The tcp_info structs provides useful stats about the current TCP connection. However, I am unsure which flow these stats refer to.
For a bidirectional connection, meaning a fd is both read from and written to, what does some of the stat refer to? The outbound flow or the inbound flow?
Eg. does tcp_info.tcpi_rcv_space refer to the receive buffer size of the inbound flow of the local machine, i.e., the receive buffer of the local machine, or the advertised size of the receive buffer of the outbound flow to the remote machine, i.e., receive buffer of the remote machine?
Many thanks!