1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2020 Mariusz Zaborski <oshogbo@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef _CAP_NETWORK_H_ 29 #define _CAP_NETWORK_H_ 30 31 #ifdef HAVE_CASPER 32 #define WITH_CASPER 33 #endif 34 35 #include <sys/dnv.h> 36 #include <sys/nv.h> 37 38 #include <sys/socket.h> 39 40 struct addrinfo; 41 struct hostent; 42 43 struct cap_net_limit; 44 typedef struct cap_net_limit cap_net_limit_t; 45 46 #define CAPNET_ADDR2NAME (0x01) 47 #define CAPNET_NAME2ADDR (0x02) 48 #define CAPNET_DEPRECATED_ADDR2NAME (0x04) 49 #define CAPNET_DEPRECATED_NAME2ADDR (0x08) 50 #define CAPNET_CONNECT (0x10) 51 #define CAPNET_BIND (0x20) 52 #define CAPNET_CONNECTDNS (0x40) 53 54 #ifdef WITH_CASPER 55 /* Capability functions. */ 56 int cap_bind(cap_channel_t *chan, int s, const struct sockaddr *addr, 57 socklen_t addrlen); 58 int cap_connect(cap_channel_t *chan, int s, const struct sockaddr *name, 59 socklen_t namelen); 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 /* Limit functions. */ 68 cap_net_limit_t *cap_net_limit_init(cap_channel_t *chan, uint64_t mode); 69 int cap_net_limit(cap_net_limit_t *limit); 70 void cap_net_free(cap_net_limit_t *limit); 71 72 cap_net_limit_t *cap_net_limit_addr2name_family(cap_net_limit_t *limit, 73 int *family, size_t size); 74 cap_net_limit_t *cap_net_limit_addr2name(cap_net_limit_t *limit, 75 const struct sockaddr *sa, socklen_t salen); 76 77 cap_net_limit_t *cap_net_limit_name2addr_family(cap_net_limit_t *limit, 78 int *family, size_t size); 79 cap_net_limit_t *cap_net_limit_name2addr(cap_net_limit_t *limit, 80 const char *name, const char *serv); 81 82 cap_net_limit_t *cap_net_limit_connect(cap_net_limit_t *limit, 83 const struct sockaddr *sa, socklen_t salen); 84 85 cap_net_limit_t *cap_net_limit_bind(cap_net_limit_t *limit, 86 const struct sockaddr *sa, socklen_t salen); 87 88 /* Deprecated functions. */ 89 struct hostent *cap_gethostbyname(cap_channel_t *chan, const char *name); 90 struct hostent *cap_gethostbyname2(cap_channel_t *chan, const char *name, 91 int af); 92 struct hostent *cap_gethostbyaddr(cap_channel_t *chan, const void *addr, 93 socklen_t len, int af); 94 #else 95 /* Capability functions. */ 96 #define cap_bind(chan, s, addr, addrlen) \ 97 bind(s, addr, addrlen) 98 #define cap_connect(chan, s, name, namelen) \ 99 connect(s, name, namelen) 100 #define cap_getaddrinfo(chan, hostname, servname, hints, res) \ 101 getaddrinfo(hostname, servname, hints, res) 102 #define cap_getnameinfo(chan, sa, salen, host, hostlen, serv, servlen, flags) \ 103 getnameinfo(sa, salen, host, hostlen, serv, servlen, flags) 104 105 /* Limit functions. */ 106 #define cap_net_limit_init(chan, mode) ((cap_net_limit_t *)malloc(8)) 107 #define cap_net_free(limit) free(limit) 108 static inline int 109 cap_net_limit(cap_net_limit_t *limit) 110 { 111 free(limit); 112 return (0); 113 } 114 115 static inline cap_net_limit_t * 116 cap_net_limit_addr2name_family(cap_net_limit_t *limit, 117 int *family __unused, size_t size __unused) 118 { 119 return (limit); 120 } 121 122 static inline cap_net_limit_t * 123 cap_net_limit_addr2name(cap_net_limit_t *limit, 124 const struct sockaddr *sa __unused, socklen_t salen __unused) 125 { 126 return (limit); 127 } 128 129 static inline cap_net_limit_t * 130 cap_net_limit_name2addr_family(cap_net_limit_t *limit, 131 int *family __unused, size_t size __unused) 132 { 133 return (limit); 134 } 135 136 static inline cap_net_limit_t * 137 cap_net_limit_name2addr(cap_net_limit_t *limit, 138 const char *name __unused, const char *serv __unused) 139 { 140 return (limit); 141 } 142 143 static inline cap_net_limit_t * 144 cap_net_limit_connect(cap_net_limit_t *limit, 145 const struct sockaddr *sa __unused, socklen_t salen __unused) 146 { 147 return (limit); 148 } 149 150 static inline cap_net_limit_t * 151 cap_net_limit_bind(cap_net_limit_t *limit, 152 const struct sockaddr *sa __unused, socklen_t salen __unused) 153 { 154 return (limit); 155 } 156 157 /* Deprecated functions. */ 158 #define cap_gethostbyname(chan, name) gethostbyname(name) 159 #define cap_gethostbyname2(chan, name, type) gethostbyname2(name, type) 160 #define cap_gethostbyaddr(chan, addr, len, type) gethostbyaddr(addr, len, type) 161 #endif 162 163 #endif /* !_CAP_NETWORK_H_ */ 164