Overview
| Comment: | OFDNSResolver: Multiple attempts for resolving |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
42cb3d287c969afa2ade364951cb5d9c |
| User & Date: | js on 2018-08-12 01:12:42 |
| Other Links: | manifest | tags |
Context
|
2018-08-12
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| 12:37 | OFDNSResolver: Parse authority and additional RRs check-in: 6305a0c7a4 user: js tags: trunk | |
| 01:12 | OFDNSResolver: Multiple attempts for resolving check-in: 42cb3d287c user: js tags: trunk | |
|
2018-08-11
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| 21:53 | Fix build on 3DS and Wii check-in: 9a494f183b user: js tags: trunk | |
Changes
Modified src/OFDNSResolver.m from [4bcaef27d1] to [f296db2c83].
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* many. Since it's unspecified, we have to assume that it might happen, but we
* also want to limit it to avoid DoS. Limiting it to 16 levels of pointers and
* immediately rejecting pointers to itself seems like a fair balance.
*/
#define MAX_ALLOWED_POINTERS 16
#define TIMEOUT 2
#define ATTEMPTS 3
/*
* TODO:
*
* - Resolve with each search domain
* - Fallback to TCP
*/
@interface OFDNSResolverQuery: OFObject
{
OFString *_host;
of_dns_resource_record_class_t _recordClass;
of_dns_resource_record_type_t _recordType;
OFNumber *_ID;
OFArray OF_GENERIC(OFString *) *_nameServers, *_searchDomains;
size_t _nameServersIndex, _searchDomainsIndex;
size_t _attempt;
id _target;
SEL _selector;
id _context;
OFData *_queryData;
OFTimer *_cancelTimer;
}
@property (readonly, nonatomic) OFString *host;
@property (readonly, nonatomic) of_dns_resource_record_class_t recordClass;
@property (readonly, nonatomic) of_dns_resource_record_type_t recordType;
@property (readonly, nonatomic) OFNumber *ID;
@property (readonly, nonatomic) OFArray OF_GENERIC(OFString *) *nameServers;
@property (readonly, nonatomic) OFArray OF_GENERIC(OFString *) *searchDomains;
@property (nonatomic) size_t nameServersIndex;
@property (nonatomic) size_t searchDomainsIndex;
@property (nonatomic) size_t attempt;
@property (readonly, nonatomic) id target;
@property (readonly, nonatomic) SEL selector;
@property (readonly, nonatomic) id context;
@property (readonly, nonatomic) OFData *queryData;
@property (retain, nonatomic) OFTimer *cancelTimer;
- (instancetype)initWithHost: (OFString *)host
|
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466 467 468 469 470 471 472 | 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 | - - - + + + | } @implementation OFDNSResolverQuery @synthesize host = _host, recordClass = _recordClass, recordType = _recordType; @synthesize ID = _ID, nameServers = _nameServers; @synthesize searchDomains = _searchDomains; @synthesize nameServersIndex = _nameServersIndex; |
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return;
if ([query nameServersIndex] + 1 < [[query nameServers] count]) {
[query setNameServersIndex: [query nameServersIndex] + 1];
[self of_sendQuery: query];
return;
}
if ([query attempt] < ATTEMPTS) {
[query setAttempt: [query attempt] + 1];
[query setNameServersIndex: 0];
[self of_sendQuery: query];
return;
}
target = [[[query target] retain] autorelease];
selector = [query selector];
callback = (void (*)(id, SEL, OFArray *, id, id))
[target methodForSelector: selector];
exception = [OFResolveHostFailedException
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