1 /* From openssh 4.3p2 filename openbsd-compat/fake-rfc2553.h */
3 * Copyright (C) 2000-2003 Damien Miller. All rights reserved.
4 * Copyright (C) 1999 WIDE Project. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the project nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * Pseudo-implementation of RFC2553 name / address resolution functions
34 * But these functions are not implemented correctly. The minimum subset
35 * is implemented for ssh use only. For example, this routine assumes
36 * that ai_family is AF_INET. Don't use it for another purpose.
39 #include <ldns/config.h>
40 #include <ldns/common.h>
45 #include "compat/fake-rfc2553.h"
47 #ifndef HAVE_GETNAMEINFO
48 int getnameinfo(const struct sockaddr *sa, size_t ATTR_UNUSED(salen), char *host,
49 size_t hostlen, char *serv, size_t servlen, int flags)
51 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
56 snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
57 if (strlcpy(serv, tmpserv, servlen) >= servlen)
62 if (flags & NI_NUMERICHOST) {
63 if (strlcpy(host, inet_ntoa(sin->sin_addr),
69 hp = gethostbyaddr((char *)&sin->sin_addr,
70 sizeof(struct in_addr), AF_INET);
74 if (strlcpy(host, hp->h_name, hostlen) >= hostlen)
82 #endif /* !HAVE_GETNAMEINFO */
84 #ifndef HAVE_GAI_STRERROR
85 #ifdef HAVE_CONST_GAI_STRERROR_PROTO
94 return ("no address associated with name");
96 return ("memory allocation failure.");
98 return ("nodename nor servname provided, or not known");
100 return ("unknown/invalid error.");
103 #endif /* !HAVE_GAI_STRERROR */
105 #ifndef HAVE_FREEADDRINFO
107 freeaddrinfo(struct addrinfo *ai)
109 struct addrinfo *next;
117 #endif /* !HAVE_FREEADDRINFO */
119 #ifndef HAVE_GETADDRINFO
121 addrinfo *malloc_ai(int port, u_long addr, const struct addrinfo *hints)
125 ai = malloc(sizeof(*ai) + sizeof(struct sockaddr_in));
129 memset(ai, '\0', sizeof(*ai) + sizeof(struct sockaddr_in));
131 ai->ai_addr = (struct sockaddr *)(ai + 1);
132 /* XXX -- ssh doesn't use sa_len */
133 ai->ai_addrlen = sizeof(struct sockaddr_in);
134 ai->ai_addr->sa_family = ai->ai_family = AF_INET;
136 ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
137 ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
139 /* XXX: the following is not generally correct, but does what we want */
140 if (hints->ai_socktype)
141 ai->ai_socktype = hints->ai_socktype;
143 ai->ai_socktype = SOCK_STREAM;
145 if (hints->ai_protocol)
146 ai->ai_protocol = hints->ai_protocol;
152 getaddrinfo(const char *hostname, const char *servname,
153 const struct addrinfo *hints, struct addrinfo **res)
163 if (servname != NULL) {
166 port = strtol(servname, &cp, 10);
167 if (port > 0 && port <= 65535 && *cp == '\0')
169 else if ((sp = getservbyname(servname, NULL)) != NULL)
175 if (hints && hints->ai_flags & AI_PASSIVE) {
176 addr = htonl(0x00000000);
177 if (hostname && inet_aton(hostname, &in) != 0)
179 *res = malloc_ai(port, addr, hints);
186 *res = malloc_ai(port, htonl(0x7f000001), hints);
192 if (inet_aton(hostname, &in)) {
193 *res = malloc_ai(port, in.s_addr, hints);
199 /* Don't try DNS if AI_NUMERICHOST is set */
200 if (hints && hints->ai_flags & AI_NUMERICHOST)
203 hp = gethostbyname(hostname);
204 if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
205 struct addrinfo *cur, *prev;
207 cur = prev = *res = NULL;
208 for (i = 0; hp->h_addr_list[i]; i++) {
209 struct in_addr *in = (struct in_addr *)hp->h_addr_list[i];
211 cur = malloc_ai(port, in->s_addr, hints);
229 #endif /* !HAVE_GETADDRINFO */