* fhandler_socket (fhandler_socket::readv): Call recv_internal directly,

rather than recvmsg.
	(fhandler_socket::writev): Call send_internal directly, rather than
	sendmsg.
	* net.cc (cygwin_recv): Call fhandler_socket::recvfrom directly, rather
	than cygwin_recvfrom.
	(cygwin_send): Call fhandler_socket::sendto directly, rather than
	cygwin_sendto.

winsup/cygwin/fhandler_socket.cc

@@ -1368,18 +1368,16 @@ int
 fhandler_socket::readv (const struct iovec *const iov, const int iovcnt,
 			ssize_t tot)
 {
-  struct msghdr msg =
+  WSABUF wsabuf[iovcnt];
+  WSABUF *wsaptr = wsabuf + iovcnt;
+  const struct iovec *iovptr = iov + iovcnt;
+  while (--wsaptr >= wsabuf)
     {
-      msg_name:		NULL,
+      wsaptr->len = (--iovptr)->iov_len;
-      msg_namelen:	0,
+      wsaptr->buf = (char *) iovptr->iov_base;
-      msg_iov:		(struct iovec *) iov, // const_cast
+    }
-      msg_iovlen:	iovcnt,
+  WSAMSG wsamsg = { NULL, 0, wsabuf, iovcnt, { 0,  NULL}, 0 };
-      msg_control:	NULL,
+  return recv_internal (&wsamsg);
-      msg_controllen:	0,
-      msg_flags:	0
-    };
-
-  return recvmsg (&msg, 0);
 }
 
 extern "C" {
@@ -1580,18 +1578,16 @@ int
 fhandler_socket::writev (const struct iovec *const iov, const int iovcnt,
 			 ssize_t tot)
 {
-  struct msghdr msg =
+  WSABUF wsabuf[iovcnt];
+  WSABUF *wsaptr = wsabuf;
+  const struct iovec *iovptr = iov;
+  for (int i = 0; i < iovcnt; ++i)
     {
-      msg_name:		NULL,
+      wsaptr->len = iovptr->iov_len;
-      msg_namelen:	0,
+      (wsaptr++)->buf = (char *) (iovptr++)->iov_base;
-      msg_iov:		(struct iovec *) iov, // const_cast
+    }
-      msg_iovlen:	iovcnt,
+  WSAMSG wsamsg = { NULL, 0, wsabuf, iovcnt, { 0, NULL}, 0 };
-      msg_control:	NULL,
+  return send_internal (&wsamsg, 0);
-      msg_controllen:	0,
-      msg_flags:	0
-    };
-
-  return sendmsg (&msg, 0);
 }
 
 inline ssize_t

winsup/cygwin/net.cc

@@ -643,7 +643,6 @@ cygwin_sendto (int fd, const void *buf, size_t len, int flags,
 
   syscall_printf ("%d = sendto (%d, %p, %d, %x, %p, %d)",
 		  res, fd, buf, len, flags, to, tolen);
-
   return res;
 }
 
@@ -664,7 +663,6 @@ cygwin_recvfrom (int fd, void *buf, size_t len, int flags,
 
   syscall_printf ("%d = recvfrom (%d, %p, %d, %x, %p, %p)",
 		  res, fd, buf, len, flags, from, fromlen);
-
   return res;
 }
 
@@ -1448,14 +1446,36 @@ cygwin_getpeername (int fd, struct sockaddr *name, socklen_t *len)
 extern "C" int
 cygwin_recv (int fd, void *buf, size_t len, int flags)
 {
-  return cygwin_recvfrom (fd, buf, len, flags, NULL, NULL);
+  int res;
+
+  fhandler_socket *fh = get (fd);
+
+  myfault efault;
+  if (efault.faulted (EFAULT) || !fh)
+    res = -1;
+  else if ((res = len) != 0)
+    res = fh->recvfrom (buf, len, flags, NULL, NULL);
+
+  syscall_printf ("%d = recv (%d, %p, %d, %x)", res, fd, buf, len, flags);
+  return res;
 }
 
 /* exported as send: standards? */
 extern "C" int
 cygwin_send (int fd, const void *buf, size_t len, int flags)
 {
-  return cygwin_sendto (fd, buf, len, flags, NULL, 0);
+  int res;
+
+  fhandler_socket *fh = get (fd);
+
+  myfault efault;
+  if (efault.faulted (EFAULT) || !fh)
+    res = -1;
+  else
+    res = fh->sendto (buf, len, flags, NULL, 0);
+
+  syscall_printf ("%d = send (%d, %p, %d, %x)", res, fd, buf, len, flags);
+  return res;
 }
 
 /* getdomainname: standards? */