*** WSAEHOSTUNREACH – 10065 ***
Description
No route to host.
Notes
A socket operation was attempted to an unreachable host. See WSAENETUNREACH.
Category: Other
*** WSAECONNREFUSED – 10061 ***
Description
Connection refused.
Notes
No connection could be made because the target computer actively refused it. This usually results from trying to connect to a service that is inactive on the foreign host—that is, one with no server application running.
*** WSAETIMEDOUT – 10060 ***
Description
Connection timed out.
Notes
A connection attempt failed because the connected party did not properly respond after a period of time, or the established connection failed because the connected host has failed to respond.
*** WSAENOTCONN – 10057 ***
Description
Socket is not connected.
Notes
A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using sendto) no address was supplied. Any other type of operation might also return this error—for example, setsockopt setting SO_KEEPALIVE if the connection has been reset.
*** WSAEISCONN – 10056 ***
Description
Socket is already connected.
Notes
A connect request was made on an already-connected socket. Some implementations also return this error if sendto is called on a connected SOCK_DGRAM socket (for SOCK_STREAM sockets, the to parameter in sendto is ignored) although other implementations treat this as a legal occurrence.
*** WSAENOBUFS – 10055 ***
Description
No buffer space available.
Notes
An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
*** WSAECONNRESET – 10054 ***
Description
Connection reset by peer.
Notes
An existing connection was forcibly closed by the remote host. This normally results if the peer application on the remote host is suddenly stopped, the host is rebooted, the host or remote network interface is disabled, or the remote host uses a hard close (see setsockopt for more information on the SO_LINGER option on the remote socket). This error may also result if a connection was broken due to keep-alive activity detecting a failure while one or more operations are in progress. Operations that were in progress fail with WSAENETRESET. Subsequent operations fail with WSAECONNRESET.
*** WSAECONNABORTED – 10053 ***
Description
Software caused connection abort.
Notes
An established connection was aborted by the software in your host computer, possibly due to a data transmission time-out or protocol error.
*** WSAENETRESET – 10052 ***
Description
Network dropped connection on reset.
Notes
The connection has been broken due to keep-alive activity detecting a failure while the operation was in progress. It can also be returned by setsockopt if an attempt is made to set SO_KEEPALIVE on a connection that has already failed.
*** WSAENETUNREACH – 10051 ***
Description
Network is unreachable.
Notes
A socket operation was attempted to an unreachable network. This usually means the local software knows no route to reach the remote host.