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 /* Imports */
19
20 #include "port_before.h"
21
22 #if !defined(__BIND_NOSTATIC)
23
24 #include <sys/types.h>
25
26 #include <netinet/in.h>
27 #include <arpa/nameser.h>
28
29 #include <errno.h>
30 #include <resolv.h>
31 #include <stdio.h>
32 #include <string.h>
33
34 #include <irs.h>
35
36 #include "port_after.h"
37
38 #include "irs_data.h"
39
40 /* Forward */
41
42 static struct net_data *init(void);
43
44 /* Public */
45
46 struct protoent *
getprotoent()47 getprotoent() {
48 struct net_data *net_data = init();
49
50 return (getprotoent_p(net_data));
51 }
52
53 struct protoent *
getprotobyname(const char * name)54 getprotobyname(const char *name) {
55 struct net_data *net_data = init();
56
57 return (getprotobyname_p(name, net_data));
58 }
59
60 struct protoent *
getprotobynumber(int proto)61 getprotobynumber(int proto) {
62 struct net_data *net_data = init();
63
64 return (getprotobynumber_p(proto, net_data));
65 }
66
67 void
setprotoent(int stayopen)68 setprotoent(int stayopen) {
69 struct net_data *net_data = init();
70
71 setprotoent_p(stayopen, net_data);
72 }
73
74 void
endprotoent()75 endprotoent() {
76 struct net_data *net_data = init();
77
78 endprotoent_p(net_data);
79 }
80
81 /* Shared private. */
82
83 struct protoent *
getprotoent_p(struct net_data * net_data)84 getprotoent_p(struct net_data *net_data) {
85 struct irs_pr *pr;
86
87 if (!net_data || !(pr = net_data->pr))
88 return (NULL);
89 net_data->pr_last = (*pr->next)(pr);
90 return (net_data->pr_last);
91 }
92
93 struct protoent *
getprotobyname_p(const char * name,struct net_data * net_data)94 getprotobyname_p(const char *name, struct net_data *net_data) {
95 struct irs_pr *pr;
96 char **pap;
97
98 if (!net_data || !(pr = net_data->pr))
99 return (NULL);
100 if (net_data->pr_stayopen && net_data->pr_last) {
101 if (!strcmp(net_data->pr_last->p_name, name))
102 return (net_data->pr_last);
103 for (pap = net_data->pr_last->p_aliases; pap && *pap; pap++)
104 if (!strcmp(name, *pap))
105 return (net_data->pr_last);
106 }
107 net_data->pr_last = (*pr->byname)(pr, name);
108 if (!net_data->pr_stayopen)
109 endprotoent();
110 return (net_data->pr_last);
111 }
112
113 struct protoent *
getprotobynumber_p(int proto,struct net_data * net_data)114 getprotobynumber_p(int proto, struct net_data *net_data) {
115 struct irs_pr *pr;
116
117 if (!net_data || !(pr = net_data->pr))
118 return (NULL);
119 if (net_data->pr_stayopen && net_data->pr_last)
120 if (net_data->pr_last->p_proto == proto)
121 return (net_data->pr_last);
122 net_data->pr_last = (*pr->bynumber)(pr, proto);
123 if (!net_data->pr_stayopen)
124 endprotoent();
125 return (net_data->pr_last);
126 }
127
128 void
setprotoent_p(int stayopen,struct net_data * net_data)129 setprotoent_p(int stayopen, struct net_data *net_data) {
130 struct irs_pr *pr;
131
132 if (!net_data || !(pr = net_data->pr))
133 return;
134 (*pr->rewind)(pr);
135 net_data->pr_stayopen = (stayopen != 0);
136 if (stayopen == 0)
137 net_data_minimize(net_data);
138 }
139
140 void
endprotoent_p(struct net_data * net_data)141 endprotoent_p(struct net_data *net_data) {
142 struct irs_pr *pr;
143
144 if ((net_data != NULL) && ((pr = net_data->pr) != NULL))
145 (*pr->minimize)(pr);
146 }
147
148 /* Private */
149
150 static struct net_data *
init()151 init() {
152 struct net_data *net_data;
153
154 if (!(net_data = net_data_init(NULL)))
155 goto error;
156 if (!net_data->pr) {
157 net_data->pr = (*net_data->irs->pr_map)(net_data->irs);
158
159 if (!net_data->pr || !net_data->res) {
160 error:
161 errno = EIO;
162 return (NULL);
163 }
164 (*net_data->pr->res_set)(net_data->pr, net_data->res, NULL);
165 }
166
167 return (net_data);
168 }
169
170 #endif /*__BIND_NOSTATIC*/
171
172 /*! \file */
173