...

• NetSock_CfgBlock() (TCP/UDP)
• NetSock_CfgSecure() (TCP)
• NetSock_CfgRxQ_Size() (TCP/UDP)
• NetSock_CfgTxQ_Size() (TCP/UDP)
• NetSock_CfgTxIP_TOS() (TCP/UDP)
• NetSock_CfgTxIP_TTL() (TCP/UDP)
• NetSock_CfgTxIP_TTL_Multicast() (TCP/UDP)
• NetSock_CfgTimeoutConnAcceptDflt() (TCP)
• NetSock_CfgTimeoutConnAcceptGet_ms() (TCP)
• NetSock_CfgTimeoutConnAcceptSet() (TCP)
• NetSock_CfgTimeoutConnCloseDflt() (TCP)
• NetSock_CfgTimeoutConnCloseGet_ms() (TCP)
• NetSock_CfgTimeoutConnCloseSet() (TCP)
• NetSock_CfgTimeoutConnReqDflt() (TCP)
• NetSock_CfgTimeoutConnReqGet_ms() (TCP)
• NetSock_CfgTimeoutConnReqSet() (TCP)
• NetSock_CfgTimeoutRxQ_Dflt() (TCP/UDP)
• NetSock_CfgTimeoutRxQ_Get_ms() (TCP/UDP)
• NetSock_CfgTimeoutRxQ_Set() (TCP/UDP)
• NetSock_CfgTimeoutTxQ_Dflt() (TCP)
• NetSock_CfgTimeoutTxQ_Get_ms() (TCP)
• NetSock_CfgTimeoutTxQ_Set() (TCP)

...

For UDP sockets, the sockets close() without delay. Thus, the next bind() is not blocked.

TCP Keep-Alives (TODO)

µCµC/TCP-IP does not currently support TCP Keep-Alives. If both ends of the connection are running different Network Protocol Stacks, you may attempt to enable TCP Keep-Alives on the remote side. Alternatively, the application will have to send something through the socket to the remote peer in order to ensure that the TCP connection remains openRFC  #1122 stipulate that "Keep-Alive mechanism periodically probes the other end of a connection when connection is otherwise idle, even when there is not data to be sent." 

It is possible to enable the Keep-Alive option for a specific socket by using the function NetSock_OptSet() with the option NET_SOCK_OPT_SOCK_KEEP_ALIVE.

Knowing your TCP connection ID, you can also used the API function NetTCP_ConnCfgTxKeepAliveEn().

Each time the connection Idle timeout occurs, the stack will send a keep-alive message to probe the other end of the connection. The timeout value for a given TCP connection can be set with the NetSock_OptSet() function and the NET_SOCK_OPT_TCP_KEEP_IDLE option. Else, knowing your TCP connection ID, the API function NetTCP_ConnCfgIdleTimeout()can also be use.