added code to attempt stateful detection of path mtu based on interna…

…l tcp session initiation
r-caamano · Dec 23, 2023 · bfe15f9 · bfe15f9
1 parent e7b5794
commit bfe15f9
Showing 1 changed file with 3 additions and 4 deletions.
diff --git a/src/zfw_tc_ingress.c b/src/zfw_tc_ingress.c
@@ -744,17 +744,16 @@ int bpf_sk_splice(struct __sk_buff *skb){
                     sk = bpf_skc_lookup_tcp(skb, o_session, sizeof(o_session->ipv4),BPF_F_CURRENT_NETNS, 0);
                     //bpf_printk("fragmentation needed srcip=%x, destip=%x, dport=%d", inner_iph->saddr, inner_iph->daddr, bpf_ntohs(o_session->ipv4.dport));
                     if(sk){
-                        /*if (sk->state != BPF_TCP_LISTEN){
+                        if (sk->state == BPF_TCP_LISTEN){
                             if(local_diag->verbose){
 
                                 send_event(&event);
                             }
+                            bpf_printk("fragmentation needed srcip=%x, destip=%x, dport=%d", inner_iph->saddr, inner_iph->daddr, bpf_ntohs(o_session->ipv4.dport));
                             bpf_sk_release(sk);
                             return TC_ACT_OK;
-                        }*/
-                        bpf_printk("fragmentation needed srcip=%x, destip=%x, dport=%d", inner_iph->saddr, inner_iph->daddr, bpf_ntohs(o_session->ipv4.dport));
+                        }
                         bpf_sk_release(sk);
-                        return TC_ACT_OK;
                     }else{
                         bpf_printk("not sK");
                     }