1*ebfedea0SLionel Sambuc /* $NetBSD: getnameinfo.c,v 1.1.1.1 2011/04/13 18:15:41 elric Exp $ */
2*ebfedea0SLionel Sambuc
3*ebfedea0SLionel Sambuc /*
4*ebfedea0SLionel Sambuc * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan
5*ebfedea0SLionel Sambuc * (Royal Institute of Technology, Stockholm, Sweden).
6*ebfedea0SLionel Sambuc * All rights reserved.
7*ebfedea0SLionel Sambuc *
8*ebfedea0SLionel Sambuc * Redistribution and use in source and binary forms, with or without
9*ebfedea0SLionel Sambuc * modification, are permitted provided that the following conditions
10*ebfedea0SLionel Sambuc * are met:
11*ebfedea0SLionel Sambuc *
12*ebfedea0SLionel Sambuc * 1. Redistributions of source code must retain the above copyright
13*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer.
14*ebfedea0SLionel Sambuc *
15*ebfedea0SLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
16*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer in the
17*ebfedea0SLionel Sambuc * documentation and/or other materials provided with the distribution.
18*ebfedea0SLionel Sambuc *
19*ebfedea0SLionel Sambuc * 3. Neither the name of the Institute nor the names of its contributors
20*ebfedea0SLionel Sambuc * may be used to endorse or promote products derived from this software
21*ebfedea0SLionel Sambuc * without specific prior written permission.
22*ebfedea0SLionel Sambuc *
23*ebfedea0SLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24*ebfedea0SLionel Sambuc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*ebfedea0SLionel Sambuc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*ebfedea0SLionel Sambuc * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27*ebfedea0SLionel Sambuc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*ebfedea0SLionel Sambuc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*ebfedea0SLionel Sambuc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*ebfedea0SLionel Sambuc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*ebfedea0SLionel Sambuc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*ebfedea0SLionel Sambuc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*ebfedea0SLionel Sambuc * SUCH DAMAGE.
34*ebfedea0SLionel Sambuc */
35*ebfedea0SLionel Sambuc
36*ebfedea0SLionel Sambuc #include <config.h>
37*ebfedea0SLionel Sambuc
38*ebfedea0SLionel Sambuc #include <krb5/roken.h>
39*ebfedea0SLionel Sambuc
40*ebfedea0SLionel Sambuc static int
doit(int af,const void * addr,size_t addrlen,int port,char * host,size_t hostlen,char * serv,size_t servlen,int flags)41*ebfedea0SLionel Sambuc doit (int af,
42*ebfedea0SLionel Sambuc const void *addr,
43*ebfedea0SLionel Sambuc size_t addrlen,
44*ebfedea0SLionel Sambuc int port,
45*ebfedea0SLionel Sambuc char *host, size_t hostlen,
46*ebfedea0SLionel Sambuc char *serv, size_t servlen,
47*ebfedea0SLionel Sambuc int flags)
48*ebfedea0SLionel Sambuc {
49*ebfedea0SLionel Sambuc if (host != NULL) {
50*ebfedea0SLionel Sambuc if (flags & NI_NUMERICHOST) {
51*ebfedea0SLionel Sambuc if (inet_ntop (af, addr, host, hostlen) == NULL)
52*ebfedea0SLionel Sambuc return EAI_SYSTEM;
53*ebfedea0SLionel Sambuc } else {
54*ebfedea0SLionel Sambuc struct hostent *he = gethostbyaddr (addr,
55*ebfedea0SLionel Sambuc addrlen,
56*ebfedea0SLionel Sambuc af);
57*ebfedea0SLionel Sambuc if (he != NULL) {
58*ebfedea0SLionel Sambuc strlcpy (host, hostent_find_fqdn(he), hostlen);
59*ebfedea0SLionel Sambuc if (flags & NI_NOFQDN) {
60*ebfedea0SLionel Sambuc char *dot = strchr (host, '.');
61*ebfedea0SLionel Sambuc if (dot != NULL)
62*ebfedea0SLionel Sambuc *dot = '\0';
63*ebfedea0SLionel Sambuc }
64*ebfedea0SLionel Sambuc } else if (flags & NI_NAMEREQD) {
65*ebfedea0SLionel Sambuc return EAI_NONAME;
66*ebfedea0SLionel Sambuc } else if (inet_ntop (af, addr, host, hostlen) == NULL)
67*ebfedea0SLionel Sambuc return EAI_SYSTEM;
68*ebfedea0SLionel Sambuc }
69*ebfedea0SLionel Sambuc }
70*ebfedea0SLionel Sambuc
71*ebfedea0SLionel Sambuc if (serv != NULL) {
72*ebfedea0SLionel Sambuc if (flags & NI_NUMERICSERV) {
73*ebfedea0SLionel Sambuc snprintf (serv, servlen, "%u", ntohs(port));
74*ebfedea0SLionel Sambuc } else {
75*ebfedea0SLionel Sambuc const char *proto = "tcp";
76*ebfedea0SLionel Sambuc struct servent *se;
77*ebfedea0SLionel Sambuc
78*ebfedea0SLionel Sambuc if (flags & NI_DGRAM)
79*ebfedea0SLionel Sambuc proto = "udp";
80*ebfedea0SLionel Sambuc
81*ebfedea0SLionel Sambuc se = getservbyport (port, proto);
82*ebfedea0SLionel Sambuc if (se == NULL) {
83*ebfedea0SLionel Sambuc snprintf (serv, servlen, "%u", ntohs(port));
84*ebfedea0SLionel Sambuc } else {
85*ebfedea0SLionel Sambuc strlcpy (serv, se->s_name, servlen);
86*ebfedea0SLionel Sambuc }
87*ebfedea0SLionel Sambuc }
88*ebfedea0SLionel Sambuc }
89*ebfedea0SLionel Sambuc return 0;
90*ebfedea0SLionel Sambuc }
91*ebfedea0SLionel Sambuc
92*ebfedea0SLionel Sambuc /*
93*ebfedea0SLionel Sambuc *
94*ebfedea0SLionel Sambuc */
95*ebfedea0SLionel Sambuc
96*ebfedea0SLionel Sambuc ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
getnameinfo(const struct sockaddr * sa,socklen_t salen,char * host,size_t hostlen,char * serv,size_t servlen,int flags)97*ebfedea0SLionel Sambuc getnameinfo(const struct sockaddr *sa, socklen_t salen,
98*ebfedea0SLionel Sambuc char *host, size_t hostlen,
99*ebfedea0SLionel Sambuc char *serv, size_t servlen,
100*ebfedea0SLionel Sambuc int flags)
101*ebfedea0SLionel Sambuc {
102*ebfedea0SLionel Sambuc switch (sa->sa_family) {
103*ebfedea0SLionel Sambuc #ifdef HAVE_IPV6
104*ebfedea0SLionel Sambuc case AF_INET6 : {
105*ebfedea0SLionel Sambuc const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
106*ebfedea0SLionel Sambuc
107*ebfedea0SLionel Sambuc return doit (AF_INET6, &sin6->sin6_addr, sizeof(sin6->sin6_addr),
108*ebfedea0SLionel Sambuc sin6->sin6_port,
109*ebfedea0SLionel Sambuc host, hostlen,
110*ebfedea0SLionel Sambuc serv, servlen,
111*ebfedea0SLionel Sambuc flags);
112*ebfedea0SLionel Sambuc }
113*ebfedea0SLionel Sambuc #endif
114*ebfedea0SLionel Sambuc case AF_INET : {
115*ebfedea0SLionel Sambuc const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
116*ebfedea0SLionel Sambuc
117*ebfedea0SLionel Sambuc return doit (AF_INET, &sin4->sin_addr, sizeof(sin4->sin_addr),
118*ebfedea0SLionel Sambuc sin4->sin_port,
119*ebfedea0SLionel Sambuc host, hostlen,
120*ebfedea0SLionel Sambuc serv, servlen,
121*ebfedea0SLionel Sambuc flags);
122*ebfedea0SLionel Sambuc }
123*ebfedea0SLionel Sambuc default :
124*ebfedea0SLionel Sambuc return EAI_FAMILY;
125*ebfedea0SLionel Sambuc }
126*ebfedea0SLionel Sambuc }
127