1 /*
2  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3  * Copyright (c) 1998-1999 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 #include <port_before.h>
19 #if !defined(_REENTRANT) || !defined(DO_PTHREADS)
20 	static int getprotoent_r_not_required = 0;
21 #else
22 #include <errno.h>
23 #include <string.h>
24 #include <stdio.h>
25 #include <sys/types.h>
26 #include <netinet/in.h>
27 #include <netdb.h>
28 #include <port_after.h>
29 
30 #ifdef PROTO_R_RETURN
31 
32 static PROTO_R_RETURN
33 copy_protoent(struct protoent *, struct protoent *, PROTO_R_COPY_ARGS);
34 
35 PROTO_R_RETURN
36 getprotobyname_r(const char *name, struct protoent *pptr, PROTO_R_ARGS) {
37 	struct protoent *pe = getprotobyname(name);
38 #ifdef PROTO_R_SETANSWER
39 	int n = 0;
40 
41 	if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
42 		*answerp = NULL;
43 	else
44 		*answerp = pptr;
45 
46 	return (n);
47 #else
48 	if (pe == NULL)
49 		return (PROTO_R_BAD);
50 
51 	return (copy_protoent(pe, pptr, PROTO_R_COPY));
52 #endif
53 }
54 
55 PROTO_R_RETURN
56 getprotobynumber_r(int proto, struct protoent *pptr, PROTO_R_ARGS) {
57 	struct protoent *pe = getprotobynumber(proto);
58 #ifdef PROTO_R_SETANSWER
59 	int n = 0;
60 
61 	if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
62 		*answerp = NULL;
63 	else
64 		*answerp = pptr;
65 
66 	return (n);
67 #else
68 	if (pe == NULL)
69 		return (PROTO_R_BAD);
70 
71 	return (copy_protoent(pe, pptr, PROTO_R_COPY));
72 #endif
73 }
74 
75 /*%
76  *	These assume a single context is in operation per thread.
77  *	If this is not the case we will need to call irs directly
78  *	rather than through the base functions.
79  */
80 
81 PROTO_R_RETURN
82 getprotoent_r(struct protoent *pptr, PROTO_R_ARGS) {
83 	struct protoent *pe = getprotoent();
84 #ifdef PROTO_R_SETANSWER
85 	int n = 0;
86 
87 	if (pe == NULL || (n = copy_protoent(pe, pptr, PROTO_R_COPY)) != 0)
88 		*answerp = NULL;
89 	else
90 		*answerp = pptr;
91 
92 	return (n);
93 #else
94 	if (pe == NULL)
95 		return (PROTO_R_BAD);
96 
97 	return (copy_protoent(pe, pptr, PROTO_R_COPY));
98 #endif
99 }
100 
101 PROTO_R_SET_RETURN
102 #ifdef PROTO_R_ENT_ARGS
103 setprotoent_r(int stay_open, PROTO_R_ENT_ARGS)
104 #else
105 setprotoent_r(int stay_open)
106 #endif
107 {
108 #ifdef PROTO_R_ENT_UNUSED
109         PROTO_R_ENT_UNUSED;
110 #endif
111 	setprotoent(stay_open);
112 #ifdef PROTO_R_SET_RESULT
113 	return (PROTO_R_SET_RESULT);
114 #endif
115 }
116 
117 PROTO_R_END_RETURN
118 #ifdef PROTO_R_ENT_ARGS
119 endprotoent_r(PROTO_R_ENT_ARGS)
120 #else
121 endprotoent_r()
122 #endif
123 {
124 #ifdef PROTO_R_ENT_UNUSED
125         PROTO_R_ENT_UNUSED;
126 #endif
127 	endprotoent();
128 	PROTO_R_END_RESULT(PROTO_R_OK);
129 }
130 
131 /* Private */
132 
133 #ifndef PROTOENT_DATA
134 static PROTO_R_RETURN
135 copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
136 	char *cp;
137 	int i, n;
138 	int numptr, len;
139 
140 	/* Find out the amount of space required to store the answer. */
141 	numptr = 1; /*%< NULL ptr */
142 	len = (char *)ALIGN(buf) - buf;
143 	for (i = 0; pe->p_aliases[i]; i++, numptr++) {
144 		len += strlen(pe->p_aliases[i]) + 1;
145 	}
146 	len += strlen(pe->p_name) + 1;
147 	len += numptr * sizeof(char*);
148 
149 	if (len > (int)buflen) {
150 		errno = ERANGE;
151 		return (PROTO_R_BAD);
152 	}
153 
154 	/* copy protocol value*/
155 	pptr->p_proto = pe->p_proto;
156 
157 	cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
158 
159 	/* copy official name */
160 	n = strlen(pe->p_name) + 1;
161 	strcpy(cp, pe->p_name);
162 	pptr->p_name = cp;
163 	cp += n;
164 
165 	/* copy aliases */
166 	pptr->p_aliases = (char **)ALIGN(buf);
167 	for (i = 0 ; pe->p_aliases[i]; i++) {
168 		n = strlen(pe->p_aliases[i]) + 1;
169 		strcpy(cp, pe->p_aliases[i]);
170 		pptr->p_aliases[i] = cp;
171 		cp += n;
172 	}
173 	pptr->p_aliases[i] = NULL;
174 
175 	return (PROTO_R_OK);
176 }
177 #else /* !PROTOENT_DATA */
178 static int
179 copy_protoent(struct protoent *pe, struct protoent *pptr, PROTO_R_COPY_ARGS) {
180 	char *cp, *eob;
181 	int i, n;
182 
183 	/* copy protocol value */
184 	pptr->p_proto = pe->p_proto;
185 
186 	/* copy official name */
187 	cp = pdptr->line;
188 	eob = pdptr->line + sizeof(pdptr->line);
189 	if ((n = strlen(pe->p_name) + 1) < (eob - cp)) {
190 		strcpy(cp, pe->p_name);
191 		pptr->p_name = cp;
192 		cp += n;
193 	} else {
194 		return (-1);
195 	}
196 
197 	/* copy aliases */
198 	i = 0;
199 	pptr->p_aliases = pdptr->proto_aliases;
200 	while (pe->p_aliases[i] && i < (_MAXALIASES-1)) {
201 		if ((n = strlen(pe->p_aliases[i]) + 1) < (eob - cp)) {
202 			strcpy(cp, pe->p_aliases[i]);
203 			pptr->p_aliases[i] = cp;
204 			cp += n;
205 		} else {
206 			break;
207 		}
208 		i++;
209 	}
210 	pptr->p_aliases[i] = NULL;
211 
212 	return (PROTO_R_OK);
213 }
214 #endif /* PROTOENT_DATA */
215 #else /* PROTO_R_RETURN */
216 	static int getprotoent_r_unknown_system = 0;
217 #endif /* PROTO_R_RETURN */
218 #endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */
219 /*! \file */
220