1/* 2 * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (C) 1999-2003 Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 15 * PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18/* $Id: net.h,v 1.31.2.2.10.8 2004/04/29 01:31:23 marka Exp $ */ 19 20#ifndef ISC_NET_H 21#define ISC_NET_H 1 22 23/***** 24 ***** Module Info 25 *****/ 26 27/* 28 * Basic Networking Types 29 * 30 * This module is responsible for defining the following basic networking 31 * types: 32 * 33 * struct in_addr 34 * struct in6_addr 35 * struct in6_pktinfo 36 * struct sockaddr 37 * struct sockaddr_in 38 * struct sockaddr_in6 39 * in_port_t 40 * 41 * It ensures that the AF_ and PF_ macros are defined. 42 * 43 * It declares ntoh[sl]() and hton[sl](). 44 * 45 * It declares inet_aton(), inet_ntop(), and inet_pton(). 46 * 47 * It ensures that INADDR_LOOPBACK, INADDR_ANY, IN6ADDR_ANY_INIT, 48 * in6addr_any, and in6addr_loopback are available. 49 * 50 * It ensures that IN_MULTICAST() is available to check for multicast 51 * addresses. 52 * 53 * MP: 54 * No impact. 55 * 56 * Reliability: 57 * No anticipated impact. 58 * 59 * Resources: 60 * N/A. 61 * 62 * Security: 63 * No anticipated impact. 64 * 65 * Standards: 66 * BSD Socket API 67 * RFC 2553 68 */ 69 70/*** 71 *** Imports. 72 ***/ 73#include <isc/platform.h> 74 75#include <sys/types.h> 76#include <sys/socket.h> /* Contractual promise. */ 77 78#include <net/if.h> 79 80#include <netinet/in.h> /* Contractual promise. */ 81#include <arpa/inet.h> /* Contractual promise. */ 82#ifdef ISC_PLATFORM_NEEDNETINETIN6H 83#include <netinet/in6.h> /* Required on UnixWare. */ 84#endif 85#ifdef ISC_PLATFORM_NEEDNETINET6IN6H 86#include <netinet6/in6.h> /* Required on BSD/OS for in6_pktinfo. */ 87#endif 88 89#ifndef ISC_PLATFORM_HAVEIPV6 90#include <isc/ipv6.h> /* Contractual promise. */ 91#endif 92 93#include <isc/lang.h> 94#include <isc/types.h> 95 96#ifdef ISC_PLATFORM_HAVEINADDR6 97#define in6_addr in_addr6 /* Required for pre RFC2133 implementations. */ 98#endif 99 100#ifdef ISC_PLATFORM_HAVEIPV6 101/* 102 * Required for some pre RFC2133 implementations. 103 * IN6ADDR_ANY_INIT and IN6ADDR_LOOPBACK_INIT were added in 104 * draft-ietf-ipngwg-bsd-api-04.txt or draft-ietf-ipngwg-bsd-api-05.txt. 105 * If 's6_addr' is defined then assume that there is a union and three 106 * levels otherwise assume two levels required. 107 */ 108#ifndef IN6ADDR_ANY_INIT 109#ifdef s6_addr 110#define IN6ADDR_ANY_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } } 111#else 112#define IN6ADDR_ANY_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } } 113#endif 114#endif 115 116#ifndef IN6ADDR_LOOPBACK_INIT 117#ifdef s6_addr 118#define IN6ADDR_LOOPBACK_INIT { { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } } 119#else 120#define IN6ADDR_LOOPBACK_INIT { { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1 } } 121#endif 122#endif 123 124#ifndef IN6_IS_ADDR_V4MAPPED 125#define IN6_IS_ADDR_V4MAPPED(x) \ 126 (memcmp((x)->s6_addr, in6addr_any.s6_addr, 10) == 0 && \ 127 (x)->s6_addr[10] == 0xff && (x)->s6_addr[11] == 0xff) 128#endif 129 130#ifndef IN6_IS_ADDR_V4COMPAT 131#define IN6_IS_ADDR_V4COMPAT(x) \ 132 (memcmp((x)->s6_addr, in6addr_any.s6_addr, 12) == 0 && \ 133 ((x)->s6_addr[12] != 0 || (x)->s6_addr[13] != 0 || \ 134 (x)->s6_addr[14] != 0 || \ 135 ((x)->s6_addr[15] != 0 && (x)->s6_addr[15] != 1))) 136#endif 137 138#ifndef IN6_IS_ADDR_MULTICAST 139#define IN6_IS_ADDR_MULTICAST(a) ((a)->s6_addr[0] == 0xff) 140#endif 141 142#ifndef IN6_IS_ADDR_LINKLOCAL 143#define IN6_IS_ADDR_LINKLOCAL(a) \ 144 (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80)) 145#endif 146 147#ifndef IN6_IS_ADDR_SITELOCAL 148#define IN6_IS_ADDR_SITELOCAL(a) \ 149 (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0)) 150#endif 151 152 153#ifndef IN6_IS_ADDR_LOOPBACK 154#define IN6_IS_ADDR_LOOPBACK(x) \ 155 (memcmp((x)->s6_addr, in6addr_loopback.s6_addr, 16) == 0) 156#endif 157#endif 158 159#ifndef AF_INET6 160#define AF_INET6 99 161#endif 162 163#ifndef PF_INET6 164#define PF_INET6 AF_INET6 165#endif 166 167#ifndef INADDR_LOOPBACK 168#define INADDR_LOOPBACK 0x7f000001UL 169#endif 170 171#if 0 172#ifndef ISC_PLATFORM_HAVEIN6PKTINFO 173struct in6_pktinfo { 174 struct in6_addr ipi6_addr; /* src/dst IPv6 address */ 175 unsigned int ipi6_ifindex; /* send/recv interface index */ 176}; 177#endif 178#endif 179 180/* 181 * Cope with a missing in6addr_any and in6addr_loopback. 182 */ 183#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRANY) 184extern const struct in6_addr isc_net_in6addrany; 185#define in6addr_any isc_net_in6addrany 186#endif 187 188#if defined(ISC_PLATFORM_HAVEIPV6) && defined(ISC_PLATFORM_NEEDIN6ADDRLOOPBACK) 189extern const struct in6_addr isc_net_in6addrloop; 190#define in6addr_loopback isc_net_in6addrloop 191#endif 192 193/* 194 * Fix UnixWare 7.1.1's broken IN6_IS_ADDR_* definitions. 195 */ 196#ifdef ISC_PLATFORM_FIXIN6ISADDR 197#undef IN6_IS_ADDR_GEOGRAPHIC 198#define IN6_IS_ADDR_GEOGRAPHIC(a) (((a)->S6_un.S6_l[0] & 0xE0) == 0x80) 199#undef IN6_IS_ADDR_IPX 200#define IN6_IS_ADDR_IPX(a) (((a)->S6_un.S6_l[0] & 0xFE) == 0x04) 201#undef IN6_IS_ADDR_LINKLOCAL 202#define IN6_IS_ADDR_LINKLOCAL(a) (((a)->S6_un.S6_l[0] & 0xC0FF) == 0x80FE) 203#undef IN6_IS_ADDR_MULTICAST 204#define IN6_IS_ADDR_MULTICAST(a) (((a)->S6_un.S6_l[0] & 0xFF) == 0xFF) 205#undef IN6_IS_ADDR_NSAP 206#define IN6_IS_ADDR_NSAP(a) (((a)->S6_un.S6_l[0] & 0xFE) == 0x02) 207#undef IN6_IS_ADDR_PROVIDER 208#define IN6_IS_ADDR_PROVIDER(a) (((a)->S6_un.S6_l[0] & 0xE0) == 0x40) 209#undef IN6_IS_ADDR_SITELOCAL 210#define IN6_IS_ADDR_SITELOCAL(a) (((a)->S6_un.S6_l[0] & 0xC0FF) == 0xC0FE) 211#endif /* ISC_PLATFORM_FIXIN6ISADDR */ 212 213/* 214 * Ensure type in_port_t is defined. 215 */ 216#ifdef ISC_PLATFORM_NEEDPORTT 217typedef isc_uint16_t in_port_t; 218#endif 219 220/* 221 * If this system does not have MSG_TRUNC (as returned from recvmsg()) 222 * ISC_PLATFORM_RECVOVERFLOW will be defined. This will enable the MSG_TRUNC 223 * faking code in socket.c. 224 */ 225#ifndef MSG_TRUNC 226#define ISC_PLATFORM_RECVOVERFLOW 227#endif 228 229#define ISC__IPADDR(x) ((isc_uint32_t)htonl((isc_uint32_t)(x))) 230 231#define ISC_IPADDR_ISMULTICAST(i) \ 232 (((isc_uint32_t)(i) & ISC__IPADDR(0xf0000000)) \ 233 == ISC__IPADDR(0xe0000000)) 234 235#define ISC_IPADDR_ISEXPERIMENTAL(i) \ 236 (((isc_uint32_t)(i) & ISC__IPADDR(0xf0000000)) \ 237 == ISC__IPADDR(0xf0000000)) 238 239/*** 240 *** Functions. 241 ***/ 242 243ISC_LANG_BEGINDECLS 244 245isc_result_t 246isc_net_probeipv4(void); 247/* 248 * Check if the system's kernel supports IPv4. 249 * 250 * Returns: 251 * 252 * ISC_R_SUCCESS IPv4 is supported. 253 * ISC_R_NOTFOUND IPv4 is not supported. 254 * ISC_R_DISABLED IPv4 is disabled. 255 * ISC_R_UNEXPECTED 256 */ 257 258isc_result_t 259isc_net_probeipv6(void); 260/* 261 * Check if the system's kernel supports IPv6. 262 * 263 * Returns: 264 * 265 * ISC_R_SUCCESS IPv6 is supported. 266 * ISC_R_NOTFOUND IPv6 is not supported. 267 * ISC_R_DISABLED IPv6 is disabled. 268 * ISC_R_UNEXPECTED 269 */ 270 271isc_result_t 272isc_net_probe_ipv6only(void); 273/* 274 * Check if the system's kernel supports the IPV6_V6ONLY socket option. 275 * 276 * Returns: 277 * 278 * ISC_R_SUCCESS the option is supported for both TCP and UDP. 279 * ISC_R_NOTFOUND IPv6 itself or the option is not supported. 280 * ISC_R_UNEXPECTED 281 */ 282 283isc_result_t 284isc_net_probe_ipv6pktinfo(void); 285/* 286 * Check if the system's kernel supports the IPV6_(RECV)PKTINFO socket option 287 * for UDP sockets. 288 * 289 * Returns: 290 * 291 * ISC_R_SUCCESS the option is supported. 292 * ISC_R_NOTFOUND IPv6 itself or the option is not supported. 293 * ISC_R_UNEXPECTED 294 */ 295 296void 297isc_net_disableipv4(void); 298 299void 300isc_net_disableipv6(void); 301 302void 303isc_net_enableipv4(void); 304 305void 306isc_net_enableipv6(void); 307 308#ifdef ISC_PLATFORM_NEEDNTOP 309const char * 310isc_net_ntop(int af, const void *src, char *dst, size_t size); 311#define inet_ntop isc_net_ntop 312#endif 313 314#ifdef ISC_PLATFORM_NEEDPTON 315int 316isc_net_pton(int af, const char *src, void *dst); 317#undef inet_pton 318#define inet_pton isc_net_pton 319#endif 320 321#ifdef ISC_PLATFORM_NEEDATON 322int 323isc_net_aton(const char *cp, struct in_addr *addr); 324#define inet_aton isc_net_aton 325#endif 326 327ISC_LANG_ENDDECLS 328 329#endif /* ISC_NET_H */ 330