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 * $FreeBSD$ 30 */ 31 32 #ifndef _CAP_DNS_H_ 33 #define _CAP_DNS_H_ 34 35 #ifdef HAVE_CASPER 36 #define WITH_CASPER 37 #endif 38 39 #include <sys/cdefs.h> 40 #include <sys/socket.h> /* socklen_t */ 41 42 /* 43 * Pull these in if we're just inlining calls to the underlying 44 * libc functions. 45 */ 46 #ifndef WITH_CASPER 47 #include <sys/types.h> 48 #include <netdb.h> 49 #endif /* WITH_CASPER */ 50 51 struct addrinfo; 52 struct hostent; 53 54 #ifdef WITH_CASPER 55 __BEGIN_DECLS 56 57 struct hostent *cap_gethostbyname(cap_channel_t *chan, const char *name); 58 struct hostent *cap_gethostbyname2(cap_channel_t *chan, const char *name, 59 int type); 60 struct hostent *cap_gethostbyaddr(cap_channel_t *chan, const void *addr, 61 socklen_t len, int type); 62 63 int cap_getaddrinfo(cap_channel_t *chan, const char *hostname, 64 const char *servname, const struct addrinfo *hints, struct addrinfo **res); 65 int cap_getnameinfo(cap_channel_t *chan, const struct sockaddr *sa, 66 socklen_t salen, char *host, size_t hostlen, char *serv, size_t servlen, 67 int flags); 68 69 int cap_dns_type_limit(cap_channel_t *chan, const char * const *types, 70 size_t ntypes); 71 int cap_dns_family_limit(cap_channel_t *chan, const int *families, 72 size_t nfamilies); 73 74 __END_DECLS 75 #else 76 77 static inline struct hostent * 78 cap_gethostbyname(cap_channel_t *chan __unused, const char *name) 79 { 80 81 return (gethostbyname(name)); 82 } 83 84 static inline struct hostent * 85 cap_gethostbyname2(cap_channel_t *chan __unused, const char *name, int type) 86 { 87 88 return (gethostbyname2(name, type)); 89 } 90 91 static inline struct hostent * 92 cap_gethostbyaddr(cap_channel_t *chan __unused, const void *addr, 93 socklen_t len, int type) 94 { 95 96 return (gethostbyaddr(addr, len, type)); 97 } 98 99 static inline int cap_getaddrinfo(cap_channel_t *chan __unused, 100 const char *hostname, const char *servname, const struct addrinfo *hints, 101 struct addrinfo **res) 102 { 103 104 return (getaddrinfo(hostname, servname, hints, res)); 105 } 106 107 static inline int cap_getnameinfo(cap_channel_t *chan __unused, 108 const struct sockaddr *sa, socklen_t salen, char *host, size_t hostlen, 109 char *serv, size_t servlen, int flags) 110 { 111 112 return (getnameinfo(sa, salen, host, hostlen, serv, servlen, flags)); 113 } 114 115 static inline int 116 cap_dns_type_limit(cap_channel_t *chan __unused, 117 const char * const *types __unused, 118 size_t ntypes __unused) 119 { 120 121 return (0); 122 } 123 124 static inline int 125 cap_dns_family_limit(cap_channel_t *chan __unused, 126 const int *families __unused, 127 size_t nfamilies __unused) 128 { 129 130 return (0); 131 } 132 #endif /* WITH_CASPER */ 133 134 #endif /* !_CAP_DNS_H_ */ 135