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/*
* Copyright (c) 1996 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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 char rcsid[] = "$Id: getprotoent.c,v 1.9 1997/12/04 04:57:53 halley Exp $";
#endif
/* Imports */
#include "port_before.h"
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <irs.h>
#include "port_after.h"
#include "irs_data.h"
/* Forward */
static struct irs_pr * init(void);
/* Public */
struct protoent *
getprotoent() {
struct irs_pr *pr = init();
if (!pr)
return (NULL);
net_data.pr_last = (*pr->next)(pr);
return (net_data.pr_last);
}
struct protoent *
getprotobyname(const char *name) {
struct irs_pr *pr = init();
char **pap;
if (!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(int proto) {
struct irs_pr *pr = init();
if (!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(int stayopen) {
struct irs_pr *pr = init();
if (!pr)
return;
(*pr->rewind)(pr);
net_data.pr_stayopen = (stayopen != 0);
}
void
endprotoent() {
struct irs_pr *pr = init();
if (pr != NULL)
(*pr->minimize)(pr);
}
/* Private */
static struct irs_pr *
init() {
if (!net_data_init())
goto error;
if (!net_data.pr)
net_data.pr = (*net_data.irs->pr_map)(net_data.irs);
if (!net_data.pr) {
error:
errno = EIO;
return (NULL);
}
return (net_data.pr);
}
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