Adding CSubNet constructor over a single CNetAddr

src/net.cpp

@@ -488,7 +488,7 @@ bool CNode::IsBanned(CSubNet subnet)
 }
 
 void CNode::Ban(const CNetAddr& addr, const BanReason &banReason, int64_t bantimeoffset, bool sinceUnixEpoch) {
-    CSubNet subNet(addr.ToString()+(addr.IsIPv4() ? "/32" : "/128"));
+    CSubNet subNet(addr);
     Ban(subNet, banReason, bantimeoffset, sinceUnixEpoch);
 }
 
@@ -511,7 +511,7 @@ void CNode::Ban(const CSubNet& subNet, const BanReason &banReason, int64_t banti
 }
 
 bool CNode::Unban(const CNetAddr &addr) {
-    CSubNet subNet(addr.ToString()+(addr.IsIPv4() ? "/32" : "/128"));
+    CSubNet subNet(addr);
     return Unban(subNet);
 }
 

src/netbase.cpp

@@ -1291,6 +1291,13 @@ CSubNet::CSubNet(const std::string &strSubnet, bool fAllowLookup)
         network.ip[x] &= netmask[x];
 }
 
+CSubNet::CSubNet(const CNetAddr &addr):
+    valid(addr.IsValid())
+{
+    memset(netmask, 255, sizeof(netmask));
+    network = addr;
+}
+
 bool CSubNet::Match(const CNetAddr &addr) const
 {
     if (!valid || !addr.IsValid())

src/netbase.h

@@ -118,6 +118,9 @@ class CSubNet
         CSubNet();
         explicit CSubNet(const std::string &strSubnet, bool fAllowLookup = false);
 
+        //constructor for single ip subnet (<ipv4>/32 or <ipv6>/128)
+        explicit CSubNet(const CNetAddr &addr);
+
         bool Match(const CNetAddr &addr) const;
 
         std::string ToString() const;

src/test/netbase_tests.cpp

@@ -143,6 +143,17 @@ BOOST_AUTO_TEST_CASE(subnet_test)
     BOOST_CHECK(CSubNet("1:2:3:4:5:6:7:8/128").IsValid());
     BOOST_CHECK(!CSubNet("1:2:3:4:5:6:7:8/129").IsValid());
     BOOST_CHECK(!CSubNet("fuzzy").IsValid());
+
+    //CNetAddr constructor test
+    BOOST_CHECK(CSubNet(CNetAddr("127.0.0.1")).IsValid());
+    BOOST_CHECK(CSubNet(CNetAddr("127.0.0.1")).Match(CNetAddr("127.0.0.1")));
+    BOOST_CHECK(!CSubNet(CNetAddr("127.0.0.1")).Match(CNetAddr("127.0.0.2")));
+    BOOST_CHECK(CSubNet(CNetAddr("127.0.0.1")).ToString() == "127.0.0.1/255.255.255.255");
+
+    BOOST_CHECK(CSubNet(CNetAddr("1:2:3:4:5:6:7:8")).IsValid());
+    BOOST_CHECK(CSubNet(CNetAddr("1:2:3:4:5:6:7:8")).Match(CNetAddr("1:2:3:4:5:6:7:8")));
+    BOOST_CHECK(!CSubNet(CNetAddr("1:2:3:4:5:6:7:8")).Match(CNetAddr("1:2:3:4:5:6:7:9")));
+    BOOST_CHECK(CSubNet(CNetAddr("1:2:3:4:5:6:7:8")).ToString() == "1:2:3:4:5:6:7:8/ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 }
 
 BOOST_AUTO_TEST_SUITE_END()