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2065 lines
55 KiB
2065 lines
55 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _NET_XFRM_H |
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#define _NET_XFRM_H |
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#include <linux/compiler.h> |
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#include <linux/xfrm.h> |
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#include <linux/spinlock.h> |
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#include <linux/list.h> |
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#include <linux/skbuff.h> |
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#include <linux/socket.h> |
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#include <linux/pfkeyv2.h> |
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#include <linux/ipsec.h> |
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#include <linux/in6.h> |
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#include <linux/mutex.h> |
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#include <linux/audit.h> |
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#include <linux/slab.h> |
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#include <linux/refcount.h> |
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#include <linux/sockptr.h> |
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#include <net/sock.h> |
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#include <net/dst.h> |
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#include <net/ip.h> |
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#include <net/route.h> |
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#include <net/ipv6.h> |
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#include <net/ip6_fib.h> |
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#include <net/flow.h> |
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#include <net/gro_cells.h> |
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#include <linux/interrupt.h> |
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#ifdef CONFIG_XFRM_STATISTICS |
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#include <net/snmp.h> |
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#endif |
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#define XFRM_PROTO_ESP 50 |
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#define XFRM_PROTO_AH 51 |
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#define XFRM_PROTO_COMP 108 |
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#define XFRM_PROTO_IPIP 4 |
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#define XFRM_PROTO_IPV6 41 |
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#define XFRM_PROTO_ROUTING IPPROTO_ROUTING |
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#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS |
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#define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
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#define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
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#define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
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MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) |
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#define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
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MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) |
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#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
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MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) |
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#ifdef CONFIG_XFRM_STATISTICS |
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#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
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#else |
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#define XFRM_INC_STATS(net, field) ((void)(net)) |
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#endif |
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/* Organization of SPD aka "XFRM rules" |
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------------------------------------ |
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Basic objects: |
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- policy rule, struct xfrm_policy (=SPD entry) |
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- bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) |
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- instance of a transformer, struct xfrm_state (=SA) |
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- template to clone xfrm_state, struct xfrm_tmpl |
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SPD is plain linear list of xfrm_policy rules, ordered by priority. |
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(To be compatible with existing pfkeyv2 implementations, |
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many rules with priority of 0x7fffffff are allowed to exist and |
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such rules are ordered in an unpredictable way, thanks to bsd folks.) |
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Lookup is plain linear search until the first match with selector. |
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If "action" is "block", then we prohibit the flow, otherwise: |
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if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, |
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policy entry has list of up to XFRM_MAX_DEPTH transformations, |
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described by templates xfrm_tmpl. Each template is resolved |
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to a complete xfrm_state (see below) and we pack bundle of transformations |
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to a dst_entry returned to requestor. |
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|
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dst -. xfrm .-> xfrm_state #1 |
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|---. child .-> dst -. xfrm .-> xfrm_state #2 |
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|---. child .-> dst -. xfrm .-> xfrm_state #3 |
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|---. child .-> NULL |
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Bundles are cached at xrfm_policy struct (field ->bundles). |
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Resolution of xrfm_tmpl |
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----------------------- |
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Template contains: |
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1. ->mode Mode: transport or tunnel |
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2. ->id.proto Protocol: AH/ESP/IPCOMP |
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3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. |
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Q: allow to resolve security gateway? |
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4. ->id.spi If not zero, static SPI. |
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5. ->saddr Local tunnel endpoint, ignored for transport mode. |
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6. ->algos List of allowed algos. Plain bitmask now. |
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Q: ealgos, aalgos, calgos. What a mess... |
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7. ->share Sharing mode. |
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Q: how to implement private sharing mode? To add struct sock* to |
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flow id? |
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Having this template we search through SAD searching for entries |
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with appropriate mode/proto/algo, permitted by selector. |
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If no appropriate entry found, it is requested from key manager. |
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PROBLEMS: |
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Q: How to find all the bundles referring to a physical path for |
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PMTU discovery? Seems, dst should contain list of all parents... |
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and enter to infinite locking hierarchy disaster. |
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No! It is easier, we will not search for them, let them find us. |
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We add genid to each dst plus pointer to genid of raw IP route, |
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pmtu disc will update pmtu on raw IP route and increase its genid. |
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dst_check() will see this for top level and trigger resyncing |
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metrics. Plus, it will be made via sk->sk_dst_cache. Solved. |
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*/ |
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struct xfrm_state_walk { |
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struct list_head all; |
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u8 state; |
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u8 dying; |
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u8 proto; |
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u32 seq; |
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struct xfrm_address_filter *filter; |
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}; |
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struct xfrm_state_offload { |
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struct net_device *dev; |
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struct net_device *real_dev; |
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unsigned long offload_handle; |
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unsigned int num_exthdrs; |
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u8 flags; |
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}; |
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struct xfrm_mode { |
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u8 encap; |
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u8 family; |
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u8 flags; |
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}; |
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/* Flags for xfrm_mode. */ |
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enum { |
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XFRM_MODE_FLAG_TUNNEL = 1, |
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}; |
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enum xfrm_replay_mode { |
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XFRM_REPLAY_MODE_LEGACY, |
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XFRM_REPLAY_MODE_BMP, |
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XFRM_REPLAY_MODE_ESN, |
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}; |
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/* Full description of state of transformer. */ |
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struct xfrm_state { |
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possible_net_t xs_net; |
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union { |
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struct hlist_node gclist; |
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struct hlist_node bydst; |
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}; |
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struct hlist_node bysrc; |
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struct hlist_node byspi; |
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struct hlist_node byseq; |
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refcount_t refcnt; |
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spinlock_t lock; |
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struct xfrm_id id; |
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struct xfrm_selector sel; |
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struct xfrm_mark mark; |
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u32 if_id; |
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u32 tfcpad; |
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u32 genid; |
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/* Key manager bits */ |
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struct xfrm_state_walk km; |
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/* Parameters of this state. */ |
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struct { |
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u32 reqid; |
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u8 mode; |
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u8 replay_window; |
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u8 aalgo, ealgo, calgo; |
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u8 flags; |
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u16 family; |
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xfrm_address_t saddr; |
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int header_len; |
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int trailer_len; |
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u32 extra_flags; |
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struct xfrm_mark smark; |
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} props; |
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struct xfrm_lifetime_cfg lft; |
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/* Data for transformer */ |
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struct xfrm_algo_auth *aalg; |
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struct xfrm_algo *ealg; |
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struct xfrm_algo *calg; |
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struct xfrm_algo_aead *aead; |
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const char *geniv; |
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/* Data for encapsulator */ |
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struct xfrm_encap_tmpl *encap; |
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struct sock __rcu *encap_sk; |
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/* Data for care-of address */ |
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xfrm_address_t *coaddr; |
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/* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
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struct xfrm_state *tunnel; |
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/* If a tunnel, number of users + 1 */ |
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atomic_t tunnel_users; |
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/* State for replay detection */ |
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struct xfrm_replay_state replay; |
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struct xfrm_replay_state_esn *replay_esn; |
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/* Replay detection state at the time we sent the last notification */ |
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struct xfrm_replay_state preplay; |
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struct xfrm_replay_state_esn *preplay_esn; |
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/* replay detection mode */ |
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enum xfrm_replay_mode repl_mode; |
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/* internal flag that only holds state for delayed aevent at the |
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* moment |
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*/ |
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u32 xflags; |
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/* Replay detection notification settings */ |
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u32 replay_maxage; |
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u32 replay_maxdiff; |
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/* Replay detection notification timer */ |
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struct timer_list rtimer; |
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/* Statistics */ |
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struct xfrm_stats stats; |
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struct xfrm_lifetime_cur curlft; |
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struct hrtimer mtimer; |
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struct xfrm_state_offload xso; |
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/* used to fix curlft->add_time when changing date */ |
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long saved_tmo; |
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/* Last used time */ |
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time64_t lastused; |
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struct page_frag xfrag; |
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/* Reference to data common to all the instances of this |
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* transformer. */ |
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const struct xfrm_type *type; |
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struct xfrm_mode inner_mode; |
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struct xfrm_mode inner_mode_iaf; |
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struct xfrm_mode outer_mode; |
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const struct xfrm_type_offload *type_offload; |
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/* Security context */ |
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struct xfrm_sec_ctx *security; |
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/* Private data of this transformer, format is opaque, |
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* interpreted by xfrm_type methods. */ |
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void *data; |
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}; |
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static inline struct net *xs_net(struct xfrm_state *x) |
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{ |
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return read_pnet(&x->xs_net); |
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} |
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/* xflags - make enum if more show up */ |
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#define XFRM_TIME_DEFER 1 |
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#define XFRM_SOFT_EXPIRE 2 |
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enum { |
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XFRM_STATE_VOID, |
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XFRM_STATE_ACQ, |
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XFRM_STATE_VALID, |
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XFRM_STATE_ERROR, |
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XFRM_STATE_EXPIRED, |
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XFRM_STATE_DEAD |
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}; |
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/* callback structure passed from either netlink or pfkey */ |
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struct km_event { |
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union { |
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u32 hard; |
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u32 proto; |
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u32 byid; |
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u32 aevent; |
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u32 type; |
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} data; |
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u32 seq; |
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u32 portid; |
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u32 event; |
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struct net *net; |
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}; |
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struct xfrm_if_cb { |
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struct xfrm_if *(*decode_session)(struct sk_buff *skb, |
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unsigned short family); |
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}; |
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void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb); |
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void xfrm_if_unregister_cb(void); |
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struct net_device; |
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struct xfrm_type; |
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struct xfrm_dst; |
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struct xfrm_policy_afinfo { |
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struct dst_ops *dst_ops; |
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struct dst_entry *(*dst_lookup)(struct net *net, |
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int tos, int oif, |
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const xfrm_address_t *saddr, |
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const xfrm_address_t *daddr, |
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u32 mark); |
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int (*get_saddr)(struct net *net, int oif, |
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xfrm_address_t *saddr, |
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xfrm_address_t *daddr, |
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u32 mark); |
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int (*fill_dst)(struct xfrm_dst *xdst, |
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struct net_device *dev, |
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const struct flowi *fl); |
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struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
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}; |
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int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
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void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); |
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void km_policy_notify(struct xfrm_policy *xp, int dir, |
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const struct km_event *c); |
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void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
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struct xfrm_tmpl; |
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int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
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struct xfrm_policy *pol); |
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void km_state_expired(struct xfrm_state *x, int hard, u32 portid); |
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int __xfrm_state_delete(struct xfrm_state *x); |
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struct xfrm_state_afinfo { |
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u8 family; |
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u8 proto; |
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const struct xfrm_type_offload *type_offload_esp; |
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const struct xfrm_type *type_esp; |
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const struct xfrm_type *type_ipip; |
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const struct xfrm_type *type_ipip6; |
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const struct xfrm_type *type_comp; |
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const struct xfrm_type *type_ah; |
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const struct xfrm_type *type_routing; |
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const struct xfrm_type *type_dstopts; |
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int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
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int (*transport_finish)(struct sk_buff *skb, |
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int async); |
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void (*local_error)(struct sk_buff *skb, u32 mtu); |
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}; |
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int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
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int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); |
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struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); |
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struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
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struct xfrm_input_afinfo { |
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u8 family; |
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bool is_ipip; |
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int (*callback)(struct sk_buff *skb, u8 protocol, |
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int err); |
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}; |
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int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
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int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); |
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void xfrm_flush_gc(void); |
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void xfrm_state_delete_tunnel(struct xfrm_state *x); |
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struct xfrm_type { |
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struct module *owner; |
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u8 proto; |
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u8 flags; |
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#define XFRM_TYPE_NON_FRAGMENT 1 |
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#define XFRM_TYPE_REPLAY_PROT 2 |
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#define XFRM_TYPE_LOCAL_COADDR 4 |
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#define XFRM_TYPE_REMOTE_COADDR 8 |
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int (*init_state)(struct xfrm_state *x); |
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void (*destructor)(struct xfrm_state *); |
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int (*input)(struct xfrm_state *, struct sk_buff *skb); |
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int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
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int (*reject)(struct xfrm_state *, struct sk_buff *, |
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const struct flowi *); |
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}; |
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int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
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void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); |
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struct xfrm_type_offload { |
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struct module *owner; |
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u8 proto; |
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void (*encap)(struct xfrm_state *, struct sk_buff *pskb); |
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int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); |
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int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); |
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}; |
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int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
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void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); |
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static inline int xfrm_af2proto(unsigned int family) |
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{ |
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switch(family) { |
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case AF_INET: |
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return IPPROTO_IPIP; |
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case AF_INET6: |
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return IPPROTO_IPV6; |
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default: |
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return 0; |
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} |
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} |
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static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) |
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{ |
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if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || |
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(ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) |
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return &x->inner_mode; |
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else |
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return &x->inner_mode_iaf; |
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} |
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struct xfrm_tmpl { |
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/* id in template is interpreted as: |
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* daddr - destination of tunnel, may be zero for transport mode. |
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* spi - zero to acquire spi. Not zero if spi is static, then |
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* daddr must be fixed too. |
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* proto - AH/ESP/IPCOMP |
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*/ |
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struct xfrm_id id; |
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/* Source address of tunnel. Ignored, if it is not a tunnel. */ |
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xfrm_address_t saddr; |
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unsigned short encap_family; |
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u32 reqid; |
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/* Mode: transport, tunnel etc. */ |
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u8 mode; |
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/* Sharing mode: unique, this session only, this user only etc. */ |
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u8 share; |
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/* May skip this transfomration if no SA is found */ |
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u8 optional; |
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/* Skip aalgos/ealgos/calgos checks. */ |
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u8 allalgs; |
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/* Bit mask of algos allowed for acquisition */ |
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u32 aalgos; |
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u32 ealgos; |
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u32 calgos; |
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}; |
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#define XFRM_MAX_DEPTH 6 |
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#define XFRM_MAX_OFFLOAD_DEPTH 1 |
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struct xfrm_policy_walk_entry { |
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struct list_head all; |
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u8 dead; |
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}; |
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struct xfrm_policy_walk { |
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struct xfrm_policy_walk_entry walk; |
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u8 type; |
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u32 seq; |
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}; |
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struct xfrm_policy_queue { |
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struct sk_buff_head hold_queue; |
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struct timer_list hold_timer; |
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unsigned long timeout; |
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}; |
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struct xfrm_policy { |
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possible_net_t xp_net; |
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struct hlist_node bydst; |
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struct hlist_node byidx; |
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/* This lock only affects elements except for entry. */ |
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rwlock_t lock; |
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refcount_t refcnt; |
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u32 pos; |
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struct timer_list timer; |
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atomic_t genid; |
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u32 priority; |
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u32 index; |
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u32 if_id; |
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struct xfrm_mark mark; |
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struct xfrm_selector selector; |
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struct xfrm_lifetime_cfg lft; |
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struct xfrm_lifetime_cur curlft; |
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struct xfrm_policy_walk_entry walk; |
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struct xfrm_policy_queue polq; |
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bool bydst_reinsert; |
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u8 type; |
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u8 action; |
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u8 flags; |
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u8 xfrm_nr; |
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u16 family; |
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struct xfrm_sec_ctx *security; |
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struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
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struct hlist_node bydst_inexact_list; |
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struct rcu_head rcu; |
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}; |
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static inline struct net *xp_net(const struct xfrm_policy *xp) |
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{ |
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return read_pnet(&xp->xp_net); |
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} |
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struct xfrm_kmaddress { |
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xfrm_address_t local; |
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xfrm_address_t remote; |
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u32 reserved; |
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u16 family; |
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}; |
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struct xfrm_migrate { |
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xfrm_address_t old_daddr; |
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xfrm_address_t old_saddr; |
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xfrm_address_t new_daddr; |
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xfrm_address_t new_saddr; |
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u8 proto; |
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u8 mode; |
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u16 reserved; |
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u32 reqid; |
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u16 old_family; |
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u16 new_family; |
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}; |
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#define XFRM_KM_TIMEOUT 30 |
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/* what happened */ |
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#define XFRM_REPLAY_UPDATE XFRM_AE_CR |
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#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE |
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|
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/* default aevent timeout in units of 100ms */ |
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#define XFRM_AE_ETIME 10 |
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/* Async Event timer multiplier */ |
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#define XFRM_AE_ETH_M 10 |
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/* default seq threshold size */ |
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#define XFRM_AE_SEQT_SIZE 2 |
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|
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struct xfrm_mgr { |
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struct list_head list; |
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int (*notify)(struct xfrm_state *x, const struct km_event *c); |
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int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
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struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
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int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
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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; |
|
__u8 inner_ipproto; |
|
}; |
|
|
|
struct sec_path { |
|
int len; |
|
int olen; |
|
|
|
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 |
|
static inline bool |
|
xfrm_default_allow(struct net *net, int dir) |
|
{ |
|
u8 def = net->xfrm.policy_default; |
|
|
|
switch (dir) { |
|
case XFRM_POLICY_IN: |
|
return def & XFRM_POL_DEFAULT_IN ? false : true; |
|
case XFRM_POLICY_OUT: |
|
return def & XFRM_POL_DEFAULT_OUT ? false : true; |
|
case XFRM_POLICY_FWD: |
|
return def & XFRM_POL_DEFAULT_FWD ? false : true; |
|
} |
|
return false; |
|
} |
|
|
|
int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
|
unsigned short family); |
|
|
|
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); |
|
|
|
if (xfrm_default_allow(net, dir)) |
|
return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) || |
|
(skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY)) || |
|
__xfrm_policy_check(sk, ndir, skb, family); |
|
else |
|
return (skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY)) || |
|
__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 (xfrm_default_allow(net, XFRM_POLICY_FWD)) |
|
return !net->xfrm.policy_count[XFRM_POLICY_OUT] || |
|
(skb_dst(skb)->flags & DST_NOXFRM) || |
|
__xfrm_route_forward(skb, family); |
|
else |
|
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) |
|
{ |
|
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); |
|
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); |
|
|
|
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_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); |
|
|
|
#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); |
|
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); |
|
#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 |
|
void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq); |
|
int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
|
void xfrm_replay_notify(struct xfrm_state *x, int event); |
|
int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb); |
|
int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); |
|
|
|
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 */
|
|
|