Add translation for connmark to nftables.
Examples:
$ sudo iptables-translate -A INPUT -m connmark --mark 2 -j ACCEPT
nft add rule ip filter INPUT ct mark 0x2 counter accept
$ sudo iptables-translate -A INPUT -m connmark ! --mark 2 -j ACCEPT
nft add rule ip filter INPUT ct mark != 0x2 counter accept
$ sudo iptables-translate -A INPUT -m connmark --mark 10/10 -j ACCEPT
nft add rule ip filter INPUT ct mark and 0xa == 0xa counter accept
$ sudo iptables-translate -A INPUT -m connmark ! --mark 10/10 -j ACCEPT
nft add rule ip filter INPUT ct mark and 0xa != 0xa counter accept
$ sudo iptables-translate -t mangle -A PREROUTING -p tcp --dport 40 -m
connmark --mark 0x40
nft add rule ip mangle PREROUTING tcp dport 40 ct mark 0x40 counter
Signed-off-by : Shivani Bhardwaj <shivanib134@xxxxxxxxx>
---
Changes in v3:
Replace the string added in v2 with enum to make code look
better
extensions/libxt_connmark.c | 47 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 46 insertions(+), 1 deletion(-)
diff --git a/extensions/libxt_connmark.c b/extensions/libxt_connmark.c
index 95477de..087d4bf 100644
--- a/extensions/libxt_connmark.c
+++ b/extensions/libxt_connmark.c
@@ -89,7 +89,8 @@ connmark_print(const void *ip, const struct xt_entry_match *match, int numeric)
}
static void
-connmark_mt_print(const void *ip, const struct xt_entry_match *match, int numeric)
+connmark_mt_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
{
const struct xt_connmark_mtinfo1 *info = (const void *)match->data;
@@ -122,6 +123,48 @@ connmark_mt_save(const void *ip, const struct xt_entry_match *match)
print_mark(info->mark, info->mask);
}
+static void print_mark_xlate(unsigned int mark, unsigned int mask,
+ struct xt_buf *buf, uint32_t op)
+{
+ if (mask != 0xffffffffU)
+ xt_buf_add(buf, " and 0x%x %s 0x%x ", mark,
+ op == XT_OP_EQ ? "==" : "!=", mask);
+ else
+ xt_buf_add(buf, " %s0x%x ",
+ op == XT_OP_EQ ? "" : "!= ", mark);
+}
+
+static int connmark_xlate(const struct xt_entry_match *match,
+ struct xt_buf *buf, int numeric)
+{
+ const struct xt_connmark_info *info = (const void *)match->data;
+ enum xt_op op = XT_OP_EQ;
+
+ if (info->invert)
+ op = XT_OP_NEQ;
+
+ xt_buf_add(buf, "ct mark");
+ print_mark_xlate(info->mark, info->mask, buf, op);
+
+ return 1;
+}
+
+static int
+connmark_mt_xlate(const struct xt_entry_match *match,
+ struct xt_buf *buf, int numeric)
+{
+ const struct xt_connmark_mtinfo1 *info = (const void *)match->data;
+ enum xt_op op = XT_OP_EQ;
+
+ if (info->invert)
+ op = XT_OP_NEQ;
+
+ xt_buf_add(buf, "ct mark");
+ print_mark_xlate(info->mark, info->mask, buf, op);
+
+ return 1;
+}
+
static struct xtables_match connmark_mt_reg[] = {
{
.family = NFPROTO_UNSPEC,
@@ -135,6 +178,7 @@ static struct xtables_match connmark_mt_reg[] = {
.save = connmark_save,
.x6_parse = connmark_parse,
.x6_options = connmark_mt_opts,
+ .xlate = connmark_xlate,
},
{
.version = XTABLES_VERSION,
@@ -148,6 +192,7 @@ static struct xtables_match connmark_mt_reg[] = {
.save = connmark_mt_save,
.x6_parse = connmark_mt_parse,
.x6_options = connmark_mt_opts,
+ .xlate = connmark_mt_xlate,
},
};
--
1.9.1
--
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