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![Jiri Benc](/assets/img/avatar_default.png)
IP addresses are often stored in netlink attributes. Add generic functions to do that. For nla_put_in_addr, it would be nicer to pass struct in_addr but this is not used universally throughout the kernel, in way too many places __be32 is used to store IPv4 address. Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
778 lines
20 KiB
C
778 lines
20 KiB
C
/*
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* NetLabel Management Support
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*
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* This file defines the management 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@paul-moore.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, 2008
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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, see <http://www.gnu.org/licenses/>.
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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 <linux/in.h>
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#include <linux/in6.h>
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#include <linux/slab.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/ip.h>
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#include <net/ipv6.h>
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#include <net/netlabel.h>
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#include <net/cipso_ipv4.h>
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#include <linux/atomic.h>
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#include "netlabel_domainhash.h"
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#include "netlabel_user.h"
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#include "netlabel_mgmt.h"
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/* NetLabel configured protocol counter */
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atomic_t netlabel_mgmt_protocount = ATOMIC_INIT(0);
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/* Argument struct for netlbl_domhsh_walk() */
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struct netlbl_domhsh_walk_arg {
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struct netlink_callback *nl_cb;
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struct sk_buff *skb;
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u32 seq;
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};
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/* NetLabel Generic NETLINK CIPSOv4 family */
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static struct genl_family netlbl_mgmt_gnl_family = {
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.id = GENL_ID_GENERATE,
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.hdrsize = 0,
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.name = NETLBL_NLTYPE_MGMT_NAME,
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.version = NETLBL_PROTO_VERSION,
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.maxattr = NLBL_MGMT_A_MAX,
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};
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/* NetLabel Netlink attribute policy */
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static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
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[NLBL_MGMT_A_DOMAIN] = { .type = NLA_NUL_STRING },
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[NLBL_MGMT_A_PROTOCOL] = { .type = NLA_U32 },
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[NLBL_MGMT_A_VERSION] = { .type = NLA_U32 },
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[NLBL_MGMT_A_CV4DOI] = { .type = NLA_U32 },
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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_mgmt_add - Handle an ADD message
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* @info: the Generic NETLINK info block
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* @audit_info: NetLabel audit information
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*
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* Description:
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* Helper function for the ADD and ADDDEF messages to add the domain mappings
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* from the message to the hash table. See netlabel.h for a description of the
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* message format. Returns zero on success, negative values on failure.
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*
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*/
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static int netlbl_mgmt_add_common(struct genl_info *info,
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struct netlbl_audit *audit_info)
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{
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int ret_val = -EINVAL;
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struct netlbl_domaddr_map *addrmap = NULL;
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struct cipso_v4_doi *cipsov4 = NULL;
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u32 tmp_val;
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struct netlbl_dom_map *entry = kzalloc(sizeof(*entry), GFP_KERNEL);
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if (!entry)
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return -ENOMEM;
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entry->def.type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
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if (info->attrs[NLBL_MGMT_A_DOMAIN]) {
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size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
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entry->domain = kmalloc(tmp_size, GFP_KERNEL);
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if (entry->domain == NULL) {
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ret_val = -ENOMEM;
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goto add_free_entry;
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}
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nla_strlcpy(entry->domain,
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info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
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}
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/* NOTE: internally we allow/use a entry->def.type value of
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* NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users
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* to pass that as a protocol value because we need to know the
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* "real" protocol */
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switch (entry->def.type) {
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case NETLBL_NLTYPE_UNLABELED:
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break;
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case NETLBL_NLTYPE_CIPSOV4:
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if (!info->attrs[NLBL_MGMT_A_CV4DOI])
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goto add_free_domain;
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tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
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cipsov4 = cipso_v4_doi_getdef(tmp_val);
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if (cipsov4 == NULL)
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goto add_free_domain;
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entry->def.cipso = cipsov4;
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break;
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default:
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goto add_free_domain;
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}
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if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) {
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struct in_addr *addr;
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struct in_addr *mask;
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struct netlbl_domaddr4_map *map;
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addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
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if (addrmap == NULL) {
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ret_val = -ENOMEM;
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goto add_doi_put_def;
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}
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INIT_LIST_HEAD(&addrmap->list4);
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INIT_LIST_HEAD(&addrmap->list6);
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if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) !=
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sizeof(struct in_addr)) {
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ret_val = -EINVAL;
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goto add_free_addrmap;
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}
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if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) !=
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sizeof(struct in_addr)) {
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ret_val = -EINVAL;
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goto add_free_addrmap;
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}
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addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]);
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mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]);
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map = kzalloc(sizeof(*map), GFP_KERNEL);
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if (map == NULL) {
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ret_val = -ENOMEM;
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goto add_free_addrmap;
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}
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map->list.addr = addr->s_addr & mask->s_addr;
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map->list.mask = mask->s_addr;
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map->list.valid = 1;
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map->def.type = entry->def.type;
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if (cipsov4)
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map->def.cipso = cipsov4;
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ret_val = netlbl_af4list_add(&map->list, &addrmap->list4);
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if (ret_val != 0) {
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kfree(map);
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goto add_free_addrmap;
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}
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entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
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entry->def.addrsel = addrmap;
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#if IS_ENABLED(CONFIG_IPV6)
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} else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) {
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struct in6_addr *addr;
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struct in6_addr *mask;
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struct netlbl_domaddr6_map *map;
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addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
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if (addrmap == NULL) {
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ret_val = -ENOMEM;
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goto add_doi_put_def;
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}
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INIT_LIST_HEAD(&addrmap->list4);
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INIT_LIST_HEAD(&addrmap->list6);
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if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) !=
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sizeof(struct in6_addr)) {
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ret_val = -EINVAL;
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goto add_free_addrmap;
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}
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if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) !=
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sizeof(struct in6_addr)) {
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ret_val = -EINVAL;
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goto add_free_addrmap;
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}
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addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]);
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mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]);
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map = kzalloc(sizeof(*map), GFP_KERNEL);
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if (map == NULL) {
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ret_val = -ENOMEM;
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goto add_free_addrmap;
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}
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map->list.addr = *addr;
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map->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
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map->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
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map->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
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map->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
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map->list.mask = *mask;
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map->list.valid = 1;
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map->def.type = entry->def.type;
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ret_val = netlbl_af6list_add(&map->list, &addrmap->list6);
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if (ret_val != 0) {
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kfree(map);
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goto add_free_addrmap;
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}
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entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
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entry->def.addrsel = addrmap;
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#endif /* IPv6 */
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}
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ret_val = netlbl_domhsh_add(entry, audit_info);
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if (ret_val != 0)
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goto add_free_addrmap;
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return 0;
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add_free_addrmap:
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kfree(addrmap);
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add_doi_put_def:
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cipso_v4_doi_putdef(cipsov4);
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add_free_domain:
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kfree(entry->domain);
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add_free_entry:
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kfree(entry);
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return ret_val;
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}
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/**
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* netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry
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* @skb: the NETLINK buffer
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* @entry: the map entry
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*
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* Description:
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* This function is a helper function used by the LISTALL and LISTDEF command
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* handlers. The caller is responsible for ensuring that the RCU read lock
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* is held. Returns zero on success, negative values on failure.
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*
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*/
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static int netlbl_mgmt_listentry(struct sk_buff *skb,
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struct netlbl_dom_map *entry)
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{
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int ret_val = 0;
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struct nlattr *nla_a;
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struct nlattr *nla_b;
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struct netlbl_af4list *iter4;
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#if IS_ENABLED(CONFIG_IPV6)
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struct netlbl_af6list *iter6;
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#endif
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if (entry->domain != NULL) {
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ret_val = nla_put_string(skb,
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NLBL_MGMT_A_DOMAIN, entry->domain);
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if (ret_val != 0)
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return ret_val;
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}
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switch (entry->def.type) {
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case NETLBL_NLTYPE_ADDRSELECT:
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nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST);
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if (nla_a == NULL)
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return -ENOMEM;
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netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) {
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struct netlbl_domaddr4_map *map4;
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struct in_addr addr_struct;
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nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
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if (nla_b == NULL)
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return -ENOMEM;
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addr_struct.s_addr = iter4->addr;
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ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4ADDR,
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addr_struct.s_addr);
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if (ret_val != 0)
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return ret_val;
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addr_struct.s_addr = iter4->mask;
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ret_val = nla_put_in_addr(skb, NLBL_MGMT_A_IPV4MASK,
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addr_struct.s_addr);
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if (ret_val != 0)
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return ret_val;
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map4 = netlbl_domhsh_addr4_entry(iter4);
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ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
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map4->def.type);
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if (ret_val != 0)
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return ret_val;
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switch (map4->def.type) {
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case NETLBL_NLTYPE_CIPSOV4:
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ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
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map4->def.cipso->doi);
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if (ret_val != 0)
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return ret_val;
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break;
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}
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nla_nest_end(skb, nla_b);
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}
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#if IS_ENABLED(CONFIG_IPV6)
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netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) {
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struct netlbl_domaddr6_map *map6;
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nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
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if (nla_b == NULL)
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return -ENOMEM;
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ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6ADDR,
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&iter6->addr);
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if (ret_val != 0)
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return ret_val;
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ret_val = nla_put_in6_addr(skb, NLBL_MGMT_A_IPV6MASK,
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&iter6->mask);
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if (ret_val != 0)
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return ret_val;
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map6 = netlbl_domhsh_addr6_entry(iter6);
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ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
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map6->def.type);
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if (ret_val != 0)
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return ret_val;
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nla_nest_end(skb, nla_b);
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}
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#endif /* IPv6 */
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nla_nest_end(skb, nla_a);
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break;
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case NETLBL_NLTYPE_UNLABELED:
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ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type);
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break;
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case NETLBL_NLTYPE_CIPSOV4:
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ret_val = nla_put_u32(skb,NLBL_MGMT_A_PROTOCOL,entry->def.type);
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if (ret_val != 0)
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return ret_val;
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ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
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entry->def.cipso->doi);
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break;
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}
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return ret_val;
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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_mgmt_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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* Process a user generated ADD message and add the domains from the message
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* to the hash table. See netlabel.h for a description of the message format.
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* Returns zero on success, negative values on failure.
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*
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*/
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static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
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{
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struct netlbl_audit audit_info;
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if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) ||
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(!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
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(info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
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info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
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(info->attrs[NLBL_MGMT_A_IPV4MASK] &&
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info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
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((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
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(info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
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((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
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(info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
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return -EINVAL;
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netlbl_netlink_auditinfo(skb, &audit_info);
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return netlbl_mgmt_add_common(info, &audit_info);
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}
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/**
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* netlbl_mgmt_remove - Handle a REMOVE 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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* Process a user generated REMOVE message and remove the specified domain
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* mappings. Returns zero on success, negative values on failure.
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*
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*/
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static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info)
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{
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char *domain;
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struct netlbl_audit audit_info;
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if (!info->attrs[NLBL_MGMT_A_DOMAIN])
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return -EINVAL;
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netlbl_netlink_auditinfo(skb, &audit_info);
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domain = nla_data(info->attrs[NLBL_MGMT_A_DOMAIN]);
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return netlbl_domhsh_remove(domain, &audit_info);
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}
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/**
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* netlbl_mgmt_listall_cb - netlbl_domhsh_walk() callback for LISTALL
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* @entry: the domain mapping hash table entry
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* @arg: the netlbl_domhsh_walk_arg structure
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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
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* netlbl_domhsh_walk() function for use in generating a response for a LISTALL
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* message. Returns the size of the message on success, negative values on
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* failure.
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*
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*/
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static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
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{
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int ret_val = -ENOMEM;
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struct netlbl_domhsh_walk_arg *cb_arg = arg;
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void *data;
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data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid,
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cb_arg->seq, &netlbl_mgmt_gnl_family,
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NLM_F_MULTI, NLBL_MGMT_C_LISTALL);
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if (data == NULL)
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goto listall_cb_failure;
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ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry);
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if (ret_val != 0)
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goto listall_cb_failure;
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cb_arg->seq++;
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genlmsg_end(cb_arg->skb, data);
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return 0;
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listall_cb_failure:
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genlmsg_cancel(cb_arg->skb, data);
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return ret_val;
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}
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/**
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* netlbl_mgmt_listall - Handle a LISTALL message
|
|
* @skb: the NETLINK buffer
|
|
* @cb: the NETLINK callback
|
|
*
|
|
* Description:
|
|
* Process a user generated LISTALL message and dumps the domain hash table in
|
|
* a form suitable for use in a kernel generated LISTALL message. Returns zero
|
|
* on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_listall(struct sk_buff *skb,
|
|
struct netlink_callback *cb)
|
|
{
|
|
struct netlbl_domhsh_walk_arg cb_arg;
|
|
u32 skip_bkt = cb->args[0];
|
|
u32 skip_chain = cb->args[1];
|
|
|
|
cb_arg.nl_cb = cb;
|
|
cb_arg.skb = skb;
|
|
cb_arg.seq = cb->nlh->nlmsg_seq;
|
|
|
|
netlbl_domhsh_walk(&skip_bkt,
|
|
&skip_chain,
|
|
netlbl_mgmt_listall_cb,
|
|
&cb_arg);
|
|
|
|
cb->args[0] = skip_bkt;
|
|
cb->args[1] = skip_chain;
|
|
return skb->len;
|
|
}
|
|
|
|
/**
|
|
* netlbl_mgmt_adddef - Handle an ADDDEF message
|
|
* @skb: the NETLINK buffer
|
|
* @info: the Generic NETLINK info block
|
|
*
|
|
* Description:
|
|
* Process a user generated ADDDEF message and respond accordingly. Returns
|
|
* zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct netlbl_audit audit_info;
|
|
|
|
if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
|
|
(info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
|
|
info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
|
|
(info->attrs[NLBL_MGMT_A_IPV4MASK] &&
|
|
info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
|
|
((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
|
|
(info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
|
|
((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
|
|
(info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
|
|
return -EINVAL;
|
|
|
|
netlbl_netlink_auditinfo(skb, &audit_info);
|
|
|
|
return netlbl_mgmt_add_common(info, &audit_info);
|
|
}
|
|
|
|
/**
|
|
* netlbl_mgmt_removedef - Handle a REMOVEDEF message
|
|
* @skb: the NETLINK buffer
|
|
* @info: the Generic NETLINK info block
|
|
*
|
|
* Description:
|
|
* Process a user generated REMOVEDEF message and remove the default domain
|
|
* mapping. Returns zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_removedef(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct netlbl_audit audit_info;
|
|
|
|
netlbl_netlink_auditinfo(skb, &audit_info);
|
|
|
|
return netlbl_domhsh_remove_default(&audit_info);
|
|
}
|
|
|
|
/**
|
|
* netlbl_mgmt_listdef - Handle a LISTDEF message
|
|
* @skb: the NETLINK buffer
|
|
* @info: the Generic NETLINK info block
|
|
*
|
|
* Description:
|
|
* Process a user generated LISTDEF message and dumps the default domain
|
|
* mapping in a form suitable for use in a kernel generated LISTDEF message.
|
|
* Returns zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int ret_val = -ENOMEM;
|
|
struct sk_buff *ans_skb = NULL;
|
|
void *data;
|
|
struct netlbl_dom_map *entry;
|
|
|
|
ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
if (ans_skb == NULL)
|
|
return -ENOMEM;
|
|
data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
|
|
0, NLBL_MGMT_C_LISTDEF);
|
|
if (data == NULL)
|
|
goto listdef_failure;
|
|
|
|
rcu_read_lock();
|
|
entry = netlbl_domhsh_getentry(NULL);
|
|
if (entry == NULL) {
|
|
ret_val = -ENOENT;
|
|
goto listdef_failure_lock;
|
|
}
|
|
ret_val = netlbl_mgmt_listentry(ans_skb, entry);
|
|
rcu_read_unlock();
|
|
if (ret_val != 0)
|
|
goto listdef_failure;
|
|
|
|
genlmsg_end(ans_skb, data);
|
|
return genlmsg_reply(ans_skb, info);
|
|
|
|
listdef_failure_lock:
|
|
rcu_read_unlock();
|
|
listdef_failure:
|
|
kfree_skb(ans_skb);
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* netlbl_mgmt_protocols_cb - Write an individual PROTOCOL message response
|
|
* @skb: the skb to write to
|
|
* @cb: the NETLINK callback
|
|
* @protocol: the NetLabel protocol to use in the message
|
|
*
|
|
* Description:
|
|
* This function is to be used in conjunction with netlbl_mgmt_protocols() to
|
|
* answer a application's PROTOCOLS message. Returns the size of the message
|
|
* on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_protocols_cb(struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
u32 protocol)
|
|
{
|
|
int ret_val = -ENOMEM;
|
|
void *data;
|
|
|
|
data = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
|
|
&netlbl_mgmt_gnl_family, NLM_F_MULTI,
|
|
NLBL_MGMT_C_PROTOCOLS);
|
|
if (data == NULL)
|
|
goto protocols_cb_failure;
|
|
|
|
ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, protocol);
|
|
if (ret_val != 0)
|
|
goto protocols_cb_failure;
|
|
|
|
genlmsg_end(skb, data);
|
|
return 0;
|
|
|
|
protocols_cb_failure:
|
|
genlmsg_cancel(skb, data);
|
|
return ret_val;
|
|
}
|
|
|
|
/**
|
|
* netlbl_mgmt_protocols - Handle a PROTOCOLS message
|
|
* @skb: the NETLINK buffer
|
|
* @cb: the NETLINK callback
|
|
*
|
|
* Description:
|
|
* Process a user generated PROTOCOLS message and respond accordingly.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_protocols(struct sk_buff *skb,
|
|
struct netlink_callback *cb)
|
|
{
|
|
u32 protos_sent = cb->args[0];
|
|
|
|
if (protos_sent == 0) {
|
|
if (netlbl_mgmt_protocols_cb(skb,
|
|
cb,
|
|
NETLBL_NLTYPE_UNLABELED) < 0)
|
|
goto protocols_return;
|
|
protos_sent++;
|
|
}
|
|
if (protos_sent == 1) {
|
|
if (netlbl_mgmt_protocols_cb(skb,
|
|
cb,
|
|
NETLBL_NLTYPE_CIPSOV4) < 0)
|
|
goto protocols_return;
|
|
protos_sent++;
|
|
}
|
|
|
|
protocols_return:
|
|
cb->args[0] = protos_sent;
|
|
return skb->len;
|
|
}
|
|
|
|
/**
|
|
* netlbl_mgmt_version - Handle a VERSION message
|
|
* @skb: the NETLINK buffer
|
|
* @info: the Generic NETLINK info block
|
|
*
|
|
* Description:
|
|
* Process a user generated VERSION message and respond accordingly. Returns
|
|
* zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
static int netlbl_mgmt_version(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int ret_val = -ENOMEM;
|
|
struct sk_buff *ans_skb = NULL;
|
|
void *data;
|
|
|
|
ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
if (ans_skb == NULL)
|
|
return -ENOMEM;
|
|
data = genlmsg_put_reply(ans_skb, info, &netlbl_mgmt_gnl_family,
|
|
0, NLBL_MGMT_C_VERSION);
|
|
if (data == NULL)
|
|
goto version_failure;
|
|
|
|
ret_val = nla_put_u32(ans_skb,
|
|
NLBL_MGMT_A_VERSION,
|
|
NETLBL_PROTO_VERSION);
|
|
if (ret_val != 0)
|
|
goto version_failure;
|
|
|
|
genlmsg_end(ans_skb, data);
|
|
return genlmsg_reply(ans_skb, info);
|
|
|
|
version_failure:
|
|
kfree_skb(ans_skb);
|
|
return ret_val;
|
|
}
|
|
|
|
|
|
/*
|
|
* NetLabel Generic NETLINK Command Definitions
|
|
*/
|
|
|
|
static const struct genl_ops netlbl_mgmt_genl_ops[] = {
|
|
{
|
|
.cmd = NLBL_MGMT_C_ADD,
|
|
.flags = GENL_ADMIN_PERM,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = netlbl_mgmt_add,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_REMOVE,
|
|
.flags = GENL_ADMIN_PERM,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = netlbl_mgmt_remove,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_LISTALL,
|
|
.flags = 0,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = NULL,
|
|
.dumpit = netlbl_mgmt_listall,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_ADDDEF,
|
|
.flags = GENL_ADMIN_PERM,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = netlbl_mgmt_adddef,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_REMOVEDEF,
|
|
.flags = GENL_ADMIN_PERM,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = netlbl_mgmt_removedef,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_LISTDEF,
|
|
.flags = 0,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = netlbl_mgmt_listdef,
|
|
.dumpit = NULL,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_PROTOCOLS,
|
|
.flags = 0,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = NULL,
|
|
.dumpit = netlbl_mgmt_protocols,
|
|
},
|
|
{
|
|
.cmd = NLBL_MGMT_C_VERSION,
|
|
.flags = 0,
|
|
.policy = netlbl_mgmt_genl_policy,
|
|
.doit = netlbl_mgmt_version,
|
|
.dumpit = NULL,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* NetLabel Generic NETLINK Protocol Functions
|
|
*/
|
|
|
|
/**
|
|
* netlbl_mgmt_genl_init - Register the NetLabel management component
|
|
*
|
|
* Description:
|
|
* Register the NetLabel management component with the Generic NETLINK
|
|
* mechanism. Returns zero on success, negative values on failure.
|
|
*
|
|
*/
|
|
int __init netlbl_mgmt_genl_init(void)
|
|
{
|
|
return genl_register_family_with_ops(&netlbl_mgmt_gnl_family,
|
|
netlbl_mgmt_genl_ops);
|
|
}
|