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-rw-r--r--include/net/xfrm.h17
-rw-r--r--net/xfrm/xfrm_policy.c49
2 files changed, 57 insertions, 9 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index c435620dbb3..bed7d43932f 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1045,6 +1045,23 @@ xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
return NULL;
}
+static __inline__
+void xfrm_flowi_addr_get(struct flowi *fl,
+ xfrm_address_t *saddr, xfrm_address_t *daddr,
+ unsigned short family)
+{
+ switch(family) {
+ case AF_INET:
+ memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4));
+ memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4));
+ break;
+ case AF_INET6:
+ ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src);
+ ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst);
+ break;
+ }
+}
+
static __inline__ int
__xfrm4_state_addr_check(struct xfrm_state *x,
xfrm_address_t *daddr, xfrm_address_t *saddr)
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index bae94a8031a..8e588f20c60 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -97,25 +97,52 @@ int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
return 0;
}
+static inline struct dst_entry *__xfrm_dst_lookup(int tos,
+ xfrm_address_t *saddr,
+ xfrm_address_t *daddr,
+ int family)
+{
+ struct xfrm_policy_afinfo *afinfo;
+ struct dst_entry *dst;
+
+ afinfo = xfrm_policy_get_afinfo(family);
+ if (unlikely(afinfo == NULL))
+ return ERR_PTR(-EAFNOSUPPORT);
+
+ dst = afinfo->dst_lookup(tos, saddr, daddr);
+
+ xfrm_policy_put_afinfo(afinfo);
+
+ return dst;
+}
+
static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
+ xfrm_address_t *prev_saddr,
+ xfrm_address_t *prev_daddr,
int family)
{
xfrm_address_t *saddr = &x->props.saddr;
xfrm_address_t *daddr = &x->id.daddr;
- struct xfrm_policy_afinfo *afinfo;
struct dst_entry *dst;
- if (x->type->flags & XFRM_TYPE_LOCAL_COADDR)
+ if (x->type->flags & XFRM_TYPE_LOCAL_COADDR) {
saddr = x->coaddr;
- if (x->type->flags & XFRM_TYPE_REMOTE_COADDR)
+ daddr = prev_daddr;
+ }
+ if (x->type->flags & XFRM_TYPE_REMOTE_COADDR) {
+ saddr = prev_saddr;
daddr = x->coaddr;
+ }
- afinfo = xfrm_policy_get_afinfo(family);
- if (unlikely(afinfo == NULL))
- return ERR_PTR(-EAFNOSUPPORT);
+ dst = __xfrm_dst_lookup(tos, saddr, daddr, family);
+
+ if (!IS_ERR(dst)) {
+ if (prev_saddr != saddr)
+ memcpy(prev_saddr, saddr, sizeof(*prev_saddr));
+ if (prev_daddr != daddr)
+ memcpy(prev_daddr, daddr, sizeof(*prev_daddr));
+ }
- dst = afinfo->dst_lookup(tos, saddr, daddr);
- xfrm_policy_put_afinfo(afinfo);
return dst;
}
@@ -1354,6 +1381,9 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
int trailer_len = 0;
int tos;
int family = policy->selector.family;
+ xfrm_address_t saddr, daddr;
+
+ xfrm_flowi_addr_get(fl, &saddr, &daddr, family);
tos = xfrm_get_tos(fl, family);
err = tos;
@@ -1384,7 +1414,8 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
family = xfrm[i]->props.family;
- dst = xfrm_dst_lookup(xfrm[i], tos, family);
+ dst = xfrm_dst_lookup(xfrm[i], tos, &saddr, &daddr,
+ family);
err = PTR_ERR(dst);
if (IS_ERR(dst))
goto put_states;