246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
|
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
|
-
+
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
+
-
-
+
+
+
+
+
+
+
-
-
+
+
+
+
+
+
+
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
|
}
static OF_KINDOF(OFDNSResourceRecord *)
createResourceRecord(OFString *name, of_dns_resource_record_class_t recordClass,
of_dns_resource_record_type_t recordType, uint32_t TTL,
const unsigned char *buffer, size_t length, size_t i, size_t dataLength)
{
Class class;
uint16_t preference;
id data;
if (recordClass == OF_DNS_RESOURCE_RECORD_CLASS_IN) {
size_t j;
switch (recordType) {
case OF_DNS_RESOURCE_RECORD_TYPE_A:
if (dataLength != 4)
@throw [OFInvalidServerReplyException
exception];
class = [OFADNSResourceRecord class];
data = [OFString stringWithFormat:
@"%u.%u.%u.%u",
buffer[i], buffer[i + 1],
buffer[i + 2], buffer[i + 3]];
break;
return [[[OFADNSResourceRecord alloc]
initWithName: name
recordClass: recordClass
recordType: recordType
data: data
TTL: TTL] autorelease];
case OF_DNS_RESOURCE_RECORD_TYPE_CNAME:
j = i;
data = parseName(buffer, length, &j,
ALLOWED_POINTER_LEVELS);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException
exception];
class = [OFCNAMEDNSResourceRecord class];
return [[[OFCNAMEDNSResourceRecord alloc]
initWithName: name
recordClass: recordClass
recordType: recordType
data: data
TTL: TTL] autorelease];
case OF_DNS_RESOURCE_RECORD_TYPE_MX:
if (dataLength < 2)
@throw [OFInvalidServerReplyException
exception];
preference = (buffer[i] << 8) | buffer[i + 1];
j = i + 2;
data = parseName(buffer, length, &j,
ALLOWED_POINTER_LEVELS);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException
exception];
return [[[OFMXDNSResourceRecord alloc]
initWithName: name
recordClass: recordClass
break;
recordType: recordType
preference: preference
data: data
TTL: TTL] autorelease];
case OF_DNS_RESOURCE_RECORD_TYPE_AAAA:
if (dataLength != 16)
@throw [OFInvalidServerReplyException
exception];
class = [OFAAAADNSResourceRecord class];
data = parseAAAAData(&buffer[i]);
break;
return [[[OFAAAADNSResourceRecord alloc]
initWithName: name
recordClass: recordClass
recordType: recordType
data: data
TTL: TTL] autorelease];
default:
class = [OFDNSResourceRecord class];
data = [OFData dataWithItems: &buffer[i]
count: dataLength];
break;
return [[[OFDNSResourceRecord alloc]
initWithName: name
recordClass: recordClass
recordType: recordType
data: data
TTL: TTL] autorelease];
}
} else {
class = [OFDNSResourceRecord class];
data = [OFData dataWithItems: &buffer[i]
count: dataLength];
}
return [[[class alloc] initWithName: name
recordClass: recordClass
recordType: recordType
data: data
TTL: TTL] autorelease];
return [[[OFDNSResourceRecord alloc]
initWithName: name
recordClass: recordClass
recordType: recordType
data: data
TTL: TTL] autorelease];
}
}
@implementation OFDNSResolver_context
@synthesize host = _host, nameServers = _nameServers;
@synthesize searchDomains = _searchDomains;
@synthesize nameServersIndex = _nameServersIndex;
@synthesize searchDomainsIndex = _searchDomainsIndex, queryData = _queryData;
|