*/
/*
- * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
*
* 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
#include <linux/init.h>
#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/audit.h>
+#include <linux/in.h>
+#include <linux/in6.h>
#include <net/ip.h>
+#include <net/ipv6.h>
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <asm/bug.h>
+#include <asm/atomic.h>
#include "netlabel_domainhash.h"
#include "netlabel_unlabeled.h"
+#include "netlabel_cipso_v4.h"
#include "netlabel_user.h"
+#include "netlabel_mgmt.h"
+#include "netlabel_addrlist.h"
+
+/*
+ * Configuration Functions
+ */
+
+/**
+ * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
+ * @domain: the domain mapping to remove
+ * @family: address family
+ * @addr: IP address
+ * @mask: IP address mask
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the
+ * default domain mapping to be removed. Returns zero on success, negative
+ * values on failure.
+ *
+ */
+int netlbl_cfg_map_del(const char *domain,
+ u16 family,
+ const void *addr,
+ const void *mask,
+ struct netlbl_audit *audit_info)
+{
+ if (addr == NULL && mask == NULL) {
+ return netlbl_domhsh_remove(domain, audit_info);
+ } else if (addr != NULL && mask != NULL) {
+ switch (family) {
+ case AF_INET:
+ return netlbl_domhsh_remove_af4(domain, addr, mask,
+ audit_info);
+ default:
+ return -EPFNOSUPPORT;
+ }
+ } else
+ return -EINVAL;
+}
+
+/**
+ * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
+ * @domain: the domain mapping to add
+ * @family: address family
+ * @addr: IP address
+ * @mask: IP address mask
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL
+ * causes a new default domain mapping to be added. Returns zero on success,
+ * negative values on failure.
+ *
+ */
+int netlbl_cfg_unlbl_map_add(const char *domain,
+ u16 family,
+ const void *addr,
+ const void *mask,
+ struct netlbl_audit *audit_info)
+{
+ int ret_val = -ENOMEM;
+ struct netlbl_dom_map *entry;
+ struct netlbl_domaddr_map *addrmap = NULL;
+ struct netlbl_domaddr4_map *map4 = NULL;
+ struct netlbl_domaddr6_map *map6 = NULL;
+ const struct in_addr *addr4, *mask4;
+ const struct in6_addr *addr6, *mask6;
+
+ entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+ if (entry == NULL)
+ return -ENOMEM;
+ if (domain != NULL) {
+ entry->domain = kstrdup(domain, GFP_ATOMIC);
+ if (entry->domain == NULL)
+ goto cfg_unlbl_map_add_failure;
+ }
+
+ if (addr == NULL && mask == NULL)
+ entry->type = NETLBL_NLTYPE_UNLABELED;
+ else if (addr != NULL && mask != NULL) {
+ addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
+ if (addrmap == NULL)
+ goto cfg_unlbl_map_add_failure;
+ INIT_LIST_HEAD(&addrmap->list4);
+ INIT_LIST_HEAD(&addrmap->list6);
+
+ switch (family) {
+ case AF_INET:
+ addr4 = addr;
+ mask4 = mask;
+ map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
+ if (map4 == NULL)
+ goto cfg_unlbl_map_add_failure;
+ map4->type = NETLBL_NLTYPE_UNLABELED;
+ map4->list.addr = addr4->s_addr & mask4->s_addr;
+ map4->list.mask = mask4->s_addr;
+ map4->list.valid = 1;
+ ret_val = netlbl_af4list_add(&map4->list,
+ &addrmap->list4);
+ if (ret_val != 0)
+ goto cfg_unlbl_map_add_failure;
+ break;
+ case AF_INET6:
+ addr6 = addr;
+ mask6 = mask;
+ map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
+ if (map6 == NULL)
+ goto cfg_unlbl_map_add_failure;
+ map6->type = NETLBL_NLTYPE_UNLABELED;
+ ipv6_addr_copy(&map6->list.addr, addr6);
+ map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
+ map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
+ map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
+ map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
+ ipv6_addr_copy(&map6->list.mask, mask6);
+ map6->list.valid = 1;
+ ret_val = netlbl_af4list_add(&map4->list,
+ &addrmap->list4);
+ if (ret_val != 0)
+ goto cfg_unlbl_map_add_failure;
+ break;
+ default:
+ goto cfg_unlbl_map_add_failure;
+ break;
+ }
+
+ entry->type_def.addrsel = addrmap;
+ entry->type = NETLBL_NLTYPE_ADDRSELECT;
+ } else {
+ ret_val = -EINVAL;
+ goto cfg_unlbl_map_add_failure;
+ }
+
+ ret_val = netlbl_domhsh_add(entry, audit_info);
+ if (ret_val != 0)
+ goto cfg_unlbl_map_add_failure;
+
+ return 0;
+
+cfg_unlbl_map_add_failure:
+ kfree(entry->domain);
+ kfree(entry);
+ kfree(addrmap);
+ kfree(map4);
+ kfree(map6);
+ return ret_val;
+}
+
+
+/**
+ * netlbl_cfg_unlbl_static_add - Adds a new static label
+ * @net: network namespace
+ * @dev_name: interface name
+ * @addr: IP address in network byte order (struct in[6]_addr)
+ * @mask: address mask in network byte order (struct in[6]_addr)
+ * @family: address family
+ * @secid: LSM secid value for the entry
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Adds a new NetLabel static label to be used when protocol provided labels
+ * are not present on incoming traffic. If @dev_name is NULL then the default
+ * interface will be used. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_unlbl_static_add(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u16 family,
+ u32 secid,
+ struct netlbl_audit *audit_info)
+{
+ u32 addr_len;
+
+ switch (family) {
+ case AF_INET:
+ addr_len = sizeof(struct in_addr);
+ break;
+ case AF_INET6:
+ addr_len = sizeof(struct in6_addr);
+ break;
+ default:
+ return -EPFNOSUPPORT;
+ }
+
+ return netlbl_unlhsh_add(net,
+ dev_name, addr, mask, addr_len,
+ secid, audit_info);
+}
+
+/**
+ * netlbl_cfg_unlbl_static_del - Removes an existing static label
+ * @net: network namespace
+ * @dev_name: interface name
+ * @addr: IP address in network byte order (struct in[6]_addr)
+ * @mask: address mask in network byte order (struct in[6]_addr)
+ * @family: address family
+ * @secid: LSM secid value for the entry
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Removes an existing NetLabel static label used when protocol provided labels
+ * are not present on incoming traffic. If @dev_name is NULL then the default
+ * interface will be used. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_unlbl_static_del(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u16 family,
+ struct netlbl_audit *audit_info)
+{
+ u32 addr_len;
+
+ switch (family) {
+ case AF_INET:
+ addr_len = sizeof(struct in_addr);
+ break;
+ case AF_INET6:
+ addr_len = sizeof(struct in6_addr);
+ break;
+ default:
+ return -EPFNOSUPPORT;
+ }
+
+ return netlbl_unlhsh_remove(net,
+ dev_name, addr, mask, addr_len,
+ audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
+ * @doi_def: CIPSO DOI definition
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
+ * success and negative values on failure.
+ *
+ */
+int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
+ struct netlbl_audit *audit_info)
+{
+ return cipso_v4_doi_add(doi_def, audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
+ * @doi: CIPSO DOI
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
+ * success and negative values on failure.
+ *
+ */
+void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
+{
+ cipso_v4_doi_remove(doi, audit_info);
+}
+
+/**
+ * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
+ * @doi: the CIPSO DOI
+ * @domain: the domain mapping to add
+ * @addr: IP address
+ * @mask: IP address mask
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
+ * subsystem. A @domain value of NULL adds a new default domain mapping.
+ * Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cfg_cipsov4_map_add(u32 doi,
+ const char *domain,
+ const struct in_addr *addr,
+ const struct in_addr *mask,
+ struct netlbl_audit *audit_info)
+{
+ int ret_val = -ENOMEM;
+ struct cipso_v4_doi *doi_def;
+ struct netlbl_dom_map *entry;
+ struct netlbl_domaddr_map *addrmap = NULL;
+ struct netlbl_domaddr4_map *addrinfo = NULL;
+
+ doi_def = cipso_v4_doi_getdef(doi);
+ if (doi_def == NULL)
+ return -ENOENT;
+
+ entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+ if (entry == NULL)
+ return -ENOMEM;
+ if (domain != NULL) {
+ entry->domain = kstrdup(domain, GFP_ATOMIC);
+ if (entry->domain == NULL)
+ goto cfg_cipsov4_map_add_failure;
+ }
+
+ if (addr == NULL && mask == NULL) {
+ entry->type_def.cipsov4 = doi_def;
+ entry->type = NETLBL_NLTYPE_CIPSOV4;
+ } else if (addr != NULL && mask != NULL) {
+ addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
+ if (addrmap == NULL)
+ goto cfg_cipsov4_map_add_failure;
+ INIT_LIST_HEAD(&addrmap->list4);
+ INIT_LIST_HEAD(&addrmap->list6);
+
+ addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
+ if (addrinfo == NULL)
+ goto cfg_cipsov4_map_add_failure;
+ addrinfo->type_def.cipsov4 = doi_def;
+ addrinfo->type = NETLBL_NLTYPE_CIPSOV4;
+ addrinfo->list.addr = addr->s_addr & mask->s_addr;
+ addrinfo->list.mask = mask->s_addr;
+ addrinfo->list.valid = 1;
+ ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
+ if (ret_val != 0)
+ goto cfg_cipsov4_map_add_failure;
+
+ entry->type_def.addrsel = addrmap;
+ entry->type = NETLBL_NLTYPE_ADDRSELECT;
+ } else {
+ ret_val = -EINVAL;
+ goto cfg_cipsov4_map_add_failure;
+ }
+
+ ret_val = netlbl_domhsh_add(entry, audit_info);
+ if (ret_val != 0)
+ goto cfg_cipsov4_map_add_failure;
+
+ return 0;
+
+cfg_cipsov4_map_add_failure:
+ cipso_v4_doi_putdef(doi_def);
+ kfree(entry->domain);
+ kfree(entry);
+ kfree(addrmap);
+ kfree(addrinfo);
+ return ret_val;
+}
/*
* Security Attribute Functions
*/
/**
- * netlbl_socket_setattr - Label a socket using the correct protocol
+ * netlbl_enabled - Determine if the NetLabel subsystem is enabled
+ *
+ * Description:
+ * The LSM can use this function to determine if it should use NetLabel
+ * security attributes in it's enforcement mechanism. Currently, NetLabel is
+ * considered to be enabled when it's configuration contains a valid setup for
+ * at least one labeled protocol (i.e. NetLabel can understand incoming
+ * labeled packets of at least one type); otherwise NetLabel is considered to
+ * be disabled.
+ *
+ */
+int netlbl_enabled(void)
+{
+ /* At some point we probably want to expose this mechanism to the user
+ * as well so that admins can toggle NetLabel regardless of the
+ * configuration */
+ return (atomic_read(&netlabel_mgmt_protocount) > 0);
+}
+
+/**
+ * netlbl_sock_setattr - Label a socket using the correct protocol
* @sk: the socket to label
+ * @family: protocol family
* @secattr: the security attributes
*
* Description:
* Attach the correct label to the given socket using the security attributes
* specified in @secattr. This function requires exclusive access to @sk,
* which means it either needs to be in the process of being created or locked.
- * Returns zero on success, negative values on failure.
+ * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
+ * network address selectors (can't blindly label the socket), and negative
+ * values on all other failures.
*
*/
int netlbl_sock_setattr(struct sock *sk,
+ u16 family,
const struct netlbl_lsm_secattr *secattr)
{
- int ret_val = -ENOENT;
+ int ret_val;
struct netlbl_dom_map *dom_entry;
rcu_read_lock();
dom_entry = netlbl_domhsh_getentry(secattr->domain);
- if (dom_entry == NULL)
+ if (dom_entry == NULL) {
+ ret_val = -ENOENT;
goto socket_setattr_return;
- switch (dom_entry->type) {
- case NETLBL_NLTYPE_CIPSOV4:
- ret_val = cipso_v4_sock_setattr(sk,
- dom_entry->type_def.cipsov4,
- secattr);
+ }
+ switch (family) {
+ case AF_INET:
+ switch (dom_entry->type) {
+ case NETLBL_NLTYPE_ADDRSELECT:
+ ret_val = -EDESTADDRREQ;
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_sock_setattr(sk,
+ dom_entry->type_def.cipsov4,
+ secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
break;
- case NETLBL_NLTYPE_UNLABELED:
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
ret_val = 0;
break;
+#endif /* IPv6 */
default:
- ret_val = -ENOENT;
+ ret_val = -EPROTONOSUPPORT;
}
socket_setattr_return:
}
/**
+ * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
+ * @sk: the socket
+ *
+ * Description:
+ * Remove all the NetLabel labeling from @sk. The caller is responsible for
+ * ensuring that @sk is locked.
+ *
+ */
+void netlbl_sock_delattr(struct sock *sk)
+{
+ cipso_v4_sock_delattr(sk);
+}
+
+/**
* netlbl_sock_getattr - Determine the security attributes of a sock
* @sk: the sock
* @secattr: the security attributes
*
* Description:
- * Examines the given sock to see any NetLabel style labeling has been
+ * Examines the given sock to see if any NetLabel style labeling has been
* applied to the sock, if so it parses the socket label and returns the
* security attributes in @secattr. Returns zero on success, negative values
* on failure.
*
*/
-int netlbl_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
+int netlbl_sock_getattr(struct sock *sk,
+ struct netlbl_lsm_secattr *secattr)
{
int ret_val;
- ret_val = cipso_v4_sock_getattr(sk, secattr);
- if (ret_val == 0)
- return 0;
+ switch (sk->sk_family) {
+ case AF_INET:
+ ret_val = cipso_v4_sock_getattr(sk, secattr);
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ ret_val = -ENOMSG;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = -EPROTONOSUPPORT;
+ }
- return netlbl_unlabel_getattr(secattr);
+ return ret_val;
+}
+
+/**
+ * netlbl_conn_setattr - Label a connected socket using the correct protocol
+ * @sk: the socket to label
+ * @addr: the destination address
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Attach the correct label to the given connected socket using the security
+ * attributes specified in @secattr. The caller is responsible for ensuring
+ * that @sk is locked. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_conn_setattr(struct sock *sk,
+ struct sockaddr *addr,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+ struct sockaddr_in *addr4;
+ struct netlbl_domaddr4_map *af4_entry;
+
+ rcu_read_lock();
+ switch (addr->sa_family) {
+ case AF_INET:
+ addr4 = (struct sockaddr_in *)addr;
+ af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
+ addr4->sin_addr.s_addr);
+ if (af4_entry == NULL) {
+ ret_val = -ENOENT;
+ goto conn_setattr_return;
+ }
+ switch (af4_entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_sock_setattr(sk,
+ af4_entry->type_def.cipsov4,
+ secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ /* just delete the protocols we support for right now
+ * but we could remove other protocols if needed */
+ cipso_v4_sock_delattr(sk);
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
+ ret_val = 0;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = -EPROTONOSUPPORT;
+ }
+
+conn_setattr_return:
+ rcu_read_unlock();
+ return ret_val;
+}
+
+/**
+ * netlbl_req_setattr - Label a request socket using the correct protocol
+ * @req: the request socket to label
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Attach the correct label to the given socket using the security attributes
+ * specified in @secattr. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_req_setattr(struct request_sock *req,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+ struct netlbl_dom_map *dom_entry;
+ struct netlbl_domaddr4_map *af4_entry;
+ u32 proto_type;
+ struct cipso_v4_doi *proto_cv4;
+
+ rcu_read_lock();
+ dom_entry = netlbl_domhsh_getentry(secattr->domain);
+ if (dom_entry == NULL) {
+ ret_val = -ENOENT;
+ goto req_setattr_return;
+ }
+ switch (req->rsk_ops->family) {
+ case AF_INET:
+ if (dom_entry->type == NETLBL_NLTYPE_ADDRSELECT) {
+ struct inet_request_sock *req_inet = inet_rsk(req);
+ af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
+ req_inet->rmt_addr);
+ if (af4_entry == NULL) {
+ ret_val = -ENOENT;
+ goto req_setattr_return;
+ }
+ proto_type = af4_entry->type;
+ proto_cv4 = af4_entry->type_def.cipsov4;
+ } else {
+ proto_type = dom_entry->type;
+ proto_cv4 = dom_entry->type_def.cipsov4;
+ }
+ switch (proto_type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_req_setattr(req, proto_cv4, secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ /* just delete the protocols we support for right now
+ * but we could remove other protocols if needed */
+ cipso_v4_req_delattr(req);
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
+ ret_val = 0;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = -EPROTONOSUPPORT;
+ }
+
+req_setattr_return:
+ rcu_read_unlock();
+ return ret_val;
+}
+
+/**
+* netlbl_req_delattr - Delete all the NetLabel labels on a socket
+* @req: the socket
+*
+* Description:
+* Remove all the NetLabel labeling from @req.
+*
+*/
+void netlbl_req_delattr(struct request_sock *req)
+{
+ cipso_v4_req_delattr(req);
+}
+
+/**
+ * netlbl_skbuff_setattr - Label a packet using the correct protocol
+ * @skb: the packet
+ * @family: protocol family
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Attach the correct label to the given packet using the security attributes
+ * specified in @secattr. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_skbuff_setattr(struct sk_buff *skb,
+ u16 family,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+ struct iphdr *hdr4;
+ struct netlbl_domaddr4_map *af4_entry;
+
+ rcu_read_lock();
+ switch (family) {
+ case AF_INET:
+ hdr4 = ip_hdr(skb);
+ af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
+ hdr4->daddr);
+ if (af4_entry == NULL) {
+ ret_val = -ENOENT;
+ goto skbuff_setattr_return;
+ }
+ switch (af4_entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_skbuff_setattr(skb,
+ af4_entry->type_def.cipsov4,
+ secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ /* just delete the protocols we support for right now
+ * but we could remove other protocols if needed */
+ ret_val = cipso_v4_skbuff_delattr(skb);
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
+ ret_val = 0;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = -EPROTONOSUPPORT;
+ }
+
+skbuff_setattr_return:
+ rcu_read_unlock();
+ return ret_val;
}
/**
* netlbl_skbuff_getattr - Determine the security attributes of a packet
* @skb: the packet
+ * @family: protocol family
* @secattr: the security attributes
*
* Description:
*
*/
int netlbl_skbuff_getattr(const struct sk_buff *skb,
+ u16 family,
struct netlbl_lsm_secattr *secattr)
{
- if (CIPSO_V4_OPTEXIST(skb) &&
- cipso_v4_skbuff_getattr(skb, secattr) == 0)
- return 0;
+ switch (family) {
+ case AF_INET:
+ if (CIPSO_V4_OPTEXIST(skb) &&
+ cipso_v4_skbuff_getattr(skb, secattr) == 0)
+ return 0;
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ break;
+#endif /* IPv6 */
+ }
- return netlbl_unlabel_getattr(secattr);
+ return netlbl_unlabel_getattr(skb, family, secattr);
}
/**
* netlbl_skbuff_err - Handle a LSM error on a sk_buff
* @skb: the packet
* @error: the error code
+ * @gateway: true if host is acting as a gateway, false otherwise
*
* Description:
* Deal with a LSM problem when handling the packet in @skb, typically this is
* according to the packet's labeling protocol.
*
*/
-void netlbl_skbuff_err(struct sk_buff *skb, int error)
+void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
{
if (CIPSO_V4_OPTEXIST(skb))
- cipso_v4_error(skb, error, 0);
+ cipso_v4_error(skb, error, gateway);
}
/**
}
/*
+ * Protocol Engine Functions
+ */
+
+/**
+ * netlbl_audit_start - Start an audit message
+ * @type: audit message type
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Start an audit message using the type specified in @type and fill the audit
+ * message with some fields common to all NetLabel audit messages. This
+ * function should only be used by protocol engines, not LSMs. Returns a
+ * pointer to the audit buffer on success, NULL on failure.
+ *
+ */
+struct audit_buffer *netlbl_audit_start(int type,
+ struct netlbl_audit *audit_info)
+{
+ return netlbl_audit_start_common(type, audit_info);
+}
+
+/*
* Setup Functions
*/
if (ret_val != 0)
goto init_failure;
+ ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
+ if (ret_val != 0)
+ goto init_failure;
+
ret_val = netlbl_netlink_init();
if (ret_val != 0)
goto init_failure;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff