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nas: initialize ctxt variable and only check ksi if ctxt is present

This commit is contained in:
Andre Puschmann 2017-12-05 22:06:30 +01:00
parent dd8bacf466
commit 3705baddc3
1 changed files with 10 additions and 8 deletions
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18
srsue/src/upper/nas.cc
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@ -44,7 +44,7 @@ namespace srsue {
********************************************************************/
nas::nas()
: state(EMM_STATE_DEREGISTERED), plmn_selection(PLMN_SELECTED), have_guti(false), ip_addr(0), eps_bearer_id(0)
: state(EMM_STATE_DEREGISTERED), plmn_selection(PLMN_SELECTED), have_guti(false), have_ctxt(false), ip_addr(0), eps_bearer_id(0)
{
ctxt.rx_count = 0;
ctxt.tx_count = 0;
@ -548,13 +548,15 @@ void nas::parse_security_mode_command(uint32_t lcid, byte_buffer_t *pdu)
return;
}
if(sec_mode_cmd.nas_ksi.nas_ksi != ctxt.ksi)
{
nas_log->warning("Sending Security Mode Reject due to key set ID mismatch\n");
send_security_mode_reject(LIBLTE_MME_EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED);
pool->deallocate(pdu);
return;
if (have_ctxt) {
if(sec_mode_cmd.nas_ksi.nas_ksi != ctxt.ksi) {
nas_log->warning("Sending Security Mode Reject due to key set ID mismatch\n");
send_security_mode_reject(LIBLTE_MME_EMM_CAUSE_SECURITY_MODE_REJECTED_UNSPECIFIED);
pool->deallocate(pdu);
return;
}
}
// MME is setting up security context
// TODO: check nonce (not sent by Amari)
@ -744,7 +746,7 @@ void nas::send_attach_request() {
nas_log->info("Sending attach request\n");
rrc->write_sdu(cfg.lcid, msg);
if(have_ctxt) {
if (have_ctxt) {
ctxt.tx_count++;
}
}