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