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: 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
46 static struct net_data *init(void);
47
48 /* Public */
49
50 struct protoent *
getprotoent()51 getprotoent() {
52 struct net_data *net_data = init();
53
54 return (getprotoent_p(net_data));
55 }
56
57 struct protoent *
getprotobyname(const char * name)58 getprotobyname(const char *name) {
59 struct net_data *net_data = init();
60
61 return (getprotobyname_p(name, net_data));
62 }
63
64 struct protoent *
getprotobynumber(int proto)65 getprotobynumber(int proto) {
66 struct net_data *net_data = init();
67
68 return (getprotobynumber_p(proto, net_data));
69 }
70
71 void
setprotoent(int stayopen)72 setprotoent(int stayopen) {
73 struct net_data *net_data = init();
74
75 setprotoent_p(stayopen, net_data);
76 }
77
78 void
endprotoent()79 endprotoent() {
80 struct net_data *net_data = init();
81
82 endprotoent_p(net_data);
83 }
84
85 /* Shared private. */
86
87 struct protoent *
getprotoent_p(struct net_data * net_data)88 getprotoent_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
97 struct protoent *
getprotobyname_p(const char * name,struct net_data * net_data)98 getprotobyname_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
117 struct protoent *
getprotobynumber_p(int proto,struct net_data * net_data)118 getprotobynumber_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
132 void
setprotoent_p(int stayopen,struct net_data * net_data)133 setprotoent_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
144 void
endprotoent_p(struct net_data * net_data)145 endprotoent_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
154 static struct net_data *
init()155 init() {
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