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authorDaniel Lee <Longinus00@gmail.com>2015-04-06 14:37:27 -0700
committerDavid S. Miller <davem@davemloft.net>2015-04-07 18:36:39 -0400
commit2646c831c00c5d22aa72b79d24069c1b412cda7c (patch)
treef6e61181b9dc10969a0501fc1e3a8af5be021dfe /drivers/clk
parent7f9b838b71eb78a27de27a12ca5de8542fac3115 (diff)
downloadlinux-2646c831c00c5d22aa72b79d24069c1b412cda7c.tar.bz2
tcp: RFC7413 option support for Fast Open client
Fast Open has been using an experimental option with a magic number (RFC6994). This patch makes the client by default use the RFC7413 option (34) to get and send Fast Open cookies. This patch makes the client solicit cookies from a given server first with the RFC7413 option. If that fails to elicit a cookie, then it tries the RFC6994 experimental option. If that also fails, it uses the RFC7413 option on all subsequent connect attempts. If the server returns a Fast Open cookie then the client caches the form of the option that successfully elicited a cookie, and uses that form on later connects when it presents that cookie. The idea is to gradually obsolete the use of experimental options as the servers and clients upgrade, while keeping the interoperability meanwhile. Signed-off-by: Daniel Lee <Longinus00@gmail.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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