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Code Issues 5 Pull Requests Releases Activity

asn1: Handle named subtypes that are tagged

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This:

    Foo ::= SEQUENCE { bar Bar }
    Bar ::= [APPLICATION 0] INTEGER

was crashing the compiler.
This commit is contained in:
Nicolas Williams
2020-12-31 14:45:43 -06:00
parent adaf7c5fb9
commit 426adfa395
1 changed files with 11 additions and 6 deletions
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17
lib/asn1/gen_decode.c
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@@ -374,20 +374,25 @@ decode_type(const char *name, const Type *t, int optional, struct value *defval,
fprintf(codefile,
"Der_class class;\n"
"Der_type type;\n"
"int tag;\n"
"unsigned int tag;\n"
"e = der_get_tag (p, len, &class, &type, &tag, NULL);\n"
"if(e) %s;\n", forwstr);
fprintf(codefile, "switch (MAKE_TAG(class, type, tag)) {\n");
memno = 0;
HEIM_TAILQ_FOREACH(m, t->members, members) {
Type *mst = m->type; /* Member sub-type */
char *s;
assert(m->type->type == TTag);
while (mst->type == TType) {
assert(mst->subtype || (mst->symbol && mst->symbol->type));
mst = mst->subtype ? mst->subtype : mst->symbol->type;
}
assert(mst->type == TTag);
fprintf(codefile, "case MAKE_TAG(%s, %s, %s):\n",
classname(m->type->tag.tagclass),
is_primitive_type(m->type->subtype) ? "PRIM" : "CONS",
valuename(m->type->tag.tagclass, m->type->tag.tagvalue));
classname(mst->tag.tagclass),
is_primitive_type(mst->subtype) ? "PRIM" : "CONS",
valuename(mst->tag.tagclass, mst->tag.tagvalue));
if (asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name) < 0 || s == NULL)
errx(1, "malloc");
@@ -396,7 +401,7 @@ decode_type(const char *name, const Type *t, int optional, struct value *defval,
"%s = calloc(1, sizeof(*%s));\n"
"if (%s == NULL) { e = ENOMEM; %s; }\n",
s, s, s, forwstr);
decode_type (s, m->type, 0, NULL, forwstr, m->gen_name, NULL, depth + 1);
decode_type (s, mst, 0, NULL, forwstr, m->gen_name, NULL, depth + 1);
free (s);
fprintf(codefile, "members |= (1ULL << %u);\n", memno);