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#import "OFUDPSocket.h"
#import "OFUDPSocket+Private.h"
#import "OFDNSQueryFailedException.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidArgumentException.h"
#import "OFInvalidFormatException.h"
#import "OFInvalidServerReplyException.h"
#import "OFInvalidServerResponseException.h"
#import "OFNotImplementedException.h"
#import "OFOutOfRangeException.h"
#import "OFTruncatedDataException.h"
#ifndef SOCK_DNS
# define SOCK_DNS 0
#endif
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componentLength = buffer[(*i)++];
if (componentLength & 0xC0) {
size_t j;
OFString *suffix;
if (pointerLevel == 0)
@throw [OFInvalidServerReplyException
@throw [OFInvalidServerResponseException
exception];
if (*i >= length)
@throw [OFTruncatedDataException exception];
j = ((componentLength & 0x3F) << 8) | buffer[(*i)++];
if (j == *i - 2)
/* Pointing to itself?! */
@throw [OFInvalidServerReplyException
@throw [OFInvalidServerResponseException
exception];
suffix = parseName(buffer, length, &j,
pointerLevel - 1);
if (components.count == 0)
return suffix;
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OFDNSRecordType recordType, uint32_t TTL, const unsigned char *buffer,
size_t length, size_t i, uint16_t dataLength)
{
if (recordType == OFDNSRecordTypeA && DNSClass == OFDNSClassIN) {
OFSocketAddress address;
if (dataLength != 4)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
memset(&address, 0, sizeof(address));
address.family = OFSocketAddressFamilyIPv4;
address.length = sizeof(address.sockaddr.in);
address.sockaddr.in.sin_family = AF_INET;
memcpy(&address.sockaddr.in.sin_addr.s_addr, buffer + i, 4);
return [[[OFADNSResourceRecord alloc]
initWithName: name
address: &address
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeNS) {
size_t j = i;
OFString *authoritativeHost = parseName(buffer, length, &j,
maxAllowedPointers);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFNSDNSResourceRecord alloc]
initWithName: name
DNSClass: DNSClass
authoritativeHost: authoritativeHost
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeCNAME) {
size_t j = i;
OFString *alias = parseName(buffer, length, &j,
maxAllowedPointers);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFCNAMEDNSResourceRecord alloc]
initWithName: name
DNSClass: DNSClass
alias: alias
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeSOA) {
size_t j = i;
OFString *primaryNameServer = parseName(buffer, length, &j,
maxAllowedPointers);
OFString *responsiblePerson;
uint32_t serialNumber, refreshInterval, retryInterval;
uint32_t expirationInterval, minTTL;
if (j > i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
responsiblePerson = parseName(buffer, length, &j,
maxAllowedPointers);
if (dataLength - (j - i) != 20)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
serialNumber = (buffer[j] << 24) | (buffer[j + 1] << 16) |
(buffer[j + 2] << 8) | buffer[j + 3];
refreshInterval = (buffer[j + 4] << 24) |
(buffer[j + 5] << 16) | (buffer[j + 6] << 8) |
buffer[j + 7];
retryInterval = (buffer[j + 8] << 24) | (buffer[j + 9] << 16) |
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TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypePTR) {
size_t j = i;
OFString *domainName = parseName(buffer, length, &j,
maxAllowedPointers);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFPTRDNSResourceRecord alloc]
initWithName: name
DNSClass: DNSClass
domainName: domainName
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeHINFO) {
size_t j = i;
OFString *CPU = parseString(buffer, length, &j);
OFString *OS;
if (j > i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
OS = parseString(buffer, length, &j);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFHINFODNSResourceRecord alloc]
initWithName: name
DNSClass: DNSClass
CPU: CPU
OS: OS
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeMX) {
uint16_t preference;
size_t j;
OFString *mailExchange;
if (dataLength < 2)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
preference = (buffer[i] << 8) | buffer[i + 1];
j = i + 2;
mailExchange = parseName(buffer, length, &j,
maxAllowedPointers);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFMXDNSResourceRecord alloc]
initWithName: name
DNSClass: DNSClass
preference: preference
mailExchange: mailExchange
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeTXT) {
OFMutableArray *textStrings = [OFMutableArray array];
while (dataLength > 0) {
uint_fast8_t stringLength = buffer[i++];
dataLength--;
if (stringLength > dataLength)
@throw [OFInvalidServerReplyException
@throw [OFInvalidServerResponseException
exception];
[textStrings addObject:
[OFData dataWithItems: buffer + i
count: stringLength]];
i += stringLength;
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} else if (recordType == OFDNSRecordTypeRP) {
size_t j = i;
OFString *mailbox = parseName(buffer, length, &j,
maxAllowedPointers);
OFString *TXTDomainName;
if (j > i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
TXTDomainName = parseName(buffer, length, &j,
maxAllowedPointers);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFRPDNSResourceRecord alloc]
initWithName: name
DNSClass: DNSClass
mailbox: mailbox
TXTDomainName: TXTDomainName
TTL: TTL] autorelease];
} else if (recordType == OFDNSRecordTypeAAAA &&
DNSClass == OFDNSClassIN) {
OFSocketAddress address;
if (dataLength != 16)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
memset(&address, 0, sizeof(address));
address.family = OFSocketAddressFamilyIPv6;
address.length = sizeof(address.sockaddr.in6);
#ifdef AF_INET6
address.sockaddr.in6.sin6_family = AF_INET6;
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} else if (recordType == OFDNSRecordTypeSRV &&
DNSClass == OFDNSClassIN) {
uint16_t priority, weight, port;
size_t j;
OFString *target;
if (dataLength < 6)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
priority = (buffer[i] << 8) | buffer[i + 1];
weight = (buffer[i + 2] << 8) | buffer[i + 3];
port = (buffer[i + 4] << 8) | buffer[i + 5];
j = i + 6;
target = parseName(buffer, length, &j, maxAllowedPointers);
if (j != i + dataLength)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
return [[[OFSRVDNSResourceRecord alloc]
initWithName: name
priority: priority
weight: weight
target: target
port: port
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context->_queryData.count < 12)
@throw [OFInvalidArgumentException exception];
queryDataBuffer = context->_queryData.items;
/* QR */
if ((buffer[2] & 0x80) == 0)
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
/* Opcode */
if ((buffer[2] & 0x78) != (queryDataBuffer[2] & 0x78))
@throw [OFInvalidServerReplyException exception];
@throw [OFInvalidServerResponseException exception];
/* TC */
if (buffer[2] & 0x02) {
OFRunLoopMode runLoopMode;
if (context->_settings->_usesTCP)
@throw [OFTruncatedDataException exception];
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