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Diffstat (limited to 'src/lib/libc/net/getnameinfo.c')
-rw-r--r--src/lib/libc/net/getnameinfo.c351
1 files changed, 0 insertions, 351 deletions
diff --git a/src/lib/libc/net/getnameinfo.c b/src/lib/libc/net/getnameinfo.c
deleted file mode 100644
index 7041a4ee48..0000000000
--- a/src/lib/libc/net/getnameinfo.c
+++ /dev/null
@@ -1,351 +0,0 @@
1/* $OpenBSD: getnameinfo.c,v 1.33 2007/02/15 04:25:35 ray Exp $ */
2/* $KAME: getnameinfo.c,v 1.45 2000/09/25 22:43:56 itojun Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * Issues to be discussed:
35 * - Thread safe-ness must be checked
36 * - RFC2553 says that we should raise error on short buffer. X/Open says
37 * we need to truncate the result. We obey RFC2553 (and X/Open should be
38 * modified). ipngwg rough consensus seems to follow RFC2553.
39 * - What is "local" in NI_FQDN?
40 * - NI_NAMEREQD and NI_NUMERICHOST conflict with each other.
41 * - (KAME extension) always attach textual scopeid (fe80::1%lo0), if
42 * sin6_scope_id is filled - standardization status?
43 * XXX breaks backward compat for code that expects no scopeid.
44 * beware on merge.
45 */
46
47#ifndef INET6
48#define INET6
49#endif
50
51#include <sys/types.h>
52#include <sys/socket.h>
53#include <net/if.h>
54#include <netinet/in.h>
55#include <arpa/inet.h>
56#include <arpa/nameser.h>
57#include <netdb.h>
58#include <resolv.h>
59#include <string.h>
60#include <stddef.h>
61
62#include "thread_private.h"
63
64static const struct afd {
65 int a_af;
66 int a_addrlen;
67 int a_socklen;
68 int a_off;
69} afdl [] = {
70#ifdef INET6
71 {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),
72 offsetof(struct sockaddr_in6, sin6_addr)},
73#endif
74 {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),
75 offsetof(struct sockaddr_in, sin_addr)},
76 {0, 0, 0},
77};
78
79struct sockinet {
80 u_char si_len;
81 u_char si_family;
82 u_short si_port;
83};
84
85#ifdef INET6
86static int ip6_parsenumeric(const struct sockaddr *, const char *, char *,
87 size_t, int);
88static int ip6_sa2str(const struct sockaddr_in6 *, char *, size_t, int);
89#endif
90
91void *__THREAD_NAME(serv_mutex);
92
93int
94getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
95 size_t hostlen, char *serv, size_t servlen, int flags)
96{
97 const struct afd *afd;
98 struct hostent *hp;
99 u_short port;
100 int family, i;
101 const char *addr;
102 u_int32_t v4a;
103 char numserv[512];
104 char numaddr[512];
105
106 if (sa == NULL)
107 return EAI_FAIL;
108
109 family = sa->sa_family;
110 for (i = 0; afdl[i].a_af; i++)
111 if (afdl[i].a_af == family) {
112 afd = &afdl[i];
113 goto found;
114 }
115 return EAI_FAMILY;
116
117 found:
118 if (salen != afd->a_socklen)
119 return EAI_FAIL;
120
121 /* network byte order */
122 port = ((const struct sockinet *)sa)->si_port;
123 addr = (const char *)sa + afd->a_off;
124
125 if (serv == NULL || servlen == 0) {
126 /*
127 * do nothing in this case.
128 * in case you are wondering if "&&" is more correct than
129 * "||" here: rfc2553bis-03 says that serv == NULL OR
130 * servlen == 0 means that the caller does not want the result.
131 */
132 } else if (!(flags & NI_NUMERICSERV)) {
133 struct servent sp;
134 struct servent_data sd;
135
136 (void)memset(&sd, 0, sizeof(sd));
137 if (getservbyport_r(port,
138 (flags & NI_DGRAM) ? "udp" : "tcp", &sp, &sd) == -1)
139 goto numeric;
140
141 if (strlen(sp.s_name) + 1 > servlen) {
142 endservent_r(&sd);
143 return EAI_MEMORY;
144 }
145 strlcpy(serv, sp.s_name, servlen);
146 endservent_r(&sd);
147 } else {
148 numeric:
149 i = snprintf(numserv, sizeof(numserv), "%u", ntohs(port));
150 if (i < 0 || i >= servlen || i >= sizeof(numserv))
151 return EAI_MEMORY;
152 strlcpy(serv, numserv, servlen);
153 }
154
155 switch (sa->sa_family) {
156 case AF_INET:
157 v4a = (u_int32_t)
158 ntohl(((const struct sockaddr_in *)sa)->sin_addr.s_addr);
159 if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
160 flags |= NI_NUMERICHOST;
161 v4a >>= IN_CLASSA_NSHIFT;
162 if (v4a == 0)
163 flags |= NI_NUMERICHOST;
164 break;
165#ifdef INET6
166 case AF_INET6:
167 {
168 const struct sockaddr_in6 *sin6;
169 sin6 = (const struct sockaddr_in6 *)sa;
170 switch (sin6->sin6_addr.s6_addr[0]) {
171 case 0x00:
172 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
173 ;
174 else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
175 ;
176 else
177 flags |= NI_NUMERICHOST;
178 break;
179 default:
180 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
181 flags |= NI_NUMERICHOST;
182 }
183 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
184 flags |= NI_NUMERICHOST;
185 break;
186 }
187 }
188 break;
189#endif
190 }
191 if (host == NULL || hostlen == 0) {
192 /*
193 * do nothing in this case.
194 * in case you are wondering if "&&" is more correct than
195 * "||" here: rfc2553bis-03 says that host == NULL or
196 * hostlen == 0 means that the caller does not want the result.
197 */
198 } else if (flags & NI_NUMERICHOST) {
199 int numaddrlen;
200
201 /* NUMERICHOST and NAMEREQD conflicts with each other */
202 if (flags & NI_NAMEREQD)
203 return EAI_NONAME;
204
205 switch(afd->a_af) {
206#ifdef INET6
207 case AF_INET6:
208 {
209 int error;
210
211 if ((error = ip6_parsenumeric(sa, addr, host,
212 hostlen, flags)) != 0)
213 return(error);
214 break;
215 }
216#endif
217 default:
218 if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr))
219 == NULL)
220 return EAI_SYSTEM;
221 numaddrlen = strlen(numaddr);
222 if (numaddrlen + 1 > hostlen) /* don't forget terminator */
223 return EAI_MEMORY;
224 strlcpy(host, numaddr, hostlen);
225 break;
226 }
227 } else {
228 _THREAD_PRIVATE_MUTEX_LOCK(serv_mutex);
229 hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af);
230 _THREAD_PRIVATE_MUTEX_UNLOCK(serv_mutex);
231
232 if (hp) {
233#if 0
234 /*
235 * commented out, since "for local host" is not
236 * implemented here - see RFC2553 p30
237 */
238 if (flags & NI_NOFQDN) {
239 char *p;
240 p = strchr(hp->h_name, '.');
241 if (p)
242 *p = '\0';
243 }
244#endif
245 if (strlen(hp->h_name) + 1 > hostlen) {
246 return EAI_MEMORY;
247 }
248 strlcpy(host, hp->h_name, hostlen);
249 } else {
250 if (flags & NI_NAMEREQD)
251 return EAI_NONAME;
252 switch(afd->a_af) {
253#ifdef INET6
254 case AF_INET6:
255 {
256 int error;
257
258 if ((error = ip6_parsenumeric(sa, addr, host,
259 hostlen,
260 flags)) != 0)
261 return(error);
262 break;
263 }
264#endif
265 default:
266 if (inet_ntop(afd->a_af, addr, host,
267 hostlen) == NULL)
268 return EAI_SYSTEM;
269 break;
270 }
271 }
272 }
273 return(0);
274}
275
276#ifdef INET6
277static int
278ip6_parsenumeric(const struct sockaddr *sa, const char *addr, char *host,
279 size_t hostlen, int flags)
280{
281 int numaddrlen;
282 char numaddr[512];
283
284 if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL)
285 return EAI_SYSTEM;
286
287 numaddrlen = strlen(numaddr);
288 if (numaddrlen + 1 > hostlen) /* don't forget terminator */
289 return EAI_MEMORY;
290 strlcpy(host, numaddr, hostlen);
291
292 if (((const struct sockaddr_in6 *)sa)->sin6_scope_id) {
293 char zonebuf[MAXHOSTNAMELEN];
294 int zonelen;
295
296 zonelen = ip6_sa2str(
297 (const struct sockaddr_in6 *)(const void *)sa,
298 zonebuf, sizeof(zonebuf), flags);
299 if (zonelen < 0)
300 return EAI_MEMORY;
301 if (zonelen + 1 + numaddrlen + 1 > hostlen)
302 return EAI_MEMORY;
303
304 /* construct <numeric-addr><delim><zoneid> */
305 memcpy(host + numaddrlen + 1, zonebuf,
306 (size_t)zonelen);
307 host[numaddrlen] = SCOPE_DELIMITER;
308 host[numaddrlen + 1 + zonelen] = '\0';
309 }
310
311 return 0;
312}
313
314/* ARGSUSED */
315static int
316ip6_sa2str(const struct sockaddr_in6 *sa6, char *buf, size_t bufsiz, int flags)
317{
318 unsigned int ifindex;
319 const struct in6_addr *a6;
320 int n;
321
322 ifindex = (unsigned int)sa6->sin6_scope_id;
323 a6 = &sa6->sin6_addr;
324
325#ifdef notdef
326 if ((flags & NI_NUMERICSCOPE) != 0) {
327 n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);
328 if (n < 0 || n >= bufsiz)
329 return -1;
330 else
331 return n;
332 }
333#endif
334
335 /* if_indextoname() does not take buffer size. not a good api... */
336 if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6) ||
337 IN6_IS_ADDR_MC_INTFACELOCAL(a6)) && bufsiz >= IF_NAMESIZE) {
338 char *p = if_indextoname(ifindex, buf);
339 if (p) {
340 return(strlen(p));
341 }
342 }
343
344 /* last resort */
345 n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);
346 if (n < 0 || n >= bufsiz)
347 return -1;
348 else
349 return n;
350}
351#endif /* INET6 */
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