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 1.16  2004/12/01 04:25:05  cheshire
  28 <rdar://problem/3872803> Darwin patches for Solaris and Suse
  29 Provide daemon() for platforms that don't have it
  30
  31 Revision 1.15  2004/11/30 22:37:01  cheshire
  32 Update copyright dates and add "Mode: C; tab-width: 4" headers
  33
  34 Revision 1.14  2004/10/16 00:17:01  cheshire
  35 <rdar://problem/3770558> Replace IP TTL 255 check with local subnet source address check
  36
  37 Revision 1.13  2004/03/20 05:37:09  cheshire
  38 Fix contributed by Terry Lambert & Alfred Perlstein:
  39 Don't use uint8_t -- it requires stdint.h, which doesn't exist on FreeBSD 4.x
  40
  41 Revision 1.12  2004/01/28 21:12:15  cheshire
  42 Reconcile mDNSIPv6Support & HAVE_IPV6 into a single flag (HAVE_IPV6)
  43
  44 Revision 1.11  2003/12/13 05:43:09  bradley
  45 Fixed non-sa_len and non-IPv6 version of GET_SA_LEN macro to cast as sockaddr to access
  46 sa_family so it works with any sockaddr-compatible address structure (e.g. sockaddr_storage).
  47
  48 Revision 1.10  2003/12/11 03:03:51  rpantos
  49 Clean up mDNSPosix so that it builds on OS X again.
  50
  51 Revision 1.9  2003/12/08 20:47:02  rpantos
  52 Add support for mDNSResponder on Linux.
  53
  54 Revision 1.8  2003/08/12 19:56:26  cheshire
  55 Update to APSL 2.0
  56
  57 Revision 1.7  2003/08/06 18:20:51  cheshire
  58 Makefile cleanup
  59
  60 Revision 1.6  2003/07/02 21:19:59  cheshire
  61 <rdar://problem/3313413> Update copyright notices, etc., in source code comments
  62
  63 Revision 1.5  2003/03/13 03:46:21  cheshire
  64 Fixes to make the code build on Linux
  65
  66 Revision 1.4  2002/12/23 22:13:32  jgraessl
  67
  68 Reviewed by: Stuart Cheshire
  69 Initial IPv6 support for mDNSResponder.
  70
  71 Revision 1.3  2002/09/21 20:44:53  zarzycki
  72 Added APSL info
  73
  74 Revision 1.2  2002/09/19 04:20:44  cheshire
  75 Remove high-ascii characters that confuse some systems
  76
  77 Revision 1.1  2002/09/17 06:24:35  cheshire
  78 First checkin
  79
  80 */
  81
  82 #ifndef __mDNSUNP_h
  83 #define __mDNSUNP_h
  84
  85 #include <sys/types.h>
  86 #include <sys/socket.h>
  87 #include <net/if.h>
  88 #include <netinet/in.h>
  89
  90 #ifdef  __cplusplus
  91     extern "C" {
  92 #endif
  93
  94 #ifdef NOT_HAVE_SOCKLEN_T
  95     typedef unsigned int socklen_t;
  96 #endif
  97
  98 #if !defined(_SS_MAXSIZE)
  99     #define sockaddr_storage sockaddr
 100 #endif
 101
 102 #ifndef NOT_HAVE_SA_LEN
 103 #define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
 104                        sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
 105 #elif HAVE_IPV6
 106 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
 107                        ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
 108 #else
 109 #define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
 110 #endif
 111
 112 #define IFI_NAME    16          /* same as IFNAMSIZ in <net/if.h> */
 113 #define IFI_HADDR    8          /* allow for 64-bit EUI-64 in future */
 114
 115 // Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
 116
 117 struct my_in_pktinfo {
 118     struct sockaddr_storage ipi_addr;
 119     int                     ipi_ifindex;            /* received interface index */
 120     char                    ipi_ifname[IFI_NAME];   /* received interface name  */
 121 };
 122
 123 /* From the text (Stevens, section 20.2): */
 124 /* 'As an example of recvmsg we will write a function named recvfrom_flags that */
 125 /* is similar to recvfrom but also returns: */
 126 /*      1. the returned msg_flags value, */
 127 /*      2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
 128 /*      3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
 129 extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
 130                struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
 131
 132 struct ifi_info {
 133   char    ifi_name[IFI_NAME];   /* interface name, null terminated */
 134   u_char  ifi_haddr[IFI_HADDR]; /* hardware address */
 135   u_short ifi_hlen;             /* #bytes in hardware address: 0, 6, 8 */
 136   short   ifi_flags;            /* IFF_xxx constants from <net/if.h> */
 137   short   ifi_myflags;          /* our own IFI_xxx flags */
 138   int     ifi_index;            /* interface index */
 139   struct sockaddr  *ifi_addr;   /* primary address */
 140   struct sockaddr  *ifi_netmask;
 141   struct sockaddr  *ifi_brdaddr;/* broadcast address */
 142   struct sockaddr  *ifi_dstaddr;/* destination address */
 143   struct ifi_info  *ifi_next;   /* next of these structures */
 144 };
 145
 146 #define IFI_ALIAS   1           /* ifi_addr is an alias */
 147
 148 /* From the text (Stevens, section 16.6): */
 149 /* 'Since many programs need to know all the interfaces on a system, we will develop a */
 150 /* function of our own named get_ifi_info that returns a linked list of structures, one */
 151 /* for each interface that is currently "up."' */
 152 extern struct ifi_info  *get_ifi_info(int family, int doaliases);
 153
 154 /* 'The free_ifi_info function, which takes a pointer that was */
 155 /* returned by get_ifi_info and frees all the dynamic memory.' */
 156 extern void             free_ifi_info(struct ifi_info *);
 157
 158 #ifdef NOT_HAVE_DAEMON
 159 extern int daemon(int nochdir, int noclose)
 160 #endif
 161
 162 #ifdef  __cplusplus
 163     }
 164 #endif
 165
 166 #endif