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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 #include <ctype.h>
29 #include <netdb.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <nss_dbdefs.h>
33
34 int str2protoent(const char *, int, void *,
35 char *, int);
36
37 static int proto_stayopen;
38 /*
39 * Unsynchronized, but it affects only
40 * efficiency, not correctness
41 */
42
43 static DEFINE_NSS_DB_ROOT(db_root);
44 static DEFINE_NSS_GETENT(context);
45
46 void
_nss_initf_proto(nss_db_params_t * p)47 _nss_initf_proto(nss_db_params_t *p)
48 {
49 p->name = NSS_DBNAM_PROTOCOLS;
50 p->default_config = NSS_DEFCONF_PROTOCOLS;
51 }
52
53 struct protoent *
getprotobyname_r(const char * name,struct protoent * result,char * buffer,int buflen)54 getprotobyname_r(const char *name, struct protoent *result,
55 char *buffer, int buflen)
56 {
57 nss_XbyY_args_t arg;
58 nss_status_t res;
59
60 if (name == (const char *)NULL) {
61 errno = ERANGE;
62 return (NULL);
63 }
64 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2protoent);
65 arg.key.name = name;
66 arg.stayopen = proto_stayopen;
67 res = nss_search(&db_root, _nss_initf_proto,
68 NSS_DBOP_PROTOCOLS_BYNAME, &arg);
69 arg.status = res;
70 (void) NSS_XbyY_FINI(&arg);
71 return ((struct protoent *)arg.returnval);
72 }
73
74 struct protoent *
getprotobynumber_r(int proto,struct protoent * result,char * buffer,int buflen)75 getprotobynumber_r(int proto, struct protoent *result, char *buffer, int buflen)
76 {
77 nss_XbyY_args_t arg;
78 nss_status_t res;
79
80 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2protoent);
81 arg.key.number = proto;
82 arg.stayopen = proto_stayopen;
83 res = nss_search(&db_root, _nss_initf_proto,
84 NSS_DBOP_PROTOCOLS_BYNUMBER, &arg);
85 arg.status = res;
86 (void) NSS_XbyY_FINI(&arg);
87 return ((struct protoent *)arg.returnval);
88 }
89
90 int
setprotoent(int stay)91 setprotoent(int stay)
92 {
93 proto_stayopen = stay;
94 nss_setent(&db_root, _nss_initf_proto, &context);
95 return (0);
96 }
97
98 int
endprotoent()99 endprotoent()
100 {
101 proto_stayopen = 0;
102 nss_endent(&db_root, _nss_initf_proto, &context);
103 nss_delete(&db_root);
104 return (0);
105 }
106
107 struct protoent *
getprotoent_r(struct protoent * result,char * buffer,int buflen)108 getprotoent_r(struct protoent *result, char *buffer, int buflen)
109 {
110 nss_XbyY_args_t arg;
111 nss_status_t res;
112
113 NSS_XbyY_INIT(&arg, result, buffer, buflen, str2protoent);
114 /* No stayopen flag; of course you stay open for iteration */
115 res = nss_getent(&db_root, _nss_initf_proto, &context, &arg);
116 arg.status = res;
117 (void) NSS_XbyY_FINI(&arg);
118 return ((struct protoent *)arg.returnval);
119 }
120
121 /*
122 * Return values: 0 = success, 1 = parse error, 2 = erange ...
123 * The structure pointer passed in is a structure in the caller's space
124 * wherein the field pointers would be set to areas in the buffer if
125 * need be. instring and buffer should be separate areas. Let's not
126 * fight over crumbs.
127 */
128 int
str2protoent(const char * instr,int lenstr,void * ent,char * buffer,int buflen)129 str2protoent(const char *instr, int lenstr,
130 void *ent /* it is really (struct protoent *) */,
131 char *buffer, int buflen)
132 {
133 struct protoent *proto = (struct protoent *)ent;
134 const char *p, *numstart, *namestart, *limit;
135 int numlen, namelen = 0;
136 char numbuf[16];
137 char *numend;
138
139 if ((instr >= buffer && (buffer + buflen) > instr) ||
140 (buffer >= instr && (instr + lenstr) > buffer)) {
141 return (NSS_STR_PARSE_PARSE);
142 }
143
144 p = instr;
145 limit = p + lenstr;
146
147 while (p < limit && isspace(*p)) {
148 p++;
149 }
150 namestart = p;
151 while (p < limit && !isspace(*p)) {
152 p++; /* Skip over the canonical name */
153 }
154 namelen = (int)(p - namestart);
155
156 if (buflen <= namelen) { /* not enough buffer */
157 return (NSS_STR_PARSE_ERANGE);
158 }
159 (void) memcpy(buffer, namestart, namelen);
160 buffer[namelen] = '\0';
161 proto->p_name = buffer;
162
163 while (p < limit && isspace(*p)) {
164 p++;
165 }
166 if (p >= limit) {
167 /* Syntax error -- no proto number */
168 return (NSS_STR_PARSE_PARSE);
169 }
170 numstart = p;
171 do {
172 p++; /* Find the end of the proto number */
173 } while (p < limit && !isspace(*p));
174 numlen = (int)(p - numstart);
175 if (numlen >= (int)sizeof (numbuf)) {
176 /* Syntax error -- supposed number is too long */
177 return (NSS_STR_PARSE_PARSE);
178 }
179 (void) memcpy(numbuf, numstart, (size_t)numlen);
180 numbuf[numlen] = '\0';
181 proto->p_proto = (int)strtol(numbuf, &numend, 10);
182 if (*numend != '\0') {
183 /* Syntax error -- protocol number isn't a number */
184 return (NSS_STR_PARSE_PARSE);
185 }
186
187 while (p < limit && isspace(*p)) {
188 p++;
189 }
190 /*
191 * Although nss_files_XY_all calls us with # stripped,
192 * we should be able to deal with it here in order to
193 * be more useful.
194 */
195 if (p >= limit || *p == '#') { /* no aliases, no problem */
196 char **ptr;
197
198 ptr = (char **)ROUND_UP(buffer + namelen + 1,
199 sizeof (char *));
200 if ((char *)ptr >= buffer + buflen) {
201 /* hope they don't try to peek in */
202 proto->p_aliases = 0;
203 return (NSS_STR_PARSE_ERANGE);
204 } else {
205 *ptr = 0;
206 proto->p_aliases = ptr;
207 return (NSS_STR_PARSE_SUCCESS);
208 }
209 }
210 proto->p_aliases = _nss_netdb_aliases(p, lenstr - (int)(p - instr),
211 buffer + namelen + 1, buflen - namelen - 1);
212 return (NSS_STR_PARSE_SUCCESS);
213 }
214