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-rw-r--r--lib/kernel/doc/src/inet.xml19
-rw-r--r--lib/kernel/doc/src/inet_res.xml6
-rw-r--r--lib/kernel/src/inet.erl17
-rw-r--r--lib/kernel/src/inet_hosts.erl5
-rw-r--r--lib/kernel/src/inet_res.erl28
-rw-r--r--lib/kernel/test/inet_SUITE.erl25
6 files changed, 55 insertions, 45 deletions
diff --git a/lib/kernel/doc/src/inet.xml b/lib/kernel/doc/src/inet.xml
index abb045b744..9552332948 100644
--- a/lib/kernel/doc/src/inet.xml
+++ b/lib/kernel/doc/src/inet.xml
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>1997</year><year>2017</year>
+ <year>1997</year><year>2018</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -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>
@@ -582,6 +580,19 @@ get_tcpi_sacked(Sock) ->
</func>
<func>
+ <name name="ipv4_mapped_ipv6_address" arity="1" />
+ <fsummary>Convert to and from IPv4-mapped IPv6 address.</fsummary>
+ <desc>
+ <p>
+ Convert an IPv4 address to an IPv4-mapped IPv6 address
+ or the reverse. When converting from an IPv6 address
+ all but the 2 low words are ignored so this function also
+ works on some other types of addresses than IPv4-mapped.
+ </p>
+ </desc>
+ </func>
+
+ <func>
<name name="parse_strict_address" arity="1" />
<fsummary>Parse an IPv4 or IPv6 address strict.</fsummary>
<desc>
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 fe91b0d33e..4bad523dff 100644
--- a/lib/kernel/src/inet.erl
+++ b/lib/kernel/src/inet.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2017. 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.
@@ -34,7 +34,8 @@
ip/1, stats/0, options/0,
pushf/3, popf/1, close/1, gethostname/0, gethostname/1,
parse_ipv4_address/1, parse_ipv6_address/1, parse_ipv4strict_address/1,
- parse_ipv6strict_address/1, parse_address/1, parse_strict_address/1, ntoa/1]).
+ parse_ipv6strict_address/1, parse_address/1, parse_strict_address/1,
+ ntoa/1, ipv4_mapped_ipv6_address/1]).
-export([connect_options/2, listen_options/2, udp_options/2, sctp_options/2]).
-export([udp_module/1, tcp_module/1, tcp_module/2, sctp_module/1]).
@@ -675,6 +676,14 @@ parse_address(Addr) ->
parse_strict_address(Addr) ->
inet_parse:strict_address(Addr).
+-spec ipv4_mapped_ipv6_address(ip_address()) -> ip_address().
+ipv4_mapped_ipv6_address({D1,D2,D3,D4})
+ when (D1 bor D2 bor D3 bor D4) < 256 ->
+ {0,0,0,0,0,16#ffff,(D1 bsl 8) bor D2,(D3 bsl 8) bor D4};
+ipv4_mapped_ipv6_address({D1,D2,D3,D4,D5,D6,D7,D8})
+ when (D1 bor D2 bor D3 bor D4 bor D5 bor D6 bor D7 bor D8) < 65536 ->
+ {D7 bsr 8,D7 band 255,D8 bsr 8,D8 band 255}.
+
%% Return a list of available options
options() ->
[
@@ -1244,9 +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_hosts.erl b/lib/kernel/src/inet_hosts.erl
index 0bdf00ac30..fc653bf0d3 100644
--- a/lib/kernel/src/inet_hosts.erl
+++ b/lib/kernel/src/inet_hosts.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.
@@ -72,9 +72,6 @@ gethostbyname(Name, Type, Byname, Byaddr) ->
gethostbyaddr({A,B,C,D}=IP) when ?ip(A,B,C,D) ->
gethostbyaddr(IP, inet);
-%% ipv4 only ipv6 address
-gethostbyaddr({0,0,0,0,0,16#ffff=F,G,H}) when ?ip6(0,0,0,0,0,F,G,H) ->
- gethostbyaddr({G bsr 8, G band 255, H bsr 8, H band 255});
gethostbyaddr({A,B,C,D,E,F,G,H}=IP) when ?ip6(A,B,C,D,E,F,G,H) ->
gethostbyaddr(IP, inet6);
gethostbyaddr(Addr) when is_list(Addr) ->
diff --git a/lib/kernel/src/inet_res.erl b/lib/kernel/src/inet_res.erl
index 49aa5f8bda..6454802b04 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.
@@ -349,9 +349,6 @@ gethostbyaddr_tm({A,B,C,D} = IP, Timer) when ?ip(A,B,C,D) ->
{ok, HEnt} -> {ok, HEnt};
_ -> res_gethostbyaddr(dn_in_addr_arpa(A,B,C,D), IP, Timer)
end;
-%% ipv4 only ipv6 address
-gethostbyaddr_tm({0,0,0,0,0,16#ffff,G,H},Timer) when is_integer(G+H) ->
- gethostbyaddr_tm({G div 256, G rem 256, H div 256, H rem 256},Timer);
gethostbyaddr_tm({A,B,C,D,E,F,G,H} = IP, Timer) when ?ip6(A,B,C,D,E,F,G,H) ->
inet_db:res_update_conf(),
case inet_db:gethostbyaddr(IP) of
@@ -431,28 +428,7 @@ 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}.
diff --git a/lib/kernel/test/inet_SUITE.erl b/lib/kernel/test/inet_SUITE.erl
index ba0d075ef2..2e5f8c7d2c 100644
--- a/lib/kernel/test/inet_SUITE.erl
+++ b/lib/kernel/test/inet_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2017. 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.
@@ -40,7 +40,8 @@
lookup_bad_search_option/1,
getif/1,
getif_ifr_name_overflow/1,getservbyname_overflow/1, getifaddrs/1,
- parse_strict_address/1, simple_netns/1, simple_netns_open/1,
+ parse_strict_address/1, ipv4_mapped_ipv6_address/1,
+ simple_netns/1, simple_netns_open/1,
simple_bind_to_device/1, simple_bind_to_device_open/1]).
-export([get_hosts/1, get_ipv6_hosts/1, parse_hosts/1, parse_address/1,
@@ -667,6 +668,26 @@ parse_strict_address(Config) when is_list(Config) ->
{ok, {3089,3106,23603,50240,0,0,119,136}} =
inet:parse_strict_address("c11:0c22:5c33:c440::077:0088").
+ipv4_mapped_ipv6_address(Config) when is_list(Config) ->
+ {D1,D2,D3,D4} = IPv4Address =
+ {rand:uniform(256) - 1,
+ rand:uniform(256) - 1,
+ rand:uniform(256) - 1,
+ rand:uniform(256) - 1},
+ E7 = (D1 bsl 8) bor D2,
+ E8 = (D3 bsl 8) bor D4,
+ io:format("IPv4Address: ~p.~n", [IPv4Address]),
+ {0,0,0,0,0,65535,E7,E8} = inet:ipv4_mapped_ipv6_address(IPv4Address),
+ IPv6Address =
+ {rand:uniform(65536) - 1,
+ rand:uniform(65536) - 1,
+ rand:uniform(65536) - 1,
+ rand:uniform(65536) - 1,
+ rand:uniform(65536) - 1,
+ rand:uniform(65536) - 1, E7, E8},
+ IPv4Address = inet:ipv4_mapped_ipv6_address(IPv6Address),
+ ok.
+
t_gethostnative(Config) when is_list(Config) ->
%% this will result in 26 bytes sent which causes problem in Windows
%% if the port-program has not assured stdin to be read in BINARY mode
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 19:33:14 +0000