1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
/*
* Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
RCSID("$Id: getnameinfo.c 15412 2005-06-16 16:53:09Z lha $");
#endif
#include <roken.h>
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)
{
if (host != NULL) {
if (flags & NI_NUMERICHOST) {
if (inet_ntop (af, addr, host, hostlen) == NULL)
return EAI_SYSTEM;
} else {
struct hostent *he = gethostbyaddr (addr,
addrlen,
af);
if (he != NULL) {
strlcpy (host, hostent_find_fqdn(he), hostlen);
if (flags & NI_NOFQDN) {
char *dot = strchr (host, '.');
if (dot != NULL)
*dot = '\0';
}
} else if (flags & NI_NAMEREQD) {
return EAI_NONAME;
} else if (inet_ntop (af, addr, host, hostlen) == NULL)
return EAI_SYSTEM;
}
}
if (serv != NULL) {
if (flags & NI_NUMERICSERV) {
snprintf (serv, servlen, "%u", ntohs(port));
} else {
const char *proto = "tcp";
struct servent *se;
if (flags & NI_DGRAM)
proto = "udp";
se = getservbyport (port, proto);
if (se == NULL) {
snprintf (serv, servlen, "%u", ntohs(port));
} else {
strlcpy (serv, se->s_name, servlen);
}
}
}
return 0;
}
/*
*
*/
int ROKEN_LIB_FUNCTION
getnameinfo(const struct sockaddr *sa, socklen_t salen,
char *host, size_t hostlen,
char *serv, size_t servlen,
int flags)
{
switch (sa->sa_family) {
#ifdef HAVE_IPV6
case AF_INET6 : {
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
return doit (AF_INET6, &sin6->sin6_addr, sizeof(sin6->sin6_addr),
sin6->sin6_port,
host, hostlen,
serv, servlen,
flags);
}
#endif
case AF_INET : {
const struct sockaddr_in *sin4 = (const struct sockaddr_in *)sa;
return doit (AF_INET, &sin4->sin_addr, sizeof(sin4->sin_addr),
sin4->sin_port,
host, hostlen,
serv, servlen,
flags);
}
default :
return EAI_FAMILY;
}
}
|
