177 lines
3.9 KiB
C
177 lines
3.9 KiB
C
/* $NetBSD: getprotoent.c,v 1.2 2002/06/20 11:43:04 itojun Exp $ */
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/*
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* Copyright (c) 1996,1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#if !defined(LINT) && !defined(CODECENTER)
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static const char rcsid[] = "Id: getprotoent.c,v 1.16 2001/11/01 07:34:33 marka Exp";
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#endif
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/* Imports */
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#include "port_before.h"
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#if !defined(__BIND_NOSTATIC)
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <errno.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <string.h>
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#include <irs.h>
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#include "port_after.h"
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#include "irs_data.h"
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/* Forward */
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static struct net_data *init(void);
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/* Public */
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struct protoent *
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getprotoent() {
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struct net_data *net_data = init();
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return (getprotoent_p(net_data));
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}
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struct protoent *
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getprotobyname(const char *name) {
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struct net_data *net_data = init();
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return (getprotobyname_p(name, net_data));
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}
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struct protoent *
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getprotobynumber(int proto) {
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struct net_data *net_data = init();
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return (getprotobynumber_p(proto, net_data));
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}
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void
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setprotoent(int stayopen) {
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struct net_data *net_data = init();
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setprotoent_p(stayopen, net_data);
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}
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void
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endprotoent() {
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struct net_data *net_data = init();
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endprotoent_p(net_data);
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}
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/* Shared private. */
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struct protoent *
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getprotoent_p(struct net_data *net_data) {
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struct irs_pr *pr;
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if (!net_data || !(pr = net_data->pr))
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return (NULL);
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net_data->pr_last = (*pr->next)(pr);
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return (net_data->pr_last);
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}
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struct protoent *
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getprotobyname_p(const char *name, struct net_data *net_data) {
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struct irs_pr *pr;
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char **pap;
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if (!net_data || !(pr = net_data->pr))
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return (NULL);
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if (net_data->pr_stayopen && net_data->pr_last) {
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if (!strcmp(net_data->pr_last->p_name, name))
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return (net_data->pr_last);
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for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++)
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if (!strcmp(name, *pap))
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return (net_data->pr_last);
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}
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net_data->pr_last = (*pr->byname)(pr, name);
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if (!net_data->pr_stayopen)
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endprotoent();
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return (net_data->pr_last);
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}
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struct protoent *
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getprotobynumber_p(int proto, struct net_data *net_data) {
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struct irs_pr *pr;
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if (!net_data || !(pr = net_data->pr))
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return (NULL);
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if (net_data->pr_stayopen && net_data->pr_last)
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if (net_data->pr_last->p_proto == proto)
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return (net_data->pr_last);
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net_data->pr_last = (*pr->bynumber)(pr, proto);
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if (!net_data->pr_stayopen)
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endprotoent();
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return (net_data->pr_last);
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}
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void
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setprotoent_p(int stayopen, struct net_data *net_data) {
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struct irs_pr *pr;
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if (!net_data || !(pr = net_data->pr))
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return;
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(*pr->rewind)(pr);
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net_data->pr_stayopen = (stayopen != 0);
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if (stayopen == 0)
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net_data_minimize(net_data);
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}
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void
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endprotoent_p(struct net_data *net_data) {
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struct irs_pr *pr;
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if ((net_data != NULL) && ((pr = net_data->pr) != NULL))
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(*pr->minimize)(pr);
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}
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/* Private */
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static struct net_data *
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init() {
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struct net_data *net_data;
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if (!(net_data = net_data_init(NULL)))
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goto error;
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if (!net_data->pr) {
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net_data->pr = (*net_data->irs->pr_map)(net_data->irs);
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if (!net_data->pr || !net_data->res) {
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error:
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errno = EIO;
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return (NULL);
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}
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(*net_data->pr->res_set)(net_data->pr, net_data->res, NULL);
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}
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return (net_data);
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}
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#endif /*__BIND_NOSTATIC*/
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