2 * Copyright (C) 2000-2003 Damien Miller. All rights reserved.
3 * Copyright (C) 1999 WIDE Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
31 * Pseudo-implementation of RFC2553 name / address resolution functions
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.
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
46 #ifndef HAVE_GETNAMEINFO
47 int getnameinfo(const struct sockaddr *sa, size_t salen, char *host,
48 size_t hostlen, char *serv, size_t servlen, int flags)
50 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
55 snprintf(tmpserv, sizeof(tmpserv), "%d", ntohs(sin->sin_port));
56 if (strlcpy(serv, tmpserv, servlen) >= servlen)
61 if (flags & NI_NUMERICHOST) {
62 if (strlcpy(host, inet_ntoa(sin->sin_addr),
68 hp = gethostbyaddr((char *)&sin->sin_addr,
69 sizeof(struct in_addr), AF_INET);
73 if (strlcpy(host, hp->h_name, hostlen) >= hostlen)
81 #endif /* !HAVE_GETNAMEINFO */
83 #ifndef HAVE_GAI_STRERROR
84 #ifdef HAVE_CONST_GAI_STRERROR_PROTO
93 return ("no address associated with name");
95 return ("memory allocation failure.");
97 return ("nodename nor servname provided, or not known");
99 return ("unknown/invalid error.");
102 #endif /* !HAVE_GAI_STRERROR */
104 #ifndef HAVE_FREEADDRINFO
106 freeaddrinfo(struct addrinfo *ai)
108 struct addrinfo *next;
116 #endif /* !HAVE_FREEADDRINFO */
118 #ifndef HAVE_GETADDRINFO
120 addrinfo *malloc_ai(int port, u_long addr, const struct addrinfo *hints)
124 ai = malloc(sizeof(*ai) + sizeof(struct sockaddr_in));
128 memset(ai, '\0', sizeof(*ai) + sizeof(struct sockaddr_in));
130 ai->ai_addr = (struct sockaddr *)(ai + 1);
131 /* XXX -- ssh doesn't use sa_len */
132 ai->ai_addrlen = sizeof(struct sockaddr_in);
133 ai->ai_addr->sa_family = ai->ai_family = AF_INET;
135 ((struct sockaddr_in *)(ai)->ai_addr)->sin_port = port;
136 ((struct sockaddr_in *)(ai)->ai_addr)->sin_addr.s_addr = addr;
138 /* XXX: the following is not generally correct, but does what we want */
139 if (hints->ai_socktype)
140 ai->ai_socktype = hints->ai_socktype;
142 ai->ai_socktype = SOCK_STREAM;
144 if (hints->ai_protocol)
145 ai->ai_protocol = hints->ai_protocol;
151 getaddrinfo(const char *hostname, const char *servname,
152 const struct addrinfo *hints, struct addrinfo **res)
162 if (servname != NULL) {
165 port = strtol(servname, &cp, 10);
166 if (port > 0 && port <= 65535 && *cp == '\0')
168 else if ((sp = getservbyname(servname, NULL)) != NULL)
174 if (hints && hints->ai_flags & AI_PASSIVE) {
175 addr = htonl(0x00000000);
176 if (hostname && inet_aton(hostname, &in) != 0)
178 *res = malloc_ai(port, addr, hints);
185 *res = malloc_ai(port, htonl(0x7f000001), hints);
191 if (inet_aton(hostname, &in)) {
192 *res = malloc_ai(port, in.s_addr, hints);
198 /* Don't try DNS if AI_NUMERICHOST is set */
199 if (hints && hints->ai_flags & AI_NUMERICHOST)
202 hp = gethostbyname(hostname);
203 if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
204 struct addrinfo *cur, *prev;
206 cur = prev = *res = NULL;
207 for (i = 0; hp->h_addr_list[i]; i++) {
208 struct in_addr *in = (struct in_addr *)hp->h_addr_list[i];
210 cur = malloc_ai(port, in->s_addr, hints);
228 #endif /* !HAVE_GETADDRINFO */