| /* $OpenBSD: rresvport.c,v 1.9 2005/11/10 10:00:17 espie Exp $ */ |
| /* |
| * Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved. |
| * Copyright (c) 1983, 1993, 1994 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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. |
| */ |
| |
| /* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */ |
| |
| #include "includes.h" |
| |
| #ifndef HAVE_RRESVPORT_AF |
| |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #if 0 |
| int |
| rresvport(int *alport) |
| { |
| return rresvport_af(alport, AF_INET); |
| } |
| #endif |
| |
| int |
| rresvport_af(int *alport, sa_family_t af) |
| { |
| struct sockaddr_storage ss; |
| struct sockaddr *sa; |
| u_int16_t *portp; |
| int s; |
| socklen_t salen; |
| |
| memset(&ss, '\0', sizeof ss); |
| sa = (struct sockaddr *)&ss; |
| |
| switch (af) { |
| case AF_INET: |
| salen = sizeof(struct sockaddr_in); |
| portp = &((struct sockaddr_in *)sa)->sin_port; |
| break; |
| case AF_INET6: |
| salen = sizeof(struct sockaddr_in6); |
| portp = &((struct sockaddr_in6 *)sa)->sin6_port; |
| break; |
| default: |
| errno = EPFNOSUPPORT; |
| return (-1); |
| } |
| sa->sa_family = af; |
| |
| s = socket(af, SOCK_STREAM, 0); |
| if (s < 0) |
| return (-1); |
| |
| *portp = htons(*alport); |
| if (*alport < IPPORT_RESERVED - 1) { |
| if (bind(s, sa, salen) >= 0) |
| return (s); |
| if (errno != EADDRINUSE) { |
| (void)close(s); |
| return (-1); |
| } |
| } |
| |
| *portp = 0; |
| sa->sa_family = af; |
| if (bindresvport_sa(s, sa) == -1) { |
| (void)close(s); |
| return (-1); |
| } |
| *alport = ntohs(*portp); |
| return (s); |
| } |
| |
| #endif /* HAVE_RRESVPORT_AF */ |