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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sunrpc/bindrsvprt.c
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initial import
Diffstat (limited to 'sunrpc/bindrsvprt.c')
-rw-r--r--sunrpc/bindrsvprt.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/sunrpc/bindrsvprt.c b/sunrpc/bindrsvprt.c
new file mode 100644
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+++ b/sunrpc/bindrsvprt.c
@@ -0,0 +1,78 @@
+static char sccsid[] = "@(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC 1.8 88/02/08 SMI";
+/*
+ * 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
+ */
+
+/*
+ * Copyright (c) 1987 by Sun Microsystems, Inc.
+ */
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+/*
+ * Bind a socket to a privileged IP port
+ */
+bindresvport(sd, sin)
+ int sd;
+ struct sockaddr_in *sin;
+{
+ int res;
+ static short port;
+ struct sockaddr_in myaddr;
+ extern int errno;
+ int i;
+
+#define STARTPORT 600
+#define ENDPORT (IPPORT_RESERVED - 1)
+#define NPORTS (ENDPORT - STARTPORT + 1)
+
+ if (sin == (struct sockaddr_in *)0) {
+ sin = &myaddr;
+ bzero(sin, sizeof (*sin));
+ sin->sin_family = AF_INET;
+ } else if (sin->sin_family != AF_INET) {
+ errno = EPFNOSUPPORT;
+ return (-1);
+ }
+ if (port == 0) {
+ port = (getpid() % NPORTS) + STARTPORT;
+ }
+ res = -1;
+ errno = EADDRINUSE;
+ for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) {
+ sin->sin_port = htons(port++);
+ if (port > ENDPORT) {
+ port = STARTPORT;
+ }
+ res = bind(sd, sin, sizeof(struct sockaddr_in));
+ }
+ return (res);
+}