1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | http://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Authors: The typical suspects |
14 | Pollita <pollita@php.net> |
15 | Marcus Boerger <helly@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* {{{ includes */
20 #include "php.h"
21 #include "php_network.h"
22
23 #if HAVE_SYS_SOCKET_H
24 #include <sys/socket.h>
25 #endif
26
27 #ifdef PHP_WIN32
28 # include "win32/inet.h"
29 # include <winsock2.h>
30 # include <windows.h>
31 # include <Ws2tcpip.h>
32 #else
33 #include <netinet/in.h>
34 #if HAVE_ARPA_INET_H
35 #include <arpa/inet.h>
36 #endif
37 #include <netdb.h>
38 #ifdef _OSD_POSIX
39 #undef STATUS
40 #undef T_UNSPEC
41 #endif
42 #if HAVE_ARPA_NAMESER_H
43 #ifdef DARWIN
44 # define BIND_8_COMPAT 1
45 #endif
46 #include <arpa/nameser.h>
47 #endif
48 #if HAVE_RESOLV_H
49 #include <resolv.h>
50 #endif
51 #ifdef HAVE_DNS_H
52 #include <dns.h>
53 #endif
54 #endif
55
56 #ifndef MAXHOSTNAMELEN
57 #define MAXHOSTNAMELEN 255
58 #endif
59
60 /* For the local hostname obtained via gethostname which is different from the
61 dns-related MAXHOSTNAMELEN constant above */
62 #ifndef HOST_NAME_MAX
63 #define HOST_NAME_MAX 255
64 #endif
65
66 #include "php_dns.h"
67
68 /* type compat */
69 #ifndef DNS_T_A
70 #define DNS_T_A 1
71 #endif
72 #ifndef DNS_T_NS
73 #define DNS_T_NS 2
74 #endif
75 #ifndef DNS_T_CNAME
76 #define DNS_T_CNAME 5
77 #endif
78 #ifndef DNS_T_SOA
79 #define DNS_T_SOA 6
80 #endif
81 #ifndef DNS_T_PTR
82 #define DNS_T_PTR 12
83 #endif
84 #ifndef DNS_T_HINFO
85 #define DNS_T_HINFO 13
86 #endif
87 #ifndef DNS_T_MINFO
88 #define DNS_T_MINFO 14
89 #endif
90 #ifndef DNS_T_MX
91 #define DNS_T_MX 15
92 #endif
93 #ifndef DNS_T_TXT
94 #define DNS_T_TXT 16
95 #endif
96 #ifndef DNS_T_AAAA
97 #define DNS_T_AAAA 28
98 #endif
99 #ifndef DNS_T_SRV
100 #define DNS_T_SRV 33
101 #endif
102 #ifndef DNS_T_NAPTR
103 #define DNS_T_NAPTR 35
104 #endif
105 #ifndef DNS_T_A6
106 #define DNS_T_A6 38
107 #endif
108 #ifndef DNS_T_CAA
109 #define DNS_T_CAA 257
110 #endif
111
112 #ifndef DNS_T_ANY
113 #define DNS_T_ANY 255
114 #endif
115 /* }}} */
116
117 static zend_string *php_gethostbyaddr(char *ip);
118 static zend_string *php_gethostbyname(char *name);
119
120 #ifdef HAVE_GETHOSTNAME
121 /* {{{ Get the host name of the current machine */
PHP_FUNCTION(gethostname)122 PHP_FUNCTION(gethostname)
123 {
124 char buf[HOST_NAME_MAX + 1];
125
126 ZEND_PARSE_PARAMETERS_NONE();
127
128 if (gethostname(buf, sizeof(buf))) {
129 php_error_docref(NULL, E_WARNING, "Unable to fetch host [%d]: %s", errno, strerror(errno));
130 RETURN_FALSE;
131 }
132
133 RETURN_STRING(buf);
134 }
135 /* }}} */
136 #endif
137
138 /* TODO: Reimplement the gethostby* functions using the new winxp+ API, in dns_win32.c, then
139 we can have a dns.c, dns_unix.c and dns_win32.c instead of a messy dns.c full of #ifdef
140 */
141
142 /* {{{ Get the Internet host name corresponding to a given IP address */
PHP_FUNCTION(gethostbyaddr)143 PHP_FUNCTION(gethostbyaddr)
144 {
145 char *addr;
146 size_t addr_len;
147 zend_string *hostname;
148
149 ZEND_PARSE_PARAMETERS_START(1, 1)
150 Z_PARAM_PATH(addr, addr_len)
151 ZEND_PARSE_PARAMETERS_END();
152
153 hostname = php_gethostbyaddr(addr);
154
155 if (hostname == NULL) {
156 #if HAVE_IPV6 && HAVE_INET_PTON
157 php_error_docref(NULL, E_WARNING, "Address is not a valid IPv4 or IPv6 address");
158 #else
159 php_error_docref(NULL, E_WARNING, "Address is not in a.b.c.d form");
160 #endif
161 RETVAL_FALSE;
162 } else {
163 RETVAL_STR(hostname);
164 }
165 }
166 /* }}} */
167
168 /* {{{ php_gethostbyaddr */
php_gethostbyaddr(char * ip)169 static zend_string *php_gethostbyaddr(char *ip)
170 {
171 #if HAVE_IPV6 && HAVE_INET_PTON
172 struct in6_addr addr6;
173 #endif
174 struct in_addr addr;
175 struct hostent *hp;
176
177 #if HAVE_IPV6 && HAVE_INET_PTON
178 if (inet_pton(AF_INET6, ip, &addr6)) {
179 hp = gethostbyaddr((char *) &addr6, sizeof(addr6), AF_INET6);
180 } else if (inet_pton(AF_INET, ip, &addr)) {
181 hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
182 } else {
183 return NULL;
184 }
185 #else
186 addr.s_addr = inet_addr(ip);
187
188 if (addr.s_addr == -1) {
189 return NULL;
190 }
191
192 hp = gethostbyaddr((char *) &addr, sizeof(addr), AF_INET);
193 #endif
194
195 if (!hp || hp->h_name == NULL || hp->h_name[0] == '\0') {
196 return zend_string_init(ip, strlen(ip), 0);
197 }
198
199 return zend_string_init(hp->h_name, strlen(hp->h_name), 0);
200 }
201 /* }}} */
202
203 /* {{{ Get the IP address corresponding to a given Internet host name */
PHP_FUNCTION(gethostbyname)204 PHP_FUNCTION(gethostbyname)
205 {
206 char *hostname;
207 size_t hostname_len;
208
209 ZEND_PARSE_PARAMETERS_START(1, 1)
210 Z_PARAM_PATH(hostname, hostname_len)
211 ZEND_PARSE_PARAMETERS_END();
212
213 if (hostname_len > MAXFQDNLEN) {
214 /* name too long, protect from CVE-2015-0235 */
215 php_error_docref(NULL, E_WARNING, "Host name cannot be longer than %d characters", MAXFQDNLEN);
216 RETURN_STRINGL(hostname, hostname_len);
217 }
218
219 RETURN_STR(php_gethostbyname(hostname));
220 }
221 /* }}} */
222
223 /* {{{ Return a list of IP addresses that a given hostname resolves to. */
PHP_FUNCTION(gethostbynamel)224 PHP_FUNCTION(gethostbynamel)
225 {
226 char *hostname;
227 size_t hostname_len;
228 struct hostent *hp;
229 struct in_addr in;
230 int i;
231
232 ZEND_PARSE_PARAMETERS_START(1, 1)
233 Z_PARAM_PATH(hostname, hostname_len)
234 ZEND_PARSE_PARAMETERS_END();
235
236 if (hostname_len > MAXFQDNLEN) {
237 /* name too long, protect from CVE-2015-0235 */
238 php_error_docref(NULL, E_WARNING, "Host name cannot be longer than %d characters", MAXFQDNLEN);
239 RETURN_FALSE;
240 }
241
242 hp = php_network_gethostbyname(hostname);
243 if (!hp) {
244 RETURN_FALSE;
245 }
246
247 array_init(return_value);
248
249 for (i = 0;; i++) {
250 /* On macos h_addr_list entries may be misaligned. */
251 struct in_addr *h_addr_entry; /* Don't call this h_addr, it's a macro! */
252 memcpy(&h_addr_entry, &hp->h_addr_list[i], sizeof(struct in_addr *));
253 if (!h_addr_entry) {
254 return;
255 }
256
257 in = *h_addr_entry;
258 add_next_index_string(return_value, inet_ntoa(in));
259 }
260 }
261 /* }}} */
262
263 /* {{{ php_gethostbyname */
php_gethostbyname(char * name)264 static zend_string *php_gethostbyname(char *name)
265 {
266 struct hostent *hp;
267 struct in_addr *h_addr_0; /* Don't call this h_addr, it's a macro! */
268 struct in_addr in;
269 char *address;
270
271 hp = php_network_gethostbyname(name);
272 if (!hp) {
273 return zend_string_init(name, strlen(name), 0);
274 }
275
276 /* On macos h_addr_list entries may be misaligned. */
277 memcpy(&h_addr_0, &hp->h_addr_list[0], sizeof(struct in_addr *));
278 if (!h_addr_0) {
279 return zend_string_init(name, strlen(name), 0);
280 }
281
282 memcpy(&in.s_addr, h_addr_0, sizeof(in.s_addr));
283
284 address = inet_ntoa(in);
285 return zend_string_init(address, strlen(address), 0);
286 }
287 /* }}} */
288
289 #if HAVE_FULL_DNS_FUNCS || defined(PHP_WIN32)
290 # define PHP_DNS_NUM_TYPES 13 /* Number of DNS Types Supported by PHP currently */
291
292 # define PHP_DNS_A 0x00000001
293 # define PHP_DNS_NS 0x00000002
294 # define PHP_DNS_CNAME 0x00000010
295 # define PHP_DNS_SOA 0x00000020
296 # define PHP_DNS_PTR 0x00000800
297 # define PHP_DNS_HINFO 0x00001000
298 # define PHP_DNS_CAA 0x00002000
299 # define PHP_DNS_MX 0x00004000
300 # define PHP_DNS_TXT 0x00008000
301 # define PHP_DNS_A6 0x01000000
302 # define PHP_DNS_SRV 0x02000000
303 # define PHP_DNS_NAPTR 0x04000000
304 # define PHP_DNS_AAAA 0x08000000
305 # define PHP_DNS_ANY 0x10000000
306 # 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)
307 #endif /* HAVE_FULL_DNS_FUNCS || defined(PHP_WIN32) */
308
309 /* Note: These functions are defined in ext/standard/dns_win32.c for Windows! */
310 #if !defined(PHP_WIN32) && HAVE_DNS_SEARCH_FUNC
311
312 #ifndef HFIXEDSZ
313 #define HFIXEDSZ 12 /* fixed data in header <arpa/nameser.h> */
314 #endif /* HFIXEDSZ */
315
316 #ifndef QFIXEDSZ
317 #define QFIXEDSZ 4 /* fixed data in query <arpa/nameser.h> */
318 #endif /* QFIXEDSZ */
319
320 #undef MAXHOSTNAMELEN
321 #define MAXHOSTNAMELEN 1024
322
323 #ifndef MAXRESOURCERECORDS
324 #define MAXRESOURCERECORDS 64
325 #endif /* MAXRESOURCERECORDS */
326
327 typedef union {
328 HEADER qb1;
329 u_char qb2[65536];
330 } querybuf;
331
332 /* just a hack to free resources allocated by glibc in __res_nsend()
333 * See also:
334 * res_thread_freeres() in glibc/resolv/res_init.c
335 * __libc_res_nsend() in resolv/res_send.c
336 * */
337
338 #if defined(__GLIBC__) && !defined(HAVE_DEPRECATED_DNS_FUNCS)
339 #define php_dns_free_res(__res__) _php_dns_free_res(__res__)
_php_dns_free_res(struct __res_state * res)340 static void _php_dns_free_res(struct __res_state *res) { /* {{{ */
341 int ns;
342 for (ns = 0; ns < MAXNS; ns++) {
343 if (res->_u._ext.nsaddrs[ns] != NULL) {
344 free (res->_u._ext.nsaddrs[ns]);
345 res->_u._ext.nsaddrs[ns] = NULL;
346 }
347 }
348 } /* }}} */
349 #else
350 #define php_dns_free_res(__res__)
351 #endif
352
353 /* {{{ Check DNS records corresponding to a given Internet host name or IP address */
PHP_FUNCTION(dns_check_record)354 PHP_FUNCTION(dns_check_record)
355 {
356 HEADER *hp;
357 querybuf answer;
358 char *hostname, *rectype = NULL;
359 size_t hostname_len, rectype_len = 0;
360 int type = DNS_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 zend_argument_value_error(1, "cannot be empty");
378 RETURN_THROWS();
379 }
380
381 if (rectype) {
382 if (!strcasecmp("A", rectype)) type = DNS_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 zend_argument_value_error(2, "must be a valid DNS record type");
397 RETURN_THROWS();
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 i = php_dns_search(handle, hostname, C_IN, type, answer.qb2, sizeof answer);
416 php_dns_free_handle(handle);
417
418 if (i < 0) {
419 RETURN_FALSE;
420 }
421 hp = (HEADER *)&answer;
422 RETURN_BOOL(ntohs(hp->ancount) != 0);
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 != DNS_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 /* {{{ Get any Resource Record corresponding to a given Internet host name */
PHP_FUNCTION(dns_get_record)794 PHP_FUNCTION(dns_get_record)
795 {
796 char *hostname;
797 size_t hostname_len;
798 zend_long type_param = PHP_DNS_ANY;
799 zval *authns = NULL, *addtl = NULL;
800 int type_to_fetch;
801 int dns_errno;
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(authns)
822 Z_PARAM_ZVAL(addtl)
823 Z_PARAM_BOOL(raw)
824 ZEND_PARSE_PARAMETERS_END();
825
826 if (authns) {
827 authns = zend_try_array_init(authns);
828 if (!authns) {
829 RETURN_THROWS();
830 }
831 }
832 if (addtl) {
833 addtl = zend_try_array_init(addtl);
834 if (!addtl) {
835 RETURN_THROWS();
836 }
837 }
838
839 if (!raw) {
840 if ((type_param & ~PHP_DNS_ALL) && (type_param != PHP_DNS_ANY)) {
841 zend_argument_value_error(2, "must be a DNS_* constant");
842 RETURN_THROWS();
843 }
844 } else {
845 if ((type_param < 1) || (type_param > 0xFFFF)) {
846 zend_argument_value_error(2, "must be between 1 and 65535 when argument #5 ($raw) is true");
847 RETURN_THROWS();
848 }
849 }
850
851 /* Initialize the return array */
852 array_init(return_value);
853
854 /* - We emulate an or'ed type mask by querying type by type. (Steps 0 - NUMTYPES-1 )
855 * If additional info is wanted we check again with DNS_T_ANY (step NUMTYPES / NUMTYPES+1 )
856 * store_results is used to skip storing the results retrieved in step
857 * NUMTYPES+1 when results were already fetched.
858 * - In case of PHP_DNS_ANY we use the directly fetch DNS_T_ANY. (step NUMTYPES+1 )
859 * - In case of raw mode, we query only the requested type instead of looping type by type
860 * before going with the additional info stuff.
861 */
862
863 if (raw) {
864 type = -1;
865 } else if (type_param == PHP_DNS_ANY) {
866 type = PHP_DNS_NUM_TYPES + 1;
867 } else {
868 type = 0;
869 }
870
871 for ( ;
872 type < (addtl ? (PHP_DNS_NUM_TYPES + 2) : PHP_DNS_NUM_TYPES) || first_query;
873 type++
874 ) {
875 first_query = 0;
876 switch (type) {
877 case -1: /* raw */
878 type_to_fetch = type_param;
879 /* skip over the rest and go directly to additional records */
880 type = PHP_DNS_NUM_TYPES - 1;
881 break;
882 case 0:
883 type_to_fetch = type_param&PHP_DNS_A ? DNS_T_A : 0;
884 break;
885 case 1:
886 type_to_fetch = type_param&PHP_DNS_NS ? DNS_T_NS : 0;
887 break;
888 case 2:
889 type_to_fetch = type_param&PHP_DNS_CNAME ? DNS_T_CNAME : 0;
890 break;
891 case 3:
892 type_to_fetch = type_param&PHP_DNS_SOA ? DNS_T_SOA : 0;
893 break;
894 case 4:
895 type_to_fetch = type_param&PHP_DNS_PTR ? DNS_T_PTR : 0;
896 break;
897 case 5:
898 type_to_fetch = type_param&PHP_DNS_HINFO ? DNS_T_HINFO : 0;
899 break;
900 case 6:
901 type_to_fetch = type_param&PHP_DNS_MX ? DNS_T_MX : 0;
902 break;
903 case 7:
904 type_to_fetch = type_param&PHP_DNS_TXT ? DNS_T_TXT : 0;
905 break;
906 case 8:
907 type_to_fetch = type_param&PHP_DNS_AAAA ? DNS_T_AAAA : 0;
908 break;
909 case 9:
910 type_to_fetch = type_param&PHP_DNS_SRV ? DNS_T_SRV : 0;
911 break;
912 case 10:
913 type_to_fetch = type_param&PHP_DNS_NAPTR ? DNS_T_NAPTR : 0;
914 break;
915 case 11:
916 type_to_fetch = type_param&PHP_DNS_A6 ? DNS_T_A6 : 0;
917 break;
918 case 12:
919 type_to_fetch = type_param&PHP_DNS_CAA ? DNS_T_CAA : 0;
920 break;
921 case PHP_DNS_NUM_TYPES:
922 store_results = 0;
923 continue;
924 default:
925 case (PHP_DNS_NUM_TYPES + 1):
926 type_to_fetch = DNS_T_ANY;
927 break;
928 }
929
930 if (type_to_fetch) {
931 #if defined(HAVE_DNS_SEARCH)
932 handle = dns_open(NULL);
933 if (handle == NULL) {
934 zend_array_destroy(Z_ARR_P(return_value));
935 RETURN_FALSE;
936 }
937 #elif defined(HAVE_RES_NSEARCH)
938 memset(&state, 0, sizeof(state));
939 if (res_ninit(handle)) {
940 zend_array_destroy(Z_ARR_P(return_value));
941 RETURN_FALSE;
942 }
943 #else
944 res_init();
945 #endif
946
947 n = php_dns_search(handle, hostname, C_IN, type_to_fetch, answer.qb2, sizeof answer);
948
949 if (n < 0) {
950 dns_errno = php_dns_errno(handle);
951 php_dns_free_handle(handle);
952 switch (dns_errno) {
953 case NO_DATA:
954 case HOST_NOT_FOUND:
955 continue;
956
957 case NO_RECOVERY:
958 php_error_docref(NULL, E_WARNING, "An unexpected server failure occurred.");
959 break;
960
961 case TRY_AGAIN:
962 php_error_docref(NULL, E_WARNING, "A temporary server error occurred.");
963 break;
964
965 default:
966 php_error_docref(NULL, E_WARNING, "DNS Query failed");
967 }
968 zend_array_destroy(Z_ARR_P(return_value));
969 RETURN_FALSE;
970 }
971
972 cp = answer.qb2 + HFIXEDSZ;
973 end = answer.qb2 + n;
974 hp = (HEADER *)&answer;
975 qd = ntohs(hp->qdcount);
976 an = ntohs(hp->ancount);
977 ns = ntohs(hp->nscount);
978 ar = ntohs(hp->arcount);
979
980 /* Skip QD entries, they're only used by dn_expand later on */
981 while (qd-- > 0) {
982 n = dn_skipname(cp, end);
983 if (n < 0) {
984 php_error_docref(NULL, E_WARNING, "Unable to parse DNS data received");
985 zend_array_destroy(Z_ARR_P(return_value));
986 php_dns_free_handle(handle);
987 RETURN_FALSE;
988 }
989 cp += n + QFIXEDSZ;
990 }
991
992 /* YAY! Our real answers! */
993 while (an-- && cp && cp < end) {
994 zval retval;
995
996 cp = php_parserr(cp, end, &answer, type_to_fetch, store_results, raw, &retval);
997 if (Z_TYPE(retval) != IS_UNDEF && store_results) {
998 add_next_index_zval(return_value, &retval);
999 }
1000 }
1001
1002 if (authns || addtl) {
1003 /* List of Authoritative Name Servers
1004 * Process when only requesting addtl so that we can skip through the section
1005 */
1006 while (ns-- > 0 && cp && cp < end) {
1007 zval retval;
1008
1009 cp = php_parserr(cp, end, &answer, DNS_T_ANY, authns != NULL, raw, &retval);
1010 if (Z_TYPE(retval) != IS_UNDEF) {
1011 add_next_index_zval(authns, &retval);
1012 }
1013 }
1014 }
1015
1016 if (addtl) {
1017 /* Additional records associated with authoritative name servers */
1018 while (ar-- > 0 && cp && cp < end) {
1019 zval retval;
1020
1021 cp = php_parserr(cp, end, &answer, DNS_T_ANY, 1, raw, &retval);
1022 if (Z_TYPE(retval) != IS_UNDEF) {
1023 add_next_index_zval(addtl, &retval);
1024 }
1025 }
1026 }
1027 php_dns_free_handle(handle);
1028 }
1029 }
1030 }
1031 /* }}} */
1032
1033 /* {{{ Get MX records corresponding to a given Internet host name */
PHP_FUNCTION(dns_get_mx)1034 PHP_FUNCTION(dns_get_mx)
1035 {
1036 char *hostname;
1037 size_t hostname_len;
1038 zval *mx_list, *weight_list = NULL;
1039 int count, qdc;
1040 u_short type, weight;
1041 querybuf answer;
1042 char buf[MAXHOSTNAMELEN];
1043 HEADER *hp;
1044 u_char *cp, *end;
1045 int i;
1046 #if defined(HAVE_DNS_SEARCH)
1047 struct sockaddr_storage from;
1048 uint32_t fromsize = sizeof(from);
1049 dns_handle_t handle;
1050 #elif defined(HAVE_RES_NSEARCH)
1051 struct __res_state state;
1052 struct __res_state *handle = &state;
1053 #endif
1054
1055 ZEND_PARSE_PARAMETERS_START(2, 3)
1056 Z_PARAM_STRING(hostname, hostname_len)
1057 Z_PARAM_ZVAL(mx_list)
1058 Z_PARAM_OPTIONAL
1059 Z_PARAM_ZVAL(weight_list)
1060 ZEND_PARSE_PARAMETERS_END();
1061
1062 mx_list = zend_try_array_init(mx_list);
1063 if (!mx_list) {
1064 RETURN_THROWS();
1065 }
1066
1067 if (weight_list) {
1068 weight_list = zend_try_array_init(weight_list);
1069 if (!weight_list) {
1070 RETURN_THROWS();
1071 }
1072 }
1073
1074 #if defined(HAVE_DNS_SEARCH)
1075 handle = dns_open(NULL);
1076 if (handle == NULL) {
1077 RETURN_FALSE;
1078 }
1079 #elif defined(HAVE_RES_NSEARCH)
1080 memset(&state, 0, sizeof(state));
1081 if (res_ninit(handle)) {
1082 RETURN_FALSE;
1083 }
1084 #else
1085 res_init();
1086 #endif
1087
1088 i = php_dns_search(handle, hostname, C_IN, DNS_T_MX, answer.qb2, sizeof answer);
1089 if (i < 0) {
1090 php_dns_free_handle(handle);
1091 RETURN_FALSE;
1092 }
1093 hp = (HEADER *)&answer;
1094 cp = answer.qb2 + HFIXEDSZ;
1095 end = answer.qb2 + i;
1096 for (qdc = ntohs((unsigned short)hp->qdcount); qdc--; cp += i + QFIXEDSZ) {
1097 if ((i = dn_skipname(cp, end)) < 0 ) {
1098 php_dns_free_handle(handle);
1099 RETURN_FALSE;
1100 }
1101 }
1102 count = ntohs((unsigned short)hp->ancount);
1103 while (--count >= 0 && cp < end) {
1104 if ((i = dn_skipname(cp, end)) < 0 ) {
1105 php_dns_free_handle(handle);
1106 RETURN_FALSE;
1107 }
1108 cp += i;
1109 GETSHORT(type, cp);
1110 cp += INT16SZ + INT32SZ;
1111 GETSHORT(i, cp);
1112 if (type != DNS_T_MX) {
1113 cp += i;
1114 continue;
1115 }
1116 GETSHORT(weight, cp);
1117 if ((i = dn_expand(answer.qb2, end, cp, buf, sizeof(buf)-1)) < 0) {
1118 php_dns_free_handle(handle);
1119 RETURN_FALSE;
1120 }
1121 cp += i;
1122 add_next_index_string(mx_list, buf);
1123 if (weight_list) {
1124 add_next_index_long(weight_list, weight);
1125 }
1126 }
1127 php_dns_free_handle(handle);
1128 RETURN_BOOL(zend_hash_num_elements(Z_ARRVAL_P(mx_list)) != 0);
1129 }
1130 /* }}} */
1131 #endif /* HAVE_FULL_DNS_FUNCS */
1132 #endif /* !defined(PHP_WIN32) && HAVE_DNS_SEARCH_FUNC */
1133
1134 #if HAVE_FULL_DNS_FUNCS && !defined(PHP_WIN32)
PHP_MINIT_FUNCTION(dns)1135 PHP_MINIT_FUNCTION(dns) {
1136 REGISTER_LONG_CONSTANT("DNS_A", PHP_DNS_A, CONST_CS | CONST_PERSISTENT);
1137 REGISTER_LONG_CONSTANT("DNS_NS", PHP_DNS_NS, CONST_CS | CONST_PERSISTENT);
1138 REGISTER_LONG_CONSTANT("DNS_CNAME", PHP_DNS_CNAME, CONST_CS | CONST_PERSISTENT);
1139 REGISTER_LONG_CONSTANT("DNS_SOA", PHP_DNS_SOA, CONST_CS | CONST_PERSISTENT);
1140 REGISTER_LONG_CONSTANT("DNS_PTR", PHP_DNS_PTR, CONST_CS | CONST_PERSISTENT);
1141 REGISTER_LONG_CONSTANT("DNS_HINFO", PHP_DNS_HINFO, CONST_CS | CONST_PERSISTENT);
1142 REGISTER_LONG_CONSTANT("DNS_CAA", PHP_DNS_CAA, CONST_CS | CONST_PERSISTENT);
1143 REGISTER_LONG_CONSTANT("DNS_MX", PHP_DNS_MX, CONST_CS | CONST_PERSISTENT);
1144 REGISTER_LONG_CONSTANT("DNS_TXT", PHP_DNS_TXT, CONST_CS | CONST_PERSISTENT);
1145 REGISTER_LONG_CONSTANT("DNS_SRV", PHP_DNS_SRV, CONST_CS | CONST_PERSISTENT);
1146 REGISTER_LONG_CONSTANT("DNS_NAPTR", PHP_DNS_NAPTR, CONST_CS | CONST_PERSISTENT);
1147 REGISTER_LONG_CONSTANT("DNS_AAAA", PHP_DNS_AAAA, CONST_CS | CONST_PERSISTENT);
1148 REGISTER_LONG_CONSTANT("DNS_A6", PHP_DNS_A6, CONST_CS | CONST_PERSISTENT);
1149 REGISTER_LONG_CONSTANT("DNS_ANY", PHP_DNS_ANY, CONST_CS | CONST_PERSISTENT);
1150 REGISTER_LONG_CONSTANT("DNS_ALL", PHP_DNS_ALL, CONST_CS | CONST_PERSISTENT);
1151 return SUCCESS;
1152 }
1153 #endif /* HAVE_FULL_DNS_FUNCS */
1154
