// DNS resource records
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#define T_A 1 // IPv4 address
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#define T_NS 2 // Name Server
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#define T_CNAME 5 // Cannonical name
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#define T_SOA 6 // State of Authority
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#define T_PTR 12 // Domain name pointer
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#define T_MX 15 // Mail exchange
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#define T_TXT 16 // Text record
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#define T_AAAA 28 // IPv6 address
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struct timespec resolve(unsigned char* buf, char* hostname, char* dns_ip,
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int query_type);
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void print_packet(unsigned char* buf);
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