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)
19 static 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
46 static struct net_data *init(void);
47
48 /* Public */
49
50 struct servent *
getservent(void)51 getservent(void) {
52 struct net_data *net_data = init();
53
54 return (getservent_p(net_data));
55 }
56
57 struct servent *
getservbyname(const char * name,const char * proto)58 getservbyname(const char *name, const char *proto) {
59 struct net_data *net_data = init();
60
61 return (getservbyname_p(name, proto, net_data));
62 }
63
64 struct servent *
getservbyport(int port,const char * proto)65 getservbyport(int port, const char *proto) {
66 struct net_data *net_data = init();
67
68 return (getservbyport_p(port, proto, net_data));
69 }
70
71 void
setservent(int stayopen)72 setservent(int stayopen) {
73 struct net_data *net_data = init();
74
75 setservent_p(stayopen, net_data);
76 }
77
78 void
endservent()79 endservent() {
80 struct net_data *net_data = init();
81
82 endservent_p(net_data);
83 }
84
85 /* Shared private. */
86
87 struct servent *
getservent_p(struct net_data * net_data)88 getservent_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
97 struct servent *
getservbyname_p(const char * name,const char * proto,struct net_data * net_data)98 getservbyname_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
120 struct servent *
getservbyport_p(int port,const char * proto,struct net_data * net_data)121 getservbyport_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
135 void
setservent_p(int stayopen,struct net_data * net_data)136 setservent_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
147 void
endservent_p(struct net_data * net_data)148 endservent_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
157 static struct net_data *
init()158 init() {
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