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-rw-r--r--include/net/xfrm.h2080
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diff --git a/include/net/xfrm.h b/include/net/xfrm.h
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+++ b/include/net/xfrm.h
@@ -0,0 +1,2080 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _NET_XFRM_H
+#define _NET_XFRM_H
+
+#include <linux/compiler.h>
+#include <linux/xfrm.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/pfkeyv2.h>
+#include <linux/ipsec.h>
+#include <linux/in6.h>
+#include <linux/mutex.h>
+#include <linux/audit.h>
+#include <linux/slab.h>
+#include <linux/refcount.h>
+#include <linux/sockptr.h>
+
+#include <net/sock.h>
+#include <net/dst.h>
+#include <net/ip.h>
+#include <net/route.h>
+#include <net/ipv6.h>
+#include <net/ip6_fib.h>
+#include <net/flow.h>
+#include <net/gro_cells.h>
+
+#include <linux/interrupt.h>
+
+#ifdef CONFIG_XFRM_STATISTICS
+#include <net/snmp.h>
+#endif
+
+#define XFRM_PROTO_ESP 50
+#define XFRM_PROTO_AH 51
+#define XFRM_PROTO_COMP 108
+#define XFRM_PROTO_IPIP 4
+#define XFRM_PROTO_IPV6 41
+#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
+#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
+
+#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
+#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
+#define MODULE_ALIAS_XFRM_MODE(family, encap) \
+ MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
+#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
+ MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
+#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
+ MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
+
+#ifdef CONFIG_XFRM_STATISTICS
+#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
+#else
+#define XFRM_INC_STATS(net, field) ((void)(net))
+#endif
+
+
+/* Organization of SPD aka "XFRM rules"
+ ------------------------------------
+
+ Basic objects:
+ - policy rule, struct xfrm_policy (=SPD entry)
+ - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
+ - instance of a transformer, struct xfrm_state (=SA)
+ - template to clone xfrm_state, struct xfrm_tmpl
+
+ SPD is plain linear list of xfrm_policy rules, ordered by priority.
+ (To be compatible with existing pfkeyv2 implementations,
+ many rules with priority of 0x7fffffff are allowed to exist and
+ such rules are ordered in an unpredictable way, thanks to bsd folks.)
+
+ Lookup is plain linear search until the first match with selector.
+
+ If "action" is "block", then we prohibit the flow, otherwise:
+ if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
+ policy entry has list of up to XFRM_MAX_DEPTH transformations,
+ described by templates xfrm_tmpl. Each template is resolved
+ to a complete xfrm_state (see below) and we pack bundle of transformations
+ to a dst_entry returned to requestor.
+
+ dst -. xfrm .-> xfrm_state #1
+ |---. child .-> dst -. xfrm .-> xfrm_state #2
+ |---. child .-> dst -. xfrm .-> xfrm_state #3
+ |---. child .-> NULL
+
+ Bundles are cached at xrfm_policy struct (field ->bundles).
+
+
+ Resolution of xrfm_tmpl
+ -----------------------
+ Template contains:
+ 1. ->mode Mode: transport or tunnel
+ 2. ->id.proto Protocol: AH/ESP/IPCOMP
+ 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
+ Q: allow to resolve security gateway?
+ 4. ->id.spi If not zero, static SPI.
+ 5. ->saddr Local tunnel endpoint, ignored for transport mode.
+ 6. ->algos List of allowed algos. Plain bitmask now.
+ Q: ealgos, aalgos, calgos. What a mess...
+ 7. ->share Sharing mode.
+ Q: how to implement private sharing mode? To add struct sock* to
+ flow id?
+
+ Having this template we search through SAD searching for entries
+ with appropriate mode/proto/algo, permitted by selector.
+ If no appropriate entry found, it is requested from key manager.
+
+ PROBLEMS:
+ Q: How to find all the bundles referring to a physical path for
+ PMTU discovery? Seems, dst should contain list of all parents...
+ and enter to infinite locking hierarchy disaster.
+ No! It is easier, we will not search for them, let them find us.
+ We add genid to each dst plus pointer to genid of raw IP route,
+ pmtu disc will update pmtu on raw IP route and increase its genid.
+ dst_check() will see this for top level and trigger resyncing
+ metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
+ */
+
+struct xfrm_state_walk {
+ struct list_head all;
+ u8 state;
+ u8 dying;
+ u8 proto;
+ u32 seq;
+ struct xfrm_address_filter *filter;
+};
+
+struct xfrm_state_offload {
+ struct net_device *dev;
+ struct net_device *real_dev;
+ unsigned long offload_handle;
+ unsigned int num_exthdrs;
+ u8 flags;
+};
+
+struct xfrm_mode {
+ u8 encap;
+ u8 family;
+ u8 flags;
+};
+
+/* Flags for xfrm_mode. */
+enum {
+ XFRM_MODE_FLAG_TUNNEL = 1,
+};
+
+/* Full description of state of transformer. */
+struct xfrm_state {
+ possible_net_t xs_net;
+ union {
+ struct hlist_node gclist;
+ struct hlist_node bydst;
+ };
+ struct hlist_node bysrc;
+ struct hlist_node byspi;
+
+ refcount_t refcnt;
+ spinlock_t lock;
+
+ struct xfrm_id id;
+ struct xfrm_selector sel;
+ struct xfrm_mark mark;
+ u32 if_id;
+ u32 tfcpad;
+
+ u32 genid;
+
+ /* Key manager bits */
+ struct xfrm_state_walk km;
+
+ /* Parameters of this state. */
+ struct {
+ u32 reqid;
+ u8 mode;
+ u8 replay_window;
+ u8 aalgo, ealgo, calgo;
+ u8 flags;
+ u16 family;
+ xfrm_address_t saddr;
+ int header_len;
+ int trailer_len;
+ u32 extra_flags;
+ struct xfrm_mark smark;
+ } props;
+
+ struct xfrm_lifetime_cfg lft;
+
+ /* Data for transformer */
+ struct xfrm_algo_auth *aalg;
+ struct xfrm_algo *ealg;
+ struct xfrm_algo *calg;
+ struct xfrm_algo_aead *aead;
+ const char *geniv;
+
+ /* mapping change rate limiting */
+ __be16 new_mapping_sport;
+ u32 new_mapping; /* seconds */
+ u32 mapping_maxage; /* seconds for input SA */
+
+ /* Data for encapsulator */
+ struct xfrm_encap_tmpl *encap;
+ struct sock __rcu *encap_sk;
+
+ /* Data for care-of address */
+ xfrm_address_t *coaddr;
+
+ /* IPComp needs an IPIP tunnel for handling uncompressed packets */
+ struct xfrm_state *tunnel;
+
+ /* If a tunnel, number of users + 1 */
+ atomic_t tunnel_users;
+
+ /* State for replay detection */
+ struct xfrm_replay_state replay;
+ struct xfrm_replay_state_esn *replay_esn;
+
+ /* Replay detection state at the time we sent the last notification */
+ struct xfrm_replay_state preplay;
+ struct xfrm_replay_state_esn *preplay_esn;
+
+ /* The functions for replay detection. */
+ const struct xfrm_replay *repl;
+
+ /* internal flag that only holds state for delayed aevent at the
+ * moment
+ */
+ u32 xflags;
+
+ /* Replay detection notification settings */
+ u32 replay_maxage;
+ u32 replay_maxdiff;
+
+ /* Replay detection notification timer */
+ struct timer_list rtimer;
+
+ /* Statistics */
+ struct xfrm_stats stats;
+
+ struct xfrm_lifetime_cur curlft;
+ struct hrtimer mtimer;
+
+ struct xfrm_state_offload xso;
+
+ /* used to fix curlft->add_time when changing date */
+ long saved_tmo;
+
+ /* Last used time */
+ time64_t lastused;
+
+ struct page_frag xfrag;
+
+ /* Reference to data common to all the instances of this
+ * transformer. */
+ const struct xfrm_type *type;
+ struct xfrm_mode inner_mode;
+ struct xfrm_mode inner_mode_iaf;
+ struct xfrm_mode outer_mode;
+
+ const struct xfrm_type_offload *type_offload;
+
+ /* Security context */
+ struct xfrm_sec_ctx *security;
+
+ /* Private data of this transformer, format is opaque,
+ * interpreted by xfrm_type methods. */
+ void *data;
+};
+
+static inline struct net *xs_net(struct xfrm_state *x)
+{
+ return read_pnet(&x->xs_net);
+}
+
+/* xflags - make enum if more show up */
+#define XFRM_TIME_DEFER 1
+#define XFRM_SOFT_EXPIRE 2
+
+enum {
+ XFRM_STATE_VOID,
+ XFRM_STATE_ACQ,
+ XFRM_STATE_VALID,
+ XFRM_STATE_ERROR,
+ XFRM_STATE_EXPIRED,
+ XFRM_STATE_DEAD
+};
+
+/* callback structure passed from either netlink or pfkey */
+struct km_event {
+ union {
+ u32 hard;
+ u32 proto;
+ u32 byid;
+ u32 aevent;
+ u32 type;
+ } data;
+
+ u32 seq;
+ u32 portid;
+ u32 event;
+ struct net *net;
+};
+
+struct xfrm_replay {
+ void (*advance)(struct xfrm_state *x, __be32 net_seq);
+ int (*check)(struct xfrm_state *x,
+ struct sk_buff *skb,
+ __be32 net_seq);
+ int (*recheck)(struct xfrm_state *x,
+ struct sk_buff *skb,
+ __be32 net_seq);
+ void (*notify)(struct xfrm_state *x, int event);
+ int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
+};
+
+struct xfrm_if_cb {
+ struct xfrm_if *(*decode_session)(struct sk_buff *skb,
+ unsigned short family);
+};
+
+void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
+void xfrm_if_unregister_cb(void);
+
+struct net_device;
+struct xfrm_type;
+struct xfrm_dst;
+struct xfrm_policy_afinfo {
+ struct dst_ops *dst_ops;
+ struct dst_entry *(*dst_lookup)(struct net *net,
+ int tos, int oif,
+ const xfrm_address_t *saddr,
+ const xfrm_address_t *daddr,
+ u32 mark);
+ int (*get_saddr)(struct net *net, int oif,
+ xfrm_address_t *saddr,
+ xfrm_address_t *daddr,
+ u32 mark);
+ int (*fill_dst)(struct xfrm_dst *xdst,
+ struct net_device *dev,
+ const struct flowi *fl);
+ struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
+};
+
+int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
+void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
+void km_policy_notify(struct xfrm_policy *xp, int dir,
+ const struct km_event *c);
+void km_state_notify(struct xfrm_state *x, const struct km_event *c);
+
+struct xfrm_tmpl;
+int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
+ struct xfrm_policy *pol);
+void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
+int __xfrm_state_delete(struct xfrm_state *x);
+
+struct xfrm_state_afinfo {
+ u8 family;
+ u8 proto;
+
+ const struct xfrm_type_offload *type_offload_esp;
+
+ const struct xfrm_type *type_esp;
+ const struct xfrm_type *type_ipip;
+ const struct xfrm_type *type_ipip6;
+ const struct xfrm_type *type_comp;
+ const struct xfrm_type *type_ah;
+ const struct xfrm_type *type_routing;
+ const struct xfrm_type *type_dstopts;
+
+ int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
+ int (*transport_finish)(struct sk_buff *skb,
+ int async);
+ void (*local_error)(struct sk_buff *skb, u32 mtu);
+};
+
+int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
+int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
+struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
+struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
+
+struct xfrm_input_afinfo {
+ u8 family;
+ bool is_ipip;
+ int (*callback)(struct sk_buff *skb, u8 protocol,
+ int err);
+};
+
+int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
+int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
+
+void xfrm_flush_gc(void);
+void xfrm_state_delete_tunnel(struct xfrm_state *x);
+
+struct xfrm_type {
+ char *description;
+ struct module *owner;
+ u8 proto;
+ u8 flags;
+#define XFRM_TYPE_NON_FRAGMENT 1
+#define XFRM_TYPE_REPLAY_PROT 2
+#define XFRM_TYPE_LOCAL_COADDR 4
+#define XFRM_TYPE_REMOTE_COADDR 8
+
+ int (*init_state)(struct xfrm_state *x);
+ void (*destructor)(struct xfrm_state *);
+ int (*input)(struct xfrm_state *, struct sk_buff *skb);
+ int (*output)(struct xfrm_state *, struct sk_buff *pskb);
+ int (*reject)(struct xfrm_state *, struct sk_buff *,
+ const struct flowi *);
+ int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
+};
+
+int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
+void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
+
+struct xfrm_type_offload {
+ char *description;
+ struct module *owner;
+ u8 proto;
+ void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
+ int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
+ int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
+};
+
+int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
+void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
+
+static inline int xfrm_af2proto(unsigned int family)
+{
+ switch(family) {
+ case AF_INET:
+ return IPPROTO_IPIP;
+ case AF_INET6:
+ return IPPROTO_IPV6;
+ default:
+ return 0;
+ }
+}
+
+static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
+{
+ if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
+ (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
+ return &x->inner_mode;
+ else
+ return &x->inner_mode_iaf;
+}
+
+struct xfrm_tmpl {
+/* id in template is interpreted as:
+ * daddr - destination of tunnel, may be zero for transport mode.
+ * spi - zero to acquire spi. Not zero if spi is static, then
+ * daddr must be fixed too.
+ * proto - AH/ESP/IPCOMP
+ */
+ struct xfrm_id id;
+
+/* Source address of tunnel. Ignored, if it is not a tunnel. */
+ xfrm_address_t saddr;
+
+ unsigned short encap_family;
+
+ u32 reqid;
+
+/* Mode: transport, tunnel etc. */
+ u8 mode;
+
+/* Sharing mode: unique, this session only, this user only etc. */
+ u8 share;
+
+/* May skip this transfomration if no SA is found */
+ u8 optional;
+
+/* Skip aalgos/ealgos/calgos checks. */
+ u8 allalgs;
+
+/* Bit mask of algos allowed for acquisition */
+ u32 aalgos;
+ u32 ealgos;
+ u32 calgos;
+};
+
+#define XFRM_MAX_DEPTH 6
+#define XFRM_MAX_OFFLOAD_DEPTH 1
+
+struct xfrm_policy_walk_entry {
+ struct list_head all;
+ u8 dead;
+};
+
+struct xfrm_policy_walk {
+ struct xfrm_policy_walk_entry walk;
+ u8 type;
+ u32 seq;
+};
+
+struct xfrm_policy_queue {
+ struct sk_buff_head hold_queue;
+ struct timer_list hold_timer;
+ unsigned long timeout;
+};
+
+struct xfrm_policy {
+ possible_net_t xp_net;
+ struct hlist_node bydst;
+ struct hlist_node byidx;
+
+ /* This lock only affects elements except for entry. */
+ rwlock_t lock;
+ refcount_t refcnt;
+ u32 pos;
+ struct timer_list timer;
+
+ atomic_t genid;
+ u32 priority;
+ u32 index;
+ u32 if_id;
+ struct xfrm_mark mark;
+ struct xfrm_selector selector;
+ struct xfrm_lifetime_cfg lft;
+ struct xfrm_lifetime_cur curlft;
+ struct xfrm_policy_walk_entry walk;
+ struct xfrm_policy_queue polq;
+ bool bydst_reinsert;
+ u8 type;
+ u8 action;
+ u8 flags;
+ u8 xfrm_nr;
+ u16 family;
+ struct xfrm_sec_ctx *security;
+ struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
+ struct hlist_node bydst_inexact_list;
+ struct rcu_head rcu;
+};
+
+static inline struct net *xp_net(const struct xfrm_policy *xp)
+{
+ return read_pnet(&xp->xp_net);
+}
+
+struct xfrm_kmaddress {
+ xfrm_address_t local;
+ xfrm_address_t remote;
+ u32 reserved;
+ u16 family;
+};
+
+struct xfrm_migrate {
+ xfrm_address_t old_daddr;
+ xfrm_address_t old_saddr;
+ xfrm_address_t new_daddr;
+ xfrm_address_t new_saddr;
+ u8 proto;
+ u8 mode;
+ u16 reserved;
+ u32 reqid;
+ u16 old_family;
+ u16 new_family;
+};
+
+#define XFRM_KM_TIMEOUT 30
+/* what happened */
+#define XFRM_REPLAY_UPDATE XFRM_AE_CR
+#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
+
+/* default aevent timeout in units of 100ms */
+#define XFRM_AE_ETIME 10
+/* Async Event timer multiplier */
+#define XFRM_AE_ETH_M 10
+/* default seq threshold size */
+#define XFRM_AE_SEQT_SIZE 2
+
+struct xfrm_mgr {
+ struct list_head list;
+ int (*notify)(struct xfrm_state *x, const struct km_event *c);
+ int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
+ struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
+ int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
+ int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
+ int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
+ int (*migrate)(const struct xfrm_selector *sel,
+ u8 dir, u8 type,
+ const struct xfrm_migrate *m,
+ int num_bundles,
+ const struct xfrm_kmaddress *k,
+ const struct xfrm_encap_tmpl *encap);
+ bool (*is_alive)(const struct km_event *c);
+};
+
+int xfrm_register_km(struct xfrm_mgr *km);
+int xfrm_unregister_km(struct xfrm_mgr *km);
+
+struct xfrm_tunnel_skb_cb {
+ union {
+ struct inet_skb_parm h4;
+ struct inet6_skb_parm h6;
+ } header;
+
+ union {
+ struct ip_tunnel *ip4;
+ struct ip6_tnl *ip6;
+ } tunnel;
+};
+
+#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
+
+/*
+ * This structure is used for the duration where packets are being
+ * transformed by IPsec. As soon as the packet leaves IPsec the
+ * area beyond the generic IP part may be overwritten.
+ */
+struct xfrm_skb_cb {
+ struct xfrm_tunnel_skb_cb header;
+
+ /* Sequence number for replay protection. */
+ union {
+ struct {
+ __u32 low;
+ __u32 hi;
+ } output;
+ struct {
+ __be32 low;
+ __be32 hi;
+ } input;
+ } seq;
+};
+
+#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
+
+/*
+ * This structure is used by the afinfo prepare_input/prepare_output functions
+ * to transmit header information to the mode input/output functions.
+ */
+struct xfrm_mode_skb_cb {
+ struct xfrm_tunnel_skb_cb header;
+
+ /* Copied from header for IPv4, always set to zero and DF for IPv6. */
+ __be16 id;
+ __be16 frag_off;
+
+ /* IP header length (excluding options or extension headers). */
+ u8 ihl;
+
+ /* TOS for IPv4, class for IPv6. */
+ u8 tos;
+
+ /* TTL for IPv4, hop limitfor IPv6. */
+ u8 ttl;
+
+ /* Protocol for IPv4, NH for IPv6. */
+ u8 protocol;
+
+ /* Option length for IPv4, zero for IPv6. */
+ u8 optlen;
+
+ /* Used by IPv6 only, zero for IPv4. */
+ u8 flow_lbl[3];
+};
+
+#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
+
+/*
+ * This structure is used by the input processing to locate the SPI and
+ * related information.
+ */
+struct xfrm_spi_skb_cb {
+ struct xfrm_tunnel_skb_cb header;
+
+ unsigned int daddroff;
+ unsigned int family;
+ __be32 seq;
+};
+
+#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
+
+#ifdef CONFIG_AUDITSYSCALL
+static inline struct audit_buffer *xfrm_audit_start(const char *op)
+{
+ struct audit_buffer *audit_buf = NULL;
+
+ if (audit_enabled == AUDIT_OFF)
+ return NULL;
+ audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
+ AUDIT_MAC_IPSEC_EVENT);
+ if (audit_buf == NULL)
+ return NULL;
+ audit_log_format(audit_buf, "op=%s", op);
+ return audit_buf;
+}
+
+static inline void xfrm_audit_helper_usrinfo(bool task_valid,
+ struct audit_buffer *audit_buf)
+{
+ const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
+ audit_get_loginuid(current) :
+ INVALID_UID);
+ const unsigned int ses = task_valid ? audit_get_sessionid(current) :
+ AUDIT_SID_UNSET;
+
+ audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
+ audit_log_task_context(audit_buf);
+}
+
+void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
+void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
+ bool task_valid);
+void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
+void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
+void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
+ struct sk_buff *skb);
+void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
+ __be32 net_seq);
+void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
+void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
+ __be32 net_seq);
+void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
+ u8 proto);
+#else
+
+static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
+ bool task_valid)
+{
+}
+
+static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
+ bool task_valid)
+{
+}
+
+static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
+ bool task_valid)
+{
+}
+
+static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
+ bool task_valid)
+{
+}
+
+static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
+ struct sk_buff *skb)
+{
+}
+
+static inline void xfrm_audit_state_replay(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq)
+{
+}
+
+static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
+ u16 family)
+{
+}
+
+static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
+ __be32 net_spi, __be32 net_seq)
+{
+}
+
+static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
+ struct sk_buff *skb, u8 proto)
+{
+}
+#endif /* CONFIG_AUDITSYSCALL */
+
+static inline void xfrm_pol_hold(struct xfrm_policy *policy)
+{
+ if (likely(policy != NULL))
+ refcount_inc(&policy->refcnt);
+}
+
+void xfrm_policy_destroy(struct xfrm_policy *policy);
+
+static inline void xfrm_pol_put(struct xfrm_policy *policy)
+{
+ if (refcount_dec_and_test(&policy->refcnt))
+ xfrm_policy_destroy(policy);
+}
+
+static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
+{
+ int i;
+ for (i = npols - 1; i >= 0; --i)
+ xfrm_pol_put(pols[i]);
+}
+
+void __xfrm_state_destroy(struct xfrm_state *, bool);
+
+static inline void __xfrm_state_put(struct xfrm_state *x)
+{
+ refcount_dec(&x->refcnt);
+}
+
+static inline void xfrm_state_put(struct xfrm_state *x)
+{
+ if (refcount_dec_and_test(&x->refcnt))
+ __xfrm_state_destroy(x, false);
+}
+
+static inline void xfrm_state_put_sync(struct xfrm_state *x)
+{
+ if (refcount_dec_and_test(&x->refcnt))
+ __xfrm_state_destroy(x, true);
+}
+
+static inline void xfrm_state_hold(struct xfrm_state *x)
+{
+ refcount_inc(&x->refcnt);
+}
+
+static inline bool addr_match(const void *token1, const void *token2,
+ unsigned int prefixlen)
+{
+ const __be32 *a1 = token1;
+ const __be32 *a2 = token2;
+ unsigned int pdw;
+ unsigned int pbi;
+
+ pdw = prefixlen >> 5; /* num of whole u32 in prefix */
+ pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
+
+ if (pdw)
+ if (memcmp(a1, a2, pdw << 2))
+ return false;
+
+ if (pbi) {
+ __be32 mask;
+
+ mask = htonl((0xffffffff) << (32 - pbi));
+
+ if ((a1[pdw] ^ a2[pdw]) & mask)
+ return false;
+ }
+
+ return true;
+}
+
+static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
+{
+ /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
+ if (sizeof(long) == 4 && prefixlen == 0)
+ return true;
+ return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
+}
+
+static __inline__
+__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
+{
+ __be16 port;
+ switch(fl->flowi_proto) {
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ case IPPROTO_UDPLITE:
+ case IPPROTO_SCTP:
+ port = uli->ports.sport;
+ break;
+ case IPPROTO_ICMP:
+ case IPPROTO_ICMPV6:
+ port = htons(uli->icmpt.type);
+ break;
+ case IPPROTO_MH:
+ port = htons(uli->mht.type);
+ break;
+ case IPPROTO_GRE:
+ port = htons(ntohl(uli->gre_key) >> 16);
+ break;
+ default:
+ port = 0; /*XXX*/
+ }
+ return port;
+}
+
+static __inline__
+__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
+{
+ __be16 port;
+ switch(fl->flowi_proto) {
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ case IPPROTO_UDPLITE:
+ case IPPROTO_SCTP:
+ port = uli->ports.dport;
+ break;
+ case IPPROTO_ICMP:
+ case IPPROTO_ICMPV6:
+ port = htons(uli->icmpt.code);
+ break;
+ case IPPROTO_GRE:
+ port = htons(ntohl(uli->gre_key) & 0xffff);
+ break;
+ default:
+ port = 0; /*XXX*/
+ }
+ return port;
+}
+
+bool xfrm_selector_match(const struct xfrm_selector *sel,
+ const struct flowi *fl, unsigned short family);
+
+#ifdef CONFIG_SECURITY_NETWORK_XFRM
+/* If neither has a context --> match
+ * Otherwise, both must have a context and the sids, doi, alg must match
+ */
+static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
+{
+ return ((!s1 && !s2) ||
+ (s1 && s2 &&
+ (s1->ctx_sid == s2->ctx_sid) &&
+ (s1->ctx_doi == s2->ctx_doi) &&
+ (s1->ctx_alg == s2->ctx_alg)));
+}
+#else
+static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
+{
+ return true;
+}
+#endif
+
+/* A struct encoding bundle of transformations to apply to some set of flow.
+ *
+ * xdst->child points to the next element of bundle.
+ * dst->xfrm points to an instanse of transformer.
+ *
+ * Due to unfortunate limitations of current routing cache, which we
+ * have no time to fix, it mirrors struct rtable and bound to the same
+ * routing key, including saddr,daddr. However, we can have many of
+ * bundles differing by session id. All the bundles grow from a parent
+ * policy rule.
+ */
+struct xfrm_dst {
+ union {
+ struct dst_entry dst;
+ struct rtable rt;
+ struct rt6_info rt6;
+ } u;
+ struct dst_entry *route;
+ struct dst_entry *child;
+ struct dst_entry *path;
+ struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
+ int num_pols, num_xfrms;
+ u32 xfrm_genid;
+ u32 policy_genid;
+ u32 route_mtu_cached;
+ u32 child_mtu_cached;
+ u32 route_cookie;
+ u32 path_cookie;
+};
+
+static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
+{
+#ifdef CONFIG_XFRM
+ if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
+ const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
+
+ return xdst->path;
+ }
+#endif
+ return (struct dst_entry *) dst;
+}
+
+static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
+{
+#ifdef CONFIG_XFRM
+ if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
+ struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
+ return xdst->child;
+ }
+#endif
+ return NULL;
+}
+
+#ifdef CONFIG_XFRM
+static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
+{
+ xdst->child = child;
+}
+
+static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
+{
+ xfrm_pols_put(xdst->pols, xdst->num_pols);
+ dst_release(xdst->route);
+ if (likely(xdst->u.dst.xfrm))
+ xfrm_state_put(xdst->u.dst.xfrm);
+}
+#endif
+
+void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
+
+struct xfrm_if_parms {
+ int link; /* ifindex of underlying L2 interface */
+ u32 if_id; /* interface identifyer */
+};
+
+struct xfrm_if {
+ struct xfrm_if __rcu *next; /* next interface in list */
+ struct net_device *dev; /* virtual device associated with interface */
+ struct net *net; /* netns for packet i/o */
+ struct xfrm_if_parms p; /* interface parms */
+
+ struct gro_cells gro_cells;
+};
+
+struct xfrm_offload {
+ /* Output sequence number for replay protection on offloading. */
+ struct {
+ __u32 low;
+ __u32 hi;
+ } seq;
+
+ __u32 flags;
+#define SA_DELETE_REQ 1
+#define CRYPTO_DONE 2
+#define CRYPTO_NEXT_DONE 4
+#define CRYPTO_FALLBACK 8
+#define XFRM_GSO_SEGMENT 16
+#define XFRM_GRO 32
+#define XFRM_ESP_NO_TRAILER 64
+#define XFRM_DEV_RESUME 128
+#define XFRM_XMIT 256
+
+ __u32 status;
+#define CRYPTO_SUCCESS 1
+#define CRYPTO_GENERIC_ERROR 2
+#define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
+#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
+#define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
+#define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
+#define CRYPTO_INVALID_PACKET_SYNTAX 64
+#define CRYPTO_INVALID_PROTOCOL 128
+
+ __u8 proto;
+};
+
+struct sec_path {
+ int len;
+ int olen;
+ int verified_cnt;
+
+ struct xfrm_state *xvec[XFRM_MAX_DEPTH];
+ struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
+};
+
+struct sec_path *secpath_set(struct sk_buff *skb);
+
+static inline void
+secpath_reset(struct sk_buff *skb)
+{
+#ifdef CONFIG_XFRM
+ skb_ext_del(skb, SKB_EXT_SEC_PATH);
+#endif
+}
+
+static inline int
+xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return addr->a4 == 0;
+ case AF_INET6:
+ return ipv6_addr_any(&addr->in6);
+ }
+ return 0;
+}
+
+static inline int
+__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
+{
+ return (tmpl->saddr.a4 &&
+ tmpl->saddr.a4 != x->props.saddr.a4);
+}
+
+static inline int
+__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
+{
+ return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
+ !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
+}
+
+static inline int
+xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return __xfrm4_state_addr_cmp(tmpl, x);
+ case AF_INET6:
+ return __xfrm6_state_addr_cmp(tmpl, x);
+ }
+ return !0;
+}
+
+#ifdef CONFIG_XFRM
+int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
+ unsigned short family);
+
+static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb,
+ int dir)
+{
+ if (!net->xfrm.policy_count[dir] && !secpath_exists(skb))
+ return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT;
+
+ return false;
+}
+
+static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb,
+ int dir, unsigned short family)
+{
+ if (dir != XFRM_POLICY_OUT && family == AF_INET) {
+ /* same dst may be used for traffic originating from
+ * devices with different policy settings.
+ */
+ return IPCB(skb)->flags & IPSKB_NOPOLICY;
+ }
+ return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY);
+}
+
+static inline int __xfrm_policy_check2(struct sock *sk, int dir,
+ struct sk_buff *skb,
+ unsigned int family, int reverse)
+{
+ struct net *net = dev_net(skb->dev);
+ int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
+
+ if (sk && sk->sk_policy[XFRM_POLICY_IN])
+ return __xfrm_policy_check(sk, ndir, skb, family);
+
+ return __xfrm_check_nopolicy(net, skb, dir) ||
+ __xfrm_check_dev_nopolicy(skb, dir, family) ||
+ __xfrm_policy_check(sk, ndir, skb, family);
+}
+
+static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
+{
+ return __xfrm_policy_check2(sk, dir, skb, family, 0);
+}
+
+static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
+{
+ return xfrm_policy_check(sk, dir, skb, AF_INET);
+}
+
+static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
+{
+ return xfrm_policy_check(sk, dir, skb, AF_INET6);
+}
+
+static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
+ struct sk_buff *skb)
+{
+ return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
+}
+
+static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
+ struct sk_buff *skb)
+{
+ return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
+}
+
+int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
+ unsigned int family, int reverse);
+
+static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
+ unsigned int family)
+{
+ return __xfrm_decode_session(skb, fl, family, 0);
+}
+
+static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
+ struct flowi *fl,
+ unsigned int family)
+{
+ return __xfrm_decode_session(skb, fl, family, 1);
+}
+
+int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
+
+static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
+{
+ struct net *net = dev_net(skb->dev);
+
+ if (!net->xfrm.policy_count[XFRM_POLICY_OUT] &&
+ net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT)
+ return true;
+
+ return (skb_dst(skb)->flags & DST_NOXFRM) ||
+ __xfrm_route_forward(skb, family);
+}
+
+static inline int xfrm4_route_forward(struct sk_buff *skb)
+{
+ return xfrm_route_forward(skb, AF_INET);
+}
+
+static inline int xfrm6_route_forward(struct sk_buff *skb)
+{
+ return xfrm_route_forward(skb, AF_INET6);
+}
+
+int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
+
+static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
+{
+ if (!sk_fullsock(osk))
+ return 0;
+ sk->sk_policy[0] = NULL;
+ sk->sk_policy[1] = NULL;
+ if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
+ return __xfrm_sk_clone_policy(sk, osk);
+ return 0;
+}
+
+int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
+
+static inline void xfrm_sk_free_policy(struct sock *sk)
+{
+ struct xfrm_policy *pol;
+
+ pol = rcu_dereference_protected(sk->sk_policy[0], 1);
+ if (unlikely(pol != NULL)) {
+ xfrm_policy_delete(pol, XFRM_POLICY_MAX);
+ sk->sk_policy[0] = NULL;
+ }
+ pol = rcu_dereference_protected(sk->sk_policy[1], 1);
+ if (unlikely(pol != NULL)) {
+ xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
+ sk->sk_policy[1] = NULL;
+ }
+}
+
+#else
+
+static inline void xfrm_sk_free_policy(struct sock *sk) {}
+static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
+static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
+static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
+static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
+{
+ return 1;
+}
+static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
+{
+ return 1;
+}
+static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
+{
+ return 1;
+}
+static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
+ struct flowi *fl,
+ unsigned int family)
+{
+ return -ENOSYS;
+}
+static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
+ struct sk_buff *skb)
+{
+ return 1;
+}
+static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
+ struct sk_buff *skb)
+{
+ return 1;
+}
+#endif
+
+static __inline__
+xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
+{
+ switch (family){
+ case AF_INET:
+ return (xfrm_address_t *)&fl->u.ip4.daddr;
+ case AF_INET6:
+ return (xfrm_address_t *)&fl->u.ip6.daddr;
+ }
+ return NULL;
+}
+
+static __inline__
+xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
+{
+ switch (family){
+ case AF_INET:
+ return (xfrm_address_t *)&fl->u.ip4.saddr;
+ case AF_INET6:
+ return (xfrm_address_t *)&fl->u.ip6.saddr;
+ }
+ return NULL;
+}
+
+static __inline__
+void xfrm_flowi_addr_get(const struct flowi *fl,
+ xfrm_address_t *saddr, xfrm_address_t *daddr,
+ unsigned short family)
+{
+ switch(family) {
+ case AF_INET:
+ memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
+ memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
+ break;
+ case AF_INET6:
+ saddr->in6 = fl->u.ip6.saddr;
+ daddr->in6 = fl->u.ip6.daddr;
+ break;
+ }
+}
+
+static __inline__ int
+__xfrm4_state_addr_check(const struct xfrm_state *x,
+ const xfrm_address_t *daddr, const xfrm_address_t *saddr)
+{
+ if (daddr->a4 == x->id.daddr.a4 &&
+ (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
+ return 1;
+ return 0;
+}
+
+static __inline__ int
+__xfrm6_state_addr_check(const struct xfrm_state *x,
+ const xfrm_address_t *daddr, const xfrm_address_t *saddr)
+{
+ if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
+ (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
+ ipv6_addr_any((struct in6_addr *)saddr) ||
+ ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
+ return 1;
+ return 0;
+}
+
+static __inline__ int
+xfrm_state_addr_check(const struct xfrm_state *x,
+ const xfrm_address_t *daddr, const xfrm_address_t *saddr,
+ unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return __xfrm4_state_addr_check(x, daddr, saddr);
+ case AF_INET6:
+ return __xfrm6_state_addr_check(x, daddr, saddr);
+ }
+ return 0;
+}
+
+static __inline__ int
+xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
+ unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return __xfrm4_state_addr_check(x,
+ (const xfrm_address_t *)&fl->u.ip4.daddr,
+ (const xfrm_address_t *)&fl->u.ip4.saddr);
+ case AF_INET6:
+ return __xfrm6_state_addr_check(x,
+ (const xfrm_address_t *)&fl->u.ip6.daddr,
+ (const xfrm_address_t *)&fl->u.ip6.saddr);
+ }
+ return 0;
+}
+
+static inline int xfrm_state_kern(const struct xfrm_state *x)
+{
+ return atomic_read(&x->tunnel_users);
+}
+
+static inline bool xfrm_id_proto_valid(u8 proto)
+{
+ switch (proto) {
+ case IPPROTO_AH:
+ case IPPROTO_ESP:
+ case IPPROTO_COMP:
+#if IS_ENABLED(CONFIG_IPV6)
+ case IPPROTO_ROUTING:
+ case IPPROTO_DSTOPTS:
+#endif
+ return true;
+ default:
+ return false;
+ }
+}
+
+/* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
+static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
+{
+ return (!userproto || proto == userproto ||
+ (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
+ proto == IPPROTO_ESP ||
+ proto == IPPROTO_COMP)));
+}
+
+/*
+ * xfrm algorithm information
+ */
+struct xfrm_algo_aead_info {
+ char *geniv;
+ u16 icv_truncbits;
+};
+
+struct xfrm_algo_auth_info {
+ u16 icv_truncbits;
+ u16 icv_fullbits;
+};
+
+struct xfrm_algo_encr_info {
+ char *geniv;
+ u16 blockbits;
+ u16 defkeybits;
+};
+
+struct xfrm_algo_comp_info {
+ u16 threshold;
+};
+
+struct xfrm_algo_desc {
+ char *name;
+ char *compat;
+ u8 available:1;
+ u8 pfkey_supported:1;
+ union {
+ struct xfrm_algo_aead_info aead;
+ struct xfrm_algo_auth_info auth;
+ struct xfrm_algo_encr_info encr;
+ struct xfrm_algo_comp_info comp;
+ } uinfo;
+ struct sadb_alg desc;
+};
+
+/* XFRM protocol handlers. */
+struct xfrm4_protocol {
+ int (*handler)(struct sk_buff *skb);
+ int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
+ int encap_type);
+ int (*cb_handler)(struct sk_buff *skb, int err);
+ int (*err_handler)(struct sk_buff *skb, u32 info);
+
+ struct xfrm4_protocol __rcu *next;
+ int priority;
+};
+
+struct xfrm6_protocol {
+ int (*handler)(struct sk_buff *skb);
+ int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
+ int encap_type);
+ int (*cb_handler)(struct sk_buff *skb, int err);
+ int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ u8 type, u8 code, int offset, __be32 info);
+
+ struct xfrm6_protocol __rcu *next;
+ int priority;
+};
+
+/* XFRM tunnel handlers. */
+struct xfrm_tunnel {
+ int (*handler)(struct sk_buff *skb);
+ int (*cb_handler)(struct sk_buff *skb, int err);
+ int (*err_handler)(struct sk_buff *skb, u32 info);
+
+ struct xfrm_tunnel __rcu *next;
+ int priority;
+};
+
+struct xfrm6_tunnel {
+ int (*handler)(struct sk_buff *skb);
+ int (*cb_handler)(struct sk_buff *skb, int err);
+ int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
+ u8 type, u8 code, int offset, __be32 info);
+ struct xfrm6_tunnel __rcu *next;
+ int priority;
+};
+
+void xfrm_init(void);
+void xfrm4_init(void);
+int xfrm_state_init(struct net *net);
+void xfrm_state_fini(struct net *net);
+void xfrm4_state_init(void);
+void xfrm4_protocol_init(void);
+#ifdef CONFIG_XFRM
+int xfrm6_init(void);
+void xfrm6_fini(void);
+int xfrm6_state_init(void);
+void xfrm6_state_fini(void);
+int xfrm6_protocol_init(void);
+void xfrm6_protocol_fini(void);
+#else
+static inline int xfrm6_init(void)
+{
+ return 0;
+}
+static inline void xfrm6_fini(void)
+{
+ ;
+}
+#endif
+
+#ifdef CONFIG_XFRM_STATISTICS
+int xfrm_proc_init(struct net *net);
+void xfrm_proc_fini(struct net *net);
+#endif
+
+int xfrm_sysctl_init(struct net *net);
+#ifdef CONFIG_SYSCTL
+void xfrm_sysctl_fini(struct net *net);
+#else
+static inline void xfrm_sysctl_fini(struct net *net)
+{
+}
+#endif
+
+void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
+ struct xfrm_address_filter *filter);
+int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
+ int (*func)(struct xfrm_state *, int, void*), void *);
+void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
+struct xfrm_state *xfrm_state_alloc(struct net *net);
+void xfrm_state_free(struct xfrm_state *x);
+struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ const struct flowi *fl,
+ struct xfrm_tmpl *tmpl,
+ struct xfrm_policy *pol, int *err,
+ unsigned short family, u32 if_id);
+struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
+ xfrm_address_t *daddr,
+ xfrm_address_t *saddr,
+ unsigned short family,
+ u8 mode, u8 proto, u32 reqid);
+struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
+ unsigned short family);
+int xfrm_state_check_expire(struct xfrm_state *x);
+void xfrm_state_insert(struct xfrm_state *x);
+int xfrm_state_add(struct xfrm_state *x);
+int xfrm_state_update(struct xfrm_state *x);
+struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
+ const xfrm_address_t *daddr, __be32 spi,
+ u8 proto, unsigned short family);
+struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
+ const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr,
+ u8 proto,
+ unsigned short family);
+#ifdef CONFIG_XFRM_SUB_POLICY
+void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
+ unsigned short family);
+void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
+ unsigned short family);
+#else
+static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
+ int n, unsigned short family)
+{
+}
+
+static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
+ int n, unsigned short family)
+{
+}
+#endif
+
+struct xfrmk_sadinfo {
+ u32 sadhcnt; /* current hash bkts */
+ u32 sadhmcnt; /* max allowed hash bkts */
+ u32 sadcnt; /* current running count */
+};
+
+struct xfrmk_spdinfo {
+ u32 incnt;
+ u32 outcnt;
+ u32 fwdcnt;
+ u32 inscnt;
+ u32 outscnt;
+ u32 fwdscnt;
+ u32 spdhcnt;
+ u32 spdhmcnt;
+};
+
+struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
+int xfrm_state_delete(struct xfrm_state *x);
+int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
+int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
+void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
+void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
+u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
+int xfrm_init_replay(struct xfrm_state *x);
+u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
+int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
+int xfrm_init_state(struct xfrm_state *x);
+int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
+int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
+int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
+ int (*finish)(struct net *, struct sock *,
+ struct sk_buff *));
+int xfrm_trans_queue(struct sk_buff *skb,
+ int (*finish)(struct net *, struct sock *,
+ struct sk_buff *));
+int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err);
+int xfrm_output(struct sock *sk, struct sk_buff *skb);
+
+#if IS_ENABLED(CONFIG_NET_PKTGEN)
+int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
+#endif
+
+void xfrm_local_error(struct sk_buff *skb, int mtu);
+int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
+int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
+ int encap_type);
+int xfrm4_transport_finish(struct sk_buff *skb, int async);
+int xfrm4_rcv(struct sk_buff *skb);
+int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
+
+static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
+{
+ XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
+ XFRM_SPI_SKB_CB(skb)->family = AF_INET;
+ XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
+ return xfrm_input(skb, nexthdr, spi, 0);
+}
+
+int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
+int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
+int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
+int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
+int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
+int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
+void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
+int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
+int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
+ struct ip6_tnl *t);
+int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
+ int encap_type);
+int xfrm6_transport_finish(struct sk_buff *skb, int async);
+int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
+int xfrm6_rcv(struct sk_buff *skb);
+int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
+ xfrm_address_t *saddr, u8 proto);
+void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
+int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
+int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
+int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
+int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
+__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
+__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
+int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
+int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
+int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
+ u8 **prevhdr);
+
+#ifdef CONFIG_XFRM
+void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu);
+int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
+int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
+int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval,
+ int optlen);
+#else
+static inline int xfrm_user_policy(struct sock *sk, int optname,
+ sockptr_t optval, int optlen)
+{
+ return -ENOPROTOOPT;
+}
+#endif
+
+struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
+ const xfrm_address_t *saddr,
+ const xfrm_address_t *daddr,
+ int family, u32 mark);
+
+struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
+
+void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
+int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
+ int (*func)(struct xfrm_policy *, int, int, void*),
+ void *);
+void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
+int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
+struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net,
+ const struct xfrm_mark *mark,
+ u32 if_id, u8 type, int dir,
+ struct xfrm_selector *sel,
+ struct xfrm_sec_ctx *ctx, int delete,
+ int *err);
+struct xfrm_policy *xfrm_policy_byid(struct net *net,
+ const struct xfrm_mark *mark, u32 if_id,
+ u8 type, int dir, u32 id, int delete,
+ int *err);
+int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
+void xfrm_policy_hash_rebuild(struct net *net);
+u32 xfrm_get_acqseq(void);
+int verify_spi_info(u8 proto, u32 min, u32 max);
+int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
+struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
+ u8 mode, u32 reqid, u32 if_id, u8 proto,
+ const xfrm_address_t *daddr,
+ const xfrm_address_t *saddr, int create,
+ unsigned short family);
+int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
+
+#ifdef CONFIG_XFRM_MIGRATE
+int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
+ const struct xfrm_migrate *m, int num_bundles,
+ const struct xfrm_kmaddress *k,
+ const struct xfrm_encap_tmpl *encap);
+struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
+ u32 if_id);
+struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
+ struct xfrm_migrate *m,
+ struct xfrm_encap_tmpl *encap);
+int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
+ struct xfrm_migrate *m, int num_bundles,
+ struct xfrm_kmaddress *k, struct net *net,
+ struct xfrm_encap_tmpl *encap, u32 if_id);
+#endif
+
+int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
+void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
+int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
+ xfrm_address_t *addr);
+
+void xfrm_input_init(void);
+int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
+
+void xfrm_probe_algs(void);
+int xfrm_count_pfkey_auth_supported(void);
+int xfrm_count_pfkey_enc_supported(void);
+struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
+struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
+struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
+struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
+struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
+struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
+struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
+struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
+struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
+ int probe);
+
+static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
+ const xfrm_address_t *b)
+{
+ return ipv6_addr_equal((const struct in6_addr *)a,
+ (const struct in6_addr *)b);
+}
+
+static inline bool xfrm_addr_equal(const xfrm_address_t *a,
+ const xfrm_address_t *b,
+ sa_family_t family)
+{
+ switch (family) {
+ default:
+ case AF_INET:
+ return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
+ case AF_INET6:
+ return xfrm6_addr_equal(a, b);
+ }
+}
+
+static inline int xfrm_policy_id2dir(u32 index)
+{
+ return index & 7;
+}
+
+#ifdef CONFIG_XFRM
+static inline int xfrm_aevent_is_on(struct net *net)
+{
+ struct sock *nlsk;
+ int ret = 0;
+
+ rcu_read_lock();
+ nlsk = rcu_dereference(net->xfrm.nlsk);
+ if (nlsk)
+ ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
+ rcu_read_unlock();
+ return ret;
+}
+
+static inline int xfrm_acquire_is_on(struct net *net)
+{
+ struct sock *nlsk;
+ int ret = 0;
+
+ rcu_read_lock();
+ nlsk = rcu_dereference(net->xfrm.nlsk);
+ if (nlsk)
+ ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
+ rcu_read_unlock();
+
+ return ret;
+}
+#endif
+
+static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
+{
+ return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
+}
+
+static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
+{
+ return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
+}
+
+static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
+{
+ return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
+}
+
+static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
+{
+ return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
+}
+
+#ifdef CONFIG_XFRM_MIGRATE
+static inline int xfrm_replay_clone(struct xfrm_state *x,
+ struct xfrm_state *orig)
+{
+
+ x->replay_esn = kmemdup(orig->replay_esn,
+ xfrm_replay_state_esn_len(orig->replay_esn),
+ GFP_KERNEL);
+ if (!x->replay_esn)
+ return -ENOMEM;
+ x->preplay_esn = kmemdup(orig->preplay_esn,
+ xfrm_replay_state_esn_len(orig->preplay_esn),
+ GFP_KERNEL);
+ if (!x->preplay_esn)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
+{
+ return kmemdup(orig, aead_len(orig), GFP_KERNEL);
+}
+
+
+static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
+{
+ return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
+}
+
+static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
+{
+ return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
+}
+
+static inline void xfrm_states_put(struct xfrm_state **states, int n)
+{
+ int i;
+ for (i = 0; i < n; i++)
+ xfrm_state_put(*(states + i));
+}
+
+static inline void xfrm_states_delete(struct xfrm_state **states, int n)
+{
+ int i;
+ for (i = 0; i < n; i++)
+ xfrm_state_delete(*(states + i));
+}
+#endif
+
+#ifdef CONFIG_XFRM
+static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
+{
+ struct sec_path *sp = skb_sec_path(skb);
+
+ return sp->xvec[sp->len - 1];
+}
+#endif
+
+static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
+{
+#ifdef CONFIG_XFRM
+ struct sec_path *sp = skb_sec_path(skb);
+
+ if (!sp || !sp->olen || sp->len != sp->olen)
+ return NULL;
+
+ return &sp->ovec[sp->olen - 1];
+#else
+ return NULL;
+#endif
+}
+
+void __init xfrm_dev_init(void);
+
+#ifdef CONFIG_XFRM_OFFLOAD
+void xfrm_dev_resume(struct sk_buff *skb);
+void xfrm_dev_backlog(struct softnet_data *sd);
+struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
+int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
+ struct xfrm_user_offload *xuo);
+bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
+
+static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
+{
+ struct xfrm_state_offload *xso = &x->xso;
+
+ if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
+ xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
+}
+
+static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
+{
+ struct xfrm_state *x = dst->xfrm;
+ struct xfrm_dst *xdst;
+
+ if (!x || !x->type_offload)
+ return false;
+
+ xdst = (struct xfrm_dst *) dst;
+ if (!x->xso.offload_handle && !xdst->child->xfrm)
+ return true;
+ if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
+ !xdst->child->xfrm)
+ return true;
+
+ return false;
+}
+
+static inline void xfrm_dev_state_delete(struct xfrm_state *x)
+{
+ struct xfrm_state_offload *xso = &x->xso;
+
+ if (xso->dev)
+ xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
+}
+
+static inline void xfrm_dev_state_free(struct xfrm_state *x)
+{
+ struct xfrm_state_offload *xso = &x->xso;
+ struct net_device *dev = xso->dev;
+
+ if (dev && dev->xfrmdev_ops) {
+ if (dev->xfrmdev_ops->xdo_dev_state_free)
+ dev->xfrmdev_ops->xdo_dev_state_free(x);
+ xso->dev = NULL;
+ dev_put(dev);
+ }
+}
+#else
+static inline void xfrm_dev_resume(struct sk_buff *skb)
+{
+}
+
+static inline void xfrm_dev_backlog(struct softnet_data *sd)
+{
+}
+
+static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
+{
+ return skb;
+}
+
+static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
+{
+ return 0;
+}
+
+static inline void xfrm_dev_state_delete(struct xfrm_state *x)
+{
+}
+
+static inline void xfrm_dev_state_free(struct xfrm_state *x)
+{
+}
+
+static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
+{
+ return false;
+}
+
+static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
+{
+}
+
+static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
+{
+ return false;
+}
+#endif
+
+static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
+{
+ if (attrs[XFRMA_MARK])
+ memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
+ else
+ m->v = m->m = 0;
+
+ return m->v & m->m;
+}
+
+static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
+{
+ int ret = 0;
+
+ if (m->m | m->v)
+ ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
+ return ret;
+}
+
+static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
+{
+ struct xfrm_mark *m = &x->props.smark;
+
+ return (m->v & m->m) | (mark & ~m->m);
+}
+
+static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
+{
+ int ret = 0;
+
+ if (if_id)
+ ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
+ return ret;
+}
+
+static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
+ unsigned int family)
+{
+ bool tunnel = false;
+
+ switch(family) {
+ case AF_INET:
+ if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
+ tunnel = true;
+ break;
+ case AF_INET6:
+ if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
+ tunnel = true;
+ break;
+ }
+ if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
+ return -EINVAL;
+
+ return 0;
+}
+
+extern const int xfrm_msg_min[XFRM_NR_MSGTYPES];
+extern const struct nla_policy xfrma_policy[XFRMA_MAX+1];
+
+struct xfrm_translator {
+ /* Allocate frag_list and put compat translation there */
+ int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src);
+
+ /* Allocate nlmsg with 64-bit translaton of received 32-bit message */
+ struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh,
+ int maxtype, const struct nla_policy *policy,
+ struct netlink_ext_ack *extack);
+
+ /* Translate 32-bit user_policy from sockptr */
+ int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen);
+
+ struct module *owner;
+};
+
+#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
+extern int xfrm_register_translator(struct xfrm_translator *xtr);
+extern int xfrm_unregister_translator(struct xfrm_translator *xtr);
+extern struct xfrm_translator *xfrm_get_translator(void);
+extern void xfrm_put_translator(struct xfrm_translator *xtr);
+#else
+static inline struct xfrm_translator *xfrm_get_translator(void)
+{
+ return NULL;
+}
+static inline void xfrm_put_translator(struct xfrm_translator *xtr)
+{
+}
+#endif
+
+#if IS_ENABLED(CONFIG_IPV6)
+static inline bool xfrm6_local_dontfrag(const struct sock *sk)
+{
+ int proto;
+
+ if (!sk || sk->sk_family != AF_INET6)
+ return false;
+
+ proto = sk->sk_protocol;
+ if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
+ return inet6_sk(sk)->dontfrag;
+
+ return false;
+}
+#endif
+#endif /* _NET_XFRM_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 21:58:40 +0000