UE authentication procedure improvements

src/ue/nas/usim/sqn_mng.cpp

@@ -13,8 +13,8 @@
 namespace nr::ue
 {
 
-SqnManager::SqnManager(uint64_t indBitLen, uint64_t wrappingDelta, uint64_t limit)
-    : m_indBitLen{indBitLen}, m_wrappingDelta{wrappingDelta}, m_limit{limit}, m_sqnArr(1ull << m_indBitLen)
+SqnManager::SqnManager(uint64_t indBitLen, uint64_t wrappingDelta)
+    : m_indBitLen{indBitLen}, m_wrappingDelta{wrappingDelta}, m_sqnArr(1ull << m_indBitLen)
 {
     if (m_indBitLen < 2 || m_indBitLen > 16)
         throw std::runtime_error("bad indBitLen");
@@ -50,8 +50,6 @@ bool SqnManager::checkSqn(uint64_t sqn)
 
     if (seq - getSeqMs() > m_wrappingDelta)
         return false;
-    if (getSeqMs() - seq >= m_limit)
-        return false;
     if (seq <= getSeqFromSqn(m_sqnArr[ind]))
         return false;
 

src/ue/nas/usim/sqn_mng.hpp

@@ -22,12 +22,11 @@ class SqnManager
   private:
     uint64_t m_indBitLen;
     uint64_t m_wrappingDelta;
-    uint64_t m_limit;
 
     std::vector<uint64_t> m_sqnArr;
 
   public:
-    SqnManager(uint64_t indBitLen, uint64_t wrappingDelta, uint64_t limit);
+    SqnManager(uint64_t indBitLen, uint64_t wrappingDelta);
 
   private:
     [[nodiscard]] uint64_t getSeqFromSqn(uint64_t sqn) const;

src/ue/nas/usim/usim.cpp

@@ -20,7 +20,7 @@ void ue::Usim::initialize(bool hasSupi, const UeConfig::Initials &initials)
     m_defConfiguredNssai = initials.defaultConfiguredNssai;
     m_configuredNssai = initials.configuredNssai;
 
-    m_sqnMng = std::make_unique<SqnManager>(5ull, 1ull << 28ull, ~0ull);
+    m_sqnMng = std::make_unique<SqnManager>(5ull, 1ull << 28ull);
 }
 
 bool Usim::isValid()