handle iexp

libi2pd/RouterInfo.cpp

@@ -264,6 +264,8 @@ namespace data
 						introducer.iTag = boost::lexical_cast<uint32_t>(value);
 					else if (!strcmp (key, "ikey"))
 						Base64ToByteStream (value, strlen (value), introducer.iKey, 32);
+					else if (!strcmp (key, "iexp"))
+						introducer.iExp = boost::lexical_cast<uint32_t>(value);
 				}
 				if (!s) return;
 			}	
@@ -478,6 +480,18 @@ namespace data
 						properties << ';';
 						i++;
 					}	
+					i = 0;
+					for (const auto& introducer: address.ssu->introducers)
+					{
+						if (introducer.iExp) // expiration is specified
+						{
+							WriteString ("iexp" + boost::lexical_cast<std::string>(i), properties);
+							properties << '=';
+							WriteString (boost::lexical_cast<std::string>(introducer.iExp), properties);
+							properties << ';';
+						}
+						i++;
+					}	
 				}	
 				// write intro key
 				WriteString ("key", properties);

libi2pd/RouterInfo.h

@@ -73,10 +73,12 @@ namespace data
 			typedef Tag<32> IntroKey; // should be castable to MacKey and AESKey
 			struct Introducer			
 			{
+				Introducer (): iExp (0) {};
 				boost::asio::ip::address iHost;
 				int iPort;
 				IntroKey iKey;
 				uint32_t iTag;
+				uint32_t iExp;
 			};
 
 			struct SSUExt