1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 23*0Sstevel@tonic-gate 24*0Sstevel@tonic-gate /* 25*0Sstevel@tonic-gate * Copyright 1987 Sun Microsystems, Inc. All rights reserved. 26*0Sstevel@tonic-gate * Use is subject to license terms. 27*0Sstevel@tonic-gate */ 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <sys/types.h> 30*0Sstevel@tonic-gate #include <sys/errno.h> 31*0Sstevel@tonic-gate #include <sys/socket.h> 32*0Sstevel@tonic-gate #include <netinet/in.h> 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate /* 35*0Sstevel@tonic-gate * Bind a socket to a privileged IP port 36*0Sstevel@tonic-gate */ 37*0Sstevel@tonic-gate bindresvport(sd, sin) 38*0Sstevel@tonic-gate int sd; 39*0Sstevel@tonic-gate struct sockaddr_in *sin; 40*0Sstevel@tonic-gate { 41*0Sstevel@tonic-gate int res; 42*0Sstevel@tonic-gate static short port; 43*0Sstevel@tonic-gate struct sockaddr_in myaddr; 44*0Sstevel@tonic-gate extern int errno; 45*0Sstevel@tonic-gate int i; 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate #define STARTPORT 600 48*0Sstevel@tonic-gate #define ENDPORT (IPPORT_RESERVED - 1) 49*0Sstevel@tonic-gate #define NPORTS (ENDPORT - STARTPORT + 1) 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate if (sin == (struct sockaddr_in *)0) { 52*0Sstevel@tonic-gate sin = &myaddr; 53*0Sstevel@tonic-gate bzero(sin, sizeof (*sin)); 54*0Sstevel@tonic-gate sin->sin_family = AF_INET; 55*0Sstevel@tonic-gate } else if (sin->sin_family != AF_INET) { 56*0Sstevel@tonic-gate errno = EPFNOSUPPORT; 57*0Sstevel@tonic-gate return (-1); 58*0Sstevel@tonic-gate } 59*0Sstevel@tonic-gate if (port == 0) { 60*0Sstevel@tonic-gate port = (getpid() % NPORTS) + STARTPORT; 61*0Sstevel@tonic-gate } 62*0Sstevel@tonic-gate res = -1; 63*0Sstevel@tonic-gate errno = EADDRINUSE; 64*0Sstevel@tonic-gate for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) { 65*0Sstevel@tonic-gate sin->sin_port = htons(port++); 66*0Sstevel@tonic-gate if (port > ENDPORT) { 67*0Sstevel@tonic-gate port = STARTPORT; 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate res = bind(sd, sin, sizeof(struct sockaddr_in)); 70*0Sstevel@tonic-gate } 71*0Sstevel@tonic-gate return (res); 72*0Sstevel@tonic-gate } 73