Since path mtu support was added, we can now add
iptables-compat translation for TCPMSS extension.
Signed-off-by: Aastha Gupta <aastha.gupta4104@xxxxxxxxx>
---
changes in v2:
- translate other options in TCPMSS target extension
- fixed code styling issues
extensions/libxt_TCPMSS.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/extensions/libxt_TCPMSS.c b/extensions/libxt_TCPMSS.c
index 4b71e44..0d9b200 100644
--- a/extensions/libxt_TCPMSS.c
+++ b/extensions/libxt_TCPMSS.c
@@ -91,6 +91,19 @@ static void TCPMSS_save(const void *ip, const struct xt_entry_target *target)
printf(" --set-mss %u", mssinfo->mss);
}
+static int TCPMSS_xlate(struct xt_xlate *xl,
+ const struct xt_xlate_tg_params *params)
+{
+ const struct xt_tcpmss_info *mssinfo =
+ (const struct xt_tcpmss_info *)params->target->data;
+ if (mssinfo->mss == XT_TCPMSS_CLAMP_PMTU)
+ xt_xlate_add(xl, "tcp option maxseg size set rt mtu");
+ else
+ xt_xlate_add(xl, "tcp option maxseg size set %d", mssinfo->mss);
+
+ return 1;
+}
+
static struct xtables_target tcpmss_tg_reg[] = {
{
.family = NFPROTO_IPV4,
@@ -104,6 +117,7 @@ static struct xtables_target tcpmss_tg_reg[] = {
.x6_parse = TCPMSS_parse,
.x6_fcheck = TCPMSS_check,
.x6_options = TCPMSS4_opts,
+ .xlate = TCPMSS_xlate,
},
{
.family = NFPROTO_IPV6,
--
2.7.4
--
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