* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")

/* $NetBSD: getprotoent.c,v 1.1.1.2 2012/09/09 16:07:54 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: getprotoent.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 protoent *
getprotoent() {
struct net_data *net_data = init();

return (getprotoent_p(net_data));
}

struct protoent *
getprotobyname(const char *name) {
struct net_data *net_data = init();

return (getprotobyname_p(name, net_data));
}

struct protoent *
getprotobynumber(int proto) {
struct net_data *net_data = init();

return (getprotobynumber_p(proto, net_data));
}

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

setprotoent_p(stayopen, net_data);
}

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

endprotoent_p(net_data);
}

/* Shared private. */

struct protoent *
getprotoent_p(struct net_data *net_data) {
struct irs_pr *pr;

if (!net_data || !(pr = net_data->pr))
return (NULL);
net_data->pr_last = (*pr->next)(pr);
return (net_data->pr_last);
}

struct protoent *
getprotobyname_p(const char *name, struct net_data *net_data) {
struct irs_pr *pr;
char **pap;

if (!net_data || !(pr = net_data->pr))
return (NULL);
if (net_data->pr_stayopen && net_data->pr_last) {
if (!strcmp(net_data->pr_last->p_name, name))
return (net_data->pr_last);
for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++)
if (!strcmp(name, *pap))
return (net_data->pr_last);
}
net_data->pr_last = (*pr->byname)(pr, name);
if (!net_data->pr_stayopen)
endprotoent();
return (net_data->pr_last);
}

struct protoent *
getprotobynumber_p(int proto, struct net_data *net_data) {
struct irs_pr *pr;

if (!net_data || !(pr = net_data->pr))
return (NULL);
if (net_data->pr_stayopen && net_data->pr_last)
if (net_data->pr_last->p_proto == proto)
return (net_data->pr_last);
net_data->pr_last = (*pr->bynumber)(pr, proto);
if (!net_data->pr_stayopen)
endprotoent();
return (net_data->pr_last);
}

void
setprotoent_p(int stayopen, struct net_data *net_data) {
struct irs_pr *pr;

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

void
endprotoent_p(struct net_data *net_data) {
struct irs_pr *pr;

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

/* Private */

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

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

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

return (net_data);
}

#endif /*__BIND_NOSTATIC*/

/*! \file */