/*      $NetBSD: getservent.c,v 1.1.1.2 2012/09/09 16:07:50 christos Exp $      */

/*
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
* Copyright (c) 1996,1999 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#if !defined(LINT) && !defined(CODECENTER)
static const char rcsid[] = "Id: getservent.c,v 1.4 2005/04/27 04:56:26 sra Exp ";
#endif

/* Imports */

#include "port_before.h"

#if !defined(__BIND_NOSTATIC)

#include <sys/types.h>

#include <netinet/in.h>
#include <arpa/nameser.h>

#include <errno.h>
#include <resolv.h>
#include <stdio.h>
#include <string.h>

#include <irs.h>

#include "port_after.h"

#include "irs_data.h"

/* Forward */

static struct net_data *init(void);

/* Public */

struct servent *
getservent(void) {
       struct net_data *net_data = init();

       return (getservent_p(net_data));
}

struct servent *
getservbyname(const char *name, const char *proto) {
       struct net_data *net_data = init();

       return (getservbyname_p(name, proto, net_data));
}

struct servent *
getservbyport(int port, const char *proto) {
       struct net_data *net_data = init();

       return (getservbyport_p(port, proto, net_data));
}

void
setservent(int stayopen) {
       struct net_data *net_data = init();

       setservent_p(stayopen, net_data);
}

void
endservent() {
       struct net_data *net_data = init();

       endservent_p(net_data);
}

/* Shared private. */

struct servent *
getservent_p(struct net_data *net_data) {
       struct irs_sv *sv;

       if (!net_data || !(sv = net_data->sv))
               return (NULL);
       net_data->sv_last = (*sv->next)(sv);
       return (net_data->sv_last);
}

struct servent *
getservbyname_p(const char *name, const char *proto,
               struct net_data *net_data) {
       struct irs_sv *sv;
       char **sap;

       if (!net_data || !(sv = net_data->sv))
               return (NULL);
       if (net_data->sv_stayopen && net_data->sv_last)
               if (!proto || !strcmp(net_data->sv_last->s_proto, proto)) {
                       if (!strcmp(net_data->sv_last->s_name, name))
                               return (net_data->sv_last);
                       for (sap = net_data->sv_last->s_aliases;
                            sap && *sap; sap++)
                               if (!strcmp(name, *sap))
                                       return (net_data->sv_last);
               }
       net_data->sv_last = (*sv->byname)(sv, name, proto);
       if (!net_data->sv_stayopen)
               endservent();
       return (net_data->sv_last);
}

struct servent *
getservbyport_p(int port, const char *proto, struct net_data *net_data) {
       struct irs_sv *sv;

       if (!net_data || !(sv = net_data->sv))
               return (NULL);
       if (net_data->sv_stayopen && net_data->sv_last)
               if (port == net_data->sv_last->s_port &&
                   ( !proto ||
                    !strcmp(net_data->sv_last->s_proto, proto)))
                       return (net_data->sv_last);
       net_data->sv_last = (*sv->byport)(sv, port, proto);
       return (net_data->sv_last);
}

void
setservent_p(int stayopen, struct net_data *net_data) {
       struct irs_sv *sv;

       if (!net_data || !(sv = net_data->sv))
               return;
       (*sv->rewind)(sv);
       net_data->sv_stayopen = (stayopen != 0);
       if (stayopen == 0)
               net_data_minimize(net_data);
}

void
endservent_p(struct net_data *net_data) {
       struct irs_sv *sv;

       if ((net_data != NULL) && ((sv = net_data->sv) != NULL))
               (*sv->minimize)(sv);
}

/* Private */

static struct net_data *
init() {
       struct net_data *net_data;

       if (!(net_data = net_data_init(NULL)))
               goto error;
       if (!net_data->sv) {
               net_data->sv = (*net_data->irs->sv_map)(net_data->irs);

               if (!net_data->sv || !net_data->res) {
error:
                       errno = EIO;
                       return (NULL);
               }
               (*net_data->sv->res_set)(net_data->sv, net_data->res, NULL);
       }

       return (net_data);
}

#endif /*__BIND_NOSTATIC*/

/*! \file */

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