anchao commented on a change in pull request #4070:
URL: https://github.com/apache/incubator-nuttx/pull/4070#discussion_r665026605
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File path: net/tcp/tcp.h
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@@ -198,6 +209,7 @@ struct tcp_conn_s
#else
uint16_t tx_unacked; /* Number bytes sent but not yet ACKed */
#endif
+ uint16_t flags; /* Flags of TCP-specific options */
Review comment:
The flags filed will be extended by TCP options and reused in the
future, such as Selective-ACK, Time-Stamp, etc.
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