de84d253da
not extraneous in the TCP Fast Open (TFO) passive-open case. In the TFO passive-open case, syncache_socket() is being called during processing of a TFO SYN bearing a valid cookie, and a call to soisconnected() is required in order to allow the application to immediately consume any data delivered in the SYN and to have a chance to generate response data to accompany the SYN-ACK. The removal of this call to soisconnected() effectively converted all TFO passive opens to having the same RTT cost as a standard 3WHS. This commit adds a call to soisconnected() to syncache_tfo_expand() so that it is only in the TFO passive-open path, thereby restoring TFO passve-open RTT performance and preserving the non-TFO connection-rate performance gains realized by r307966. MFC after: 1 week Sponsored by: Limelight Networks
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