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: getservent.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 servent *
51getservent(void) {
52	struct net_data *net_data = init();
53
54	return (getservent_p(net_data));
55}
56
57struct servent *
58getservbyname(const char *name, const char *proto) {
59	struct net_data *net_data = init();
60
61	return (getservbyname_p(name, proto, net_data));
62}
63
64struct servent *
65getservbyport(int port, const char *proto) {
66	struct net_data *net_data = init();
67
68	return (getservbyport_p(port, proto, net_data));
69}
70
71void
72setservent(int stayopen) {
73	struct net_data *net_data = init();
74
75	setservent_p(stayopen, net_data);
76}
77
78void
79endservent() {
80	struct net_data *net_data = init();
81
82	endservent_p(net_data);
83}
84
85/* Shared private. */
86
87struct servent *
88getservent_p(struct net_data *net_data) {
89	struct irs_sv *sv;
90
91	if (!net_data || !(sv = net_data->sv))
92		return (NULL);
93	net_data->sv_last = (*sv->next)(sv);
94	return (net_data->sv_last);
95}
96
97struct servent *
98getservbyname_p(const char *name, const char *proto,
99		struct net_data *net_data) {
100	struct irs_sv *sv;
101	char **sap;
102
103	if (!net_data || !(sv = net_data->sv))
104		return (NULL);
105	if (net_data->sv_stayopen && net_data->sv_last)
106		if (!proto || !strcmp(net_data->sv_last->s_proto, proto)) {
107			if (!strcmp(net_data->sv_last->s_name, name))
108				return (net_data->sv_last);
109			for (sap = net_data->sv_last->s_aliases;
110			     sap && *sap; sap++)
111				if (!strcmp(name, *sap))
112					return (net_data->sv_last);
113		}
114	net_data->sv_last = (*sv->byname)(sv, name, proto);
115	if (!net_data->sv_stayopen)
116		endservent();
117	return (net_data->sv_last);
118}
119
120struct servent *
121getservbyport_p(int port, const char *proto, struct net_data *net_data) {
122	struct irs_sv *sv;
123
124	if (!net_data || !(sv = net_data->sv))
125		return (NULL);
126	if (net_data->sv_stayopen && net_data->sv_last)
127		if (port == net_data->sv_last->s_port &&
128		    ( !proto ||
129		     !strcmp(net_data->sv_last->s_proto, proto)))
130			return (net_data->sv_last);
131	net_data->sv_last = (*sv->byport)(sv, port, proto);
132	return (net_data->sv_last);
133}
134
135void
136setservent_p(int stayopen, struct net_data *net_data) {
137	struct irs_sv *sv;
138
139	if (!net_data || !(sv = net_data->sv))
140		return;
141	(*sv->rewind)(sv);
142	net_data->sv_stayopen = (stayopen != 0);
143	if (stayopen == 0)
144		net_data_minimize(net_data);
145}
146
147void
148endservent_p(struct net_data *net_data) {
149	struct irs_sv *sv;
150
151	if ((net_data != NULL) && ((sv = net_data->sv) != NULL))
152		(*sv->minimize)(sv);
153}
154
155/* Private */
156
157static struct net_data *
158init() {
159	struct net_data *net_data;
160
161	if (!(net_data = net_data_init(NULL)))
162		goto error;
163	if (!net_data->sv) {
164		net_data->sv = (*net_data->irs->sv_map)(net_data->irs);
165
166		if (!net_data->sv || !net_data->res) {
167 error:
168			errno = EIO;
169			return (NULL);
170		}
171		(*net_data->sv->res_set)(net_data->sv, net_data->res, NULL);
172	}
173
174	return (net_data);
175}
176
177#endif /*__BIND_NOSTATIC*/
178
179/*! \file */
180