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author | Jerry Chu <hkchu@google.com> | 2012-08-31 12:29:11 +0000 |
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committer | David S. Miller <davem@davemloft.net> | 2012-08-31 20:02:18 -0400 |
commit | 1046716368979dee857a2b8a91c4a8833f21b9cb (patch) | |
tree | fdda70278e6fa56c27d242fb1a0ec9b7e3e81d38 /net/core/request_sock.c | |
parent | 2a35cfa591ac63f17815c2d9432b799e37527980 (diff) | |
download | linux-1046716368979dee857a2b8a91c4a8833f21b9cb.tar.gz linux-1046716368979dee857a2b8a91c4a8833f21b9cb.tar.bz2 linux-1046716368979dee857a2b8a91c4a8833f21b9cb.zip |
tcp: TCP Fast Open Server - header & support functions
This patch adds all the necessary data structure and support
functions to implement TFO server side. It also documents a number
of flags for the sysctl_tcp_fastopen knob, and adds a few Linux
extension MIBs.
In addition, it includes the following:
1. a new TCP_FASTOPEN socket option an application must call to
supply a max backlog allowed in order to enable TFO on its listener.
2. A number of key data structures:
"fastopen_rsk" in tcp_sock - for a big socket to access its
request_sock for retransmission and ack processing purpose. It is
non-NULL iff 3WHS not completed.
"fastopenq" in request_sock_queue - points to a per Fast Open
listener data structure "fastopen_queue" to keep track of qlen (# of
outstanding Fast Open requests) and max_qlen, among other things.
"listener" in tcp_request_sock - to point to the original listener
for book-keeping purpose, i.e., to maintain qlen against max_qlen
as part of defense against IP spoofing attack.
3. various data structure and functions, many in tcp_fastopen.c, to
support server side Fast Open cookie operations, including
/proc/sys/net/ipv4/tcp_fastopen_key to allow manual rekeying.
Signed-off-by: H.K. Jerry Chu <hkchu@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/request_sock.c')
0 files changed, 0 insertions, 0 deletions