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Commit | Line | Data |
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d7d5f0b2 | 1 | /* This file has be modified from the original OpenBSD source */ |
2 | ||
48e671d5 | 3 | /* |
4 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
5 | * unrestricted use provided that this legend is included on all tape | |
6 | * media and as a part of the software program in whole or part. Users | |
7 | * may copy or modify Sun RPC without charge, but are not authorized | |
8 | * to license or distribute it to anyone else except as part of a product or | |
9 | * program developed by the user. | |
10 | * | |
11 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
12 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
13 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
14 | * | |
15 | * Sun RPC is provided with no support and without any obligation on the | |
16 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
17 | * modification or enhancement. | |
18 | * | |
19 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
20 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
21 | * OR ANY PART THEREOF. | |
22 | * | |
23 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
24 | * or profits or other special, indirect and consequential damages, even if | |
25 | * Sun has been advised of the possibility of such damages. | |
26 | * | |
27 | * Sun Microsystems, Inc. | |
28 | * 2550 Garcia Avenue | |
29 | * Mountain View, California 94043 | |
30 | */ | |
31 | ||
32 | #include "config.h" | |
33 | ||
d7d5f0b2 | 34 | #ifndef HAVE_BINDRESVPORT_SA |
48e671d5 | 35 | |
36 | #if defined(LIBC_SCCS) && !defined(lint) | |
d7d5f0b2 | 37 | static char *rcsid = "$OpenBSD: bindresvport.c,v 1.13 2000/01/26 03:43:21 deraadt Exp $"; |
48e671d5 | 38 | #endif /* LIBC_SCCS and not lint */ |
39 | ||
40 | /* | |
41 | * Copyright (c) 1987 by Sun Microsystems, Inc. | |
42 | * | |
43 | * Portions Copyright(C) 1996, Jason Downs. All rights reserved. | |
44 | */ | |
45 | ||
46 | #include "includes.h" | |
47 | ||
48 | #define STARTPORT 600 | |
49 | #define ENDPORT (IPPORT_RESERVED - 1) | |
50 | #define NPORTS (ENDPORT - STARTPORT + 1) | |
51 | ||
48e671d5 | 52 | /* |
53 | * Bind a socket to a privileged IP port | |
54 | */ | |
55 | int | |
d7d5f0b2 | 56 | bindresvport_sa(sd, sa) |
48e671d5 | 57 | int sd; |
58 | struct sockaddr *sa; | |
48e671d5 | 59 | { |
d7d5f0b2 | 60 | int error, af; |
48e671d5 | 61 | struct sockaddr_storage myaddr; |
62 | struct sockaddr_in *sin; | |
63 | struct sockaddr_in6 *sin6; | |
64 | u_int16_t *portp; | |
1e64903d | 65 | u_int16_t port; |
f1c4659d | 66 | socklen_t salen; |
48e671d5 | 67 | int i; |
68 | ||
69 | if (sa == NULL) { | |
70 | memset(&myaddr, 0, sizeof(myaddr)); | |
71 | sa = (struct sockaddr *)&myaddr; | |
d7d5f0b2 | 72 | |
73 | if (getsockname(sd, sa, &salen) == -1) | |
74 | return -1; /* errno is correctly set */ | |
75 | ||
76 | af = sa->sa_family; | |
77 | memset(&myaddr, 0, salen); | |
78 | } else | |
79 | af = sa->sa_family; | |
48e671d5 | 80 | |
81 | if (af == AF_INET) { | |
82 | sin = (struct sockaddr_in *)sa; | |
83 | salen = sizeof(struct sockaddr_in); | |
84 | portp = &sin->sin_port; | |
85 | } else if (af == AF_INET6) { | |
86 | sin6 = (struct sockaddr_in6 *)sa; | |
87 | salen = sizeof(struct sockaddr_in6); | |
88 | portp = &sin6->sin6_port; | |
89 | } else { | |
90 | errno = EPFNOSUPPORT; | |
91 | return (-1); | |
92 | } | |
93 | sa->sa_family = af; | |
94 | ||
1e64903d | 95 | port = ntohs(*portp); |
96 | if (port == 0) | |
97 | port = (arc4random() % NPORTS) + STARTPORT; | |
48e671d5 | 98 | |
717057b6 | 99 | /* Avoid warning */ |
100 | error = -1; | |
101 | ||
48e671d5 | 102 | for(i = 0; i < NPORTS; i++) { |
1e64903d | 103 | *portp = htons(port); |
104 | ||
48e671d5 | 105 | error = bind(sd, sa, salen); |
d7d5f0b2 | 106 | |
f914c7fb | 107 | /* Terminate on success */ |
108 | if (error == 0) | |
109 | break; | |
110 | ||
111 | /* Terminate on errors, except "address already in use" */ | |
f4a7cf29 | 112 | if ((error < 0) && !((errno == EADDRINUSE) || (errno == EINVAL))) |
48e671d5 | 113 | break; |
114 | ||
1e64903d | 115 | port++; |
116 | if (port > ENDPORT) | |
117 | port = STARTPORT; | |
48e671d5 | 118 | } |
119 | ||
120 | return (error); | |
121 | } | |
122 | ||
d7d5f0b2 | 123 | #endif /* HAVE_BINDRESVPORT_SA */ |