel_genl_init - Register the Unlabeled NetLabel component
|
||||
*
|
||||
* Description:
|
||||
* Register the unlabeled packet NetLabel component with the Generic NETLINK
|
||||
* mechanism. Returns zero on success, negative values on failure.
|
||||
*
|
||||
*/
|
||||
int netlbl_unlabel_genl_init(void)
|
||||
{
|
||||
int ret_val;
|
||||
|
||||
ret_val = genl_register_family(&netlbl_unlabel_gnl_family);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
ret_val = genl_register_ops(&netlbl_unlabel_gnl_family,
|
||||
&netlbl_unlabel_genl_c_accept);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
ret_val = genl_register_ops(&netlbl_unlabel_gnl_family,
|
||||
&netlbl_unlabel_genl_c_list);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* NetLabel KAPI Hooks
|
||||
*/
|
||||
|
||||
/**
|
||||
* netlbl_unlabel_getattr - Get the security attributes for an unlabled packet
|
||||
* @secattr: the security attributes
|
||||
*
|
||||
* Description:
|
||||
* Determine the security attributes, if any, for an unlabled packet and return
|
||||
* them in @secattr. Returns zero on success and negative values on failure.
|
||||
*
|
||||
*/
|
||||
int netlbl_unlabel_getattr(struct netlbl_lsm_secattr *secattr)
|
||||
{
|
||||
if (atomic_read(&netlabel_unlabel_accept_flg) == 1) {
|
||||
memset(secattr, 0, sizeof(*secattr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -ENOMSG;
|
||||
}
|
||||
|
||||
/**
|
||||
* netlbl_unlabel_defconf - Set the default config to allow unlabeled packets
|
||||
*
|
||||
* Description:
|
||||
* Set the default NetLabel configuration to allow incoming unlabeled packets
|
||||
* and to send unlabeled network traffic by default.
|
||||
*
|
||||
*/
|
||||
int netlbl_unlabel_defconf(void)
|
||||
{
|
||||
int ret_val;
|
||||
struct netlbl_dom_map *entry;
|
||||
|
||||
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
|
||||
if (entry == NULL)
|
||||
return -ENOMEM;
|
||||
entry->type = NETLBL_NLTYPE_UNLABELED;
|
||||
ret_val = netlbl_domhsh_add_default(entry);
|
||||
if (ret_val != 0)
|
||||
return ret_val;
|
||||
|
||||
atomic_set(&netlabel_unlabel_accept_flg, 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue