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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * 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@paul-moore.com>
+ */
+
+/*
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ */
+
+#ifndef _NETLABEL_UNLABELED_H
+#define _NETLABEL_UNLABELED_H
+
+#include <net/netlabel.h>
+
+/*
+ * The following NetLabel payloads are supported by the Unlabeled subsystem.
+ *
+ * o STATICADD
+ * This message is sent from an application to add a new static label for
+ * incoming unlabeled connections.
+ *
+ * Required attributes:
+ *
+ * NLBL_UNLABEL_A_IFACE
+ * NLBL_UNLABEL_A_SECCTX
+ *
+ * If IPv4 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV4ADDR
+ * NLBL_UNLABEL_A_IPV4MASK
+ *
+ * If IPv6 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV6ADDR
+ * NLBL_UNLABEL_A_IPV6MASK
+ *
+ * o STATICREMOVE
+ * This message is sent from an application to remove an existing static
+ * label for incoming unlabeled connections.
+ *
+ * Required attributes:
+ *
+ * NLBL_UNLABEL_A_IFACE
+ *
+ * If IPv4 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV4ADDR
+ * NLBL_UNLABEL_A_IPV4MASK
+ *
+ * If IPv6 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV6ADDR
+ * NLBL_UNLABEL_A_IPV6MASK
+ *
+ * o STATICLIST
+ * This message can be sent either from an application or by the kernel in
+ * response to an application generated STATICLIST message. When sent by an
+ * application there is no payload and the NLM_F_DUMP flag should be set.
+ * The kernel should response with a series of the following messages.
+ *
+ * Required attributes:
+ *
+ * NLBL_UNLABEL_A_IFACE
+ * NLBL_UNLABEL_A_SECCTX
+ *
+ * If IPv4 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV4ADDR
+ * NLBL_UNLABEL_A_IPV4MASK
+ *
+ * If IPv6 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV6ADDR
+ * NLBL_UNLABEL_A_IPV6MASK
+ *
+ * o STATICADDDEF
+ * This message is sent from an application to set the default static
+ * label for incoming unlabeled connections.
+ *
+ * Required attribute:
+ *
+ * NLBL_UNLABEL_A_SECCTX
+ *
+ * If IPv4 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV4ADDR
+ * NLBL_UNLABEL_A_IPV4MASK
+ *
+ * If IPv6 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV6ADDR
+ * NLBL_UNLABEL_A_IPV6MASK
+ *
+ * o STATICREMOVEDEF
+ * This message is sent from an application to remove the existing default
+ * static label for incoming unlabeled connections.
+ *
+ * If IPv4 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV4ADDR
+ * NLBL_UNLABEL_A_IPV4MASK
+ *
+ * If IPv6 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV6ADDR
+ * NLBL_UNLABEL_A_IPV6MASK
+ *
+ * o STATICLISTDEF
+ * This message can be sent either from an application or by the kernel in
+ * response to an application generated STATICLISTDEF message. When sent by
+ * an application there is no payload and the NLM_F_DUMP flag should be set.
+ * The kernel should response with the following message.
+ *
+ * Required attribute:
+ *
+ * NLBL_UNLABEL_A_SECCTX
+ *
+ * If IPv4 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV4ADDR
+ * NLBL_UNLABEL_A_IPV4MASK
+ *
+ * If IPv6 is specified the following attributes are required:
+ *
+ * NLBL_UNLABEL_A_IPV6ADDR
+ * NLBL_UNLABEL_A_IPV6MASK
+ *
+ * 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.
+ *
+ * Required attributes:
+ *
+ * NLBL_UNLABEL_A_ACPTFLG
+ *
+ * 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 with a LIST message on success.
+ *
+ * Required attributes:
+ *
+ * NLBL_UNLABEL_A_ACPTFLG
+ *
+ */
+
+/* NetLabel Unlabeled commands */
+enum {
+ NLBL_UNLABEL_C_UNSPEC,
+ NLBL_UNLABEL_C_ACCEPT,
+ NLBL_UNLABEL_C_LIST,
+ NLBL_UNLABEL_C_STATICADD,
+ NLBL_UNLABEL_C_STATICREMOVE,
+ NLBL_UNLABEL_C_STATICLIST,
+ NLBL_UNLABEL_C_STATICADDDEF,
+ NLBL_UNLABEL_C_STATICREMOVEDEF,
+ NLBL_UNLABEL_C_STATICLISTDEF,
+ __NLBL_UNLABEL_C_MAX,
+};
+
+/* NetLabel Unlabeled attributes */
+enum {
+ NLBL_UNLABEL_A_UNSPEC,
+ NLBL_UNLABEL_A_ACPTFLG,
+ /* (NLA_U8)
+ * if true then unlabeled packets are allowed to pass, else unlabeled
+ * packets are rejected */
+ NLBL_UNLABEL_A_IPV6ADDR,
+ /* (NLA_BINARY, struct in6_addr)
+ * an IPv6 address */
+ NLBL_UNLABEL_A_IPV6MASK,
+ /* (NLA_BINARY, struct in6_addr)
+ * an IPv6 address mask */
+ NLBL_UNLABEL_A_IPV4ADDR,
+ /* (NLA_BINARY, struct in_addr)
+ * an IPv4 address */
+ NLBL_UNLABEL_A_IPV4MASK,
+ /* (NLA_BINARY, struct in_addr)
+ * and IPv4 address mask */
+ NLBL_UNLABEL_A_IFACE,
+ /* (NLA_NULL_STRING)
+ * network interface */
+ NLBL_UNLABEL_A_SECCTX,
+ /* (NLA_BINARY)
+ * a LSM specific security context */
+ __NLBL_UNLABEL_A_MAX,
+};
+#define NLBL_UNLABEL_A_MAX (__NLBL_UNLABEL_A_MAX - 1)
+
+/* NetLabel protocol functions */
+int netlbl_unlabel_genl_init(void);
+
+/* Unlabeled connection hash table size */
+/* XXX - currently this number is an uneducated guess */
+#define NETLBL_UNLHSH_BITSIZE 7
+
+/* General Unlabeled init function */
+int netlbl_unlabel_init(u32 size);
+
+/* Static/Fallback label management functions */
+int netlbl_unlhsh_add(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u32 addr_len,
+ u32 secid,
+ struct netlbl_audit *audit_info);
+int netlbl_unlhsh_remove(struct net *net,
+ const char *dev_name,
+ const void *addr,
+ const void *mask,
+ u32 addr_len,
+ struct netlbl_audit *audit_info);
+
+/* Process Unlabeled incoming network packets */
+int netlbl_unlabel_getattr(const struct sk_buff *skb,
+ u16 family,
+ struct netlbl_lsm_secattr *secattr);
+
+/* Set the default configuration to allow Unlabeled packets */
+int netlbl_unlabel_defconf(void);
+
+#endif