Addind replayed UE security capabilities.

srsepc/hdr/mme/s1ap_common.h

@@ -24,6 +24,7 @@
 #include "srslte/common/security.h"
 #include "srslte/asn1/gtpc_ies.h"
 #include "srslte/asn1/liblte_s1ap.h"
+#include "srslte/asn1/liblte_mme.h"
 #include <netinet/sctp.h>
 
 namespace srsepc{
@@ -90,6 +91,7 @@ typedef struct{
   struct   sctp_sndrcvinfo enb_sri;
   eps_security_ctx_t security_ctxt;
   erab_ctx_t erabs_ctx[MAX_ERABS_PER_UE];
+  LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT ue_network_cap;
 } ue_ctx_t;
 }//namespace
 #endif

srsepc/src/mme/s1ap.cc

@@ -369,11 +369,16 @@ s1ap::handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *ini
   m_s1ap_log->console("Attach request from IMSI: %015lu\n", imsi);
   m_s1ap_log->info("Attach request from IMSI: %015lu\n", imsi);  
 
+  //Get UE security capabilities
+  memcpy(&ue_ctx.ue_network_cap, &attach_req.ue_network_cap, sizeof(LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT));
+
   //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
   m_s1ap_log->console("EPS Bearer id: %d\n", eps_bearer_id);
 
+
+
   //Add eNB info to UE ctxt
   memcpy(&ue_ctx.enb_sri, enb_sri, sizeof(struct sctp_sndrcvinfo));
 

srsepc/src/mme/s1ap_nas_transport.cc

@@ -266,11 +266,29 @@ s1ap_nas_transport::pack_security_mode_command(srslte::byte_buffer_t *reply_msg,
   sm_cmd.selected_nas_sec_algs.type_of_eia = LIBLTE_MME_TYPE_OF_INTEGRITY_ALGORITHM_128_EIA1;
 
   sm_cmd.nas_ksi.tsc_flag=LIBLTE_MME_TYPE_OF_SECURITY_CONTEXT_FLAG_NATIVE;
-  sm_cmd.nas_ksi.nas_ksi=0;
-
-  //FIXME UE security cap not used by srsUE.
-  //sm_cmd.ue_security_cap;
-
+  sm_cmd.nas_ksi.nas_ksi=6; //111 no key available
+
+  //Replay UE security cap
+  memcpy(sm_cmd.ue_security_cap.eea,ue_ctx->ue_network_cap.eea,8*sizeof(bool));
+  memcpy(sm_cmd.ue_security_cap.eia,ue_ctx->ue_network_cap.eia,8*sizeof(bool));
+  sm_cmd.ue_security_cap.uea_present = ue_ctx->ue_network_cap.uea_present;
+  memcpy(sm_cmd.ue_security_cap.uea,ue_ctx->ue_network_cap.uea,8*sizeof(bool));
+  sm_cmd.ue_security_cap.uia_present = ue_ctx->ue_network_cap.uia_present;
+  memcpy(sm_cmd.ue_security_cap.uia,ue_ctx->ue_network_cap.uia,8*sizeof(bool));
+  sm_cmd.ue_security_cap.gea_present = false;
+  //memcpy(sm_cmd.ue_security_cap.gea,ue_ctx->ue_network_cap.gea,8*sizeof(bool));
+  /*
+    typedef struct{
+    bool eea[8];
+    bool eia[8];
+    bool uea[8];
+    bool uea_present;
+    bool uia[8];
+    bool uia_present;
+    bool gea[8];
+    bool gea_present;
+    }LIBLTE_MME_UE_SECURITY_CAPABILITIES_STRUCT;
+   */
   sm_cmd.imeisv_req_present=false;
   sm_cmd.nonce_ue_present=false;
   sm_cmd.nonce_mme_present=false;