xfrm: export verify_userspi_info for pkfey and netlink interface

In order to check against valid IPcomp spi range, export verify_userspi_info
for both pfkey and netlink interface.

Signed-off-by: Fan Du <fan.du@windriver.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

2 files changed, 25 insertions, 24 deletions

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index e845066547c4..a62c25ea3631 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1489,6 +1489,30 @@ u32 xfrm_get_acqseq(void)
 }
 EXPORT_SYMBOL(xfrm_get_acqseq);
 
+int verify_spi_info(u8 proto, u32 min, u32 max)
+{
+        switch (proto) {
+        case IPPROTO_AH:
+        case IPPROTO_ESP:
+                break;
+
+        case IPPROTO_COMP:
+                /* IPCOMP spi is 16-bits. */
+                if (max >= 0x10000)
+                        return -EINVAL;
+                break;
+
+        default:
+                return -EINVAL;
+        }
+
+        if (min > max)
+                return -EINVAL;
+
+        return 0;
+}
+EXPORT_SYMBOL(verify_spi_info);
+
 int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
 {
         struct net *net = xs_net(x);
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 4027c4266a87..97681a390402 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1079,29 +1079,6 @@ out_noput:
         return err;
 }
 
-static int verify_userspi_info(struct xfrm_userspi_info *p)
-{
-        switch (p->info.id.proto) {
-        case IPPROTO_AH:
-        case IPPROTO_ESP:
-                break;
-
-        case IPPROTO_COMP:
-                /* IPCOMP spi is 16-bits. */
-                if (p->max >= 0x10000)
-                        return -EINVAL;
-                break;
-
-        default:
-                return -EINVAL;
-        }
-
-        if (p->min > p->max)
-                return -EINVAL;
-
-        return 0;
-}
-
 static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
                 struct nlattr **attrs)
 {
@@ -1116,7 +1093,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
         struct xfrm_mark m;
 
         p = nlmsg_data(nlh);
-        err = verify_userspi_info(p);
+        err = verify_spi_info(p->info.id.proto, p->min, p->max);
         if (err)
                 goto out_noput;