xfrm: Accept XFRM_STATE_AF_UNSPEC SAs on IPv4/IPv6 only hosts
Installing SAs using the XFRM_STATE_AF_UNSPEC fails on hosts with
support for one address family only. This patch accepts such SAs, even
if the processing of not supported packets will fail.
Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 2fd57f8..e25ff62 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -2022,8 +2022,9 @@
x->inner_mode = inner_mode;
} else {
struct xfrm_mode *inner_mode_iaf;
+ int iafamily = AF_INET;
- inner_mode = xfrm_get_mode(x->props.mode, AF_INET);
+ inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
if (inner_mode == NULL)
goto error;
@@ -2031,22 +2032,17 @@
xfrm_put_mode(inner_mode);
goto error;
}
+ x->inner_mode = inner_mode;
- inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6);
- if (inner_mode_iaf == NULL)
- goto error;
+ if (x->props.family == AF_INET)
+ iafamily = AF_INET6;
- 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;
+ inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
+ if (inner_mode_iaf) {
+ if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
+ x->inner_mode_iaf = inner_mode_iaf;
+ else
+ xfrm_put_mode(inner_mode_iaf);
}
}