1 /* 2 * Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved. 3 * Copyright (c) 1983, 1993, 1994 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * This product includes software developed by Theo de Raadt. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "includes.h" 37 38 #ifndef HAVE_RRESVPORT_AF 39 40 #if defined(LIBC_SCCS) && !defined(lint) 41 static char *rcsid = "$OpenBSD: rresvport.c,v 1.5 2000/01/26 03:43:20 deraadt Exp $"; 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include "includes.h" 45 46 #if 0 47 int 48 rresvport(alport) 49 int *alport; 50 { 51 return rresvport_af(alport, AF_INET); 52 } 53 #endif 54 55 int 56 rresvport_af(int *alport, sa_family_t af) 57 { 58 struct sockaddr_storage ss; 59 struct sockaddr *sa; 60 u_int16_t *portp; 61 int s; 62 socklen_t salen; 63 64 memset(&ss, '\0', sizeof ss); 65 sa = (struct sockaddr *)&ss; 66 67 switch (af) { 68 case AF_INET: 69 salen = sizeof(struct sockaddr_in); 70 portp = &((struct sockaddr_in *)sa)->sin_port; 71 break; 72 case AF_INET6: 73 salen = sizeof(struct sockaddr_in6); 74 portp = &((struct sockaddr_in6 *)sa)->sin6_port; 75 break; 76 default: 77 errno = EPFNOSUPPORT; 78 return (-1); 79 } 80 sa->sa_family = af; 81 82 s = socket(af, SOCK_STREAM, 0); 83 if (s < 0) 84 return (-1); 85 86 *portp = htons(*alport); 87 if (*alport < IPPORT_RESERVED - 1) { 88 if (bind(s, sa, salen) >= 0) 89 return (s); 90 if (errno != EADDRINUSE) { 91 (void)close(s); 92 return (-1); 93 } 94 } 95 96 *portp = 0; 97 sa->sa_family = af; 98 if (bindresvport_sa(s, sa) == -1) { 99 (void)close(s); 100 return (-1); 101 } 102 *alport = ntohs(*portp); 103 return (s); 104 } 105 106 #endif /* HAVE_RRESVPORT_AF */ 107 108 #pragma ident "%Z%%M% %I% %E% SMI" 109