Motivation: TCP Fast Open allows data to be carried in the SYN and SYN-ACK packets and consumed by the receiving end during the initial connection handshake, and saves up to one full round-trip time (RTT) compared to the standard TCP, which requires a three-way handshake (3WHS) to complete before data can be exchanged. This commit enables support for TFO on server sockets. Modifications: Added new Integer Option TCP_FASTOPEN in EpollChannelOption. Added getters/setters in EpollServerChannelConfig for TCP_FASTOPEN. Added way to check if TCP_FASTOPEN is supported on server in Native. Added setting on socket opt TCP_FASTOPEN if value is set on channel options in doBind in EpollServerSocketChannel. Enhanced EpollSocketTestPermutation to contain a permutation for server socket containing fast open. Result: Users of native-epoll can set TCP_FASTOPEN on server sockets and thus leverage fast connect features of RFC7413 if client is capable of it. Conflicts: transport-native-epoll/src/main/java/io/netty/channel/epoll/EpollChannelOption.java |
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README.md |
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