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net/xfrm/xfrm_state.c
51.8 KB
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/* * xfrm_state.c * * Changes: * Mitsuru KANDA @USAGI * Kazunori MIYAZAWA @USAGI * Kunihiro Ishiguro <kunihiro@ipinfusion.com> * IPv6 support * YOSHIFUJI Hideaki @USAGI * Split up af-specific functions * Derek Atkins <derek@ihtfp.com> * Add UDP Encapsulation |
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* |
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*/ #include <linux/workqueue.h> #include <net/xfrm.h> #include <linux/pfkeyv2.h> #include <linux/ipsec.h> #include <linux/module.h> |
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#include <linux/cache.h> |
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#include <linux/audit.h> |
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#include <asm/uaccess.h> |
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#include "xfrm_hash.h" |
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struct sock *xfrm_nl; EXPORT_SYMBOL(xfrm_nl); |
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u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME; |
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EXPORT_SYMBOL(sysctl_xfrm_aevent_etime); |
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u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE; |
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EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth); |
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u32 sysctl_xfrm_acq_expires __read_mostly = 30; |
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/* Each xfrm_state may be linked to two tables: 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) |
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2. Hash table by (daddr,family,reqid) to find what SAs exist for given |
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destination/tunnel endpoint. (output) */ static DEFINE_SPINLOCK(xfrm_state_lock); /* Hash table to find appropriate SA towards given target (endpoint * of tunnel or destination of transport mode) allowed by selector. * * Main use is finding SA after policy selected tunnel or transport mode. * Also, it can be used by ah/esp icmp error handler to find offending SA. */ |
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static LIST_HEAD(xfrm_state_all); |
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static struct hlist_head *xfrm_state_bydst __read_mostly; static struct hlist_head *xfrm_state_bysrc __read_mostly; static struct hlist_head *xfrm_state_byspi __read_mostly; static unsigned int xfrm_state_hmask __read_mostly; static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; static unsigned int xfrm_state_num; |
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static unsigned int xfrm_state_genid; |
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static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); |
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#ifdef CONFIG_AUDITSYSCALL static void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq); #else #define xfrm_audit_state_replay(x, s, sq) do { ; } while (0) #endif /* CONFIG_AUDITSYSCALL */ |
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static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr, xfrm_address_t *saddr, u32 reqid, |
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unsigned short family) |
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{ |
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return __xfrm_dst_hash(daddr, saddr, reqid, family, xfrm_state_hmask); |
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} |
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static inline unsigned int xfrm_src_hash(xfrm_address_t *daddr, xfrm_address_t *saddr, |
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unsigned short family) |
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{ |
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return __xfrm_src_hash(daddr, saddr, family, xfrm_state_hmask); |
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} |
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static inline unsigned int |
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xfrm_spi_hash(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
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{ |
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return __xfrm_spi_hash(daddr, spi, proto, family, xfrm_state_hmask); |
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} |
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static void xfrm_hash_transfer(struct hlist_head *list, struct hlist_head *ndsttable, struct hlist_head *nsrctable, struct hlist_head *nspitable, unsigned int nhashmask) { struct hlist_node *entry, *tmp; struct xfrm_state *x; hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { unsigned int h; |
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h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family, nhashmask); |
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hlist_add_head(&x->bydst, ndsttable+h); |
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h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family, |
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nhashmask); hlist_add_head(&x->bysrc, nsrctable+h); |
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if (x->id.spi) { h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family, nhashmask); hlist_add_head(&x->byspi, nspitable+h); } |
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} } static unsigned long xfrm_hash_new_size(void) { return ((xfrm_state_hmask + 1) << 1) * sizeof(struct hlist_head); } static DEFINE_MUTEX(hash_resize_mutex); |
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static void xfrm_hash_resize(struct work_struct *__unused) |
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{ struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; unsigned long nsize, osize; unsigned int nhashmask, ohashmask; int i; mutex_lock(&hash_resize_mutex); nsize = xfrm_hash_new_size(); |
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ndst = xfrm_hash_alloc(nsize); |
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if (!ndst) goto out_unlock; |
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nsrc = xfrm_hash_alloc(nsize); |
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if (!nsrc) { |
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xfrm_hash_free(ndst, nsize); |
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goto out_unlock; } |
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nspi = xfrm_hash_alloc(nsize); |
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if (!nspi) { |
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xfrm_hash_free(ndst, nsize); xfrm_hash_free(nsrc, nsize); |
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goto out_unlock; } spin_lock_bh(&xfrm_state_lock); nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; for (i = xfrm_state_hmask; i >= 0; i--) xfrm_hash_transfer(xfrm_state_bydst+i, ndst, nsrc, nspi, nhashmask); odst = xfrm_state_bydst; osrc = xfrm_state_bysrc; ospi = xfrm_state_byspi; ohashmask = xfrm_state_hmask; xfrm_state_bydst = ndst; xfrm_state_bysrc = nsrc; xfrm_state_byspi = nspi; xfrm_state_hmask = nhashmask; spin_unlock_bh(&xfrm_state_lock); osize = (ohashmask + 1) * sizeof(struct hlist_head); |
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xfrm_hash_free(odst, osize); xfrm_hash_free(osrc, osize); xfrm_hash_free(ospi, osize); |
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out_unlock: mutex_unlock(&hash_resize_mutex); } |
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static DECLARE_WORK(xfrm_hash_work, xfrm_hash_resize); |
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DECLARE_WAIT_QUEUE_HEAD(km_waitq); EXPORT_SYMBOL(km_waitq); static DEFINE_RWLOCK(xfrm_state_afinfo_lock); static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; static struct work_struct xfrm_state_gc_work; |
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static HLIST_HEAD(xfrm_state_gc_list); |
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static DEFINE_SPINLOCK(xfrm_state_gc_lock); |
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int __xfrm_state_delete(struct xfrm_state *x); |
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int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
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void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
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static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) { struct xfrm_state_afinfo *afinfo; if (unlikely(family >= NPROTO)) return NULL; write_lock_bh(&xfrm_state_afinfo_lock); afinfo = xfrm_state_afinfo[family]; if (unlikely(!afinfo)) write_unlock_bh(&xfrm_state_afinfo_lock); return afinfo; } static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) |
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__releases(xfrm_state_afinfo_lock) |
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{ write_unlock_bh(&xfrm_state_afinfo_lock); } |
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int xfrm_register_type(const struct xfrm_type *type, unsigned short family) |
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{ struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); |
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const struct xfrm_type **typemap; |
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int err = 0; if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; typemap = afinfo->type_map; if (likely(typemap[type->proto] == NULL)) typemap[type->proto] = type; else err = -EEXIST; xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_register_type); |
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int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) |
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{ struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); |
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const struct xfrm_type **typemap; |
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int err = 0; if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; typemap = afinfo->type_map; if (unlikely(typemap[type->proto] != type)) err = -ENOENT; else typemap[type->proto] = NULL; xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_unregister_type); |
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static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) |
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{ struct xfrm_state_afinfo *afinfo; |
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const struct xfrm_type **typemap; const struct xfrm_type *type; |
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int modload_attempted = 0; retry: afinfo = xfrm_state_get_afinfo(family); if (unlikely(afinfo == NULL)) return NULL; typemap = afinfo->type_map; type = typemap[proto]; if (unlikely(type && !try_module_get(type->owner))) type = NULL; if (!type && !modload_attempted) { xfrm_state_put_afinfo(afinfo); request_module("xfrm-type-%d-%d", family, proto); modload_attempted = 1; goto retry; } xfrm_state_put_afinfo(afinfo); return type; } |
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static void xfrm_put_type(const struct xfrm_type *type) |
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{ module_put(type->owner); } int xfrm_register_mode(struct xfrm_mode *mode, int family) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode **modemap; int err; if (unlikely(mode->encap >= XFRM_MODE_MAX)) return -EINVAL; afinfo = xfrm_state_lock_afinfo(family); if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; err = -EEXIST; modemap = afinfo->mode_map; |
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if (modemap[mode->encap]) goto out; |
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err = -ENOENT; if (!try_module_get(afinfo->owner)) goto out; mode->afinfo = afinfo; modemap[mode->encap] = mode; err = 0; out: |
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xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_register_mode); int xfrm_unregister_mode(struct xfrm_mode *mode, int family) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode **modemap; int err; if (unlikely(mode->encap >= XFRM_MODE_MAX)) return -EINVAL; afinfo = xfrm_state_lock_afinfo(family); if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; err = -ENOENT; modemap = afinfo->mode_map; if (likely(modemap[mode->encap] == mode)) { modemap[mode->encap] = NULL; |
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module_put(mode->afinfo->owner); |
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err = 0; } xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_unregister_mode); static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode *mode; int modload_attempted = 0; if (unlikely(encap >= XFRM_MODE_MAX)) return NULL; retry: afinfo = xfrm_state_get_afinfo(family); if (unlikely(afinfo == NULL)) return NULL; mode = afinfo->mode_map[encap]; if (unlikely(mode && !try_module_get(mode->owner))) mode = NULL; if (!mode && !modload_attempted) { xfrm_state_put_afinfo(afinfo); request_module("xfrm-mode-%d-%d", family, encap); modload_attempted = 1; goto retry; } xfrm_state_put_afinfo(afinfo); return mode; } static void xfrm_put_mode(struct xfrm_mode *mode) { module_put(mode->owner); } |
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static void xfrm_state_gc_destroy(struct xfrm_state *x) { |
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del_timer_sync(&x->timer); del_timer_sync(&x->rtimer); |
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kfree(x->aalg); kfree(x->ealg); kfree(x->calg); kfree(x->encap); |
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kfree(x->coaddr); |
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if (x->inner_mode) xfrm_put_mode(x->inner_mode); |
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if (x->inner_mode_iaf) xfrm_put_mode(x->inner_mode_iaf); |
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if (x->outer_mode) xfrm_put_mode(x->outer_mode); |
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if (x->type) { x->type->destructor(x); xfrm_put_type(x->type); } |
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security_xfrm_state_free(x); |
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kfree(x); } |
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static void xfrm_state_gc_task(struct work_struct *data) |
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{ struct xfrm_state *x; |
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struct hlist_node *entry, *tmp; struct hlist_head gc_list; |
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spin_lock_bh(&xfrm_state_gc_lock); |
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gc_list.first = xfrm_state_gc_list.first; INIT_HLIST_HEAD(&xfrm_state_gc_list); |
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spin_unlock_bh(&xfrm_state_gc_lock); |
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hlist_for_each_entry_safe(x, entry, tmp, &gc_list, bydst) |
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xfrm_state_gc_destroy(x); |
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wake_up(&km_waitq); } static inline unsigned long make_jiffies(long secs) { if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) return MAX_SCHEDULE_TIMEOUT-1; else |
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return secs*HZ; |
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} static void xfrm_timer_handler(unsigned long data) { struct xfrm_state *x = (struct xfrm_state*)data; |
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unsigned long now = get_seconds(); |
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long next = LONG_MAX; int warn = 0; |
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int err = 0; |
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spin_lock(&x->lock); if (x->km.state == XFRM_STATE_DEAD) goto out; if (x->km.state == XFRM_STATE_EXPIRED) goto expired; if (x->lft.hard_add_expires_seconds) { long tmo = x->lft.hard_add_expires_seconds + x->curlft.add_time - now; if (tmo <= 0) goto expired; if (tmo < next) next = tmo; } if (x->lft.hard_use_expires_seconds) { long tmo = x->lft.hard_use_expires_seconds + (x->curlft.use_time ? : now) - now; if (tmo <= 0) goto expired; if (tmo < next) next = tmo; } if (x->km.dying) goto resched; if (x->lft.soft_add_expires_seconds) { long tmo = x->lft.soft_add_expires_seconds + x->curlft.add_time - now; if (tmo <= 0) warn = 1; else if (tmo < next) next = tmo; } if (x->lft.soft_use_expires_seconds) { long tmo = x->lft.soft_use_expires_seconds + (x->curlft.use_time ? : now) - now; if (tmo <= 0) warn = 1; else if (tmo < next) next = tmo; } |
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x->km.dying = warn; |
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if (warn) |
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km_state_expired(x, 0, 0); |
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resched: |
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if (next != LONG_MAX) mod_timer(&x->timer, jiffies + make_jiffies(next)); |
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goto out; expired: if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { x->km.state = XFRM_STATE_EXPIRED; wake_up(&km_waitq); next = 2; goto resched; } |
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err = __xfrm_state_delete(x); if (!err && x->id.spi) |
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km_state_expired(x, 1, 0); |
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xfrm_audit_state_delete(x, err ? 0 : 1, |
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audit_get_loginuid(current), audit_get_sessionid(current), 0); |
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out: spin_unlock(&x->lock); |
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} |
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static void xfrm_replay_timer_handler(unsigned long data); |
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struct xfrm_state *xfrm_state_alloc(void) { struct xfrm_state *x; |
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x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); |
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if (x) { |
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atomic_set(&x->refcnt, 1); atomic_set(&x->tunnel_users, 0); |
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INIT_LIST_HEAD(&x->all); |
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INIT_HLIST_NODE(&x->bydst); INIT_HLIST_NODE(&x->bysrc); INIT_HLIST_NODE(&x->byspi); |
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setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x); setup_timer(&x->rtimer, xfrm_replay_timer_handler, (unsigned long)x); |
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x->curlft.add_time = get_seconds(); |
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x->lft.soft_byte_limit = XFRM_INF; x->lft.soft_packet_limit = XFRM_INF; x->lft.hard_byte_limit = XFRM_INF; x->lft.hard_packet_limit = XFRM_INF; |
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x->replay_maxage = 0; x->replay_maxdiff = 0; |
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x->inner_mode = NULL; x->inner_mode_iaf = NULL; |
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spin_lock_init(&x->lock); } return x; } EXPORT_SYMBOL(xfrm_state_alloc); void __xfrm_state_destroy(struct xfrm_state *x) { BUG_TRAP(x->km.state == XFRM_STATE_DEAD); |
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spin_lock_bh(&xfrm_state_lock); list_del(&x->all); spin_unlock_bh(&xfrm_state_lock); |
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spin_lock_bh(&xfrm_state_gc_lock); |
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hlist_add_head(&x->bydst, &xfrm_state_gc_list); |
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spin_unlock_bh(&xfrm_state_gc_lock); schedule_work(&xfrm_state_gc_work); } EXPORT_SYMBOL(__xfrm_state_destroy); |
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int __xfrm_state_delete(struct xfrm_state *x) |
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{ |
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int err = -ESRCH; |
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526 527 528 |
if (x->km.state != XFRM_STATE_DEAD) { x->km.state = XFRM_STATE_DEAD; spin_lock(&xfrm_state_lock); |
8f126e37c
|
529 |
hlist_del(&x->bydst); |
8f126e37c
|
530 |
hlist_del(&x->bysrc); |
a47f0ce05
|
531 |
if (x->id.spi) |
8f126e37c
|
532 |
hlist_del(&x->byspi); |
f034b5d4e
|
533 |
xfrm_state_num--; |
1da177e4c
|
534 |
spin_unlock(&xfrm_state_lock); |
1da177e4c
|
535 |
|
1da177e4c
|
536 537 538 539 |
/* All xfrm_state objects are created by xfrm_state_alloc. * The xfrm_state_alloc call gives a reference, and that * is what we are dropping here. */ |
5dba47971
|
540 |
xfrm_state_put(x); |
26b15dad9
|
541 |
err = 0; |
1da177e4c
|
542 |
} |
26b15dad9
|
543 544 |
return err; |
1da177e4c
|
545 |
} |
53bc6b4d2
|
546 |
EXPORT_SYMBOL(__xfrm_state_delete); |
1da177e4c
|
547 |
|
26b15dad9
|
548 |
int xfrm_state_delete(struct xfrm_state *x) |
1da177e4c
|
549 |
{ |
26b15dad9
|
550 |
int err; |
1da177e4c
|
551 |
spin_lock_bh(&x->lock); |
26b15dad9
|
552 |
err = __xfrm_state_delete(x); |
1da177e4c
|
553 |
spin_unlock_bh(&x->lock); |
26b15dad9
|
554 555 |
return err; |
1da177e4c
|
556 557 |
} EXPORT_SYMBOL(xfrm_state_delete); |
4aa2e62c4
|
558 559 560 |
#ifdef CONFIG_SECURITY_NETWORK_XFRM static inline int xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) |
1da177e4c
|
561 |
{ |
4aa2e62c4
|
562 563 564 565 566 567 568 569 570 |
int i, err = 0; for (i = 0; i <= xfrm_state_hmask; i++) { struct hlist_node *entry; struct xfrm_state *x; hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { if (xfrm_id_proto_match(x->id.proto, proto) && (err = security_xfrm_state_delete(x)) != 0) { |
ab5f5e8b1
|
571 572 |
xfrm_audit_state_delete(x, 0, audit_info->loginuid, |
2532386f4
|
573 |
audit_info->sessionid, |
ab5f5e8b1
|
574 |
audit_info->secid); |
4aa2e62c4
|
575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 |
return err; } } } return err; } #else static inline int xfrm_state_flush_secctx_check(u8 proto, struct xfrm_audit *audit_info) { return 0; } #endif int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info) { int i, err = 0; |
1da177e4c
|
593 594 |
spin_lock_bh(&xfrm_state_lock); |
4aa2e62c4
|
595 596 597 |
err = xfrm_state_flush_secctx_check(proto, audit_info); if (err) goto out; |
a9917c066
|
598 |
for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37c
|
599 600 |
struct hlist_node *entry; struct xfrm_state *x; |
1da177e4c
|
601 |
restart: |
8f126e37c
|
602 |
hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { |
1da177e4c
|
603 |
if (!xfrm_state_kern(x) && |
5794708f1
|
604 |
xfrm_id_proto_match(x->id.proto, proto)) { |
1da177e4c
|
605 606 |
xfrm_state_hold(x); spin_unlock_bh(&xfrm_state_lock); |
161a09e73
|
607 |
err = xfrm_state_delete(x); |
ab5f5e8b1
|
608 609 |
xfrm_audit_state_delete(x, err ? 0 : 1, audit_info->loginuid, |
2532386f4
|
610 |
audit_info->sessionid, |
ab5f5e8b1
|
611 |
audit_info->secid); |
1da177e4c
|
612 613 614 615 616 617 618 |
xfrm_state_put(x); spin_lock_bh(&xfrm_state_lock); goto restart; } } } |
4aa2e62c4
|
619 620 621 |
err = 0; out: |
1da177e4c
|
622 623 |
spin_unlock_bh(&xfrm_state_lock); wake_up(&km_waitq); |
4aa2e62c4
|
624 |
return err; |
1da177e4c
|
625 626 |
} EXPORT_SYMBOL(xfrm_state_flush); |
af11e3160
|
627 |
void xfrm_sad_getinfo(struct xfrmk_sadinfo *si) |
28d8909bc
|
628 629 630 631 632 633 634 635 |
{ spin_lock_bh(&xfrm_state_lock); si->sadcnt = xfrm_state_num; si->sadhcnt = xfrm_state_hmask; si->sadhmcnt = xfrm_state_hashmax; spin_unlock_bh(&xfrm_state_lock); } EXPORT_SYMBOL(xfrm_sad_getinfo); |
1da177e4c
|
636 637 638 639 640 641 642 643 644 645 646 647 648 |
static int xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl, struct xfrm_tmpl *tmpl, xfrm_address_t *daddr, xfrm_address_t *saddr, unsigned short family) { struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); if (!afinfo) return -1; afinfo->init_tempsel(x, fl, tmpl, daddr, saddr); xfrm_state_put_afinfo(afinfo); return 0; } |
a94cfd197
|
649 |
static struct xfrm_state *__xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) |
edcd58215
|
650 651 652 |
{ unsigned int h = xfrm_spi_hash(daddr, spi, proto, family); struct xfrm_state *x; |
8f126e37c
|
653 |
struct hlist_node *entry; |
edcd58215
|
654 |
|
8f126e37c
|
655 |
hlist_for_each_entry(x, entry, xfrm_state_byspi+h, byspi) { |
edcd58215
|
656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 |
if (x->props.family != family || x->id.spi != spi || x->id.proto != proto) continue; switch (family) { case AF_INET: if (x->id.daddr.a4 != daddr->a4) continue; break; case AF_INET6: if (!ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *) x->id.daddr.a6)) continue; break; |
3ff50b799
|
672 |
} |
edcd58215
|
673 674 675 676 677 678 679 680 681 682 |
xfrm_state_hold(x); return x; } return NULL; } static struct xfrm_state *__xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family) { |
667bbcb6c
|
683 |
unsigned int h = xfrm_src_hash(daddr, saddr, family); |
edcd58215
|
684 |
struct xfrm_state *x; |
8f126e37c
|
685 |
struct hlist_node *entry; |
edcd58215
|
686 |
|
8f126e37c
|
687 |
hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { |
edcd58215
|
688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 |
if (x->props.family != family || x->id.proto != proto) continue; switch (family) { case AF_INET: if (x->id.daddr.a4 != daddr->a4 || x->props.saddr.a4 != saddr->a4) continue; break; case AF_INET6: if (!ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *) x->id.daddr.a6) || !ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *) x->props.saddr.a6)) continue; break; |
3ff50b799
|
707 |
} |
edcd58215
|
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 |
xfrm_state_hold(x); return x; } return NULL; } static inline struct xfrm_state * __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) { if (use_spi) return __xfrm_state_lookup(&x->id.daddr, x->id.spi, x->id.proto, family); else return __xfrm_state_lookup_byaddr(&x->id.daddr, &x->props.saddr, x->id.proto, family); } |
2fab22f2d
|
727 728 729 730 731 732 733 |
static void xfrm_hash_grow_check(int have_hash_collision) { if (have_hash_collision && (xfrm_state_hmask + 1) < xfrm_state_hashmax && xfrm_state_num > xfrm_state_hmask) schedule_work(&xfrm_hash_work); } |
1da177e4c
|
734 |
struct xfrm_state * |
a716c1197
|
735 |
xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4c
|
736 737 738 739 |
struct flowi *fl, struct xfrm_tmpl *tmpl, struct xfrm_policy *pol, int *err, unsigned short family) { |
4bda4f250
|
740 |
unsigned int h; |
8f126e37c
|
741 |
struct hlist_node *entry; |
1da177e4c
|
742 743 744 745 |
struct xfrm_state *x, *x0; int acquire_in_progress = 0; int error = 0; struct xfrm_state *best = NULL; |
a716c1197
|
746 |
|
1da177e4c
|
747 |
spin_lock_bh(&xfrm_state_lock); |
4bda4f250
|
748 |
h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family); |
8f126e37c
|
749 |
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
1da177e4c
|
750 751 |
if (x->props.family == family && x->props.reqid == tmpl->reqid && |
fbd9a5b47
|
752 |
!(x->props.flags & XFRM_STATE_WILDRECV) && |
1da177e4c
|
753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 |
xfrm_state_addr_check(x, daddr, saddr, family) && tmpl->mode == x->props.mode && tmpl->id.proto == x->id.proto && (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) { /* Resolution logic: 1. There is a valid state with matching selector. Done. 2. Valid state with inappropriate selector. Skip. Entering area of "sysdeps". 3. If state is not valid, selector is temporary, it selects only session which triggered previous resolution. Key manager will do something to install a state with proper selector. */ if (x->km.state == XFRM_STATE_VALID) { |
df9dcb458
|
771 |
if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) || |
e0d1caa7b
|
772 |
!security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4c
|
773 774 775 776 777 778 779 780 781 782 |
continue; if (!best || best->km.dying > x->km.dying || (best->km.dying == x->km.dying && best->curlft.add_time < x->curlft.add_time)) best = x; } else if (x->km.state == XFRM_STATE_ACQ) { acquire_in_progress = 1; } else if (x->km.state == XFRM_STATE_ERROR || x->km.state == XFRM_STATE_EXPIRED) { |
48b8d7831
|
783 |
if (xfrm_selector_match(&x->sel, fl, x->sel.family) && |
e0d1caa7b
|
784 |
security_xfrm_state_pol_flow_match(x, pol, fl)) |
1da177e4c
|
785 786 787 788 789 790 791 |
error = -ESRCH; } } } x = best; if (!x && !error && !acquire_in_progress) { |
5c5d281a9
|
792 |
if (tmpl->id.spi && |
edcd58215
|
793 794 |
(x0 = __xfrm_state_lookup(daddr, tmpl->id.spi, tmpl->id.proto, family)) != NULL) { |
1da177e4c
|
795 796 797 798 799 800 801 802 803 804 805 806 |
xfrm_state_put(x0); error = -EEXIST; goto out; } x = xfrm_state_alloc(); if (x == NULL) { error = -ENOMEM; goto out; } /* Initialize temporary selector matching only * to current session. */ xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family); |
e0d1caa7b
|
807 808 809 810 811 812 813 |
error = security_xfrm_state_alloc_acquire(x, pol->security, fl->secid); if (error) { x->km.state = XFRM_STATE_DEAD; xfrm_state_put(x); x = NULL; goto out; } |
1da177e4c
|
814 815 |
if (km_query(x, tmpl, pol) == 0) { x->km.state = XFRM_STATE_ACQ; |
8f126e37c
|
816 |
hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6c
|
817 |
h = xfrm_src_hash(daddr, saddr, family); |
8f126e37c
|
818 |
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4c
|
819 820 |
if (x->id.spi) { h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family); |
8f126e37c
|
821 |
hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4c
|
822 |
} |
01e67d08f
|
823 824 |
x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; |
1da177e4c
|
825 |
add_timer(&x->timer); |
2fab22f2d
|
826 827 |
xfrm_state_num++; xfrm_hash_grow_check(x->bydst.next != NULL); |
1da177e4c
|
828 829 830 831 832 833 834 835 836 837 838 839 840 |
} else { x->km.state = XFRM_STATE_DEAD; xfrm_state_put(x); x = NULL; error = -ESRCH; } } out: if (x) xfrm_state_hold(x); else *err = acquire_in_progress ? -EAGAIN : error; spin_unlock_bh(&xfrm_state_lock); |
1da177e4c
|
841 842 |
return x; } |
628529b6e
|
843 844 845 846 |
struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr, unsigned short family, u8 mode, u8 proto, u32 reqid) { |
4bda4f250
|
847 |
unsigned int h; |
628529b6e
|
848 849 850 851 |
struct xfrm_state *rx = NULL, *x = NULL; struct hlist_node *entry; spin_lock(&xfrm_state_lock); |
4bda4f250
|
852 |
h = xfrm_dst_hash(daddr, saddr, reqid, family); |
628529b6e
|
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 |
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { if (x->props.family == family && x->props.reqid == reqid && !(x->props.flags & XFRM_STATE_WILDRECV) && xfrm_state_addr_check(x, daddr, saddr, family) && mode == x->props.mode && proto == x->id.proto && x->km.state == XFRM_STATE_VALID) { rx = x; break; } } if (rx) xfrm_state_hold(rx); spin_unlock(&xfrm_state_lock); return rx; } EXPORT_SYMBOL(xfrm_stateonly_find); |
1da177e4c
|
874 875 |
static void __xfrm_state_insert(struct xfrm_state *x) { |
a624c108e
|
876 |
unsigned int h; |
1da177e4c
|
877 |
|
9d4a706d8
|
878 |
x->genid = ++xfrm_state_genid; |
4c563f766
|
879 |
list_add_tail(&x->all, &xfrm_state_all); |
c1969f294
|
880 881 |
h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family); |
8f126e37c
|
882 |
hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
1da177e4c
|
883 |
|
667bbcb6c
|
884 |
h = xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family); |
8f126e37c
|
885 |
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
1da177e4c
|
886 |
|
7b4dc3600
|
887 |
if (x->id.spi) { |
6c44e6b7a
|
888 889 |
h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
8f126e37c
|
890 |
hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
6c44e6b7a
|
891 |
} |
a47f0ce05
|
892 893 894 |
mod_timer(&x->timer, jiffies + HZ); if (x->replay_maxage) mod_timer(&x->rtimer, jiffies + x->replay_maxage); |
f8cd54884
|
895 |
|
1da177e4c
|
896 |
wake_up(&km_waitq); |
f034b5d4e
|
897 898 |
xfrm_state_num++; |
918049f01
|
899 |
xfrm_hash_grow_check(x->bydst.next != NULL); |
1da177e4c
|
900 |
} |
c7f5ea3a4
|
901 902 903 904 905 906 907 908 |
/* xfrm_state_lock is held */ static void __xfrm_state_bump_genids(struct xfrm_state *xnew) { unsigned short family = xnew->props.family; u32 reqid = xnew->props.reqid; struct xfrm_state *x; struct hlist_node *entry; unsigned int h; |
c1969f294
|
909 |
h = xfrm_dst_hash(&xnew->id.daddr, &xnew->props.saddr, reqid, family); |
c7f5ea3a4
|
910 911 912 |
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { if (x->props.family == family && x->props.reqid == reqid && |
c1969f294
|
913 914 |
!xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) |
c7f5ea3a4
|
915 916 917 |
x->genid = xfrm_state_genid; } } |
1da177e4c
|
918 919 920 |
void xfrm_state_insert(struct xfrm_state *x) { spin_lock_bh(&xfrm_state_lock); |
c7f5ea3a4
|
921 |
__xfrm_state_bump_genids(x); |
1da177e4c
|
922 923 924 925 |
__xfrm_state_insert(x); spin_unlock_bh(&xfrm_state_lock); } EXPORT_SYMBOL(xfrm_state_insert); |
2770834c9
|
926 927 928 |
/* xfrm_state_lock is held */ static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, int create) { |
c1969f294
|
929 |
unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family); |
8f126e37c
|
930 |
struct hlist_node *entry; |
2770834c9
|
931 |
struct xfrm_state *x; |
8f126e37c
|
932 |
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { |
2770834c9
|
933 934 935 936 |
if (x->props.reqid != reqid || x->props.mode != mode || x->props.family != family || x->km.state != XFRM_STATE_ACQ || |
75e252d98
|
937 938 |
x->id.spi != 0 || x->id.proto != proto) |
2770834c9
|
939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 |
continue; switch (family) { case AF_INET: if (x->id.daddr.a4 != daddr->a4 || x->props.saddr.a4 != saddr->a4) continue; break; case AF_INET6: if (!ipv6_addr_equal((struct in6_addr *)x->id.daddr.a6, (struct in6_addr *)daddr) || !ipv6_addr_equal((struct in6_addr *) x->props.saddr.a6, (struct in6_addr *)saddr)) continue; break; |
3ff50b799
|
955 |
} |
2770834c9
|
956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 |
xfrm_state_hold(x); return x; } if (!create) return NULL; x = xfrm_state_alloc(); if (likely(x)) { switch (family) { case AF_INET: x->sel.daddr.a4 = daddr->a4; x->sel.saddr.a4 = saddr->a4; x->sel.prefixlen_d = 32; x->sel.prefixlen_s = 32; x->props.saddr.a4 = saddr->a4; x->id.daddr.a4 = daddr->a4; break; case AF_INET6: ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, (struct in6_addr *)daddr); ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, (struct in6_addr *)saddr); x->sel.prefixlen_d = 128; x->sel.prefixlen_s = 128; ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, (struct in6_addr *)saddr); ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, (struct in6_addr *)daddr); break; |
3ff50b799
|
988 |
} |
2770834c9
|
989 990 991 992 993 994 |
x->km.state = XFRM_STATE_ACQ; x->id.proto = proto; x->props.family = family; x->props.mode = mode; x->props.reqid = reqid; |
01e67d08f
|
995 |
x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires; |
2770834c9
|
996 |
xfrm_state_hold(x); |
01e67d08f
|
997 |
x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ; |
2770834c9
|
998 |
add_timer(&x->timer); |
8f126e37c
|
999 |
hlist_add_head(&x->bydst, xfrm_state_bydst+h); |
667bbcb6c
|
1000 |
h = xfrm_src_hash(daddr, saddr, family); |
8f126e37c
|
1001 |
hlist_add_head(&x->bysrc, xfrm_state_bysrc+h); |
918049f01
|
1002 1003 1004 1005 |
xfrm_state_num++; xfrm_hash_grow_check(x->bydst.next != NULL); |
2770834c9
|
1006 1007 1008 1009 |
} return x; } |
1da177e4c
|
1010 1011 1012 1013 |
static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq); int xfrm_state_add(struct xfrm_state *x) { |
1da177e4c
|
1014 1015 1016 |
struct xfrm_state *x1; int family; int err; |
eb2971b68
|
1017 |
int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4c
|
1018 1019 |
family = x->props.family; |
1da177e4c
|
1020 1021 |
spin_lock_bh(&xfrm_state_lock); |
edcd58215
|
1022 |
x1 = __xfrm_state_locate(x, use_spi, family); |
1da177e4c
|
1023 1024 1025 1026 1027 1028 |
if (x1) { xfrm_state_put(x1); x1 = NULL; err = -EEXIST; goto out; } |
eb2971b68
|
1029 |
if (use_spi && x->km.seq) { |
1da177e4c
|
1030 |
x1 = __xfrm_find_acq_byseq(x->km.seq); |
75e252d98
|
1031 1032 |
if (x1 && ((x1->id.proto != x->id.proto) || xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { |
1da177e4c
|
1033 1034 1035 1036 |
xfrm_state_put(x1); x1 = NULL; } } |
eb2971b68
|
1037 |
if (use_spi && !x1) |
2770834c9
|
1038 1039 1040 |
x1 = __find_acq_core(family, x->props.mode, x->props.reqid, x->id.proto, &x->id.daddr, &x->props.saddr, 0); |
1da177e4c
|
1041 |
|
c7f5ea3a4
|
1042 |
__xfrm_state_bump_genids(x); |
1da177e4c
|
1043 1044 1045 1046 1047 |
__xfrm_state_insert(x); err = 0; out: spin_unlock_bh(&xfrm_state_lock); |
1da177e4c
|
1048 1049 1050 1051 1052 1053 1054 1055 1056 |
if (x1) { xfrm_state_delete(x1); xfrm_state_put(x1); } return err; } EXPORT_SYMBOL(xfrm_state_add); |
80c9abaab
|
1057 |
#ifdef CONFIG_XFRM_MIGRATE |
6666351df
|
1058 |
static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) |
80c9abaab
|
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 |
{ int err = -ENOMEM; struct xfrm_state *x = xfrm_state_alloc(); if (!x) goto error; memcpy(&x->id, &orig->id, sizeof(x->id)); memcpy(&x->sel, &orig->sel, sizeof(x->sel)); memcpy(&x->lft, &orig->lft, sizeof(x->lft)); x->props.mode = orig->props.mode; x->props.replay_window = orig->props.replay_window; x->props.reqid = orig->props.reqid; x->props.family = orig->props.family; x->props.saddr = orig->props.saddr; if (orig->aalg) { x->aalg = xfrm_algo_clone(orig->aalg); if (!x->aalg) goto error; } x->props.aalgo = orig->props.aalgo; if (orig->ealg) { x->ealg = xfrm_algo_clone(orig->ealg); if (!x->ealg) goto error; } x->props.ealgo = orig->props.ealgo; if (orig->calg) { x->calg = xfrm_algo_clone(orig->calg); if (!x->calg) goto error; } x->props.calgo = orig->props.calgo; |
a716c1197
|
1094 |
if (orig->encap) { |
80c9abaab
|
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 |
x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); if (!x->encap) goto error; } if (orig->coaddr) { x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), GFP_KERNEL); if (!x->coaddr) goto error; } err = xfrm_init_state(x); if (err) goto error; x->props.flags = orig->props.flags; x->curlft.add_time = orig->curlft.add_time; x->km.state = orig->km.state; x->km.seq = orig->km.seq; return x; error: if (errp) *errp = err; if (x) { kfree(x->aalg); kfree(x->ealg); kfree(x->calg); kfree(x->encap); kfree(x->coaddr); } kfree(x); return NULL; } |
80c9abaab
|
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 |
/* xfrm_state_lock is held */ struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) { unsigned int h; struct xfrm_state *x; struct hlist_node *entry; if (m->reqid) { h = xfrm_dst_hash(&m->old_daddr, &m->old_saddr, m->reqid, m->old_family); hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) { if (x->props.mode != m->mode || x->id.proto != m->proto) continue; if (m->reqid && x->props.reqid != m->reqid) continue; if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, m->old_family) || xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, m->old_family)) continue; xfrm_state_hold(x); return x; } } else { h = xfrm_src_hash(&m->old_daddr, &m->old_saddr, m->old_family); hlist_for_each_entry(x, entry, xfrm_state_bysrc+h, bysrc) { if (x->props.mode != m->mode || x->id.proto != m->proto) continue; if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, m->old_family) || xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, m->old_family)) continue; xfrm_state_hold(x); return x; } } |
a716c1197
|
1173 |
return NULL; |
80c9abaab
|
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 |
} EXPORT_SYMBOL(xfrm_migrate_state_find); struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, struct xfrm_migrate *m) { struct xfrm_state *xc; int err; xc = xfrm_state_clone(x, &err); if (!xc) return NULL; memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); /* add state */ if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { /* a care is needed when the destination address of the state is to be updated as it is a part of triplet */ xfrm_state_insert(xc); } else { if ((err = xfrm_state_add(xc)) < 0) goto error; } return xc; error: kfree(xc); return NULL; } EXPORT_SYMBOL(xfrm_state_migrate); #endif |
1da177e4c
|
1207 1208 |
int xfrm_state_update(struct xfrm_state *x) { |
1da177e4c
|
1209 1210 |
struct xfrm_state *x1; int err; |
eb2971b68
|
1211 |
int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); |
1da177e4c
|
1212 |
|
1da177e4c
|
1213 |
spin_lock_bh(&xfrm_state_lock); |
edcd58215
|
1214 |
x1 = __xfrm_state_locate(x, use_spi, x->props.family); |
1da177e4c
|
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 |
err = -ESRCH; if (!x1) goto out; if (xfrm_state_kern(x1)) { xfrm_state_put(x1); err = -EEXIST; goto out; } if (x1->km.state == XFRM_STATE_ACQ) { __xfrm_state_insert(x); x = NULL; } err = 0; out: spin_unlock_bh(&xfrm_state_lock); |
1da177e4c
|
1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 |
if (err) return err; if (!x) { xfrm_state_delete(x1); xfrm_state_put(x1); return 0; } err = -EINVAL; spin_lock_bh(&x1->lock); if (likely(x1->km.state == XFRM_STATE_VALID)) { if (x->encap && x1->encap) memcpy(x1->encap, x->encap, sizeof(*x1->encap)); |
060f02a3b
|
1249 1250 1251 1252 1253 |
if (x->coaddr && x1->coaddr) { memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); } if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); |
1da177e4c
|
1254 1255 |
memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); x1->km.dying = 0; |
a47f0ce05
|
1256 |
mod_timer(&x1->timer, jiffies + HZ); |
1da177e4c
|
1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 |
if (x1->curlft.use_time) xfrm_state_check_expire(x1); err = 0; } spin_unlock_bh(&x1->lock); xfrm_state_put(x1); return err; } EXPORT_SYMBOL(xfrm_state_update); int xfrm_state_check_expire(struct xfrm_state *x) { if (!x->curlft.use_time) |
9d729f72d
|
1273 |
x->curlft.use_time = get_seconds(); |
1da177e4c
|
1274 1275 1276 1277 1278 1279 |
if (x->km.state != XFRM_STATE_VALID) return -EINVAL; if (x->curlft.bytes >= x->lft.hard_byte_limit || x->curlft.packets >= x->lft.hard_packet_limit) { |
4666faab0
|
1280 |
x->km.state = XFRM_STATE_EXPIRED; |
a47f0ce05
|
1281 |
mod_timer(&x->timer, jiffies); |
1da177e4c
|
1282 1283 1284 1285 1286 |
return -EINVAL; } if (!x->km.dying && (x->curlft.bytes >= x->lft.soft_byte_limit || |
4666faab0
|
1287 1288 |
x->curlft.packets >= x->lft.soft_packet_limit)) { x->km.dying = 1; |
53bc6b4d2
|
1289 |
km_state_expired(x, 0, 0); |
4666faab0
|
1290 |
} |
1da177e4c
|
1291 1292 1293 |
return 0; } EXPORT_SYMBOL(xfrm_state_check_expire); |
1da177e4c
|
1294 |
struct xfrm_state * |
a94cfd197
|
1295 |
xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, |
1da177e4c
|
1296 1297 1298 |
unsigned short family) { struct xfrm_state *x; |
1da177e4c
|
1299 1300 |
spin_lock_bh(&xfrm_state_lock); |
edcd58215
|
1301 |
x = __xfrm_state_lookup(daddr, spi, proto, family); |
1da177e4c
|
1302 |
spin_unlock_bh(&xfrm_state_lock); |
1da177e4c
|
1303 1304 1305 1306 1307 |
return x; } EXPORT_SYMBOL(xfrm_state_lookup); struct xfrm_state * |
eb2971b68
|
1308 1309 1310 1311 |
xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family) { struct xfrm_state *x; |
eb2971b68
|
1312 1313 |
spin_lock_bh(&xfrm_state_lock); |
edcd58215
|
1314 |
x = __xfrm_state_lookup_byaddr(daddr, saddr, proto, family); |
eb2971b68
|
1315 |
spin_unlock_bh(&xfrm_state_lock); |
eb2971b68
|
1316 1317 1318 1319 1320 |
return x; } EXPORT_SYMBOL(xfrm_state_lookup_byaddr); struct xfrm_state * |
a716c1197
|
1321 1322 |
xfrm_find_acq(u8 mode, u32 reqid, u8 proto, xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4c
|
1323 1324 1325 |
int create, unsigned short family) { struct xfrm_state *x; |
1da177e4c
|
1326 1327 |
spin_lock_bh(&xfrm_state_lock); |
2770834c9
|
1328 |
x = __find_acq_core(family, mode, reqid, proto, daddr, saddr, create); |
1da177e4c
|
1329 |
spin_unlock_bh(&xfrm_state_lock); |
2770834c9
|
1330 |
|
1da177e4c
|
1331 1332 1333 |
return x; } EXPORT_SYMBOL(xfrm_find_acq); |
41a49cc3c
|
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 |
#ifdef CONFIG_XFRM_SUB_POLICY int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, unsigned short family) { int err = 0; struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); if (!afinfo) return -EAFNOSUPPORT; spin_lock_bh(&xfrm_state_lock); if (afinfo->tmpl_sort) err = afinfo->tmpl_sort(dst, src, n); spin_unlock_bh(&xfrm_state_lock); xfrm_state_put_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_tmpl_sort); int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, unsigned short family) { int err = 0; struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); if (!afinfo) return -EAFNOSUPPORT; spin_lock_bh(&xfrm_state_lock); if (afinfo->state_sort) err = afinfo->state_sort(dst, src, n); spin_unlock_bh(&xfrm_state_lock); xfrm_state_put_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_state_sort); #endif |
1da177e4c
|
1371 1372 1373 1374 1375 |
/* Silly enough, but I'm lazy to build resolution list */ static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq) { int i; |
1da177e4c
|
1376 |
|
f034b5d4e
|
1377 |
for (i = 0; i <= xfrm_state_hmask; i++) { |
8f126e37c
|
1378 1379 1380 1381 1382 1383 |
struct hlist_node *entry; struct xfrm_state *x; hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) { if (x->km.seq == seq && x->km.state == XFRM_STATE_ACQ) { |
1da177e4c
|
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 |
xfrm_state_hold(x); return x; } } } return NULL; } struct xfrm_state *xfrm_find_acq_byseq(u32 seq) { struct xfrm_state *x; spin_lock_bh(&xfrm_state_lock); x = __xfrm_find_acq_byseq(seq); spin_unlock_bh(&xfrm_state_lock); return x; } EXPORT_SYMBOL(xfrm_find_acq_byseq); u32 xfrm_get_acqseq(void) { u32 res; static u32 acqseq; static DEFINE_SPINLOCK(acqseq_lock); spin_lock_bh(&acqseq_lock); res = (++acqseq ? : ++acqseq); spin_unlock_bh(&acqseq_lock); return res; } EXPORT_SYMBOL(xfrm_get_acqseq); |
658b219e9
|
1415 |
int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) |
1da177e4c
|
1416 |
{ |
f034b5d4e
|
1417 |
unsigned int h; |
1da177e4c
|
1418 |
struct xfrm_state *x0; |
658b219e9
|
1419 1420 1421 |
int err = -ENOENT; __be32 minspi = htonl(low); __be32 maxspi = htonl(high); |
1da177e4c
|
1422 |
|
658b219e9
|
1423 1424 1425 1426 1427 |
spin_lock_bh(&x->lock); if (x->km.state == XFRM_STATE_DEAD) goto unlock; err = 0; |
1da177e4c
|
1428 |
if (x->id.spi) |
658b219e9
|
1429 1430 1431 |
goto unlock; err = -ENOENT; |
1da177e4c
|
1432 1433 1434 1435 1436 |
if (minspi == maxspi) { x0 = xfrm_state_lookup(&x->id.daddr, minspi, x->id.proto, x->props.family); if (x0) { xfrm_state_put(x0); |
658b219e9
|
1437 |
goto unlock; |
1da177e4c
|
1438 1439 1440 1441 |
} x->id.spi = minspi; } else { u32 spi = 0; |
26977b4ed
|
1442 1443 |
for (h=0; h<high-low+1; h++) { spi = low + net_random()%(high-low+1); |
1da177e4c
|
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 |
x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family); if (x0 == NULL) { x->id.spi = htonl(spi); break; } xfrm_state_put(x0); } } if (x->id.spi) { spin_lock_bh(&xfrm_state_lock); h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family); |
8f126e37c
|
1455 |
hlist_add_head(&x->byspi, xfrm_state_byspi+h); |
1da177e4c
|
1456 |
spin_unlock_bh(&xfrm_state_lock); |
658b219e9
|
1457 1458 |
err = 0; |
1da177e4c
|
1459 |
} |
658b219e9
|
1460 1461 1462 1463 1464 |
unlock: spin_unlock_bh(&x->lock); return err; |
1da177e4c
|
1465 1466 |
} EXPORT_SYMBOL(xfrm_alloc_spi); |
4c563f766
|
1467 1468 |
int xfrm_state_walk(struct xfrm_state_walk *walk, int (*func)(struct xfrm_state *, int, void*), |
1da177e4c
|
1469 1470 |
void *data) { |
4c563f766
|
1471 |
struct xfrm_state *old, *x, *last = NULL; |
1da177e4c
|
1472 |
int err = 0; |
4c563f766
|
1473 1474 1475 1476 1477 |
if (walk->state == NULL && walk->count != 0) return 0; old = x = walk->state; walk->state = NULL; |
1da177e4c
|
1478 |
spin_lock_bh(&xfrm_state_lock); |
4c563f766
|
1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 |
if (x == NULL) x = list_first_entry(&xfrm_state_all, struct xfrm_state, all); list_for_each_entry_from(x, &xfrm_state_all, all) { if (x->km.state == XFRM_STATE_DEAD) continue; if (!xfrm_id_proto_match(x->id.proto, walk->proto)) continue; if (last) { err = func(last, walk->count, data); if (err) { xfrm_state_hold(last); walk->state = last; goto out; |
94b9bb548
|
1492 |
} |
1da177e4c
|
1493 |
} |
4c563f766
|
1494 1495 |
last = x; walk->count++; |
1da177e4c
|
1496 |
} |
4c563f766
|
1497 |
if (walk->count == 0) { |
1da177e4c
|
1498 1499 1500 |
err = -ENOENT; goto out; } |
4c563f766
|
1501 1502 |
if (last) err = func(last, 0, data); |
1da177e4c
|
1503 1504 |
out: spin_unlock_bh(&xfrm_state_lock); |
4c563f766
|
1505 1506 |
if (old != NULL) xfrm_state_put(old); |
1da177e4c
|
1507 1508 1509 |
return err; } EXPORT_SYMBOL(xfrm_state_walk); |
f8cd54884
|
1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 |
void xfrm_replay_notify(struct xfrm_state *x, int event) { struct km_event c; /* we send notify messages in case * 1. we updated on of the sequence numbers, and the seqno difference * is at least x->replay_maxdiff, in this case we also update the * timeout of our timer function * 2. if x->replay_maxage has elapsed since last update, * and there were changes * * The state structure must be locked! */ switch (event) { case XFRM_REPLAY_UPDATE: if (x->replay_maxdiff && (x->replay.seq - x->preplay.seq < x->replay_maxdiff) && |
2717096ab
|
1528 1529 1530 1531 1532 1533 |
(x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) { if (x->xflags & XFRM_TIME_DEFER) event = XFRM_REPLAY_TIMEOUT; else return; } |
f8cd54884
|
1534 1535 1536 1537 1538 1539 |
break; case XFRM_REPLAY_TIMEOUT: if ((x->replay.seq == x->preplay.seq) && (x->replay.bitmap == x->preplay.bitmap) && |
2717096ab
|
1540 1541 |
(x->replay.oseq == x->preplay.oseq)) { x->xflags |= XFRM_TIME_DEFER; |
f8cd54884
|
1542 |
return; |
2717096ab
|
1543 |
} |
f8cd54884
|
1544 1545 1546 1547 1548 1549 1550 1551 |
break; } memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state)); c.event = XFRM_MSG_NEWAE; c.data.aevent = event; km_state_notify(x, &c); |
f8cd54884
|
1552 |
if (x->replay_maxage && |
a47f0ce05
|
1553 |
!mod_timer(&x->rtimer, jiffies + x->replay_maxage)) |
2717096ab
|
1554 |
x->xflags &= ~XFRM_TIME_DEFER; |
f8cd54884
|
1555 1556 1557 1558 1559 1560 1561 |
} static void xfrm_replay_timer_handler(unsigned long data) { struct xfrm_state *x = (struct xfrm_state*)data; spin_lock(&x->lock); |
2717096ab
|
1562 1563 1564 1565 1566 1567 |
if (x->km.state == XFRM_STATE_VALID) { if (xfrm_aevent_is_on()) xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT); else x->xflags |= XFRM_TIME_DEFER; } |
f8cd54884
|
1568 1569 1570 |
spin_unlock(&x->lock); } |
afeb14b49
|
1571 1572 |
int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq) |
1da177e4c
|
1573 1574 |
{ u32 diff; |
a252cc237
|
1575 |
u32 seq = ntohl(net_seq); |
1da177e4c
|
1576 1577 |
if (unlikely(seq == 0)) |
afeb14b49
|
1578 |
goto err; |
1da177e4c
|
1579 1580 1581 1582 1583 |
if (likely(seq > x->replay.seq)) return 0; diff = x->replay.seq - seq; |
4c4d51a73
|
1584 1585 |
if (diff >= min_t(unsigned int, x->props.replay_window, sizeof(x->replay.bitmap) * 8)) { |
1da177e4c
|
1586 |
x->stats.replay_window++; |
afeb14b49
|
1587 |
goto err; |
1da177e4c
|
1588 1589 1590 1591 |
} if (x->replay.bitmap & (1U << diff)) { x->stats.replay++; |
afeb14b49
|
1592 |
goto err; |
1da177e4c
|
1593 1594 |
} return 0; |
afeb14b49
|
1595 1596 1597 1598 |
err: xfrm_audit_state_replay(x, skb, net_seq); return -EINVAL; |
1da177e4c
|
1599 |
} |
1da177e4c
|
1600 |
|
61f4627b2
|
1601 |
void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq) |
1da177e4c
|
1602 1603 |
{ u32 diff; |
61f4627b2
|
1604 |
u32 seq = ntohl(net_seq); |
1da177e4c
|
1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 |
if (seq > x->replay.seq) { diff = seq - x->replay.seq; if (diff < x->props.replay_window) x->replay.bitmap = ((x->replay.bitmap) << diff) | 1; else x->replay.bitmap = 1; x->replay.seq = seq; } else { diff = x->replay.seq - seq; x->replay.bitmap |= (1U << diff); } |
f8cd54884
|
1617 1618 1619 |
if (xfrm_aevent_is_on()) xfrm_replay_notify(x, XFRM_REPLAY_UPDATE); |
1da177e4c
|
1620 |
} |
1da177e4c
|
1621 |
|
df01812eb
|
1622 |
static LIST_HEAD(xfrm_km_list); |
1da177e4c
|
1623 |
static DEFINE_RWLOCK(xfrm_km_lock); |
26b15dad9
|
1624 |
void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) |
1da177e4c
|
1625 1626 |
{ struct xfrm_mgr *km; |
26b15dad9
|
1627 1628 1629 1630 1631 1632 |
read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) if (km->notify_policy) km->notify_policy(xp, dir, c); read_unlock(&xfrm_km_lock); } |
1da177e4c
|
1633 |
|
26b15dad9
|
1634 1635 1636 |
void km_state_notify(struct xfrm_state *x, struct km_event *c) { struct xfrm_mgr *km; |
1da177e4c
|
1637 1638 |
read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) |
26b15dad9
|
1639 1640 |
if (km->notify) km->notify(x, c); |
1da177e4c
|
1641 |
read_unlock(&xfrm_km_lock); |
26b15dad9
|
1642 1643 1644 1645 |
} EXPORT_SYMBOL(km_policy_notify); EXPORT_SYMBOL(km_state_notify); |
53bc6b4d2
|
1646 |
void km_state_expired(struct xfrm_state *x, int hard, u32 pid) |
26b15dad9
|
1647 1648 |
{ struct km_event c; |
bf08867f9
|
1649 |
c.data.hard = hard; |
53bc6b4d2
|
1650 |
c.pid = pid; |
f60f6b8f7
|
1651 |
c.event = XFRM_MSG_EXPIRE; |
26b15dad9
|
1652 |
km_state_notify(x, &c); |
1da177e4c
|
1653 1654 1655 1656 |
if (hard) wake_up(&km_waitq); } |
53bc6b4d2
|
1657 |
EXPORT_SYMBOL(km_state_expired); |
26b15dad9
|
1658 1659 1660 1661 |
/* * We send to all registered managers regardless of failure * We are happy with one success */ |
980ebd257
|
1662 |
int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) |
1da177e4c
|
1663 |
{ |
26b15dad9
|
1664 |
int err = -EINVAL, acqret; |
1da177e4c
|
1665 1666 1667 1668 |
struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { |
26b15dad9
|
1669 1670 1671 |
acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); if (!acqret) err = acqret; |
1da177e4c
|
1672 1673 1674 1675 |
} read_unlock(&xfrm_km_lock); return err; } |
980ebd257
|
1676 |
EXPORT_SYMBOL(km_query); |
1da177e4c
|
1677 |
|
5d36b1803
|
1678 |
int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) |
1da177e4c
|
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 |
{ int err = -EINVAL; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { if (km->new_mapping) err = km->new_mapping(x, ipaddr, sport); if (!err) break; } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_new_mapping); |
6c5c8ca7f
|
1694 |
void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) |
1da177e4c
|
1695 |
{ |
26b15dad9
|
1696 |
struct km_event c; |
1da177e4c
|
1697 |
|
bf08867f9
|
1698 |
c.data.hard = hard; |
6c5c8ca7f
|
1699 |
c.pid = pid; |
f60f6b8f7
|
1700 |
c.event = XFRM_MSG_POLEXPIRE; |
26b15dad9
|
1701 |
km_policy_notify(pol, dir, &c); |
1da177e4c
|
1702 1703 1704 1705 |
if (hard) wake_up(&km_waitq); } |
a70fcb0ba
|
1706 |
EXPORT_SYMBOL(km_policy_expired); |
1da177e4c
|
1707 |
|
2d60abc2a
|
1708 |
#ifdef CONFIG_XFRM_MIGRATE |
80c9abaab
|
1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 |
int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_migrate) { int err = -EINVAL; int ret; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { if (km->migrate) { ret = km->migrate(sel, dir, type, m, num_migrate); if (!ret) err = ret; } } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_migrate); |
2d60abc2a
|
1728 |
#endif |
80c9abaab
|
1729 |
|
97a64b457
|
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 |
int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) { int err = -EINVAL; int ret; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { if (km->report) { ret = km->report(proto, sel, addr); if (!ret) err = ret; } } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_report); |
1da177e4c
|
1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 |
int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) { int err; u8 *data; struct xfrm_mgr *km; struct xfrm_policy *pol = NULL; if (optlen <= 0 || optlen > PAGE_SIZE) return -EMSGSIZE; data = kmalloc(optlen, GFP_KERNEL); if (!data) return -ENOMEM; err = -EFAULT; if (copy_from_user(data, optval, optlen)) goto out; err = -EINVAL; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { |
cb969f072
|
1769 |
pol = km->compile_policy(sk, optname, data, |
1da177e4c
|
1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 |
optlen, &err); if (err >= 0) break; } read_unlock(&xfrm_km_lock); if (err >= 0) { xfrm_sk_policy_insert(sk, err, pol); xfrm_pol_put(pol); err = 0; } out: kfree(data); return err; } EXPORT_SYMBOL(xfrm_user_policy); int xfrm_register_km(struct xfrm_mgr *km) { write_lock_bh(&xfrm_km_lock); list_add_tail(&km->list, &xfrm_km_list); write_unlock_bh(&xfrm_km_lock); return 0; } EXPORT_SYMBOL(xfrm_register_km); int xfrm_unregister_km(struct xfrm_mgr *km) { write_lock_bh(&xfrm_km_lock); list_del(&km->list); write_unlock_bh(&xfrm_km_lock); return 0; } EXPORT_SYMBOL(xfrm_unregister_km); int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) { int err = 0; if (unlikely(afinfo == NULL)) return -EINVAL; if (unlikely(afinfo->family >= NPROTO)) return -EAFNOSUPPORT; |
f3111502c
|
1813 |
write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4c
|
1814 1815 |
if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) err = -ENOBUFS; |
edcd58215
|
1816 |
else |
1da177e4c
|
1817 |
xfrm_state_afinfo[afinfo->family] = afinfo; |
f3111502c
|
1818 |
write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4c
|
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 |
return err; } EXPORT_SYMBOL(xfrm_state_register_afinfo); int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) { int err = 0; if (unlikely(afinfo == NULL)) return -EINVAL; if (unlikely(afinfo->family >= NPROTO)) return -EAFNOSUPPORT; |
f3111502c
|
1830 |
write_lock_bh(&xfrm_state_afinfo_lock); |
1da177e4c
|
1831 1832 1833 |
if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) err = -EINVAL; |
edcd58215
|
1834 |
else |
1da177e4c
|
1835 |
xfrm_state_afinfo[afinfo->family] = NULL; |
1da177e4c
|
1836 |
} |
f3111502c
|
1837 |
write_unlock_bh(&xfrm_state_afinfo_lock); |
1da177e4c
|
1838 1839 1840 |
return err; } EXPORT_SYMBOL(xfrm_state_unregister_afinfo); |
17c2a42a2
|
1841 |
static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) |
1da177e4c
|
1842 1843 1844 1845 1846 1847 |
{ struct xfrm_state_afinfo *afinfo; if (unlikely(family >= NPROTO)) return NULL; read_lock(&xfrm_state_afinfo_lock); afinfo = xfrm_state_afinfo[family]; |
546be2405
|
1848 1849 |
if (unlikely(!afinfo)) read_unlock(&xfrm_state_afinfo_lock); |
1da177e4c
|
1850 1851 |
return afinfo; } |
17c2a42a2
|
1852 |
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) |
9a429c498
|
1853 |
__releases(xfrm_state_afinfo_lock) |
1da177e4c
|
1854 |
{ |
546be2405
|
1855 |
read_unlock(&xfrm_state_afinfo_lock); |
1da177e4c
|
1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 |
} /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ void xfrm_state_delete_tunnel(struct xfrm_state *x) { if (x->tunnel) { struct xfrm_state *t = x->tunnel; if (atomic_read(&t->tunnel_users) == 2) xfrm_state_delete(t); atomic_dec(&t->tunnel_users); xfrm_state_put(t); x->tunnel = NULL; } } EXPORT_SYMBOL(xfrm_state_delete_tunnel); int xfrm_state_mtu(struct xfrm_state *x, int mtu) { |
c5c252389
|
1875 |
int res; |
1da177e4c
|
1876 |
|
c5c252389
|
1877 1878 1879 1880 1881 |
spin_lock_bh(&x->lock); if (x->km.state == XFRM_STATE_VALID && x->type && x->type->get_mtu) res = x->type->get_mtu(x, mtu); else |
281216177
|
1882 |
res = mtu - x->props.header_len; |
c5c252389
|
1883 |
spin_unlock_bh(&x->lock); |
1da177e4c
|
1884 1885 |
return res; } |
72cb6962a
|
1886 1887 |
int xfrm_init_state(struct xfrm_state *x) { |
d094cd83c
|
1888 |
struct xfrm_state_afinfo *afinfo; |
df9dcb458
|
1889 |
struct xfrm_mode *inner_mode; |
d094cd83c
|
1890 |
int family = x->props.family; |
72cb6962a
|
1891 |
int err; |
d094cd83c
|
1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 |
err = -EAFNOSUPPORT; afinfo = xfrm_state_get_afinfo(family); if (!afinfo) goto error; err = 0; if (afinfo->init_flags) err = afinfo->init_flags(x); xfrm_state_put_afinfo(afinfo); if (err) goto error; err = -EPROTONOSUPPORT; |
13996378e
|
1907 |
|
df9dcb458
|
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 |
if (x->sel.family != AF_UNSPEC) { inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); if (inner_mode == NULL) goto error; if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && family != x->sel.family) { xfrm_put_mode(inner_mode); goto error; } x->inner_mode = inner_mode; } else { struct xfrm_mode *inner_mode_iaf; inner_mode = xfrm_get_mode(x->props.mode, AF_INET); if (inner_mode == NULL) goto error; if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { xfrm_put_mode(inner_mode); goto error; } inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6); if (inner_mode_iaf == NULL) goto error; if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) { xfrm_put_mode(inner_mode_iaf); goto error; } if (x->props.family == AF_INET) { x->inner_mode = inner_mode; x->inner_mode_iaf = inner_mode_iaf; } else { x->inner_mode = inner_mode_iaf; x->inner_mode_iaf = inner_mode; } } |
13996378e
|
1949 |
|
d094cd83c
|
1950 |
x->type = xfrm_get_type(x->id.proto, family); |
72cb6962a
|
1951 1952 1953 1954 1955 1956 |
if (x->type == NULL) goto error; err = x->type->init_state(x); if (err) goto error; |
13996378e
|
1957 1958 |
x->outer_mode = xfrm_get_mode(x->props.mode, family); if (x->outer_mode == NULL) |
b59f45d0b
|
1959 |
goto error; |
72cb6962a
|
1960 1961 1962 1963 1964 1965 1966 |
x->km.state = XFRM_STATE_VALID; error: return err; } EXPORT_SYMBOL(xfrm_init_state); |
a716c1197
|
1967 |
|
1da177e4c
|
1968 1969 |
void __init xfrm_state_init(void) { |
f034b5d4e
|
1970 1971 1972 |
unsigned int sz; sz = sizeof(struct hlist_head) * 8; |
44e36b42a
|
1973 1974 1975 |
xfrm_state_bydst = xfrm_hash_alloc(sz); xfrm_state_bysrc = xfrm_hash_alloc(sz); xfrm_state_byspi = xfrm_hash_alloc(sz); |
f034b5d4e
|
1976 1977 1978 |
if (!xfrm_state_bydst || !xfrm_state_bysrc || !xfrm_state_byspi) panic("XFRM: Cannot allocate bydst/bysrc/byspi hashes."); xfrm_state_hmask = ((sz / sizeof(struct hlist_head)) - 1); |
1da177e4c
|
1979 |
|
c4028958b
|
1980 |
INIT_WORK(&xfrm_state_gc_work, xfrm_state_gc_task); |
1da177e4c
|
1981 |
} |
ab5f5e8b1
|
1982 |
#ifdef CONFIG_AUDITSYSCALL |
cf35f43e6
|
1983 1984 |
static void xfrm_audit_helper_sainfo(struct xfrm_state *x, struct audit_buffer *audit_buf) |
ab5f5e8b1
|
1985 |
{ |
68277accb
|
1986 1987 1988 1989 |
struct xfrm_sec_ctx *ctx = x->security; u32 spi = ntohl(x->id.spi); if (ctx) |
ab5f5e8b1
|
1990 |
audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", |
68277accb
|
1991 |
ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); |
ab5f5e8b1
|
1992 1993 1994 |
switch(x->props.family) { case AF_INET: |
68277accb
|
1995 1996 |
audit_log_format(audit_buf, " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, |
ab5f5e8b1
|
1997 1998 1999 2000 |
NIPQUAD(x->props.saddr.a4), NIPQUAD(x->id.daddr.a4)); break; case AF_INET6: |
68277accb
|
2001 2002 2003 2004 |
audit_log_format(audit_buf, " src=" NIP6_FMT " dst=" NIP6_FMT, NIP6(*(struct in6_addr *)x->props.saddr.a6), NIP6(*(struct in6_addr *)x->id.daddr.a6)); |
ab5f5e8b1
|
2005 2006 |
break; } |
68277accb
|
2007 2008 |
audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); |
ab5f5e8b1
|
2009 |
} |
cf35f43e6
|
2010 2011 |
static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, struct audit_buffer *audit_buf) |
afeb14b49
|
2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 |
{ struct iphdr *iph4; struct ipv6hdr *iph6; switch (family) { case AF_INET: iph4 = ip_hdr(skb); audit_log_format(audit_buf, " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT, NIPQUAD(iph4->saddr), NIPQUAD(iph4->daddr)); break; case AF_INET6: iph6 = ipv6_hdr(skb); audit_log_format(audit_buf, " src=" NIP6_FMT " dst=" NIP6_FMT |
5e2c433d9
|
2028 |
" flowlbl=0x%x%02x%02x", |
afeb14b49
|
2029 2030 2031 2032 2033 2034 2035 2036 |
NIP6(iph6->saddr), NIP6(iph6->daddr), iph6->flow_lbl[0] & 0x0f, iph6->flow_lbl[1], iph6->flow_lbl[2]); break; } } |
68277accb
|
2037 |
void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2532386f4
|
2038 |
uid_t auid, u32 sessionid, u32 secid) |
ab5f5e8b1
|
2039 2040 |
{ struct audit_buffer *audit_buf; |
ab5f5e8b1
|
2041 |
|
afeb14b49
|
2042 |
audit_buf = xfrm_audit_start("SAD-add"); |
ab5f5e8b1
|
2043 2044 |
if (audit_buf == NULL) return; |
2532386f4
|
2045 |
xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b49
|
2046 2047 |
xfrm_audit_helper_sainfo(x, audit_buf); audit_log_format(audit_buf, " res=%u", result); |
ab5f5e8b1
|
2048 2049 2050 |
audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_add); |
68277accb
|
2051 |
void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2532386f4
|
2052 |
uid_t auid, u32 sessionid, u32 secid) |
ab5f5e8b1
|
2053 2054 |
{ struct audit_buffer *audit_buf; |
ab5f5e8b1
|
2055 |
|
afeb14b49
|
2056 |
audit_buf = xfrm_audit_start("SAD-delete"); |
ab5f5e8b1
|
2057 2058 |
if (audit_buf == NULL) return; |
2532386f4
|
2059 |
xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); |
afeb14b49
|
2060 2061 |
xfrm_audit_helper_sainfo(x, audit_buf); audit_log_format(audit_buf, " res=%u", result); |
ab5f5e8b1
|
2062 2063 2064 |
audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); |
afeb14b49
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void xfrm_audit_state_replay_overflow(struct xfrm_state *x, struct sk_buff *skb) { struct audit_buffer *audit_buf; u32 spi; audit_buf = xfrm_audit_start("SA-replay-overflow"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); /* don't record the sequence number because it's inherent in this kind * of audit message */ spi = ntohl(x->id.spi); audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); static void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq) { struct audit_buffer *audit_buf; u32 spi; audit_buf = xfrm_audit_start("SA-replayed-pkt"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); spi = ntohl(x->id.spi); audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", spi, spi, ntohl(net_seq)); audit_log_end(audit_buf); } void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) { struct audit_buffer *audit_buf; audit_buf = xfrm_audit_start("SA-notfound"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, family, audit_buf); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, __be32 net_seq) { struct audit_buffer *audit_buf; u32 spi; audit_buf = xfrm_audit_start("SA-notfound"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, family, audit_buf); spi = ntohl(net_spi); audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", spi, spi, ntohl(net_seq)); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, u8 proto) { struct audit_buffer *audit_buf; __be32 net_spi; __be32 net_seq; audit_buf = xfrm_audit_start("SA-icv-failure"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { u32 spi = ntohl(net_spi); audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", spi, spi, ntohl(net_seq)); } audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); |
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#endif /* CONFIG_AUDITSYSCALL */ |