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Cleaning up the code

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master
Pedro Alvarez 7 years ago
parent 8a81149ca3
commit 961e0fc68d
3 changed files with 204 additions and 126 deletions
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11
srsepc/hdr/mme/s1ap_nas_transport.h
Unescape Escape View File

@ -27,7 +27,7 @@
#define S1AP_NAS_TRANSPORT_H
#include "srslte/asn1/liblte_s1ap.h"
#include "srslte/common/common.h"
#include "srslte/common/buffer_pool.h"
#include "mme/s1ap_common.h"
namespace srsepc{
@ -39,12 +39,17 @@ public:
virtual ~s1ap_nas_transport();
void set_log(srslte::log *s1ap_logger);
bool unpack_initial_ue_message(LIBLTE_S1AP_MESSAGE_S1SETUPREQUEST_STRUCT *msg, uint64_t *imsi);
bool unpack_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req, LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req);
bool pack_authentication_request(uint8_t *autn,uint8_t *rand);
void log_unhandled_attach_request_ies(const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req);
void log_unhandled_pdn_con_request_ies(const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req);
void log_unhandled_initial_ue_message_ies(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue);
private:
srslte::log *m_s1ap_log;
srslte::byte_buffer_pool *m_pool;
};
} //namespace srsepc

140
srsepc/src/mme/s1ap.cc
Unescape Escape View File

@ -236,130 +236,43 @@ s1ap::handle_s1_setup_request(LIBLTE_S1AP_MESSAGE_S1SETUPREQUEST_STRUCT *msg, st
}
bool
s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *msg, struct sctp_sndrcvinfo *enb_sri)
s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, struct sctp_sndrcvinfo *enb_sri)
{
m_s1ap_log->console("Received Initial UE Message\n");
m_s1ap_log->info("Received Initial UE Message\n");
LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT attach_req;
LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT pdn_con_req;
uint64_t imsi;
uint8_t amf[2]; // 3GPP 33.102 v10.0.0 Annex H
uint8_t op[16];
uint8_t k[16];
uint64_t imsi;
LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT attach_req;
LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT pdn_con_req;
/*Get info from initial UE message*/
uint32_t enb_ue_s1ap_id = msg->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
/*Get NAS Attach Request Message*/
uint8_t pd, msg_type;
srslte::byte_buffer_t *nas_msg = m_pool->allocate();
memcpy(nas_msg->msg, &msg->NAS_PDU.buffer, msg->NAS_PDU.n_octets);
nas_msg->N_bytes = msg->NAS_PDU.n_octets;
liblte_mme_parse_msg_header((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, &pd, &msg_type);
if(msg_type!=LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST){
m_s1ap_log->error("Unhandled NAS message within the Initial UE message\n");
return false;
}
uint32_t enb_ue_s1ap_id = init_ue->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID;
m_s1ap_log->console("Received Initial UE Message. eNB-UE S1AP Id: %d\n",enb_ue_s1ap_id);
m_s1ap_log->info("Received Initial UE Message. eNB-UE S1AP Id: %d\n",enb_ue_s1ap_id);
LIBLTE_ERROR_ENUM err = liblte_mme_unpack_attach_request_msg((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, &attach_req);
if(err != LIBLTE_SUCCESS){
m_s1ap_log->error("Error unpacking NAS attach request. Error: %s\n", liblte_error_text[err]);
return false;
}
/*Log unhandled Initial UE message IEs*/
m_s1ap_nas_transport.log_unhandled_initial_ue_message_ies(init_ue);
m_s1ap_log->info("Received Attach Request\n");
if(attach_req.eps_mobile_id.type_of_id!=LIBLTE_MME_EPS_MOBILE_ID_TYPE_IMSI){
m_s1ap_log->error("NAS Attach Request: Unhandle UE Id Type");
/*Get NAS Attach Request and PDN connectivity request messages*/
if(!m_s1ap_nas_transport.unpack_initial_ue_message(init_ue, &attach_req,&pdn_con_req))
{
//TODO set up error reply
return false;
}
//Get IMSI
imsi = 0;
for(int i=0;i<=14;i++)
{
for(int i=0;i<=14;i++){
imsi += attach_req.eps_mobile_id.imsi[i]*std::pow(10,14-i);
}
m_s1ap_log->console("IMSI: %015lu\n", imsi);
if(attach_req.old_p_tmsi_signature_present){}
if(attach_req.additional_guti_present){}
if(attach_req.last_visited_registered_tai_present){}
if(attach_req.drx_param_present){}
if(attach_req.ms_network_cap_present){}
if(attach_req.old_lai_present){}
if(attach_req.tmsi_status_present){}
if(attach_req.ms_cm2_present){}
if(attach_req.ms_cm3_present){}
if(attach_req.supported_codecs_present){}
if(attach_req.additional_update_type_present){}
if(attach_req.voice_domain_pref_and_ue_usage_setting_present){}
if(attach_req.device_properties_present){}
if(attach_req.old_guti_type_present){}
/*Handle PDN Connctivity Request*/
err = liblte_mme_unpack_pdn_connectivity_request_msg(&attach_req.esm_msg, &pdn_con_req);
if(err != LIBLTE_SUCCESS){
m_s1ap_log->error("Error unpacking NAS PDN Connectivity Request. Error: %s\n", liblte_error_text[err]);
return false;
}
m_s1ap_log->console("Attach request from IMSI: %015lu\n", imsi);
m_s1ap_log->info("Attach request from IMSI: %015lu\n", imsi);
//FIXME use this info
uint8_t eps_bearer_id = pdn_con_req.eps_bearer_id; //TODO: Unused
uint8_t proc_transaction_id = pdn_con_req.proc_transaction_id; //TODO: Transaction ID unused
if(pdn_con_req.pdn_type != LIBLTE_MME_PDN_TYPE_IPV4)
{
m_s1ap_log->error("PDN Connectivity Request: Only IPv4 connectivity supported.\n");
return false;
}
if(pdn_con_req.request_type != LIBLTE_MME_REQUEST_TYPE_INITIAL_REQUEST)
{
m_s1ap_log->error("PDN Connectivity Request: Only Initial Request supported.\n");
return false;
}
//Handle the optional flags
if(pdn_con_req.esm_info_transfer_flag_present){}
if(pdn_con_req.apn_present){}
if(pdn_con_req.protocol_cnfg_opts_present){}
if(pdn_con_req.device_properties_present){}
/*Log unhandled IEs*/
if(msg->S_TMSI_present){
m_s1ap_log->warning("S-TMSI present, but not handled.");
}
if(msg->CSG_Id_present){
m_s1ap_log->warning("S-TMSI present, but not handled.");
}
if(msg->GUMMEI_ID_present){
m_s1ap_log->warning("GUMMEI ID present, but not handled.");
}
if(msg->CellAccessMode_present){
m_s1ap_log->warning("Cell Access Mode present, but not handled.");
}
if(msg->GW_TransportLayerAddress_present){
m_s1ap_log->warning("GW Transport Layer present, but not handled.");
}
if(msg->GW_TransportLayerAddress_present){
m_s1ap_log->warning("GW Transport Layer present, but not handled.");
}
if(msg->RelayNode_Indicator_present){
m_s1ap_log->warning("Relay Node Indicator present, but not handled.");
}
if(msg->GUMMEIType_present){
m_s1ap_log->warning("GUMMEI Type present, but not handled.");
}
if(msg->Tunnel_Information_for_BBF_present){
m_s1ap_log->warning("Tunnel Information for BBF present, but not handled.");
}
if(msg->SIPTO_L_GW_TransportLayerAddress_present){
m_s1ap_log->warning("SIPTO GW Transport Layer Address present, but not handled.");
}
if(msg->LHN_ID_present){
m_s1ap_log->warning("LHN Id present, but not handled.");
}
uint8_t k_asme[32];
uint8_t autn[16];
@ -393,19 +306,8 @@ s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *msg
dw_nas->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = enb_ue_s1ap_id;
dw_nas->HandoverRestrictionList_present=false;
dw_nas->SubscriberProfileIDforRFP_present=false;
/*
typedef struct{
bool ext;
LIBLTE_S1AP_MME_UE_S1AP_ID_STRUCT MME_UE_S1AP_ID;
LIBLTE_S1AP_ENB_UE_S1AP_ID_STRUCT eNB_UE_S1AP_ID;
LIBLTE_S1AP_NAS_PDU_STRUCT NAS_PDU;
LIBLTE_S1AP_HANDOVERRESTRICTIONLIST_STRUCT HandoverRestrictionList;
bool HandoverRestrictionList_present;
LIBLTE_S1AP_SUBSCRIBERPROFILEIDFORRFP_STRUCT SubscriberProfileIDforRFP;
bool SubscriberProfileIDforRFP_present;
}LIBLTE_S1AP_MESSAGE_DOWNLINKNASTRANSPORT_STRUCT;
*/
//
LIBLTE_MME_AUTHENTICATION_REQUEST_MSG_STRUCT auth_req;
memcpy(auth_req.autn , autn, 16);
memcpy(auth_req.rand, rand, 16);
@ -415,7 +317,7 @@ s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *msg
// Pack NAS_PDU
nas_buffer = m_pool->allocate();
err = liblte_mme_pack_authentication_request_msg(&auth_req, (LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
LIBLTE_ERROR_ENUM err = liblte_mme_pack_authentication_request_msg(&auth_req, (LIBLTE_BYTE_MSG_STRUCT *) nas_buffer);
if(err != LIBLTE_SUCCESS)
{
m_s1ap_log->console("Error packing Athentication Request");

173
srsepc/src/mme/s1ap_nas_transport.cc
Unescape Escape View File

@ -31,6 +31,7 @@ namespace srsepc{
s1ap_nas_transport::s1ap_nas_transport()
{
m_pool = srslte::byte_buffer_pool::get_instance();
return;
}
@ -47,8 +48,53 @@ s1ap_nas_transport::set_log(srslte::log *s1ap_log)
}
bool
s1ap_nas_transport::unpack_initial_ue_message(LIBLTE_S1AP_MESSAGE_S1SETUPREQUEST_STRUCT *msg, uint64_t *imsi)
s1ap_nas_transport::unpack_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue,
LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req,
LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req )
{
/*Get NAS Attach Request Message*/
uint8_t pd, msg_type;
srslte::byte_buffer_t *nas_msg = m_pool->allocate();
memcpy(nas_msg->msg, &init_ue->NAS_PDU.buffer, init_ue->NAS_PDU.n_octets);
nas_msg->N_bytes = init_ue->NAS_PDU.n_octets;
liblte_mme_parse_msg_header((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, &pd, &msg_type);
if(msg_type!=LIBLTE_MME_MSG_TYPE_ATTACH_REQUEST){
m_s1ap_log->error("Unhandled NAS message within the Initial UE message\n");
return false;
}
LIBLTE_ERROR_ENUM err = liblte_mme_unpack_attach_request_msg((LIBLTE_BYTE_MSG_STRUCT *) nas_msg, attach_req);
if(err != LIBLTE_SUCCESS){
m_s1ap_log->error("Error unpacking NAS attach request. Error: %s\n", liblte_error_text[err]);
return false;
}
/*Log unhandled Attach Request IEs*/
log_unhandled_attach_request_ies(attach_req);
/*Get PDN Connectivity Request*/
err = liblte_mme_unpack_pdn_connectivity_request_msg(&attach_req->esm_msg, pdn_con_req);
if(err != LIBLTE_SUCCESS){
m_s1ap_log->error("Error unpacking NAS PDN Connectivity Request. Error: %s\n", liblte_error_text[err]);
return false;
}
if(pdn_con_req->pdn_type != LIBLTE_MME_PDN_TYPE_IPV4)
{
m_s1ap_log->error("PDN Connectivity Request: Only IPv4 connectivity supported.\n");
return false;
}
if(pdn_con_req->request_type != LIBLTE_MME_REQUEST_TYPE_INITIAL_REQUEST)
{
m_s1ap_log->error("PDN Connectivity Request: Only Initial Request supported.\n");
return false;
}
/*Log unhandled PDN connectivity request IEs*/
log_unhandled_pdn_con_request_ies(pdn_con_req);
m_pool->deallocate(nas_msg);
return true;
}
@ -65,4 +111,129 @@ s1ap_nas_transport::pack_authentication_request(uint8_t *autn,uint8_t *rand)
return true;
}
/*Helper functions*/
void
s1ap_nas_transport::log_unhandled_attach_request_ies(const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req)
{
if(attach_req->old_p_tmsi_signature_present)
{
m_s1ap_log->warning("NAS attach request: Old P-TMSI signature present, but not handled.");
}
if(attach_req->additional_guti_present)
{
m_s1ap_log->warning("NAS attach request: Aditional GUTI present, but not handled.");
}
if(attach_req->last_visited_registered_tai_present)
{
m_s1ap_log->warning("NAS attach request: Last visited registered TAI present, but not handled.");
}
if(attach_req->drx_param_present)
{
m_s1ap_log->warning("NAS attach request: DRX Param present, but not handled.");
}
if(attach_req->ms_network_cap_present)
{
m_s1ap_log->warning("NAS attach request: MS network cap present, but not handled.");
}
if(attach_req->old_lai_present)
{
m_s1ap_log->warning("NAS attach request: Old LAI present, but not handled.");
}
if(attach_req->tmsi_status_present)
{
m_s1ap_log->warning("NAS attach request: TSMI status present, but not handled.");
}
if(attach_req->ms_cm2_present)
{
m_s1ap_log->warning("NAS attach request: MS CM2 present, but not handled.");
}
if(attach_req->ms_cm3_present)
{
m_s1ap_log->warning("NAS attach request: MS CM3 present, but not handled.");
}
if(attach_req->supported_codecs_present)
{
m_s1ap_log->warning("NAS attach request: Supported CODECs present, but not handled.");
}
if(attach_req->additional_update_type_present)
{
m_s1ap_log->warning("NAS attach request: Additional Update Type present, but not handled.");
}
if(attach_req->voice_domain_pref_and_ue_usage_setting_present)
{
m_s1ap_log->warning("NAS attach request: Voice domain preference and UE usage setting present, but not handled.");
}
if(attach_req->device_properties_present)
{
m_s1ap_log->warning("NAS attach request: Device properties present, but not handled.");
}
if(attach_req->old_guti_type_present)
{
m_s1ap_log->warning("NAS attach request: Old GUTI type present, but not handled.");
}
return;
}
void
s1ap_nas_transport::log_unhandled_pdn_con_request_ies(const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req)
{
//Handle the optional flags
if(pdn_con_req->esm_info_transfer_flag_present)
{
m_s1ap_log->warning("PDN Connectivity request: ESM info transfer flag properties present, but not handled.");
}
if(pdn_con_req->apn_present)
{
m_s1ap_log->warning("PDN Connectivity request: APN present, but not handled.");
}
if(pdn_con_req->protocol_cnfg_opts_present)
{
m_s1ap_log->warning("PDN Connectivity request: Protocol Cnfg options present, but not handled.");
}
if(pdn_con_req->device_properties_present)
{
m_s1ap_log->warning("PDN Connectivity request: Device properties present, but not handled.");
}
}
void
s1ap_nas_transport::log_unhandled_initial_ue_message_ies(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue)
{
if(init_ue->S_TMSI_present){
m_s1ap_log->warning("S-TMSI present, but not handled.");
}
if(init_ue->CSG_Id_present){
m_s1ap_log->warning("S-TMSI present, but not handled.");
}
if(init_ue->GUMMEI_ID_present){
m_s1ap_log->warning("GUMMEI ID present, but not handled.");
}
if(init_ue->CellAccessMode_present){
m_s1ap_log->warning("Cell Access Mode present, but not handled.");
}
if(init_ue->GW_TransportLayerAddress_present){
m_s1ap_log->warning("GW Transport Layer present, but not handled.");
}
if(init_ue->GW_TransportLayerAddress_present){
m_s1ap_log->warning("GW Transport Layer present, but not handled.");
}
if(init_ue->RelayNode_Indicator_present){
m_s1ap_log->warning("Relay Node Indicator present, but not handled.");
}
if(init_ue->GUMMEIType_present){
m_s1ap_log->warning("GUMMEI Type present, but not handled.");
}
if(init_ue->Tunnel_Information_for_BBF_present){
m_s1ap_log->warning("Tunnel Information for BBF present, but not handled.");
}
if(init_ue->SIPTO_L_GW_TransportLayerAddress_present){
m_s1ap_log->warning("SIPTO GW Transport Layer Address present, but not handled.");
}
if(init_ue->LHN_ID_present){
m_s1ap_log->warning("LHN Id present, but not handled.");
}
return;
}
} //namespace srsepc

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