1/*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996,1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#if !defined(LINT) && !defined(CODECENTER)
19static const char rcsid[] = "$Id: getprotoent.c,v 1.4 2005/04/27 04:56:26 sra Exp $";
20#endif
21
22/* Imports */
23
24#include "port_before.h"
25
26#if !defined(__BIND_NOSTATIC)
27
28#include <sys/types.h>
29
30#include <netinet/in.h>
31#include <arpa/nameser.h>
32
33#include <errno.h>
34#include <resolv.h>
35#include <stdio.h>
36#include <string.h>
37
38#include <irs.h>
39
40#include "port_after.h"
41
42#include "irs_data.h"
43
44/* Forward */
45
46static struct net_data *init(void);
47
48/* Public */
49
50struct protoent *
51getprotoent() {
52	struct net_data *net_data = init();
53
54	return (getprotoent_p(net_data));
55}
56
57struct protoent *
58getprotobyname(const char *name) {
59	struct net_data *net_data = init();
60
61	return (getprotobyname_p(name, net_data));
62}
63
64struct protoent *
65getprotobynumber(int proto) {
66	struct net_data *net_data = init();
67
68	return (getprotobynumber_p(proto, net_data));
69}
70
71void
72setprotoent(int stayopen) {
73	struct net_data *net_data = init();
74
75	setprotoent_p(stayopen, net_data);
76}
77
78void
79endprotoent() {
80	struct net_data *net_data = init();
81
82	endprotoent_p(net_data);
83}
84
85/* Shared private. */
86
87struct protoent *
88getprotoent_p(struct net_data *net_data) {
89	struct irs_pr *pr;
90
91	if (!net_data || !(pr = net_data->pr))
92		return (NULL);
93	net_data->pr_last = (*pr->next)(pr);
94	return (net_data->pr_last);
95}
96
97struct protoent *
98getprotobyname_p(const char *name, struct net_data *net_data) {
99	struct irs_pr *pr;
100	char **pap;
101
102	if (!net_data || !(pr = net_data->pr))
103		return (NULL);
104	if (net_data->pr_stayopen && net_data->pr_last) {
105		if (!strcmp(net_data->pr_last->p_name, name))
106			return (net_data->pr_last);
107		for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++)
108			if (!strcmp(name, *pap))
109				return (net_data->pr_last);
110	}
111	net_data->pr_last = (*pr->byname)(pr, name);
112	if (!net_data->pr_stayopen)
113		endprotoent();
114	return (net_data->pr_last);
115}
116
117struct protoent *
118getprotobynumber_p(int proto, struct net_data *net_data) {
119	struct irs_pr *pr;
120
121	if (!net_data || !(pr = net_data->pr))
122		return (NULL);
123	if (net_data->pr_stayopen && net_data->pr_last)
124		if (net_data->pr_last->p_proto == proto)
125			return (net_data->pr_last);
126	net_data->pr_last = (*pr->bynumber)(pr, proto);
127	if (!net_data->pr_stayopen)
128		endprotoent();
129	return (net_data->pr_last);
130}
131
132void
133setprotoent_p(int stayopen, struct net_data *net_data) {
134	struct irs_pr *pr;
135
136	if (!net_data || !(pr = net_data->pr))
137		return;
138	(*pr->rewind)(pr);
139	net_data->pr_stayopen = (stayopen != 0);
140	if (stayopen == 0)
141		net_data_minimize(net_data);
142}
143
144void
145endprotoent_p(struct net_data *net_data) {
146	struct irs_pr *pr;
147
148	if ((net_data != NULL) && ((pr = net_data->pr) != NULL))
149		(*pr->minimize)(pr);
150}
151
152/* Private */
153
154static struct net_data *
155init() {
156	struct net_data *net_data;
157
158	if (!(net_data = net_data_init(NULL)))
159		goto error;
160	if (!net_data->pr) {
161		net_data->pr = (*net_data->irs->pr_map)(net_data->irs);
162
163		if (!net_data->pr || !net_data->res) {
164 error:
165			errno = EIO;
166			return (NULL);
167		}
168		(*net_data->pr->res_set)(net_data->pr, net_data->res, NULL);
169	}
170
171	return (net_data);
172}
173
174#endif /*__BIND_NOSTATIC*/
175
176/*! \file */
177