[iptables PATCH v2 11/12] nft: Support parsing lookup expression

[Phil Sutter]

Add required glue code to support family specific lookup expression
parsers implemented as family_ops callback.

Signed-off-by: Phil Sutter <p...@nwl.cc>
---
 iptables/nft-shared.c | 9 +++++++++
 iptables/nft-shared.h | 2 ++
 iptables/nft.c        | 5 ++++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/iptables/nft-shared.c b/iptables/nft-shared.c
index 19630c1e2990c..78e422781723f 100644
--- a/iptables/nft-shared.c
+++ b/iptables/nft-shared.c
@@ -588,6 +588,13 @@ static void nft_parse_limit(struct nft_xt_ctx *ctx, struct 
nftnl_expr *e)
                ctx->h->ops->parse_match(match, ctx->cs);
 }
 
+static void nft_parse_lookup(struct nft_xt_ctx *ctx, struct nft_handle *h,
+                            struct nftnl_expr *e)
+{
+       if (ctx->h->ops->parse_lookup)
+               ctx->h->ops->parse_lookup(ctx, e, NULL);
+}
+
 void nft_rule_to_iptables_command_state(struct nft_handle *h,
                                        const struct nftnl_rule *r,
                                        struct iptables_command_state *cs)
@@ -628,6 +635,8 @@ void nft_rule_to_iptables_command_state(struct nft_handle 
*h,
                        nft_parse_target(&ctx, expr);
                else if (strcmp(name, "limit") == 0)
                        nft_parse_limit(&ctx, expr);
+               else if (strcmp(name, "lookup") == 0)
+                       nft_parse_lookup(&ctx, h, expr);
 
                expr = nftnl_expr_iter_next(iter);
        }
diff --git a/iptables/nft-shared.h b/iptables/nft-shared.h
index 55e7f3c7c1da4..b7539365acf89 100644
--- a/iptables/nft-shared.h
+++ b/iptables/nft-shared.h
@@ -86,6 +86,8 @@ struct nft_family_ops {
                              void *data);
        void (*parse_cmp)(struct nft_xt_ctx *ctx, struct nftnl_expr *e,
                          void *data);
+       void (*parse_lookup)(struct nft_xt_ctx *ctx, struct nftnl_expr *e,
+                            void *data);
        void (*parse_immediate)(const char *jumpto, bool nft_goto, void *data);
 
        void (*print_table_header)(const char *tablename);
diff --git a/iptables/nft.c b/iptables/nft.c
index 7cab4a236aaa7..71171b106febe 100644
--- a/iptables/nft.c
+++ b/iptables/nft.c
@@ -1085,6 +1085,8 @@ int add_match(struct nft_handle *h,
 
        if (!strcmp(m->u.user.name, "limit"))
                return add_nft_limit(r, m);
+       else if (!strcmp(m->u.user.name, "among"))
+               return add_nft_among(h, r, m);
 
        expr = nftnl_expr_alloc("match");
        if (expr == NULL)
@@ -3697,7 +3699,8 @@ static const char *supported_exprs[] = {
        "cmp",
        "bitwise",
        "counter",
-       "immediate"
+       "immediate",
+       "lookup"
 };
 
 
-- 
2.23.0