Re: [PATCH net-next 1/2] net: netfilter: export xt_policy match_policy_in() as xt_policy_match_policy_in()

On Fri, Jan 12, 2018 at 03:56:21PM +0200, Eyal Birger wrote:

On Fri, Jan 12, 2018 at 3:41 PM, Pablo Neira Ayuso [off-list ref] wrote:

quoted

On Fri, Jan 12, 2018 at 02:57:24PM +0200, Eyal Birger wrote:

quoted

@@ -51,9 +52,9 @@ match_xfrm_state(const struct xfrm_state *x, const struct xt_policy_elem *e,
             MATCH(reqid, x->props.reqid);
 }

-static int
-match_policy_in(const struct sk_buff *skb, const struct xt_policy_info *info,
-             unsigned short family)
+int xt_policy_match_policy_in(const struct sk_buff *skb,
+                           const struct xt_policy_info *info,
+                           unsigned short family)
 {
      const struct xt_policy_elem *e;
      const struct sec_path *sp = skb->sp;

@@ -80,10 +81,11 @@ match_policy_in(const struct sk_buff *skb, const struct xt_policy_info *info,

      return strict ? 1 : 0;
 }
+EXPORT_SYMBOL_GPL(xt_policy_match_policy_in);

If you just want to call xt_policy_match from tc, then you could use
tc ipt infrastructure instead.

Thanks for the suggestion -
Are you referring to act_ipt? it looks like it allows calling targets;
I couldn't find a classifier calling a netfilter matcher.

Then, I'd suggest you extend that infrastructure to alllow to call
matches, so we reduce the number of interdepencies between different
subsystems.