1 /* $NetBSD: getprotoent_r.c,v 1.1.1.2 2012/09/09 16:07:58 christos Exp $ */
2
3 /*
4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (c) 1998-1999 by Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #if defined(LIBC_SCCS) && !defined(lint)
21 static const char rcsid[] = "Id: getprotoent_r.c,v 1.6 2006/08/01 01:14:16 marka Exp ";
22 #endif /* LIBC_SCCS and not lint */
23
24 #include <port_before.h>
25 #if !defined(_REENTRANT) || !defined(DO_PTHREADS)
26 static int getprotoent_r_not_required = 0;
27 #else
28 #include <errno.h>
29 #include <string.h>
30 #include <stdio.h>
31 #include <sys/types.h>
32 #include <netinet/in.h>
33 #include <netdb.h>
34 #include <port_after.h>
35
36 #ifdef PROTO_R_RETURN
37
38 static PROTO_R_RETURN
39 copy_protoent(struct protoent *, struct protoent *, PROTO_R_COPY_ARGS);
40
41 PROTO_R_RETURN
getprotobyname_r(const char * name,struct protoent * pptr,PROTO_R_ARGS)42 getprotobyname_r(const char *name, struct protoent *pptr, PROTO_R_ARGS) {
43 struct protoent *pe = getprotobyname(name);
44 #ifdef PROTO_R_SETANSWER
45 int n = 0;
46
47 if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
48 *answerp = NULL;
49 else
50 *answerp = pptr;
51
52 return (n);
53 #else
54 if (pe == NULL)
55 return (PROTO_R_BAD);
56
57 return (copy_protoent(pe, pptr, PROTO_R_COPY));
58 #endif
59 }
60
61 PROTO_R_RETURN
getprotobynumber_r(int proto,struct protoent * pptr,PROTO_R_ARGS)62 getprotobynumber_r(int proto, struct protoent *pptr, PROTO_R_ARGS) {
63 struct protoent *pe = getprotobynumber(proto);
64 #ifdef PROTO_R_SETANSWER
65 int n = 0;
66
67 if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
68 *answerp = NULL;
69 else
70 *answerp = pptr;
71
72 return (n);
73 #else
74 if (pe == NULL)
75 return (PROTO_R_BAD);
76
77 return (copy_protoent(pe, pptr, PROTO_R_COPY));
78 #endif
79 }
80
81 /*%
82 * These assume a single context is in operation per thread.
83 * If this is not the case we will need to call irs directly
84 * rather than through the base functions.
85 */
86
87 PROTO_R_RETURN
getprotoent_r(struct protoent * pptr,PROTO_R_ARGS)88 getprotoent_r(struct protoent *pptr, PROTO_R_ARGS) {
89 struct protoent *pe = getprotoent();
90 #ifdef PROTO_R_SETANSWER
91 int n = 0;
92
93 if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
94 *answerp = NULL;
95 else
96 *answerp = pptr;
97
98 return (n);
99 #else
100 if (pe == NULL)
101 return (PROTO_R_BAD);
102
103 return (copy_protoent(pe, pptr, PROTO_R_COPY));
104 #endif
105 }
106
107 PROTO_R_SET_RETURN
108 #ifdef PROTO_R_ENT_ARGS
setprotoent_r(int stay_open,PROTO_R_ENT_ARGS)109 setprotoent_r(int stay_open, PROTO_R_ENT_ARGS)
110 #else
111 setprotoent_r(int stay_open)
112 #endif
113 {
114 #ifdef PROTO_R_ENT_UNUSED
115 PROTO_R_ENT_UNUSED;
116 #endif
117 setprotoent(stay_open);
118 #ifdef PROTO_R_SET_RESULT
119 return (PROTO_R_SET_RESULT);
120 #endif
121 }
122
123 PROTO_R_END_RETURN
124 #ifdef PROTO_R_ENT_ARGS
endprotoent_r(PROTO_R_ENT_ARGS)125 endprotoent_r(PROTO_R_ENT_ARGS)
126 #else
127 endprotoent_r()
128 #endif
129 {
130 #ifdef PROTO_R_ENT_UNUSED
131 PROTO_R_ENT_UNUSED;
132 #endif
133 endprotoent();
134 PROTO_R_END_RESULT(PROTO_R_OK);
135 }
136
137 /* Private */
138
139 #ifndef PROTOENT_DATA
140 static PROTO_R_RETURN
copy_protoent(struct protoent * pe,struct protoent * pptr,PROTO_R_COPY_ARGS)141 copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
142 char *cp;
143 int i, n;
144 int numptr, len;
145
146 /* Find out the amount of space required to store the answer. */
147 numptr = 1; /*%< NULL ptr */
148 len = (char *)ALIGN(buf) - buf;
149 for (i = 0; pe->p_aliases[i]; i++, numptr++) {
150 len += strlen(pe->p_aliases[i]) + 1;
151 }
152 len += strlen(pe->p_name) + 1;
153 len += numptr * sizeof(char*);
154
155 if (len > (int)buflen) {
156 errno = ERANGE;
157 return (PROTO_R_BAD);
158 }
159
160 /* copy protocol value*/
161 pptr->p_proto = pe->p_proto;
162
163 cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
164
165 /* copy official name */
166 n = strlen(pe->p_name) + 1;
167 strcpy(cp, pe->p_name);
168 pptr->p_name = cp;
169 cp += n;
170
171 /* copy aliases */
172 pptr->p_aliases = (char **)ALIGN(buf);
173 for (i = 0 ; pe->p_aliases[i]; i++) {
174 n = strlen(pe->p_aliases[i]) + 1;
175 strcpy(cp, pe->p_aliases[i]);
176 pptr->p_aliases[i] = cp;
177 cp += n;
178 }
179 pptr->p_aliases[i] = NULL;
180
181 return (PROTO_R_OK);
182 }
183 #else /* !PROTOENT_DATA */
184 static int
copy_protoent(struct protoent * pe,struct protoent * pptr,PROTO_R_COPY_ARGS)185 copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
186 char *cp, *eob;
187 int i, n;
188
189 /* copy protocol value */
190 pptr->p_proto = pe->p_proto;
191
192 /* copy official name */
193 cp = pdptr->line;
194 eob = pdptr->line + sizeof(pdptr->line);
195 if ((n = strlen(pe->p_name) + 1) < (eob - cp)) {
196 strcpy(cp, pe->p_name);
197 pptr->p_name = cp;
198 cp += n;
199 } else {
200 return (-1);
201 }
202
203 /* copy aliases */
204 i = 0;
205 pptr->p_aliases = pdptr->proto_aliases;
206 while (pe->p_aliases[i] && i < (_MAXALIASES-1)) {
207 if ((n = strlen(pe->p_aliases[i]) + 1) < (eob - cp)) {
208 strcpy(cp, pe->p_aliases[i]);
209 pptr->p_aliases[i] = cp;
210 cp += n;
211 } else {
212 break;
213 }
214 i++;
215 }
216 pptr->p_aliases[i] = NULL;
217
218 return (PROTO_R_OK);
219 }
220 #endif /* PROTOENT_DATA */
221 #else /* PROTO_R_RETURN */
222 static int getprotoent_r_unknown_system = 0;
223 #endif /* PROTO_R_RETURN */
224 #endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */
225 /*! \file */
226