Message ID | 20190423184349.544-2-willemdebruijn.kernel@gmail.com |
---|---|
State | Accepted |
Delegated to: | BPF Maintainers |
Headers | show |
Series | update skb->protocol in bpf_skb_net_grow | expand |
diff --git a/net/core/filter.c b/net/core/filter.c index edb3a7c22f6c3..2f88baf39cc20 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3081,6 +3081,14 @@ static int bpf_skb_net_grow(struct sk_buff *skb, u32 off, u32 len_diff, skb_set_transport_header(skb, mac_len + nh_len); } + + /* Match skb->protocol to new outer l3 protocol */ + if (skb->protocol == htons(ETH_P_IP) && + flags & BPF_F_ADJ_ROOM_ENCAP_L3_IPV6) + skb->protocol = htons(ETH_P_IPV6); + else if (skb->protocol == htons(ETH_P_IPV6) && + flags & BPF_F_ADJ_ROOM_ENCAP_L3_IPV4) + skb->protocol = htons(ETH_P_IP); } if (skb_is_gso(skb)) {