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@interface OFDNSResolver_ResolveSocketAddressContext: OFObject
{
OFString *_host;
id _target;
SEL _selector;
id _context;
OFMutableArray OF_GENERIC(OF_KINDOF(OFDNSResourceRecord *)) *_records;
@public
unsigned int _expectedResponses;
}
- (instancetype)initWithHost: (OFString *)host
target: (id)target
selector: (SEL)selector
context: (id)context;
- (bool)parseRecords: (OFArray *)records
resolver: (OFDNSResolver *)resolver
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion;
- (void)resolveCNAME: (OFCNAMEDNSResourceRecord *)CNAME
resolver: (OFDNSResolver *)resolver
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion;
- (void)doneWithDomainName: (OFString *)domainName
resolver: (OFDNSResolver *)resolver;
- (void)resolver: (OFDNSResolver *)resolver
didResolveDomainName: (OFString *)domainName
answerRecords: (OFDictionary *)answerRecords
authorityRecords: (OFDictionary *)authorityRecords
additionalRecords: (OFDictionary *)additionalRecords
context: (id)context
exception: (id)exception;
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@interface OFDNSResolver_ResolveSocketAddressContext: OFObject
{
OFString *_host;
id _target;
SEL _selector;
id _context;
OFMutableArray OF_GENERIC(OF_KINDOF(OFDNSResourceRecord *)) *_records;
OFDNSResolver *_resolver;
OFString *_domainName;
@public
unsigned int _expectedResponses;
}
- (instancetype)initWithHost: (OFString *)host
target: (id)target
selector: (SEL)selector
context: (id)context;
- (bool)parseRecords: (OFArray *)records
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion
result: (OFMutableArray *)result;
- (void)resolveCNAME: (OFCNAMEDNSResourceRecord *)CNAME
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion
result: (OFMutableArray *)result;
- (void)resolver: (OFDNSResolver *)resolver
didResolveCNAME: (OFString *)CNAME
answerRecords: (OFDictionary *)answerRecords
authorityRecords: (OFDictionary *)authorityRecords
additionalRecords: (OFDictionary *)additionalRecords
context: (id)context
exception: (id)exception;
- (void)done;
- (void)resolver: (OFDNSResolver *)resolver
didResolveDomainName: (OFString *)domainName
answerRecords: (OFDictionary *)answerRecords
authorityRecords: (OFDictionary *)authorityRecords
additionalRecords: (OFDictionary *)additionalRecords
context: (id)context
exception: (id)exception;
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- (void)dealloc
{
[_host release];
[_target release];
[_context release];
[_records release];
[super dealloc];
}
- (bool)parseRecords: (OFArray *)records
resolver: (OFDNSResolver *)resolver
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion
{
bool found = false;
for (OF_KINDOF(OFDNSResourceRecord *) record in records) {
if ([record recordClass] != OF_DNS_RESOURCE_RECORD_CLASS_IN)
continue;
if ([record recordType] == recordType) {
[_records addObject: record];
found = true;
} else if ([record recordType] ==
OF_DNS_RESOURCE_RECORD_TYPE_CNAME) {
[self resolveCNAME: record
resolver: resolver
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: recursion];
found = true;
}
}
return found;
}
- (void)resolveCNAME: (OFCNAMEDNSResourceRecord *)CNAME
resolver: (OFDNSResolver *)resolver
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion
{
OFString *domainName = [CNAME alias];
bool found = false;
if (recursion == 0)
return;
if ([self parseRecords: [answerRecords objectForKey: domainName]
resolver: resolver
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: recursion - 1])
found = true;
if ([self parseRecords: [additionalRecords objectForKey: domainName]
resolver: resolver
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: recursion - 1])
found = true;
if (!found) {
/*
* TODO: Send request, add CNAME to _records and replace once
* resolved.
*/
}
}
- (void)doneWithDomainName: (OFString *)domainName
resolver: (OFDNSResolver *)resolver
{
void (*method)(id, SEL, OFDNSResolver *, OFString *, OFData *, id, id) =
(void (*)(id, SEL, OFDNSResolver *, OFString *, OFData *, id, id))
[_target methodForSelector: _selector];
OFMutableData *addresses = nil;
if ([_records count] > 0) {
addresses = [OFMutableData
dataWithItemSize: sizeof(of_socket_address_t)
capacity: [_records count]];
for (OF_KINDOF(OFDNSResourceRecord *) record in _records)
[addresses addItem: [record address]];
[addresses makeImmutable];
method(_target, _selector, resolver, domainName, addresses,
_context, nil);
} else {
OFResolveHostFailedException *e;
e = [OFResolveHostFailedException
exceptionWithHost: _host
recordClass: OF_DNS_RESOURCE_RECORD_CLASS_IN
recordType: 0
error: OF_DNS_RESOLVER_ERROR_UNKNOWN];
method(_target, _selector, resolver, domainName, nil, _context,
e);
}
}
- (void)resolver: (OFDNSResolver *)resolver
didResolveDomainName: (OFString *)domainName
answerRecords: (OFDictionary *)answerRecords
authorityRecords: (OFDictionary *)authorityRecords
additionalRecords: (OFDictionary *)additionalRecords
context: (id)context
exception: (id)exception
{
/*
* TODO: Error handling could be improved. Ignore error if there are
* responses, otherwise propagate error.
*/
of_dns_resource_record_type_t recordType = [context intValue];
_expectedResponses--;
if (exception != nil) {
if (_expectedResponses == 0)
[self doneWithDomainName: domainName
resolver: resolver];
return;
}
[self parseRecords: [answerRecords objectForKey: domainName]
resolver: resolver
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: CNAME_RECURSION];
if (_expectedResponses == 0)
[self doneWithDomainName: domainName
resolver: resolver];
}
@end
@implementation OFDNSResolver
@synthesize staticHosts = _staticHosts, nameServers = _nameServers;
@synthesize localDomain = _localDomain, searchDomains = _searchDomains;
@synthesize timeout = _timeout, maxAttempts = _maxAttempts;
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- (void)dealloc
{
[_host release];
[_target release];
[_context release];
[_records release];
[_resolver release];
[_domainName release];
[super dealloc];
}
- (bool)parseRecords: (OFArray *)records
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion
result: (OFMutableArray *)result
{
bool found = false;
for (OF_KINDOF(OFDNSResourceRecord *) record in records) {
if ([record recordClass] != OF_DNS_RESOURCE_RECORD_CLASS_IN)
continue;
if ([record recordType] == recordType) {
[result addObject: record];
found = true;
} else if ([record recordType] ==
OF_DNS_RESOURCE_RECORD_TYPE_CNAME) {
[self resolveCNAME: record
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: recursion
result: result];
found = true;
}
}
return found;
}
- (void)resolveCNAME: (OFCNAMEDNSResourceRecord *)CNAME
answerRecords: (OFDictionary *)answerRecords
additionalRecords: (OFDictionary *)additionalRecords
recordType: (of_dns_resource_record_type_t)recordType
recursion: (unsigned int)recursion
result: (OFMutableArray *)result
{
OFString *alias = [CNAME alias];
bool found = false;
if (recursion == 0)
return;
if ([self parseRecords: [answerRecords objectForKey: alias]
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: recursion - 1
result: result])
found = true;
if ([self parseRecords: [additionalRecords objectForKey: alias]
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: recursion - 1
result: result])
found = true;
if (!found) {
OFNumber *recordTypeNumber =
[OFNumber numberWithInt: recordType];
_expectedResponses++;
[result addObject:
[OFPair pairWithFirstObject: CNAME
secondObject: recordTypeNumber]];
[_resolver asyncResolveHost: alias
recordClass: OF_DNS_RESOURCE_RECORD_CLASS_IN
recordType: recordType
target: self
selector: @selector(resolver:
didResolveCNAME:
answerRecords:authorityRecords:
additionalRecords:context:
exception:)
context: recordTypeNumber];
}
}
- (void)resolver: (OFDNSResolver *)resolver
didResolveCNAME: (OFString *)CNAME
answerRecords: (OFDictionary *)answerRecords
authorityRecords: (OFDictionary *)authorityRecords
additionalRecords: (OFDictionary *)additionalRecords
context: (id)context
exception: (id)exception
{
/*
* TODO: Error handling could be improved. Ignore error if there are
* responses, otherwise propagate error.
*/
of_dns_resource_record_type_t recordType = [context unsignedIntValue];
bool found = false;
OFMutableArray *records;
size_t count;
OF_ENSURE(resolver == _resolver);
_expectedResponses--;
if (exception != nil) {
if (_expectedResponses == 0)
[self done];
return;
}
records = [OFMutableArray array];
if ([self parseRecords: [answerRecords objectForKey: CNAME]
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: CNAME_RECURSION
result: records])
found = true;
if ([self parseRecords: [additionalRecords objectForKey: CNAME]
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: CNAME_RECURSION
result: records])
found = true;
if (!found) {
if (_expectedResponses == 0)
[self done];
return;
}
count = [_records count];
for (size_t i = 0; i < count; i++) {
id object = [_records objectAtIndex: i];
if (![object isKindOfClass: [OFPair class]])
continue;
if (![[[object firstObject] alias] isEqual: CNAME])
continue;
if ([[object secondObject] unsignedIntValue] != recordType)
continue;
[_records removeObjectAtIndex: i];
[_records insertObjectsFromArray: records
atIndex: i];
i += [records count] - 1;
}
if (_expectedResponses == 0)
[self done];
}
- (void)done
{
void (*method)(id, SEL, OFDNSResolver *, OFString *, OFData *, id, id) =
(void (*)(id, SEL, OFDNSResolver *, OFString *, OFData *, id, id))
[_target methodForSelector: _selector];
OFMutableData *addresses =
[OFMutableData dataWithItemSize: sizeof(of_socket_address_t)];
for (id record in _records) {
if (![record isKindOfClass: [OFDNSResourceRecord class]])
continue;
switch ([record recordType]) {
case OF_DNS_RESOURCE_RECORD_TYPE_A:
case OF_DNS_RESOURCE_RECORD_TYPE_AAAA:
[addresses addItem: [record address]];
break;
default:
break;
}
}
[addresses makeImmutable];
if ([addresses count] > 0)
method(_target, _selector, _resolver, _domainName, addresses,
_context, nil);
else {
OFResolveHostFailedException *e;
e = [OFResolveHostFailedException
exceptionWithHost: _host
recordClass: OF_DNS_RESOURCE_RECORD_CLASS_IN
recordType: 0
error: OF_DNS_RESOLVER_ERROR_UNKNOWN];
method(_target, _selector, _resolver, _domainName, nil,
_context, e);
}
}
- (void)resolver: (OFDNSResolver *)resolver
didResolveDomainName: (OFString *)domainName
answerRecords: (OFDictionary *)answerRecords
authorityRecords: (OFDictionary *)authorityRecords
additionalRecords: (OFDictionary *)additionalRecords
context: (id)context
exception: (id)exception
{
/*
* TODO: Error handling could be improved. Ignore error if there are
* responses, otherwise propagate error.
*/
of_dns_resource_record_type_t recordType = [context unsignedIntValue];
if (_resolver != nil)
OF_ENSURE(resolver == _resolver);
else
_resolver = [resolver retain];
_expectedResponses--;
if (_domainName != nil) {
if (![domainName isEqual: _domainName])
/* Did the config change between requests? */
return;
} else
_domainName = [domainName copy];
if (exception != nil) {
if (_expectedResponses == 0)
[self done];
return;
}
[self parseRecords: [answerRecords objectForKey: _domainName]
answerRecords: answerRecords
additionalRecords: additionalRecords
recordType: recordType
recursion: CNAME_RECURSION
result: _records];
if (_expectedResponses == 0)
[self done];
}
@end
@implementation OFDNSResolver
@synthesize staticHosts = _staticHosts, nameServers = _nameServers;
@synthesize localDomain = _localDomain, searchDomains = _searchDomains;
@synthesize timeout = _timeout, maxAttempts = _maxAttempts;
|