d4af9e693f
I have worked hard to reduce diffs against the vendor branch. One notable change in that respect is that we no longer prefer DSA over RSA - the reasons for doing so went away years ago. This may cause some surprises, as ssh will warn about unknown host keys even for hosts whose keys haven't changed. MFC after: 6 weeks
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/* $OpenBSD: rresvport.c,v 1.9 2005/11/10 10:00:17 espie Exp $ */
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/*
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* Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved.
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* Copyright (c) 1983, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */
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#include "includes.h"
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#ifndef HAVE_RRESVPORT_AF
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#if 0
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int
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rresvport(int *alport)
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{
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return rresvport_af(alport, AF_INET);
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}
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#endif
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int
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rresvport_af(int *alport, sa_family_t af)
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{
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struct sockaddr_storage ss;
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struct sockaddr *sa;
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u_int16_t *portp;
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int s;
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socklen_t salen;
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memset(&ss, '\0', sizeof ss);
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sa = (struct sockaddr *)&ss;
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switch (af) {
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case AF_INET:
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salen = sizeof(struct sockaddr_in);
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portp = &((struct sockaddr_in *)sa)->sin_port;
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break;
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case AF_INET6:
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salen = sizeof(struct sockaddr_in6);
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portp = &((struct sockaddr_in6 *)sa)->sin6_port;
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break;
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default:
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errno = EPFNOSUPPORT;
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return (-1);
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}
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sa->sa_family = af;
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s = socket(af, SOCK_STREAM, 0);
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if (s < 0)
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return (-1);
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*portp = htons(*alport);
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if (*alport < IPPORT_RESERVED - 1) {
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if (bind(s, sa, salen) >= 0)
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return (s);
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if (errno != EADDRINUSE) {
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(void)close(s);
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return (-1);
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}
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}
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*portp = 0;
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sa->sa_family = af;
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if (bindresvport_sa(s, sa) == -1) {
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(void)close(s);
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return (-1);
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}
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*alport = ntohs(*portp);
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return (s);
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}
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#endif /* HAVE_RRESVPORT_AF */
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