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authorCarlos Falgueras García <carlosfg@riseup.net>2016-08-17 16:07:09 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2016-08-17 16:08:06 +0200
commite35693fd13de771e1e047ffa4f799f72f1446e8d (patch)
tree4727255558de280341f39a3514c996ab92654cc4 /src/expr/meta.c
parent48a71a20420e307d0a1d8a89ac9fc7b46ec5a1ca (diff)
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>
Diffstat (limited to 'src/expr/meta.c')
-rw-r--r--src/expr/meta.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/expr/meta.c b/src/expr/meta.c
index a478a89..6abf6c4 100644
--- a/src/expr/meta.c
+++ b/src/expr/meta.c
@@ -296,10 +296,28 @@ nftnl_expr_meta_snprintf(char *buf, size_t len, uint32_t type,
return -1;
}
+static bool nftnl_expr_meta_cmp(const struct nftnl_expr *e1,
+ const struct nftnl_expr *e2)
+{
+ struct nftnl_expr_meta *m1 = nftnl_expr_data(e1);
+ struct nftnl_expr_meta *m2 = nftnl_expr_data(e2);
+ bool eq = true;
+
+ if (e1->flags & (1 << NFTNL_EXPR_META_KEY))
+ eq &= (m1->key == m2->key);
+ if (e1->flags & (1 << NFTNL_EXPR_META_DREG))
+ eq &= (m1->dreg == m2->dreg);
+ if (e1->flags & (1 << NFTNL_EXPR_META_SREG))
+ eq &= (m1->sreg == m2->sreg);
+
+ return eq;
+}
+
struct expr_ops expr_ops_meta = {
.name = "meta",
.alloc_len = sizeof(struct nftnl_expr_meta),
.max_attr = NFTA_META_MAX,
+ .cmp = nftnl_expr_meta_cmp,
.set = nftnl_expr_meta_set,
.get = nftnl_expr_meta_get,
.parse = nftnl_expr_meta_parse,