Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Dmytro Shytyi |
144 |
58.06% |
2 |
11.76% |
| Paolo Abeni |
61 |
24.60% |
8 |
47.06% |
| Florian Westphal |
22 |
8.87% |
3 |
17.65% |
| Mat Martineau |
16 |
6.45% |
2 |
11.76% |
| Christoph Paasch |
4 |
1.61% |
1 |
5.88% |
| Wyatt Feng |
1 |
0.40% |
1 |
5.88% |
| Total |
248 |
|
17 |
|
// SPDX-License-Identifier: GPL-2.0
/* MPTCP Fast Open Mechanism
*
* Copyright (c) 2021-2022, Dmytro SHYTYI
*/
#include "protocol.h"
void mptcp_fastopen_subflow_synack_set_params(struct mptcp_subflow_context *subflow,
struct request_sock *req)
{
struct sock *sk, *ssk;
struct sk_buff *skb;
struct tcp_sock *tp;
bool has_rxtstamp;
/* on early fallback the subflow context is deleted by
* subflow_syn_recv_sock()
*/
if (!subflow)
return;
ssk = subflow->tcp_sock;
sk = subflow->conn;
tp = tcp_sk(ssk);
/* A valid TFO cookie does not guarantee SYN data. */
skb = skb_peek(&ssk->sk_receive_queue);
if (!skb)
return;
subflow->is_mptfo = 1;
/* dequeue the skb from sk receive queue */
__skb_unlink(skb, &ssk->sk_receive_queue);
skb_ext_reset(skb);
mptcp_subflow_lend_fwdmem(subflow, skb);
/* We copy the fastopen data, but that don't belong to the mptcp sequence
* space, need to offset it in the subflow sequence, see mptcp_subflow_get_map_offset()
*/
tp->copied_seq += skb->len;
subflow->ssn_offset += skb->len;
has_rxtstamp = TCP_SKB_CB(skb)->has_rxtstamp;
/* Only the sequence delta is relevant */
MPTCP_SKB_CB(skb)->map_seq = -skb->len;
MPTCP_SKB_CB(skb)->end_seq = 0;
MPTCP_SKB_CB(skb)->offset = 0;
MPTCP_SKB_CB(skb)->has_rxtstamp = has_rxtstamp;
MPTCP_SKB_CB(skb)->cant_coalesce = 1;
mptcp_data_lock(sk);
DEBUG_NET_WARN_ON_ONCE(sock_owned_by_user_nocheck(sk));
mptcp_borrow_fwdmem(sk, skb);
skb_set_owner_r(skb, sk);
__skb_queue_tail(&sk->sk_receive_queue, skb);
mptcp_sk(sk)->bytes_received += skb->len;
sk->sk_data_ready(sk);
mptcp_data_unlock(sk);
}