1 : /*
2 : +----------------------------------------------------------------------+
3 : | PHP Version 5 |
4 : +----------------------------------------------------------------------+
5 : | Copyright (c) 1997-2007 The PHP Group |
6 : +----------------------------------------------------------------------+
7 : | This source file is subject to version 3.01 of the PHP license, |
8 : | that is bundled with this package in the file LICENSE, and is |
9 : | available through the world-wide-web at the following url: |
10 : | http://www.php.net/license/3_01.txt |
11 : | If you did not receive a copy of the PHP license and are unable to |
12 : | obtain it through the world-wide-web, please send a note to |
13 : | license@php.net so we can mail you a copy immediately. |
14 : +----------------------------------------------------------------------+
15 : | Authors: The typical suspects |
16 : | Pollita <pollita@php.net> |
17 : | Marcus Boerger <helly@php.net> |
18 : +----------------------------------------------------------------------+
19 : */
20 :
21 : /* $Id: dns.c,v 1.70.2.7.2.2 2007/02/24 02:17:27 helly Exp $ */
22 :
23 : /* {{{ includes */
24 : #include "php.h"
25 :
26 : #if HAVE_SYS_SOCKET_H
27 : #include <sys/socket.h>
28 : #endif
29 :
30 : #ifdef PHP_WIN32
31 : #if HAVE_LIBBIND
32 : #ifndef WINNT
33 : #define WINNT 1
34 : #endif
35 : /* located in www.php.net/extra/bindlib.zip */
36 : #if HAVE_ARPA_INET_H
37 : #include "arpa/inet.h"
38 : #endif
39 : #include "netdb.h"
40 : #if HAVE_ARPA_NAMESERV_H
41 : #include "arpa/nameser.h"
42 : #endif
43 : #if HAVE_RESOLV_H
44 : #include "resolv.h"
45 : #endif
46 : #endif /* HAVE_LIBBIND */
47 : #include <winsock2.h>
48 : #else /* This holds good for NetWare too, both for Winsock and Berkeley sockets */
49 : #include <netinet/in.h>
50 : #if HAVE_ARPA_INET_H
51 : #include <arpa/inet.h>
52 : #endif
53 : #include <netdb.h>
54 : #ifdef _OSD_POSIX
55 : #undef STATUS
56 : #undef T_UNSPEC
57 : #endif
58 : #if HAVE_ARPA_NAMESER_H
59 : #include <arpa/nameser.h>
60 : #endif
61 : #if HAVE_RESOLV_H
62 : #include <resolv.h>
63 : #endif
64 : #endif
65 :
66 : /* Borrowed from SYS/SOCKET.H */
67 : #if defined(NETWARE) && defined(USE_WINSOCK)
68 : #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
69 : #endif
70 :
71 : #include "dns.h"
72 :
73 : /* type compat */
74 : #ifndef DNS_T_A
75 : #define DNS_T_A 1
76 : #endif
77 : #ifndef DNS_T_NS
78 : #define DNS_T_NS 2
79 : #endif
80 : #ifndef DNS_T_CNAME
81 : #define DNS_T_CNAME 5
82 : #endif
83 : #ifndef DNS_T_SOA
84 : #define DNS_T_SOA 6
85 : #endif
86 : #ifndef DNS_T_PTR
87 : #define DNS_T_PTR 12
88 : #endif
89 : #ifndef DNS_T_HINFO
90 : #define DNS_T_HINFO 13
91 : #endif
92 : #ifndef DNS_T_MINFO
93 : #define DNS_T_MINFO 14
94 : #endif
95 : #ifndef DNS_T_MX
96 : #define DNS_T_MX 15
97 : #endif
98 : #ifndef DNS_T_TXT
99 : #define DNS_T_TXT 16
100 : #endif
101 : #ifndef DNS_T_AAAA
102 : #define DNS_T_AAAA 28
103 : #endif
104 : #ifndef DNS_T_SRV
105 : #define DNS_T_SRV 33
106 : #endif
107 : #ifndef DNS_T_NAPTR
108 : #define DNS_T_NAPTR 35
109 : #endif
110 : #ifndef DNS_T_A6
111 : #define DNS_T_A6 38
112 : #endif
113 :
114 : #ifndef DNS_T_ANY
115 : #define DNS_T_ANY 255
116 : #endif
117 : /* }}} */
118 :
119 : static char *php_gethostbyaddr(char *ip);
120 : static char *php_gethostbyname(char *name);
121 :
122 : /* {{{ proto string gethostbyaddr(string ip_address)
123 : Get the Internet host name corresponding to a given IP address */
124 : PHP_FUNCTION(gethostbyaddr)
125 0 : {
126 : zval **arg;
127 : char *addr;
128 :
129 0 : if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
130 0 : ZEND_WRONG_PARAM_COUNT();
131 : }
132 :
133 0 : convert_to_string_ex(arg);
134 :
135 0 : addr = php_gethostbyaddr(Z_STRVAL_PP(arg));
136 :
137 0 : if (addr == NULL) {
138 : #if HAVE_IPV6 && HAVE_INET_PTON
139 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "Address is not a valid IPv4 or IPv6 address");
140 : #else
141 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "Address is not in a.b.c.d form");
142 : #endif
143 0 : RETVAL_FALSE;
144 : } else {
145 0 : RETVAL_STRING(addr, 0);
146 : }
147 : }
148 : /* }}} */
149 :
150 : /* {{{ php_gethostbyaddr */
151 : static char *php_gethostbyaddr(char *ip)
152 0 : {
153 : #if HAVE_IPV6 && HAVE_INET_PTON
154 : struct in6_addr addr6;
155 : #endif
156 : struct in_addr addr;
157 : struct hostent *hp;
158 :
159 : #if HAVE_IPV6 && HAVE_INET_PTON
160 0 : if (inet_pton(AF_INET6, ip, &addr6)) {
161 0 : hp = gethostbyaddr((char *) &addr6, sizeof(addr6), AF_INET6);
162 0 : } else if (inet_pton(AF_INET, ip, &addr)) {
163 0 : hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
164 : } else {
165 0 : return NULL;
166 : }
167 : #else
168 : addr.s_addr = inet_addr(ip);
169 :
170 : if (addr.s_addr == -1) {
171 : return NULL;
172 : }
173 :
174 : hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
175 : #endif
176 :
177 0 : if (!hp || hp->h_name == NULL || hp->h_name[0] == '\0') {
178 0 : return estrdup(ip);
179 : }
180 :
181 0 : return estrdup(hp->h_name);
182 : }
183 : /* }}} */
184 :
185 : /* {{{ proto string gethostbyname(string hostname)
186 : Get the IP address corresponding to a given Internet host name */
187 : PHP_FUNCTION(gethostbyname)
188 0 : {
189 : zval **arg;
190 :
191 0 : if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
192 0 : ZEND_WRONG_PARAM_COUNT();
193 : }
194 :
195 0 : convert_to_string_ex(arg);
196 :
197 0 : RETVAL_STRING(php_gethostbyname(Z_STRVAL_PP(arg)), 0);
198 : }
199 : /* }}} */
200 :
201 : /* {{{ proto array gethostbynamel(string hostname)
202 : Return a list of IP addresses that a given hostname resolves to. */
203 : PHP_FUNCTION(gethostbynamel)
204 0 : {
205 : zval **arg;
206 : struct hostent *hp;
207 : struct in_addr in;
208 : int i;
209 :
210 0 : if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
211 0 : ZEND_WRONG_PARAM_COUNT();
212 : }
213 0 : convert_to_string_ex(arg);
214 :
215 0 : hp = gethostbyname(Z_STRVAL_PP(arg));
216 0 : if (hp == NULL || hp->h_addr_list == NULL) {
217 0 : RETURN_FALSE;
218 : }
219 :
220 0 : array_init(return_value);
221 :
222 0 : for (i = 0 ; hp->h_addr_list[i] != 0 ; i++) {
223 0 : in = *(struct in_addr *) hp->h_addr_list[i];
224 0 : add_next_index_string(return_value, inet_ntoa(in), 1);
225 : }
226 : }
227 : /* }}} */
228 :
229 : /* {{{ php_gethostbyname */
230 : static char *php_gethostbyname(char *name)
231 0 : {
232 : struct hostent *hp;
233 : struct in_addr in;
234 :
235 0 : hp = gethostbyname(name);
236 :
237 0 : if (!hp || !*(hp->h_addr_list)) {
238 0 : return estrdup(name);
239 : }
240 :
241 0 : memcpy(&in.s_addr, *(hp->h_addr_list), sizeof(in.s_addr));
242 :
243 0 : return estrdup(inet_ntoa(in));
244 : }
245 : /* }}} */
246 :
247 : #if HAVE_RES_SEARCH && !(defined(__BEOS__)||defined(PHP_WIN32) || defined(NETWARE))
248 :
249 : /* {{{ proto int dns_check_record(string host [, string type])
250 : Check DNS records corresponding to a given Internet host name or IP address */
251 : PHP_FUNCTION(dns_check_record)
252 0 : {
253 : zval **arg1, **arg2;
254 : int type, i;
255 : #ifndef MAXPACKET
256 : #define MAXPACKET 8192 /* max packet size used internally by BIND */
257 : #endif
258 : u_char ans[MAXPACKET];
259 :
260 0 : switch (ZEND_NUM_ARGS()) {
261 : case 1:
262 0 : if (zend_get_parameters_ex(1, &arg1) == FAILURE) {
263 0 : WRONG_PARAM_COUNT;
264 : }
265 0 : type = T_MX;
266 0 : convert_to_string_ex(arg1);
267 0 : break;
268 :
269 : case 2:
270 0 : if (zend_get_parameters_ex(2, &arg1, &arg2) == FAILURE) {
271 0 : WRONG_PARAM_COUNT;
272 : }
273 0 : convert_to_string_ex(arg1);
274 0 : convert_to_string_ex(arg2);
275 :
276 0 : if (!strcasecmp("A", Z_STRVAL_PP(arg2))) type = T_A;
277 0 : else if (!strcasecmp("NS", Z_STRVAL_PP(arg2))) type = DNS_T_NS;
278 0 : else if (!strcasecmp("MX", Z_STRVAL_PP(arg2))) type = DNS_T_MX;
279 0 : else if (!strcasecmp("PTR", Z_STRVAL_PP(arg2))) type = DNS_T_PTR;
280 0 : else if (!strcasecmp("ANY", Z_STRVAL_PP(arg2))) type = DNS_T_ANY;
281 0 : else if (!strcasecmp("SOA", Z_STRVAL_PP(arg2))) type = DNS_T_SOA;
282 0 : else if (!strcasecmp("CNAME", Z_STRVAL_PP(arg2))) type = DNS_T_CNAME;
283 0 : else if (!strcasecmp("AAAA", Z_STRVAL_PP(arg2))) type = DNS_T_AAAA;
284 0 : else if (!strcasecmp("SRV", Z_STRVAL_PP(arg2))) type = DNS_T_SRV;
285 0 : else if (!strcasecmp("NAPTR", Z_STRVAL_PP(arg2))) type = DNS_T_NAPTR;
286 0 : else if (!strcasecmp("A6", Z_STRVAL_PP(arg2))) type = DNS_T_A6;
287 : else {
288 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "Type '%s' not supported", Z_STRVAL_PP(arg2));
289 0 : RETURN_FALSE;
290 : }
291 0 : break;
292 :
293 : default:
294 0 : WRONG_PARAM_COUNT;
295 : }
296 :
297 0 : i = res_search(Z_STRVAL_PP(arg1), C_IN, type, ans, sizeof(ans));
298 :
299 0 : if (i < 0) {
300 0 : RETURN_FALSE;
301 : }
302 :
303 0 : RETURN_TRUE;
304 : }
305 : /* }}} */
306 :
307 : #if HAVE_DNS_FUNCS
308 :
309 : #define PHP_DNS_NUM_TYPES 12 /* Number of DNS Types Supported by PHP currently */
310 :
311 : #define PHP_DNS_A 0x00000001
312 : #define PHP_DNS_NS 0x00000002
313 : #define PHP_DNS_CNAME 0x00000010
314 : #define PHP_DNS_SOA 0x00000020
315 : #define PHP_DNS_PTR 0x00000800
316 : #define PHP_DNS_HINFO 0x00001000
317 : #define PHP_DNS_MX 0x00004000
318 : #define PHP_DNS_TXT 0x00008000
319 : #define PHP_DNS_A6 0x01000000
320 : #define PHP_DNS_SRV 0x02000000
321 : #define PHP_DNS_NAPTR 0x04000000
322 : #define PHP_DNS_AAAA 0x08000000
323 : #define PHP_DNS_ANY 0x10000000
324 : #define PHP_DNS_ALL (PHP_DNS_A|PHP_DNS_NS|PHP_DNS_CNAME|PHP_DNS_SOA|PHP_DNS_PTR|PHP_DNS_HINFO|PHP_DNS_MX|PHP_DNS_TXT|PHP_DNS_A6|PHP_DNS_SRV|PHP_DNS_NAPTR|PHP_DNS_AAAA)
325 :
326 220 : PHP_MINIT_FUNCTION(dns) {
327 220 : REGISTER_LONG_CONSTANT("DNS_A", PHP_DNS_A, CONST_CS | CONST_PERSISTENT);
328 220 : REGISTER_LONG_CONSTANT("DNS_NS", PHP_DNS_NS, CONST_CS | CONST_PERSISTENT);
329 220 : REGISTER_LONG_CONSTANT("DNS_CNAME", PHP_DNS_CNAME, CONST_CS | CONST_PERSISTENT);
330 220 : REGISTER_LONG_CONSTANT("DNS_SOA", PHP_DNS_SOA, CONST_CS | CONST_PERSISTENT);
331 220 : REGISTER_LONG_CONSTANT("DNS_PTR", PHP_DNS_PTR, CONST_CS | CONST_PERSISTENT);
332 220 : REGISTER_LONG_CONSTANT("DNS_HINFO", PHP_DNS_HINFO, CONST_CS | CONST_PERSISTENT);
333 220 : REGISTER_LONG_CONSTANT("DNS_MX", PHP_DNS_MX, CONST_CS | CONST_PERSISTENT);
334 220 : REGISTER_LONG_CONSTANT("DNS_TXT", PHP_DNS_TXT, CONST_CS | CONST_PERSISTENT);
335 220 : REGISTER_LONG_CONSTANT("DNS_SRV", PHP_DNS_SRV, CONST_CS | CONST_PERSISTENT);
336 220 : REGISTER_LONG_CONSTANT("DNS_NAPTR", PHP_DNS_NAPTR, CONST_CS | CONST_PERSISTENT);
337 220 : REGISTER_LONG_CONSTANT("DNS_AAAA", PHP_DNS_AAAA, CONST_CS | CONST_PERSISTENT);
338 220 : REGISTER_LONG_CONSTANT("DNS_A6", PHP_DNS_A6, CONST_CS | CONST_PERSISTENT);
339 220 : REGISTER_LONG_CONSTANT("DNS_ANY", PHP_DNS_ANY, CONST_CS | CONST_PERSISTENT);
340 220 : REGISTER_LONG_CONSTANT("DNS_ALL", PHP_DNS_ALL, CONST_CS | CONST_PERSISTENT);
341 220 : return SUCCESS;
342 : }
343 :
344 : #ifndef HFIXEDSZ
345 : #define HFIXEDSZ 12 /* fixed data in header <arpa/nameser.h> */
346 : #endif /* HFIXEDSZ */
347 :
348 : #ifndef QFIXEDSZ
349 : #define QFIXEDSZ 4 /* fixed data in query <arpa/nameser.h> */
350 : #endif /* QFIXEDSZ */
351 :
352 : #undef MAXHOSTNAMELEN
353 : #define MAXHOSTNAMELEN 1024
354 :
355 : #ifndef MAXRESOURCERECORDS
356 : #define MAXRESOURCERECORDS 64
357 : #endif /* MAXRESOURCERECORDS */
358 :
359 : typedef union {
360 : HEADER qb1;
361 : u_char qb2[65536];
362 : } querybuf;
363 :
364 : /* just a hack to free resources allocated by glibc in __res_nsend()
365 : * See also:
366 : * res_thread_freeres() in glibc/resolv/res_init.c
367 : * __libc_res_nsend() in resolv/res_send.c
368 : * */
369 :
370 : #ifdef __GLIBC__
371 : #define php_dns_free_res(__res__) _php_dns_free_res(__res__)
372 0 : static void _php_dns_free_res(struct __res_state res) { /* {{{ */
373 : int ns;
374 0 : for (ns = 0; ns < MAXNS; ns++) {
375 0 : if (res._u._ext.nsaddrs[ns] != NULL) {
376 0 : free (res._u._ext.nsaddrs[ns]);
377 0 : res._u._ext.nsaddrs[ns] = NULL;
378 : }
379 : }
380 0 : } /* }}} */
381 : #else
382 : #define php_dns_free_res(__res__)
383 : #endif
384 :
385 : /* {{{ php_parserr */
386 : static u_char *php_parserr(u_char *cp, querybuf *answer, int type_to_fetch, int store, zval **subarray)
387 0 : {
388 : u_short type, class, dlen;
389 : u_long ttl;
390 : long n, i;
391 : u_short s;
392 : u_char *tp, *p;
393 : char name[MAXHOSTNAMELEN];
394 0 : int have_v6_break = 0, in_v6_break = 0;
395 :
396 0 : *subarray = NULL;
397 :
398 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, sizeof(name) - 2);
399 0 : if (n < 0) {
400 0 : return NULL;
401 : }
402 0 : cp += n;
403 :
404 0 : GETSHORT(type, cp);
405 0 : GETSHORT(class, cp);
406 0 : GETLONG(ttl, cp);
407 0 : GETSHORT(dlen, cp);
408 0 : if (type_to_fetch != T_ANY && type != type_to_fetch) {
409 0 : cp += dlen;
410 0 : return cp;
411 : }
412 :
413 0 : if (!store) {
414 0 : cp += dlen;
415 0 : return cp;
416 : }
417 :
418 0 : ALLOC_INIT_ZVAL(*subarray);
419 0 : array_init(*subarray);
420 :
421 0 : add_assoc_string(*subarray, "host", name, 1);
422 0 : switch (type) {
423 : case DNS_T_A:
424 0 : add_assoc_string(*subarray, "type", "A", 1);
425 0 : snprintf(name, sizeof(name), "%d.%d.%d.%d", cp[0], cp[1], cp[2], cp[3]);
426 0 : add_assoc_string(*subarray, "ip", name, 1);
427 0 : cp += dlen;
428 0 : break;
429 : case DNS_T_MX:
430 0 : add_assoc_string(*subarray, "type", "MX", 1);
431 0 : GETSHORT(n, cp);
432 0 : add_assoc_long(*subarray, "pri", n);
433 : /* no break; */
434 : case DNS_T_CNAME:
435 0 : if (type == DNS_T_CNAME)
436 0 : add_assoc_string(*subarray, "type", "CNAME", 1);
437 : /* no break; */
438 : case DNS_T_NS:
439 0 : if (type == DNS_T_NS)
440 0 : add_assoc_string(*subarray, "type", "NS", 1);
441 : /* no break; */
442 : case DNS_T_PTR:
443 0 : if (type == DNS_T_PTR)
444 0 : add_assoc_string(*subarray, "type", "PTR", 1);
445 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, (sizeof name) - 2);
446 0 : if (n < 0) {
447 0 : return NULL;
448 : }
449 0 : cp += n;
450 0 : add_assoc_string(*subarray, "target", name, 1);
451 0 : break;
452 : case DNS_T_HINFO:
453 : /* See RFC 1010 for values */
454 0 : add_assoc_string(*subarray, "type", "HINFO", 1);
455 0 : n = *cp & 0xFF;
456 0 : cp++;
457 0 : add_assoc_stringl(*subarray, "cpu", cp, n, 1);
458 0 : cp += n;
459 0 : n = *cp & 0xFF;
460 0 : cp++;
461 0 : add_assoc_stringl(*subarray, "os", cp, n, 1);
462 0 : cp += n;
463 0 : break;
464 : case DNS_T_TXT:
465 0 : add_assoc_string(*subarray, "type", "TXT", 1);
466 0 : n = cp[0];
467 0 : tp = emalloc(n + 1);
468 0 : memcpy(tp, cp + 1, n);
469 0 : tp[n] = '\0';
470 0 : cp += dlen;
471 0 : add_assoc_stringl(*subarray, "txt", tp, n, 0);
472 0 : break;
473 : case DNS_T_SOA:
474 0 : add_assoc_string(*subarray, "type", "SOA", 1);
475 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, (sizeof name) -2);
476 0 : if (n < 0) {
477 0 : return NULL;
478 : }
479 0 : cp += n;
480 0 : add_assoc_string(*subarray, "mname", name, 1);
481 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, (sizeof name) -2);
482 0 : if (n < 0) {
483 0 : return NULL;
484 : }
485 0 : cp += n;
486 0 : add_assoc_string(*subarray, "rname", name, 1);
487 0 : GETLONG(n, cp);
488 0 : add_assoc_long(*subarray, "serial", n);
489 0 : GETLONG(n, cp);
490 0 : add_assoc_long(*subarray, "refresh", n);
491 0 : GETLONG(n, cp);
492 0 : add_assoc_long(*subarray, "retry", n);
493 0 : GETLONG(n, cp);
494 0 : add_assoc_long(*subarray, "expire", n);
495 0 : GETLONG(n, cp);
496 0 : add_assoc_long(*subarray, "minimum-ttl", n);
497 0 : break;
498 : case DNS_T_AAAA:
499 0 : tp = name;
500 0 : for(i=0; i < 8; i++) {
501 0 : GETSHORT(s, cp);
502 0 : if (s != 0) {
503 0 : if (tp > (u_char *)name) {
504 0 : in_v6_break = 0;
505 0 : tp[0] = ':';
506 0 : tp++;
507 : }
508 0 : tp += sprintf(tp,"%x",s);
509 : } else {
510 0 : if (!have_v6_break) {
511 0 : have_v6_break = 1;
512 0 : in_v6_break = 1;
513 0 : tp[0] = ':';
514 0 : tp++;
515 0 : } else if (!in_v6_break) {
516 0 : tp[0] = ':';
517 0 : tp++;
518 0 : tp[0] = '0';
519 0 : tp++;
520 : }
521 : }
522 : }
523 0 : if (have_v6_break && in_v6_break) {
524 0 : tp[0] = ':';
525 0 : tp++;
526 : }
527 0 : tp[0] = '\0';
528 0 : add_assoc_string(*subarray, "type", "AAAA", 1);
529 0 : add_assoc_string(*subarray, "ipv6", name, 1);
530 0 : break;
531 : case DNS_T_A6:
532 0 : p = cp;
533 0 : add_assoc_string(*subarray, "type", "A6", 1);
534 0 : n = ((int)cp[0]) & 0xFF;
535 0 : cp++;
536 0 : add_assoc_long(*subarray, "masklen", n);
537 0 : tp = name;
538 0 : if (n > 15) {
539 0 : have_v6_break = 1;
540 0 : in_v6_break = 1;
541 0 : tp[0] = ':';
542 0 : tp++;
543 : }
544 0 : if (n % 16 > 8) {
545 : /* Partial short */
546 0 : if (cp[0] != 0) {
547 0 : if (tp > (u_char *)name) {
548 0 : in_v6_break = 0;
549 0 : tp[0] = ':';
550 0 : tp++;
551 : }
552 0 : sprintf(tp, "%x", cp[0] & 0xFF);
553 : } else {
554 0 : if (!have_v6_break) {
555 0 : have_v6_break = 1;
556 0 : in_v6_break = 1;
557 0 : tp[0] = ':';
558 0 : tp++;
559 0 : } else if (!in_v6_break) {
560 0 : tp[0] = ':';
561 0 : tp++;
562 0 : tp[0] = '0';
563 0 : tp++;
564 : }
565 : }
566 0 : cp++;
567 : }
568 0 : for(i = (n+8)/16; i < 8; i++) {
569 0 : GETSHORT(s, cp);
570 0 : if (s != 0) {
571 0 : if (tp > (u_char *)name) {
572 0 : in_v6_break = 0;
573 0 : tp[0] = ':';
574 0 : tp++;
575 : }
576 0 : tp += sprintf(tp,"%x",s);
577 : } else {
578 0 : if (!have_v6_break) {
579 0 : have_v6_break = 1;
580 0 : in_v6_break = 1;
581 0 : tp[0] = ':';
582 0 : tp++;
583 0 : } else if (!in_v6_break) {
584 0 : tp[0] = ':';
585 0 : tp++;
586 0 : tp[0] = '0';
587 0 : tp++;
588 : }
589 : }
590 : }
591 0 : if (have_v6_break && in_v6_break) {
592 0 : tp[0] = ':';
593 0 : tp++;
594 : }
595 0 : tp[0] = '\0';
596 0 : add_assoc_string(*subarray, "ipv6", name, 1);
597 0 : if (cp < p + dlen) {
598 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, (sizeof name) - 2);
599 0 : if (n < 0) {
600 0 : return NULL;
601 : }
602 0 : cp += n;
603 0 : add_assoc_string(*subarray, "chain", name, 1);
604 : }
605 0 : break;
606 : case DNS_T_SRV:
607 0 : add_assoc_string(*subarray, "type", "SRV", 1);
608 0 : GETSHORT(n, cp);
609 0 : add_assoc_long(*subarray, "pri", n);
610 0 : GETSHORT(n, cp);
611 0 : add_assoc_long(*subarray, "weight", n);
612 0 : GETSHORT(n, cp);
613 0 : add_assoc_long(*subarray, "port", n);
614 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, (sizeof name) - 2);
615 0 : if (n < 0) {
616 0 : return NULL;
617 : }
618 0 : cp += n;
619 0 : add_assoc_string(*subarray, "target", name, 1);
620 0 : break;
621 : case DNS_T_NAPTR:
622 0 : add_assoc_string(*subarray, "type", "NAPTR", 1);
623 0 : GETSHORT(n, cp);
624 0 : add_assoc_long(*subarray, "order", n);
625 0 : GETSHORT(n, cp);
626 0 : add_assoc_long(*subarray, "pref", n);
627 0 : n = (cp[0] & 0xFF);
628 0 : add_assoc_stringl(*subarray, "flags", ++cp, n, 1);
629 0 : cp += n;
630 0 : n = (cp[0] & 0xFF);
631 0 : add_assoc_stringl(*subarray, "services", ++cp, n, 1);
632 0 : cp += n;
633 0 : n = (cp[0] & 0xFF);
634 0 : add_assoc_stringl(*subarray, "regex", ++cp, n, 1);
635 0 : cp += n;
636 0 : n = dn_expand(answer->qb2, answer->qb2+65536, cp, name, (sizeof name) - 2);
637 0 : if (n < 0) {
638 0 : return NULL;
639 : }
640 0 : cp += n;
641 0 : add_assoc_string(*subarray, "replacement", name, 1);
642 0 : break;
643 : default:
644 0 : cp += dlen;
645 : }
646 :
647 0 : add_assoc_string(*subarray, "class", "IN", 1);
648 0 : add_assoc_long(*subarray, "ttl", ttl);
649 :
650 0 : return cp;
651 : }
652 : /* }}} */
653 :
654 : /* {{{ proto array|false dns_get_record(string hostname [, int type[, array authns, array addtl]])
655 : Get any Resource Record corresponding to a given Internet host name */
656 : PHP_FUNCTION(dns_get_record)
657 0 : {
658 : zval *addtl, *host, *authns, *fetch_type;
659 0 : int addtl_recs = 0;
660 0 : int type_to_fetch, type_param = PHP_DNS_ANY;
661 : struct __res_state res;
662 : HEADER *hp;
663 : querybuf buf, answer;
664 0 : u_char *cp = NULL, *end = NULL;
665 0 : int n, qd, an, ns = 0, ar = 0;
666 0 : int type, first_query = 1, store_results = 1;
667 :
668 0 : switch (ZEND_NUM_ARGS()) {
669 : case 1:
670 0 : if (zend_get_parameters(ht, 1, &host) == FAILURE) {
671 0 : WRONG_PARAM_COUNT;
672 : }
673 0 : break;
674 : case 2:
675 0 : if (zend_get_parameters(ht, 2, &host, &fetch_type) == FAILURE) {
676 0 : WRONG_PARAM_COUNT;
677 : }
678 0 : convert_to_long(fetch_type);
679 0 : type_param = Z_LVAL_P(fetch_type);
680 0 : break;
681 : case 4:
682 0 : if (zend_get_parameters(ht, 4, &host, &fetch_type, &authns, &addtl) == FAILURE) {
683 0 : WRONG_PARAM_COUNT;
684 : }
685 0 : convert_to_long(fetch_type);
686 0 : type_param = Z_LVAL_P(fetch_type);
687 0 : zval_dtor(authns);
688 0 : addtl_recs = 1; /* We want the additional Records */
689 0 : array_init(authns);
690 0 : zval_dtor(addtl);
691 0 : array_init(addtl);
692 0 : break;
693 : default:
694 0 : WRONG_PARAM_COUNT;
695 : }
696 :
697 0 : convert_to_string(host);
698 :
699 0 : if (type_param&~PHP_DNS_ALL && type_param!=PHP_DNS_ANY) {
700 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "Type '%d' not supported", type_param);
701 0 : RETURN_FALSE;
702 : }
703 :
704 : /* Initialize the return array */
705 0 : array_init(return_value);
706 :
707 : /* - We emulate an or'ed type mask by querying type by type. (Steps 0 - NUMTYPES-1 )
708 : * If additional info is wanted we check again with DNS_T_ANY (step NUMTYPES / NUMTYPES+1 )
709 : * store_results is used to skip storing the results retrieved in step
710 : * NUMTYPES+1 when results were already fetched.
711 : * - In case of PHP_DNS_ANY we use the directly fetch DNS_T_ANY. (step NUMTYPES+1 )
712 : */
713 0 : for(type = (type_param==PHP_DNS_ANY ? (PHP_DNS_NUM_TYPES + 1) : 0); type < (addtl_recs ? (PHP_DNS_NUM_TYPES + 2) : PHP_DNS_NUM_TYPES) || first_query; type++)
714 : {
715 0 : first_query = 0;
716 0 : switch (type) {
717 : case 0:
718 0 : type_to_fetch = type_param&PHP_DNS_A ? DNS_T_A : 0;
719 0 : break;
720 : case 1:
721 0 : type_to_fetch = type_param&PHP_DNS_NS ? DNS_T_NS : 0;
722 0 : break;
723 : case 2:
724 0 : type_to_fetch = type_param&PHP_DNS_CNAME ? DNS_T_CNAME : 0;
725 0 : break;
726 : case 3:
727 0 : type_to_fetch = type_param&PHP_DNS_SOA ? DNS_T_SOA : 0;
728 0 : break;
729 : case 4:
730 0 : type_to_fetch = type_param&PHP_DNS_PTR ? DNS_T_PTR : 0;
731 0 : break;
732 : case 5:
733 0 : type_to_fetch = type_param&PHP_DNS_HINFO ? DNS_T_HINFO : 0;
734 0 : break;
735 : case 6:
736 0 : type_to_fetch = type_param&PHP_DNS_MX ? DNS_T_MX : 0;
737 0 : break;
738 : case 7:
739 0 : type_to_fetch = type_param&PHP_DNS_TXT ? DNS_T_TXT : 0;
740 0 : break;
741 : case 8:
742 0 : type_to_fetch = type_param&PHP_DNS_AAAA ? DNS_T_AAAA : 0;
743 0 : break;
744 : case 9:
745 0 : type_to_fetch = type_param&PHP_DNS_SRV ? DNS_T_SRV : 0;
746 0 : break;
747 : case 10:
748 0 : type_to_fetch = type_param&PHP_DNS_NAPTR ? DNS_T_NAPTR : 0;
749 0 : break;
750 : case 11:
751 0 : type_to_fetch = type_param&PHP_DNS_A6 ? DNS_T_A6 : 0;
752 0 : break;
753 : case PHP_DNS_NUM_TYPES:
754 0 : store_results = 0;
755 0 : continue;
756 : default:
757 : case (PHP_DNS_NUM_TYPES + 1):
758 0 : type_to_fetch = DNS_T_ANY;
759 : break;
760 : }
761 0 : if (type_to_fetch) {
762 0 : memset(&res, 0, sizeof(res));
763 0 : res_ninit(&res);
764 0 : res.retrans = 5;
765 0 : res.options &= ~RES_DEFNAMES;
766 :
767 0 : n = res_nmkquery(&res, QUERY, Z_STRVAL_P(host), C_IN, type_to_fetch, NULL, 0, NULL, buf.qb2, sizeof buf);
768 0 : if (n<0) {
769 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "res_nmkquery() failed");
770 0 : zval_dtor(return_value);
771 0 : res_nclose(&res);
772 0 : php_dns_free_res(res);
773 0 : RETURN_FALSE;
774 : }
775 0 : n = res_nsend(&res, buf.qb2, n, answer.qb2, sizeof answer);
776 0 : if (n<0) {
777 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "res_nsend() failed");
778 0 : zval_dtor(return_value);
779 0 : res_nclose(&res);
780 0 : php_dns_free_res(res);
781 0 : RETURN_FALSE;
782 : }
783 :
784 0 : cp = answer.qb2 + HFIXEDSZ;
785 0 : end = answer.qb2 + n;
786 0 : hp = (HEADER *)&answer;
787 0 : qd = ntohs(hp->qdcount);
788 0 : an = ntohs(hp->ancount);
789 0 : ns = ntohs(hp->nscount);
790 0 : ar = ntohs(hp->arcount);
791 :
792 : /* Skip QD entries, they're only used by dn_expand later on */
793 0 : while (qd-- > 0) {
794 0 : n = dn_skipname(cp, end);
795 0 : if (n < 0) {
796 0 : php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to parse DNS data received");
797 0 : zval_dtor(return_value);
798 0 : res_nclose(&res);
799 0 : php_dns_free_res(res);
800 0 : RETURN_FALSE;
801 : }
802 0 : cp += n + QFIXEDSZ;
803 : }
804 :
805 : /* YAY! Our real answers! */
806 0 : while (an-- && cp && cp < end) {
807 : zval *retval;
808 :
809 0 : cp = php_parserr(cp, &answer, type_to_fetch, store_results, &retval);
810 0 : if (retval != NULL && store_results) {
811 0 : add_next_index_zval(return_value, retval);
812 : }
813 : }
814 0 : res_nclose(&res);
815 0 : php_dns_free_res(res);
816 : }
817 : }
818 :
819 0 : if (addtl_recs) {
820 : /* List of Authoritative Name Servers */
821 0 : while (ns-- > 0 && cp && cp < end) {
822 : zval *retval;
823 :
824 0 : cp = php_parserr(cp, &answer, DNS_T_ANY, 1, &retval);
825 0 : if (retval != NULL) {
826 0 : add_next_index_zval(authns, retval);
827 : }
828 : }
829 : /* Additional records associated with authoritative name servers */
830 0 : while (ar-- > 0 && cp && cp < end) {
831 : zval *retval;
832 :
833 0 : cp = php_parserr(cp, &answer, DNS_T_ANY, 1, &retval);
834 0 : if (retval != NULL) {
835 0 : add_next_index_zval(addtl, retval);
836 : }
837 : }
838 : }
839 : }
840 : /* }}} */
841 : #endif /* HAVE_DNS_FUNCS */
842 :
843 : #if HAVE_DN_SKIPNAME && HAVE_DN_EXPAND
844 : /* {{{ proto bool dns_get_mx(string hostname, array mxhosts [, array weight])
845 : Get MX records corresponding to a given Internet host name */
846 : PHP_FUNCTION(dns_get_mx)
847 0 : {
848 : zval *host, *mx_list, *weight_list;
849 0 : int need_weight = 0;
850 : int count, qdc;
851 : u_short type, weight;
852 : u_char ans[MAXPACKET];
853 : char buf[MAXHOSTNAMELEN];
854 : HEADER *hp;
855 : u_char *cp, *end;
856 : int i;
857 :
858 0 : switch (ZEND_NUM_ARGS()) {
859 : case 2:
860 0 : if (zend_get_parameters(ht, 2, &host, &mx_list) == FAILURE) {
861 0 : WRONG_PARAM_COUNT;
862 : }
863 0 : break;
864 :
865 : case 3:
866 0 : if (zend_get_parameters(ht, 3, &host, &mx_list, &weight_list) == FAILURE) {
867 0 : WRONG_PARAM_COUNT;
868 : }
869 0 : need_weight = 1;
870 0 : zval_dtor(weight_list); /* start with clean array */
871 0 : array_init(weight_list);
872 0 : break;
873 :
874 : default:
875 0 : WRONG_PARAM_COUNT;
876 : }
877 :
878 0 : convert_to_string(host);
879 0 : zval_dtor(mx_list); /* start with clean array */
880 0 : array_init(mx_list);
881 :
882 : /* Go! */
883 0 : i = res_search(Z_STRVAL_P(host), C_IN, DNS_T_MX, (u_char *)&ans, sizeof(ans));
884 0 : if (i < 0) {
885 0 : RETURN_FALSE;
886 : }
887 0 : if (i > (int)sizeof(ans)) {
888 0 : i = sizeof(ans);
889 : }
890 0 : hp = (HEADER *)&ans;
891 0 : cp = (u_char *)&ans + HFIXEDSZ;
892 0 : end = (u_char *)&ans +i;
893 0 : for (qdc = ntohs((unsigned short)hp->qdcount); qdc--; cp += i + QFIXEDSZ) {
894 0 : if ((i = dn_skipname(cp, end)) < 0 ) {
895 0 : RETURN_FALSE;
896 : }
897 : }
898 0 : count = ntohs((unsigned short)hp->ancount);
899 0 : while (--count >= 0 && cp < end) {
900 0 : if ((i = dn_skipname(cp, end)) < 0 ) {
901 0 : RETURN_FALSE;
902 : }
903 0 : cp += i;
904 0 : GETSHORT(type, cp);
905 0 : cp += INT16SZ + INT32SZ;
906 0 : GETSHORT(i, cp);
907 0 : if (type != DNS_T_MX) {
908 0 : cp += i;
909 0 : continue;
910 : }
911 0 : GETSHORT(weight, cp);
912 0 : if ((i = dn_expand(ans, end, cp, buf, sizeof(buf)-1)) < 0) {
913 0 : RETURN_FALSE;
914 : }
915 0 : cp += i;
916 0 : add_next_index_string(mx_list, buf, 1);
917 0 : if (need_weight) {
918 0 : add_next_index_long(weight_list, weight);
919 : }
920 : }
921 0 : RETURN_TRUE;
922 : }
923 : /* }}} */
924 : #endif /* HAVE_DN_SKIPNAME && HAVE_DN_EXPAND */
925 :
926 : #endif /* HAVE_RES_SEARCH && !(defined(__BEOS__)||defined(PHP_WIN32) || defined(NETWARE)) */
927 :
928 : /*
929 : * Local variables:
930 : * tab-width: 4
931 : * c-basic-offset: 4
932 : * End:
933 : * vim600: sw=4 ts=4 fdm=marker
934 : * vim<600: sw=4 ts=4
935 : */
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