Fixed boundary IP cases. Fixed error with IPv6 address when using IPv4 BIN.

Author: ip2location-com

ip2location.erl

@@ -30,7 +30,7 @@
 -define(IF(Cond), (case (Cond) of true -> (0); false -> (1) end)).
 
 apiversion() ->
-	"8.6.1".
+	"8.6.2".
 
 getapiversion() ->
 	io:format("API Version: ~p~n", [apiversion()]).
@@ -369,18 +369,57 @@ query(Ip) ->
 			Result = case inet:parse_address(Ip) of
 			{ok, {X1, X2, X3, X4}} ->
 				Ipnum = (X1 bsl 24) + (X2 bsl 16) + (X3 bsl 8) + (X4),
-				search4(S, Ipnum, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
+				if
+					Ipnum == 4294967295 ->
+						Ipnum2 = Ipnum - 1;
+					true ->
+						Ipnum2 = Ipnum
+				end,
+				search4(S, Ipnum2, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
 			{ok, {X1, X2, X3, X4, X5, X6, X7, X8}} ->
 				Ipnum = (X1 bsl 112) + (X2 bsl 96) + (X3 bsl 80) + (X4 bsl 64) + (X5 bsl 48) + (X6 bsl 32) + (X7 bsl 16) + X8,
 				if
 					Ipnum >= Fromv4mapped andalso Ipnum =< Tov4mapped ->
-						search4(S, Ipnum - Fromv4mapped, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
+						Ipnum2 = Ipnum - Fromv4mapped,
+						if
+							Ipnum2 == 4294967295 ->
+								Ipnum3 = Ipnum2 - 1;
+							true ->
+								Ipnum3 = Ipnum2
+						end,
+						search4(S, Ipnum3, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
 					Ipnum >= From6to4 andalso Ipnum =< To6to4 ->
-						search4(S, (Ipnum bsr 80) band Last32bits, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
+						Ipnum2 = (Ipnum bsr 80) band Last32bits,
+						if
+							Ipnum2 == 4294967295 ->
+								Ipnum3 = Ipnum2 - 1;
+							true ->
+								Ipnum3 = Ipnum2
+						end,
+						search4(S, Ipnum3, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
 					Ipnum >= Fromteredo andalso Ipnum =< Toteredo ->
-						search4(S, ((bnot Ipnum) band Last32bits), Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
+						Ipnum2 = (bnot Ipnum) band Last32bits,
+						if
+							Ipnum2 == 4294967295 ->
+								Ipnum3 = Ipnum2 - 1;
+							true ->
+								Ipnum3 = Ipnum2
+						end,
+						search4(S, Ipnum3, Databasetype, 0, Ipv4databasecount, Ipv4databaseaddr, Ipv4indexbaseaddr, Ipv4columnsize);
 					true ->
-						search6(S, Ipnum, Databasetype, 0, Ipv6databasecount, Ipv6databaseaddr, Ipv6indexbaseaddr, Ipv6columnsize)
+						if
+							Ipv6databasecount > 0 ->
+								if
+									Ipnum == 340282366920938463463374607431768211455 ->
+										Ipnum2 = Ipnum - 1;
+									true ->
+										Ipnum2 = Ipnum
+								end,
+								search6(S, Ipnum2, Databasetype, 0, Ipv6databasecount, Ipv6databaseaddr, Ipv6indexbaseaddr, Ipv6columnsize);
+							true ->
+								io:format("Error: IPv6 address is missing in IPv4 BIN.~n", []),
+								{} % return empty
+						end
 				end;
 			{_, _} ->
 				io:format("Error: Invalid IP address.~n", []),

mix.exs

@@ -4,7 +4,7 @@ defmodule IP2LocationErlang.MixProject do
   def project() do
     [
       app: :ip2location_erlang,
-      version: "8.6.1",
+      version: "8.6.2",
       elixir: "~> 1.0",
       build_embedded: Mix.env == :prod,
       start_permanent: Mix.env == :prod,