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Refactor mm_msg_encode

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This commit is contained in:
Guido Casati
2025-01-30 15:21:39 +01:00
parent 3e27e53f52
commit 97521d21e5
1 changed files with 19 additions and 31 deletions
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openair3/NAS/NR_UE/5GS/fgs_nas_lib.c
+19 -31
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@@ -50,67 +50,55 @@ int _nas_mm_msg_encode_header(const fgmm_msg_header_t *header, uint8_t *buffer,
int mm_msg_encode(const fgmm_nas_message_plain_t *p, uint8_t *buffer, uint32_t len)
{
LOG_FUNC_IN;
int header_result;
int encode_result;
uint8_t msg_type = p->header.message_type;
int enc_msg = 0;
/* First encode the 5GMM message header */
header_result = _nas_mm_msg_encode_header(&p->header, buffer, len);
int enc_header = _nas_mm_msg_encode_header(&p->header, buffer, len);
if (header_result < 0) {
LOG_TRACE(ERROR,
"Failed to encode 5GMM message header"
"(%d)",
header_result);
LOG_FUNC_RETURN(header_result);
if (enc_header < 0) {
PRINT_NAS_ERROR("Failed to encode 5GMM message header\n");
return enc_header;
}
buffer += header_result;
len -= header_result;
buffer += enc_header;
len -= enc_header;
switch (msg_type) {
case FGS_REGISTRATION_REQUEST:
encode_result = encode_registration_request(&p->mm_msg.registration_request, buffer, len);
enc_msg = encode_registration_request(&p->mm_msg.registration_request, buffer, len);
break;
case FGS_IDENTITY_RESPONSE:
encode_result = encode_fgmm_identity_response(buffer, &p->mm_msg.fgs_identity_response, len);
enc_msg = encode_fgmm_identity_response(buffer, &p->mm_msg.fgs_identity_response, len);
break;
case FGS_AUTHENTICATION_RESPONSE:
encode_result = encode_fgs_authentication_response(&p->mm_msg.fgs_auth_response, buffer, len);
enc_msg = encode_fgs_authentication_response(&p->mm_msg.fgs_auth_response, buffer, len);
break;
case FGS_SECURITY_MODE_COMPLETE:
encode_result = encode_fgs_security_mode_complete(&p->mm_msg.fgs_security_mode_complete, buffer, len);
enc_msg = encode_fgs_security_mode_complete(&p->mm_msg.fgs_security_mode_complete, buffer, len);
break;
case FGS_UPLINK_NAS_TRANSPORT:
encode_result = encode_fgs_uplink_nas_transport(&p->mm_msg.uplink_nas_transport, buffer, len);
enc_msg = encode_fgs_uplink_nas_transport(&p->mm_msg.uplink_nas_transport, buffer, len);
break;
case FGS_DEREGISTRATION_REQUEST_UE_ORIGINATING:
encode_result =
enc_msg =
encode_fgs_deregistration_request_ue_originating(&p->mm_msg.fgs_deregistration_request_ue_originating, buffer, len);
break;
case FGS_SERVICE_REQUEST:
encode_result = encode_fgs_service_request(buffer, &p->mm_msg.service_request, len);
enc_msg = encode_fgs_service_request(buffer, &p->mm_msg.service_request, len);
break;
default:
LOG_TRACE(ERROR, " Unexpected message type: 0x%x", p->header.message_type);
encode_result = TLV_ENCODE_WRONG_MESSAGE_TYPE;
enc_msg = TLV_ENCODE_WRONG_MESSAGE_TYPE;
break;
/* TODO: Handle not standard layer 3 messages: SERVICE_REQUEST */
}
if (encode_result < 0) {
LOG_TRACE(ERROR,
" Failed to encode L3 EMM message 0x%x "
"(%d)",
p->header.message_type,
encode_result);
if (enc_msg < 0) {
PRINT_NAS_ERROR("Failed to encode 5GMM message\n");
return enc_msg;
}
if (encode_result < 0)
LOG_FUNC_RETURN(encode_result);
LOG_FUNC_RETURN(header_result + encode_result);
return enc_header + enc_msg;
}
int nas_protected_security_header_encode(uint8_t *buffer, const fgs_nas_message_security_header_t *header, int length)