From afd37e221cb97cabda9ba2edda3308ba50e4b3f9 Mon Sep 17 00:00:00 2001
From: Yang Li <yang.li@transwarp.io>
Date: Sat, 8 Feb 2025 15:04:08 +0800
Subject: [PATCH] Send FIN packet to vxlan tunnel, make sure conntrack not
 established in host

---
 tc_prog/common_kern.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tc_prog/common_kern.h b/tc_prog/common_kern.h
index e62feae..07cded8 100644
--- a/tc_prog/common_kern.h
+++ b/tc_prog/common_kern.h
@@ -26,6 +26,9 @@ int parse_5tuple_in(struct iphdr * iph, void *data_end, struct fivetuple* tuple)
     tuple->protocol = iph->protocol;
     if (proto == IPPROTO_TCP) {
         struct tcphdr *tcphdr = (struct tcphdr *)(iph + 1);
+	if (tcphdr->fin) {
+	    return 1;
+	}
         tuple->rport = tcphdr->source;
         tuple->lport = tcphdr->dest;
     } else if (proto == IPPROTO_UDP) {
@@ -50,6 +53,9 @@ int parse_5tuple_e(struct iphdr * iph, void *data_end, struct fivetuple* tuple)
     tuple->protocol = iph->protocol;
     if (proto == IPPROTO_TCP) {
         struct tcphdr *tcphdr = (struct tcphdr *)(iph + 1);
+	if (tcphdr->fin) {
+	    return 1;
+	}
         tuple->lport = tcphdr->source;
         tuple->rport = tcphdr->dest;
     } else if (proto == IPPROTO_UDP) {