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 49 struct addrinfo; 50 struct hostent; 51 52 #ifdef WITH_CASPER 53 __BEGIN_DECLS 54 55 struct hostent *cap_gethostbyname(cap_channel_t *chan, const char *name); 56 struct hostent *cap_gethostbyname2(cap_channel_t *chan, const char *name, 57 int type); 58 struct hostent *cap_gethostbyaddr(cap_channel_t *chan, const void *addr, 59 socklen_t len, int type); 60 61 int cap_getaddrinfo(cap_channel_t *chan, const char *hostname, 62 const char *servname, const struct addrinfo *hints, struct addrinfo **res); 63 int 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 67 int cap_dns_type_limit(cap_channel_t *chan, const char * const *types, 68 size_t ntypes); 69 int cap_dns_family_limit(cap_channel_t *chan, const int *families, 70 size_t nfamilies); 71 72 __END_DECLS 73 #else 74 75 static inline struct hostent * 76 cap_gethostbyname(cap_channel_t *chan __unused, const char *name) 77 { 78 79 return (gethostbyname(name)); 80 } 81 82 static inline struct hostent * 83 cap_gethostbyname2(cap_channel_t *chan __unused, const char *name, int type) 84 { 85 86 return (gethostbyname2(name, type)); 87 } 88 89 static inline struct hostent * 90 cap_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 97 static 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 } 104 105 static 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 } 112 113 static inline int 114 cap_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 } 121 122 static inline int 123 cap_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