X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Frecvfrom.c;h=891259e1713633b2ac37fb95205b63caac78403e;hb=a8a1dc286152661e640f0839e3ccd79e0898db6d;hp=a9c0affea5f5b9e95a0d7eb800dd58902c0c79fa;hpb=441aa3044f43e5572f58c354f01e6bc070acd5c7;p=gnulib.git

diff --git a/lib/recvfrom.c b/lib/recvfrom.c
index a9c0affea..891259e17 100644
--- a/lib/recvfrom.c
+++ b/lib/recvfrom.c
@@ -1,6 +1,6 @@
 /* recvfrom.c --- wrappers for Windows recvfrom function
 
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -28,21 +28,31 @@
 
 #undef recvfrom
 
-int
-rpl_recvfrom (int fd, void *buf, int len, int flags, struct sockaddr *from,
-              int *fromlen)
+ssize_t
+rpl_recvfrom (int fd, void *buf, size_t len, int flags, struct sockaddr *from,
+              socklen_t *fromlen)
 {
-  int frombufsize = *fromlen;
   SOCKET sock = FD_TO_SOCKET (fd);
-  int r = recvfrom (sock, buf, len, flags, from, fromlen);
 
-  if (r < 0)
-    set_winsock_errno ();
-
-  /* Winsock recvfrom() only returns a valid 'from' when the socket is
-     connectionless.  POSIX gives a valid 'from' for all types of sockets.  */
-  else if (*fromlen == frombufsize)
-    rpl_getpeername (fd, from, fromlen);
-
-  return r;
+  if (sock == INVALID_SOCKET)
+    {
+      errno = EBADF;
+      return -1;
+    }
+  else
+    {
+      int frombufsize = (from != NULL ? *fromlen : 0);
+      int r = recvfrom (sock, buf, len, flags, from, fromlen);
+
+      if (r < 0)
+        set_winsock_errno ();
+
+      /* Winsock recvfrom() only returns a valid 'from' when the socket is
+         connectionless.  POSIX gives a valid 'from' for all types of
+         sockets.  */
+      else if (from != NULL && *fromlen == frombufsize)
+        rpl_getpeername (fd, from, fromlen);
+
+      return r;
+    }
 }