diff options
Diffstat (limited to 'net/mptcp/options.c')
| -rw-r--r-- | net/mptcp/options.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index 38583d1b9b5f..b4458ecd01f8 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -868,6 +868,17 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb, if (mp_opt.use_ack) update_una(msk, &mp_opt); + /* Zero-length packets, like bare ACKs carrying a DATA_FIN, are + * dropped by the caller and not propagated to the MPTCP layer. + * Copy the DATA_FIN information now. + */ + if (TCP_SKB_CB(skb)->seq == TCP_SKB_CB(skb)->end_seq) { + if (mp_opt.data_fin && mp_opt.data_len == 1 && + mptcp_update_rcv_data_fin(msk, mp_opt.data_seq) && + schedule_work(&msk->work)) + sock_hold(subflow->conn); + } + mpext = skb_ext_add(skb, SKB_EXT_MPTCP); if (!mpext) return; |