netlabel: Add functionality to set the security attributes of a packet

[linux-2.6-omap-h63xx.git] / include / net / netlabel.h

diff --git a/include/net/netlabel.h b/include/net/netlabel.h
index b3213c7c53096d97b45b5e51ca842ba01284fefc..3f67e6d49e40f4104511a3ba6e6debfa3e0c67f5 100644 (file)
--- a/include/net/netlabel.h
+++ b/include/net/netlabel.h
@@ -9,7 +9,7 @@
  */
 
 /*
- * (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
@@ -36,6 +36,8 @@
 #include <net/netlink.h>
 #include <asm/atomic.h>
 
+struct cipso_v4_doi;
+
 /*
  * NetLabel - A management interface for maintaining network packet label
  *            mapping tables for explicit packet labling protocols.
@@ -70,8 +72,9 @@
 /* NetLabel NETLINK protocol version
  *  1: initial version
  *  2: added static labels for unlabeled connections
+ *  3: network selectors added to the NetLabel/LSM domain mapping
  */
-#define NETLBL_PROTO_VERSION            2
+#define NETLBL_PROTO_VERSION            3
 
 /* NetLabel NETLINK types/families */
 #define NETLBL_NLTYPE_NONE              0
@@ -85,6 +88,8 @@
 #define NETLBL_NLTYPE_CIPSOV6_NAME      "NLBL_CIPSOv6"
 #define NETLBL_NLTYPE_UNLABELED         5
 #define NETLBL_NLTYPE_UNLABELED_NAME    "NLBL_UNLBL"
+#define NETLBL_NLTYPE_ADDRSELECT        6
+#define NETLBL_NLTYPE_ADDRSELECT_NAME   "NLBL_ADRSEL"
 
 /*
  * NetLabel - Kernel API for accessing the network packet label mappings.
@@ -101,14 +106,9 @@
 struct netlbl_audit {
        u32 secid;
        uid_t loginuid;
+       u32 sessionid;
 };
 
-/* Domain mapping definition struct */
-struct netlbl_dom_map;
-
-/* Domain mapping operations */
-int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
-
 /*
  * LSM security attributes
  */
@@ -166,7 +166,7 @@ struct netlbl_lsm_secattr_catmap {
 
 /**
  * struct netlbl_lsm_secattr - NetLabel LSM security attributes
- * @flags: indicate which attributes are contained in this structure
+ * @flags: indicate structure attributes, see NETLBL_SECATTR_*
  * @type: indicate the NLTYPE of the attributes
  * @domain: the NetLabel LSM domain
  * @cache: NetLabel LSM specific cache
@@ -184,17 +184,22 @@ struct netlbl_lsm_secattr_catmap {
  * NetLabel itself when returning security attributes to the LSM.
  *
  */
+struct netlbl_lsm_secattr {
+       u32 flags;
+       /* bitmap values for 'flags' */
 #define NETLBL_SECATTR_NONE             0x00000000
 #define NETLBL_SECATTR_DOMAIN           0x00000001
+#define NETLBL_SECATTR_DOMAIN_CPY       (NETLBL_SECATTR_DOMAIN | \
+                                        NETLBL_SECATTR_FREE_DOMAIN)
 #define NETLBL_SECATTR_CACHE            0x00000002
 #define NETLBL_SECATTR_MLS_LVL          0x00000004
 #define NETLBL_SECATTR_MLS_CAT          0x00000008
 #define NETLBL_SECATTR_SECID            0x00000010
+       /* bitmap meta-values for 'flags' */
+#define NETLBL_SECATTR_FREE_DOMAIN      0x01000000
 #define NETLBL_SECATTR_CACHEABLE        (NETLBL_SECATTR_MLS_LVL | \
                                         NETLBL_SECATTR_MLS_CAT | \
                                         NETLBL_SECATTR_SECID)
-struct netlbl_lsm_secattr {
-       u32 flags;
        u32 type;
        char *domain;
        struct netlbl_lsm_cache *cache;
@@ -307,7 +312,8 @@ static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
  */
 static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
 {
-       kfree(secattr->domain);
+       if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN)
+               kfree(secattr->domain);
        if (secattr->flags & NETLBL_SECATTR_CACHE)
                netlbl_secattr_cache_free(secattr->cache);
        if (secattr->flags & NETLBL_SECATTR_MLS_CAT)
@@ -343,6 +349,16 @@ static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
 }
 
 #ifdef CONFIG_NETLABEL
+/*
+ * LSM configuration operations
+ */
+int netlbl_cfg_map_del(const char *domain, struct netlbl_audit *audit_info);
+int netlbl_cfg_unlbl_add_map(const char *domain,
+                            struct netlbl_audit *audit_info);
+int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+                              const char *domain,
+                              struct netlbl_audit *audit_info);
+
 /*
  * LSM security attribute operations
  */
@@ -366,10 +382,13 @@ int netlbl_sock_setattr(struct sock *sk,
                        const struct netlbl_lsm_secattr *secattr);
 int netlbl_sock_getattr(struct sock *sk,
                        struct netlbl_lsm_secattr *secattr);
+int netlbl_skbuff_setattr(struct sk_buff *skb,
+                         u16 family,
+                         const struct netlbl_lsm_secattr *secattr);
 int netlbl_skbuff_getattr(const struct sk_buff *skb,
                          u16 family,
                          struct netlbl_lsm_secattr *secattr);
-void netlbl_skbuff_err(struct sk_buff *skb, int error);
+void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway);
 
 /*
  * LSM label mapping cache operations
@@ -378,6 +397,22 @@ void netlbl_cache_invalidate(void);
 int netlbl_cache_add(const struct sk_buff *skb,
                     const struct netlbl_lsm_secattr *secattr);
 #else
+static inline int netlbl_cfg_map_del(const char *domain,
+                                    struct netlbl_audit *audit_info)
+{
+       return -ENOSYS;
+}
+static inline int netlbl_cfg_unlbl_add_map(const char *domain,
+                                          struct netlbl_audit *audit_info)
+{
+       return -ENOSYS;
+}
+static inline int netlbl_cfg_cipsov4_add_map(struct cipso_v4_doi *doi_def,
+                                            const char *domain,
+                                            struct netlbl_audit *audit_info)
+{
+       return -ENOSYS;
+}
 static inline int netlbl_secattr_catmap_walk(
                                      struct netlbl_lsm_secattr_catmap *catmap,
                                      u32 offset)
@@ -419,13 +454,21 @@ static inline int netlbl_sock_getattr(struct sock *sk,
 {
        return -ENOSYS;
 }
+static inline int netlbl_skbuff_setattr(struct sk_buff *skb,
+                                     u16 family,
+                                     const struct netlbl_lsm_secattr *secattr)
+{
+       return -ENOSYS;
+}
 static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
                                        u16 family,
                                        struct netlbl_lsm_secattr *secattr)
 {
        return -ENOSYS;
 }
-static inline void netlbl_skbuff_err(struct sk_buff *skb, int error)
+static inline void netlbl_skbuff_err(struct sk_buff *skb,
+                                    int error,
+                                    int gateway)
 {
        return;
 }