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Diffstat (limited to 'net/netlabel/netlabel_mgmt.c')
-rw-r--r--net/netlabel/netlabel_mgmt.c398
1 files changed, 304 insertions, 94 deletions
diff --git a/net/netlabel/netlabel_mgmt.c b/net/netlabel/netlabel_mgmt.c
index c4e18c7bc0c1..ee769ecaa13c 100644
--- a/net/netlabel/netlabel_mgmt.c
+++ b/net/netlabel/netlabel_mgmt.c
@@ -10,7 +10,7 @@
*/
/*
- * (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
@@ -32,9 +32,13 @@
#include <linux/socket.h>
#include <linux/string.h>
#include <linux/skbuff.h>
+#include <linux/in.h>
+#include <linux/in6.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/genetlink.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <asm/atomic.h>
@@ -71,80 +75,337 @@ static const struct nla_policy netlbl_mgmt_genl_policy[NLBL_MGMT_A_MAX + 1] = {
};
/*
- * NetLabel Command Handlers
+ * Helper Functions
*/
/**
* netlbl_mgmt_add - Handle an ADD message
- * @skb: the NETLINK buffer
* @info: the Generic NETLINK info block
+ * @audit_info: NetLabel audit information
*
* 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.
+ * Helper function for the ADD and ADDDEF messages to add the domain mappings
+ * 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)
+static int netlbl_mgmt_add_common(struct genl_info *info,
+ struct netlbl_audit *audit_info)
{
int ret_val = -EINVAL;
struct netlbl_dom_map *entry = NULL;
- size_t tmp_size;
+ struct netlbl_domaddr_map *addrmap = NULL;
+ struct cipso_v4_doi *cipsov4 = NULL;
u32 tmp_val;
- struct netlbl_audit audit_info;
-
- if (!info->attrs[NLBL_MGMT_A_DOMAIN] ||
- !info->attrs[NLBL_MGMT_A_PROTOCOL])
- goto add_failure;
-
- netlbl_netlink_auditinfo(skb, &audit_info);
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (entry == NULL) {
ret_val = -ENOMEM;
goto add_failure;
}
- tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
- entry->domain = kmalloc(tmp_size, GFP_KERNEL);
- if (entry->domain == NULL) {
- ret_val = -ENOMEM;
- goto add_failure;
- }
entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
- nla_strlcpy(entry->domain, info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
+ if (info->attrs[NLBL_MGMT_A_DOMAIN]) {
+ size_t tmp_size = nla_len(info->attrs[NLBL_MGMT_A_DOMAIN]);
+ entry->domain = kmalloc(tmp_size, GFP_KERNEL);
+ if (entry->domain == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ nla_strlcpy(entry->domain,
+ info->attrs[NLBL_MGMT_A_DOMAIN], tmp_size);
+ }
+
+ /* NOTE: internally we allow/use a entry->type value of
+ * NETLBL_NLTYPE_ADDRSELECT but we don't currently allow users
+ * to pass that as a protocol value because we need to know the
+ * "real" protocol */
switch (entry->type) {
case NETLBL_NLTYPE_UNLABELED:
- ret_val = netlbl_domhsh_add(entry, &audit_info);
break;
case NETLBL_NLTYPE_CIPSOV4:
if (!info->attrs[NLBL_MGMT_A_CV4DOI])
goto add_failure;
tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
- entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
- if (entry->type_def.cipsov4 == NULL)
+ cipsov4 = cipso_v4_doi_getdef(tmp_val);
+ if (cipsov4 == NULL)
goto add_failure;
- ret_val = netlbl_domhsh_add(entry, &audit_info);
- if (ret_val != 0)
- cipso_v4_doi_putdef(entry->type_def.cipsov4);
+ entry->type_def.cipsov4 = cipsov4;
break;
default:
goto add_failure;
}
+
+ if (info->attrs[NLBL_MGMT_A_IPV4ADDR]) {
+ struct in_addr *addr;
+ struct in_addr *mask;
+ struct netlbl_domaddr4_map *map;
+
+ addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
+ if (addrmap == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ INIT_LIST_HEAD(&addrmap->list4);
+ INIT_LIST_HEAD(&addrmap->list6);
+
+ if (nla_len(info->attrs[NLBL_MGMT_A_IPV4ADDR]) !=
+ sizeof(struct in_addr)) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ if (nla_len(info->attrs[NLBL_MGMT_A_IPV4MASK]) !=
+ sizeof(struct in_addr)) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ addr = nla_data(info->attrs[NLBL_MGMT_A_IPV4ADDR]);
+ mask = nla_data(info->attrs[NLBL_MGMT_A_IPV4MASK]);
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (map == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ map->list.addr = addr->s_addr & mask->s_addr;
+ map->list.mask = mask->s_addr;
+ map->list.valid = 1;
+ map->type = entry->type;
+ if (cipsov4)
+ map->type_def.cipsov4 = cipsov4;
+
+ ret_val = netlbl_af4list_add(&map->list, &addrmap->list4);
+ if (ret_val != 0) {
+ kfree(map);
+ goto add_failure;
+ }
+
+ entry->type = NETLBL_NLTYPE_ADDRSELECT;
+ entry->type_def.addrsel = addrmap;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ } else if (info->attrs[NLBL_MGMT_A_IPV6ADDR]) {
+ struct in6_addr *addr;
+ struct in6_addr *mask;
+ struct netlbl_domaddr6_map *map;
+
+ addrmap = kzalloc(sizeof(*addrmap), GFP_KERNEL);
+ if (addrmap == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ INIT_LIST_HEAD(&addrmap->list4);
+ INIT_LIST_HEAD(&addrmap->list6);
+
+ if (nla_len(info->attrs[NLBL_MGMT_A_IPV6ADDR]) !=
+ sizeof(struct in6_addr)) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ if (nla_len(info->attrs[NLBL_MGMT_A_IPV6MASK]) !=
+ sizeof(struct in6_addr)) {
+ ret_val = -EINVAL;
+ goto add_failure;
+ }
+ addr = nla_data(info->attrs[NLBL_MGMT_A_IPV6ADDR]);
+ mask = nla_data(info->attrs[NLBL_MGMT_A_IPV6MASK]);
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (map == NULL) {
+ ret_val = -ENOMEM;
+ goto add_failure;
+ }
+ ipv6_addr_copy(&map->list.addr, addr);
+ map->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
+ map->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
+ map->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
+ map->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
+ ipv6_addr_copy(&map->list.mask, mask);
+ map->list.valid = 1;
+ map->type = entry->type;
+
+ ret_val = netlbl_af6list_add(&map->list, &addrmap->list6);
+ if (ret_val != 0) {
+ kfree(map);
+ goto add_failure;
+ }
+
+ entry->type = NETLBL_NLTYPE_ADDRSELECT;
+ entry->type_def.addrsel = addrmap;
+#endif /* IPv6 */
+ }
+
+ ret_val = netlbl_domhsh_add(entry, audit_info);
if (ret_val != 0)
goto add_failure;
return 0;
add_failure:
+ if (cipsov4)
+ cipso_v4_doi_putdef(cipsov4);
if (entry)
kfree(entry->domain);
+ kfree(addrmap);
kfree(entry);
return ret_val;
}
/**
+ * netlbl_mgmt_listentry - List a NetLabel/LSM domain map entry
+ * @skb: the NETLINK buffer
+ * @entry: the map entry
+ *
+ * Description:
+ * This function is a helper function used by the LISTALL and LISTDEF command
+ * handlers. The caller is responsibile for ensuring that the RCU read lock
+ * is held. Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_mgmt_listentry(struct sk_buff *skb,
+ struct netlbl_dom_map *entry)
+{
+ int ret_val;
+ struct nlattr *nla_a;
+ struct nlattr *nla_b;
+ struct netlbl_af4list *iter4;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ struct netlbl_af6list *iter6;
+#endif
+
+ if (entry->domain != NULL) {
+ ret_val = nla_put_string(skb,
+ NLBL_MGMT_A_DOMAIN, entry->domain);
+ if (ret_val != 0)
+ return ret_val;
+ }
+
+ switch (entry->type) {
+ case NETLBL_NLTYPE_ADDRSELECT:
+ nla_a = nla_nest_start(skb, NLBL_MGMT_A_SELECTORLIST);
+ if (nla_a == NULL)
+ return -ENOMEM;
+
+ netlbl_af4list_foreach_rcu(iter4,
+ &entry->type_def.addrsel->list4) {
+ struct netlbl_domaddr4_map *map4;
+ struct in_addr addr_struct;
+
+ nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
+ if (nla_b == NULL)
+ return -ENOMEM;
+
+ addr_struct.s_addr = iter4->addr;
+ ret_val = nla_put(skb, NLBL_MGMT_A_IPV4ADDR,
+ sizeof(struct in_addr),
+ &addr_struct);
+ if (ret_val != 0)
+ return ret_val;
+ addr_struct.s_addr = iter4->mask;
+ ret_val = nla_put(skb, NLBL_MGMT_A_IPV4MASK,
+ sizeof(struct in_addr),
+ &addr_struct);
+ if (ret_val != 0)
+ return ret_val;
+ map4 = netlbl_domhsh_addr4_entry(iter4);
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
+ map4->type);
+ if (ret_val != 0)
+ return ret_val;
+ switch (map4->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
+ map4->type_def.cipsov4->doi);
+ if (ret_val != 0)
+ return ret_val;
+ break;
+ }
+
+ nla_nest_end(skb, nla_b);
+ }
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ netlbl_af6list_foreach_rcu(iter6,
+ &entry->type_def.addrsel->list6) {
+ struct netlbl_domaddr6_map *map6;
+
+ nla_b = nla_nest_start(skb, NLBL_MGMT_A_ADDRSELECTOR);
+ if (nla_b == NULL)
+ return -ENOMEM;
+
+ ret_val = nla_put(skb, NLBL_MGMT_A_IPV6ADDR,
+ sizeof(struct in6_addr),
+ &iter6->addr);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = nla_put(skb, NLBL_MGMT_A_IPV6MASK,
+ sizeof(struct in6_addr),
+ &iter6->mask);
+ if (ret_val != 0)
+ return ret_val;
+ map6 = netlbl_domhsh_addr6_entry(iter6);
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL,
+ map6->type);
+ if (ret_val != 0)
+ return ret_val;
+
+ nla_nest_end(skb, nla_b);
+ }
+#endif /* IPv6 */
+
+ nla_nest_end(skb, nla_a);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
+ break;
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_PROTOCOL, entry->type);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = nla_put_u32(skb, NLBL_MGMT_A_CV4DOI,
+ entry->type_def.cipsov4->doi);
+ break;
+ }
+
+ return ret_val;
+}
+
+/*
+ * 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)
+{
+ struct netlbl_audit audit_info;
+
+ if ((!info->attrs[NLBL_MGMT_A_DOMAIN]) ||
+ (!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
+ (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
+ info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
+ (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
+ info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
+ ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
+ (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
+ ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
+ (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
+ return -EINVAL;
+
+ netlbl_netlink_auditinfo(skb, &audit_info);
+
+ return netlbl_mgmt_add_common(info, &audit_info);
+}
+
+/**
* netlbl_mgmt_remove - Handle a REMOVE message
* @skb: the NETLINK buffer
* @info: the Generic NETLINK info block
@@ -192,23 +453,9 @@ static int netlbl_mgmt_listall_cb(struct netlbl_dom_map *entry, void *arg)
if (data == NULL)
goto listall_cb_failure;
- ret_val = nla_put_string(cb_arg->skb,
- NLBL_MGMT_A_DOMAIN,
- entry->domain);
+ ret_val = netlbl_mgmt_listentry(cb_arg->skb, entry);
if (ret_val != 0)
goto listall_cb_failure;
- ret_val = nla_put_u32(cb_arg->skb, NLBL_MGMT_A_PROTOCOL, entry->type);
- if (ret_val != 0)
- goto listall_cb_failure;
- switch (entry->type) {
- case NETLBL_NLTYPE_CIPSOV4:
- ret_val = nla_put_u32(cb_arg->skb,
- NLBL_MGMT_A_CV4DOI,
- entry->type_def.cipsov4->doi);
- if (ret_val != 0)
- goto listall_cb_failure;
- break;
- }
cb_arg->seq++;
return genlmsg_end(cb_arg->skb, data);
@@ -262,50 +509,22 @@ static int netlbl_mgmt_listall(struct sk_buff *skb,
*/
static int netlbl_mgmt_adddef(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val = -EINVAL;
- struct netlbl_dom_map *entry = NULL;
- u32 tmp_val;
struct netlbl_audit audit_info;
- if (!info->attrs[NLBL_MGMT_A_PROTOCOL])
- goto adddef_failure;
+ if ((!info->attrs[NLBL_MGMT_A_PROTOCOL]) ||
+ (info->attrs[NLBL_MGMT_A_IPV4ADDR] &&
+ info->attrs[NLBL_MGMT_A_IPV6ADDR]) ||
+ (info->attrs[NLBL_MGMT_A_IPV4MASK] &&
+ info->attrs[NLBL_MGMT_A_IPV6MASK]) ||
+ ((info->attrs[NLBL_MGMT_A_IPV4ADDR] != NULL) ^
+ (info->attrs[NLBL_MGMT_A_IPV4MASK] != NULL)) ||
+ ((info->attrs[NLBL_MGMT_A_IPV6ADDR] != NULL) ^
+ (info->attrs[NLBL_MGMT_A_IPV6MASK] != NULL)))
+ return -EINVAL;
netlbl_netlink_auditinfo(skb, &audit_info);
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (entry == NULL) {
- ret_val = -ENOMEM;
- goto adddef_failure;
- }
- entry->type = nla_get_u32(info->attrs[NLBL_MGMT_A_PROTOCOL]);
-
- switch (entry->type) {
- case NETLBL_NLTYPE_UNLABELED:
- ret_val = netlbl_domhsh_add_default(entry, &audit_info);
- break;
- case NETLBL_NLTYPE_CIPSOV4:
- if (!info->attrs[NLBL_MGMT_A_CV4DOI])
- goto adddef_failure;
-
- tmp_val = nla_get_u32(info->attrs[NLBL_MGMT_A_CV4DOI]);
- entry->type_def.cipsov4 = cipso_v4_doi_getdef(tmp_val);
- if (entry->type_def.cipsov4 == NULL)
- goto adddef_failure;
- ret_val = netlbl_domhsh_add_default(entry, &audit_info);
- if (ret_val != 0)
- cipso_v4_doi_putdef(entry->type_def.cipsov4);
- break;
- default:
- goto adddef_failure;
- }
- if (ret_val != 0)
- goto adddef_failure;
-
- return 0;
-
-adddef_failure:
- kfree(entry);
- return ret_val;
+ return netlbl_mgmt_add_common(info, &audit_info);
}
/**
@@ -359,19 +578,10 @@ static int netlbl_mgmt_listdef(struct sk_buff *skb, struct genl_info *info)
ret_val = -ENOENT;
goto listdef_failure_lock;
}
- ret_val = nla_put_u32(ans_skb, NLBL_MGMT_A_PROTOCOL, entry->type);
- if (ret_val != 0)
- goto listdef_failure_lock;
- switch (entry->type) {
- case NETLBL_NLTYPE_CIPSOV4:
- ret_val = nla_put_u32(ans_skb,
- NLBL_MGMT_A_CV4DOI,
- entry->type_def.cipsov4->doi);
- if (ret_val != 0)
- goto listdef_failure_lock;
- break;
- }
+ ret_val = netlbl_mgmt_listentry(ans_skb, entry);
rcu_read_unlock();
+ if (ret_val != 0)
+ goto listdef_failure;
genlmsg_end(ans_skb, data);
return genlmsg_reply(ans_skb, info);