// DNS resource records
#define T_A 1					// IPv4 address
#define T_NS 2					// Name Server
#define T_CNAME 5				// Cannonical name
#define T_SOA 6					// State of Authority
#define T_PTR 12				// Domain name pointer
#define T_MX 15					// Mail exchange
#define T_TXT 16				// Text record
#define T_AAAA 28				// IPv6 address

void resolve(unsigned char* buf, char* hostname, char* dns_ip, int query_type);
void print_packet(unsigned char* buf);