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3c0ef626 | 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. | |
0fff78ff | 14 | * 3. Neither the name of the University nor the names of its contributors |
3c0ef626 | 15 | * may be used to endorse or promote products derived from this software |
16 | * without specific prior written permission. | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
28 | * SUCH DAMAGE. | |
29 | */ | |
30 | ||
41b2f314 | 31 | #include "includes.h" |
3c0ef626 | 32 | |
33 | #ifndef HAVE_RRESVPORT_AF | |
34 | ||
35 | #if defined(LIBC_SCCS) && !defined(lint) | |
0fff78ff | 36 | static char *rcsid = "$OpenBSD: rresvport.c,v 1.6 2003/06/03 02:11:35 deraadt Exp $"; |
3c0ef626 | 37 | #endif /* LIBC_SCCS and not lint */ |
38 | ||
39 | #include "includes.h" | |
40 | ||
41 | #if 0 | |
42 | int | |
43 | rresvport(alport) | |
44 | int *alport; | |
45 | { | |
46 | return rresvport_af(alport, AF_INET); | |
47 | } | |
48 | #endif | |
49 | ||
50 | int | |
51 | rresvport_af(int *alport, sa_family_t af) | |
52 | { | |
53 | struct sockaddr_storage ss; | |
54 | struct sockaddr *sa; | |
55 | u_int16_t *portp; | |
56 | int s; | |
57 | socklen_t salen; | |
58 | ||
59 | memset(&ss, '\0', sizeof ss); | |
60 | sa = (struct sockaddr *)&ss; | |
61 | ||
62 | switch (af) { | |
63 | case AF_INET: | |
64 | salen = sizeof(struct sockaddr_in); | |
65 | portp = &((struct sockaddr_in *)sa)->sin_port; | |
66 | break; | |
67 | case AF_INET6: | |
68 | salen = sizeof(struct sockaddr_in6); | |
69 | portp = &((struct sockaddr_in6 *)sa)->sin6_port; | |
70 | break; | |
71 | default: | |
72 | errno = EPFNOSUPPORT; | |
73 | return (-1); | |
74 | } | |
75 | sa->sa_family = af; | |
76 | ||
77 | s = socket(af, SOCK_STREAM, 0); | |
78 | if (s < 0) | |
79 | return (-1); | |
80 | ||
81 | *portp = htons(*alport); | |
82 | if (*alport < IPPORT_RESERVED - 1) { | |
83 | if (bind(s, sa, salen) >= 0) | |
84 | return (s); | |
85 | if (errno != EADDRINUSE) { | |
86 | (void)close(s); | |
87 | return (-1); | |
88 | } | |
89 | } | |
90 | ||
91 | *portp = 0; | |
92 | sa->sa_family = af; | |
93 | if (bindresvport_sa(s, sa) == -1) { | |
94 | (void)close(s); | |
95 | return (-1); | |
96 | } | |
97 | *alport = ntohs(*portp); | |
98 | return (s); | |
99 | } | |
100 | ||
101 | #endif /* HAVE_RRESVPORT_AF */ |