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fake-rfc2553.h
1 /*
2  * Copyright (C) 2000-2003 Damien Miller. All rights reserved.
3  * Copyright (C) 1999 WIDE Project. All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the project nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 /*
31  * Pseudo-implementation of RFC2553 name / address resolution functions
32  *
33  * But these functions are not implemented correctly. The minimum subset
34  * is implemented for ssh use only. For example, this routine assumes
35  * that ai_family is AF_INET. Don't use it for another purpose.
36  */
37 
38 #ifndef _FAKE_RFC2553_H
39 #define _FAKE_RFC2553_H
40 
41 #include "includes.h"
42 #include <sys/types.h>
43 #if defined(HAVE_NETDB_H)
44 # include <netdb.h>
45 #endif
46 
47 /*
48  * First, socket and INET6 related definitions
49  */
50 #ifndef HAVE_STRUCT_SOCKADDR_STORAGE
51 # define _SS_MAXSIZE 128 /* Implementation specific max size */
52 # define _SS_PADSIZE (_SS_MAXSIZE - sizeof (struct sockaddr))
53 struct sockaddr_storage {
54  struct sockaddr ss_sa;
55  char __ss_pad2[_SS_PADSIZE];
56 };
57 # define ss_family ss_sa.sa_family
58 #endif /* !HAVE_STRUCT_SOCKADDR_STORAGE */
59 
60 #ifndef IN6_IS_ADDR_LOOPBACK
61 # define IN6_IS_ADDR_LOOPBACK(a) \
62  (((u_int32_t *)(a))[0] == 0 && ((u_int32_t *)(a))[1] == 0 && \
63  ((u_int32_t *)(a))[2] == 0 && ((u_int32_t *)(a))[3] == htonl(1))
64 #endif /* !IN6_IS_ADDR_LOOPBACK */
65 
66 #ifndef HAVE_STRUCT_IN6_ADDR
67 struct in6_addr {
68  u_int8_t s6_addr[16];
69 };
70 #endif /* !HAVE_STRUCT_IN6_ADDR */
71 
72 #ifndef HAVE_STRUCT_SOCKADDR_IN6
73 struct sockaddr_in6 {
74  unsigned short sin6_family;
75  u_int16_t sin6_port;
76  u_int32_t sin6_flowinfo;
77  struct in6_addr sin6_addr;
78  u_int32_t sin6_scope_id;
79 };
80 #endif /* !HAVE_STRUCT_SOCKADDR_IN6 */
81 
82 #ifndef AF_INET6
83 /* Define it to something that should never appear */
84 #define AF_INET6 AF_MAX
85 #endif
86 
87 /*
88  * Next, RFC2553 name / address resolution API
89  */
90 
91 #ifndef NI_NUMERICHOST
92 # define NI_NUMERICHOST (1)
93 #endif
94 #ifndef NI_NAMEREQD
95 # define NI_NAMEREQD (1<<1)
96 #endif
97 #ifndef NI_NUMERICSERV
98 # define NI_NUMERICSERV (1<<2)
99 #endif
100 
101 #ifndef AI_PASSIVE
102 # define AI_PASSIVE (1)
103 #endif
104 #ifndef AI_CANONNAME
105 # define AI_CANONNAME (1<<1)
106 #endif
107 #ifndef AI_NUMERICHOST
108 # define AI_NUMERICHOST (1<<2)
109 #endif
110 #ifndef AI_NUMERICSERV
111 # define AI_NUMERICSERV (1<<3)
112 #endif
113 
114 #ifndef NI_MAXSERV
115 # define NI_MAXSERV 32
116 #endif /* !NI_MAXSERV */
117 #ifndef NI_MAXHOST
118 # define NI_MAXHOST 1025
119 #endif /* !NI_MAXHOST */
120 
121 #ifndef EAI_NODATA
122 # define EAI_NODATA (INT_MAX - 1)
123 #endif
124 #ifndef EAI_MEMORY
125 # define EAI_MEMORY (INT_MAX - 2)
126 #endif
127 #ifndef EAI_NONAME
128 # define EAI_NONAME (INT_MAX - 3)
129 #endif
130 #ifndef EAI_SYSTEM
131 # define EAI_SYSTEM (INT_MAX - 4)
132 #endif
133 #ifndef EAI_FAMILY
134 # define EAI_FAMILY (INT_MAX - 5)
135 #endif
136 
137 #ifndef HAVE_STRUCT_ADDRINFO
138 struct addrinfo {
139  int ai_flags; /* AI_PASSIVE, AI_CANONNAME */
140  int ai_family; /* PF_xxx */
141  int ai_socktype; /* SOCK_xxx */
142  int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
143  size_t ai_addrlen; /* length of ai_addr */
144  char *ai_canonname; /* canonical name for hostname */
145  struct sockaddr *ai_addr; /* binary address */
146  struct addrinfo *ai_next; /* next structure in linked list */
147 };
148 #endif /* !HAVE_STRUCT_ADDRINFO */
149 
150 #ifndef HAVE_GETADDRINFO
151 #ifdef getaddrinfo
152 # undef getaddrinfo
153 #endif
154 #define getaddrinfo(a,b,c,d) (ssh_getaddrinfo(a,b,c,d))
155 int getaddrinfo(const char *, const char *,
156  const struct addrinfo *, struct addrinfo **);
157 #endif /* !HAVE_GETADDRINFO */
158 
159 #if !defined(HAVE_GAI_STRERROR) && !defined(HAVE_CONST_GAI_STRERROR_PROTO)
160 #define gai_strerror(a) (_ssh_compat_gai_strerror(a))
161 char *gai_strerror(int);
162 #endif /* !HAVE_GAI_STRERROR */
163 
164 #ifndef HAVE_FREEADDRINFO
165 #define freeaddrinfo(a) (ssh_freeaddrinfo(a))
166 void freeaddrinfo(struct addrinfo *);
167 #endif /* !HAVE_FREEADDRINFO */
168 
169 #ifndef HAVE_GETNAMEINFO
170 #define getnameinfo(a,b,c,d,e,f,g) (ssh_getnameinfo(a,b,c,d,e,f,g))
171 int getnameinfo(const struct sockaddr *, size_t, char *, size_t,
172  char *, size_t, int);
173 #endif /* !HAVE_GETNAMEINFO */
174 
175 #endif /* !_FAKE_RFC2553_H */
176