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
18#ifndef __mDNSUNP_h
19#define __mDNSUNP_h
20
21#include <sys/types.h>
22#include <sys/socket.h>
23#include <net/if.h>
24#include <netinet/in.h>
25
26#ifdef HAVE_LINUX
27#include <linux/socket.h>
28#define IPV6_2292_PKTINFO  IPV6_2292PKTINFO
29#define IPV6_2292_HOPLIMIT IPV6_2292HOPLIMIT
30#else
31// The following are the supported non-linux posix OSes -
32// netbsd, freebsd and openbsd.
33#if HAVE_IPV6
34#define IPV6_2292_PKTINFO  19
35#define IPV6_2292_HOPLIMIT 20
36#endif
37#endif
38
39#ifdef  __cplusplus
40extern "C" {
41#endif
42
43#ifdef NOT_HAVE_SOCKLEN_T
44typedef unsigned int socklen_t;
45#endif
46
47#if !defined(_SS_MAXSIZE)
48#if HAVE_IPV6
49#define sockaddr_storage sockaddr_in6
50#else
51#define sockaddr_storage sockaddr
52#endif // HAVE_IPV6
53#endif // !defined(_SS_MAXSIZE)
54
55#ifndef NOT_HAVE_SA_LEN
56#define GET_SA_LEN(X) (sizeof(struct sockaddr) > ((struct sockaddr*)&(X))->sa_len ? \
57                       sizeof(struct sockaddr) : ((struct sockaddr*)&(X))->sa_len   )
58#elif HAVE_IPV6
59#define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET  ? sizeof(struct sockaddr_in) : \
60                       ((struct sockaddr*)&(X))->sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr))
61#else
62#define GET_SA_LEN(X) (((struct sockaddr*)&(X))->sa_family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr))
63#endif
64
65#define IFI_NAME    16          /* same as IFNAMSIZ in <net/if.h> */
66#define IFI_HADDR    8          /* allow for 64-bit EUI-64 in future */
67
68// Renamed from my_in_pktinfo because in_pktinfo is used by Linux.
69
70struct my_in_pktinfo {
71    struct sockaddr_storage ipi_addr;
72    int ipi_ifindex;                                /* received interface index */
73    char ipi_ifname[IFI_NAME];                      /* received interface name  */
74};
75
76/* From the text (Stevens, section 20.2): */
77/* 'As an example of recvmsg we will write a function named recvfrom_flags that */
78/* is similar to recvfrom but also returns: */
79/*	1. the returned msg_flags value, */
80/*	2. the destination addres of the received datagram (from the IP_RECVDSTADDR socket option, and */
81/*	3. the index of the interface on which the datagram was received (the IP_RECVIF socket option).' */
82extern ssize_t recvfrom_flags(int fd, void *ptr, size_t nbytes, int *flagsp,
83                              struct sockaddr *sa, socklen_t *salenptr, struct my_in_pktinfo *pktp, u_char *ttl);
84
85struct ifi_info {
86    char ifi_name[IFI_NAME];    /* interface name, null terminated */
87    u_char ifi_haddr[IFI_HADDR]; /* hardware address */
88    u_short ifi_hlen;           /* #bytes in hardware address: 0, 6, 8 */
89    short ifi_flags;            /* IFF_xxx constants from <net/if.h> */
90    short ifi_myflags;          /* our own IFI_xxx flags */
91    int ifi_index;              /* interface index */
92    struct sockaddr  *ifi_addr; /* primary address */
93    struct sockaddr  *ifi_netmask;
94    struct sockaddr  *ifi_brdaddr; /* broadcast address */
95    struct sockaddr  *ifi_dstaddr; /* destination address */
96    struct ifi_info  *ifi_next; /* next of these structures */
97};
98
99#if defined(AF_INET6) && HAVE_IPV6 && HAVE_LINUX
100#define PROC_IFINET6_PATH "/proc/net/if_inet6"
101extern struct ifi_info  *get_ifi_info_linuxv6(int family, int doaliases);
102#endif
103
104#if defined(AF_INET6) && HAVE_IPV6
105#define INET6_ADDRSTRLEN 46 /*Maximum length of IPv6 address */
106#endif
107
108
109
110#define IFI_ALIAS   1           /* ifi_addr is an alias */
111
112/* From the text (Stevens, section 16.6): */
113/* 'Since many programs need to know all the interfaces on a system, we will develop a */
114/* function of our own named get_ifi_info that returns a linked list of structures, one */
115/* for each interface that is currently "up."' */
116extern struct ifi_info  *get_ifi_info(int family, int doaliases);
117
118/* 'The free_ifi_info function, which takes a pointer that was */
119/* returned by get_ifi_info and frees all the dynamic memory.' */
120extern void             free_ifi_info(struct ifi_info *);
121
122#ifdef NOT_HAVE_DAEMON
123extern int daemon(int nochdir, int noclose);
124#endif
125
126#ifdef  __cplusplus
127}
128#endif
129
130#endif
131