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| author | Wei Wang <weiwan@google.com> | 2020-09-09 17:50:46 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-10 13:15:40 -0700 |
| commit | e9b12edc133b54e15ecd105620d51fb8e8fa8bde (patch) | |
| tree | 7856c1f4c9a95b927f9cac14a7cef33842209cd3 /include/linux/tcp.h | |
| parent | 3a8c4ad161d48d9674a340f2dea916ae560c3e9d (diff) | |
| download | linux-e9b12edc133b54e15ecd105620d51fb8e8fa8bde.tar.gz linux-e9b12edc133b54e15ecd105620d51fb8e8fa8bde.tar.bz2 linux-e9b12edc133b54e15ecd105620d51fb8e8fa8bde.zip | |
tcp: record received TOS value in the request socket
A new field is added to the request sock to record the TOS value
received on the listening socket during 3WHS:
When not under syn flood, it is recording the TOS value sent in SYN.
When under syn flood, it is recording the TOS value sent in the ACK.
This is a preparation patch in order to do TOS reflection in the later
commit.
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/tcp.h')
| -rw-r--r-- | include/linux/tcp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 56ff2952edaf..2f87377e9af7 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -134,6 +134,7 @@ struct tcp_request_sock { * FastOpen it's the seq# * after data-in-SYN. */ + u8 syn_tos; }; static inline struct tcp_request_sock *tcp_rsk(const struct request_sock *req) |