usr/src/include/netdb.h

/*-
 * Copyright (c) 1980, 1983, 1988 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)netdb.h     5.13 (Berkeley) %G%
 */

#define _PATH_HEQUIV    "/etc/hosts.equiv"
#define _PATH_HOSTS     "/etc/hosts"
#define _PATH_NETWORKS  "/etc/networks"
#define _PATH_PROTOCOLS "/etc/protocols"
#define _PATH_SERVICES  "/etc/services"

/*
 * Structures returned by network data base library.  All addresses are
 * supplied in host order, and returned in network order (suitable for
 * use in system calls).
 */
struct  hostent {
        char    *h_name;        /* official name of host */
        char    **h_aliases;    /* alias list */
        int     h_addrtype;     /* host address type */
        int     h_length;       /* length of address */
        char    *h_addr;        /* address */
};

/*
 * Assumption here is that a network number
 * fits in 32 bits -- probably a poor one.
 */
struct  netent {
        char            *n_name;        /* official name of net */
        char            **n_aliases;    /* alias list */
        int             n_addrtype;     /* net address type */
        unsigned long   n_net;          /* network # */
};

struct  servent {
        char    *s_name;        /* official service name */
        char    **s_aliases;    /* alias list */
        int     s_port;         /* port # */
        char    *s_proto;       /* protocol to use */
};

struct  protoent {
        char    *p_name;        /* official protocol name */
        char    **p_aliases;    /* alias list */
        int     p_proto;        /* protocol # */
};

/*
 * Error return codes from gethostbyname() and gethostbyaddr()
 * (left in extern int h_errno).
 */

#define HOST_NOT_FOUND  1 /* Authoritative Answer Host not found */
#define TRY_AGAIN       2 /* Non-Authoritive Host not found, or SERVERFAIL */
#define NO_RECOVERY     3 /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
#define NO_DATA         4 /* Valid name, no data record of requested type */
#define NO_ADDRESS      NO_DATA         /* no address, look for MX record */

#include <sys/cdefs.h>

__BEGIN_DECLS
void            endhostent __P((void));
void            endnetent __P((void));
void            endprotoent __P((void));
void            endservent __P((void));
struct hostent  *gethostbyaddr __P((const char *, int, int));
struct hostent  *gethostbyname __P((char *));
/* struct hostent *gethostent __P((void)); */
struct netent   *getnetbyaddr __P((long, int)); /* u_long? */
struct netent   *getnetbyname __P((const char *));
struct netent   *getnetent __P((void));
struct protoent *getprotobyname __P((const char *));
struct protoent *getprotobynumber __P((int));
struct protoent *getprotoent __P((void));
struct servent  *getservbyname __P((const char *, const char *));
struct servent  *getservbyport __P((int, const char *));
struct servent  *getservent __P((void));
void            herror __P((const char *));
void            sethostent __P((int));
/* void         sethostfile __P((const char *)); */
void            setnetent __P((int));
void            setprotoent __P((int));
void            setservent __P((int));
__END_DECLS