ranap ASN.1: Define IMSI as OCTET STRING to work around asn1c bug
When IMSI is a TBCD-STRING type, and TBCD-STRING is defined as OCTET
STRING, we end up encoding the IMSI the wrong way. I don't knwo why
that is, but changing it fixed the problem, as described below:
before this commit:
00 17 PeranentNAS-UE-ID
40 criticality ignore
0a (length)
00 presence = IMSI
08 BUG: why the additional length field?
46 23 91 34 70 77 80 f3 IMSI (643219430777083)
after this commit:
00 17 PeranentNAS-UE-ID
40 criticality ignore
09 (length)
50 presence = IMSI
46 23 91 34 70 77 80 f3 IMSI (643219430777083)
diff --git a/asn1/ranap/RANAP-IEs.asn b/asn1/ranap/RANAP-IEs.asn
index 9593ee8..78fcfbe 100644
--- a/asn1/ranap/RANAP-IEs.asn
+++ b/asn1/ranap/RANAP-IEs.asn
@@ -842,7 +842,7 @@
iE-Extensions IE-Extensions OPTIONAL
}
-IMSI ::= TBCD-STRING (SIZE (3..8))
+IMSI ::= OCTET STRING (SIZE (3..8))
-- Reference: 23.003
IncludeVelocity ::= ENUMERATED {
diff --git a/src/ranap/RANAP_IMSI.c b/src/ranap/RANAP_IMSI.c
index 89a85cd..4b35ef7 100644
--- a/src/ranap/RANAP_IMSI.c
+++ b/src/ranap/RANAP_IMSI.c
@@ -9,6 +9,8 @@
int
RANAP_IMSI_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
asn_app_constraint_failed_f *ctfailcb, void *app_key) {
+ const OCTET_STRING_t *st = (const OCTET_STRING_t *)sptr;
+ size_t size;
if(!sptr) {
_ASN_CTFAIL(app_key, td, sptr,
@@ -17,44 +19,41 @@
return -1;
}
+ size = st->size;
- if(1 /* No applicable constraints whatsoever */) {
- /* Nothing is here. See below */
+ if((size >= 3l && size <= 8l)) {
+ /* Constraint check succeeded */
+ return 0;
+ } else {
+ _ASN_CTFAIL(app_key, td, sptr,
+ "%s: constraint failed (%s:%d)",
+ td->name, __FILE__, __LINE__);
+ return -1;
}
-
- /* Replace with underlying type checker */
- td->check_constraints = asn_DEF_RANAP_TBCD_STRING.check_constraints;
- return td->check_constraints(td, sptr, ctfailcb, app_key);
}
/*
- * This type is implemented using RANAP_TBCD_STRING,
+ * This type is implemented using OCTET_STRING,
* so here we adjust the DEF accordingly.
*/
static void
RANAP_IMSI_1_inherit_TYPE_descriptor(asn_TYPE_descriptor_t *td) {
- td->free_struct = asn_DEF_RANAP_TBCD_STRING.free_struct;
- td->print_struct = asn_DEF_RANAP_TBCD_STRING.print_struct;
- td->check_constraints = asn_DEF_RANAP_TBCD_STRING.check_constraints;
- td->ber_decoder = asn_DEF_RANAP_TBCD_STRING.ber_decoder;
- td->der_encoder = asn_DEF_RANAP_TBCD_STRING.der_encoder;
- td->xer_decoder = asn_DEF_RANAP_TBCD_STRING.xer_decoder;
- td->xer_encoder = asn_DEF_RANAP_TBCD_STRING.xer_encoder;
- td->uper_decoder = asn_DEF_RANAP_TBCD_STRING.uper_decoder;
- td->uper_encoder = asn_DEF_RANAP_TBCD_STRING.uper_encoder;
- td->aper_decoder = asn_DEF_RANAP_TBCD_STRING.aper_decoder;
- td->aper_encoder = asn_DEF_RANAP_TBCD_STRING.aper_encoder;
- /* The next four lines are here because of -fknown-extern-type */
- td->tags = asn_DEF_RANAP_TBCD_STRING.tags;
- td->tags_count = asn_DEF_RANAP_TBCD_STRING.tags_count;
- td->all_tags = asn_DEF_RANAP_TBCD_STRING.all_tags;
- td->all_tags_count = asn_DEF_RANAP_TBCD_STRING.all_tags_count;
- /* End of these lines */
+ td->free_struct = asn_DEF_OCTET_STRING.free_struct;
+ td->print_struct = asn_DEF_OCTET_STRING.print_struct;
+ td->check_constraints = asn_DEF_OCTET_STRING.check_constraints;
+ td->ber_decoder = asn_DEF_OCTET_STRING.ber_decoder;
+ td->der_encoder = asn_DEF_OCTET_STRING.der_encoder;
+ td->xer_decoder = asn_DEF_OCTET_STRING.xer_decoder;
+ td->xer_encoder = asn_DEF_OCTET_STRING.xer_encoder;
+ td->uper_decoder = asn_DEF_OCTET_STRING.uper_decoder;
+ td->uper_encoder = asn_DEF_OCTET_STRING.uper_encoder;
+ td->aper_decoder = asn_DEF_OCTET_STRING.aper_decoder;
+ td->aper_encoder = asn_DEF_OCTET_STRING.aper_encoder;
if(!td->per_constraints)
- td->per_constraints = asn_DEF_RANAP_TBCD_STRING.per_constraints;
- td->elements = asn_DEF_RANAP_TBCD_STRING.elements;
- td->elements_count = asn_DEF_RANAP_TBCD_STRING.elements_count;
- td->specifics = asn_DEF_RANAP_TBCD_STRING.specifics;
+ td->per_constraints = asn_DEF_OCTET_STRING.per_constraints;
+ td->elements = asn_DEF_OCTET_STRING.elements;
+ td->elements_count = asn_DEF_OCTET_STRING.elements_count;
+ td->specifics = asn_DEF_OCTET_STRING.specifics;
}
void
@@ -133,9 +132,12 @@
static asn_per_constraints_t asn_PER_type_RANAP_IMSI_constr_1 GCC_NOTUSED = {
{ APC_UNCONSTRAINED, -1, -1, 0, 0 },
- { APC_UNCONSTRAINED, -1, -1, 0, 0 },
+ { APC_CONSTRAINED, 3, 3, 3l, 8l } /* (SIZE(3..8)) */,
0, 0 /* No PER value map */
};
+static const ber_tlv_tag_t asn_DEF_RANAP_IMSI_tags_1[] = {
+ (ASN_TAG_CLASS_UNIVERSAL | (4 << 2))
+};
asn_TYPE_descriptor_t asn_DEF_RANAP_IMSI = {
"RANAP_IMSI",
"RANAP_IMSI",
@@ -150,11 +152,13 @@
RANAP_IMSI_encode_uper,
RANAP_IMSI_decode_aper,
RANAP_IMSI_encode_aper,
- CHOICE_outmost_tag,
- 0, /* No effective tags (pointer) */
- 0, /* No effective tags (count) */
- 0, /* No tags (pointer) */
- 0, /* No tags (count) */
+ 0, /* Use generic outmost tag fetcher */
+ asn_DEF_RANAP_IMSI_tags_1,
+ sizeof(asn_DEF_RANAP_IMSI_tags_1)
+ /sizeof(asn_DEF_RANAP_IMSI_tags_1[0]), /* 1 */
+ asn_DEF_RANAP_IMSI_tags_1, /* Same as above */
+ sizeof(asn_DEF_RANAP_IMSI_tags_1)
+ /sizeof(asn_DEF_RANAP_IMSI_tags_1[0]), /* 1 */
&asn_PER_type_RANAP_IMSI_constr_1,
0, 0, /* No members */
0 /* No specifics */
diff --git a/src/ranap/RANAP_IMSI.h b/src/ranap/RANAP_IMSI.h
index 6cf720d..747c546 100644
--- a/src/ranap/RANAP_IMSI.h
+++ b/src/ranap/RANAP_IMSI.h
@@ -12,14 +12,14 @@
#include <asn_application.h>
/* Including external dependencies */
-#include "RANAP_TBCD-STRING.h"
+#include <OCTET_STRING.h>
#ifdef __cplusplus
extern "C" {
#endif
/* RANAP_IMSI */
-typedef RANAP_TBCD_STRING_t RANAP_IMSI_t;
+typedef OCTET_STRING_t RANAP_IMSI_t;
/* Implementation */
extern asn_TYPE_descriptor_t asn_DEF_RANAP_IMSI;