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3bdf9aae | 1 | /* $NetBSD: getnameinfo.c,v 1.45 2006/10/15 16:14:46 christos Exp $ */\r |
2 | /* $KAME: getnameinfo.c,v 1.45 2000/09/25 22:43:56 itojun Exp $ */\r | |
3 | \r | |
4 | /*\r | |
5 | * Copyright (c) 2000 Ben Harris.\r | |
6 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.\r | |
7 | * All rights reserved.\r | |
8 | *\r | |
9 | * Redistribution and use in source and binary forms, with or without\r | |
10 | * modification, are permitted provided that the following conditions\r | |
11 | * are met:\r | |
12 | * 1. Redistributions of source code must retain the above copyright\r | |
13 | * notice, this list of conditions and the following disclaimer.\r | |
14 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
15 | * notice, this list of conditions and the following disclaimer in the\r | |
16 | * documentation and/or other materials provided with the distribution.\r | |
17 | * 3. Neither the name of the project nor the names of its contributors\r | |
18 | * may be used to endorse or promote products derived from this software\r | |
19 | * without specific prior written permission.\r | |
20 | *\r | |
21 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND\r | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE\r | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
31 | * SUCH DAMAGE.\r | |
32 | */\r | |
33 | \r | |
34 | /*\r | |
35 | * Issues to be discussed:\r | |
36 | * - Thread safe-ness must be checked\r | |
37 | * - RFC2553 says that we should raise error on short buffer. X/Open says\r | |
38 | * we need to truncate the result. We obey RFC2553 (and X/Open should be\r | |
39 | * modified). ipngwg rough consensus seems to follow RFC2553.\r | |
40 | * - What is "local" in NI_FQDN?\r | |
41 | * - NI_NAMEREQD and NI_NUMERICHOST conflict with each other.\r | |
42 | * - (KAME extension) always attach textual scopeid (fe80::1%lo0), if\r | |
43 | * sin6_scope_id is filled - standardization status?\r | |
44 | * XXX breaks backward compat for code that expects no scopeid.\r | |
45 | * beware on merge.\r | |
46 | */\r | |
47 | \r | |
48 | #define INET6 1\r | |
49 | \r | |
50 | #include <sys/cdefs.h>\r | |
51 | #if defined(LIBC_SCCS) && !defined(lint)\r | |
52 | __RCSID("$NetBSD: getnameinfo.c,v 1.45 2006/10/15 16:14:46 christos Exp $");\r | |
53 | #endif /* LIBC_SCCS and not lint */\r | |
54 | \r | |
55 | #include "namespace.h"\r | |
56 | #include <sys/types.h>\r | |
57 | #include <sys/socket.h>\r | |
58 | #include <net/if.h>\r | |
59 | #include <net/if_dl.h>\r | |
60 | //#include <net/if_ieee1394.h>\r | |
61 | //#include <net/if_types.h>\r | |
62 | #include <netinet/in.h>\r | |
63 | #include <arpa/inet.h>\r | |
64 | #include <arpa/nameser.h>\r | |
65 | #include <assert.h>\r | |
66 | #include <limits.h>\r | |
67 | #include <netdb.h>\r | |
68 | #include <resolv.h>\r | |
69 | #include <stddef.h>\r | |
70 | #include <string.h>\r | |
71 | \r | |
72 | #include <net/servent.h>\r | |
73 | \r | |
74 | #define CLLADDR(x) ( LLADDR(x) )\r | |
75 | #define endservent_r(svd) endservent()\r | |
76 | #define getservbyport_r(Port,pProto,pSv,pSvd) getservbyport(Port,pProto)\r | |
77 | \r | |
78 | #ifdef __weak_alias\r | |
79 | __weak_alias(getnameinfo,_getnameinfo)\r | |
80 | #endif\r | |
81 | \r | |
82 | static\r | |
83 | int\r | |
84 | hexname(\r | |
85 | const u_int8_t * cp,\r | |
86 | size_t len,\r | |
87 | char * host,\r | |
88 | socklen_t hostlen\r | |
89 | );\r | |
90 | \r | |
91 | static const struct afd {\r | |
92 | int a_af;\r | |
93 | socklen_t a_addrlen;\r | |
94 | socklen_t a_socklen;\r | |
95 | int a_off;\r | |
96 | } afdl [] = {\r | |
97 | #ifdef INET6\r | |
98 | {PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),\r | |
99 | offsetof(struct sockaddr_in6, sin6_addr)},\r | |
100 | #endif\r | |
101 | {PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),\r | |
102 | offsetof(struct sockaddr_in, sin_addr)},\r | |
103 | {0, 0, 0, 0},\r | |
104 | };\r | |
105 | \r | |
106 | struct sockinet {\r | |
107 | u_char si_len;\r | |
108 | u_char si_family;\r | |
109 | u_short si_port;\r | |
110 | };\r | |
111 | \r | |
112 | static int getnameinfo_inet __P((const struct sockaddr *, socklen_t, char *,\r | |
113 | socklen_t, char *, socklen_t, int));\r | |
114 | #ifdef INET6\r | |
115 | static int ip6_parsenumeric __P((const struct sockaddr *, const char *, char *,\r | |
116 | socklen_t, int));\r | |
117 | static int ip6_sa2str __P((const struct sockaddr_in6 *, char *, size_t,\r | |
118 | int));\r | |
119 | #endif\r | |
120 | static int getnameinfo_link __P((const struct sockaddr *, socklen_t, char *,\r | |
121 | socklen_t, char *, socklen_t, int));\r | |
122 | static int hexname __P((const u_int8_t *, size_t, char *, socklen_t));\r | |
123 | \r | |
124 | /*\r | |
125 | * Top-level getnameinfo() code. Look at the address family, and pick an\r | |
126 | * appropriate function to call.\r | |
127 | */\r | |
128 | int\r | |
129 | getnameinfo(\r | |
130 | const struct sockaddr * sa,\r | |
131 | socklen_t salen,\r | |
132 | char * host,\r | |
133 | socklen_t hostlen,\r | |
134 | char * serv,\r | |
135 | socklen_t servlen,\r | |
136 | int flags\r | |
137 | )\r | |
138 | {\r | |
139 | \r | |
140 | switch (sa->sa_family) {\r | |
141 | case AF_INET:\r | |
142 | case AF_INET6:\r | |
143 | return getnameinfo_inet(sa, salen, host, hostlen,\r | |
144 | serv, servlen, flags);\r | |
145 | case AF_LINK:\r | |
146 | return getnameinfo_link(sa, salen, host, hostlen,\r | |
147 | serv, servlen, flags);\r | |
148 | default:\r | |
149 | return EAI_FAMILY;\r | |
150 | }\r | |
151 | }\r | |
152 | \r | |
153 | \r | |
154 | /*\r | |
155 | * getnameinfo_inet():\r | |
156 | * Format an IPv4 or IPv6 sockaddr into a printable string.\r | |
157 | */\r | |
158 | static\r | |
159 | int\r | |
160 | getnameinfo_inet(\r | |
161 | const struct sockaddr * sa,\r | |
162 | socklen_t salen,\r | |
163 | char * host,\r | |
164 | socklen_t hostlen,\r | |
165 | char * serv,\r | |
166 | socklen_t servlen,\r | |
167 | int flags\r | |
168 | )\r | |
169 | {\r | |
170 | const struct afd *afd;\r | |
171 | struct servent *sp;\r | |
172 | struct hostent *hp;\r | |
173 | u_short port;\r | |
174 | int family, i;\r | |
175 | const char *addr;\r | |
176 | u_int32_t v4a;\r | |
177 | char numserv[512];\r | |
178 | char numaddr[512];\r | |
179 | \r | |
180 | /* sa is checked below */\r | |
181 | /* host may be NULL */\r | |
182 | /* serv may be NULL */\r | |
183 | \r | |
184 | if (sa == NULL)\r | |
185 | return EAI_FAIL;\r | |
186 | \r | |
187 | #ifdef BSD4_4\r | |
188 | if (sa->sa_len != salen)\r | |
189 | return EAI_FAIL;\r | |
190 | #endif\r | |
191 | \r | |
192 | family = sa->sa_family;\r | |
193 | for (i = 0; afdl[i].a_af; i++)\r | |
194 | if (afdl[i].a_af == family) {\r | |
195 | afd = &afdl[i];\r | |
196 | goto found;\r | |
197 | }\r | |
198 | return EAI_FAMILY;\r | |
199 | \r | |
200 | found:\r | |
201 | if (salen != afd->a_socklen)\r | |
202 | return EAI_FAIL;\r | |
203 | \r | |
204 | /* network byte order */\r | |
205 | port = ((const struct sockinet *)(const void *)sa)->si_port;\r | |
206 | addr = (const char *)(const void *)sa + afd->a_off;\r | |
207 | \r | |
208 | if (serv == NULL || servlen == 0) {\r | |
209 | /*\r | |
210 | * do nothing in this case.\r | |
211 | * in case you are wondering if "&&" is more correct than\r | |
212 | * "||" here: rfc2553bis-03 says that serv == NULL OR\r | |
213 | * servlen == 0 means that the caller does not want the result.\r | |
214 | */\r | |
215 | } else {\r | |
216 | if (flags & NI_NUMERICSERV)\r | |
217 | sp = NULL;\r | |
218 | else {\r | |
219 | struct servent_data svd;\r | |
220 | // struct servent sv;\r | |
221 | \r | |
222 | (void)memset(&svd, 0, sizeof(svd));\r | |
223 | sp = getservbyport_r(port,\r | |
224 | (flags & NI_DGRAM) ? "udp" : "tcp", &sv, &svd);\r | |
225 | endservent_r(&svd);\r | |
226 | }\r | |
227 | if (sp) {\r | |
228 | if (strlen(sp->s_name) + 1 > servlen)\r | |
229 | return EAI_MEMORY;\r | |
230 | strlcpy(serv, sp->s_name, servlen);\r | |
231 | } else {\r | |
232 | snprintf(numserv, sizeof(numserv), "%u", ntohs(port));\r | |
233 | if (strlen(numserv) + 1 > servlen)\r | |
234 | return EAI_MEMORY;\r | |
235 | strlcpy(serv, numserv, servlen);\r | |
236 | }\r | |
237 | }\r | |
238 | \r | |
239 | switch (sa->sa_family) {\r | |
240 | case AF_INET:\r | |
241 | v4a = (u_int32_t)\r | |
242 | ntohl(((const struct sockaddr_in *)\r | |
243 | (const void *)sa)->sin_addr.s_addr);\r | |
244 | if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))\r | |
245 | flags |= NI_NUMERICHOST;\r | |
246 | v4a >>= IN_CLASSA_NSHIFT;\r | |
247 | if (v4a == 0)\r | |
248 | flags |= NI_NUMERICHOST;\r | |
249 | break;\r | |
250 | #ifdef INET6\r | |
251 | case AF_INET6:\r | |
252 | {\r | |
253 | const struct sockaddr_in6 *sin6;\r | |
254 | sin6 = (const struct sockaddr_in6 *)(const void *)sa;\r | |
255 | switch (sin6->sin6_addr.s6_addr[0]) {\r | |
256 | case 0x00:\r | |
257 | if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))\r | |
258 | ;\r | |
259 | else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))\r | |
260 | ;\r | |
261 | else\r | |
262 | flags |= NI_NUMERICHOST;\r | |
263 | break;\r | |
264 | default:\r | |
265 | if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {\r | |
266 | flags |= NI_NUMERICHOST;\r | |
267 | }\r | |
268 | else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))\r | |
269 | flags |= NI_NUMERICHOST;\r | |
270 | break;\r | |
271 | }\r | |
272 | }\r | |
273 | break;\r | |
274 | #endif\r | |
275 | }\r | |
276 | if (host == NULL || hostlen == 0) {\r | |
277 | /*\r | |
278 | * do nothing in this case.\r | |
279 | * in case you are wondering if "&&" is more correct than\r | |
280 | * "||" here: rfc2553bis-03 says that host == NULL or\r | |
281 | * hostlen == 0 means that the caller does not want the result.\r | |
282 | */\r | |
283 | } else if (flags & NI_NUMERICHOST) {\r | |
284 | size_t numaddrlen;\r | |
285 | \r | |
286 | /* NUMERICHOST and NAMEREQD conflicts with each other */\r | |
287 | if (flags & NI_NAMEREQD)\r | |
288 | return EAI_NONAME;\r | |
289 | \r | |
290 | switch(afd->a_af) {\r | |
291 | #ifdef INET6\r | |
292 | case AF_INET6:\r | |
293 | {\r | |
294 | int error;\r | |
295 | \r | |
296 | if ((error = ip6_parsenumeric(sa, addr, host,\r | |
297 | hostlen, flags)) != 0)\r | |
298 | return(error);\r | |
299 | break;\r | |
300 | }\r | |
301 | #endif\r | |
302 | default:\r | |
303 | if (inet_ntop(afd->a_af, addr, numaddr, sizeof(numaddr))\r | |
304 | == NULL)\r | |
305 | return EAI_SYSTEM;\r | |
306 | numaddrlen = strlen(numaddr);\r | |
307 | if (numaddrlen + 1 > hostlen) /* don't forget terminator */\r | |
308 | return EAI_MEMORY;\r | |
309 | strlcpy(host, numaddr, hostlen);\r | |
310 | break;\r | |
311 | }\r | |
312 | } else {\r | |
313 | hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af);\r | |
314 | \r | |
315 | if (hp) {\r | |
316 | #if 0\r | |
317 | /*\r | |
318 | * commented out, since "for local host" is not\r | |
319 | * implemented here - see RFC2553 p30\r | |
320 | */\r | |
321 | if (flags & NI_NOFQDN) {\r | |
322 | char *p;\r | |
323 | p = strchr(hp->h_name, '.');\r | |
324 | if (p)\r | |
325 | *p = '\0';\r | |
326 | }\r | |
327 | #endif\r | |
328 | if (strlen(hp->h_name) + 1 > hostlen) {\r | |
329 | return EAI_MEMORY;\r | |
330 | }\r | |
331 | strlcpy(host, hp->h_name, hostlen);\r | |
332 | } else {\r | |
333 | if (flags & NI_NAMEREQD)\r | |
334 | return EAI_NONAME;\r | |
335 | switch(afd->a_af) {\r | |
336 | #ifdef INET6\r | |
337 | case AF_INET6:\r | |
338 | {\r | |
339 | int error;\r | |
340 | \r | |
341 | if ((error = ip6_parsenumeric(sa, addr, host,\r | |
342 | hostlen,\r | |
343 | flags)) != 0)\r | |
344 | return(error);\r | |
345 | break;\r | |
346 | }\r | |
347 | #endif\r | |
348 | default:\r | |
349 | if (inet_ntop(afd->a_af, addr, host,\r | |
350 | hostlen) == NULL)\r | |
351 | return EAI_SYSTEM;\r | |
352 | break;\r | |
353 | }\r | |
354 | }\r | |
355 | }\r | |
356 | return(0);\r | |
357 | }\r | |
358 | \r | |
359 | #ifdef INET6\r | |
360 | static int\r | |
361 | ip6_parsenumeric(\r | |
362 | const struct sockaddr *sa,\r | |
363 | const char *addr,\r | |
364 | char *host,\r | |
365 | socklen_t hostlen,\r | |
366 | int flags\r | |
367 | )\r | |
368 | {\r | |
369 | size_t numaddrlen;\r | |
370 | char numaddr[512];\r | |
371 | \r | |
372 | _DIAGASSERT(sa != NULL);\r | |
373 | _DIAGASSERT(addr != NULL);\r | |
374 | _DIAGASSERT(host != NULL);\r | |
375 | \r | |
376 | if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL)\r | |
377 | return EAI_SYSTEM;\r | |
378 | \r | |
379 | numaddrlen = strlen(numaddr);\r | |
380 | if (numaddrlen + 1 > hostlen) /* don't forget terminator */\r | |
381 | return EAI_OVERFLOW;\r | |
382 | strlcpy(host, numaddr, hostlen);\r | |
383 | \r | |
384 | if (((const struct sockaddr_in6 *)(const void *)sa)->sin6_scope_id) {\r | |
385 | char zonebuf[MAXHOSTNAMELEN];\r | |
386 | int zonelen;\r | |
387 | \r | |
388 | zonelen = ip6_sa2str(\r | |
389 | (const struct sockaddr_in6 *)(const void *)sa,\r | |
390 | zonebuf, sizeof(zonebuf), flags);\r | |
391 | if (zonelen < 0)\r | |
392 | return EAI_OVERFLOW;\r | |
393 | if ((size_t) zonelen + 1 + numaddrlen + 1 > hostlen)\r | |
394 | return EAI_OVERFLOW;\r | |
395 | /* construct <numeric-addr><delim><zoneid> */\r | |
396 | memcpy(host + numaddrlen + 1, zonebuf,\r | |
397 | (size_t)zonelen);\r | |
398 | host[numaddrlen] = SCOPE_DELIMITER;\r | |
399 | host[numaddrlen + 1 + zonelen] = '\0';\r | |
400 | }\r | |
401 | \r | |
402 | return 0;\r | |
403 | }\r | |
404 | \r | |
405 | /* ARGSUSED */\r | |
406 | static int\r | |
407 | ip6_sa2str(\r | |
408 | const struct sockaddr_in6 *sa6,\r | |
409 | char *buf,\r | |
410 | size_t bufsiz,\r | |
411 | int flags\r | |
412 | )\r | |
413 | {\r | |
414 | unsigned int ifindex;\r | |
415 | const struct in6_addr *a6;\r | |
416 | int n;\r | |
417 | \r | |
418 | _DIAGASSERT(sa6 != NULL);\r | |
419 | _DIAGASSERT(buf != NULL);\r | |
420 | \r | |
421 | ifindex = (unsigned int)sa6->sin6_scope_id;\r | |
422 | a6 = &sa6->sin6_addr;\r | |
423 | \r | |
424 | #ifdef NI_NUMERICSCOPE\r | |
425 | if ((flags & NI_NUMERICSCOPE) != 0) {\r | |
426 | n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);\r | |
427 | if ((n < 0) || ((size_t)n >= bufsiz))\r | |
428 | return -1;\r | |
429 | else\r | |
430 | return n;\r | |
431 | }\r | |
432 | #endif\r | |
433 | \r | |
434 | #if 0\r | |
435 | /* if_indextoname() does not take buffer size. not a good api... */\r | |
436 | if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6)) &&\r | |
437 | bufsiz >= IF_NAMESIZE) {\r | |
438 | char *p = if_indextoname(ifindex, buf);\r | |
439 | if (p) {\r | |
440 | return(strlen(p));\r | |
441 | }\r | |
442 | }\r | |
443 | #endif // 0\r | |
444 | \r | |
445 | /* last resort */\r | |
446 | n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);\r | |
447 | if (n < 0 || (size_t) n >= bufsiz)\r | |
448 | return -1;\r | |
449 | else\r | |
450 | return n;\r | |
451 | }\r | |
452 | #endif /* INET6 */\r | |
453 | \r | |
454 | \r | |
455 | /*\r | |
456 | * getnameinfo_link():\r | |
457 | * Format a link-layer address into a printable format, paying attention to\r | |
458 | * the interface type.\r | |
459 | */\r | |
460 | /* ARGSUSED */\r | |
461 | static\r | |
462 | int\r | |
463 | getnameinfo_link (\r | |
464 | const struct sockaddr * sa,\r | |
465 | socklen_t salen,\r | |
466 | char * host,\r | |
467 | socklen_t hostlen,\r | |
468 | char * serv,\r | |
469 | socklen_t servlen,\r | |
470 | int flags\r | |
471 | )\r | |
472 | {\r | |
473 | const struct sockaddr_dl *sdl =\r | |
474 | (const struct sockaddr_dl *)(const void *)sa;\r | |
475 | // const struct ieee1394_hwaddr *iha;\r | |
476 | int n;\r | |
477 | \r | |
478 | if (serv != NULL && servlen > 0)\r | |
479 | *serv = '\0';\r | |
480 | \r | |
481 | if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 && sdl->sdl_slen == 0) {\r | |
482 | n = snprintf(host, hostlen, "link#%u", sdl->sdl_index);\r | |
483 | if (n < 0 || (socklen_t) n > hostlen) {\r | |
484 | *host = '\0';\r | |
485 | return EAI_MEMORY;\r | |
486 | }\r | |
487 | return 0;\r | |
488 | }\r | |
489 | \r | |
490 | #if 0\r | |
491 | switch (sdl->sdl_type) {\r | |
492 | #ifdef IFT_ECONET\r | |
493 | case IFT_ECONET:\r | |
494 | if (sdl->sdl_alen < 2)\r | |
495 | return EAI_FAMILY;\r | |
496 | if (CLLADDR(sdl)[1] == 0)\r | |
497 | n = snprintf(host, hostlen, "%u", CLLADDR(sdl)[0]);\r | |
498 | else\r | |
499 | n = snprintf(host, hostlen, "%u.%u",\r | |
500 | CLLADDR(sdl)[1], CLLADDR(sdl)[0]);\r | |
501 | if (n < 0 || (socklen_t) n >= hostlen) {\r | |
502 | *host = '\0';\r | |
503 | return EAI_MEMORY;\r | |
504 | } else\r | |
505 | return 0;\r | |
506 | #endif\r | |
507 | case IFT_IEEE1394:\r | |
508 | if (sdl->sdl_alen < sizeof(iha->iha_uid))\r | |
509 | return EAI_FAMILY;\r | |
510 | iha =\r | |
511 | (const struct ieee1394_hwaddr *)(const void *)CLLADDR(sdl);\r | |
512 | return hexname(iha->iha_uid, sizeof(iha->iha_uid),\r | |
513 | host, hostlen);\r | |
514 | /*\r | |
515 | * The following have zero-length addresses.\r | |
516 | * IFT_ATM (net/if_atmsubr.c)\r | |
517 | * IFT_FAITH (net/if_faith.c)\r | |
518 | * IFT_GIF (net/if_gif.c)\r | |
519 | * IFT_LOOP (net/if_loop.c)\r | |
520 | * IFT_PPP (net/if_ppp.c, net/if_spppsubr.c)\r | |
521 | * IFT_SLIP (net/if_sl.c, net/if_strip.c)\r | |
522 | * IFT_STF (net/if_stf.c)\r | |
523 | * IFT_L2VLAN (net/if_vlan.c)\r | |
524 | * IFT_PROPVIRTUAL (net/if_bridge.h>\r | |
525 | */\r | |
526 | /*\r | |
527 | * The following use IPv4 addresses as link-layer addresses:\r | |
528 | * IFT_OTHER (net/if_gre.c)\r | |
529 | */\r | |
530 | case IFT_ARCNET: /* default below is believed correct for all these. */\r | |
531 | case IFT_ETHER:\r | |
532 | case IFT_FDDI:\r | |
533 | case IFT_HIPPI:\r | |
534 | case IFT_ISO88025:\r | |
535 | default:\r | |
536 | #endif // 0\r | |
537 | return hexname((const u_int8_t *)CLLADDR(sdl),\r | |
538 | (size_t)sdl->sdl_alen, host, hostlen);\r | |
539 | // }\r | |
540 | }\r | |
541 | \r | |
542 | static\r | |
543 | int\r | |
544 | hexname(\r | |
545 | const u_int8_t * cp,\r | |
546 | size_t len,\r | |
547 | char * host,\r | |
548 | socklen_t hostlen\r | |
549 | )\r | |
550 | {\r | |
551 | int n;\r | |
552 | size_t i;\r | |
553 | char *outp = host;\r | |
554 | \r | |
555 | *outp = '\0';\r | |
556 | for (i = 0; i < len; i++) {\r | |
557 | n = snprintf(outp, hostlen, "%s%02x",\r | |
558 | i ? ":" : "", cp[i]);\r | |
559 | if (n < 0 || (socklen_t) n >= hostlen) {\r | |
560 | *host = '\0';\r | |
561 | return EAI_MEMORY;\r | |
562 | }\r | |
563 | outp += n;\r | |
564 | hostlen -= n;\r | |
565 | }\r | |
566 | return 0;\r | |
567 | }\r |