int pkt_len = skb->len - skb_inner_network_offset(skb);
struct net *net = dev_net(rt->dst.dev);
struct net_device *dev = skb->dev;
+ int skb_iif = skb->skb_iif;
struct iphdr *iph;
int err;
skb_dst_set(skb, &rt->dst);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+ if (skb_iif && proto == IPPROTO_UDP) {
+ /* Arrived from an ingress interface and got udp encapuslated.
+ * The encapsulated network segment length may exceed dst mtu.
+ * Allow IP Fragmentation of segments.
+ */
+ IPCB(skb)->flags |= IPSKB_FRAG_SEGS;
+ }
+
/* Push down and install the IP header. */
skb_push(skb, sizeof(struct iphdr));
skb_reset_network_header(skb);