17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate /* 237c478bd9Sstevel@tonic-gate * Copyright 1987 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 27*5d54f3d8Smuffin #pragma ident "%Z%%M% %I% %E% SMI" 28*5d54f3d8Smuffin 297c478bd9Sstevel@tonic-gate #include <sys/types.h> 30*5d54f3d8Smuffin #include <errno.h> 317c478bd9Sstevel@tonic-gate #include <sys/socket.h> 327c478bd9Sstevel@tonic-gate #include <netinet/in.h> 337c478bd9Sstevel@tonic-gate 347c478bd9Sstevel@tonic-gate /* 357c478bd9Sstevel@tonic-gate * Bind a socket to a privileged IP port 367c478bd9Sstevel@tonic-gate */ 37*5d54f3d8Smuffin int 38*5d54f3d8Smuffin bindresvport(int sd, struct sockaddr_in *sin) 397c478bd9Sstevel@tonic-gate { 407c478bd9Sstevel@tonic-gate int res; 417c478bd9Sstevel@tonic-gate static short port; 427c478bd9Sstevel@tonic-gate struct sockaddr_in myaddr; 437c478bd9Sstevel@tonic-gate int i; 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate #define STARTPORT 600 467c478bd9Sstevel@tonic-gate #define ENDPORT (IPPORT_RESERVED - 1) 477c478bd9Sstevel@tonic-gate #define NPORTS (ENDPORT - STARTPORT + 1) 487c478bd9Sstevel@tonic-gate 497c478bd9Sstevel@tonic-gate if (sin == (struct sockaddr_in *)0) { 507c478bd9Sstevel@tonic-gate sin = &myaddr; 517c478bd9Sstevel@tonic-gate bzero(sin, sizeof (*sin)); 527c478bd9Sstevel@tonic-gate sin->sin_family = AF_INET; 537c478bd9Sstevel@tonic-gate } else if (sin->sin_family != AF_INET) { 547c478bd9Sstevel@tonic-gate errno = EPFNOSUPPORT; 557c478bd9Sstevel@tonic-gate return (-1); 567c478bd9Sstevel@tonic-gate } 577c478bd9Sstevel@tonic-gate if (port == 0) { 587c478bd9Sstevel@tonic-gate port = (getpid() % NPORTS) + STARTPORT; 597c478bd9Sstevel@tonic-gate } 607c478bd9Sstevel@tonic-gate res = -1; 617c478bd9Sstevel@tonic-gate errno = EADDRINUSE; 627c478bd9Sstevel@tonic-gate for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) { 637c478bd9Sstevel@tonic-gate sin->sin_port = htons(port++); 647c478bd9Sstevel@tonic-gate if (port > ENDPORT) { 657c478bd9Sstevel@tonic-gate port = STARTPORT; 667c478bd9Sstevel@tonic-gate } 677c478bd9Sstevel@tonic-gate res = bind(sd, sin, sizeof(struct sockaddr_in)); 687c478bd9Sstevel@tonic-gate } 697c478bd9Sstevel@tonic-gate return (res); 707c478bd9Sstevel@tonic-gate } 71