Line data Source code
1 : /*
2 : * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 : * (Royal Institute of Technology, Stockholm, Sweden).
4 : * All rights reserved.
5 : *
6 : * Redistribution and use in source and binary forms, with or without
7 : * modification, are permitted provided that the following conditions
8 : * are met:
9 : *
10 : * 1. Redistributions of source code must retain the above copyright
11 : * notice, this list of conditions and the following disclaimer.
12 : *
13 : * 2. Redistributions in binary form must reproduce the above copyright
14 : * notice, this list of conditions and the following disclaimer in the
15 : * documentation and/or other materials provided with the distribution.
16 : *
17 : * 3. Neither the name of the Institute nor the names of its contributors
18 : * may be used to endorse or promote products derived from this software
19 : * without specific prior written permission.
20 : *
21 : * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 : * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 : * SUCH DAMAGE.
32 : */
33 :
34 : #include "gen_locl.h"
35 :
36 : RCSID("$Id$");
37 :
38 : static void
39 476 : free_primitive (const char *typename, const char *name)
40 : {
41 476 : fprintf (codefile, "der_free_%s(%s);\n", typename, name);
42 476 : }
43 :
44 : static void
45 5516 : free_type (const char *name, const Type *t, int preserve)
46 : {
47 5516 : switch (t->type) {
48 1134 : case TType:
49 : #if 0
50 : free_type (name, t->symbol->type, preserve);
51 : #endif
52 1134 : fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name);
53 1134 : break;
54 308 : case TInteger:
55 308 : if (t->range == NULL && t->members == NULL) {
56 56 : free_primitive ("heim_integer", name);
57 56 : break;
58 : }
59 : /* fallthrough; */
60 : case TBoolean:
61 : case TEnumerated :
62 : case TNull:
63 : case TGeneralizedTime:
64 : case TUTCTime:
65 : /*
66 : * This doesn't do much, but it leaves zeros where garbage might
67 : * otherwise have been found. Gets us closer to having the equivalent
68 : * of a memset()-to-zero data structure after calling the free
69 : * functions.
70 : */
71 294 : fprintf(codefile, "*%s = 0;\n", name);
72 294 : break;
73 140 : case TBitString:
74 140 : if (HEIM_TAILQ_EMPTY(t->members))
75 98 : free_primitive("bit_string", name);
76 140 : break;
77 196 : case TOctetString:
78 196 : free_primitive ("octet_string", name);
79 196 : break;
80 532 : case TChoice:
81 : case TSet:
82 : case TSequence: {
83 532 : Member *m, *have_ellipsis = NULL;
84 :
85 532 : if (t->members == NULL)
86 0 : break;
87 :
88 532 : if ((t->type == TSequence || t->type == TChoice) && preserve)
89 0 : fprintf(codefile, "der_free_octet_string(&data->_save);\n");
90 :
91 532 : if(t->type == TChoice)
92 126 : fprintf(codefile, "switch((%s)->element) {\n", name);
93 :
94 2422 : HEIM_TAILQ_FOREACH(m, t->members, members) {
95 : char *s;
96 :
97 1890 : if (m->ellipsis){
98 84 : have_ellipsis = m;
99 84 : continue;
100 : }
101 :
102 1806 : if(t->type == TChoice)
103 462 : fprintf(codefile, "case %s:\n", m->label);
104 5418 : if (asprintf (&s, "%s(%s)->%s%s",
105 1806 : m->optional ? "" : "&", name,
106 3612 : t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL)
107 0 : errx(1, "malloc");
108 1806 : if(m->optional)
109 700 : fprintf(codefile, "if(%s) {\n", s);
110 1806 : free_type (s, m->type, FALSE);
111 1806 : if(m->optional)
112 700 : fprintf(codefile,
113 : "free(%s);\n"
114 : "%s = NULL;\n"
115 : "}\n",s, s);
116 1806 : free (s);
117 1806 : if(t->type == TChoice)
118 462 : fprintf(codefile, "break;\n");
119 : }
120 :
121 532 : if(t->type == TChoice) {
122 126 : if (have_ellipsis)
123 14 : fprintf(codefile,
124 : "case %s:\n"
125 : "der_free_octet_string(&(%s)->u.%s);\n"
126 : "break;",
127 : have_ellipsis->label,
128 : name, have_ellipsis->gen_name);
129 126 : fprintf(codefile, "}\n");
130 : }
131 532 : break;
132 : }
133 224 : case TSetOf:
134 : case TSequenceOf: {
135 : char *n;
136 :
137 224 : fprintf (codefile, "if ((%s)->val)\nwhile((%s)->len){\n", name, name);
138 224 : if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL)
139 0 : errx(1, "malloc");
140 224 : free_type(n, t->subtype, FALSE);
141 224 : fprintf(codefile,
142 : "(%s)->len--;\n"
143 : "} else (%s)->len = 0;\n",
144 : name, name);
145 224 : fprintf(codefile,
146 : "free((%s)->val);\n"
147 : "(%s)->val = NULL;\n", name, name);
148 224 : free(n);
149 224 : break;
150 : }
151 14 : case TGeneralString:
152 14 : free_primitive ("general_string", name);
153 14 : break;
154 0 : case TTeletexString:
155 0 : free_primitive ("general_string", name);
156 0 : break;
157 56 : case TUTF8String:
158 56 : free_primitive ("utf8string", name);
159 56 : break;
160 0 : case TPrintableString:
161 0 : free_primitive ("printable_string", name);
162 0 : break;
163 0 : case TIA5String:
164 0 : free_primitive ("ia5_string", name);
165 0 : break;
166 0 : case TBMPString:
167 0 : free_primitive ("bmp_string", name);
168 0 : break;
169 0 : case TUniversalString:
170 0 : free_primitive ("universal_string", name);
171 0 : break;
172 0 : case TVisibleString:
173 0 : free_primitive ("visible_string", name);
174 0 : break;
175 2814 : case TTag:
176 2814 : free_type (name, t->subtype, preserve);
177 2814 : break;
178 56 : case TOID :
179 56 : free_primitive ("oid", name);
180 56 : break;
181 0 : default :
182 0 : abort ();
183 : }
184 5516 : }
185 :
186 : void
187 672 : generate_type_free (const Symbol *s)
188 : {
189 : struct decoration deco;
190 672 : ssize_t more_deco = -1;
191 672 : int preserve = preserve_type(s->name) ? TRUE : FALSE;
192 :
193 672 : fprintf (codefile, "void ASN1CALL\n"
194 : "free_%s(%s *data)\n"
195 : "{\n",
196 : s->gen_name, s->gen_name);
197 :
198 672 : free_type ("data", s->type, preserve);
199 1358 : while (decorate_type(s->gen_name, &deco, &more_deco)) {
200 14 : if (deco.ext && deco.free_function_name == NULL) {
201 : /* Decorated with field of external type but no free function */
202 28 : if (deco.ptr)
203 0 : fprintf(codefile, "(data)->%s = 0;\n", deco.field_name);
204 : else
205 14 : fprintf(codefile,
206 : "memset(&(data)->%s, 0, sizeof((data)->%s));\n",
207 : deco.field_name, deco.field_name);
208 0 : } else if (deco.ext) {
209 : /* Decorated with field of external type w/ free function */
210 0 : if (deco.ptr) {
211 0 : fprintf(codefile, "if ((data)->%s) {\n", deco.field_name);
212 0 : fprintf(codefile, "%s((data)->%s);\n",
213 : deco.free_function_name, deco.field_name);
214 0 : fprintf(codefile, "(data)->%s = 0;\n", deco.field_name);
215 0 : fprintf(codefile, "}\n");
216 : } else {
217 0 : fprintf(codefile, "%s(&(data)->%s);\n",
218 : deco.free_function_name, deco.field_name);
219 0 : fprintf(codefile,
220 : "memset(&(data)->%s, 0, sizeof((data)->%s));\n",
221 : deco.field_name, deco.field_name);
222 : }
223 0 : } else if (deco.opt) {
224 : /* Decorated with optional field of ASN.1 type */
225 0 : fprintf(codefile, "if ((data)->%s) {\n", deco.field_name);
226 0 : fprintf(codefile, "free_%s((data)->%s);\n",
227 : deco.field_type, deco.field_name);
228 0 : fprintf(codefile, "free((data)->%s);\n", deco.field_name);
229 0 : fprintf(codefile, "(data)->%s = NULL;\n", deco.field_name);
230 0 : fprintf(codefile, "}\n");
231 : } else {
232 : /* Decorated with required field of ASN.1 type */
233 0 : fprintf(codefile, "free_%s(&(data)->%s);\n",
234 : deco.field_type, deco.field_name);
235 : }
236 14 : free(deco.field_type);
237 : }
238 672 : fprintf (codefile, "}\n\n");
239 672 : }
240 :
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