Use better code and use default c++ std for msvc

230113-civ6hooksendto/hookdll.cpp

@@ -12,7 +12,7 @@ Hook *sendto_hook;
 SockQueue sockqueue;
 
 // 枚举当前所有可用网卡的IPv4地址
-std::vector<in_addr> enum_addr()
+const std::vector<in_addr> &enum_addr()
 {
     static std::vector<in_addr> list;
     hostent *phost = gethostbyname(""); // 获取本机网卡
@@ -52,7 +52,7 @@ int WINAPI fake_sendto(SOCKET s, const char *buf, int len, int flags, const sock
             result = sendto(s, buf, len, flags, to, tolen);
             getsockname(s, (sockaddr *)&addr_self, &namelen); // 重新获取
         }
-        std::vector<in_addr> list = enum_addr();
+        const std::vector<in_addr> &list = enum_addr();
         // 向列表中的每一个地址转发广播
         for (int i = 0; i < list.size(); i++) {
             addr_self.sin_addr = list[i]; // 把新的地址换上去，然后发送

230113-civ6hooksendto/hookdll.vcxproj

@@ -78,7 +78,7 @@
       <Optimization>Disabled</Optimization>
       <AdditionalModuleDependencies>
       </AdditionalModuleDependencies>
-      <LanguageStandard>stdcpp20</LanguageStandard>
+      <LanguageStandard>Default</LanguageStandard>
     </ClCompile>
     <Link>
       <TargetMachine>MachineX86</TargetMachine>
@@ -97,7 +97,7 @@
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <AdditionalModuleDependencies>
       </AdditionalModuleDependencies>
-      <LanguageStandard>stdcpp20</LanguageStandard>
+      <LanguageStandard>Default</LanguageStandard>
     </ClCompile>
     <Link>
       <TargetMachine>MachineX86</TargetMachine>
@@ -114,7 +114,7 @@
     <ClCompile>
       <AdditionalModuleDependencies>
       </AdditionalModuleDependencies>
-      <LanguageStandard>stdcpp20</LanguageStandard>
+      <LanguageStandard>Default</LanguageStandard>
     </ClCompile>
     <Link>
       <EntryPointSymbol>
@@ -126,7 +126,7 @@
     <ClCompile>
       <AdditionalModuleDependencies>
       </AdditionalModuleDependencies>
-      <LanguageStandard>stdcpp20</LanguageStandard>
+      <LanguageStandard>Default</LanguageStandard>
     </ClCompile>
     <Link>
       <EntryPointSymbol>