38 lines
997 B
C++
38 lines
997 B
C++
#ifndef DNS_PARSER_H
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#define DNS_PARSER_H
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#include "common.h"
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#include <cstdint>
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#include <string>
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class DNSParser {
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public:
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struct DNSQuery {
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std::string domain;
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uint16_t qtype;
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uint16_t qclass;
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bool is_query;
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bool is_valid;
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DNSQuery() : qtype(0), qclass(0), is_query(false), is_valid(false) {}
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};
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// Parse DNS packet and extract query information
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static DNSQuery ParsePacket(const uint8_t* packet, size_t length);
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private:
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// Parse DNS name in label format
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static std::string ParseDomainName(const uint8_t* packet,
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size_t packet_len,
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size_t& offset,
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int depth = 0);
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// Validate DNS header
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static bool ValidateDNSHeader(const uint8_t* packet, size_t length);
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// Check if this is a query packet (QR bit = 0)
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static bool IsQueryPacket(const uint8_t* packet);
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};
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#endif // DNS_PARSER_H
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