1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 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 /* $Id$ */
22
23 /* {{{ includes */
24 #include "php.h"
25 #include "php_network.h"
26
27 #if HAVE_SYS_SOCKET_H
28 #include <sys/socket.h>
29 #endif
30
31 #ifdef PHP_WIN32
32 # include "win32/inet.h"
33 # include <winsock2.h>
34 # include <windows.h>
35 # include <Ws2tcpip.h>
36 #else
37 #include <netinet/in.h>
38 #if HAVE_ARPA_INET_H
39 #include <arpa/inet.h>
40 #endif
41 #include <netdb.h>
42 #ifdef _OSD_POSIX
43 #undef STATUS
44 #undef T_UNSPEC
45 #endif
46 #if HAVE_ARPA_NAMESER_H
47 #ifdef DARWIN
48 # define BIND_8_COMPAT 1
49 #endif
50 #include <arpa/nameser.h>
51 #endif
52 #if HAVE_RESOLV_H
53 #include <resolv.h>
54 #endif
55 #ifdef HAVE_DNS_H
56 #include <dns.h>
57 #endif
58 #endif
59
60 #ifndef MAXHOSTNAMELEN
61 #define MAXHOSTNAMELEN 255
62 #endif
63
64 /* For the local hostname obtained via gethostname which is different from the
65 dns-related MAXHOSTNAMELEN constant above */
66 #ifndef HOST_NAME_MAX
67 #define HOST_NAME_MAX 255
68 #endif
69
70 #include "php_dns.h"
71
72 /* type compat */
73 #ifndef DNS_T_A
74 #define DNS_T_A 1
75 #endif
76 #ifndef DNS_T_NS
77 #define DNS_T_NS 2
78 #endif
79 #ifndef DNS_T_CNAME
80 #define DNS_T_CNAME 5
81 #endif
82 #ifndef DNS_T_SOA
83 #define DNS_T_SOA 6
84 #endif
85 #ifndef DNS_T_PTR
86 #define DNS_T_PTR 12
87 #endif
88 #ifndef DNS_T_HINFO
89 #define DNS_T_HINFO 13
90 #endif
91 #ifndef DNS_T_MINFO
92 #define DNS_T_MINFO 14
93 #endif
94 #ifndef DNS_T_MX
95 #define DNS_T_MX 15
96 #endif
97 #ifndef DNS_T_TXT
98 #define DNS_T_TXT 16
99 #endif
100 #ifndef DNS_T_AAAA
101 #define DNS_T_AAAA 28
102 #endif
103 #ifndef DNS_T_SRV
104 #define DNS_T_SRV 33
105 #endif
106 #ifndef DNS_T_NAPTR
107 #define DNS_T_NAPTR 35
108 #endif
109 #ifndef DNS_T_A6
110 #define DNS_T_A6 38
111 #endif
112 #ifndef DNS_T_CAA
113 #define DNS_T_CAA 257
114 #endif
115
116 #ifndef DNS_T_ANY
117 #define DNS_T_ANY 255
118 #endif
119 /* }}} */
120
121 static zend_string *php_gethostbyaddr(char *ip);
122 static zend_string *php_gethostbyname(char *name);
123
124 #ifdef HAVE_GETHOSTNAME
125 /* {{{ proto string gethostname()
126 Get the host name of the current machine */
PHP_FUNCTION(gethostname)127 PHP_FUNCTION(gethostname)
128 {
129 char buf[HOST_NAME_MAX + 1];
130
131 if (zend_parse_parameters_none() == FAILURE) {
132 return;
133 }
134
135 if (gethostname(buf, sizeof(buf))) {
136 php_error_docref(NULL, E_WARNING, "unable to fetch host [%d]: %s", errno, strerror(errno));
137 RETURN_FALSE;
138 }
139
140 RETURN_STRING(buf);
141 }
142 /* }}} */
143 #endif
144
145 /* TODO: Reimplement the gethostby* functions using the new winxp+ API, in dns_win32.c, then
146 we can have a dns.c, dns_unix.c and dns_win32.c instead of a messy dns.c full of #ifdef
147 */
148
149 /* {{{ proto string gethostbyaddr(string ip_address)
150 Get the Internet host name corresponding to a given IP address */
PHP_FUNCTION(gethostbyaddr)151 PHP_FUNCTION(gethostbyaddr)
152 {
153 char *addr;
154 size_t addr_len;
155 zend_string *hostname;
156
157 ZEND_PARSE_PARAMETERS_START(1, 1)
158 Z_PARAM_STRING(addr, addr_len)
159 ZEND_PARSE_PARAMETERS_END();
160
161 hostname = php_gethostbyaddr(addr);
162
163 if (hostname == NULL) {
164 #if HAVE_IPV6 && HAVE_INET_PTON
165 php_error_docref(NULL, E_WARNING, "Address is not a valid IPv4 or IPv6 address");
166 #else
167 php_error_docref(NULL, E_WARNING, "Address is not in a.b.c.d form");
168 #endif
169 RETVAL_FALSE;
170 } else {
171 RETVAL_STR(hostname);
172 }
173 }
174 /* }}} */
175
176 /* {{{ php_gethostbyaddr */
php_gethostbyaddr(char * ip)177 static zend_string *php_gethostbyaddr(char *ip)
178 {
179 #if HAVE_IPV6 && HAVE_INET_PTON
180 struct in6_addr addr6;
181 #endif
182 struct in_addr addr;
183 struct hostent *hp;
184
185 #if HAVE_IPV6 && HAVE_INET_PTON
186 if (inet_pton(AF_INET6, ip, &addr6)) {
187 hp = gethostbyaddr((char *) &addr6, sizeof(addr6), AF_INET6);
188 } else if (inet_pton(AF_INET, ip, &addr)) {
189 hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
190 } else {
191 return NULL;
192 }
193 #else
194 addr.s_addr = inet_addr(ip);
195
196 if (addr.s_addr == -1) {
197 return NULL;
198 }
199
200 hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
201 #endif
202
203 if (!hp || hp->h_name == NULL || hp->h_name[0] == '\0') {
204 return zend_string_init(ip, strlen(ip), 0);
205 }
206
207 return zend_string_init(hp->h_name, strlen(hp->h_name), 0);
208 }
209 /* }}} */
210
211 /* {{{ proto string gethostbyname(string hostname)
212 Get the IP address corresponding to a given Internet host name */
PHP_FUNCTION(gethostbyname)213 PHP_FUNCTION(gethostbyname)
214 {
215 char *hostname;
216 size_t hostname_len;
217
218 ZEND_PARSE_PARAMETERS_START(1, 1)
219 Z_PARAM_STRING(hostname, hostname_len)
220 ZEND_PARSE_PARAMETERS_END();
221
222 if(hostname_len > MAXFQDNLEN) {
223 /* name too long, protect from CVE-2015-0235 */
224 php_error_docref(NULL, E_WARNING, "Host name is too long, the limit is %d characters", MAXFQDNLEN);
225 RETURN_STRINGL(hostname, hostname_len);
226 }
227
228 RETURN_STR(php_gethostbyname(hostname));
229 }
230 /* }}} */
231
232 /* {{{ proto array gethostbynamel(string hostname)
233 Return a list of IP addresses that a given hostname resolves to. */
PHP_FUNCTION(gethostbynamel)234 PHP_FUNCTION(gethostbynamel)
235 {
236 char *hostname;
237 size_t hostname_len;
238 struct hostent *hp;
239 struct in_addr in;
240 int i;
241
242 ZEND_PARSE_PARAMETERS_START(1, 1)
243 Z_PARAM_STRING(hostname, hostname_len)
244 ZEND_PARSE_PARAMETERS_END();
245
246 if(hostname_len > MAXFQDNLEN) {
247 /* name too long, protect from CVE-2015-0235 */
248 php_error_docref(NULL, E_WARNING, "Host name is too long, the limit is %d characters", MAXFQDNLEN);
249 RETURN_FALSE;
250 }
251
252 hp = php_network_gethostbyname(hostname);
253 if (hp == NULL || hp->h_addr_list == NULL) {
254 RETURN_FALSE;
255 }
256
257 array_init(return_value);
258
259 for (i = 0 ; hp->h_addr_list[i] != 0 ; i++) {
260 in = *(struct in_addr *) hp->h_addr_list[i];
261 add_next_index_string(return_value, inet_ntoa(in));
262 }
263 }
264 /* }}} */
265
266 /* {{{ php_gethostbyname */
php_gethostbyname(char * name)267 static zend_string *php_gethostbyname(char *name)
268 {
269 struct hostent *hp;
270 struct in_addr in;
271 char *address;
272
273 hp = php_network_gethostbyname(name);
274
275 if (!hp || !*(hp->h_addr_list)) {
276 return zend_string_init(name, strlen(name), 0);
277 }
278
279 memcpy(&in.s_addr, *(hp->h_addr_list), sizeof(in.s_addr));
280
281 address = inet_ntoa(in);
282 return zend_string_init(address, strlen(address), 0);
283 }
284 /* }}} */
285
286 #if HAVE_FULL_DNS_FUNCS || defined(PHP_WIN32)
287 # define PHP_DNS_NUM_TYPES 13 /* Number of DNS Types Supported by PHP currently */
288
289 # define PHP_DNS_A 0x00000001
290 # define PHP_DNS_NS 0x00000002
291 # define PHP_DNS_CNAME 0x00000010
292 # define PHP_DNS_SOA 0x00000020
293 # define PHP_DNS_PTR 0x00000800
294 # define PHP_DNS_HINFO 0x00001000
295 # define PHP_DNS_CAA 0x00002000
296 # define PHP_DNS_MX 0x00004000
297 # define PHP_DNS_TXT 0x00008000
298 # define PHP_DNS_A6 0x01000000
299 # define PHP_DNS_SRV 0x02000000
300 # define PHP_DNS_NAPTR 0x04000000
301 # define PHP_DNS_AAAA 0x08000000
302 # define PHP_DNS_ANY 0x10000000
303 # define PHP_DNS_ALL (PHP_DNS_A|PHP_DNS_NS|PHP_DNS_CNAME|PHP_DNS_SOA|PHP_DNS_PTR|PHP_DNS_HINFO|PHP_DNS_CAA|PHP_DNS_MX|PHP_DNS_TXT|PHP_DNS_A6|PHP_DNS_SRV|PHP_DNS_NAPTR|PHP_DNS_AAAA)
304 #endif /* HAVE_FULL_DNS_FUNCS || defined(PHP_WIN32) */
305
306 /* Note: These functions are defined in ext/standard/dns_win32.c for Windows! */
307 #if !defined(PHP_WIN32) && (HAVE_DNS_SEARCH_FUNC && !defined(__BEOS__))
308
309 #ifndef HFIXEDSZ
310 #define HFIXEDSZ 12 /* fixed data in header <arpa/nameser.h> */
311 #endif /* HFIXEDSZ */
312
313 #ifndef QFIXEDSZ
314 #define QFIXEDSZ 4 /* fixed data in query <arpa/nameser.h> */
315 #endif /* QFIXEDSZ */
316
317 #undef MAXHOSTNAMELEN
318 #define MAXHOSTNAMELEN 1024
319
320 #ifndef MAXRESOURCERECORDS
321 #define MAXRESOURCERECORDS 64
322 #endif /* MAXRESOURCERECORDS */
323
324 typedef union {
325 HEADER qb1;
326 u_char qb2[65536];
327 } querybuf;
328
329 /* just a hack to free resources allocated by glibc in __res_nsend()
330 * See also:
331 * res_thread_freeres() in glibc/resolv/res_init.c
332 * __libc_res_nsend() in resolv/res_send.c
333 * */
334
335 #if defined(__GLIBC__) && !defined(HAVE_DEPRECATED_DNS_FUNCS)
336 #define php_dns_free_res(__res__) _php_dns_free_res(__res__)
_php_dns_free_res(struct __res_state * res)337 static void _php_dns_free_res(struct __res_state *res) { /* {{{ */
338 int ns;
339 for (ns = 0; ns < MAXNS; ns++) {
340 if (res->_u._ext.nsaddrs[ns] != NULL) {
341 free (res->_u._ext.nsaddrs[ns]);
342 res->_u._ext.nsaddrs[ns] = NULL;
343 }
344 }
345 } /* }}} */
346 #else
347 #define php_dns_free_res(__res__)
348 #endif
349
350 /* {{{ proto bool dns_check_record(string host [, string type])
351 Check DNS records corresponding to a given Internet host name or IP address */
PHP_FUNCTION(dns_check_record)352 PHP_FUNCTION(dns_check_record)
353 {
354 #ifndef MAXPACKET
355 #define MAXPACKET 8192 /* max packet size used internally by BIND */
356 #endif
357 u_char ans[MAXPACKET];
358 char *hostname, *rectype = NULL;
359 size_t hostname_len, rectype_len = 0;
360 int type = T_MX, i;
361 #if defined(HAVE_DNS_SEARCH)
362 struct sockaddr_storage from;
363 uint32_t fromsize = sizeof(from);
364 dns_handle_t handle;
365 #elif defined(HAVE_RES_NSEARCH)
366 struct __res_state state;
367 struct __res_state *handle = &state;
368 #endif
369
370 ZEND_PARSE_PARAMETERS_START(1, 2)
371 Z_PARAM_STRING(hostname, hostname_len)
372 Z_PARAM_OPTIONAL
373 Z_PARAM_STRING(rectype, rectype_len)
374 ZEND_PARSE_PARAMETERS_END();
375
376 if (hostname_len == 0) {
377 php_error_docref(NULL, E_WARNING, "Host cannot be empty");
378 RETURN_FALSE;
379 }
380
381 if (rectype) {
382 if (!strcasecmp("A", rectype)) type = T_A;
383 else if (!strcasecmp("NS", rectype)) type = DNS_T_NS;
384 else if (!strcasecmp("MX", rectype)) type = DNS_T_MX;
385 else if (!strcasecmp("PTR", rectype)) type = DNS_T_PTR;
386 else if (!strcasecmp("ANY", rectype)) type = DNS_T_ANY;
387 else if (!strcasecmp("SOA", rectype)) type = DNS_T_SOA;
388 else if (!strcasecmp("CAA", rectype)) type = DNS_T_CAA;
389 else if (!strcasecmp("TXT", rectype)) type = DNS_T_TXT;
390 else if (!strcasecmp("CNAME", rectype)) type = DNS_T_CNAME;
391 else if (!strcasecmp("AAAA", rectype)) type = DNS_T_AAAA;
392 else if (!strcasecmp("SRV", rectype)) type = DNS_T_SRV;
393 else if (!strcasecmp("NAPTR", rectype)) type = DNS_T_NAPTR;
394 else if (!strcasecmp("A6", rectype)) type = DNS_T_A6;
395 else {
396 php_error_docref(NULL, E_WARNING, "Type '%s' not supported", rectype);
397 RETURN_FALSE;
398 }
399 }
400
401 #if defined(HAVE_DNS_SEARCH)
402 handle = dns_open(NULL);
403 if (handle == NULL) {
404 RETURN_FALSE;
405 }
406 #elif defined(HAVE_RES_NSEARCH)
407 memset(&state, 0, sizeof(state));
408 if (res_ninit(handle)) {
409 RETURN_FALSE;
410 }
411 #else
412 res_init();
413 #endif
414
415 RETVAL_TRUE;
416 i = php_dns_search(handle, hostname, C_IN, type, ans, sizeof(ans));
417
418 if (i < 0) {
419 RETVAL_FALSE;
420 }
421
422 php_dns_free_handle(handle);
423 }
424 /* }}} */
425
426 #if HAVE_FULL_DNS_FUNCS
427
428 #define CHECKCP(n) do { \
429 if (cp + n > end) { \
430 return NULL; \
431 } \
432 } while (0)
433
434 /* {{{ php_parserr */
php_parserr(u_char * cp,u_char * end,querybuf * answer,int type_to_fetch,int store,int raw,zval * subarray)435 static u_char *php_parserr(u_char *cp, u_char *end, querybuf *answer, int type_to_fetch, int store, int raw, zval *subarray)
436 {
437 u_short type, class, dlen;
438 u_long ttl;
439 long n, i;
440 u_short s;
441 u_char *tp, *p;
442 char name[MAXHOSTNAMELEN];
443 int have_v6_break = 0, in_v6_break = 0;
444
445 ZVAL_UNDEF(subarray);
446
447 n = dn_expand(answer->qb2, end, cp, name, sizeof(name) - 2);
448 if (n < 0) {
449 return NULL;
450 }
451 cp += n;
452
453 CHECKCP(10);
454 GETSHORT(type, cp);
455 GETSHORT(class, cp);
456 GETLONG(ttl, cp);
457 GETSHORT(dlen, cp);
458 CHECKCP(dlen);
459 if (dlen == 0) {
460 /* No data in the response - nothing to do */
461 return NULL;
462 }
463 if (type_to_fetch != T_ANY && type != type_to_fetch) {
464 cp += dlen;
465 return cp;
466 }
467
468 if (!store) {
469 cp += dlen;
470 return cp;
471 }
472
473 array_init(subarray);
474
475 add_assoc_string(subarray, "host", name);
476 add_assoc_string(subarray, "class", "IN");
477 add_assoc_long(subarray, "ttl", ttl);
478 (void) class;
479
480 if (raw) {
481 add_assoc_long(subarray, "type", type);
482 add_assoc_stringl(subarray, "data", (char*) cp, (uint32_t) dlen);
483 cp += dlen;
484 return cp;
485 }
486
487 switch (type) {
488 case DNS_T_A:
489 CHECKCP(4);
490 add_assoc_string(subarray, "type", "A");
491 snprintf(name, sizeof(name), "%d.%d.%d.%d", cp[0], cp[1], cp[2], cp[3]);
492 add_assoc_string(subarray, "ip", name);
493 cp += dlen;
494 break;
495 case DNS_T_MX:
496 CHECKCP(2);
497 add_assoc_string(subarray, "type", "MX");
498 GETSHORT(n, cp);
499 add_assoc_long(subarray, "pri", n);
500 /* no break; */
501 case DNS_T_CNAME:
502 if (type == DNS_T_CNAME) {
503 add_assoc_string(subarray, "type", "CNAME");
504 }
505 /* no break; */
506 case DNS_T_NS:
507 if (type == DNS_T_NS) {
508 add_assoc_string(subarray, "type", "NS");
509 }
510 /* no break; */
511 case DNS_T_PTR:
512 if (type == DNS_T_PTR) {
513 add_assoc_string(subarray, "type", "PTR");
514 }
515 n = dn_expand(answer->qb2, end, cp, name, (sizeof name) - 2);
516 if (n < 0) {
517 return NULL;
518 }
519 cp += n;
520 add_assoc_string(subarray, "target", name);
521 break;
522 case DNS_T_HINFO:
523 /* See RFC 1010 for values */
524 add_assoc_string(subarray, "type", "HINFO");
525 CHECKCP(1);
526 n = *cp & 0xFF;
527 cp++;
528 CHECKCP(n);
529 add_assoc_stringl(subarray, "cpu", (char*)cp, n);
530 cp += n;
531 CHECKCP(1);
532 n = *cp & 0xFF;
533 cp++;
534 CHECKCP(n);
535 add_assoc_stringl(subarray, "os", (char*)cp, n);
536 cp += n;
537 break;
538 case DNS_T_CAA:
539 /* See RFC 6844 for values https://tools.ietf.org/html/rfc6844 */
540 add_assoc_string(subarray, "type", "CAA");
541 // 1 flag byte
542 CHECKCP(1);
543 n = *cp & 0xFF;
544 add_assoc_long(subarray, "flags", n);
545 cp++;
546 // Tag length (1 byte)
547 CHECKCP(1);
548 n = *cp & 0xFF;
549 cp++;
550 CHECKCP(n);
551 add_assoc_stringl(subarray, "tag", (char*)cp, n);
552 cp += n;
553 if ( (size_t) dlen < ((size_t)n) + 2 ) {
554 return NULL;
555 }
556 n = dlen - n - 2;
557 CHECKCP(n);
558 add_assoc_stringl(subarray, "value", (char*)cp, n);
559 cp += n;
560 break;
561 case DNS_T_TXT:
562 {
563 int l1 = 0, l2 = 0;
564 zval entries;
565 zend_string *tp;
566
567 add_assoc_string(subarray, "type", "TXT");
568 tp = zend_string_alloc(dlen, 0);
569
570 array_init(&entries);
571
572 while (l1 < dlen) {
573 n = cp[l1];
574 if ((l1 + n) >= dlen) {
575 // Invalid chunk length, truncate
576 n = dlen - (l1 + 1);
577 }
578 if (n) {
579 memcpy(ZSTR_VAL(tp) + l2 , cp + l1 + 1, n);
580 add_next_index_stringl(&entries, (char *) cp + l1 + 1, n);
581 }
582 l1 = l1 + n + 1;
583 l2 = l2 + n;
584 }
585 ZSTR_VAL(tp)[l2] = '\0';
586 ZSTR_LEN(tp) = l2;
587 cp += dlen;
588
589 add_assoc_str(subarray, "txt", tp);
590 add_assoc_zval(subarray, "entries", &entries);
591 }
592 break;
593 case DNS_T_SOA:
594 add_assoc_string(subarray, "type", "SOA");
595 n = dn_expand(answer->qb2, end, cp, name, (sizeof name) -2);
596 if (n < 0) {
597 return NULL;
598 }
599 cp += n;
600 add_assoc_string(subarray, "mname", name);
601 n = dn_expand(answer->qb2, end, cp, name, (sizeof name) -2);
602 if (n < 0) {
603 return NULL;
604 }
605 cp += n;
606 add_assoc_string(subarray, "rname", name);
607 CHECKCP(5*4);
608 GETLONG(n, cp);
609 add_assoc_long(subarray, "serial", n);
610 GETLONG(n, cp);
611 add_assoc_long(subarray, "refresh", n);
612 GETLONG(n, cp);
613 add_assoc_long(subarray, "retry", n);
614 GETLONG(n, cp);
615 add_assoc_long(subarray, "expire", n);
616 GETLONG(n, cp);
617 add_assoc_long(subarray, "minimum-ttl", n);
618 break;
619 case DNS_T_AAAA:
620 tp = (u_char*)name;
621 CHECKCP(8*2);
622 for(i=0; i < 8; i++) {
623 GETSHORT(s, cp);
624 if (s != 0) {
625 if (tp > (u_char *)name) {
626 in_v6_break = 0;
627 tp[0] = ':';
628 tp++;
629 }
630 tp += sprintf((char*)tp,"%x",s);
631 } else {
632 if (!have_v6_break) {
633 have_v6_break = 1;
634 in_v6_break = 1;
635 tp[0] = ':';
636 tp++;
637 } else if (!in_v6_break) {
638 tp[0] = ':';
639 tp++;
640 tp[0] = '0';
641 tp++;
642 }
643 }
644 }
645 if (have_v6_break && in_v6_break) {
646 tp[0] = ':';
647 tp++;
648 }
649 tp[0] = '\0';
650 add_assoc_string(subarray, "type", "AAAA");
651 add_assoc_string(subarray, "ipv6", name);
652 break;
653 case DNS_T_A6:
654 p = cp;
655 add_assoc_string(subarray, "type", "A6");
656 CHECKCP(1);
657 n = ((int)cp[0]) & 0xFF;
658 cp++;
659 add_assoc_long(subarray, "masklen", n);
660 tp = (u_char*)name;
661 if (n > 15) {
662 have_v6_break = 1;
663 in_v6_break = 1;
664 tp[0] = ':';
665 tp++;
666 }
667 if (n % 16 > 8) {
668 /* Partial short */
669 if (cp[0] != 0) {
670 if (tp > (u_char *)name) {
671 in_v6_break = 0;
672 tp[0] = ':';
673 tp++;
674 }
675 sprintf((char*)tp, "%x", cp[0] & 0xFF);
676 } else {
677 if (!have_v6_break) {
678 have_v6_break = 1;
679 in_v6_break = 1;
680 tp[0] = ':';
681 tp++;
682 } else if (!in_v6_break) {
683 tp[0] = ':';
684 tp++;
685 tp[0] = '0';
686 tp++;
687 }
688 }
689 cp++;
690 }
691 for (i = (n + 8) / 16; i < 8; i++) {
692 CHECKCP(2);
693 GETSHORT(s, cp);
694 if (s != 0) {
695 if (tp > (u_char *)name) {
696 in_v6_break = 0;
697 tp[0] = ':';
698 tp++;
699 }
700 tp += sprintf((char*)tp,"%x",s);
701 } else {
702 if (!have_v6_break) {
703 have_v6_break = 1;
704 in_v6_break = 1;
705 tp[0] = ':';
706 tp++;
707 } else if (!in_v6_break) {
708 tp[0] = ':';
709 tp++;
710 tp[0] = '0';
711 tp++;
712 }
713 }
714 }
715 if (have_v6_break && in_v6_break) {
716 tp[0] = ':';
717 tp++;
718 }
719 tp[0] = '\0';
720 add_assoc_string(subarray, "ipv6", name);
721 if (cp < p + dlen) {
722 n = dn_expand(answer->qb2, end, cp, name, (sizeof name) - 2);
723 if (n < 0) {
724 return NULL;
725 }
726 cp += n;
727 add_assoc_string(subarray, "chain", name);
728 }
729 break;
730 case DNS_T_SRV:
731 CHECKCP(3*2);
732 add_assoc_string(subarray, "type", "SRV");
733 GETSHORT(n, cp);
734 add_assoc_long(subarray, "pri", n);
735 GETSHORT(n, cp);
736 add_assoc_long(subarray, "weight", n);
737 GETSHORT(n, cp);
738 add_assoc_long(subarray, "port", n);
739 n = dn_expand(answer->qb2, end, cp, name, (sizeof name) - 2);
740 if (n < 0) {
741 return NULL;
742 }
743 cp += n;
744 add_assoc_string(subarray, "target", name);
745 break;
746 case DNS_T_NAPTR:
747 CHECKCP(2*2);
748 add_assoc_string(subarray, "type", "NAPTR");
749 GETSHORT(n, cp);
750 add_assoc_long(subarray, "order", n);
751 GETSHORT(n, cp);
752 add_assoc_long(subarray, "pref", n);
753
754 CHECKCP(1);
755 n = (cp[0] & 0xFF);
756 cp++;
757 CHECKCP(n);
758 add_assoc_stringl(subarray, "flags", (char*)cp, n);
759 cp += n;
760
761 CHECKCP(1);
762 n = (cp[0] & 0xFF);
763 cp++;
764 CHECKCP(n);
765 add_assoc_stringl(subarray, "services", (char*)cp, n);
766 cp += n;
767
768 CHECKCP(1);
769 n = (cp[0] & 0xFF);
770 cp++;
771 CHECKCP(n);
772 add_assoc_stringl(subarray, "regex", (char*)cp, n);
773 cp += n;
774
775 n = dn_expand(answer->qb2, end, cp, name, (sizeof name) - 2);
776 if (n < 0) {
777 return NULL;
778 }
779 cp += n;
780 add_assoc_string(subarray, "replacement", name);
781 break;
782 default:
783 zval_ptr_dtor(subarray);
784 ZVAL_UNDEF(subarray);
785 cp += dlen;
786 break;
787 }
788
789 return cp;
790 }
791 /* }}} */
792
793 /* {{{ proto array|false dns_get_record(string hostname [, int type[, array &authns[, array &addtl[, bool raw]]]])
794 Get any Resource Record corresponding to a given Internet host name */
PHP_FUNCTION(dns_get_record)795 PHP_FUNCTION(dns_get_record)
796 {
797 char *hostname;
798 size_t hostname_len;
799 zend_long type_param = PHP_DNS_ANY;
800 zval *authns = NULL, *addtl = NULL;
801 int type_to_fetch;
802 #if defined(HAVE_DNS_SEARCH)
803 struct sockaddr_storage from;
804 uint32_t fromsize = sizeof(from);
805 dns_handle_t handle;
806 #elif defined(HAVE_RES_NSEARCH)
807 struct __res_state state;
808 struct __res_state *handle = &state;
809 #endif
810 HEADER *hp;
811 querybuf answer;
812 u_char *cp = NULL, *end = NULL;
813 int n, qd, an, ns = 0, ar = 0;
814 int type, first_query = 1, store_results = 1;
815 zend_bool raw = 0;
816
817 ZEND_PARSE_PARAMETERS_START(1, 5)
818 Z_PARAM_STRING(hostname, hostname_len)
819 Z_PARAM_OPTIONAL
820 Z_PARAM_LONG(type_param)
821 Z_PARAM_ZVAL_DEREF_EX(authns, 1, 0)
822 Z_PARAM_ZVAL_DEREF_EX(addtl, 1, 0)
823 Z_PARAM_BOOL(raw)
824 ZEND_PARSE_PARAMETERS_END();
825
826 if (authns) {
827 zval_ptr_dtor(authns);
828 array_init(authns);
829 }
830 if (addtl) {
831 zval_ptr_dtor(addtl);
832 array_init(addtl);
833 }
834
835 if (!raw) {
836 if ((type_param & ~PHP_DNS_ALL) && (type_param != PHP_DNS_ANY)) {
837 php_error_docref(NULL, E_WARNING, "Type '" ZEND_LONG_FMT "' not supported", type_param);
838 RETURN_FALSE;
839 }
840 } else {
841 if ((type_param < 1) || (type_param > 0xFFFF)) {
842 php_error_docref(NULL, E_WARNING,
843 "Numeric DNS record type must be between 1 and 65535, '" ZEND_LONG_FMT "' given", type_param);
844 RETURN_FALSE;
845 }
846 }
847
848 /* Initialize the return array */
849 array_init(return_value);
850
851 /* - We emulate an or'ed type mask by querying type by type. (Steps 0 - NUMTYPES-1 )
852 * If additional info is wanted we check again with DNS_T_ANY (step NUMTYPES / NUMTYPES+1 )
853 * store_results is used to skip storing the results retrieved in step
854 * NUMTYPES+1 when results were already fetched.
855 * - In case of PHP_DNS_ANY we use the directly fetch DNS_T_ANY. (step NUMTYPES+1 )
856 * - In case of raw mode, we query only the requestd type instead of looping type by type
857 * before going with the additional info stuff.
858 */
859
860 if (raw) {
861 type = -1;
862 } else if (type_param == PHP_DNS_ANY) {
863 type = PHP_DNS_NUM_TYPES + 1;
864 } else {
865 type = 0;
866 }
867
868 for ( ;
869 type < (addtl ? (PHP_DNS_NUM_TYPES + 2) : PHP_DNS_NUM_TYPES) || first_query;
870 type++
871 ) {
872 first_query = 0;
873 switch (type) {
874 case -1: /* raw */
875 type_to_fetch = type_param;
876 /* skip over the rest and go directly to additional records */
877 type = PHP_DNS_NUM_TYPES - 1;
878 break;
879 case 0:
880 type_to_fetch = type_param&PHP_DNS_A ? DNS_T_A : 0;
881 break;
882 case 1:
883 type_to_fetch = type_param&PHP_DNS_NS ? DNS_T_NS : 0;
884 break;
885 case 2:
886 type_to_fetch = type_param&PHP_DNS_CNAME ? DNS_T_CNAME : 0;
887 break;
888 case 3:
889 type_to_fetch = type_param&PHP_DNS_SOA ? DNS_T_SOA : 0;
890 break;
891 case 4:
892 type_to_fetch = type_param&PHP_DNS_PTR ? DNS_T_PTR : 0;
893 break;
894 case 5:
895 type_to_fetch = type_param&PHP_DNS_HINFO ? DNS_T_HINFO : 0;
896 break;
897 case 6:
898 type_to_fetch = type_param&PHP_DNS_MX ? DNS_T_MX : 0;
899 break;
900 case 7:
901 type_to_fetch = type_param&PHP_DNS_TXT ? DNS_T_TXT : 0;
902 break;
903 case 8:
904 type_to_fetch = type_param&PHP_DNS_AAAA ? DNS_T_AAAA : 0;
905 break;
906 case 9:
907 type_to_fetch = type_param&PHP_DNS_SRV ? DNS_T_SRV : 0;
908 break;
909 case 10:
910 type_to_fetch = type_param&PHP_DNS_NAPTR ? DNS_T_NAPTR : 0;
911 break;
912 case 11:
913 type_to_fetch = type_param&PHP_DNS_A6 ? DNS_T_A6 : 0;
914 break;
915 case 12:
916 type_to_fetch = type_param&PHP_DNS_CAA ? DNS_T_CAA : 0;
917 break;
918 case PHP_DNS_NUM_TYPES:
919 store_results = 0;
920 continue;
921 default:
922 case (PHP_DNS_NUM_TYPES + 1):
923 type_to_fetch = DNS_T_ANY;
924 break;
925 }
926
927 if (type_to_fetch) {
928 #if defined(HAVE_DNS_SEARCH)
929 handle = dns_open(NULL);
930 if (handle == NULL) {
931 zval_dtor(return_value);
932 RETURN_FALSE;
933 }
934 #elif defined(HAVE_RES_NSEARCH)
935 memset(&state, 0, sizeof(state));
936 if (res_ninit(handle)) {
937 zval_dtor(return_value);
938 RETURN_FALSE;
939 }
940 #else
941 res_init();
942 #endif
943
944 n = php_dns_search(handle, hostname, C_IN, type_to_fetch, answer.qb2, sizeof answer);
945
946 if (n < 0) {
947 php_dns_free_handle(handle);
948 switch (h_errno) {
949 case NO_DATA:
950 case HOST_NOT_FOUND:
951 continue;
952
953 case NO_RECOVERY:
954 php_error_docref(NULL, E_WARNING, "An unexpected server failure occurred.");
955 break;
956
957 case TRY_AGAIN:
958 php_error_docref(NULL, E_WARNING, "A temporary server error occurred.");
959 break;
960
961 default:
962 php_error_docref(NULL, E_WARNING, "DNS Query failed");
963 }
964 zval_dtor(return_value);
965 RETURN_FALSE;
966 }
967
968 cp = answer.qb2 + HFIXEDSZ;
969 end = answer.qb2 + n;
970 hp = (HEADER *)&answer;
971 qd = ntohs(hp->qdcount);
972 an = ntohs(hp->ancount);
973 ns = ntohs(hp->nscount);
974 ar = ntohs(hp->arcount);
975
976 /* Skip QD entries, they're only used by dn_expand later on */
977 while (qd-- > 0) {
978 n = dn_skipname(cp, end);
979 if (n < 0) {
980 php_error_docref(NULL, E_WARNING, "Unable to parse DNS data received");
981 zval_dtor(return_value);
982 php_dns_free_handle(handle);
983 RETURN_FALSE;
984 }
985 cp += n + QFIXEDSZ;
986 }
987
988 /* YAY! Our real answers! */
989 while (an-- && cp && cp < end) {
990 zval retval;
991
992 cp = php_parserr(cp, end, &answer, type_to_fetch, store_results, raw, &retval);
993 if (Z_TYPE(retval) != IS_UNDEF && store_results) {
994 add_next_index_zval(return_value, &retval);
995 }
996 }
997
998 if (authns || addtl) {
999 /* List of Authoritative Name Servers
1000 * Process when only requesting addtl so that we can skip through the section
1001 */
1002 while (ns-- > 0 && cp && cp < end) {
1003 zval retval;
1004
1005 cp = php_parserr(cp, end, &answer, DNS_T_ANY, authns != NULL, raw, &retval);
1006 if (Z_TYPE(retval) != IS_UNDEF) {
1007 add_next_index_zval(authns, &retval);
1008 }
1009 }
1010 }
1011
1012 if (addtl) {
1013 /* Additional records associated with authoritative name servers */
1014 while (ar-- > 0 && cp && cp < end) {
1015 zval retval;
1016
1017 cp = php_parserr(cp, end, &answer, DNS_T_ANY, 1, raw, &retval);
1018 if (Z_TYPE(retval) != IS_UNDEF) {
1019 add_next_index_zval(addtl, &retval);
1020 }
1021 }
1022 }
1023 php_dns_free_handle(handle);
1024 }
1025 }
1026 }
1027 /* }}} */
1028
1029 /* {{{ proto bool dns_get_mx(string hostname, array mxhosts [, array weight])
1030 Get MX records corresponding to a given Internet host name */
PHP_FUNCTION(dns_get_mx)1031 PHP_FUNCTION(dns_get_mx)
1032 {
1033 char *hostname;
1034 size_t hostname_len;
1035 zval *mx_list, *weight_list = NULL;
1036 int count, qdc;
1037 u_short type, weight;
1038 u_char ans[MAXPACKET];
1039 char buf[MAXHOSTNAMELEN];
1040 HEADER *hp;
1041 u_char *cp, *end;
1042 int i;
1043 #if defined(HAVE_DNS_SEARCH)
1044 struct sockaddr_storage from;
1045 uint32_t fromsize = sizeof(from);
1046 dns_handle_t handle;
1047 #elif defined(HAVE_RES_NSEARCH)
1048 struct __res_state state;
1049 struct __res_state *handle = &state;
1050 #endif
1051
1052 ZEND_PARSE_PARAMETERS_START(2, 3)
1053 Z_PARAM_STRING(hostname, hostname_len)
1054 Z_PARAM_ZVAL_DEREF(mx_list)
1055 Z_PARAM_OPTIONAL
1056 Z_PARAM_ZVAL_DEREF(weight_list)
1057 ZEND_PARSE_PARAMETERS_END();
1058
1059 zval_ptr_dtor(mx_list);
1060 array_init(mx_list);
1061
1062 if (weight_list) {
1063 zval_ptr_dtor(weight_list);
1064 array_init(weight_list);
1065 }
1066
1067 #if defined(HAVE_DNS_SEARCH)
1068 handle = dns_open(NULL);
1069 if (handle == NULL) {
1070 RETURN_FALSE;
1071 }
1072 #elif defined(HAVE_RES_NSEARCH)
1073 memset(&state, 0, sizeof(state));
1074 if (res_ninit(handle)) {
1075 RETURN_FALSE;
1076 }
1077 #else
1078 res_init();
1079 #endif
1080
1081 i = php_dns_search(handle, hostname, C_IN, DNS_T_MX, (u_char *)&ans, sizeof(ans));
1082 if (i < 0) {
1083 RETURN_FALSE;
1084 }
1085 if (i > (int)sizeof(ans)) {
1086 i = sizeof(ans);
1087 }
1088 hp = (HEADER *)&ans;
1089 cp = (u_char *)&ans + HFIXEDSZ;
1090 end = (u_char *)&ans +i;
1091 for (qdc = ntohs((unsigned short)hp->qdcount); qdc--; cp += i + QFIXEDSZ) {
1092 if ((i = dn_skipname(cp, end)) < 0 ) {
1093 php_dns_free_handle(handle);
1094 RETURN_FALSE;
1095 }
1096 }
1097 count = ntohs((unsigned short)hp->ancount);
1098 while (--count >= 0 && cp < end) {
1099 if ((i = dn_skipname(cp, end)) < 0 ) {
1100 php_dns_free_handle(handle);
1101 RETURN_FALSE;
1102 }
1103 cp += i;
1104 GETSHORT(type, cp);
1105 cp += INT16SZ + INT32SZ;
1106 GETSHORT(i, cp);
1107 if (type != DNS_T_MX) {
1108 cp += i;
1109 continue;
1110 }
1111 GETSHORT(weight, cp);
1112 if ((i = dn_expand(ans, end, cp, buf, sizeof(buf)-1)) < 0) {
1113 php_dns_free_handle(handle);
1114 RETURN_FALSE;
1115 }
1116 cp += i;
1117 add_next_index_string(mx_list, buf);
1118 if (weight_list) {
1119 add_next_index_long(weight_list, weight);
1120 }
1121 }
1122 php_dns_free_handle(handle);
1123 RETURN_TRUE;
1124 }
1125 /* }}} */
1126 #endif /* HAVE_FULL_DNS_FUNCS */
1127 #endif /* !defined(PHP_WIN32) && (HAVE_DNS_SEARCH_FUNC && !defined(__BEOS__)) */
1128
1129 #if HAVE_FULL_DNS_FUNCS || defined(PHP_WIN32)
PHP_MINIT_FUNCTION(dns)1130 PHP_MINIT_FUNCTION(dns) {
1131 REGISTER_LONG_CONSTANT("DNS_A", PHP_DNS_A, CONST_CS | CONST_PERSISTENT);
1132 REGISTER_LONG_CONSTANT("DNS_NS", PHP_DNS_NS, CONST_CS | CONST_PERSISTENT);
1133 REGISTER_LONG_CONSTANT("DNS_CNAME", PHP_DNS_CNAME, CONST_CS | CONST_PERSISTENT);
1134 REGISTER_LONG_CONSTANT("DNS_SOA", PHP_DNS_SOA, CONST_CS | CONST_PERSISTENT);
1135 REGISTER_LONG_CONSTANT("DNS_PTR", PHP_DNS_PTR, CONST_CS | CONST_PERSISTENT);
1136 REGISTER_LONG_CONSTANT("DNS_HINFO", PHP_DNS_HINFO, CONST_CS | CONST_PERSISTENT);
1137 REGISTER_LONG_CONSTANT("DNS_CAA", PHP_DNS_CAA, CONST_CS | CONST_PERSISTENT);
1138 REGISTER_LONG_CONSTANT("DNS_MX", PHP_DNS_MX, CONST_CS | CONST_PERSISTENT);
1139 REGISTER_LONG_CONSTANT("DNS_TXT", PHP_DNS_TXT, CONST_CS | CONST_PERSISTENT);
1140 REGISTER_LONG_CONSTANT("DNS_SRV", PHP_DNS_SRV, CONST_CS | CONST_PERSISTENT);
1141 REGISTER_LONG_CONSTANT("DNS_NAPTR", PHP_DNS_NAPTR, CONST_CS | CONST_PERSISTENT);
1142 REGISTER_LONG_CONSTANT("DNS_AAAA", PHP_DNS_AAAA, CONST_CS | CONST_PERSISTENT);
1143 REGISTER_LONG_CONSTANT("DNS_A6", PHP_DNS_A6, CONST_CS | CONST_PERSISTENT);
1144 REGISTER_LONG_CONSTANT("DNS_ANY", PHP_DNS_ANY, CONST_CS | CONST_PERSISTENT);
1145 REGISTER_LONG_CONSTANT("DNS_ALL", PHP_DNS_ALL, CONST_CS | CONST_PERSISTENT);
1146 return SUCCESS;
1147 }
1148 #endif /* HAVE_FULL_DNS_FUNCS */
1149
1150 /*
1151 * Local variables:
1152 * tab-width: 4
1153 * c-basic-offset: 4
1154 * End:
1155 * vim600: sw=4 ts=4 fdm=marker
1156 * vim<600: sw=4 ts=4
1157 */
1158
