src: Implement rule comparison

This patch implements the function:

	bool nftnl_rule_cmp(const struct nftnl_rule *r1,
			    const struct nftnl_rule *r2)

for rule comparison.

Expressions within rules need to be compared, so also has been created the
function:

	bool nftnl_expr_cmp(const struct nftnl_expr *e1,
			    const struct nftnl_expr *e2);

Also includes all expression comparators.

Signed-off-by: Carlos Falgueras García <carlosfg@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/libnftnl/rule.h b/include/libnftnl/rule.h
index e3bd6b8..adeedf2 100644
--- a/include/libnftnl/rule.h
+++ b/include/libnftnl/rule.h
@@ -50,6 +50,8 @@ uint64_t nftnl_rule_get_u64(const struct nftnl_rule *r, uint16_t attr);
 
 void nftnl_rule_add_expr(struct nftnl_rule *r, struct nftnl_expr *expr);
 
+bool nftnl_rule_cmp(const struct nftnl_rule *r1, const struct nftnl_rule *r2);
+
 struct nlmsghdr;
 
 void nftnl_rule_nlmsg_build_payload(struct nlmsghdr *nlh, struct nftnl_rule *t);