#include <linux/ipsec.h>
#include <linux/module.h>
#include <linux/cache.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
#include "xfrm_hash.h"
static unsigned int xfrm_state_num;
static unsigned int xfrm_state_genid;
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
+
+#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 */
+
static inline unsigned int xfrm_dst_hash(xfrm_address_t *daddr,
xfrm_address_t *saddr,
u32 reqid,
int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
+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)
+ __releases(xfrm_state_afinfo_lock)
+{
+ write_unlock_bh(&xfrm_state_afinfo_lock);
+}
+
+int xfrm_register_type(struct xfrm_type *type, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
+ struct xfrm_type **typemap;
+ 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);
+
+int xfrm_unregister_type(struct xfrm_type *type, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
+ struct xfrm_type **typemap;
+ 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);
+
+static struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
+{
+ struct xfrm_state_afinfo *afinfo;
+ struct xfrm_type **typemap;
+ struct xfrm_type *type;
+ 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;
+}
+
+static void xfrm_put_type(struct xfrm_type *type)
+{
+ 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;
+ if (modemap[mode->encap])
+ goto out;
+
+ err = -ENOENT;
+ if (!try_module_get(afinfo->owner))
+ goto out;
+
+ mode->afinfo = afinfo;
+ modemap[mode->encap] = mode;
+ err = 0;
+
+out:
+ 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;
+ module_put(mode->afinfo->owner);
+ 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);
+}
+
static void xfrm_state_gc_destroy(struct xfrm_state *x)
{
del_timer_sync(&x->timer);
kfree(x->calg);
kfree(x->encap);
kfree(x->coaddr);
- if (x->mode)
- xfrm_put_mode(x->mode);
+ if (x->inner_mode)
+ xfrm_put_mode(x->inner_mode);
+ if (x->outer_mode)
+ xfrm_put_mode(x->outer_mode);
if (x->type) {
x->type->destructor(x);
xfrm_put_type(x->type);
INIT_HLIST_NODE(&x->bydst);
INIT_HLIST_NODE(&x->bysrc);
INIT_HLIST_NODE(&x->byspi);
- init_timer(&x->timer);
- x->timer.function = xfrm_timer_handler;
- x->timer.data = (unsigned long)x;
- init_timer(&x->rtimer);
- x->rtimer.function = xfrm_replay_timer_handler;
- x->rtimer.data = (unsigned long)x;
+ setup_timer(&x->timer, xfrm_timer_handler, (unsigned long)x);
+ setup_timer(&x->rtimer, xfrm_replay_timer_handler,
+ (unsigned long)x);
x->curlft.add_time = get_seconds();
x->lft.soft_byte_limit = XFRM_INF;
x->lft.soft_packet_limit = XFRM_INF;
* The xfrm_state_alloc call gives a reference, and that
* is what we are dropping here.
*/
- __xfrm_state_put(x);
+ xfrm_state_put(x);
err = 0;
}
struct xfrm_policy *pol, int *err,
unsigned short family)
{
- unsigned int h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family);
+ unsigned int h;
struct hlist_node *entry;
struct xfrm_state *x, *x0;
int acquire_in_progress = 0;
struct xfrm_state *best = NULL;
spin_lock_bh(&xfrm_state_lock);
+ h = xfrm_dst_hash(daddr, saddr, tmpl->reqid, family);
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
if (x->props.family == family &&
x->props.reqid == tmpl->reqid &&
xfrm_stateonly_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
unsigned short family, u8 mode, u8 proto, u32 reqid)
{
- unsigned int h = xfrm_dst_hash(daddr, saddr, reqid, family);
+ unsigned int h;
struct xfrm_state *rx = NULL, *x = NULL;
struct hlist_node *entry;
spin_lock(&xfrm_state_lock);
+ h = xfrm_dst_hash(daddr, saddr, reqid, family);
hlist_for_each_entry(x, entry, xfrm_state_bydst+h, bydst) {
if (x->props.family == family &&
x->props.reqid == reqid &&
spin_unlock(&x->lock);
}
-int xfrm_replay_check(struct xfrm_state *x, __be32 net_seq)
+int xfrm_replay_check(struct xfrm_state *x,
+ struct sk_buff *skb, __be32 net_seq)
{
u32 diff;
u32 seq = ntohl(net_seq);
if (unlikely(seq == 0))
- return -EINVAL;
+ goto err;
if (likely(seq > x->replay.seq))
return 0;
if (diff >= min_t(unsigned int, x->props.replay_window,
sizeof(x->replay.bitmap) * 8)) {
x->stats.replay_window++;
- return -EINVAL;
+ goto err;
}
if (x->replay.bitmap & (1U << diff)) {
x->stats.replay++;
- return -EINVAL;
+ goto err;
}
return 0;
+
+err:
+ xfrm_audit_state_replay(x, skb, net_seq);
+ return -EINVAL;
}
EXPORT_SYMBOL(xfrm_replay_check);
}
EXPORT_SYMBOL(xfrm_replay_advance);
-static struct list_head xfrm_km_list = LIST_HEAD_INIT(xfrm_km_list);
+static LIST_HEAD(xfrm_km_list);
static DEFINE_RWLOCK(xfrm_km_lock);
void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
}
EXPORT_SYMBOL(km_policy_expired);
+#ifdef CONFIG_XFRM_MIGRATE
int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
struct xfrm_migrate *m, int num_migrate)
{
return err;
}
EXPORT_SYMBOL(km_migrate);
+#endif
int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
{
}
EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
-struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
{
struct xfrm_state_afinfo *afinfo;
if (unlikely(family >= NPROTO))
return afinfo;
}
-void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
+ __releases(xfrm_state_afinfo_lock)
{
read_unlock(&xfrm_state_afinfo_lock);
}
-EXPORT_SYMBOL(xfrm_state_get_afinfo);
-EXPORT_SYMBOL(xfrm_state_put_afinfo);
-
/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
void xfrm_state_delete_tunnel(struct xfrm_state *x)
{
goto error;
err = -EPROTONOSUPPORT;
+ x->inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
+ if (x->inner_mode == NULL)
+ goto error;
+
+ if (!(x->inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
+ family != x->sel.family)
+ goto error;
+
x->type = xfrm_get_type(x->id.proto, family);
if (x->type == NULL)
goto error;
if (err)
goto error;
- x->mode = xfrm_get_mode(x->props.mode, family);
- if (x->mode == NULL)
+ x->outer_mode = xfrm_get_mode(x->props.mode, family);
+ if (x->outer_mode == NULL)
goto error;
x->km.state = XFRM_STATE_VALID;
}
#ifdef CONFIG_AUDITSYSCALL
-static inline void xfrm_audit_common_stateinfo(struct xfrm_state *x,
- struct audit_buffer *audit_buf)
+static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
+ struct audit_buffer *audit_buf)
{
- if (x->security)
+ struct xfrm_sec_ctx *ctx = x->security;
+ u32 spi = ntohl(x->id.spi);
+
+ if (ctx)
audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
- x->security->ctx_alg, x->security->ctx_doi,
- x->security->ctx_str);
+ ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);
switch(x->props.family) {
case AF_INET:
- audit_log_format(audit_buf, " src=%u.%u.%u.%u dst=%u.%u.%u.%u",
+ audit_log_format(audit_buf,
+ " src=" NIPQUAD_FMT " dst=" NIPQUAD_FMT,
NIPQUAD(x->props.saddr.a4),
NIPQUAD(x->id.daddr.a4));
break;
case AF_INET6:
- {
- struct in6_addr saddr6, daddr6;
-
- memcpy(&saddr6, x->props.saddr.a6,
- sizeof(struct in6_addr));
- memcpy(&daddr6, x->id.daddr.a6,
- sizeof(struct in6_addr));
- audit_log_format(audit_buf,
- " src=" NIP6_FMT " dst=" NIP6_FMT,
- NIP6(saddr6), NIP6(daddr6));
- }
+ 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));
+ break;
+ }
+
+ audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
+}
+
+static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
+ struct audit_buffer *audit_buf)
+{
+ 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
+ " flowlbl=0x%x%x%x",
+ NIP6(iph6->saddr),
+ NIP6(iph6->daddr),
+ iph6->flow_lbl[0] & 0x0f,
+ iph6->flow_lbl[1],
+ iph6->flow_lbl[2]);
break;
}
}
-void
-xfrm_audit_state_add(struct xfrm_state *x, int result, u32 auid, u32 sid)
+void xfrm_audit_state_add(struct xfrm_state *x, int result,
+ u32 auid, u32 secid)
{
struct audit_buffer *audit_buf;
- extern int audit_enabled;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(sid, auid);
+ audit_buf = xfrm_audit_start("SAD-add");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SAD-add res=%u",result);
- xfrm_audit_common_stateinfo(x, audit_buf);
- audit_log_format(audit_buf, " spi=%lu(0x%lx)",
- (unsigned long)x->id.spi, (unsigned long)x->id.spi);
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ xfrm_audit_helper_sainfo(x, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_add);
-void
-xfrm_audit_state_delete(struct xfrm_state *x, int result, u32 auid, u32 sid)
+void xfrm_audit_state_delete(struct xfrm_state *x, int result,
+ u32 auid, u32 secid)
{
struct audit_buffer *audit_buf;
- extern int audit_enabled;
- if (audit_enabled == 0)
- return;
- audit_buf = xfrm_audit_start(sid, auid);
+ audit_buf = xfrm_audit_start("SAD-delete");
if (audit_buf == NULL)
return;
- audit_log_format(audit_buf, " op=SAD-delete res=%u",result);
- xfrm_audit_common_stateinfo(x, audit_buf);
- audit_log_format(audit_buf, " spi=%lu(0x%lx)",
- (unsigned long)x->id.spi, (unsigned long)x->id.spi);
+ xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+ xfrm_audit_helper_sainfo(x, audit_buf);
+ audit_log_format(audit_buf, " res=%u", result);
audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);
+
+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);
#endif /* CONFIG_AUDITSYSCALL */
projects / linux-2.6-omap-h63xx.git / blobdiff