obj-$(CONFIG_IP_SCTP) += sctp/
obj-$(CONFIG_IEEE80211) += ieee80211/
obj-$(CONFIG_TIPC) += tipc/
+obj-$(CONFIG_NETLABEL) += netlabel/
ifeq ($(CONFIG_NET),y)
obj-$(CONFIG_SYSCTL) += sysctl_net.o
--- /dev/null
+#
+# NetLabel configuration
+#
+
+config NETLABEL
+ bool "NetLabel subsystem support"
+ depends on NET && SECURITY
+ default n
+ ---help---
+ NetLabel provides support for explicit network packet labeling
+ protocols such as CIPSO and RIPSO. For more information see
+ Documentation/netlabel.
+
+ If you are unsure, say N.
--- /dev/null
+#
+# Makefile for the NetLabel subsystem.
+#
+# Feb 9, 2006, Paul Moore <paul.moore@hp.com>
+#
+
+# base objects
+obj-y := netlabel_user.o netlabel_kapi.o netlabel_domainhash.o
+
+# management objects
+obj-y += netlabel_mgmt.o
+
+# protocol modules
+obj-y += netlabel_unlabeled.o
+obj-y += netlabel_cipso_v4.o
+
--- /dev/null
+/*
+ * NetLabel CIPSO/IPv4 Support
+ *
+ * This file defines the CIPSO/IPv4 functions 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
+ *
+ */
+
+#ifndef _NETLABEL_CIPSO_V4
+#define _NETLABEL_CIPSO_V4
+
+#include <net/netlabel.h>
+
+/*
+ * The following NetLabel payloads are supported by the CIPSO subsystem, all
+ * of which are preceeded by the nlmsghdr struct.
+ *
+ * o ACK:
+ * Sent by the kernel in response to an applications message, applications
+ * should never send this message.
+ *
+ * +----------------------+-----------------------+
+ * | seq number (32 bits) | return code (32 bits) |
+ * +----------------------+-----------------------+
+ *
+ * seq number: the sequence number of the original message, taken from the
+ * nlmsghdr structure
+ * return code: return value, based on errno values
+ *
+ * o ADD:
+ * Sent by an application to add a new DOI mapping table, after completion
+ * of the task the kernel should ACK this message.
+ *
+ * +---------------+--------------------+---------------------+
+ * | DOI (32 bits) | map type (32 bits) | tag count (32 bits) | ...
+ * +---------------+--------------------+---------------------+
+ *
+ * +-----------------+
+ * | tag #X (8 bits) | ... repeated
+ * +-----------------+
+ *
+ * +-------------- ---- --- -- -
+ * | mapping data
+ * +-------------- ---- --- -- -
+ *
+ * DOI: the DOI value
+ * map type: the mapping table type (defined in the cipso_ipv4.h header
+ * as CIPSO_V4_MAP_*)
+ * tag count: the number of tags, must be greater than zero
+ * tag: the CIPSO tag for the DOI, tags listed first are given
+ * higher priorirty when sending packets
+ * mapping data: specific to the map type (see below)
+ *
+ * CIPSO_V4_MAP_STD
+ *
+ * +------------------+-----------------------+----------------------+
+ * | levels (32 bits) | max l level (32 bits) | max r level (8 bits) | ...
+ * +------------------+-----------------------+----------------------+
+ *
+ * +----------------------+---------------------+---------------------+
+ * | categories (32 bits) | max l cat (32 bits) | max r cat (16 bits) | ...
+ * +----------------------+---------------------+---------------------+
+ *
+ * +--------------------------+-------------------------+
+ * | local level #X (32 bits) | CIPSO level #X (8 bits) | ... repeated
+ * +--------------------------+-------------------------+
+ *
+ * +-----------------------------+-----------------------------+
+ * | local category #X (32 bits) | CIPSO category #X (16 bits) | ... repeated
+ * +-----------------------------+-----------------------------+
+ *
+ * levels: the number of level mappings
+ * max l level: the highest local level
+ * max r level: the highest remote/CIPSO level
+ * categories: the number of category mappings
+ * max l cat: the highest local category
+ * max r cat: the highest remote/CIPSO category
+ * local level: the local part of a level mapping
+ * CIPSO level: the remote/CIPSO part of a level mapping
+ * local category: the local part of a category mapping
+ * CIPSO category: the remote/CIPSO part of a category mapping
+ *
+ * CIPSO_V4_MAP_PASS
+ *
+ * No mapping data is needed for this map type.
+ *
+ * o REMOVE:
+ * Sent by an application to remove a specific DOI mapping table from the
+ * CIPSO V4 system. The kernel should ACK this message.
+ *
+ * +---------------+
+ * | DOI (32 bits) |
+ * +---------------+
+ *
+ * DOI: the DOI value
+ *
+ * o LIST:
+ * Sent by an application to list the details of a DOI definition. The
+ * kernel should send an ACK on error or a response as indicated below. The
+ * application generated message format is shown below.
+ *
+ * +---------------+
+ * | DOI (32 bits) |
+ * +---------------+
+ *
+ * DOI: the DOI value
+ *
+ * The valid response message format depends on the type of the DOI mapping,
+ * the known formats are shown below.
+ *
+ * +--------------------+
+ * | map type (32 bits) | ...
+ * +--------------------+
+ *
+ * map type: the DOI mapping table type (defined in the cipso_ipv4.h
+ * header as CIPSO_V4_MAP_*)
+ *
+ * (map type == CIPSO_V4_MAP_STD)
+ *
+ * +----------------+------------------+----------------------+
+ * | tags (32 bits) | levels (32 bits) | categories (32 bits) | ...
+ * +----------------+------------------+----------------------+
+ *
+ * +-----------------+
+ * | tag #X (8 bits) | ... repeated
+ * +-----------------+
+ *
+ * +--------------------------+-------------------------+
+ * | local level #X (32 bits) | CIPSO level #X (8 bits) | ... repeated
+ * +--------------------------+-------------------------+
+ *
+ * +-----------------------------+-----------------------------+
+ * | local category #X (32 bits) | CIPSO category #X (16 bits) | ... repeated
+ * +-----------------------------+-----------------------------+
+ *
+ * tags: the number of CIPSO tag types
+ * levels: the number of level mappings
+ * categories: the number of category mappings
+ * tag: the tag number, tags listed first are given higher
+ * priority when sending packets
+ * local level: the local part of a level mapping
+ * CIPSO level: the remote/CIPSO part of a level mapping
+ * local category: the local part of a category mapping
+ * CIPSO category: the remote/CIPSO part of a category mapping
+ *
+ * (map type == CIPSO_V4_MAP_PASS)
+ *
+ * +----------------+
+ * | tags (32 bits) | ...
+ * +----------------+
+ *
+ * +-----------------+
+ * | tag #X (8 bits) | ... repeated
+ * +-----------------+
+ *
+ * tags: the number of CIPSO tag types
+ * tag: the tag number, tags listed first are given higher
+ * priority when sending packets
+ *
+ * o LISTALL:
+ * This message is sent by an application to list the valid DOIs on the
+ * system. There is no payload and the kernel should respond with an ACK
+ * or the following message.
+ *
+ * +---------------------+------------------+-----------------------+
+ * | DOI count (32 bits) | DOI #X (32 bits) | map type #X (32 bits) |
+ * +---------------------+------------------+-----------------------+
+ *
+ * +-----------------------+
+ * | map type #X (32 bits) | ...
+ * +-----------------------+
+ *
+ * DOI count: the number of DOIs
+ * DOI: the DOI value
+ * map type: the DOI mapping table type (defined in the cipso_ipv4.h
+ * header as CIPSO_V4_MAP_*)
+ *
+ */
+
+/* NetLabel CIPSOv4 commands */
+enum {
+ NLBL_CIPSOV4_C_UNSPEC,
+ NLBL_CIPSOV4_C_ACK,
+ NLBL_CIPSOV4_C_ADD,
+ NLBL_CIPSOV4_C_REMOVE,
+ NLBL_CIPSOV4_C_LIST,
+ NLBL_CIPSOV4_C_LISTALL,
+ __NLBL_CIPSOV4_C_MAX,
+};
+#define NLBL_CIPSOV4_C_MAX (__NLBL_CIPSOV4_C_MAX - 1)
+
+/* NetLabel protocol functions */
+int netlbl_cipsov4_genl_init(void);
+
+#endif
--- /dev/null
+/*
+ * NetLabel Domain Hash Table
+ *
+ * This file manages the domain hash table that NetLabel uses to determine
+ * which network labeling protocol to use for a given domain. 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/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <net/netlabel.h>
+#include <net/cipso_ipv4.h>
+#include <asm/bug.h>
+
+#include "netlabel_mgmt.h"
+#include "netlabel_domainhash.h"
+
+struct netlbl_domhsh_tbl {
+ struct list_head *tbl;
+ u32 size;
+};
+
+/* Domain hash table */
+/* XXX - updates should be so rare that having one spinlock for the entire
+ * hash table should be okay */
+DEFINE_SPINLOCK(netlbl_domhsh_lock);
+static struct netlbl_domhsh_tbl *netlbl_domhsh = NULL;
+
+/* Default domain mapping */
+DEFINE_SPINLOCK(netlbl_domhsh_def_lock);
+static struct netlbl_dom_map *netlbl_domhsh_def = NULL;
+
+/*
+ * Domain Hash Table Helper Functions
+ */
+
+/**
+ * netlbl_domhsh_free_entry - Frees a domain hash table entry
+ * @entry: the entry's RCU field
+ *
+ * Description:
+ * This function is designed to be used as a callback to the call_rcu()
+ * function so that the memory allocated to a hash table entry can be released
+ * safely.
+ *
+ */
+static void netlbl_domhsh_free_entry(struct rcu_head *entry)
+{
+ struct netlbl_dom_map *ptr;
+
+ ptr = container_of(entry, struct netlbl_dom_map, rcu);
+ kfree(ptr->domain);
+ kfree(ptr);
+}
+
+/**
+ * netlbl_domhsh_hash - Hashing function for the domain hash table
+ * @domain: the domain name to hash
+ *
+ * Description:
+ * This is the hashing function for the domain hash table, it returns the
+ * correct bucket number for the domain. The caller is responsibile for
+ * calling the rcu_read_[un]lock() functions.
+ *
+ */
+static u32 netlbl_domhsh_hash(const char *key)
+{
+ u32 iter;
+ u32 val;
+ u32 len;
+
+ /* This is taken (with slight modification) from
+ * security/selinux/ss/symtab.c:symhash() */
+
+ for (iter = 0, val = 0, len = strlen(key); iter < len; iter++)
+ val = (val << 4 | (val >> (8 * sizeof(u32) - 4))) ^ key[iter];
+ return val & (rcu_dereference(netlbl_domhsh)->size - 1);
+}
+
+/**
+ * netlbl_domhsh_search - Search for a domain entry
+ * @domain: the domain
+ * @def: return default if no match is found
+ *
+ * Description:
+ * Searches the domain hash table and returns a pointer to the hash table
+ * entry if found, otherwise NULL is returned. If @def is non-zero and a
+ * match is not found in the domain hash table the default mapping is returned
+ * if it exists. The caller is responsibile for the rcu hash table locks
+ * (i.e. the caller much call rcu_read_[un]lock()).
+ *
+ */
+static struct netlbl_dom_map *netlbl_domhsh_search(const char *domain, u32 def)
+{
+ u32 bkt;
+ struct netlbl_dom_map *iter;
+
+ if (domain != NULL) {
+ bkt = netlbl_domhsh_hash(domain);
+ list_for_each_entry_rcu(iter, &netlbl_domhsh->tbl[bkt], list)
+ if (iter->valid && strcmp(iter->domain, domain) == 0)
+ return iter;
+ }
+
+ if (def != 0) {
+ iter = rcu_dereference(netlbl_domhsh_def);
+ if (iter != NULL && iter->valid)
+ return iter;
+ }
+
+ return NULL;
+}
+
+/*
+ * Domain Hash Table Functions
+ */
+
+/**
+ * netlbl_domhsh_init - Init for the domain hash
+ * @size: the number of bits to use for the hash buckets
+ *
+ * Description:
+ * Initializes the domain hash table, should be called only by
+ * netlbl_user_init() during initialization. Returns zero on success, non-zero
+ * values on error.
+ *
+ */
+int netlbl_domhsh_init(u32 size)
+{
+ u32 iter;
+ struct netlbl_domhsh_tbl *hsh_tbl;
+
+ if (size == 0)
+ return -EINVAL;
+
+ hsh_tbl = kmalloc(sizeof(*hsh_tbl), GFP_KERNEL);
+ if (hsh_tbl == NULL)
+ return -ENOMEM;
+ hsh_tbl->size = 1 << size;
+ hsh_tbl->tbl = kcalloc(hsh_tbl->size,
+ sizeof(struct list_head),
+ GFP_KERNEL);
+ if (hsh_tbl->tbl == NULL) {
+ kfree(hsh_tbl);
+ return -ENOMEM;
+ }
+ for (iter = 0; iter < hsh_tbl->size; iter++)
+ INIT_LIST_HEAD(&hsh_tbl->tbl[iter]);
+
+ rcu_read_lock();
+ spin_lock(&netlbl_domhsh_lock);
+ rcu_assign_pointer(netlbl_domhsh, hsh_tbl);
+ spin_unlock(&netlbl_domhsh_lock);
+ rcu_read_unlock();
+
+ return 0;
+}
+
+/**
+ * netlbl_domhsh_add - Adds a entry to the domain hash table
+ * @entry: the entry to add
+ *
+ * Description:
+ * Adds a new entry to the domain hash table and handles any updates to the
+ * lower level protocol handler (i.e. CIPSO). Returns zero on success,
+ * negative on failure.
+ *
+ */
+int netlbl_domhsh_add(struct netlbl_dom_map *entry)
+{
+ int ret_val;
+ u32 bkt;
+
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = 0;
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_doi_domhsh_add(entry->type_def.cipsov4,
+ entry->domain);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (ret_val != 0)
+ return ret_val;
+
+ entry->valid = 1;
+ INIT_RCU_HEAD(&entry->rcu);
+
+ ret_val = 0;
+ rcu_read_lock();
+ if (entry->domain != NULL) {
+ bkt = netlbl_domhsh_hash(entry->domain);
+ spin_lock(&netlbl_domhsh_lock);
+ if (netlbl_domhsh_search(entry->domain, 0) == NULL)
+ list_add_tail_rcu(&entry->list,
+ &netlbl_domhsh->tbl[bkt]);
+ else
+ ret_val = -EEXIST;
+ spin_unlock(&netlbl_domhsh_lock);
+ } else if (entry->domain == NULL) {
+ INIT_LIST_HEAD(&entry->list);
+ spin_lock(&netlbl_domhsh_def_lock);
+ if (rcu_dereference(netlbl_domhsh_def) == NULL)
+ rcu_assign_pointer(netlbl_domhsh_def, entry);
+ else
+ ret_val = -EEXIST;
+ spin_unlock(&netlbl_domhsh_def_lock);
+ } else
+ ret_val = -EINVAL;
+ rcu_read_unlock();
+
+ if (ret_val != 0) {
+ switch (entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ if (cipso_v4_doi_domhsh_remove(entry->type_def.cipsov4,
+ entry->domain) != 0)
+ BUG();
+ break;
+ }
+ }
+
+ return ret_val;
+}
+
+/**
+ * netlbl_domhsh_add_default - Adds the default entry to the domain hash table
+ * @entry: the entry to add
+ *
+ * Description:
+ * Adds a new default entry to the domain hash table and handles any updates
+ * to the lower level protocol handler (i.e. CIPSO). Returns zero on success,
+ * negative on failure.
+ *
+ */
+int netlbl_domhsh_add_default(struct netlbl_dom_map *entry)
+{
+ return netlbl_domhsh_add(entry);
+}
+
+/**
+ * netlbl_domhsh_remove - Removes an entry from the domain hash table
+ * @domain: the domain to remove
+ *
+ * Description:
+ * Removes an entry from the domain hash table and handles any updates to the
+ * lower level protocol handler (i.e. CIPSO). Returns zero on success,
+ * negative on failure.
+ *
+ */
+int netlbl_domhsh_remove(const char *domain)
+{
+ int ret_val = -ENOENT;
+ struct netlbl_dom_map *entry;
+
+ rcu_read_lock();
+ if (domain != NULL)
+ entry = netlbl_domhsh_search(domain, 0);
+ else
+ entry = netlbl_domhsh_search(domain, 1);
+ if (entry == NULL)
+ goto remove_return;
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_doi_domhsh_remove(entry->type_def.cipsov4,
+ entry->domain);
+ if (ret_val != 0)
+ goto remove_return;
+ break;
+ }
+ ret_val = 0;
+ if (entry != rcu_dereference(netlbl_domhsh_def)) {
+ spin_lock(&netlbl_domhsh_lock);
+ if (entry->valid) {
+ entry->valid = 0;
+ list_del_rcu(&entry->list);
+ } else
+ ret_val = -ENOENT;
+ spin_unlock(&netlbl_domhsh_lock);
+ } else {
+ spin_lock(&netlbl_domhsh_def_lock);
+ if (entry->valid) {
+ entry->valid = 0;
+ rcu_assign_pointer(netlbl_domhsh_def, NULL);
+ } else
+ ret_val = -ENOENT;
+ spin_unlock(&netlbl_domhsh_def_lock);
+ }
+ if (ret_val == 0)
+ call_rcu(&entry->rcu, netlbl_domhsh_free_entry);
+
+remove_return:
+ rcu_read_unlock();
+ return ret_val;
+}
+
+/**
+ * netlbl_domhsh_remove_default - Removes the default entry from the table
+ *
+ * Description:
+ * Removes/resets the default entry for the domain hash table and handles any
+ * updates to the lower level protocol handler (i.e. CIPSO). Returns zero on
+ * success, non-zero on failure.
+ *
+ */
+int netlbl_domhsh_remove_default(void)
+{
+ return netlbl_domhsh_remove(NULL);
+}
+
+/**
+ * netlbl_domhsh_getentry - Get an entry from the domain hash table
+ * @domain: the domain name to search for
+ *
+ * Description:
+ * Look through the domain hash table searching for an entry to match @domain,
+ * return a pointer to a copy of the entry or NULL. The caller is responsibile
+ * for ensuring that rcu_read_[un]lock() is called.
+ *
+ */
+struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain)
+{
+ return netlbl_domhsh_search(domain, 1);
+}
+
+/**
+ * netlbl_domhsh_dump - Dump the domain hash table into a sk_buff
+ *
+ * Description:
+ * Dump the domain hash table into a buffer suitable for returning to an
+ * application in response to a NetLabel management DOMAIN message. This
+ * function may fail if another process is growing the hash table at the same
+ * time. The returned sk_buff has room at the front of the sk_buff for
+ * @headroom bytes. See netlabel.h for the DOMAIN message format. Returns a
+ * pointer to a sk_buff on success, NULL on error.
+ *
+ */
+struct sk_buff *netlbl_domhsh_dump(size_t headroom)
+{
+ struct sk_buff *skb = NULL;
+ ssize_t buf_len;
+ u32 bkt_iter;
+ u32 dom_cnt = 0;
+ struct netlbl_domhsh_tbl *hsh_tbl;
+ struct netlbl_dom_map *list_iter;
+ ssize_t tmp_len;
+
+ buf_len = NETLBL_LEN_U32;
+ rcu_read_lock();
+ hsh_tbl = rcu_dereference(netlbl_domhsh);
+ for (bkt_iter = 0; bkt_iter < hsh_tbl->size; bkt_iter++)
+ list_for_each_entry_rcu(list_iter,
+ &hsh_tbl->tbl[bkt_iter], list) {
+ buf_len += NETLBL_LEN_U32 +
+ nla_total_size(strlen(list_iter->domain) + 1);
+ switch (list_iter->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ buf_len += 2 * NETLBL_LEN_U32;
+ break;
+ }
+ dom_cnt++;
+ }
+
+ skb = netlbl_netlink_alloc_skb(headroom, buf_len, GFP_ATOMIC);
+ if (skb == NULL)
+ goto dump_failure;
+
+ if (nla_put_u32(skb, NLA_U32, dom_cnt) != 0)
+ goto dump_failure;
+ buf_len -= NETLBL_LEN_U32;
+ hsh_tbl = rcu_dereference(netlbl_domhsh);
+ for (bkt_iter = 0; bkt_iter < hsh_tbl->size; bkt_iter++)
+ list_for_each_entry_rcu(list_iter,
+ &hsh_tbl->tbl[bkt_iter], list) {
+ tmp_len = nla_total_size(strlen(list_iter->domain) +
+ 1);
+ if (buf_len < NETLBL_LEN_U32 + tmp_len)
+ goto dump_failure;
+ if (nla_put_string(skb,
+ NLA_STRING,
+ list_iter->domain) != 0)
+ goto dump_failure;
+ if (nla_put_u32(skb, NLA_U32, list_iter->type) != 0)
+ goto dump_failure;
+ buf_len -= NETLBL_LEN_U32 + tmp_len;
+ switch (list_iter->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ if (buf_len < 2 * NETLBL_LEN_U32)
+ goto dump_failure;
+ if (nla_put_u32(skb,
+ NLA_U32,
+ list_iter->type_def.cipsov4->type) != 0)
+ goto dump_failure;
+ if (nla_put_u32(skb,
+ NLA_U32,
+ list_iter->type_def.cipsov4->doi) != 0)
+ goto dump_failure;
+ buf_len -= 2 * NETLBL_LEN_U32;
+ break;
+ }
+ }
+ rcu_read_unlock();
+
+ return skb;
+
+dump_failure:
+ rcu_read_unlock();
+ kfree_skb(skb);
+ return NULL;
+}
+
+/**
+ * netlbl_domhsh_dump_default - Dump the default domain mapping into a sk_buff
+ *
+ * Description:
+ * Dump the default domain mapping into a buffer suitable for returning to an
+ * application in response to a NetLabel management DEFDOMAIN message. This
+ * function may fail if another process is changing the default domain mapping
+ * at the same time. The returned sk_buff has room at the front of the
+ * skb_buff for @headroom bytes. See netlabel.h for the DEFDOMAIN message
+ * format. Returns a pointer to a sk_buff on success, NULL on error.
+ *
+ */
+struct sk_buff *netlbl_domhsh_dump_default(size_t headroom)
+{
+ struct sk_buff *skb;
+ ssize_t buf_len;
+ struct netlbl_dom_map *entry;
+
+ buf_len = NETLBL_LEN_U32;
+ rcu_read_lock();
+ entry = rcu_dereference(netlbl_domhsh_def);
+ if (entry != NULL)
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ buf_len += 2 * NETLBL_LEN_U32;
+ break;
+ }
+
+ skb = netlbl_netlink_alloc_skb(headroom, buf_len, GFP_ATOMIC);
+ if (skb == NULL)
+ goto dump_default_failure;
+
+ if (entry != rcu_dereference(netlbl_domhsh_def))
+ goto dump_default_failure;
+ if (entry != NULL) {
+ if (nla_put_u32(skb, NLA_U32, entry->type) != 0)
+ goto dump_default_failure;
+ buf_len -= NETLBL_LEN_U32;
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ if (buf_len < 2 * NETLBL_LEN_U32)
+ goto dump_default_failure;
+ if (nla_put_u32(skb,
+ NLA_U32,
+ entry->type_def.cipsov4->type) != 0)
+ goto dump_default_failure;
+ if (nla_put_u32(skb,
+ NLA_U32,
+ entry->type_def.cipsov4->doi) != 0)
+ goto dump_default_failure;
+ buf_len -= 2 * NETLBL_LEN_U32;
+ break;
+ }
+ } else
+ nla_put_u32(skb, NLA_U32, NETLBL_NLTYPE_NONE);
+ rcu_read_unlock();
+
+ return skb;
+
+dump_default_failure:
+ rcu_read_unlock();
+ kfree_skb(skb);
+ return NULL;
+}
--- /dev/null
+/*
+ * NetLabel Domain Hash Table
+ *
+ * This file manages the domain hash table that NetLabel uses to determine
+ * which network labeling protocol to use for a given domain. 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
+ *
+ */
+
+#ifndef _NETLABEL_DOMAINHASH_H
+#define _NETLABEL_DOMAINHASH_H
+
+/* Domain hash table size */
+/* XXX - currently this number is an uneducated guess */
+#define NETLBL_DOMHSH_BITSIZE 7
+
+/* Domain mapping definition struct */
+struct netlbl_dom_map {
+ char *domain;
+ u32 type;
+ union {
+ struct cipso_v4_doi *cipsov4;
+ } type_def;
+
+ u32 valid;
+ struct list_head list;
+ struct rcu_head rcu;
+};
+
+/* init function */
+int netlbl_domhsh_init(u32 size);
+
+/* Manipulate the domain hash table */
+int netlbl_domhsh_add(struct netlbl_dom_map *entry);
+int netlbl_domhsh_add_default(struct netlbl_dom_map *entry);
+int netlbl_domhsh_remove_default(void);
+struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
+struct sk_buff *netlbl_domhsh_dump(size_t headroom);
+struct sk_buff *netlbl_domhsh_dump_default(size_t headroom);
+
+#endif
--- /dev/null
+/*
+ * NetLabel Kernel API
+ *
+ * This file defines the kernel API 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/init.h>
+#include <linux/types.h>
+#include <net/ip.h>
+#include <net/netlabel.h>
+#include <net/cipso_ipv4.h>
+#include <asm/bug.h>
+
+#include "netlabel_domainhash.h"
+#include "netlabel_unlabeled.h"
+#include "netlabel_user.h"
+
+/*
+ * LSM Functions
+ */
+
+/**
+ * netlbl_socket_setattr - Label a socket using the correct protocol
+ * @sock: the socket to label
+ * @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
+ * @sock->sk, which means it either needs to be in the process of being
+ * created or locked via lock_sock(sock->sk). Returns zero on success,
+ * negative values on failure.
+ *
+ */
+int netlbl_socket_setattr(const struct socket *sock,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -ENOENT;
+ struct netlbl_dom_map *dom_entry;
+
+ rcu_read_lock();
+ dom_entry = netlbl_domhsh_getentry(secattr->domain);
+ if (dom_entry == NULL)
+ goto socket_setattr_return;
+ switch (dom_entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_socket_setattr(sock,
+ dom_entry->type_def.cipsov4,
+ secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
+
+socket_setattr_return:
+ rcu_read_unlock();
+ return ret_val;
+}
+
+/**
+ * netlbl_socket_getattr - Determine the security attributes of a socket
+ * @sock: the socket
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Examines the given socket to see any NetLabel style labeling has been
+ * applied to the socket, if so it parses the socket label and returns the
+ * security attributes in @secattr. Returns zero on success, negative values
+ * on failure.
+ *
+ */
+int netlbl_socket_getattr(const struct socket *sock,
+ struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+
+ ret_val = cipso_v4_socket_getattr(sock, secattr);
+ if (ret_val == 0)
+ return 0;
+
+ return netlbl_unlabel_getattr(secattr);
+}
+
+/**
+ * netlbl_skbuff_getattr - Determine the security attributes of a packet
+ * @skb: the packet
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Examines the given packet to see if a recognized form of packet labeling
+ * is present, if so it parses the packet label and returns the security
+ * attributes in @secattr. Returns zero on success, negative values on
+ * failure.
+ *
+ */
+int netlbl_skbuff_getattr(const struct sk_buff *skb,
+ struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+
+ ret_val = cipso_v4_skbuff_getattr(skb, secattr);
+ if (ret_val == 0)
+ return 0;
+
+ return netlbl_unlabel_getattr(secattr);
+}
+
+/**
+ * netlbl_skbuff_err - Handle a LSM error on a sk_buff
+ * @skb: the packet
+ * @error: the error code
+ *
+ * Description:
+ * Deal with a LSM problem when handling the packet in @skb, typically this is
+ * a permission denied problem (-EACCES). The correct action is determined
+ * according to the packet's labeling protocol.
+ *
+ */
+void netlbl_skbuff_err(struct sk_buff *skb, int error)
+{
+ if (CIPSO_V4_OPTEXIST(skb))
+ cipso_v4_error(skb, error, 0);
+}
+
+/**
+ * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
+ *
+ * Description:
+ * For all of the NetLabel protocols that support some form of label mapping
+ * cache, invalidate the cache. Returns zero on success, negative values on
+ * error.
+ *
+ */
+void netlbl_cache_invalidate(void)
+{
+ cipso_v4_cache_invalidate();
+}
+
+/**
+ * netlbl_cache_add - Add an entry to a NetLabel protocol cache
+ * @skb: the packet
+ * @secattr: the packet's security attributes
+ *
+ * Description:
+ * Add the LSM security attributes for the given packet to the underlying
+ * NetLabel protocol's label mapping cache. Returns zero on success, negative
+ * values on error.
+ *
+ */
+int netlbl_cache_add(const struct sk_buff *skb,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ if (secattr->cache.data == NULL)
+ return -ENOMSG;
+
+ if (CIPSO_V4_OPTEXIST(skb))
+ return cipso_v4_cache_add(skb, secattr);
+
+ return -ENOMSG;
+}
+
+/*
+ * Setup Functions
+ */
+
+/**
+ * netlbl_init - Initialize NetLabel
+ *
+ * Description:
+ * Perform the required NetLabel initialization before first use.
+ *
+ */
+static int __init netlbl_init(void)
+{
+ int ret_val;
+
+ printk(KERN_INFO "NetLabel: Initializing\n");
+ printk(KERN_INFO "NetLabel: domain hash size = %u\n",
+ (1 << NETLBL_DOMHSH_BITSIZE));
+ printk(KERN_INFO "NetLabel: protocols ="
+ " UNLABELED"
+ " CIPSOv4"
+ "\n");
+
+ ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
+ if (ret_val != 0)
+ goto init_failure;
+
+ ret_val = netlbl_netlink_init();
+ if (ret_val != 0)
+ goto init_failure;
+
+ ret_val = netlbl_unlabel_defconf();
+ if (ret_val != 0)
+ goto init_failure;
+ printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
+
+ return 0;
+
+init_failure:
+ panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
+}
+
+subsys_initcall(netlbl_init);
--- /dev/null
+/*
+ * NetLabel Management Support
+ *
+ * This file defines the management functions 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/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 <net/cipso_ipv4.h>
+
+#include "netlabel_domainhash.h"
+#include "netlabel_user.h"
+#include "netlabel_mgmt.h"
+
+/* NetLabel Generic NETLINK CIPSOv4 family */
+static struct genl_family netlbl_mgmt_gnl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_MGMT_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = 0,
+};
+
+
+/*
+ * NetLabel Command Handlers
+ */
+
+/**
+ * netlbl_mgmt_add - Handle an ADD message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated ADD message and add the domains from the message
+ * to the hash table. See netlabel.h for a description of the message format.
+ * Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_mgmt_add(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -EINVAL;
+ struct nlattr *msg_ptr = netlbl_netlink_payload_data(skb);
+ int msg_len = netlbl_netlink_payload_len(skb);
+ u32 count;
+ struct netlbl_dom_map *entry = NULL;
+ u32 iter;
+ u32 tmp_val;
+ int tmp_size;
+
+ ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
+ if (ret_val != 0)
+ goto add_failure;
+
+ if (msg_len < NETLBL_LEN_U32)
+ goto add_failure;
+ count = netlbl_getinc_u32(&msg_ptr, &msg_len);
+
+ for (iter = 0; iter < count && msg_len > 0; iter++, entry = NULL) {
+ if (msg_len <= 0) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (entry == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ tmp_size = nla_len(msg_ptr);
+ if (tmp_size <= 0 || tmp_size > msg_len) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ entry->domain = kmalloc(tmp_size, GFP_KERNEL);
+ if (entry->domain == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ nla_strlcpy(entry->domain, msg_ptr, tmp_size);
+ entry->domain[tmp_size - 1] = '\0';
+ msg_ptr = nla_next(msg_ptr, &msg_len);
+
+ if (msg_len < NETLBL_LEN_U32) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
+ entry->type = tmp_val;
+ switch (tmp_val) {
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = netlbl_domhsh_add(entry);
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ if (msg_len < NETLBL_LEN_U32) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
+ /* We should be holding a rcu_read_lock() here
+ * while we hold the result but since the entry
+ * will always be deleted when the CIPSO DOI
+ * is deleted we aren't going to keep the lock. */
+ rcu_read_lock();
+ entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
+ if (entry->type_def.cipsov4 == NULL) {
+ rcu_read_unlock();
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ ret_val = netlbl_domhsh_add(entry);
+ rcu_read_unlock();
+ break;
+ default:
+ ret_val = -EINVAL;
+ }
+ if (ret_val != 0)
+ goto add_failure;
+ }
+
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ NETLBL_E_OK);
+ return 0;
+
+add_failure:
+ if (entry)
+ kfree(entry->domain);
+ kfree(entry);
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * netlbl_mgmt_remove - Handle a REMOVE message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated REMOVE message and remove the specified domain
+ * mappings. Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_mgmt_remove(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -EINVAL;
+ struct nlattr *msg_ptr = netlbl_netlink_payload_data(skb);
+ int msg_len = netlbl_netlink_payload_len(skb);
+ u32 count;
+ u32 iter;
+ int tmp_size;
+ unsigned char *domain;
+
+ ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
+ if (ret_val != 0)
+ goto remove_return;
+
+ if (msg_len < NETLBL_LEN_U32)
+ goto remove_return;
+ count = netlbl_getinc_u32(&msg_ptr, &msg_len);
+
+ for (iter = 0; iter < count && msg_len > 0; iter++) {
+ if (msg_len <= 0) {
+ ret_val = -EINVAL;
+ goto remove_return;
+ }
+ tmp_size = nla_len(msg_ptr);
+ domain = nla_data(msg_ptr);
+ if (tmp_size <= 0 || tmp_size > msg_len ||
+ domain[tmp_size - 1] != '\0') {
+ ret_val = -EINVAL;
+ goto remove_return;
+ }
+ ret_val = netlbl_domhsh_remove(domain);
+ if (ret_val != 0)
+ goto remove_return;
+ msg_ptr = nla_next(msg_ptr, &msg_len);
+ }
+
+ ret_val = 0;
+
+remove_return:
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * netlbl_mgmt_list - Handle a LIST message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated LIST message and dumps the domain hash table in a
+ * form suitable for use in a kernel generated LIST message. Returns zero on
+ * success, negative values on failure.
+ *
+ */
+static int netlbl_mgmt_list(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -ENOMEM;
+ struct sk_buff *ans_skb;
+
+ ans_skb = netlbl_domhsh_dump(NLMSG_SPACE(GENL_HDRLEN));
+ if (ans_skb == NULL)
+ goto list_failure;
+ netlbl_netlink_hdr_push(ans_skb,
+ info->snd_pid,
+ 0,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_LIST);
+
+ 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_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * 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)
+{
+ int ret_val = -EINVAL;
+ struct nlattr *msg_ptr = netlbl_netlink_payload_data(skb);
+ int msg_len = netlbl_netlink_payload_len(skb);
+ struct netlbl_dom_map *entry = NULL;
+ u32 tmp_val;
+
+ ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
+ if (ret_val != 0)
+ goto adddef_failure;
+
+ if (msg_len < NETLBL_LEN_U32)
+ goto adddef_failure;
+ tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (entry == NULL) {
+ ret_val = -ENOMEM;
+ goto adddef_failure;
+ }
+
+ entry->type = tmp_val;
+ switch (entry->type) {
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = netlbl_domhsh_add_default(entry);
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ if (msg_len < NETLBL_LEN_U32) {
+ ret_val = -EINVAL;
+ goto adddef_failure;
+ }
+ tmp_val = netlbl_getinc_u32(&msg_ptr, &msg_len);
+ /* We should be holding a rcu_read_lock here while we
+ * hold the result but since the entry will always be
+ * deleted when the CIPSO DOI is deleted we are going
+ * to skip the lock. */
+ rcu_read_lock();
+ entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
+ if (entry->type_def.cipsov4 == NULL) {
+ rcu_read_unlock();
+ ret_val = -EINVAL;
+ goto adddef_failure;
+ }
+ ret_val = netlbl_domhsh_add_default(entry);
+ rcu_read_unlock();
+ break;
+ default:
+ ret_val = -EINVAL;
+ }
+ if (ret_val != 0)
+ goto adddef_failure;
+
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ NETLBL_E_OK);
+ return 0;
+
+adddef_failure:
+ kfree(entry);
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * 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)
+{
+ int ret_val;
+
+ ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
+ if (ret_val != 0)
+ goto removedef_return;
+
+ ret_val = netlbl_domhsh_remove_default();
+
+removedef_return:
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * 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;
+
+ ans_skb = netlbl_domhsh_dump_default(NLMSG_SPACE(GENL_HDRLEN));
+ if (ans_skb == NULL)
+ goto listdef_failure;
+ netlbl_netlink_hdr_push(ans_skb,
+ info->snd_pid,
+ 0,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_LISTDEF);
+
+ ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ if (ret_val != 0)
+ goto listdef_failure;
+
+ return 0;
+
+listdef_failure:
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * netlbl_mgmt_modules - Handle a MODULES message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated MODULES message and respond accordingly.
+ *
+ */
+static int netlbl_mgmt_modules(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -ENOMEM;
+ size_t data_size;
+ u32 mod_count;
+ struct sk_buff *ans_skb = NULL;
+
+ /* unlabeled + cipsov4 */
+ mod_count = 2;
+
+ data_size = GENL_HDRLEN + NETLBL_LEN_U32 + mod_count * NETLBL_LEN_U32;
+ ans_skb = netlbl_netlink_alloc_skb(0, data_size, GFP_KERNEL);
+ if (ans_skb == NULL)
+ goto modules_failure;
+
+ if (netlbl_netlink_hdr_put(ans_skb,
+ info->snd_pid,
+ 0,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_MODULES) == NULL)
+ goto modules_failure;
+
+ ret_val = nla_put_u32(ans_skb, NLA_U32, mod_count);
+ if (ret_val != 0)
+ goto modules_failure;
+ ret_val = nla_put_u32(ans_skb, NLA_U32, NETLBL_NLTYPE_UNLABELED);
+ if (ret_val != 0)
+ goto modules_failure;
+ ret_val = nla_put_u32(ans_skb, NLA_U32, NETLBL_NLTYPE_CIPSOV4);
+ if (ret_val != 0)
+ goto modules_failure;
+
+ ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ if (ret_val != 0)
+ goto modules_failure;
+
+ return 0;
+
+modules_failure:
+ kfree_skb(ans_skb);
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+/**
+ * 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;
+
+ ans_skb = netlbl_netlink_alloc_skb(0,
+ GENL_HDRLEN + NETLBL_LEN_U32,
+ GFP_KERNEL);
+ if (ans_skb == NULL)
+ goto version_failure;
+ if (netlbl_netlink_hdr_put(ans_skb,
+ info->snd_pid,
+ 0,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_VERSION) == NULL)
+ goto version_failure;
+
+ ret_val = nla_put_u32(ans_skb, NLA_U32, NETLBL_PROTO_VERSION);
+ if (ret_val != 0)
+ goto version_failure;
+
+ ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ if (ret_val != 0)
+ goto version_failure;
+
+ return 0;
+
+version_failure:
+ kfree_skb(ans_skb);
+ netlbl_netlink_send_ack(info,
+ netlbl_mgmt_gnl_family.id,
+ NLBL_MGMT_C_ACK,
+ -ret_val);
+ return ret_val;
+}
+
+
+/*
+ * NetLabel Generic NETLINK Command Definitions
+ */
+
+static struct genl_ops netlbl_mgmt_genl_c_add = {
+ .cmd = NLBL_MGMT_C_ADD,
+ .flags = 0,
+ .doit = netlbl_mgmt_add,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_remove = {
+ .cmd = NLBL_MGMT_C_REMOVE,
+ .flags = 0,
+ .doit = netlbl_mgmt_remove,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_list = {
+ .cmd = NLBL_MGMT_C_LIST,
+ .flags = 0,
+ .doit = netlbl_mgmt_list,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_adddef = {
+ .cmd = NLBL_MGMT_C_ADDDEF,
+ .flags = 0,
+ .doit = netlbl_mgmt_adddef,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_removedef = {
+ .cmd = NLBL_MGMT_C_REMOVEDEF,
+ .flags = 0,
+ .doit = netlbl_mgmt_removedef,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_listdef = {
+ .cmd = NLBL_MGMT_C_LISTDEF,
+ .flags = 0,
+ .doit = netlbl_mgmt_listdef,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_modules = {
+ .cmd = NLBL_MGMT_C_MODULES,
+ .flags = 0,
+ .doit = netlbl_mgmt_modules,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_mgmt_genl_c_version = {
+ .cmd = NLBL_MGMT_C_VERSION,
+ .flags = 0,
+ .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 netlbl_mgmt_genl_init(void)
+{
+ int ret_val;
+
+ ret_val = genl_register_family(&netlbl_mgmt_gnl_family);
+ if (ret_val != 0)
+ return ret_val;
+
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_add);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_remove);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_list);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_adddef);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_removedef);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_listdef);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_modules);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_mgmt_gnl_family,
+ &netlbl_mgmt_genl_c_version);
+ if (ret_val != 0)
+ return ret_val;
+
+ return 0;
+}
--- /dev/null
+/*
+ * NetLabel Management Support
+ *
+ * This file defines the management functions 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
+ *
+ */
+
+#ifndef _NETLABEL_MGMT_H
+#define _NETLABEL_MGMT_H
+
+#include <net/netlabel.h>
+
+/*
+ * The following NetLabel payloads are supported by the management interface,
+ * all of which are preceeded by the nlmsghdr struct.
+ *
+ * o ACK:
+ * Sent by the kernel in response to an applications message, applications
+ * should never send this message.
+ *
+ * +----------------------+-----------------------+
+ * | seq number (32 bits) | return code (32 bits) |
+ * +----------------------+-----------------------+
+ *
+ * seq number: the sequence number of the original message, taken from the
+ * nlmsghdr structure
+ * return code: return value, based on errno values
+ *
+ * o ADD:
+ * Sent by an application to add a domain mapping to the NetLabel system.
+ * The kernel should respond with an ACK.
+ *
+ * +-------------------+
+ * | domains (32 bits) | ...
+ * +-------------------+
+ *
+ * domains: the number of domains in the message
+ *
+ * +--------------------------+-------------------------+
+ * | domain string (variable) | protocol type (32 bits) | ...
+ * +--------------------------+-------------------------+
+ *
+ * +-------------- ---- --- -- -
+ * | mapping data ... repeated
+ * +-------------- ---- --- -- -
+ *
+ * domain string: the domain string, NULL terminated
+ * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
+ * mapping data: specific to the map type (see below)
+ *
+ * NETLBL_NLTYPE_UNLABELED
+ *
+ * No mapping data for this protocol type.
+ *
+ * NETLBL_NLTYPE_CIPSOV4
+ *
+ * +---------------+
+ * | doi (32 bits) |
+ * +---------------+
+ *
+ * doi: the CIPSO DOI value
+ *
+ * o REMOVE:
+ * Sent by an application to remove a domain mapping from the NetLabel
+ * system. The kernel should ACK this message.
+ *
+ * +-------------------+
+ * | domains (32 bits) | ...
+ * +-------------------+
+ *
+ * domains: the number of domains in the message
+ *
+ * +--------------------------+
+ * | domain string (variable) | ...
+ * +--------------------------+
+ *
+ * domain string: the domain string, NULL terminated
+ *
+ * o LIST:
+ * This message can be sent either from an application or by the kernel in
+ * response to an application generated LIST message. When sent by an
+ * application there is no payload. The kernel should respond to a LIST
+ * message either with a LIST message on success or an ACK message on
+ * failure.
+ *
+ * +-------------------+
+ * | domains (32 bits) | ...
+ * +-------------------+
+ *
+ * domains: the number of domains in the message
+ *
+ * +--------------------------+
+ * | domain string (variable) | ...
+ * +--------------------------+
+ *
+ * +-------------------------+-------------- ---- --- -- -
+ * | protocol type (32 bits) | mapping data ... repeated
+ * +-------------------------+-------------- ---- --- -- -
+ *
+ * domain string: the domain string, NULL terminated
+ * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
+ * mapping data: specific to the map type (see below)
+ *
+ * NETLBL_NLTYPE_UNLABELED
+ *
+ * No mapping data for this protocol type.
+ *
+ * NETLBL_NLTYPE_CIPSOV4
+ *
+ * +----------------+---------------+
+ * | type (32 bits) | doi (32 bits) |
+ * +----------------+---------------+
+ *
+ * type: the CIPSO mapping table type (defined in the cipso_ipv4.h header
+ * as CIPSO_V4_MAP_*)
+ * doi: the CIPSO DOI value
+ *
+ * o ADDDEF:
+ * Sent by an application to set the default domain mapping for the NetLabel
+ * system. The kernel should respond with an ACK.
+ *
+ * +-------------------------+-------------- ---- --- -- -
+ * | protocol type (32 bits) | mapping data ... repeated
+ * +-------------------------+-------------- ---- --- -- -
+ *
+ * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
+ * mapping data: specific to the map type (see below)
+ *
+ * NETLBL_NLTYPE_UNLABELED
+ *
+ * No mapping data for this protocol type.
+ *
+ * NETLBL_NLTYPE_CIPSOV4
+ *
+ * +---------------+
+ * | doi (32 bits) |
+ * +---------------+
+ *
+ * doi: the CIPSO DOI value
+ *
+ * o REMOVEDEF:
+ * Sent by an application to remove the default domain mapping from the
+ * NetLabel system, there is no payload. The kernel should ACK this message.
+ *
+ * o LISTDEF:
+ * This message can be sent either from an application or by the kernel in
+ * response to an application generated LISTDEF message. When sent by an
+ * application there is no payload. The kernel should respond to a
+ * LISTDEF message either with a LISTDEF message on success or an ACK message
+ * on failure.
+ *
+ * +-------------------------+-------------- ---- --- -- -
+ * | protocol type (32 bits) | mapping data ... repeated
+ * +-------------------------+-------------- ---- --- -- -
+ *
+ * protocol type: the protocol type (defined by NETLBL_NLTYPE_*)
+ * mapping data: specific to the map type (see below)
+ *
+ * NETLBL_NLTYPE_UNLABELED
+ *
+ * No mapping data for this protocol type.
+ *
+ * NETLBL_NLTYPE_CIPSOV4
+ *
+ * +----------------+---------------+
+ * | type (32 bits) | doi (32 bits) |
+ * +----------------+---------------+
+ *
+ * type: the CIPSO mapping table type (defined in the cipso_ipv4.h header
+ * as CIPSO_V4_MAP_*)
+ * doi: the CIPSO DOI value
+ *
+ * o MODULES:
+ * Sent by an application to request a list of configured NetLabel modules
+ * in the kernel. When sent by an application there is no payload.
+ *
+ * +-------------------+
+ * | modules (32 bits) | ...
+ * +-------------------+
+ *
+ * modules: the number of modules in the message, if this is an application
+ * generated message and the value is zero then return a list of
+ * the configured modules
+ *
+ * +------------------+
+ * | module (32 bits) | ... repeated
+ * +------------------+
+ *
+ * module: the module number as defined by NETLBL_NLTYPE_*
+ *
+ * o VERSION:
+ * Sent by an application to request the NetLabel version string. When sent
+ * by an application there is no payload. This message type is also used by
+ * the kernel to respond to an VERSION request.
+ *
+ * +-------------------+
+ * | version (32 bits) |
+ * +-------------------+
+ *
+ * version: the protocol version number
+ *
+ */
+
+/* NetLabel Management commands */
+enum {
+ NLBL_MGMT_C_UNSPEC,
+ NLBL_MGMT_C_ACK,
+ NLBL_MGMT_C_ADD,
+ NLBL_MGMT_C_REMOVE,
+ NLBL_MGMT_C_LIST,
+ NLBL_MGMT_C_ADDDEF,
+ NLBL_MGMT_C_REMOVEDEF,
+ NLBL_MGMT_C_LISTDEF,
+ NLBL_MGMT_C_MODULES,
+ NLBL_MGMT_C_VERSION,
+ __NLBL_MGMT_C_MAX,
+};
+#define NLBL_MGMT_C_MAX (__NLBL_MGMT_C_MAX - 1)
+
+/* NetLabel protocol functions */
+int netlbl_mgmt_genl_init(void);
+
+#endif
--- /dev/null
+/*
+ * 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
+ *
+ */
+
+#ifndef _NETLABEL_UNLABELED_H
+#define _NETLABEL_UNLABELED_H
+
+#include <net/netlabel.h>
+
+/*
+ * The following NetLabel payloads are supported by the Unlabeled subsystem.
+ *
+ * o ACK:
+ * Sent by the kernel in response to an applications message, applications
+ * should never send this message.
+ *
+ * +----------------------+-----------------------+
+ * | seq number (32 bits) | return code (32 bits) |
+ * +----------------------+-----------------------+
+ *
+ * seq number: the sequence number of the original message, taken from the
+ * nlmsghdr structure
+ * return code: return value, based on errno values
+ *
+ * o ACCEPT
+ * This message is sent from an application to specify if the kernel should
+ * allow unlabled packets to pass if they do not match any of the static
+ * mappings defined in the unlabeled module.
+ *
+ * +-----------------+
+ * | allow (32 bits) |
+ * +-----------------+
+ *
+ * allow: if true (1) then allow the packets to pass, if false (0) then
+ * reject the packets
+ *
+ * o LIST
+ * This message can be sent either from an application or by the kernel in
+ * response to an application generated LIST message. When sent by an
+ * application there is no payload. The kernel should respond to a LIST
+ * message either with a LIST message on success or an ACK message on
+ * failure.
+ *
+ * +-----------------------+
+ * | accept flag (32 bits) |
+ * +-----------------------+
+ *
+ * accept flag: if true (1) then unlabeled packets are allowed to pass,
+ * if false (0) then unlabeled packets are rejected
+ *
+ */
+
+/* NetLabel Unlabeled commands */
+enum {
+ NLBL_UNLABEL_C_UNSPEC,
+ NLBL_UNLABEL_C_ACK,
+ NLBL_UNLABEL_C_ACCEPT,
+ NLBL_UNLABEL_C_LIST,
+ __NLBL_UNLABEL_C_MAX,
+};
+#define NLBL_UNLABEL_C_MAX (__NLBL_UNLABEL_C_MAX - 1)
+
+/* NetLabel protocol functions */
+int netlbl_unlabel_genl_init(void);
+
+/* Process Unlabeled incoming network packets */
+int netlbl_unlabel_getattr(struct netlbl_lsm_secattr *secattr);
+
+/* Set the default configuration to allow Unlabeled packets */
+int netlbl_unlabel_defconf(void);
+
+#endif
--- /dev/null
+/*
+ * NetLabel NETLINK Interface
+ *
+ * This file defines the NETLINK interface 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/init.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/socket.h>
+#include <net/sock.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/netlabel.h>
+#include <asm/bug.h>
+
+#include "netlabel_mgmt.h"
+#include "netlabel_unlabeled.h"
+#include "netlabel_cipso_v4.h"
+#include "netlabel_user.h"
+
+/*
+ * NetLabel NETLINK Setup Functions
+ */
+
+/**
+ * netlbl_netlink_init - Initialize the NETLINK communication channel
+ *
+ * Description:
+ * Call out to the NetLabel components so they can register their families and
+ * commands with the Generic NETLINK mechanism. Returns zero on success and
+ * non-zero on failure.
+ *
+ */
+int netlbl_netlink_init(void)
+{
+ int ret_val;
+
+ ret_val = netlbl_mgmt_genl_init();
+ if (ret_val != 0)
+ return ret_val;
+
+ ret_val = netlbl_cipsov4_genl_init();
+ if (ret_val != 0)
+ return ret_val;
+
+ ret_val = netlbl_unlabel_genl_init();
+ if (ret_val != 0)
+ return ret_val;
+
+ return 0;
+}
+
+/*
+ * NetLabel Common Protocol Functions
+ */
+
+/**
+ * netlbl_netlink_send_ack - Send an ACK message
+ * @info: the generic NETLINK information
+ * @genl_family: the generic NETLINK family ID value
+ * @ack_cmd: the generic NETLINK family ACK command value
+ * @ret_code: return code to use
+ *
+ * Description:
+ * This function sends an ACK message to the sender of the NETLINK message
+ * specified by @info.
+ *
+ */
+void netlbl_netlink_send_ack(const struct genl_info *info,
+ u32 genl_family,
+ u8 ack_cmd,
+ u32 ret_code)
+{
+ size_t data_size;
+ struct sk_buff *skb;
+
+ data_size = GENL_HDRLEN + 2 * NETLBL_LEN_U32;
+ skb = netlbl_netlink_alloc_skb(0, data_size, GFP_KERNEL);
+ if (skb == NULL)
+ return;
+
+ if (netlbl_netlink_hdr_put(skb,
+ info->snd_pid,
+ 0,
+ genl_family,
+ ack_cmd) == NULL)
+ goto send_ack_failure;
+
+ if (nla_put_u32(skb, NLA_U32, info->snd_seq) != 0)
+ goto send_ack_failure;
+ if (nla_put_u32(skb, NLA_U32, ret_code) != 0)
+ goto send_ack_failure;
+
+ netlbl_netlink_snd(skb, info->snd_pid);
+ return;
+
+send_ack_failure:
+ kfree_skb(skb);
+}
+
+/*
+ * NETLINK I/O Functions
+ */
+
+/**
+ * netlbl_netlink_snd - Send a NetLabel message
+ * @skb: NetLabel message
+ * @pid: destination PID
+ *
+ * Description:
+ * Sends a unicast NetLabel message over the NETLINK socket.
+ *
+ */
+int netlbl_netlink_snd(struct sk_buff *skb, u32 pid)
+{
+ return genlmsg_unicast(skb, pid);
+}
+
+/**
+ * netlbl_netlink_snd - Send a NetLabel message
+ * @skb: NetLabel message
+ * @pid: sending PID
+ * @group: multicast group id
+ *
+ * Description:
+ * Sends a multicast NetLabel message over the NETLINK socket to all members
+ * of @group except @pid.
+ *
+ */
+int netlbl_netlink_snd_multicast(struct sk_buff *skb, u32 pid, u32 group)
+{
+ return genlmsg_multicast(skb, pid, group);
+}
--- /dev/null
+/*
+ * NetLabel NETLINK Interface
+ *
+ * This file defines the NETLINK interface 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
+ *
+ */
+
+#ifndef _NETLABEL_USER_H
+#define _NETLABEL_USER_H
+
+#include <linux/skbuff.h>
+#include <linux/capability.h>
+#include <linux/genetlink.h>
+#include <net/netlabel.h>
+#include <net/genetlink.h>
+
+/* NetLabel NETLINK helper functions */
+
+/**
+ * netlbl_netlink_cap_check - Check the NETLINK msg capabilities
+ * @skb: the NETLINK buffer
+ * @req_cap: the required capability
+ *
+ * Description:
+ * Check the NETLINK buffer's capabilities against the required capabilities.
+ * Returns zero on success, negative values on failure.
+ *
+ */
+static inline int netlbl_netlink_cap_check(const struct sk_buff *skb,
+ kernel_cap_t req_cap)
+{
+ if (cap_raised(NETLINK_CB(skb).eff_cap, req_cap))
+ return 0;
+ return -EPERM;
+}
+
+/**
+ * netlbl_getinc_u8 - Read a u8 value from a nlattr stream and move on
+ * @nla: the attribute
+ * @rem_len: remaining length
+ *
+ * Description:
+ * Return a u8 value pointed to by @nla and advance it to the next attribute.
+ *
+ */
+static inline u8 netlbl_getinc_u8(struct nlattr **nla, int *rem_len)
+{
+ u8 val = nla_get_u8(*nla);
+ *nla = nla_next(*nla, rem_len);
+ return val;
+}
+
+/**
+ * netlbl_getinc_u16 - Read a u16 value from a nlattr stream and move on
+ * @nla: the attribute
+ * @rem_len: remaining length
+ *
+ * Description:
+ * Return a u16 value pointed to by @nla and advance it to the next attribute.
+ *
+ */
+static inline u16 netlbl_getinc_u16(struct nlattr **nla, int *rem_len)
+{
+ u16 val = nla_get_u16(*nla);
+ *nla = nla_next(*nla, rem_len);
+ return val;
+}
+
+/**
+ * netlbl_getinc_u32 - Read a u32 value from a nlattr stream and move on
+ * @nla: the attribute
+ * @rem_len: remaining length
+ *
+ * Description:
+ * Return a u32 value pointed to by @nla and advance it to the next attribute.
+ *
+ */
+static inline u32 netlbl_getinc_u32(struct nlattr **nla, int *rem_len)
+{
+ u32 val = nla_get_u32(*nla);
+ *nla = nla_next(*nla, rem_len);
+ return val;
+}
+
+/**
+ * netlbl_netlink_hdr_put - Write the NETLINK buffers into a sk_buff
+ * @skb: the packet
+ * @pid: the PID of the receipient
+ * @seq: the sequence number
+ * @type: the generic NETLINK message family type
+ * @cmd: command
+ *
+ * Description:
+ * Write both a NETLINK nlmsghdr structure and a Generic NETLINK genlmsghdr
+ * struct to the packet. Returns a pointer to the start of the payload buffer
+ * on success or NULL on failure.
+ *
+ */
+static inline void *netlbl_netlink_hdr_put(struct sk_buff *skb,
+ u32 pid,
+ u32 seq,
+ int type,
+ u8 cmd)
+{
+ return genlmsg_put(skb,
+ pid,
+ seq,
+ type,
+ 0,
+ 0,
+ cmd,
+ NETLBL_PROTO_VERSION);
+}
+
+/**
+ * netlbl_netlink_hdr_push - Write the NETLINK buffers into a sk_buff
+ * @skb: the packet
+ * @pid: the PID of the receipient
+ * @seq: the sequence number
+ * @type: the generic NETLINK message family type
+ * @cmd: command
+ *
+ * Description:
+ * Write both a NETLINK nlmsghdr structure and a Generic NETLINK genlmsghdr
+ * struct to the packet.
+ *
+ */
+static inline void netlbl_netlink_hdr_push(struct sk_buff *skb,
+ u32 pid,
+ u32 seq,
+ int type,
+ u8 cmd)
+
+{
+ struct nlmsghdr *nlh;
+ struct genlmsghdr *hdr;
+
+ nlh = (struct nlmsghdr *)skb_push(skb, NLMSG_SPACE(GENL_HDRLEN));
+ nlh->nlmsg_type = type;
+ nlh->nlmsg_len = skb->len;
+ nlh->nlmsg_flags = 0;
+ nlh->nlmsg_pid = pid;
+ nlh->nlmsg_seq = seq;
+
+ hdr = nlmsg_data(nlh);
+ hdr->cmd = cmd;
+ hdr->version = NETLBL_PROTO_VERSION;
+ hdr->reserved = 0;
+}
+
+/**
+ * netlbl_netlink_payload_len - Return the length of the payload
+ * @skb: the NETLINK buffer
+ *
+ * Description:
+ * This function returns the length of the NetLabel payload.
+ *
+ */
+static inline u32 netlbl_netlink_payload_len(const struct sk_buff *skb)
+{
+ return nlmsg_len((struct nlmsghdr *)skb->data) - GENL_HDRLEN;
+}
+
+/**
+ * netlbl_netlink_payload_data - Returns a pointer to the start of the payload
+ * @skb: the NETLINK buffer
+ *
+ * Description:
+ * This function returns a pointer to the start of the NetLabel payload.
+ *
+ */
+static inline void *netlbl_netlink_payload_data(const struct sk_buff *skb)
+{
+ return (unsigned char *)nlmsg_data((struct nlmsghdr *)skb->data) +
+ GENL_HDRLEN;
+}
+
+/* NetLabel common protocol functions */
+
+void netlbl_netlink_send_ack(const struct genl_info *info,
+ u32 genl_family,
+ u8 ack_cmd,
+ u32 ret_code);
+
+/* NetLabel NETLINK I/O functions */
+
+int netlbl_netlink_init(void);
+int netlbl_netlink_snd(struct sk_buff *skb, u32 pid);
+int netlbl_netlink_snd_multicast(struct sk_buff *skb, u32 pid, u32 group);
+
+#endif
projects / linux-2.6-omap-h63xx.git / commitdiff