[PATCH iproute2] tc: adjust xtables_match and xtables_target to changes in recent iptables

[Eyal Birger]

iptables commit 933400b37d09 ("nft: xtables: add the infrastructure to 
translate from iptables to nft")
added an additional member to struct xtables_match and struct xtables_target.

This change is available for libxtables12 and up.
Add these members conditionally to support both newer and older versions.

Fixes: dd29621578d2 ("tc: add em_ipt ematch for calling xtables matches from tc 
matching context")
Signed-off-by: Eyal Birger <eyal.bir...@gmail.com>
---
 include/xtables.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/include/xtables.h b/include/xtables.h
index b48c3166..583619f4 100644
--- a/include/xtables.h
+++ b/include/xtables.h
@@ -206,6 +206,24 @@ enum xtables_ext_flags {
        XTABLES_EXT_ALIAS = 1 << 0,
 };
 
+#if XTABLES_VERSION_CODE >= 12
+struct xt_xlate;
+
+struct xt_xlate_mt_params {
+       const void                      *ip;
+       const struct xt_entry_match     *match;
+       int                             numeric;
+       bool                            escape_quotes;
+};
+
+struct xt_xlate_tg_params {
+       const void                      *ip;
+       const struct xt_entry_target    *target;
+       int                             numeric;
+       bool                            escape_quotes;
+};
+#endif
+
 /* Include file for additions: new matches and targets. */
 struct xtables_match
 {
@@ -270,6 +288,12 @@ struct xtables_match
        void (*x6_fcheck)(struct xt_fcheck_call *);
        const struct xt_option_entry *x6_options;
 
+#if XTABLES_VERSION_CODE >= 12
+       /* Translate iptables to nft */
+       int (*xlate)(struct xt_xlate *xl,
+                    const struct xt_xlate_mt_params *params);
+#endif
+
        /* Size of per-extension instance extra "global" scratch space */
        size_t udata_size;
 
@@ -347,6 +371,12 @@ struct xtables_target
        void (*x6_fcheck)(struct xt_fcheck_call *);
        const struct xt_option_entry *x6_options;
 
+#if XTABLES_VERSION_CODE >= 12
+       /* Translate iptables to nft */
+       int (*xlate)(struct xt_xlate *xl,
+                    const struct xt_xlate_tg_params *params);
+#endif
+
        size_t udata_size;
 
        /* Ignore these men behind the curtain: */
-- 
2.17.1