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With fastopen in place, the first subflow socket is created before the MPC handshake completes, and we need to properly initialize the sequence numbers at MPC ACK reception. Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Dmytro Shytyi <dmytro@shytyi.net> Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
29 lines
871 B
C
29 lines
871 B
C
// SPDX-License-Identifier: GPL-2.0
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/* MPTCP Fast Open Mechanism
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*
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* Copyright (c) 2021-2022, Dmytro SHYTYI
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*/
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#include "protocol.h"
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void mptcp_fastopen_gen_msk_ackseq(struct mptcp_sock *msk, struct mptcp_subflow_context *subflow,
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const struct mptcp_options_received *mp_opt)
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{
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struct sock *sk = (struct sock *)msk;
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struct sk_buff *skb;
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mptcp_data_lock(sk);
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skb = skb_peek_tail(&sk->sk_receive_queue);
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if (skb) {
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WARN_ON_ONCE(MPTCP_SKB_CB(skb)->end_seq);
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pr_debug("msk %p moving seq %llx -> %llx end_seq %llx -> %llx", sk,
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MPTCP_SKB_CB(skb)->map_seq, MPTCP_SKB_CB(skb)->map_seq + msk->ack_seq,
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MPTCP_SKB_CB(skb)->end_seq, MPTCP_SKB_CB(skb)->end_seq + msk->ack_seq);
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MPTCP_SKB_CB(skb)->map_seq += msk->ack_seq;
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MPTCP_SKB_CB(skb)->end_seq += msk->ack_seq;
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}
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pr_debug("msk=%p ack_seq=%llx", msk, msk->ack_seq);
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mptcp_data_unlock(sk);
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}
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