configurable netid

Config.cpp

@@ -49,6 +49,7 @@ namespace config {
       ("port",      value<uint16_t>()->default_value(0),                "Port to listen for incoming connections (default: auto)")
       ("ipv4",      value<bool>()->zero_tokens()->default_value(true),  "Enable communication through ipv4")
       ("ipv6",      value<bool>()->zero_tokens()->default_value(false), "Enable communication through ipv6")
+	  ("netid",		value<int>()->default_value(I2PD_NET_ID), "Specify NetID. Main I2P is 2") 	
       ("daemon",    value<bool>()->zero_tokens()->default_value(false), "Router will go to background after start")
       ("service",   value<bool>()->zero_tokens()->default_value(false), "Router will use system folders like '/var/lib/i2pd'")
       ("notransit", value<bool>()->zero_tokens()->default_value(false), "Router will not accept transit tunnels at startup")

I2NPProtocol.cpp

@@ -102,7 +102,7 @@ namespace i2p
 		{
 			RAND_bytes ((uint8_t *)&msgID, 4);
 			htobe32buf (buf + DELIVERY_STATUS_MSGID_OFFSET, msgID);
-			htobe64buf (buf + DELIVERY_STATUS_TIMESTAMP_OFFSET, I2PD_NET_ID); 
+			htobe64buf (buf + DELIVERY_STATUS_TIMESTAMP_OFFSET, i2p::context.GetNetID ()); 
 		}	
 		m->len += DELIVERY_STATUS_SIZE;
 		m->FillI2NPMessageHeader (eI2NPDeliveryStatus);

RouterContext.cpp

@@ -18,7 +18,8 @@ namespace i2p
 
 	RouterContext::RouterContext ():
 		m_LastUpdateTime (0), m_AcceptsTunnels (true), m_IsFloodfill (false), 
-		m_StartupTime (0), m_Status (eRouterStatusOK), m_Error (eRouterErrorNone)
+		m_StartupTime (0), m_Status (eRouterStatusOK), m_Error (eRouterErrorNone),
+		m_NetID (I2PD_NET_ID)
 	{
 	}
 
@@ -76,7 +77,8 @@ namespace i2p
 		}
 		routerInfo.SetCaps (i2p::data::RouterInfo::eReachable | 
 			i2p::data::RouterInfo::eSSUTesting | i2p::data::RouterInfo::eSSUIntroducer); // LR, BC
-        routerInfo.SetProperty ("netId", std::to_string (I2PD_NET_ID));
+		i2p::config::GetOption("netid", m_NetID);
+        routerInfo.SetProperty ("netId", std::to_string (m_NetID));
 		routerInfo.SetProperty ("router.version", I2P_VERSION);
 		routerInfo.CreateBuffer (m_Keys);
 		m_RouterInfo.SetRouterIdentity (GetIdentity ());

RouterContext.h

@@ -58,6 +58,8 @@ namespace i2p
 			void SetStatus (RouterStatus status);
 			RouterError GetError () const { return m_Error; };
 			void SetError (RouterError error) { m_Status = eRouterStatusError; m_Error = error; };
+			int GetNetID () const { return m_NetID; };
+			void SetNetID (int netID) { m_NetID = netID; };			
 
 			void UpdatePort (int port); // called from Daemon
 			void UpdateAddress (const boost::asio::ip::address& host);	// called from SSU or Daemon
@@ -117,6 +119,7 @@ namespace i2p
 			uint32_t m_BandwidthLimit; // allowed bandwidth
 			RouterStatus m_Status;
 			RouterError m_Error;
+			int m_NetID;
 			std::mutex m_GarlicMutex;
 	};
 

RouterInfo.cpp

@@ -13,6 +13,7 @@
 #include "Timestamp.h"
 #include "Log.h"
 #include "NetDb.h"
+#include "RouterContext.h"
 #include "RouterInfo.h"
 
 namespace i2p
@@ -286,7 +287,7 @@ namespace data
 			if (!strcmp (key, "caps"))
 				ExtractCaps (value);
 			// check netId
-			else if (!strcmp (key, ROUTER_INFO_PROPERTY_NETID) && atoi (value) != I2PD_NET_ID)
+			else if (!strcmp (key, ROUTER_INFO_PROPERTY_NETID) && atoi (value) != i2p::context.GetNetID ())
 			{
 				LogPrint (eLogError, "RouterInfo: Unexpected ", ROUTER_INFO_PROPERTY_NETID, "=", value);
 				m_IsUnreachable = true;		

docs/configuration.md

@@ -25,6 +25,7 @@ If you are upgrading your very old router (< 2.3.0) see also [this](config_opts_
 * --floodfill           - Router will be floodfill. false by default
 * --bandwidth=          - Bandwidth limit: integer in KBps or letters: L (32), O (256), P (2048), X (>9000)
 * --family=             - Name of a family, router belongs to
+* --netid=				- Network ID, router belongs to. Main I2P is 2.
 
 Windows-specific options: