#include <linux/socket.h>
#include <linux/string.h>
#include <linux/skbuff.h>
+#include <linux/audit.h>
#include <net/sock.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include "netlabel_unlabeled.h"
/* Accept unlabeled packets flag */
-static atomic_t netlabel_unlabel_accept_flg = ATOMIC_INIT(0);
+static DEFINE_SPINLOCK(netlabel_unlabel_acceptflg_lock);
+static u8 netlabel_unlabel_acceptflg = 0;
/* NetLabel Generic NETLINK CIPSOv4 family */
static struct genl_family netlbl_unlabel_gnl_family = {
.hdrsize = 0,
.name = NETLBL_NLTYPE_UNLABELED_NAME,
.version = NETLBL_PROTO_VERSION,
- .maxattr = 0,
+ .maxattr = NLBL_UNLABEL_A_MAX,
};
+/* NetLabel Netlink attribute policy */
+static struct nla_policy netlbl_unlabel_genl_policy[NLBL_UNLABEL_A_MAX + 1] = {
+ [NLBL_UNLABEL_A_ACPTFLG] = { .type = NLA_U8 },
+};
+
+/*
+ * Helper Functions
+ */
+
+/**
+ * netlbl_unlabel_acceptflg_set - Set the unlabeled accept flag
+ * @value: desired value
+ * @audit_info: NetLabel audit information
+ *
+ * Description:
+ * Set the value of the unlabeled accept flag to @value.
+ *
+ */
+static void netlbl_unlabel_acceptflg_set(u8 value,
+ struct netlbl_audit *audit_info)
+{
+ struct audit_buffer *audit_buf;
+ u8 old_val;
+
+ rcu_read_lock();
+ old_val = netlabel_unlabel_acceptflg;
+ spin_lock(&netlabel_unlabel_acceptflg_lock);
+ netlabel_unlabel_acceptflg = value;
+ spin_unlock(&netlabel_unlabel_acceptflg_lock);
+ rcu_read_unlock();
+
+ audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_ALLOW,
+ audit_info);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " unlbl_accept=%u old=%u", value, old_val);
+ audit_log_end(audit_buf);
+ }
+}
/*
* NetLabel Command Handlers
*/
static int netlbl_unlabel_accept(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val;
- struct nlattr *data = netlbl_netlink_payload_data(skb);
- u32 value;
+ u8 value;
+ struct netlbl_audit audit_info;
- ret_val = netlbl_netlink_cap_check(skb, CAP_NET_ADMIN);
- if (ret_val != 0)
- return ret_val;
-
- if (netlbl_netlink_payload_len(skb) == NETLBL_LEN_U32) {
- value = nla_get_u32(data);
+ if (info->attrs[NLBL_UNLABEL_A_ACPTFLG]) {
+ value = nla_get_u8(info->attrs[NLBL_UNLABEL_A_ACPTFLG]);
if (value == 1 || value == 0) {
- atomic_set(&netlabel_unlabel_accept_flg, value);
- netlbl_netlink_send_ack(info,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_ACK,
- NETLBL_E_OK);
+ netlbl_netlink_auditinfo(skb, &audit_info);
+ netlbl_unlabel_acceptflg_set(value, &audit_info);
return 0;
}
}
- netlbl_netlink_send_ack(info,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_ACK,
- EINVAL);
return -EINVAL;
}
*/
static int netlbl_unlabel_list(struct sk_buff *skb, struct genl_info *info)
{
- int ret_val = -ENOMEM;
+ int ret_val = -EINVAL;
struct sk_buff *ans_skb;
+ void *data;
- ans_skb = netlbl_netlink_alloc_skb(0,
- GENL_HDRLEN + NETLBL_LEN_U32,
- GFP_KERNEL);
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (ans_skb == NULL)
goto list_failure;
-
- if (netlbl_netlink_hdr_put(ans_skb,
- info->snd_pid,
- 0,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_LIST) == NULL)
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_unlabel_gnl_family,
+ 0, NLBL_UNLABEL_C_LIST);
+ if (data == NULL) {
+ ret_val = -ENOMEM;
goto list_failure;
+ }
- ret_val = nla_put_u32(ans_skb,
- NLA_U32,
- atomic_read(&netlabel_unlabel_accept_flg));
+ rcu_read_lock();
+ ret_val = nla_put_u8(ans_skb,
+ NLBL_UNLABEL_A_ACPTFLG,
+ netlabel_unlabel_acceptflg);
+ rcu_read_unlock();
if (ret_val != 0)
goto list_failure;
- ret_val = netlbl_netlink_snd(ans_skb, info->snd_pid);
+ genlmsg_end(ans_skb, data);
+
+ ret_val = genlmsg_reply(ans_skb, info);
if (ret_val != 0)
goto list_failure;
-
return 0;
list_failure:
- netlbl_netlink_send_ack(info,
- netlbl_unlabel_gnl_family.id,
- NLBL_UNLABEL_C_ACK,
- -ret_val);
+ kfree(ans_skb);
return ret_val;
}
static struct genl_ops netlbl_unlabel_genl_c_accept = {
.cmd = NLBL_UNLABEL_C_ACCEPT,
- .flags = 0,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_unlabel_genl_policy,
.doit = netlbl_unlabel_accept,
.dumpit = NULL,
};
static struct genl_ops netlbl_unlabel_genl_c_list = {
.cmd = NLBL_UNLABEL_C_LIST,
.flags = 0,
+ .policy = netlbl_unlabel_genl_policy,
.doit = netlbl_unlabel_list,
.dumpit = NULL,
};
*/
int netlbl_unlabel_getattr(struct netlbl_lsm_secattr *secattr)
{
- if (atomic_read(&netlabel_unlabel_accept_flg) == 1) {
- memset(secattr, 0, sizeof(*secattr));
- return 0;
- }
+ int ret_val;
- return -ENOMSG;
+ rcu_read_lock();
+ if (netlabel_unlabel_acceptflg == 1) {
+ netlbl_secattr_init(secattr);
+ ret_val = 0;
+ } else
+ ret_val = -ENOMSG;
+ rcu_read_unlock();
+
+ return ret_val;
}
/**
{
int ret_val;
struct netlbl_dom_map *entry;
+ struct netlbl_audit audit_info;
+
+ /* Only the kernel is allowed to call this function and the only time
+ * it is called is at bootup before the audit subsystem is reporting
+ * messages so don't worry to much about these values. */
+ security_task_getsecid(current, &audit_info.secid);
+ audit_info.loginuid = 0;
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (entry == NULL)
return -ENOMEM;
entry->type = NETLBL_NLTYPE_UNLABELED;
- ret_val = netlbl_domhsh_add_default(entry);
+ ret_val = netlbl_domhsh_add_default(entry, &audit_info);
if (ret_val != 0)
return ret_val;
- atomic_set(&netlabel_unlabel_accept_flg, 1);
+ netlbl_unlabel_acceptflg_set(1, &audit_info);
return 0;
}
git.openpandora.org / pandora-kernel.git / blobdiff