text: #ifndef _RESOLV_H
  #define _RESOLV_H
  
  #include <stdint.h>
  #include <arpa/nameser.h>
  #include <netinet/in.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #define MAXNS			3
  #define MAXDFLSRCH		3
  #define MAXDNSRCH		6
  #define LOCALDOMAINPARTS	2
  
  #define RES_TIMEOUT		5
  #define MAXRESOLVSORT		10
  #define RES_MAXNDOTS		15
  #define RES_MAXRETRANS		30
  #define RES_MAXRETRY		5
  #define RES_DFLRETRY		2
  #define RES_MAXTIME		65535
  
  /* unused; purely for broken apps */
  typedef struct __res_state {
  	int retrans;
  	int retry;
  	unsigned long options;
  	int nscount;
  	struct sockaddr_in nsaddr_list[MAXNS];
  # define nsaddr	nsaddr_list[0]
  	unsigned short id;
  	char *dnsrch[MAXDNSRCH+1];
  	char defdname[256];
  	unsigned long pfcode;
  	unsigned ndots:4;
  	unsigned nsort:4;
  	unsigned ipv6_unavail:1;
  	unsigned unused:23;
  	struct {
  		struct in_addr addr;
  		uint32_t mask;
  	} sort_list[MAXRESOLVSORT];
  	void *qhook;
  	void *rhook;
  	int res_h_errno;
  	int _vcsock;
  	unsigned _flags;
  	union {
  		char pad[52];
  		struct {
  			uint16_t		nscount;
  			uint16_t		nsmap[MAXNS];
  			int			nssocks[MAXNS];
  			uint16_t		nscount6;
  			uint16_t		nsinit;
  			struct sockaddr_in6	*nsaddrs[MAXNS];
  			unsigned int		_initstamp[2];
  		} _ext;
  	} _u;
  } *res_state;
  
  #define	__RES	19991006
  
  #ifndef _PATH_RESCONF
  #define _PATH_RESCONF        "/etc/resolv.conf"
  #endif
  
  struct res_sym {
  	int number;
  	char *name;
  	char *humanname;
  };
  
  #define	RES_F_VC	0x00000001
  #define	RES_F_CONN	0x00000002
  #define RES_F_EDNS0ERR	0x00000004
  
  #define	RES_EXHAUSTIVE	0x00000001
  
  #define RES_INIT	0x00000001
  #define RES_DEBUG	0x00000002
  #define RES_AAONLY	0x00000004
  #define RES_USEVC	0x00000008
  #define RES_PRIMARY	0x00000010
  #define RES_IGNTC	0x00000020
  #define RES_RECURSE	0x00000040
  #define RES_DEFNAMES	0x00000080
  #define RES_STAYOPEN	0x00000100
  #define RES_DNSRCH	0x00000200
  #define	RES_INSECURE1	0x00000400
  #define	RES_INSECURE2	0x00000800
  #define	RES_NOALIASES	0x00001000
  #define	RES_USE_INET6	0x00002000
  #define RES_ROTATE	0x00004000
  #define	RES_NOCHECKNAME	0x00008000
  #define	RES_KEEPTSIG	0x00010000
  #define	RES_BLAST	0x00020000
  #define RES_USEBSTRING	0x00040000
  #define RES_NOIP6DOTINT	0x00080000
  #define RES_USE_EDNS0	0x00100000
  #define RES_SNGLKUP	0x00200000
  #define RES_SNGLKUPREOP	0x00400000
  #define RES_USE_DNSSEC	0x00800000
  
  #define RES_DEFAULT	(RES_RECURSE|RES_DEFNAMES|RES_DNSRCH|RES_NOIP6DOTINT)
  
  #define RES_PRF_STATS	0x00000001
  #define RES_PRF_UPDATE	0x00000002
  #define RES_PRF_CLASS   0x00000004
  #define RES_PRF_CMD	0x00000008
  #define RES_PRF_QUES	0x00000010
  #define RES_PRF_ANS	0x00000020
  #define RES_PRF_AUTH	0x00000040
  #define RES_PRF_ADD	0x00000080
  #define RES_PRF_HEAD1	0x00000100
  #define RES_PRF_HEAD2	0x00000200
  #define RES_PRF_TTLID	0x00000400
  #define RES_PRF_HEADX	0x00000800
  #define RES_PRF_QUERY	0x00001000
  #define RES_PRF_REPLY	0x00002000
  #define RES_PRF_INIT	0x00004000
  
  struct __res_state *__res_state(void);
  #define _res (*__res_state())
  
  struct rrec;
  
  int res_init(void);
  int res_query(const char *, int, int, unsigned char *, int);
  int res_querydomain(const char *, const char *, int, int, unsigned char *, int);
  int res_search(const char *, int, int, unsigned char *, int);
  int res_mkquery(int, const char *, int, int, char *, int, struct rrec *, char *, int);
  int res_send(const char *, int, char *, int);
  int dn_comp(unsigned char *, unsigned char *, int, unsigned char **, unsigned char *, unsigned char **);
  int dn_expand(unsigned char *, unsigned char *, unsigned char *, unsigned char *, int);
  int dn_skipname(const unsigned char *, const unsigned char *);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  