mDNSPosix/mDNSUNP.h

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2002-2004 Apple Computer, Inc. All rights reserved.
   4  *
   5  * @APPLE_LICENSE_HEADER_START@
   6  *
   7  * This file contains Original Code and/or Modifications of Original Code
   8  * as defined in and that are subject to the Apple Public Source License
   9  * Version 2.0 (the 'License'). You may not use this file except in
  10  * compliance with the License. Please obtain a copy of the License at
  11  * http://www.opensource.apple.com/apsl/ and read it before using this
  12  * file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  19  * Please see the License for the specific language governing rights and
  20  * limitations under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23
  24     Change History (most recent first):
  25
  26 $Log: mDNSUNP.h,v $
  27 Revision 1.18  2005/04/08 21:37:57  ksekar
  28 <rdar://problem/3792767> get_ifi_info doesn't return IPv6 interfaces on Linux
  29
  30 Revision 1.17  2004/12/17 19:32:43  cheshire
  31 Add missing semicolon
  32
  33 Revision 1.16  2004/12/01 04:25:05  cheshire
  34 <rdar://problem/3872803> Darwin patches for Solaris and Suse
  35 Provide daemon() for platforms that don't have it
  36
  37 Revision 1.15  2004/11/30 22:37:01  cheshire
  38 Update copyright dates and add "Mode: C; tab-width: 4" headers
  39
  40 Revision 1.14  2004/10/16 00:17:01  cheshire
  41 <rdar://problem/3770558> Replace IP TTL 255 check with local subnet source address check
  42
  43 Revision 1.13  2004/03/20 05:37:09  cheshire
  44 Fix contributed by Terry Lambert & Alfred Perlstein:
  45 Don't use uint8_t -- it requires stdint.h, which doesn't exist on FreeBSD 4.x
  46
  47 Revision 1.12  2004/01/28 21:12:15  cheshire
  48 Reconcile mDNSIPv6Support & HAVE_IPV6 into a single flag (HAVE_IPV6)
  49
  50 Revision 1.11  2003/12/13 05:43:09  bradley
  51 Fixed non-sa_len and non-IPv6 version of GET_SA_LEN macro to cast as sockaddr to access
  52 sa_family so it works with any sockaddr-compatible address structure (e.g. sockaddr_storage).
  53
  54 Revision 1.10  2003/12/11 03:03:51  rpantos
  55 Clean up mDNSPosix so that it builds on OS X again.
  56
  57 Revision 1.9  2003/12/08 20:47:02  rpantos
  58 Add support for mDNSResponder on Linux.
  59
  60 Revision 1.8  2003/08/12 19:56:26  cheshire
  61 Update to APSL 2.0
  62
  63 Revision 1.7  2003/08/06 18:20:51  cheshire
  64 Makefile cleanup
  65
  66 Revision 1.6  2003/07/02 21:19:59  cheshire
  67 <rdar://problem/3313413> Update copyright notices, etc., in source code comments
  68
  69 Revision 1.5  2003/03/13 03:46:21  cheshire
  70 Fixes to make the code build on Linux
  71
  72 Revision 1.4  2002/12/23 22:13:32  jgraessl
  73
  74 Reviewed by: Stuart Cheshire
  75 Initial IPv6 support for mDNSResponder.
  76
  77 Revision 1.3  2002/09/21 20:44:53  zarzycki
  78 Added APSL info
  79
  80 Revision 1.2  2002/09/19 04:20:44  cheshire
  81 Remove high-ascii characters that confuse some systems
  82
  83 Revision 1.1  2002/09/17 06:24:35  cheshire
  84 First checkin
  85
  86 */
  87
  88 #ifndef __mDNSUNP_h
  89 #define __mDNSUNP_h
  90
  91 #include <sys/types.h>
  92 #include <sys/socket.h>
  93 #include <net/if.h>
  94 #include <netinet/in.h>
  95
  96 #ifdef HAVE_LINUX
  97 #include <linux/socket.h>
  98 #endif
  99
 100 #ifdef  __cplusplus
 101     extern "C" {
 102 #endif
 103
 104 #ifdef NOT_HAVE_SOCKLEN_T
 105     typedef unsigned int socklen_t;
 106 #endif
 107
 108 #if !defined(_SS_MAXSIZE)
 109 #if HAVE_IPV6
 110 #define sockaddr_storage sockaddr_in6
 111 #else
 112 #define sockaddr_storage sockaddr
 113 #endif // HAVE_IPV6
 114 #endif // !defined(_SS_MAXSIZE)
 115
 116 #ifndef NOT_HAVE_SA_LEN
 117 #define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
 118                        sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
 119 #elif HAVE_IPV6
 120 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
 121                        ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
 122 #else
 123 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
 124 #endif
 125
 126 #define IFI_NAME    16          /* same as IFNAMSIZ in <net/if.h> */
 127 #define IFI_HADDR    8          /* allow for 64-bit EUI-64 in future */
 128
 129 // Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
 130
 131 struct my_in_pktinfo {
 132     struct sockaddr_storage ipi_addr;
 133     int                     ipi_ifindex;            /* received interface index */
 134     char                    ipi_ifname[IFI_NAME];   /* received interface name  */
 135 };
 136
 137 /* From the text (Stevens, section 20.2): */
 138 /* 'As an example of recvmsg we will write a function named recvfrom_flags that */
 139 /* is similar to recvfrom but also returns: */
 140 /*      1. the returned msg_flags value, */
 141 /*      2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
 142 /*      3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
 143 extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
 144                struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
 145
 146 struct ifi_info {
 147   char    ifi_name[IFI_NAME];   /* interface name, null terminated */
 148   u_char  ifi_haddr[IFI_HADDR]; /* hardware address */
 149   u_short ifi_hlen;             /* #bytes in hardware address: 0, 6, 8 */
 150   short   ifi_flags;            /* IFF_xxx constants from <net/if.h> */
 151   short   ifi_myflags;          /* our own IFI_xxx flags */
 152   int     ifi_index;            /* interface index */
 153   struct sockaddr  *ifi_addr;   /* primary address */
 154   struct sockaddr  *ifi_netmask;
 155   struct sockaddr  *ifi_brdaddr;/* broadcast address */
 156   struct sockaddr  *ifi_dstaddr;/* destination address */
 157   struct ifi_info  *ifi_next;   /* next of these structures */
 158 };
 159
 160 #if defined(AF_INET6) && HAVE_IPV6 && HAVE_LINUX
 161 #define PROC_IFINET6_PATH "/proc/net/if_inet6"
 162 extern struct ifi_info  *get_ifi_info_linuxv6(int family, int doaliases);
 163 #endif
 164
 165 #if defined(AF_INET6) && HAVE_IPV6
 166 #define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */
 167 #endif
 168
 169
 170
 171 #define IFI_ALIAS   1           /* ifi_addr is an alias */
 172
 173 /* From the text (Stevens, section 16.6): */
 174 /* 'Since many programs need to know all the interfaces on a system, we will develop a */
 175 /* function of our own named get_ifi_info that returns a linked list of structures, one */
 176 /* for each interface that is currently "up."' */
 177 extern struct ifi_info  *get_ifi_info(int family, int doaliases);
 178
 179 /* 'The free_ifi_info function, which takes a pointer that was */
 180 /* returned by get_ifi_info and frees all the dynamic memory.' */
 181 extern void             free_ifi_info(struct ifi_info *);
 182
 183 #ifdef NOT_HAVE_DAEMON
 184 extern int daemon(int nochdir, int noclose);
 185 #endif
 186
 187 #ifdef  __cplusplus
 188     }
 189 #endif
 190
 191 #endif