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| author | Jakub Kicinski <kuba@kernel.org> | 2024-09-12 01:57:53 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-09-12 01:57:53 +0300 |
| commit | 9ee926213fc814d2c27fc67257ba5cc00a0ec910 (patch) | |
| tree | b2b59e53ce7fee633efeb019b4903cba0b649ac8 /include | |
| parent | 8b5d2e5cf04f61af75c751cc8fcb1886f8bcef5a (diff) | |
| parent | 27069e7cb3d1cea9377069266acf19b9cc5ad0ae (diff) | |
| download | linux-9ee926213fc814d2c27fc67257ba5cc00a0ec910.tar.xz | |
Merge branch 'mptcp-fallback-to-tcp-after-3-mpc-drop-cache'
Matthieu Baerts says:
====================
mptcp: fallback to TCP after 3 MPC drop + cache
The SYN + MPTCP_CAPABLE packets could be explicitly dropped by firewalls
somewhere in the network, e.g. if they decide to drop packets based on
the TCP options, instead of stripping them off.
The idea of this series is to fallback to TCP after 3 SYN+MPC drop
(patch 2). If the connection succeeds after the fallback, it very likely
means a blackhole has been detected. In this case (patch 3), MPTCP can
be disabled for a certain period of time, 1h by default. If after this
period, MPTCP is still blocked, the period is doubled. This technique is
inspired by the one used by TCP FastOpen.
This should help applications which want to use MPTCP by default on the
client side if available.
====================
Link: https://patch.msgid.link/20240909-net-next-mptcp-fallback-x-mpc-v1-0-da7ebb4cd2a3@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/mptcp.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/net/mptcp.h b/include/net/mptcp.h index 0bc4ab03f487..814b5f2e3ed5 100644 --- a/include/net/mptcp.h +++ b/include/net/mptcp.h @@ -223,6 +223,8 @@ static inline __be32 mptcp_reset_option(const struct sk_buff *skb) return htonl(0u); } + +void mptcp_active_detect_blackhole(struct sock *sk, bool expired); #else static inline void mptcp_init(void) @@ -307,6 +309,8 @@ static inline struct request_sock *mptcp_subflow_reqsk_alloc(const struct reques } static inline __be32 mptcp_reset_option(const struct sk_buff *skb) { return htonl(0u); } + +static inline void mptcp_active_detect_blackhole(struct sock *sk, bool expired) { } #endif /* CONFIG_MPTCP */ #if IS_ENABLED(CONFIG_MPTCP_IPV6) |