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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/* The Inner Net License, Version 2.00
The author(s) grant permission for redistribution and use in source and
binary forms, with or without modification, of the software and documentation
provided that the following conditions are met:
0. If you receive a version of the software that is specifically labelled
as not being for redistribution (check the version message and/or README),
you are not permitted to redistribute that version of the software in any
way or form.
1. All terms of the all other applicable copyrights and licenses must be
followed.
2. Redistributions of source code must retain the authors' copyright
notice(s), this list of conditions, and the following disclaimer.
3. Redistributions in binary form must reproduce the authors' copyright
notice(s), this list of conditions, and the following disclaimer in the
documentation and/or other materials provided with the distribution.
4. All advertising materials mentioning features or use of this software
must display the following acknowledgement with the name(s) of the
authors as specified in the copyright notice(s) substituted where
indicated:
This product includes software developed by <name(s)>, The Inner
Net, and other contributors.
5. Neither the name(s) of the author(s) 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 ITS AUTHORS 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 AUTHORS 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.
If these license terms cause you a real problem, contact the author. */
/* This software is Copyright 1996 by Craig Metz, All Rights Reserved. */
#define INET6 1
#define LOCAL 1
#define HOSTTABLE 0
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#if LOCAL
#include <sys/un.h>
#include <sys/utsname.h>
#endif /* LOCAL */
#include <netdb.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#ifndef AF_LOCAL
#define AF_LOCAL AF_UNIX
#endif /* AF_LOCAL */
#if HOSTTABLE
struct hostent *_addr2hostname_hosts(const char *, int, int);
#endif /* HOSTTABLE */
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 128
#endif
#ifndef min
#define min(x,y) (((x) > (y)) ? (y) : (x))
#endif /* min */
static char *domain;
static char domainbuffer[MAXHOSTNAMELEN];
static char *
nrl_domainname (void)
{
static int first = 1;
if (first) {
char *c;
struct hostent *h;
first = 0;
if ((h = gethostbyname("localhost")) && (c = strchr(h->h_name, '.')))
return strcpy(domain = domainbuffer, ++c);
if (!gethostname(domainbuffer, sizeof(domainbuffer))) {
if (c = strchr(domainbuffer, '.'))
return (domain = ++c);
if ((h = gethostbyname(domainbuffer)) && (c = strchr(h->h_name, '.')))
return strcpy(domain = domainbuffer, ++c);
}
{
struct in_addr in_addr;
in_addr.s_addr = htonl(0x7f000001);
if ((h = gethostbyaddr((const char *)&in_addr, sizeof(struct in_addr), AF_INET)) && (c = strchr(h->h_name, '.')))
return strcpy(domain = domainbuffer, ++c);
}
return NULL;
};
return domain;
};
int getnameinfo(const struct sockaddr *sa, size_t addrlen, char *host, size_t hostlen, char *serv, size_t servlen, int flags)
{
int serrno = errno;
if (!sa)
return -1;
if (host && (hostlen > 0))
switch(sa->sa_family) {
case AF_INET:
#if INET6
case AF_INET6:
#endif /* INET6 */
if (!(flags & NI_NUMERICHOST)) {
struct hostent *h = NULL;
#if HOSTTABLE
#if INET6
if (sa->sa_family == AF_INET6)
h = _addr2hostname_hosts((void *)&(((struct sockaddr_in6 *)sa)->sin6_addr), sizeof(struct in6_addr), AF_INET6);
else
#endif /* INET6 */
h = _addr2hostname_hosts((void *)&(((struct sockaddr_in *)sa)->sin_addr), sizeof(struct in_addr), AF_INET);
#endif /* HOSTTABLE */
#if RESOLVER
if (!h) {
#if INET6
if (sa->sa_family == AF_INET6)
h = gethostbyaddr((void *)&(((struct sockaddr_in6 *)sa)->sin6_addr), sizeof(struct in6_addr), AF_INET6);
else
#endif /* INET6 */
h = gethostbyaddr((void *)&(((struct sockaddr_in *)sa)->sin_addr), sizeof(struct in_addr), AF_INET);
endhostent();
};
#endif /* RESOLVER */
if (h) {
if (flags & NI_NOFQDN) {
char *c;
if ((c = nrl_domainname()) && (c = strstr(h->h_name, c)) && (c != h->h_name) && (*(--c) == '.')) {
strncpy(host, h->h_name, min(hostlen, (c - h->h_name)));
break;
};
};
strncpy(host, h->h_name, hostlen);
break;
};
};
if (flags & NI_NAMEREQD)
goto fail;
{
const char *c;
#if INET6
if (sa->sa_family == AF_INET6)
c = inet_ntop(AF_INET6, (void *)&(((struct sockaddr_in6 *)sa)->sin6_addr), host, hostlen);
else
#endif /* INET6 */
c = inet_ntop(AF_INET, (void *)&(((struct sockaddr_in *)sa)->sin_addr), host, hostlen);
if (!c)
goto fail;
};
break;
#if LOCAL
case AF_LOCAL:
if (!(flags & NI_NUMERICHOST)) {
struct utsname utsname;
if (!uname(&utsname)) {
strncpy(host, utsname.nodename, hostlen);
break;
};
};
if (flags & NI_NAMEREQD)
goto fail;
strncpy(host, "localhost", hostlen);
break;
#endif /* LOCAL */
default:
return -1;
};
if (serv && (servlen > 0))
switch(sa->sa_family) {
case AF_INET:
#if INET6
case AF_INET6:
#endif /* INET6 */
if (!(flags & NI_NUMERICSERV)) {
struct servent *s;
if (s = getservbyport(((struct sockaddr_in *)sa)->sin_port, (flags & NI_DGRAM) ? "udp" : "tcp")) {
strncpy(serv, s->s_name, servlen);
break;
};
};
snprintf(serv, servlen, "%d", ntohs(((struct sockaddr_in *)sa)->sin_port));
break;
#if LOCAL
case AF_LOCAL:
strncpy(serv, ((struct sockaddr_un *)sa)->sun_path, servlen);
break;
#endif /* LOCAL */
};
if (host && (hostlen > 0))
host[hostlen-1] = 0;
if (serv && (servlen > 0))
serv[servlen-1] = 0;
errno = serrno;
return 0;
fail:
errno = serrno;
return -1;
};
|
