From: Davide Caratti <dcaratti@redhat.com>
To: mptcp@lists.linux.dev
Cc: Matthieu Baerts <matthieu.baerts@tessares.net>
Subject: [PATCH net-next] mptcp: drop all sub-options except ADD_ADDR when the echo bit is set
Date: Fri, 26 Mar 2021 13:28:19 +0100 [thread overview]
Message-ID: <aeb4b7f3044e2f869ae026f950eb70c4398dad63.1616761454.git.dcaratti@redhat.com> (raw)
Current Linux carries echo-ed ADD_ADDR over pure TCP ACKs, so there is no
need to add a DSS element that would fit only ADD_ADDR with IPv4 address.
Drop the DSS from echo-ed ADD_ADDR, regardless of the IP version.
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
---
net/mptcp/options.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index c7eb61d0564c..d51c3ad54d9a 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -624,7 +624,8 @@ static bool mptcp_established_options_add_addr(struct sock *sk, struct sk_buff *
int len;
if ((mptcp_pm_should_add_signal_ipv6(msk) ||
- mptcp_pm_should_add_signal_port(msk)) &&
+ mptcp_pm_should_add_signal_port(msk) ||
+ mptcp_pm_should_add_signal_echo(msk)) &&
skb && skb_is_tcp_pure_ack(skb)) {
pr_debug("drop other suboptions");
opts->suboptions = 0;
--
2.30.2
next reply other threads:[~2021-03-26 12:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 12:28 Davide Caratti [this message]
2021-03-26 13:57 ` [PATCH net-next] mptcp: drop all sub-options except ADD_ADDR when the echo bit is set Davide Caratti
2021-03-26 18:39 ` Mat Martineau
2021-03-30 13:43 ` Matthieu Baerts
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