3 * Taken from OpenSSH 3.8.1p1
5 * Copyright (C) 2000-2003 Damien Miller. All rights reserved.
6 * Copyright (C) 1999 WIDE Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * Pseudo-implementation of RFC2553 name / address resolution functions
36 * But these functions are not implemented correctly. The minimum subset
37 * is implemented for ssh use only. For example, this routine assumes
38 * that ai_family is AF_INET. Don't use it for another purpose.
43 /* RCSID("$.Id: fake-rfc2553.c,v 1.5 2003/09/22 02:08:23 dtucker Exp $");*/
45 #ifndef HAVE_GETNAMEINFO
46 int getnameinfo(const struct sockaddr
*sa
, size_t salen
, char *host
,
47 size_t hostlen
, char *serv
, size_t servlen
, int flags
)
49 struct sockaddr_in
*sin
= (struct sockaddr_in
*)sa
;
54 snprintf(tmpserv
, sizeof(tmpserv
), "%d", ntohs(sin
->sin_port
));
55 if (strlcpy(serv
, tmpserv
, servlen
) >= servlen
)
60 if (flags
& NI_NUMERICHOST
) {
61 if (strlcpy(host
, inet_ntoa(sin
->sin_addr
),
67 hp
= gethostbyaddr((char *)&sin
->sin_addr
,
68 sizeof(struct in_addr
), AF_INET
);
72 if (strlcpy(host
, hp
->h_name
, hostlen
) >= hostlen
)
80 #endif /* !HAVE_GETNAMEINFO */
82 #ifndef HAVE_GAI_STRERROR
83 #ifdef HAVE_CONST_GAI_STRERROR_PROTO
92 return ("no address associated with name");
94 return ("memory allocation failure.");
96 return ("nodename nor servname provided, or not known");
98 return ("unknown/invalid error.");
101 #endif /* !HAVE_GAI_STRERROR */
103 #ifndef HAVE_FREEADDRINFO
105 freeaddrinfo(struct addrinfo
*ai
)
107 struct addrinfo
*next
;
115 #endif /* !HAVE_FREEADDRINFO */
117 #ifndef HAVE_GETADDRINFO
119 addrinfo
*malloc_ai(int port
, u_long addr
, const struct addrinfo
*hints
)
123 ai
= malloc(sizeof(*ai
) + sizeof(struct sockaddr_in
));
127 memset(ai
, '\0', sizeof(*ai
) + sizeof(struct sockaddr_in
));
129 ai
->ai_addr
= (struct sockaddr
*)(ai
+ 1);
130 /* XXX -- ssh doesn't use sa_len */
131 ai
->ai_addrlen
= sizeof(struct sockaddr_in
);
132 ai
->ai_addr
->sa_family
= ai
->ai_family
= AF_INET
;
134 ((struct sockaddr_in
*)(ai
)->ai_addr
)->sin_port
= port
;
135 ((struct sockaddr_in
*)(ai
)->ai_addr
)->sin_addr
.s_addr
= addr
;
137 /* XXX: the following is not generally correct, but does what we want */
138 if (hints
->ai_socktype
)
139 ai
->ai_socktype
= hints
->ai_socktype
;
141 ai
->ai_socktype
= SOCK_STREAM
;
143 if (hints
->ai_protocol
)
144 ai
->ai_protocol
= hints
->ai_protocol
;
150 getaddrinfo(const char *hostname
, const char *servname
,
151 const struct addrinfo
*hints
, struct addrinfo
**res
)
161 if (servname
!= NULL
) {
164 port
= strtol(servname
, &cp
, 10);
165 if (port
> 0 && port
<= 65535 && *cp
== '\0')
167 else if ((sp
= getservbyname(servname
, NULL
)) != NULL
)
173 if (hints
&& hints
->ai_flags
& AI_PASSIVE
) {
174 addr
= htonl(0x00000000);
175 if (hostname
&& inet_aton(hostname
, &in
) != 0)
177 *res
= malloc_ai(port
, addr
, hints
);
184 *res
= malloc_ai(port
, htonl(0x7f000001), hints
);
190 if (inet_aton(hostname
, &in
)) {
191 *res
= malloc_ai(port
, in
.s_addr
, hints
);
197 /* Don't try DNS if AI_NUMERICHOST is set */
198 if (hints
&& hints
->ai_flags
& AI_NUMERICHOST
)
201 hp
= gethostbyname(hostname
);
202 if (hp
&& hp
->h_name
&& hp
->h_name
[0] && hp
->h_addr_list
[0]) {
203 struct addrinfo
*cur
, *prev
;
205 cur
= prev
= *res
= NULL
;
206 for (i
= 0; hp
->h_addr_list
[i
]; i
++) {
207 struct in_addr
*in
= (struct in_addr
*)hp
->h_addr_list
[i
];
209 cur
= malloc_ai(port
, in
->s_addr
, hints
);
227 #endif /* !HAVE_GETADDRINFO */