Add translation for TOS to nftables. TOS is deprecated
ans DSCP is ued in place of it. The first 6 bits of
TOS specify the DSCP value.
Examples:
$ iptables-translate -t mangle -A PREROUTING -p TCP --dport 22 -j TOS --set-tos 0x10
nft add rule ip mangle PREROUTING tcp dport 22 counter ip6 dscp set 0x04
Signed-off-by: Gargi Sharma <gs051095@xxxxxxxxx>
---
Changes in v2:
- Added DSCP conversion.
---
extensions/libxt_TOS.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/extensions/libxt_TOS.c b/extensions/libxt_TOS.c
index cef5876..f284d83 100644
--- a/extensions/libxt_TOS.c
+++ b/extensions/libxt_TOS.c
@@ -183,6 +183,30 @@ static void tos_tg_save(const void *ip, const struct xt_entry_target *target)
printf(" --set-tos 0x%02x/0x%02x", info->tos_value, info->tos_mask);
}
+static int tos_xlate(struct xt_xlate *xl,
+ const struct xt_xlate_tg_params *params)
+{
+ const struct ipt_tos_target_info *info =
+ (struct ipt_tos_target_info *) params->target->data;
+
+ __u8 dscp = (info->tos)>>2;
+ xt_xlate_add(xl, "ip dscp set 0x%02x", dscp);
+
+ return 1;
+}
+
+static int tos_xlate6(struct xt_xlate *xl,
+ const struct xt_xlate_tg_params *params)
+{
+ const struct ipt_tos_target_info *info =
+ (struct ipt_tos_target_info *) params->target->data;
+
+ __u8 dscp = (info->tos)>>2;
+ xt_xlate_add(xl, " ip6 dscp set 0x%02x", dscp);
+
+ return 1;
+}
+
static struct xtables_target tos_tg_reg[] = {
{
.version = XTABLES_VERSION,
@@ -197,6 +221,7 @@ static struct xtables_target tos_tg_reg[] = {
.x6_parse = tos_tg_parse_v0,
.x6_fcheck = tos_tg_check,
.x6_options = tos_tg_opts_v0,
+ .xlate = tos_xlate,
},
{
.version = XTABLES_VERSION,
@@ -211,6 +236,7 @@ static struct xtables_target tos_tg_reg[] = {
.x6_parse = tos_tg_parse,
.x6_fcheck = tos_tg_check,
.x6_options = tos_tg_opts,
+ .xlate = tos_xlate6,
},
};
--
2.7.4
--
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