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authorFlorian Westphal <fw@strlen.de>2018-01-27 11:09:46 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2018-01-31 14:49:02 +0100
commit459b6932412334feafd63bb9dfcdf16d8acd8d61 (patch)
tree145f624e5650c377ed04e95a484f30fe3a60c3a6
parent255e55b7b3efc52f42c9c8a7bac08edb00c46d8f (diff)
policy: add nft translation for simple policy none/strict use case
Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r--extensions/libxt_policy.c27
-rw-r--r--extensions/libxt_policy.txlate5
2 files changed, 32 insertions, 0 deletions
diff --git a/extensions/libxt_policy.c b/extensions/libxt_policy.c
index 0a64a80c..f9a4819c 100644
--- a/extensions/libxt_policy.c
+++ b/extensions/libxt_policy.c
@@ -376,6 +376,31 @@ static void policy6_save(const void *ip, const struct xt_entry_match *match)
}
}
+static int policy_xlate(struct xt_xlate *xl,
+ const struct xt_xlate_mt_params *params)
+{
+ static const unsigned int allowed = XT_POLICY_MATCH_STRICT |
+ XT_POLICY_MATCH_NONE |
+ XT_POLICY_MATCH_IN;
+ static const struct xt_policy_elem empty;
+ const struct xt_policy_info *info = (const void *)params->match->data;
+
+ if ((info->flags & ~allowed) || info->len > 1)
+ return 0;
+
+ if (memcmp(&info->pol[0], &empty, sizeof(empty)))
+ return 0;
+
+ xt_xlate_add(xl, "meta secpath ");
+
+ if (info->flags & XT_POLICY_MATCH_NONE)
+ xt_xlate_add(xl, "missing");
+ else
+ xt_xlate_add(xl, "exists");
+
+ return 1;
+}
+
static struct xtables_match policy_mt_reg[] = {
{
.name = "policy",
@@ -389,6 +414,7 @@ static struct xtables_match policy_mt_reg[] = {
.print = policy4_print,
.save = policy4_save,
.x6_options = policy_opts,
+ .xlate = policy_xlate,
},
{
.name = "policy",
@@ -402,6 +428,7 @@ static struct xtables_match policy_mt_reg[] = {
.print = policy6_print,
.save = policy6_save,
.x6_options = policy_opts,
+ .xlate = policy_xlate,
},
};
diff --git a/extensions/libxt_policy.txlate b/extensions/libxt_policy.txlate
new file mode 100644
index 00000000..66788a76
--- /dev/null
+++ b/extensions/libxt_policy.txlate
@@ -0,0 +1,5 @@
+iptables-translate -A INPUT -m policy --pol ipsec --dir in
+nft add rule ip filter INPUT meta secpath exists counter
+
+iptables-translate -A INPUT -m policy --pol none --dir in
+nft add rule ip filter INPUT meta secpath missing counter