Stop returning V4MAPPED addresses

4 files changed, 6 insertions, 33 deletions

diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml
index 5c56247820..9552332948 100644
--- a/lib/kernel/doc/src/inet.xml
+++ b/lib/kernel/doc/src/inet.xml
@@ -277,9 +277,7 @@ fe80::204:acff:fe17:bf38
         <p>Returns a <c>hostent</c> record for the host with the specified
           hostname.</p>
         <p>If resolver option <c>inet6</c> is <c>true</c>,
-          an IPv6 address is looked up. If that fails,
-          the IPv4 address is looked up and returned on
-          IPv6-mapped IPv4 format.</p>
+          an IPv6 address is looked up.</p>
       </desc>
     </func>
 
diff --git a/lib/kernel/doc/src/inet_res.xml b/lib/kernel/doc/src/inet_res.xml
index 3454e3c6f9..351d86a93a 100644
--- a/lib/kernel/doc/src/inet_res.xml
+++ b/lib/kernel/doc/src/inet_res.xml
@@ -4,7 +4,7 @@
 <erlref>
   <header>
     <copyright>
-      <year>2009</year><year>2015</year>
+      <year>2009</year><year>2018</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -230,9 +230,7 @@ inet_dns:record_type(_) -> undefined.</pre>
           <seealso marker="#getbyname/2"><c>getbyname/2,3</c></seealso>.
         </p>
         <p>If resolver option <c>inet6</c> is <c>true</c>,
-          an IPv6 address is looked up. If that fails,
-          the IPv4 address is looked up and returned on
-          IPv6-mapped IPv4 format.</p>
+          an IPv6 address is looked up.</p>
       </desc>
     </func>
 
diff --git a/lib/kernel/src/inet.erl b/lib/kernel/src/inet.erl
index fd26a88d42..4bad523dff 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -1253,9 +1253,7 @@ gethostbyname_string(Name, Type)
 	    inet ->
 		inet_parse:ipv4_address(Name);
 	    inet6 ->
-		%% XXX should we really translate IPv4 addresses here
-		%% even if we do not know if this host can do IPv6?
-		inet_parse:ipv6_address(Name)
+		inet_parse:ipv6strict_address(Name)
 	end of
 	{ok,IP} ->
 	    {ok,make_hostent(Name, [IP], [], Type)};
diff --git a/lib/kernel/src/inet_res.erl b/lib/kernel/src/inet_res.erl
index 49aa5f8bda..58017c62fb 100644
--- a/lib/kernel/src/inet_res.erl
+++ b/lib/kernel/src/inet_res.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2018. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -431,28 +431,7 @@ gethostbyname(Name,Family,Timeout) ->
 gethostbyname_tm(Name,inet,Timer) ->
     getbyname_tm(Name,?S_A,Timer);
 gethostbyname_tm(Name,inet6,Timer) ->
-    case getbyname_tm(Name,?S_AAAA,Timer) of
-	{ok,HEnt} -> {ok,HEnt};
-	{error,nxdomain} ->
-	    case getbyname_tm(Name, ?S_A,Timer) of
-		{ok, HEnt} ->
-		    %% rewrite to a ipv4 only ipv6 address
-		    {ok,
-		     HEnt#hostent {
-		       h_addrtype = inet6,
-		       h_length = 16,
-		       h_addr_list = 
-		       lists:map(
-			 fun({A,B,C,D}) ->
-				 {0,0,0,0,0,16#ffff,A*256+B,C*256+D}
-			 end, HEnt#hostent.h_addr_list)
-		      }};
-		Error ->
-		    Error
-	    end;
-	Error ->
-	    Error
-    end;
+    getbyname_tm(Name,?S_AAAA,Timer);
 gethostbyname_tm(_Name, _Family, _Timer) ->
     {error, einval}.