From: Phil Sutter <phil@nwl.cc>
Date: Fri, 7 Jun 2019 17:21:19 +0000 (+0200)
Subject: rule: Introduce rule_lookup_by_index()
X-Git-Tag: v0.9.1~35
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4cbbb0a31a45860cdc365e9fba9621c24bbaf8d8;p=thirdparty%2Fnftables.git

rule: Introduce rule_lookup_by_index()

In contrast to rule_lookup(), this function returns a chain's rule at a
given index instead of by handle.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/include/rule.h b/include/rule.h
index bf3f3963..87b440b6 100644
--- a/include/rule.h
+++ b/include/rule.h
@@ -260,6 +260,8 @@ extern struct rule *rule_get(struct rule *rule);
 extern void rule_free(struct rule *rule);
 extern void rule_print(const struct rule *rule, struct output_ctx *octx);
 extern struct rule *rule_lookup(const struct chain *chain, uint64_t handle);
+extern struct rule *rule_lookup_by_index(const struct chain *chain,
+					 uint64_t index);
 
 /**
  * struct set - nftables set
diff --git a/src/rule.c b/src/rule.c
index e570238a..20fe6f37 100644
--- a/src/rule.c
+++ b/src/rule.c
@@ -641,6 +641,17 @@ struct rule *rule_lookup(const struct chain *chain, uint64_t handle)
 	return NULL;
 }
 
+struct rule *rule_lookup_by_index(const struct chain *chain, uint64_t index)
+{
+	struct rule *rule;
+
+	list_for_each_entry(rule, &chain->rules, list) {
+		if (!--index)
+			return rule;
+	}
+	return NULL;
+}
+
 struct scope *scope_init(struct scope *scope, const struct scope *parent)
 {
 	scope->parent = parent;