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 | https://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: Pierre A. Joye <pierre@php.net> |
14 +----------------------------------------------------------------------+
15 */
16
17 #include "php.h"
18
19 #include <windows.h>
20 #include <Winbase.h >
21 #include <Windns.h>
22 #include <Ws2tcpip.h>
23
24 #include "php_dns.h"
25
26 #define PHP_DNS_NUM_TYPES 12 /* Number of DNS Types Supported by PHP currently */
27
28 #define PHP_DNS_A 0x00000001
29 #define PHP_DNS_NS 0x00000002
30 #define PHP_DNS_CNAME 0x00000010
31 #define PHP_DNS_SOA 0x00000020
32 #define PHP_DNS_PTR 0x00000800
33 #define PHP_DNS_HINFO 0x00001000
34 #define PHP_DNS_MX 0x00004000
35 #define PHP_DNS_TXT 0x00008000
36 #define PHP_DNS_A6 0x01000000
37 #define PHP_DNS_SRV 0x02000000
38 #define PHP_DNS_NAPTR 0x04000000
39 #define PHP_DNS_AAAA 0x08000000
40 #define PHP_DNS_ANY 0x10000000
41 #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)
42
PHP_FUNCTION(dns_get_mx)43 PHP_FUNCTION(dns_get_mx) /* {{{ */
44 {
45 char *hostname;
46 size_t hostname_len;
47 zval *mx_list, *weight_list = NULL;
48
49 DNS_STATUS status; /* Return value of DnsQuery_A() function */
50 PDNS_RECORD pResult, pRec; /* Pointer to DNS_RECORD structure */
51
52 if (zend_parse_parameters(ZEND_NUM_ARGS(), "sz|z", &hostname, &hostname_len, &mx_list, &weight_list) == FAILURE) {
53 RETURN_THROWS();
54 }
55
56 status = DnsQuery_A(hostname, DNS_TYPE_MX, DNS_QUERY_STANDARD, NULL, &pResult, NULL);
57
58 if (status) {
59 RETURN_FALSE;
60 }
61
62 mx_list = zend_try_array_init(mx_list);
63 if (!mx_list) {
64 goto cleanup;
65 }
66
67 if (weight_list) {
68 weight_list = zend_try_array_init(weight_list);
69 if (!weight_list) {
70 goto cleanup;
71 }
72 }
73
74 for (pRec = pResult; pRec; pRec = pRec->pNext) {
75 DNS_SRV_DATA *srv = &pRec->Data.Srv;
76
77 if (pRec->wType != DNS_TYPE_MX) {
78 continue;
79 }
80
81 add_next_index_string(mx_list, pRec->Data.MX.pNameExchange);
82 if (weight_list) {
83 add_next_index_long(weight_list, srv->wPriority);
84 }
85 }
86
87 cleanup:
88 /* Free memory allocated for DNS records. */
89 DnsRecordListFree(pResult, DnsFreeRecordListDeep);
90
91 RETURN_TRUE;
92 }
93 /* }}} */
94
95 /* {{{ Check DNS records corresponding to a given Internet host name or IP address */
PHP_FUNCTION(dns_check_record)96 PHP_FUNCTION(dns_check_record)
97 {
98 char *hostname;
99 size_t hostname_len;
100 zend_string *rectype = NULL;
101 int type = DNS_TYPE_MX;
102
103 DNS_STATUS status; /* Return value of DnsQuery_A() function */
104 PDNS_RECORD pResult; /* Pointer to DNS_RECORD structure */
105
106 if (zend_parse_parameters(ZEND_NUM_ARGS(), "s|S", &hostname, &hostname_len, &rectype) == FAILURE) {
107 RETURN_THROWS();
108 }
109
110 if (hostname_len == 0) {
111 zend_argument_must_not_be_empty_error(1);
112 RETURN_THROWS();
113 }
114
115 if (rectype) {
116 if (zend_string_equals_literal_ci(rectype, "A")) type = DNS_TYPE_A;
117 else if (zend_string_equals_literal_ci(rectype, "NS")) type = DNS_TYPE_NS;
118 else if (zend_string_equals_literal_ci(rectype, "MX")) type = DNS_TYPE_MX;
119 else if (zend_string_equals_literal_ci(rectype, "PTR")) type = DNS_TYPE_PTR;
120 else if (zend_string_equals_literal_ci(rectype, "ANY")) type = DNS_TYPE_ANY;
121 else if (zend_string_equals_literal_ci(rectype, "SOA")) type = DNS_TYPE_SOA;
122 else if (zend_string_equals_literal_ci(rectype, "TXT")) type = DNS_TYPE_TEXT;
123 else if (zend_string_equals_literal_ci(rectype, "CNAME")) type = DNS_TYPE_CNAME;
124 else if (zend_string_equals_literal_ci(rectype, "AAAA")) type = DNS_TYPE_AAAA;
125 else if (zend_string_equals_literal_ci(rectype, "SRV")) type = DNS_TYPE_SRV;
126 else if (zend_string_equals_literal_ci(rectype, "NAPTR")) type = DNS_TYPE_NAPTR;
127 else if (zend_string_equals_literal_ci(rectype, "A6")) type = DNS_TYPE_A6;
128 else {
129 zend_argument_value_error(2, "must be a valid DNS record type");
130 RETURN_THROWS();
131 }
132 }
133
134 status = DnsQuery_A(hostname, type, DNS_QUERY_STANDARD, NULL, &pResult, NULL);
135
136 if (status) {
137 RETURN_FALSE;
138 }
139
140 RETURN_TRUE;
141 }
142 /* }}} */
143
144 /* {{{ php_parserr */
php_parserr(PDNS_RECORD pRec,int type_to_fetch,int store,bool raw,zval * subarray)145 static void php_parserr(PDNS_RECORD pRec, int type_to_fetch, int store, bool raw, zval *subarray)
146 {
147 int type;
148 u_long ttl;
149
150 type = pRec->wType;
151 ttl = pRec->dwTtl;
152
153 ZVAL_UNDEF(subarray);
154
155 if (type_to_fetch != DNS_TYPE_ANY && type != type_to_fetch) {
156 return;
157 }
158
159 if (!store) {
160 return;
161 }
162
163 array_init(subarray);
164
165 add_assoc_string(subarray, "host", pRec->pName);
166 add_assoc_string(subarray, "class", "IN");
167 add_assoc_long(subarray, "ttl", ttl);
168
169 if (raw) {
170 add_assoc_long(subarray, "type", type);
171 add_assoc_stringl(subarray, "data", (char*) &pRec->Data, (uint32_t) pRec->wDataLength);
172 return;
173 }
174
175 switch (type) {
176 case DNS_TYPE_A: {
177 IN_ADDR ipaddr;
178 char ip[INET_ADDRSTRLEN];
179 ipaddr.S_un.S_addr = (pRec->Data.A.IpAddress);
180 if (!inet_ntop(AF_INET, &ipaddr, ip, INET_ADDRSTRLEN)) {
181 ZVAL_UNDEF(subarray);
182 } else {
183 add_assoc_string(subarray, "type", "A");
184 add_assoc_string(subarray, "ip", ip);
185 }
186 break;
187 }
188
189 case DNS_TYPE_MX:
190 add_assoc_string(subarray, "type", "MX");
191 add_assoc_long(subarray, "pri", pRec->Data.Srv.wPriority);
192 /* no break; */
193
194 case DNS_TYPE_CNAME:
195 if (type == DNS_TYPE_CNAME) {
196 add_assoc_string(subarray, "type", "CNAME");
197 }
198 /* no break; */
199
200 case DNS_TYPE_NS:
201 if (type == DNS_TYPE_NS) {
202 add_assoc_string(subarray, "type", "NS");
203 }
204 /* no break; */
205
206 case DNS_TYPE_PTR:
207 if (type == DNS_TYPE_PTR) {
208 add_assoc_string(subarray, "type", "PTR");
209 }
210 add_assoc_string(subarray, "target", pRec->Data.MX.pNameExchange);
211 break;
212
213 /* Not available on windows, the query is possible but there is no DNS_HINFO_DATA structure */
214 case DNS_TYPE_HINFO:
215 case DNS_TYPE_TEXT:
216 {
217 DWORD i = 0;
218 DNS_TXT_DATA *data_txt = &pRec->Data.TXT;
219 DWORD count = data_txt->dwStringCount;
220 zend_string *txt;
221 char *txt_dst;
222 size_t txt_len = 0;
223 zval entries;
224
225 add_assoc_string(subarray, "type", "TXT");
226
227 array_init(&entries);
228
229 for (i = 0; i < count; i++) {
230 txt_len += strlen(data_txt->pStringArray[i]);
231 }
232
233 txt = zend_string_alloc(txt_len, 0);
234 txt_dst = ZSTR_VAL(txt);
235 for (i = 0; i < count; i++) {
236 size_t len = strlen(data_txt->pStringArray[i]);
237 memcpy(txt_dst, data_txt->pStringArray[i], len);
238 add_next_index_stringl(&entries, data_txt->pStringArray[i], len);
239 txt_dst += len;
240 }
241 *txt_dst = '\0';
242 add_assoc_str(subarray, "txt", txt);
243 add_assoc_zval(subarray, "entries", &entries);
244 }
245 break;
246
247 case DNS_TYPE_SOA:
248 {
249 DNS_SOA_DATA *data_soa = &pRec->Data.Soa;
250
251 add_assoc_string(subarray, "type", "SOA");
252
253 add_assoc_string(subarray, "mname", data_soa->pNamePrimaryServer);
254 add_assoc_string(subarray, "rname", data_soa->pNameAdministrator);
255 add_assoc_long(subarray, "serial", data_soa->dwSerialNo);
256 add_assoc_long(subarray, "refresh", data_soa->dwRefresh);
257 add_assoc_long(subarray, "retry", data_soa->dwRetry);
258 add_assoc_long(subarray, "expire", data_soa->dwExpire);
259 add_assoc_long(subarray, "minimum-ttl", data_soa->dwDefaultTtl);
260 }
261 break;
262
263 case DNS_TYPE_AAAA:
264 {
265 DNS_AAAA_DATA *data_aaaa = &pRec->Data.AAAA;
266 char buf[sizeof("AAAA:AAAA:AAAA:AAAA:AAAA:AAAA:AAAA:AAAA")];
267 char *tp = buf;
268 int i;
269 unsigned short out[8];
270 int have_v6_break = 0, in_v6_break = 0;
271
272 for (i = 0; i < 4; ++i) {
273 DWORD chunk = data_aaaa->Ip6Address.IP6Dword[i];
274 out[i * 2] = htons(LOWORD(chunk));
275 out[i * 2 + 1] = htons(HIWORD(chunk));
276 }
277
278 for(i=0; i < 8; i++) {
279 if (out[i] != 0) {
280 if (tp > (uint8_t *)buf) {
281 in_v6_break = 0;
282 tp[0] = ':';
283 tp++;
284 }
285 tp += snprintf((char*)tp, sizeof(buf) - (tp - (char *) buf), "%x", out[i]);
286 } else {
287 if (!have_v6_break) {
288 have_v6_break = 1;
289 in_v6_break = 1;
290 tp[0] = ':';
291 tp++;
292 } else if (!in_v6_break) {
293 tp[0] = ':';
294 tp++;
295 tp[0] = '0';
296 tp++;
297 }
298 }
299 }
300
301 if (have_v6_break && in_v6_break) {
302 tp[0] = ':';
303 tp++;
304 }
305 tp[0] = '\0';
306
307 add_assoc_string(subarray, "type", "AAAA");
308 add_assoc_string(subarray, "ipv6", buf);
309 }
310 break;
311
312 #if 0
313 /* Won't be implemented. A6 is deprecated. (Pierre) */
314 case DNS_TYPE_A6:
315 break;
316 #endif
317
318 case DNS_TYPE_SRV:
319 {
320 DNS_SRV_DATA *data_srv = &pRec->Data.Srv;
321
322 add_assoc_string(subarray, "type", "SRV");
323 add_assoc_long(subarray, "pri", data_srv->wPriority);
324 add_assoc_long(subarray, "weight", data_srv->wWeight);
325 add_assoc_long(subarray, "port", data_srv->wPort);
326 add_assoc_string(subarray, "target", data_srv->pNameTarget);
327 }
328 break;
329
330 case DNS_TYPE_NAPTR:
331 {
332 DNS_NAPTR_DATA * data_naptr = &pRec->Data.Naptr;
333
334 add_assoc_string(subarray, "type", "NAPTR");
335 add_assoc_long(subarray, "order", data_naptr->wOrder);
336 add_assoc_long(subarray, "pref", data_naptr->wPreference);
337 add_assoc_string(subarray, "flags", data_naptr->pFlags);
338 add_assoc_string(subarray, "services", data_naptr->pService);
339 add_assoc_string(subarray, "regex", data_naptr->pRegularExpression);
340 add_assoc_string(subarray, "replacement", data_naptr->pReplacement);
341 }
342 break;
343
344 default:
345 /* unknown type */
346 ZVAL_UNDEF(subarray);
347 return;
348 }
349
350 }
351 /* }}} */
352
353 /* {{{ Get any Resource Record corresponding to a given Internet host name */
PHP_FUNCTION(dns_get_record)354 PHP_FUNCTION(dns_get_record)
355 {
356 char *hostname;
357 size_t hostname_len;
358 zend_long type_param = PHP_DNS_ANY;
359 zval *authns = NULL, *addtl = NULL;
360 int type, type_to_fetch, first_query = 1, store_results = 1;
361 bool raw = 0;
362
363 if (zend_parse_parameters(ZEND_NUM_ARGS(), "s|lz!z!b",
364 &hostname, &hostname_len, &type_param, &authns, &addtl, &raw) == FAILURE) {
365 RETURN_THROWS();
366 }
367
368 if (authns) {
369 authns = zend_try_array_init(authns);
370 if (!authns) {
371 RETURN_THROWS();
372 }
373 }
374 if (addtl) {
375 addtl = zend_try_array_init(addtl);
376 if (!addtl) {
377 RETURN_THROWS();
378 }
379 }
380
381 if (!raw) {
382 if ((type_param & ~PHP_DNS_ALL) && (type_param != PHP_DNS_ANY)) {
383 zend_argument_value_error(2, "must be a DNS_* constant");
384 RETURN_THROWS();
385 }
386 } else {
387 if ((type_param < 1) || (type_param > 0xFFFF)) {
388 zend_argument_value_error(2, "must be between 1 and 65535 when argument #5 ($raw) is true");
389 RETURN_THROWS();
390 }
391 }
392
393 /* Initialize the return array */
394 array_init(return_value);
395
396 if (raw) {
397 type = -1;
398 } else if (type_param == PHP_DNS_ANY) {
399 type = PHP_DNS_NUM_TYPES + 1;
400 } else {
401 type = 0;
402 }
403
404 for ( ;
405 type < (addtl ? (PHP_DNS_NUM_TYPES + 2) : PHP_DNS_NUM_TYPES) || first_query;
406 type++
407 ) {
408 DNS_STATUS status; /* Return value of DnsQuery_A() function */
409 PDNS_RECORD pResult, pRec; /* Pointer to DNS_RECORD structure */
410
411 first_query = 0;
412 switch (type) {
413 case -1: /* raw */
414 type_to_fetch = type_param;
415 /* skip over the rest and go directly to additional records */
416 type = PHP_DNS_NUM_TYPES - 1;
417 break;
418 case 0:
419 type_to_fetch = type_param&PHP_DNS_A ? DNS_TYPE_A : 0;
420 break;
421 case 1:
422 type_to_fetch = type_param&PHP_DNS_NS ? DNS_TYPE_NS : 0;
423 break;
424 case 2:
425 type_to_fetch = type_param&PHP_DNS_CNAME ? DNS_TYPE_CNAME : 0;
426 break;
427 case 3:
428 type_to_fetch = type_param&PHP_DNS_SOA ? DNS_TYPE_SOA : 0;
429 break;
430 case 4:
431 type_to_fetch = type_param&PHP_DNS_PTR ? DNS_TYPE_PTR : 0;
432 break;
433 case 5:
434 type_to_fetch = type_param&PHP_DNS_HINFO ? DNS_TYPE_HINFO : 0;
435 break;
436 case 6:
437 type_to_fetch = type_param&PHP_DNS_MX ? DNS_TYPE_MX : 0;
438 break;
439 case 7:
440 type_to_fetch = type_param&PHP_DNS_TXT ? DNS_TYPE_TEXT : 0;
441 break;
442 case 8:
443 type_to_fetch = type_param&PHP_DNS_AAAA ? DNS_TYPE_AAAA : 0;
444 break;
445 case 9:
446 type_to_fetch = type_param&PHP_DNS_SRV ? DNS_TYPE_SRV : 0;
447 break;
448 case 10:
449 type_to_fetch = type_param&PHP_DNS_NAPTR ? DNS_TYPE_NAPTR : 0;
450 break;
451 case 11:
452 type_to_fetch = type_param&PHP_DNS_A6 ? DNS_TYPE_A6 : 0;
453 break;
454 case PHP_DNS_NUM_TYPES:
455 store_results = 0;
456 continue;
457 default:
458 case (PHP_DNS_NUM_TYPES + 1):
459 type_to_fetch = DNS_TYPE_ANY;
460 break;
461 }
462
463 if (type_to_fetch) {
464 status = DnsQuery_A(hostname, type_to_fetch, DNS_QUERY_STANDARD, NULL, &pResult, NULL);
465
466 if (status) {
467 if (status == DNS_INFO_NO_RECORDS || status == DNS_ERROR_RCODE_NAME_ERROR) {
468 continue;
469 } else {
470 php_error_docref(NULL, E_WARNING, "DNS Query failed");
471 zend_array_destroy(Z_ARR_P(return_value));
472 RETURN_FALSE;
473 }
474 }
475
476 for (pRec = pResult; pRec; pRec = pRec->pNext) {
477 zval retval;
478
479 if (pRec->Flags.S.Section == DnsSectionAnswer) {
480 php_parserr(pRec, type_to_fetch, store_results, raw, &retval);
481 if (!Z_ISUNDEF(retval) && store_results) {
482 add_next_index_zval(return_value, &retval);
483 }
484 }
485
486 if (authns && pRec->Flags.S.Section == DnsSectionAuthority) {
487
488 php_parserr(pRec, type_to_fetch, 1, raw, &retval);
489 if (!Z_ISUNDEF(retval)) {
490 add_next_index_zval(authns, &retval);
491 }
492 }
493
494 /* Stupid typo in PSDK 6.1, WinDNS.h(1258)... */
495 #ifndef DnsSectionAdditional
496 # ifdef DnsSectionAddtional
497 # define DnsSectionAdditional DnsSectionAddtional
498 # else
499 # define DnsSectionAdditional 3
500 # endif
501 #endif
502 if (addtl && pRec->Flags.S.Section == DnsSectionAdditional) {
503 php_parserr(pRec, type_to_fetch, 1, raw, &retval);
504 if (!Z_ISUNDEF(retval)) {
505 add_next_index_zval(addtl, &retval);
506 }
507 }
508 }
509 /* Free memory allocated for DNS records. */
510 DnsRecordListFree(pResult, DnsFreeRecordListDeep);
511 }
512 }
513 }
514 /* }}} */
515
