usr/src/include/resolv.h

/*      resolv.h        4.1     85/03/01        */
/*
 * Global defines and variables for resolver stub.
 */

/*
 * Resolver configuration file. Contains the address of the
 * inital name server to query and the default domain for
 * non fully qualified domain names.
 */
#define CONFFILE "/usr/local/lib/resolv.conf"

struct state {
        int     retrans;                /* retransmition time interval */
        int     retry;                  /* number of times to retransmit */
        int     options;                /* option flags - see below. */
        struct  sockaddr_in nsaddr;     /* address of name server */
        u_short id;                     /* current packet id */
        char    defdname[MAXDNAME];     /* default domain */
};

/*
 * Resolver options
 */
#define RES_INIT        0x001           /* address initialized */
#define RES_DEBUG       0x002           /* print debug messages */
#define RES_AAONLY      0x004           /* authoritative answers only */
#define RES_USEVC       0x008           /* use virtual circuit */
#define RES_PRIMARY     0x010           /* query primary server only */
#define RES_IGNTC       0x020           /* ignore trucation errors */
#define RES_RECURSE     0x040           /* recursion desired */
#define RES_DEFNAMES    0x080           /* use default domain name */

extern struct state _res;
extern char *p_cdname(), *p_rr(), *p_type(), *p_class();