mDNSUNP.h revision 4904:cd464a980538 
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 $
20Revision 1.19  2006/08/14 23:24:47  cheshire
21Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
22
23Revision 1.18  2005/04/08 21:37:57  ksekar
24<rdar://problem/3792767> get_ifi_info doesn't return IPv6 interfaces on Linux
25
26Revision 1.17  2004/12/17 19:32:43  cheshire
27Add missing semicolon
28
29Revision 1.16  2004/12/01 04:25:05  cheshire
30<rdar://problem/3872803> Darwin patches for Solaris and Suse
31Provide daemon() for platforms that don't have it
32
33Revision 1.15  2004/11/30 22:37:01  cheshire
34Update copyright dates and add "Mode: C; tab-width: 4" headers
35
36Revision 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
39Revision 1.13  2004/03/20 05:37:09  cheshire
40Fix contributed by Terry Lambert & Alfred Perlstein:
41Don't use uint8_t -- it requires stdint.h, which doesn't exist on FreeBSD 4.x
42
43Revision 1.12  2004/01/28 21:12:15  cheshire
44Reconcile mDNSIPv6Support & HAVE_IPV6 into a single flag (HAVE_IPV6)
45
46Revision 1.11  2003/12/13 05:43:09  bradley
47Fixed non-sa_len and non-IPv6 version of GET_SA_LEN macro to cast as sockaddr to access
48sa_family so it works with any sockaddr-compatible address structure (e.g. sockaddr_storage).
49
50Revision 1.10  2003/12/11 03:03:51  rpantos
51Clean up mDNSPosix so that it builds on OS X again.
52
53Revision 1.9  2003/12/08 20:47:02  rpantos
54Add support for mDNSResponder on Linux.
55
56Revision 1.8  2003/08/12 19:56:26  cheshire
57Update to APSL 2.0
58
59Revision 1.7  2003/08/06 18:20:51  cheshire
60Makefile cleanup
61
62Revision 1.6  2003/07/02 21:19:59  cheshire
63<rdar://problem/3313413> Update copyright notices, etc., in source code comments
64
65Revision 1.5  2003/03/13 03:46:21  cheshire
66Fixes to make the code build on Linux
67
68Revision 1.4  2002/12/23 22:13:32  jgraessl
69
70Reviewed by: Stuart Cheshire
71Initial IPv6 support for mDNSResponder.
72
73Revision 1.3  2002/09/21 20:44:53  zarzycki
74Added APSL info
75
76Revision 1.2  2002/09/19 04:20:44  cheshire
77Remove high-ascii characters that confuse some systems
78
79Revision 1.1  2002/09/17 06:24:35  cheshire
80First checkin
81
82*/
83
84#pragma ident	"%Z%%M%	%I%	%E% SMI"
85
86#ifndef __mDNSUNP_h
87#define __mDNSUNP_h
88
89#include <sys/types.h>
90#include <sys/socket.h>
91#include <net/if.h>
92#include <netinet/in.h>
93#include <arpa/inet.h>
94
95#ifdef HAVE_LINUX
96#include <linux/socket.h>
97#endif
98
99#ifdef  __cplusplus
100    extern "C" {
101#endif
102
103#ifdef NOT_HAVE_SOCKLEN_T
104    typedef unsigned int socklen_t;
105#endif
106
107#if !defined(_SS_MAXSIZE)
108#if HAVE_IPV6
109#define sockaddr_storage sockaddr_in6
110#else
111#define sockaddr_storage sockaddr
112#endif // HAVE_IPV6
113#endif // !defined(_SS_MAXSIZE)
114
115#ifndef NOT_HAVE_SA_LEN
116#define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
117                       sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
118#elif HAVE_IPV6
119#define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
120                       ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
121#else
122#define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
123#endif
124
125#define IFI_NAME    16          /* same as IFNAMSIZ in <net/if.h> */
126#define IFI_HADDR    8          /* allow for 64-bit EUI-64 in future */
127
128// Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
129
130struct my_in_pktinfo {
131    struct sockaddr_storage ipi_addr;
132    int                     ipi_ifindex;            /* received interface index */
133    char                    ipi_ifname[IFI_NAME];   /* received interface name  */
134};
135
136/* From the text (Stevens, section 20.2): */
137/* 'As an example of recvmsg we will write a function named recvfrom_flags that */
138/* is similar to recvfrom but also returns: */
139/*	1. the returned msg_flags value, */
140/*	2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
141/*	3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
142extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
143               struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
144
145struct ifi_info {
146  char    ifi_name[IFI_NAME];   /* interface name, null terminated */
147  u_char  ifi_haddr[IFI_HADDR]; /* hardware address */
148  u_short ifi_hlen;             /* #bytes in hardware address: 0, 6, 8 */
149  short   ifi_flags;            /* IFF_xxx constants from <net/if.h> */
150  short   ifi_myflags;          /* our own IFI_xxx flags */
151  int     ifi_index;            /* interface index */
152  struct sockaddr  *ifi_addr;   /* primary address */
153  struct sockaddr  *ifi_netmask;
154  struct sockaddr  *ifi_brdaddr;/* broadcast address */
155  struct sockaddr  *ifi_dstaddr;/* destination address */
156  struct ifi_info  *ifi_next;   /* next of these structures */
157};
158
159#if defined(AF_INET6) && HAVE_IPV6 && HAVE_LINUX
160#define PROC_IFINET6_PATH "/proc/net/if_inet6"
161extern struct ifi_info  *get_ifi_info_linuxv6(int family, int doaliases);
162#endif
163
164#if defined(AF_INET6) && HAVE_IPV6
165#define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */
166#endif
167
168
169
170#define IFI_ALIAS   1           /* ifi_addr is an alias */
171
172/* From the text (Stevens, section 16.6): */
173/* 'Since many programs need to know all the interfaces on a system, we will develop a */
174/* function of our own named get_ifi_info that returns a linked list of structures, one */
175/* for each interface that is currently "up."' */
176extern struct ifi_info  *get_ifi_info(int family, int doaliases);
177
178/* 'The free_ifi_info function, which takes a pointer that was */
179/* returned by get_ifi_info and frees all the dynamic memory.' */
180extern void             free_ifi_info(struct ifi_info *);
181
182#ifdef NOT_HAVE_DAEMON
183extern int daemon(int nochdir, int noclose);
184#endif
185
186#ifdef  __cplusplus
187    }
188#endif
189
190#endif
191