2007-09-21 Joel Sherrill <joel.sherrill@oarcorp.com>

* libnetworking/Makefile.am: Add dummy socketpair() implementation to
	document what is required to provide a fully functional
	implementation.
	* libnetworking/rtems/rtems_socketpair.c: New file.

cpukit/ChangeLog

@@ -1,3 +1,10 @@
+2007-09-21	Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	* libnetworking/Makefile.am: Add dummy socketpair() implementation to
+	document what is required to provide a fully functional
+	implementation.
+	* libnetworking/rtems/rtems_socketpair.c: New file.
+
 2007-09-21	Ralf Corsépius <ralf.corsepius@rtems.org>
 
 	* aclocal/version.m4: Bump RTEMS_API to 4.9.

cpukit/libnetworking/Makefile.am

@@ -121,8 +121,9 @@ libnetworking_a_SOURCES += rtems/sghostname.c rtems/issetugid.c \
     rtems/rtems_showmbuf.c rtems/rtems_showroute.c rtems/rtems_showifstat.c \
     rtems/rtems_showipstat.c rtems/rtems_showicmpstat.c \
     rtems/rtems_showtcpstat.c rtems/rtems_showudpstat.c rtems/rtems_select.c \
-    rtems/mkrootfs.c rtems/rtems_bsdnet_malloc_starvation.c
+    rtems/mkrootfs.c rtems/rtems_bsdnet_malloc_starvation.c \
-libnetworking_a_SOURCES += rtems/rtems_mii_ioctl.c rtems/rtems_mii_ioctl_kern.c
+    rtems/rtems_mii_ioctl.c rtems/rtems_mii_ioctl_kern.c \
+    rtems/rtems_socketpair.c
 
 ## sys
 

cpukit/libnetworking/rtems/rtems_socketpair.c

@@ -0,0 +1,51 @@
+/*
+ *  socketpair() for RTEMS
+ *
+ *  This file exists primarily to document what is required to provide
+ *  a functional implementation of socketpair() for RTEMS. 
+ *
+ *  The socketpair() service requires that the "local domain" sockets
+ *  be functional.  This is denoted by the domain constants AF_LOCAL
+ *  and AF_UNIX and the protocol constants PF_LOCAL and PF_UNIX.  The
+ *  local domain functionality is implemented in the file kern/uipc_usrreq.c
+ *  which was not part of the initial port of the FreeBSD stack to
+ *  RTEMS.  
+ *
+ *  The FreeBSD socketpair implementation appears to be dependent on
+ *  file system features which are not available currently in RTEMS.
+ *  
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+
+int socketpair (int domain, int type, int protocol, int *rsv)
+{
+  if ( !rsv ) {
+    errno = EFAULT;
+    return -1;
+  }
+
+  /*
+   *  Yes, we do not support socketpair() so this is really paranoid.
+   *  But it ensures that someone calling this routine and ignoring
+   *  the return status will get errors from subsequent socket calls.
+   */
+  rsv[ 0 ] = -1;
+  rsv[ 1 ] = -1;
+  errno = ENOSYS;
+  return -1;
+}