1 files changed, 107 insertions, 0 deletions
diff --git a/lib/libc/rpc/bindresvport.c b/lib/libc/rpc/bindresvport.c
new file mode 100644
index 0000000..5d97adc
--- /dev/null
+++ b/lib/libc/rpc/bindresvport.c
@@ -0,0 +1,107 @@
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part.  Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+/*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/
+/*static char *sccsid = "from: @(#)bindresvport.c	2.2 88/07/29 4.0 RPCSRC";*/
+/*from: OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp */
+static char *rcsid = "$Id$";
+#endif
+
+/*
+ * Copyright (c) 1987 by Sun Microsystems, Inc.
+ *
+ * Portions Copyright(C) 1996, Jason Downs.  All rights reserved.
+ */
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <unistd.h>
+#include <string.h>
+
+/*
+ * Bind a socket to a privileged IP port
+ */
+int
+bindresvport(sd, sin)
+	int sd;
+	struct sockaddr_in *sin;
+{
+	int on, old, error;
+	struct sockaddr_in myaddr;
+	int sinlen = sizeof(struct sockaddr_in);
+
+	if (sin == (struct sockaddr_in *)0) {
+		sin = &myaddr;
+		memset(sin, 0, sinlen);
+		sin->sin_len = sinlen;
+		sin->sin_family = AF_INET;
+	} else if (sin->sin_family != AF_INET) {
+		errno = EPFNOSUPPORT;
+		return (-1);
+	}
+
+	if (sin->sin_port == 0) {
+		int oldlen = sizeof(old);
+		error = getsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
+				   &old, &oldlen);
+		if (error < 0)
+			return(error);
+
+		on = IP_PORTRANGE_LOW;
+		error = setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
+		           	   &on, sizeof(on));
+		if (error < 0)
+			return(error);
+	}
+
+	error = bind(sd, (struct sockaddr *)sin, sinlen);
+
+	if (sin->sin_port == 0) {
+		int saved_errno = errno;
+
+		if (error) {
+			if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
+			    &old, sizeof(old)) < 0)
+				errno = saved_errno;
+			return (error);
+		}
+
+		if (sin != &myaddr) {
+			/* Hmm, what did the kernel assign... */
+			if (getsockname(sd, (struct sockaddr *)sin,
+			    &sinlen) < 0)
+				errno = saved_errno;
+			return (error);
+		}
+	}
+	return (error);
+}