1 files changed, 92 insertions, 0 deletions
diff --git a/src/lib/rpc/bindresvport.c b/src/lib/rpc/bindresvport.c
new file mode 100644
index 000000000000..a421dd8ec770
--- /dev/null
+++ b/src/lib/rpc/bindresvport.c
@@ -0,0 +1,92 @@
+/* lib/rpc/bindresvport.c */
+/*
+ * Copyright (c) 2010, Oracle America, Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *
+ *     * Neither the name of the "Oracle America, Inc." nor the names of
+ *       its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <gssrpc/rpc.h>
+#include <errno.h>
+#include "socket-utils.h"
+
+/*
+ * Bind a socket to a privileged IP port
+ */
+int
+bindresvport_sa(int sd, struct sockaddr *sa)
+{
+	int res;
+	static short port;
+	struct sockaddr_storage myaddr;
+	socklen_t salen;
+	int i;
+
+#define STARTPORT 600
+#define ENDPORT (IPPORT_RESERVED - 1)
+#define NPORTS	(ENDPORT - STARTPORT + 1)
+	if (sa == NULL) {
+		salen = sizeof(myaddr);
+		sa = ss2sa(&myaddr);
+		res = getsockname(sd, sa, &salen);
+		if (res < 0)
+			return (-1);
+	}
+	if (!sa_is_inet(sa)) {
+		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++) {
+		sa_setport(sa, port++);
+		if (port > ENDPORT) {
+			port = STARTPORT;
+		}
+		res = bind(sd, sa, sa_socklen(sa));
+	}
+	return (res);
+}
+
+int
+bindresvport(int sd, struct sockaddr_in *sockin)
+{
+	return (bindresvport_sa(sd, (struct sockaddr *)sockin));
+}