Deprecated since 7.45.0. Use CURLINFO_ACTIVESOCKET(3) instead.
Pass a pointer to a long to receive the last socket used by this curl
session. If the socket is no longer valid, -1 is returned. When you finish
working with the socket, you must call curl_easy_cleanup() as usual and let
libcurl close the socket and cleanup other resources associated with the
handle. This is typically used in combination with
NOTE: this API is deprecated since it is not working on win64 where the SOCKET
type is 64 bits large while its long is 32 bits. Use the
CURLINFO_ACTIVESOCKET(3) instead, if possible.