Patrick McHardy wrote:
> [XFRM]: Fix wildcard as tunnel source
>
> Hashing SAs by source address breaks templates with wildcards as tunnel
> source since the source address used for hashing/lookup is still 0/0.
> Move source address lookup to xfrm_tmpl_resolve_one() so we can use the
> real address in the lookup.
>
>
> static inline int
> +xfrm_addr_any(xfrm_address_t *addr, unsigned short family)
> +{
> + switch (family) {
> + case AF_INET:
> + return addr->a4 == 0;
> + case AF_INET6:
> + return ipv6_addr_any((struct in6_addr*)addr->a6);
D'oh. Fixed patch attached.
[XFRM]: Fix wildcard as tunnel source
Hashing SAs by source address breaks templates with wildcards as tunnel
source since the source address used for hashing/lookup is still 0/0.
Move source address lookup to xfrm_tmpl_resolve_one() so we can use the
real address in the lookup.
Signed-off-by: Patrick McHardy <[EMAIL PROTECTED]>
---
commit f3307c3183e50959247f28c773590b5d7902097f
tree 78ddff768dc25145110767f182408ed6993828c5
parent c2cb1937e1054380c49699188810b9c6e04c8e21
author Patrick McHardy <[EMAIL PROTECTED]> Mon, 18 Sep 2006 11:34:25 +0200
committer Patrick McHardy <[EMAIL PROTECTED]> Mon, 18 Sep 2006 11:34:25 +0200
include/net/xfrm.h | 13 +++++++++++++
net/ipv4/xfrm4_policy.c | 20 ++++++++++++++++++++
net/ipv4/xfrm4_state.c | 15 ---------------
net/ipv6/xfrm6_policy.c | 21 +++++++++++++++++++++
net/ipv6/xfrm6_state.c | 16 ----------------
net/xfrm/xfrm_policy.c | 21 +++++++++++++++++++++
6 files changed, 75 insertions(+), 31 deletions(-)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index bf8e2df..c6fac69 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -223,6 +223,7 @@ struct xfrm_policy_afinfo {
struct dst_ops *dst_ops;
void (*garbage_collect)(void);
int (*dst_lookup)(struct xfrm_dst **dst, struct
flowi *fl);
+ int (*get_saddr)(xfrm_address_t *saddr,
xfrm_address_t *daddr);
struct dst_entry *(*find_bundle)(struct flowi *fl, struct
xfrm_policy *policy);
int (*bundle_create)(struct xfrm_policy *policy,
struct xfrm_state **xfrm,
@@ -632,6 +633,18 @@ #endif
}
static inline int
+xfrm_addr_any(xfrm_address_t *addr, unsigned short family)
+{
+ switch (family) {
+ case AF_INET:
+ return addr->a4 == 0;
+ case AF_INET6:
+ return ipv6_addr_any((struct in6_addr *)&addr->a6);
+ }
+ return 0;
+}
+
+static inline int
__xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
{
return (tmpl->saddr.a4 &&
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 4795985..eabcd27 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -21,6 +21,25 @@ static int xfrm4_dst_lookup(struct xfrm_
return __ip_route_output_key((struct rtable**)dst, fl);
}
+static int xfrm4_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
+{
+ struct rtable *rt;
+ struct flowi fl_tunnel = {
+ .nl_u = {
+ .ip4_u = {
+ .daddr = daddr->a4,
+ },
+ },
+ };
+
+ if (!xfrm4_dst_lookup((struct xfrm_dst **)&rt, &fl_tunnel)) {
+ saddr->a4 = rt->rt_src;
+ dst_release(&rt->u.dst);
+ return 0;
+ }
+ return -EHOSTUNREACH;
+}
+
static struct dst_entry *
__xfrm4_find_bundle(struct flowi *fl, struct xfrm_policy *policy)
{
@@ -298,6 +317,7 @@ static struct xfrm_policy_afinfo xfrm4_p
.family = AF_INET,
.dst_ops = &xfrm4_dst_ops,
.dst_lookup = xfrm4_dst_lookup,
+ .get_saddr = xfrm4_get_saddr,
.find_bundle = __xfrm4_find_bundle,
.bundle_create = __xfrm4_bundle_create,
.decode_session = _decode_session4,
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index 6a2a4ab..fe20344 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -42,21 +42,6 @@ __xfrm4_init_tempsel(struct xfrm_state *
x->props.saddr = tmpl->saddr;
if (x->props.saddr.a4 == 0)
x->props.saddr.a4 = saddr->a4;
- if (tmpl->mode == XFRM_MODE_TUNNEL && x->props.saddr.a4 == 0) {
- struct rtable *rt;
- struct flowi fl_tunnel = {
- .nl_u = {
- .ip4_u = {
- .daddr = x->id.daddr.a4,
- }
- }
- };
- if (!xfrm_dst_lookup((struct xfrm_dst **)&rt,
- &fl_tunnel, AF_INET)) {
- x->props.saddr.a4 = rt->rt_src;
- dst_release(&rt->u.dst);
- }
- }
x->props.mode = tmpl->mode;
x->props.reqid = tmpl->reqid;
x->props.family = AF_INET;
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 9391c4c..6a252e2 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -34,6 +34,26 @@ static int xfrm6_dst_lookup(struct xfrm_
return err;
}
+static int xfrm6_get_saddr(xfrm_address_t *saddr, xfrm_address_t *daddr)
+{
+ struct rt6_info *rt;
+ struct flowi fl_tunnel = {
+ .nl_u = {
+ .ip6_u = {
+ .daddr = *(struct in6_addr *)&daddr->a6,
+ },
+ },
+ };
+
+ if (!xfrm6_dst_lookup((struct xfrm_dst **)&rt, &fl_tunnel)) {
+ ipv6_get_saddr(&rt->u.dst, (struct in6_addr *)&daddr->a6,
+ (struct in6_addr *)&saddr->a6);
+ dst_release(&rt->u.dst);
+ return 0;
+ }
+ return -EHOSTUNREACH;
+}
+
static struct dst_entry *
__xfrm6_find_bundle(struct flowi *fl, struct xfrm_policy *policy)
{
@@ -362,6 +382,7 @@ static struct xfrm_policy_afinfo xfrm6_p
.family = AF_INET6,
.dst_ops = &xfrm6_dst_ops,
.dst_lookup = xfrm6_dst_lookup,
+ .get_saddr = xfrm6_get_saddr,
.find_bundle = __xfrm6_find_bundle,
.bundle_create = __xfrm6_bundle_create,
.decode_session = _decode_session6,
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index d88cd92..711bfaf 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -42,22 +42,6 @@ __xfrm6_init_tempsel(struct xfrm_state *
memcpy(&x->props.saddr, &tmpl->saddr, sizeof(x->props.saddr));
if (ipv6_addr_any((struct in6_addr*)&x->props.saddr))
memcpy(&x->props.saddr, saddr, sizeof(x->props.saddr));
- if (tmpl->mode == XFRM_MODE_TUNNEL && ipv6_addr_any((struct
in6_addr*)&x->props.saddr)) {
- struct rt6_info *rt;
- struct flowi fl_tunnel = {
- .nl_u = {
- .ip6_u = {
- .daddr = *(struct in6_addr *)daddr,
- }
- }
- };
- if (!xfrm_dst_lookup((struct xfrm_dst **)&rt,
- &fl_tunnel, AF_INET6)) {
- ipv6_get_saddr(&rt->u.dst, (struct in6_addr *)daddr,
- (struct in6_addr *)&x->props.saddr);
- dst_release(&rt->u.dst);
- }
- }
x->props.mode = tmpl->mode;
x->props.reqid = tmpl->reqid;
x->props.family = AF_INET6;
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 537854f..b6e2e79 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1107,6 +1107,20 @@ int __xfrm_sk_clone_policy(struct sock *
return 0;
}
+static int
+xfrm_get_saddr(xfrm_address_t *local, xfrm_address_t *remote,
+ unsigned short family)
+{
+ int err;
+ struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family);
+
+ if (unlikely(afinfo == NULL))
+ return -EINVAL;
+ err = afinfo->get_saddr(local, remote);
+ xfrm_policy_put_afinfo(afinfo);
+ return err;
+}
+
/* Resolve list of templates for the flow, given policy. */
static int
@@ -1118,6 +1132,7 @@ xfrm_tmpl_resolve_one(struct xfrm_policy
int i, error;
xfrm_address_t *daddr = xfrm_flowi_daddr(fl, family);
xfrm_address_t *saddr = xfrm_flowi_saddr(fl, family);
+ xfrm_address_t tmp;
for (nx=0, i = 0; i < policy->xfrm_nr; i++) {
struct xfrm_state *x;
@@ -1128,6 +1143,12 @@ xfrm_tmpl_resolve_one(struct xfrm_policy
if (tmpl->mode == XFRM_MODE_TUNNEL) {
remote = &tmpl->id.daddr;
local = &tmpl->saddr;
+ if (xfrm_addr_any(local, family)) {
+ error = xfrm_get_saddr(&tmp, remote, family);
+ if (error)
+ goto fail;
+ local = &tmp;
+ }
}
x = xfrm_state_find(remote, local, fl, tmpl, policy, &error,
family);
