1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Rentrant (MT-safe) getrpcYY interfaces.
29 */
30
31 #include "mt.h"
32 #include <ctype.h>
33 #include <nss_dbdefs.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <rpc/rpcent.h>
37
38 extern int str2rpcent(const char *, int, void *, char *, int);
39
40 static int rpc_stayopen; /* Unsynchronized, but it affects only */
41 /* efficiency, not correctness */
42 static DEFINE_NSS_DB_ROOT(db_root);
43 static DEFINE_NSS_GETENT(context);
44
45 void
_nss_initf_rpc(nss_db_params_t * p)46 _nss_initf_rpc(nss_db_params_t *p)
47 {
48 p->name = NSS_DBNAM_RPC;
49 p->default_config = NSS_DEFCONF_RPC;
50 }
51
52 struct rpcent *
getrpcbyname_r(const char * name,struct rpcent * result,char * buffer,int buflen)53 getrpcbyname_r(const char *name, struct rpcent *result, char *buffer,
54 int buflen)
55 {
56 nss_XbyY_args_t arg;
57 nss_status_t res;
58
59 if (name == (const char *)NULL) {
60 errno = ERANGE;
61 return (NULL);
62 }
63 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2rpcent);
64 arg.key.name = name;
65 arg.stayopen = rpc_stayopen;
66 res = nss_search(&db_root, _nss_initf_rpc,
67 NSS_DBOP_RPC_BYNAME, &arg);
68 arg.status = res;
69 return ((struct rpcent *)NSS_XbyY_FINI(&arg));
70 }
71
72 struct rpcent *
getrpcbynumber_r(const int number,struct rpcent * result,char * buffer,int buflen)73 getrpcbynumber_r(const int number, struct rpcent *result, char *buffer,
74 int buflen)
75 {
76 nss_XbyY_args_t arg;
77 nss_status_t res;
78
79 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2rpcent);
80 arg.key.number = number;
81 arg.stayopen = rpc_stayopen;
82 res = nss_search(&db_root, _nss_initf_rpc,
83 NSS_DBOP_RPC_BYNUMBER, &arg);
84 arg.status = res;
85 return ((struct rpcent *)NSS_XbyY_FINI(&arg));
86 }
87
88 void
setrpcent(const int stay)89 setrpcent(const int stay)
90 {
91 rpc_stayopen |= stay;
92 nss_setent(&db_root, _nss_initf_rpc, &context);
93 }
94
95 void
endrpcent(void)96 endrpcent(void)
97 {
98 rpc_stayopen = 0;
99 nss_endent(&db_root, _nss_initf_rpc, &context);
100 nss_delete(&db_root);
101 }
102
103 struct rpcent *
getrpcent_r(struct rpcent * result,char * buffer,int buflen)104 getrpcent_r(struct rpcent *result, char *buffer, int buflen)
105 {
106 nss_XbyY_args_t arg;
107 nss_status_t res;
108
109 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2rpcent);
110 /* No key, no stayopen */
111 res = nss_getent(&db_root, _nss_initf_rpc, &context, &arg);
112 arg.status = res;
113 return ((struct rpcent *)NSS_XbyY_FINI(&arg));
114 }
115
116 int
str2rpcent(const char * instr,int lenstr,void * ent,char * buffer,int buflen)117 str2rpcent(const char *instr, int lenstr, void *ent, char *buffer, int buflen)
118 {
119 struct rpcent *rpc = (struct rpcent *)ent;
120 const char *p, *numstart, *limit, *namestart;
121 ssize_t numlen, namelen = 0;
122 char numbuf[12];
123 char *numend;
124
125 if ((instr >= buffer && (buffer + buflen) > instr) ||
126 (buffer >= instr && (instr + lenstr) > buffer))
127 return (NSS_STR_PARSE_PARSE);
128
129 p = instr;
130 limit = p + lenstr;
131
132 while (p < limit && isspace(*p)) {
133 p++;
134 }
135 namestart = p;
136 while (p < limit && !isspace(*p)) {
137 p++; /* Skip over the canonical name */
138 }
139 namelen = p - namestart;
140
141 if (buflen <= namelen) /* not enough buffer */
142 return (NSS_STR_PARSE_ERANGE);
143 (void) memcpy(buffer, namestart, namelen);
144 buffer[namelen] = '\0';
145 rpc->r_name = buffer;
146
147 while (p < limit && isspace(*p)) {
148 p++;
149 }
150 if (p >= limit) /* Syntax error -- no RPC number */
151 return (NSS_STR_PARSE_PARSE);
152 numstart = p;
153 do {
154 p++; /* Find the end of the RPC number */
155 } while (p < limit && !isspace(*p));
156 numlen = p - numstart;
157 if (numlen >= sizeof (numbuf)) {
158 /* Syntax error -- supposed number is too long */
159 return (NSS_STR_PARSE_PARSE);
160 }
161 (void) memcpy(numbuf, numstart, numlen);
162 numbuf[numlen] = '\0';
163 rpc->r_number = (int)strtol(numbuf, &numend, 10);
164 if (*numend != '\0')
165 return (NSS_STR_PARSE_PARSE);
166
167 while (p < limit && isspace(*p)) {
168 p++;
169 }
170 /*
171 * Although nss_files_XY_all calls us with # stripped,
172 * we should be able to deal with it here in order to
173 * be more useful.
174 */
175 if (p >= limit || *p == '#') { /* no aliases, no problem */
176 char **ptr;
177
178 ptr = (char **)ROUND_UP(buffer + namelen + 1,
179 sizeof (char *));
180 if ((char *)ptr >= buffer + buflen) {
181 rpc->r_aliases = 0; /* hope they don't try to peek in */
182 return (NSS_STR_PARSE_ERANGE);
183 }
184 *ptr = 0;
185 rpc->r_aliases = ptr;
186 return (NSS_STR_PARSE_SUCCESS);
187 }
188 rpc->r_aliases = _nss_netdb_aliases(p, (int)(lenstr - (p - instr)),
189 buffer + namelen + 1, (int)(buflen - namelen - 1));
190 return (NSS_STR_PARSE_SUCCESS);
191 }
192