1b7579f77SDag-Erling Smørgrav /* From openssh 4.3p2 filename openbsd-compat/fake-rfc2553.h */
2b7579f77SDag-Erling Smørgrav /*
3b7579f77SDag-Erling Smørgrav * Copyright (C) 2000-2003 Damien Miller. All rights reserved.
4b7579f77SDag-Erling Smørgrav * Copyright (C) 1999 WIDE Project. All rights reserved.
5b7579f77SDag-Erling Smørgrav *
6b7579f77SDag-Erling Smørgrav * Redistribution and use in source and binary forms, with or without
7b7579f77SDag-Erling Smørgrav * modification, are permitted provided that the following conditions
8b7579f77SDag-Erling Smørgrav * are met:
9b7579f77SDag-Erling Smørgrav * 1. Redistributions of source code must retain the above copyright
10b7579f77SDag-Erling Smørgrav * notice, this list of conditions and the following disclaimer.
11b7579f77SDag-Erling Smørgrav * 2. Redistributions in binary form must reproduce the above copyright
12b7579f77SDag-Erling Smørgrav * notice, this list of conditions and the following disclaimer in the
13b7579f77SDag-Erling Smørgrav * documentation and/or other materials provided with the distribution.
14b7579f77SDag-Erling Smørgrav * 3. Neither the name of the project nor the names of its contributors
15b7579f77SDag-Erling Smørgrav * may be used to endorse or promote products derived from this software
16b7579f77SDag-Erling Smørgrav * without specific prior written permission.
17b7579f77SDag-Erling Smørgrav *
18b7579f77SDag-Erling Smørgrav * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
19b7579f77SDag-Erling Smørgrav * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20b7579f77SDag-Erling Smørgrav * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21b7579f77SDag-Erling Smørgrav * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
22b7579f77SDag-Erling Smørgrav * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23b7579f77SDag-Erling Smørgrav * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24b7579f77SDag-Erling Smørgrav * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25b7579f77SDag-Erling Smørgrav * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26b7579f77SDag-Erling Smørgrav * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27b7579f77SDag-Erling Smørgrav * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28b7579f77SDag-Erling Smørgrav * SUCH DAMAGE.
29b7579f77SDag-Erling Smørgrav */
30b7579f77SDag-Erling Smørgrav
31b7579f77SDag-Erling Smørgrav /*
32b7579f77SDag-Erling Smørgrav * Pseudo-implementation of RFC2553 name / address resolution functions
33b7579f77SDag-Erling Smørgrav *
34b7579f77SDag-Erling Smørgrav * But these functions are not implemented correctly. The minimum subset
35b7579f77SDag-Erling Smørgrav * is implemented for ssh use only. For example, this routine assumes
36b7579f77SDag-Erling Smørgrav * that ai_family is AF_INET. Don't use it for another purpose.
37b7579f77SDag-Erling Smørgrav */
38b7579f77SDag-Erling Smørgrav
39b7579f77SDag-Erling Smørgrav #include <unistd.h>
40b7579f77SDag-Erling Smørgrav #include <string.h>
41b7579f77SDag-Erling Smørgrav #include <stdio.h>
42b7579f77SDag-Erling Smørgrav #include <stdlib.h>
43b7579f77SDag-Erling Smørgrav #include "compat/fake-rfc2553.h"
44b7579f77SDag-Erling Smørgrav
45b7579f77SDag-Erling Smørgrav #ifndef HAVE_GETNAMEINFO
getnameinfo(const struct sockaddr * sa,size_t ATTR_UNUSED (salen),char * host,size_t hostlen,char * serv,size_t servlen,int flags)46b7579f77SDag-Erling Smørgrav int getnameinfo(const struct sockaddr *sa, size_t ATTR_UNUSED(salen), char *host,
47b7579f77SDag-Erling Smørgrav size_t hostlen, char *serv, size_t servlen, int flags)
48b7579f77SDag-Erling Smørgrav {
49b7579f77SDag-Erling Smørgrav struct sockaddr_in *sin = (struct sockaddr_in *)sa;
50b7579f77SDag-Erling Smørgrav struct hostent *hp;
51b7579f77SDag-Erling Smørgrav char tmpserv[16];
52b7579f77SDag-Erling Smørgrav
53b7579f77SDag-Erling Smørgrav if (serv != NULL) {
54b7579f77SDag-Erling Smørgrav snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
55b7579f77SDag-Erling Smørgrav if (strlcpy(serv, tmpserv, servlen) >= servlen)
56b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
57b7579f77SDag-Erling Smørgrav }
58b7579f77SDag-Erling Smørgrav
59b7579f77SDag-Erling Smørgrav if (host != NULL) {
60b7579f77SDag-Erling Smørgrav if (flags & NI_NUMERICHOST) {
61b7579f77SDag-Erling Smørgrav if (strlcpy(host, inet_ntoa(sin->sin_addr),
62b7579f77SDag-Erling Smørgrav hostlen) >= hostlen)
63b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
64b7579f77SDag-Erling Smørgrav else
65b7579f77SDag-Erling Smørgrav return (0);
66b7579f77SDag-Erling Smørgrav } else {
67b7579f77SDag-Erling Smørgrav hp = gethostbyaddr((char *)&sin->sin_addr,
68b7579f77SDag-Erling Smørgrav sizeof(struct in_addr), AF_INET);
69b7579f77SDag-Erling Smørgrav if (hp == NULL)
70b7579f77SDag-Erling Smørgrav return (EAI_NODATA);
71b7579f77SDag-Erling Smørgrav
72b7579f77SDag-Erling Smørgrav if (strlcpy(host, hp->h_name, hostlen) >= hostlen)
73b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
74b7579f77SDag-Erling Smørgrav else
75b7579f77SDag-Erling Smørgrav return (0);
76b7579f77SDag-Erling Smørgrav }
77b7579f77SDag-Erling Smørgrav }
78b7579f77SDag-Erling Smørgrav return (0);
79b7579f77SDag-Erling Smørgrav }
80b7579f77SDag-Erling Smørgrav #endif /* !HAVE_GETNAMEINFO */
81b7579f77SDag-Erling Smørgrav
82b7579f77SDag-Erling Smørgrav #ifndef HAVE_GAI_STRERROR
83b7579f77SDag-Erling Smørgrav #ifdef HAVE_CONST_GAI_STRERROR_PROTO
84b7579f77SDag-Erling Smørgrav const char *
85b7579f77SDag-Erling Smørgrav #else
86b7579f77SDag-Erling Smørgrav char *
87b7579f77SDag-Erling Smørgrav #endif
gai_strerror(int err)88b7579f77SDag-Erling Smørgrav gai_strerror(int err)
89b7579f77SDag-Erling Smørgrav {
90b7579f77SDag-Erling Smørgrav switch (err) {
91b7579f77SDag-Erling Smørgrav case EAI_NODATA:
92b7579f77SDag-Erling Smørgrav return ("no address associated with name");
93b7579f77SDag-Erling Smørgrav case EAI_MEMORY:
94b7579f77SDag-Erling Smørgrav return ("memory allocation failure.");
95b7579f77SDag-Erling Smørgrav case EAI_NONAME:
96b7579f77SDag-Erling Smørgrav return ("nodename nor servname provided, or not known");
97b7579f77SDag-Erling Smørgrav default:
98b7579f77SDag-Erling Smørgrav return ("unknown/invalid error.");
99b7579f77SDag-Erling Smørgrav }
100b7579f77SDag-Erling Smørgrav }
101b7579f77SDag-Erling Smørgrav #endif /* !HAVE_GAI_STRERROR */
102b7579f77SDag-Erling Smørgrav
103b7579f77SDag-Erling Smørgrav #ifndef HAVE_FREEADDRINFO
104b7579f77SDag-Erling Smørgrav void
freeaddrinfo(struct addrinfo * ai)105b7579f77SDag-Erling Smørgrav freeaddrinfo(struct addrinfo *ai)
106b7579f77SDag-Erling Smørgrav {
107b7579f77SDag-Erling Smørgrav struct addrinfo *next;
108b7579f77SDag-Erling Smørgrav
109b7579f77SDag-Erling Smørgrav for(; ai != NULL;) {
110b7579f77SDag-Erling Smørgrav next = ai->ai_next;
111b7579f77SDag-Erling Smørgrav free(ai);
112b7579f77SDag-Erling Smørgrav ai = next;
113b7579f77SDag-Erling Smørgrav }
114b7579f77SDag-Erling Smørgrav }
115b7579f77SDag-Erling Smørgrav #endif /* !HAVE_FREEADDRINFO */
116b7579f77SDag-Erling Smørgrav
117b7579f77SDag-Erling Smørgrav #ifndef HAVE_GETADDRINFO
118b7579f77SDag-Erling Smørgrav static struct
malloc_ai(int port,u_long addr,const struct addrinfo * hints)119b7579f77SDag-Erling Smørgrav addrinfo *malloc_ai(int port, u_long addr, const struct addrinfo *hints)
120b7579f77SDag-Erling Smørgrav {
121b7579f77SDag-Erling Smørgrav struct addrinfo *ai;
122b7579f77SDag-Erling Smørgrav
123*ff825849SDag-Erling Smørgrav ai = calloc(1, sizeof(*ai) + sizeof(struct sockaddr_in));
124b7579f77SDag-Erling Smørgrav if (ai == NULL)
125b7579f77SDag-Erling Smørgrav return (NULL);
126b7579f77SDag-Erling Smørgrav
127b7579f77SDag-Erling Smørgrav ai->ai_addr = (struct sockaddr *)(ai + 1);
128b7579f77SDag-Erling Smørgrav /* XXX -- ssh doesn't use sa_len */
129b7579f77SDag-Erling Smørgrav ai->ai_addrlen = sizeof(struct sockaddr_in);
130b7579f77SDag-Erling Smørgrav ai->ai_addr->sa_family = ai->ai_family = AF_INET;
131b7579f77SDag-Erling Smørgrav
132b7579f77SDag-Erling Smørgrav ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
133b7579f77SDag-Erling Smørgrav ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
134b7579f77SDag-Erling Smørgrav
135b7579f77SDag-Erling Smørgrav /* XXX: the following is not generally correct, but does what we want */
136b7579f77SDag-Erling Smørgrav if (hints->ai_socktype)
137b7579f77SDag-Erling Smørgrav ai->ai_socktype = hints->ai_socktype;
138b7579f77SDag-Erling Smørgrav else
139b7579f77SDag-Erling Smørgrav ai->ai_socktype = SOCK_STREAM;
140b7579f77SDag-Erling Smørgrav
141b7579f77SDag-Erling Smørgrav if (hints->ai_protocol)
142b7579f77SDag-Erling Smørgrav ai->ai_protocol = hints->ai_protocol;
143b7579f77SDag-Erling Smørgrav
144b7579f77SDag-Erling Smørgrav return (ai);
145b7579f77SDag-Erling Smørgrav }
146b7579f77SDag-Erling Smørgrav
147b7579f77SDag-Erling Smørgrav int
getaddrinfo(const char * hostname,const char * servname,const struct addrinfo * hints,struct addrinfo ** res)148b7579f77SDag-Erling Smørgrav getaddrinfo(const char *hostname, const char *servname,
149b7579f77SDag-Erling Smørgrav const struct addrinfo *hints, struct addrinfo **res)
150b7579f77SDag-Erling Smørgrav {
151b7579f77SDag-Erling Smørgrav struct hostent *hp;
152b7579f77SDag-Erling Smørgrav struct servent *sp;
153b7579f77SDag-Erling Smørgrav struct in_addr in;
154b7579f77SDag-Erling Smørgrav int i;
155b7579f77SDag-Erling Smørgrav long int port;
156b7579f77SDag-Erling Smørgrav u_long addr;
157b7579f77SDag-Erling Smørgrav
158b7579f77SDag-Erling Smørgrav port = 0;
159b7579f77SDag-Erling Smørgrav if (servname != NULL) {
160b7579f77SDag-Erling Smørgrav char *cp;
161b7579f77SDag-Erling Smørgrav
162b7579f77SDag-Erling Smørgrav port = strtol(servname, &cp, 10);
163b7579f77SDag-Erling Smørgrav if (port > 0 && port <= 65535 && *cp == '\0')
164b7579f77SDag-Erling Smørgrav port = htons(port);
165b7579f77SDag-Erling Smørgrav else if ((sp = getservbyname(servname, NULL)) != NULL)
166b7579f77SDag-Erling Smørgrav port = sp->s_port;
167b7579f77SDag-Erling Smørgrav else
168b7579f77SDag-Erling Smørgrav port = 0;
169b7579f77SDag-Erling Smørgrav }
170b7579f77SDag-Erling Smørgrav
171b7579f77SDag-Erling Smørgrav if (hints && hints->ai_flags & AI_PASSIVE) {
172b7579f77SDag-Erling Smørgrav addr = htonl(0x00000000);
173b7579f77SDag-Erling Smørgrav if (hostname && inet_aton(hostname, &in) != 0)
174b7579f77SDag-Erling Smørgrav addr = in.s_addr;
175b7579f77SDag-Erling Smørgrav *res = malloc_ai(port, addr, hints);
176b7579f77SDag-Erling Smørgrav if (*res == NULL)
177b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
178b7579f77SDag-Erling Smørgrav return (0);
179b7579f77SDag-Erling Smørgrav }
180b7579f77SDag-Erling Smørgrav
181b7579f77SDag-Erling Smørgrav if (!hostname) {
182b7579f77SDag-Erling Smørgrav *res = malloc_ai(port, htonl(0x7f000001), hints);
183b7579f77SDag-Erling Smørgrav if (*res == NULL)
184b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
185b7579f77SDag-Erling Smørgrav return (0);
186b7579f77SDag-Erling Smørgrav }
187b7579f77SDag-Erling Smørgrav
188b7579f77SDag-Erling Smørgrav if (inet_aton(hostname, &in)) {
189b7579f77SDag-Erling Smørgrav *res = malloc_ai(port, in.s_addr, hints);
190b7579f77SDag-Erling Smørgrav if (*res == NULL)
191b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
192b7579f77SDag-Erling Smørgrav return (0);
193b7579f77SDag-Erling Smørgrav }
194b7579f77SDag-Erling Smørgrav
195b7579f77SDag-Erling Smørgrav /* Don't try DNS if AI_NUMERICHOST is set */
196b7579f77SDag-Erling Smørgrav if (hints && hints->ai_flags & AI_NUMERICHOST)
197b7579f77SDag-Erling Smørgrav return (EAI_NONAME);
198b7579f77SDag-Erling Smørgrav
199b7579f77SDag-Erling Smørgrav hp = gethostbyname(hostname);
200b7579f77SDag-Erling Smørgrav if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
201b7579f77SDag-Erling Smørgrav struct addrinfo *cur, *prev;
202b7579f77SDag-Erling Smørgrav
203b7579f77SDag-Erling Smørgrav cur = prev = *res = NULL;
204b7579f77SDag-Erling Smørgrav for (i = 0; hp->h_addr_list[i]; i++) {
205b7579f77SDag-Erling Smørgrav struct in_addr *in = (struct in_addr *)hp->h_addr_list[i];
206b7579f77SDag-Erling Smørgrav
207b7579f77SDag-Erling Smørgrav cur = malloc_ai(port, in->s_addr, hints);
208b7579f77SDag-Erling Smørgrav if (cur == NULL) {
209b7579f77SDag-Erling Smørgrav if (*res != NULL)
210b7579f77SDag-Erling Smørgrav freeaddrinfo(*res);
211b7579f77SDag-Erling Smørgrav return (EAI_MEMORY);
212b7579f77SDag-Erling Smørgrav }
213b7579f77SDag-Erling Smørgrav if (prev)
214b7579f77SDag-Erling Smørgrav prev->ai_next = cur;
215b7579f77SDag-Erling Smørgrav else
216b7579f77SDag-Erling Smørgrav *res = cur;
217b7579f77SDag-Erling Smørgrav
218b7579f77SDag-Erling Smørgrav prev = cur;
219b7579f77SDag-Erling Smørgrav }
220b7579f77SDag-Erling Smørgrav return (0);
221b7579f77SDag-Erling Smørgrav }
222b7579f77SDag-Erling Smørgrav
223b7579f77SDag-Erling Smørgrav return (EAI_NODATA);
224b7579f77SDag-Erling Smørgrav }
225b7579f77SDag-Erling Smørgrav #endif /* !HAVE_GETADDRINFO */
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