diff options
| author | Dmytro Shytyi <dmytro@shytyi.net> | 2022-11-26 01:29:51 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-11-30 07:24:25 +0300 |
| commit | 36b122baf6a8bd46b4a591f12f4ed17b22257408 (patch) | |
| tree | ec7cb63c0adeacab7199cac9c0722899543686e1 /net/mptcp/protocol.c | |
| parent | dfc8d06030335a816d81aa92fe5d1f84d06998ad (diff) | |
| download | linux-36b122baf6a8bd46b4a591f12f4ed17b22257408.tar.xz | |
mptcp: add subflow_v(4,6)_send_synack()
The send_synack() needs to be overridden for MPTCP to support TFO for
two reasons:
- There is not be enough space in the TCP options if the TFO cookie has
to be added in the SYN+ACK with other options: MSS (4), SACK OK (2),
Timestamps (10), Window Scale (3+1), TFO (10+2), MP_CAPABLE (12).
MPTCPv1 specs -- RFC 8684, section B.1 [1] -- suggest to drop the TCP
timestamps option in this case.
- The data received in the SYN has to be handled: the SKB can be
dequeued from the subflow sk and transferred to the MPTCP sk. Counters
need to be updated accordingly and the application can be notified at
the end because some bytes have been received.
[1] https://www.rfc-editor.org/rfc/rfc8684.html#section-b.1
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>
Diffstat (limited to 'net/mptcp/protocol.c')
| -rw-r--r-- | net/mptcp/protocol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 3fa0aa44bf5b..b0d387be500a 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -191,7 +191,7 @@ static void mptcp_rfree(struct sk_buff *skb) mptcp_rmem_uncharge(sk, len); } -static void mptcp_set_owner_r(struct sk_buff *skb, struct sock *sk) +void mptcp_set_owner_r(struct sk_buff *skb, struct sock *sk) { skb_orphan(skb); skb->sk = sk; |