1/*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef	_CAP_DNS_H_
31#define	_CAP_DNS_H_
32
33#ifdef HAVE_CASPER
34#define WITH_CASPER
35#endif
36
37#include <sys/cdefs.h>
38#include <sys/socket.h>	/* socklen_t */
39
40/*
41 * Pull these in if we're just inlining calls to the underlying
42 * libc functions.
43 */
44#ifndef	WITH_CASPER
45#include <sys/types.h>
46#include <netdb.h>
47#endif	/* WITH_CASPER */
48
49struct addrinfo;
50struct hostent;
51
52#ifdef WITH_CASPER
53__BEGIN_DECLS
54
55struct hostent *cap_gethostbyname(cap_channel_t *chan, const char *name);
56struct hostent *cap_gethostbyname2(cap_channel_t *chan, const char *name,
57    int type);
58struct hostent *cap_gethostbyaddr(cap_channel_t *chan, const void *addr,
59    socklen_t len, int type);
60
61int cap_getaddrinfo(cap_channel_t *chan, const char *hostname,
62    const char *servname, const struct addrinfo *hints, struct addrinfo **res);
63int cap_getnameinfo(cap_channel_t *chan, const struct sockaddr *sa,
64    socklen_t salen, char *host, size_t hostlen, char *serv, size_t servlen,
65    int flags);
66
67int cap_dns_type_limit(cap_channel_t *chan, const char * const *types,
68    size_t ntypes);
69int cap_dns_family_limit(cap_channel_t *chan, const int *families,
70    size_t nfamilies);
71
72__END_DECLS
73#else
74
75static inline struct hostent *
76cap_gethostbyname(cap_channel_t *chan __unused, const char *name)
77{
78
79	return (gethostbyname(name));
80}
81
82static inline struct hostent *
83cap_gethostbyname2(cap_channel_t *chan __unused, const char *name, int type)
84{
85
86	return (gethostbyname2(name, type));
87}
88
89static inline struct hostent *
90cap_gethostbyaddr(cap_channel_t *chan __unused, const void *addr,
91    socklen_t len, int type)
92{
93
94	return (gethostbyaddr(addr, len, type));
95}
96
97static inline int cap_getaddrinfo(cap_channel_t *chan __unused,
98    const char *hostname, const char *servname, const struct addrinfo *hints,
99    struct addrinfo **res)
100{
101
102	return (getaddrinfo(hostname, servname, hints, res));
103}
104
105static inline int cap_getnameinfo(cap_channel_t *chan __unused,
106    const struct sockaddr *sa, socklen_t salen, char *host, size_t hostlen,
107    char *serv, size_t servlen, int flags)
108{
109
110	return (getnameinfo(sa, salen, host, hostlen, serv, servlen, flags));
111}
112
113static inline int
114cap_dns_type_limit(cap_channel_t *chan __unused,
115    const char * const *types __unused,
116    size_t ntypes __unused)
117{
118
119	return (0);
120}
121
122static inline int
123cap_dns_family_limit(cap_channel_t *chan __unused,
124    const int *families __unused,
125    size_t nfamilies __unused)
126{
127
128	return (0);
129}
130#endif	/* WITH_CASPER */
131
132#endif	/* !_CAP_DNS_H_ */
133