mDNSPosix/mDNSUNP.h

   1 /* -*- Mode: C; tab-width: 4 -*-
   2  *
   3  * Copyright (c) 2002-2004 Apple Computer, Inc. All rights reserved.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16
  17     Change History (most recent first):
  18
  19 $Log: mDNSUNP.h,v $
  20 Revision 1.19  2006/08/14 23:24:47  cheshire
  21 Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
  22
  23 Revision 1.18  2005/04/08 21:37:57  ksekar
  24 <rdar://problem/3792767> get_ifi_info doesn't return IPv6 interfaces on Linux
  25
  26 Revision 1.17  2004/12/17 19:32:43  cheshire
  27 Add missing semicolon
  28
  29 Revision 1.16  2004/12/01 04:25:05  cheshire
  30 <rdar://problem/3872803> Darwin patches for Solaris and Suse
  31 Provide daemon() for platforms that don't have it
  32
  33 Revision 1.15  2004/11/30 22:37:01  cheshire
  34 Update copyright dates and add "Mode: C; tab-width: 4" headers
  35
  36 Revision 1.14  2004/10/16 00:17:01  cheshire
  37 <rdar://problem/3770558> Replace IP TTL 255 check with local subnet source address check
  38
  39 Revision 1.13  2004/03/20 05:37:09  cheshire
  40 Fix contributed by Terry Lambert & Alfred Perlstein:
  41 Don't use uint8_t -- it requires stdint.h, which doesn't exist on FreeBSD 4.x
  42
  43 Revision 1.12  2004/01/28 21:12:15  cheshire
  44 Reconcile mDNSIPv6Support & HAVE_IPV6 into a single flag (HAVE_IPV6)
  45
  46 Revision 1.11  2003/12/13 05:43:09  bradley
  47 Fixed non-sa_len and non-IPv6 version of GET_SA_LEN macro to cast as sockaddr to access
  48 sa_family so it works with any sockaddr-compatible address structure (e.g. sockaddr_storage).
  49
  50 Revision 1.10  2003/12/11 03:03:51  rpantos
  51 Clean up mDNSPosix so that it builds on OS X again.
  52
  53 Revision 1.9  2003/12/08 20:47:02  rpantos
  54 Add support for mDNSResponder on Linux.
  55
  56 Revision 1.8  2003/08/12 19:56:26  cheshire
  57 Update to APSL 2.0
  58
  59 Revision 1.7  2003/08/06 18:20:51  cheshire
  60 Makefile cleanup
  61
  62 Revision 1.6  2003/07/02 21:19:59  cheshire
  63 <rdar://problem/3313413> Update copyright notices, etc., in source code comments
  64
  65 Revision 1.5  2003/03/13 03:46:21  cheshire
  66 Fixes to make the code build on Linux
  67
  68 Revision 1.4  2002/12/23 22:13:32  jgraessl
  69
  70 Reviewed by: Stuart Cheshire
  71 Initial IPv6 support for mDNSResponder.
  72
  73 Revision 1.3  2002/09/21 20:44:53  zarzycki
  74 Added APSL info
  75
  76 Revision 1.2  2002/09/19 04:20:44  cheshire
  77 Remove high-ascii characters that confuse some systems
  78
  79 Revision 1.1  2002/09/17 06:24:35  cheshire
  80 First checkin
  81
  82 */
  83
  84 #ifndef __mDNSUNP_h
  85 #define __mDNSUNP_h
  86
  87 #include <sys/types.h>
  88 #include <sys/socket.h>
  89 #include <net/if.h>
  90 #include <netinet/in.h>
  91
  92 #ifdef HAVE_LINUX
  93 #include <linux/socket.h>
  94 #endif
  95
  96 #ifdef  __cplusplus
  97     extern "C" {
  98 #endif
  99
 100 #ifdef NOT_HAVE_SOCKLEN_T
 101     typedef unsigned int socklen_t;
 102 #endif
 103
 104 #if !defined(_SS_MAXSIZE)
 105 #if HAVE_IPV6
 106 #define sockaddr_storage sockaddr_in6
 107 #else
 108 #define sockaddr_storage sockaddr
 109 #endif // HAVE_IPV6
 110 #endif // !defined(_SS_MAXSIZE)
 111
 112 #ifndef NOT_HAVE_SA_LEN
 113 #define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
 114                        sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
 115 #elif HAVE_IPV6
 116 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
 117                        ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
 118 #else
 119 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
 120 #endif
 121
 122 #define IFI_NAME    16          /* same as IFNAMSIZ in <net/if.h> */
 123 #define IFI_HADDR    8          /* allow for 64-bit EUI-64 in future */
 124
 125 // Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
 126
 127 struct my_in_pktinfo {
 128     struct sockaddr_storage ipi_addr;
 129     int                     ipi_ifindex;            /* received interface index */
 130     char                    ipi_ifname[IFI_NAME];   /* received interface name  */
 131 };
 132
 133 /* From the text (Stevens, section 20.2): */
 134 /* 'As an example of recvmsg we will write a function named recvfrom_flags that */
 135 /* is similar to recvfrom but also returns: */
 136 /*      1. the returned msg_flags value, */
 137 /*      2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
 138 /*      3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
 139 extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
 140                struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
 141
 142 struct ifi_info {
 143   char    ifi_name[IFI_NAME];   /* interface name, null terminated */
 144   u_char  ifi_haddr[IFI_HADDR]; /* hardware address */
 145   u_short ifi_hlen;             /* #bytes in hardware address: 0, 6, 8 */
 146   short   ifi_flags;            /* IFF_xxx constants from <net/if.h> */
 147   short   ifi_myflags;          /* our own IFI_xxx flags */
 148   int     ifi_index;            /* interface index */
 149   struct sockaddr  *ifi_addr;   /* primary address */
 150   struct sockaddr  *ifi_netmask;
 151   struct sockaddr  *ifi_brdaddr;/* broadcast address */
 152   struct sockaddr  *ifi_dstaddr;/* destination address */
 153   struct ifi_info  *ifi_next;   /* next of these structures */
 154 };
 155
 156 #if defined(AF_INET6) && HAVE_IPV6 && HAVE_LINUX
 157 #define PROC_IFINET6_PATH "/proc/net/if_inet6"
 158 extern struct ifi_info  *get_ifi_info_linuxv6(int family, int doaliases);
 159 #endif
 160
 161 #if defined(AF_INET6) && HAVE_IPV6
 162 #define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */
 163 #endif
 164
 165
 166
 167 #define IFI_ALIAS   1           /* ifi_addr is an alias */
 168
 169 /* From the text (Stevens, section 16.6): */
 170 /* 'Since many programs need to know all the interfaces on a system, we will develop a */
 171 /* function of our own named get_ifi_info that returns a linked list of structures, one */
 172 /* for each interface that is currently "up."' */
 173 extern struct ifi_info  *get_ifi_info(int family, int doaliases);
 174
 175 /* 'The free_ifi_info function, which takes a pointer that was */
 176 /* returned by get_ifi_info and frees all the dynamic memory.' */
 177 extern void             free_ifi_info(struct ifi_info *);
 178
 179 #ifdef NOT_HAVE_DAEMON
 180 extern int daemon(int nochdir, int noclose);
 181 #endif
 182
 183 #ifdef  __cplusplus
 184     }
 185 #endif
 186
 187 #endif