sockfilt: handle FD_CLOSE winsock event on write socket

Learn from the way Cygwin handles and maps the WinSock events
to simulate correct and complete poll and select behaviour
according to Richard W. Stevens Network Programming book.

Follow up to #5867
Closes #5879

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/server/sockfilt.c b/tests/server/sockfilt.c
index 6b3758c94..f5281817d 100644
--- a/tests/server/sockfilt.c
+++ b/tests/server/sockfilt.c
@@ -705,7 +705,7 @@ static int select_ws(int nfds, fd_set *readfds, fd_set *writefds,
 
     if(FD_ISSET(wsasock, writefds)) {
       FD_SET(wsasock, &writesock);
-      wsaevents.lNetworkEvents |= FD_WRITE|FD_CONNECT;
+      wsaevents.lNetworkEvents |= FD_WRITE|FD_CONNECT|FD_CLOSE;
     }
 
     if(FD_ISSET(wsasock, exceptfds)) {
@@ -835,11 +835,11 @@ static int select_ws(int nfds, fd_set *readfds, fd_set *writefds,
             FD_CLR(wsasock, readfds);
 
           /* remove from descriptor set if not ready for write/connect */
-          if(!(wsaevents.lNetworkEvents & (FD_WRITE|FD_CONNECT)))
+          if(!(wsaevents.lNetworkEvents & (FD_WRITE|FD_CONNECT|FD_CLOSE)))
             FD_CLR(wsasock, writefds);
 
           /* remove from descriptor set if not exceptional */
-          if(!(wsaevents.lNetworkEvents & (FD_OOB)))
+          if(!(wsaevents.lNetworkEvents & FD_OOB))
             FD_CLR(wsasock, exceptfds);
         }
       }