1 files changed, 130 insertions, 0 deletions
diff --git a/usr/src/lib/libsocket/socket/socketpair.c b/usr/src/lib/libsocket/socket/socketpair.c
new file mode 100644
index 0000000000..d9bbc8f461
--- /dev/null
+++ b/usr/src/lib/libsocket/socket/socketpair.c
@@ -0,0 +1,130 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
+/*	  All Rights Reserved   */
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stropts.h>
+#include <sys/stream.h>
+#include <sys/socketvar.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+extern int _socket_create(int, int, int, int);
+extern int _so_socketpair(int*);
+
+int _socketpair_create(int, int, int, int*, int);
+
+#pragma weak socketpair = _socketpair
+
+int
+_socketpair(int family, int type, int protocol, int sv[2])
+{
+	return (_socketpair_create(family, type, protocol, sv, SOV_DEFAULT));
+}
+
+/*
+ * Used by the BCP library.
+ */
+int
+_socketpair_bsd(int family, int type, int protocol, int sv[2])
+{
+	return (_socketpair_create(family, type, protocol, sv, SOV_SOCKBSD));
+}
+
+int
+_socketpair_svr4(int family, int type, int protocol, int sv[2])
+{
+	return (_socketpair_create(family, type, protocol, sv,
+				SOV_SOCKSTREAM));
+}
+
+int
+__xnet_socketpair(int family, int type, int protocol, int sv[2])
+{
+	return (_socketpair_create(family, type, protocol, sv,
+				SOV_XPG4_2));
+}
+
+int
+_socketpair_create(int family, int type, int protocol, int sv[2], int version)
+{
+	int res;
+	int fd1, fd2;
+
+	/*
+	 * Create the two sockets and pass them to _so_socketpair, which
+	 * will connect them together.
+	 */
+	fd1 = _socket_create(family, type, protocol, version);
+	if (fd1 < 0)
+		return (-1);
+	fd2 = _socket_create(family, type, protocol, version);
+	if (fd2 < 0) {
+		int error = errno;
+
+		(void) close(fd1);
+		errno = error;
+		return (-1);
+	}
+	sv[0] = fd1;
+	sv[1] = fd2;
+	res = _so_socketpair(sv);
+	if (res < 0) {
+		int error = errno;
+
+		(void) close(fd1);
+		(void) close(fd2);
+		errno = error;
+		return (-1);
+	}
+	/*
+	 * Check if kernel returned different fds in which case we close
+	 * the original ones. This is the case for SOCK_STREAM where
+	 * one of the original sockets is used as a listener and
+	 * _so_socketpair passes out the newly accepted socket.
+	 */
+	if (sv[0] != fd1)
+		(void) close(fd1);
+	if (sv[1] != fd2)
+		(void) close(fd2);
+	return (res);
+}