commit 9c660f6425436863cbd5649e480f322ca458262d
author Rongli Sun <rongli@google.com> Tue Jul 14 11:53:43 2020 +0800
committer GitHub <noreply@github.com> Mon Jul 13 20:53:43 2020 -0700
tree 53d1349a5910d84e25bb6adf7f0409fb3f1bdaf9
parent b9a7903f191e0acc4741b57313f53167f6a1077d

[dua] add `IsDomainUnicast()` helper method (#5230)

src/core/backbone_router/leader.cpp

diff --git a/src/core/backbone_router/leader.cpp b/src/core/backbone_router/leader.cpp
index 353f6f5..5453f08 100644
--- a/src/core/backbone_router/leader.cpp
+++ b/src/core/backbone_router/leader.cpp
@@ -288,6 +288,11 @@
 #endif
 }
 
+bool Leader::IsDomainUnicast(const Ip6::Address &aAddress) const
+{
+    return HasDomainPrefix() && aAddress.PrefixMatch(mDomainPrefix.mPrefix) >= mDomainPrefix.mLength;
+}
+
 } // namespace BackboneRouter
 } // namespace ot
 

src/core/backbone_router/leader.hpp

diff --git a/src/core/backbone_router/leader.hpp b/src/core/backbone_router/leader.hpp
index 08df804..5df7ac0 100644
--- a/src/core/backbone_router/leader.hpp
+++ b/src/core/backbone_router/leader.hpp
@@ -152,6 +152,17 @@
      */
     bool HasDomainPrefix(void) const { return (mDomainPrefix.mLength > 0); }
 
+    /**
+     * This method indicates whether or not the address is a Domain Unicast Address.
+     *
+     * @param[in]  aAddress A reference to the address.
+     *
+     * @retval true  @p aAddress is a domain unicast address.
+     * @retval false @p aAddress is not a domain unicast address.
+     *
+     */
+    bool IsDomainUnicast(const Ip6::Address &aAddress) const;
+
 private:
     void UpdateBackboneRouterPrimary(void);
     void UpdateDomainPrefixConfig(void);