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48e671d5 | 1 | /* |
2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
3 | * unrestricted use provided that this legend is included on all tape | |
4 | * media and as a part of the software program in whole or part. Users | |
5 | * may copy or modify Sun RPC without charge, but are not authorized | |
6 | * to license or distribute it to anyone else except as part of a product or | |
7 | * program developed by the user. | |
8 | * | |
9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
12 | * | |
13 | * Sun RPC is provided with no support and without any obligation on the | |
14 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
15 | * modification or enhancement. | |
16 | * | |
17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
19 | * OR ANY PART THEREOF. | |
20 | * | |
21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
22 | * or profits or other special, indirect and consequential damages, even if | |
23 | * Sun has been advised of the possibility of such damages. | |
24 | * | |
25 | * Sun Microsystems, Inc. | |
26 | * 2550 Garcia Avenue | |
27 | * Mountain View, California 94043 | |
28 | */ | |
29 | ||
30 | #include "config.h" | |
31 | ||
bcf89935 | 32 | #ifndef HAVE_BINDRESVPORT_AF |
48e671d5 | 33 | |
34 | #if defined(LIBC_SCCS) && !defined(lint) | |
35 | static char *rcsid = "$OpenBSD: bindresvport.c,v 1.11 1999/12/17 19:22:08 deraadt Exp $"; | |
36 | #endif /* LIBC_SCCS and not lint */ | |
37 | ||
38 | /* | |
39 | * Copyright (c) 1987 by Sun Microsystems, Inc. | |
40 | * | |
41 | * Portions Copyright(C) 1996, Jason Downs. All rights reserved. | |
42 | */ | |
43 | ||
44 | #include "includes.h" | |
45 | ||
46 | #define STARTPORT 600 | |
47 | #define ENDPORT (IPPORT_RESERVED - 1) | |
48 | #define NPORTS (ENDPORT - STARTPORT + 1) | |
49 | ||
48e671d5 | 50 | /* |
51 | * Bind a socket to a privileged IP port | |
52 | */ | |
53 | int | |
54 | bindresvport_af(sd, sa, af) | |
55 | int sd; | |
56 | struct sockaddr *sa; | |
57 | int af; | |
58 | { | |
59 | int error; | |
60 | struct sockaddr_storage myaddr; | |
61 | struct sockaddr_in *sin; | |
62 | struct sockaddr_in6 *sin6; | |
63 | u_int16_t *portp; | |
1e64903d | 64 | u_int16_t port; |
f1c4659d | 65 | socklen_t salen; |
48e671d5 | 66 | int i; |
67 | ||
68 | if (sa == NULL) { | |
69 | memset(&myaddr, 0, sizeof(myaddr)); | |
70 | sa = (struct sockaddr *)&myaddr; | |
71 | } | |
72 | ||
73 | if (af == AF_INET) { | |
74 | sin = (struct sockaddr_in *)sa; | |
75 | salen = sizeof(struct sockaddr_in); | |
76 | portp = &sin->sin_port; | |
77 | } else if (af == AF_INET6) { | |
78 | sin6 = (struct sockaddr_in6 *)sa; | |
79 | salen = sizeof(struct sockaddr_in6); | |
80 | portp = &sin6->sin6_port; | |
81 | } else { | |
82 | errno = EPFNOSUPPORT; | |
83 | return (-1); | |
84 | } | |
85 | sa->sa_family = af; | |
86 | ||
1e64903d | 87 | port = ntohs(*portp); |
88 | if (port == 0) | |
89 | port = (arc4random() % NPORTS) + STARTPORT; | |
48e671d5 | 90 | |
717057b6 | 91 | /* Avoid warning */ |
92 | error = -1; | |
93 | ||
48e671d5 | 94 | for(i = 0; i < NPORTS; i++) { |
1e64903d | 95 | *portp = htons(port); |
96 | ||
48e671d5 | 97 | error = bind(sd, sa, salen); |
f4a7cf29 | 98 | |
f914c7fb | 99 | /* Terminate on success */ |
100 | if (error == 0) | |
101 | break; | |
102 | ||
103 | /* Terminate on errors, except "address already in use" */ | |
f4a7cf29 | 104 | if ((error < 0) && !((errno == EADDRINUSE) || (errno == EINVAL))) |
48e671d5 | 105 | break; |
106 | ||
1e64903d | 107 | port++; |
108 | if (port > ENDPORT) | |
109 | port = STARTPORT; | |
48e671d5 | 110 | } |
111 | ||
112 | return (error); | |
113 | } | |
114 | ||
bcf89935 | 115 | #endif /* HAVE_BINDRESVPORT_AF */ |