%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(inet_SUITE).
-include("test_server.hrl").
-include_lib("kernel/include/inet.hrl").
-include_lib("kernel/src/inet_dns.hrl").
-export([all/1, t_gethostbyaddr/1, t_getaddr/1, t_gethostbyname/1,
t_gethostbyaddr_v6/1, t_getaddr_v6/1, t_gethostbyname_v6/1,
ipv4_to_ipv6/1, host_and_addr/1, parse/1, t_gethostnative/1,
gethostnative_parallell/1, cname_loop/1,
gethostnative_soft_restart/1,gethostnative_debug_level/1,getif/1]).
-export([get_hosts/1, get_ipv6_hosts/1, parse_hosts/1,
kill_gethost/0, parallell_gethost/0]).
-export([init_per_testcase/2, end_per_testcase/2]).
all(suite) ->
[t_gethostbyaddr, t_gethostbyname, t_getaddr,
t_gethostbyaddr_v6, t_gethostbyname_v6, t_getaddr_v6,
ipv4_to_ipv6, host_and_addr, parse,t_gethostnative,
gethostnative_parallell, cname_loop,
gethostnative_debug_level,gethostnative_soft_restart,
getif].
init_per_testcase(_Func, Config) ->
Dog = test_server:timetrap(test_server:seconds(60)),
[{watchdog,Dog}|Config].
end_per_testcase(_Func, Config) ->
Dog = ?config(watchdog, Config),
test_server:timetrap_cancel(Dog).
t_gethostbyaddr(doc) -> "Test the inet:gethostbyaddr/1 function.";
t_gethostbyaddr(Config) when is_list(Config) ->
?line {Name,FullName,IPStr,IP,Aliases,_,_} = ?config(test_host_ipv4_only, Config),
?line {ok,HEnt} = inet:gethostbyaddr(IPStr),
?line {ok,HEnt} = inet:gethostbyaddr(IP),
?line {error,Error} = inet:gethostbyaddr(Name),
?line ok = io:format("Failure reason: ~p: ~s",
[error,inet:format_error(Error)]),
?line HEnt_ = HEnt#hostent{h_addrtype = inet,
h_length = 4,
h_addr_list = [IP]},
?line HEnt_ = HEnt,
case {os:type(),os:version()} of
{{unix,freebsd},{5,0,0}} ->
%% The alias list seems to be buggy in FreeBSD 5.0.0.
?line check_elems([{HEnt#hostent.h_name,[Name,FullName]}]),
io:format("Buggy alias list: ~p", [HEnt#hostent.h_aliases]),
ok;
_ ->
?line check_elems([{HEnt#hostent.h_name,[Name,FullName]},
{HEnt#hostent.h_aliases,[[],Aliases]}])
end,
?line {_DName, _DFullName, DIPStr, DIP, _, _, _} =
?config(test_dummy_host, Config),
?line {error,nxdomain} = inet:gethostbyaddr(DIPStr),
?line {error,nxdomain} = inet:gethostbyaddr(DIP),
ok.
t_gethostbyaddr_v6(doc) -> "Test the inet:gethostbyaddr/1 inet6 function.";
t_gethostbyaddr_v6(Config) when is_list(Config) ->
?line {Name6, FullName6, IPStr6, IP6, Aliases6} =
?config(test_host_ipv6_only, Config),
?line case inet:gethostbyaddr(IPStr6) of
%% Even if IPv6 is not supported, the native resolver may succeed
%% looking up the host. DNS lookup will probably fail.
{error,nxdomain} ->
{skip, "IPv6 test fails! IPv6 not supported on this host!?"};
{ok,HEnt6} ->
?line {ok,HEnt6} = inet:gethostbyaddr(IP6),
?line {error,Error6} = inet:gethostbyaddr(Name6),
?line ok = io:format("Failure reason: ~p: ~s",
[Error6, inet:format_error(Error6)]),
?line HEnt6_ = HEnt6#hostent{h_addrtype = inet6,
h_length = 16,
h_addr_list = [IP6]},
?line HEnt6_ = HEnt6,
?line check_elems([{HEnt6#hostent.h_name,[Name6,FullName6]},
{HEnt6#hostent.h_aliases,[[],Aliases6]}]),
?line {_DName6, _DFullName6, DIPStr6, DIP6, _} =
?config(test_dummy_ipv6_host, Config),
?line {error,nxdomain} = inet:gethostbyaddr(DIPStr6),
?line {error,nxdomain} = inet:gethostbyaddr(DIP6),
ok
end.
t_gethostbyname(doc) -> "Test the inet:gethostbyname/1 function.";
t_gethostbyname(suite) -> [];
t_gethostbyname(Config) when is_list(Config) ->
?line {Name,FullName,IPStr,IP,Aliases,IP_46_Str,_} =
?config(test_host_ipv4_only, Config),
?line {ok,_} = inet:gethostbyname(IPStr),
?line {ok,HEnt} = inet:gethostbyname(Name),
?line {ok,HEnt} = inet:gethostbyname(list_to_atom(Name)),
?line HEnt_ = HEnt#hostent{h_addrtype = inet,
h_length = 4,
h_addr_list = [IP]},
?line HEnt_ = HEnt,
?line check_elems([{HEnt#hostent.h_name,[Name,FullName]},
{HEnt#hostent.h_aliases,[[],Aliases]}]),
?line {ok,HEntF} = inet:gethostbyname(FullName),
?line HEntF_ = HEntF#hostent{h_name = FullName,
h_addrtype = inet,
h_length = 4,
h_addr_list = [IP]},
?line HEntF_ = HEntF,
?line check_elems([{HEnt#hostent.h_aliases,[[],Aliases]}]),
?line {DName, _DFullName, _DIPStr, _DIP, _, _, _} =
?config(test_dummy_host, Config),
?line {error,nxdomain} = inet:gethostbyname(DName),
?line {error,nxdomain} = inet:gethostbyname(IP_46_Str).
t_gethostbyname_v6(doc) -> "Test the inet:gethostbyname/1 inet6 function.";
t_gethostbyname_v6(suite) -> [];
t_gethostbyname_v6(Config) when is_list(Config) ->
?line {Name, _, _, _,Aliases,IP_46_Str,IP_46} =
?config(test_host_ipv4_only, Config),
case {inet:gethostbyname(IP_46_Str, inet6),
inet:gethostbyname(Name, inet6)} of
{{ok,HEnt46},{ok,_}} ->
?line HEnt46_ = HEnt46#hostent{h_name = IP_46_Str,
h_addrtype = inet6,
h_length = 16,
h_addr_list = [IP_46]},
?line HEnt46_ = HEnt46,
?line check_elems([{HEnt46#hostent.h_aliases,[[],Aliases]}]),
?line {Name6, FullName6, IPStr6, IP6, Aliases6} =
?config(test_host_ipv6_only, Config),
?line {ok,_} = inet:gethostbyname(IPStr6, inet6),
?line {ok,HEnt6} = inet:gethostbyname(Name6, inet6),
?line {ok,HEnt6} = inet:gethostbyname(list_to_atom(Name6), inet6),
?line case HEnt6#hostent.h_addr_list of
[IP6] -> % ipv6 ok
?line HEnt6_ = HEnt6#hostent{h_addrtype = inet6,
h_length = 16,
h_addr_list = [IP6]},
?line HEnt6_ = HEnt6,
?line check_elems([{HEnt6#hostent.h_name,[Name6,FullName6]},
{HEnt6#hostent.h_aliases,[[],Aliases6]}]);
_ -> % ipv4 compatible addr
?line {ok,HEnt4} = inet:gethostbyname(Name6, inet),
?line [IP4] = HEnt4#hostent.h_addr_list,
?line {ok,IP46_2} =
inet_parse:ipv6_address("::ffff:"++inet_parse:ntoa(IP4)),
?line HEnt6_ = HEnt6#hostent{h_addrtype = inet6,
h_length = 16,
h_addr_list = [IP46_2]},
?line HEnt6_ = HEnt6,
?line check_elems([{HEnt6#hostent.h_name,[Name6,FullName6]}])
end,
?line {ok,HEntF6} = inet:gethostbyname(FullName6, inet6),
?line case HEntF6#hostent.h_addr_list of
[IP6] -> % ipv6 ok
?line HEntF6_ = HEntF6#hostent{h_name = FullName6,
h_addrtype = inet6,
h_length = 16,
h_addr_list = [IP6]},
?line HEntF6_ = HEntF6,
?line check_elems([{HEntF6#hostent.h_aliases,[[],Aliases6]}]);
_ -> % ipv4 compatible addr
?line {ok,HEntF4} = inet:gethostbyname(FullName6, inet),
?line [IPF4] = HEntF4#hostent.h_addr_list,
?line {ok,IPF46_2} =
inet_parse:ipv6_address("::ffff:"++inet_parse:ntoa(IPF4)),
?line HEntF6_ = HEntF6#hostent{h_addrtype = inet6,
h_length = 16,
h_addr_list = [IPF46_2]},
?line HEntF6_ = HEntF6,
?line check_elems([{HEntF6#hostent.h_name,[Name6,FullName6]}])
end,
?line {DName6, _DFullName6, _DIPStr6, _DIP6, _} =
?config(test_dummy_ipv6_host, Config),
?line {error,nxdomain} = inet:gethostbyname(DName6, inet6),
ok;
{_,_} ->
{skip, "IPv6 is not supported on this host"}
end.
check_elems([{Val,Tests} | Elems]) ->
check_elem(Val, Tests, Tests),
check_elems(Elems);
check_elems([]) -> ok.
check_elem(Val, [Val|_], _) -> ok;
check_elem(Val, [_|Tests], Tests0) ->
check_elem(Val, Tests, Tests0);
check_elem(Val, [], Tests0) ->
?t:fail({no_match,Val,Tests0}).
t_getaddr(doc) -> "Test the inet:getaddr/2 function.";
t_getaddr(suite) -> [];
t_getaddr(Config) when is_list(Config) ->
?line {Name,FullName,IPStr,IP,_,IP_46_Str,IP46} =
?config(test_host_ipv4_only, Config),
?line {ok,IP} = inet:getaddr(list_to_atom(Name), inet),
?line {ok,IP} = inet:getaddr(Name, inet),
?line {ok,IP} = inet:getaddr(FullName, inet),
?line {ok,IP} = inet:getaddr(IP, inet),
?line {ok,IP} = inet:getaddr(IPStr, inet),
?line {error,nxdomain} = inet:getaddr(IP_46_Str, inet),
?line {error,eafnosupport} = inet:getaddr(IP46, inet),
?line {DName, DFullName, DIPStr, DIP, _, _, _} = ?config(test_dummy_host, Config),
?line {error,nxdomain} = inet:getaddr(DName, inet),
?line {error,nxdomain} = inet:getaddr(DFullName, inet),
?line {ok,DIP} = inet:getaddr(DIPStr, inet),
?line {ok,DIP} = inet:getaddr(DIP, inet).
t_getaddr_v6(doc) -> "Test the inet:getaddr/2 function.";
t_getaddr_v6(suite) -> [];
t_getaddr_v6(Config) when is_list(Config) ->
?line {Name,FullName,IPStr,_IP,_,IP_46_Str,IP46} =
?config(test_host_ipv4_only, Config),
case {inet:getaddr(IP_46_Str, inet6),inet:getaddr(Name, inet6)} of
{{ok,IP46},{ok,_}} ->
%% Since we suceeded in parsing an IPv6 address string and
%% look up the name, this computer fully supports IPv6.
?line {ok,IP46} = inet:getaddr(IP46, inet6),
?line {ok,IP46} = inet:getaddr(Name, inet6),
?line {ok,IP46} = inet:getaddr(FullName, inet6),
?line IP4toIP6 = inet:getaddr(IPStr, inet6),
?line case IP4toIP6 of
{ok,IP46} -> % only native can do this
?line true = lists:member(native,
inet_db:res_option(lookup));
{error,nxdomain} ->
ok
end,
?line {Name6, FullName6, IPStr6, IP6, _} =
?config(test_host_ipv6_only, Config),
?line {ok,_} = inet:getaddr(list_to_atom(Name6), inet6),
?line {ok,_} = inet:getaddr(Name6, inet6),
?line {ok,_} = inet:getaddr(FullName6, inet6),
?line {ok,IP6} = inet:getaddr(IP6, inet6),
?line {ok,IP6} = inet:getaddr(IPStr6, inet6),
?line {DName6, DFullName6, DIPStr6, DIP6, _} =
?config(test_dummy_ipv6_host, Config),
?line {error,nxdomain} = inet:getaddr(DName6, inet6),
?line {error,nxdomain} = inet:getaddr(DFullName6, inet6),
?line {ok,DIP6} = inet:getaddr(DIPStr6, inet6),
?line {ok,DIP6} = inet:getaddr(DIP6, inet6),
ok;
{_,_} ->
{skip, "IPv6 is not supported on this host"}
end.
ipv4_to_ipv6(doc) -> "Test if IPv4 address is converted to IPv6 address.";
ipv4_to_ipv6(suite) -> [];
ipv4_to_ipv6(Config) when is_list(Config) ->
%% Test what happens if an IPv4 address is looked up in an IPv6 context.
%% If the native resolver succeeds to look it up, an IPv4 compatible
%% address should be returned. If no IPv6 support on this host, an
%% error should beturned.
?line {_Name,_FullName,IPStr,_IP,Aliases,IP_46_Str,IP_46} =
?config(test_host_ipv4_only, Config),
?line IP4to6Res =
case inet:getaddr(IPStr, inet6) of
{ok,IP_46} ->
io:format("IPv4->IPv6: success~n"),
true;
E = {error,nxdomain} ->
io:format("IPv4->IPv6: nxdomain~n"),
E;
E = {error,eafnosupport} ->
io:format("IPv6->IPv4: eafnosupport~n"),
E;
Other ->
?line ?t:fail({ipv4_to_ipv6_lookup_failed,Other})
end,
?line case {IP4to6Res,inet:gethostbyname(IPStr, inet6)} of
{true,{ok,HEnt}} ->
?line true = lists:member(native, inet_db:res_option(lookup)),
?line HEnt_ = HEnt#hostent{h_addrtype = inet6,
h_length = 16,
h_addr_list = [IP_46]},
?line HEnt_ = HEnt,
?line check_elems([{HEnt#hostent.h_name,[IP_46_Str,IPStr]},
{HEnt#hostent.h_aliases,[[],Aliases]}]);
{_,IP4to6Res} -> ok
end,
ok.
host_and_addr(doc) -> ["Test looking up hosts and addresses. Use 'ypcat hosts' ",
"or the local eqivalent to find all hosts."];
host_and_addr(suite) -> [];
host_and_addr(Config) when is_list(Config) ->
?line Dog = test_server:timetrap(test_server:minutes(5)),
?line lists:foreach(fun try_host/1, get_hosts(Config)),
?line test_server:timetrap_cancel(Dog),
ok.
try_host({Ip0, Host}) ->
?line {ok,Ip} = inet:getaddr(Ip0, inet),
?line {ok,{hostent, _, _, inet, _, Ips1}} = inet:gethostbyaddr(Ip),
?line {ok,{hostent, _, _, inet, _, _Ips2}} = inet:gethostbyname(Host),
?line true = lists:member(Ip, Ips1),
ok.
%% Get all hosts from the system using 'ypcat hosts' or the local
%% equvivalent.
get_hosts(Config) ->
case os:type() of
{unix, _} ->
List = lists:map(fun(X) ->
atom_to_list(X)++" "
end, ?config(test_hosts, Config)),
Cmd = "ypmatch "++List++" hosts.byname",
HostFile = os:cmd(Cmd),
get_hosts(HostFile, [], [], []);
_ ->
?config(hardcoded_hosts, Config)
end.
get_ipv6_hosts(Config) ->
case os:type() of
{unix, _} ->
List = lists:map(fun(X) ->
atom_to_list(X)++" "
end, ?config(test_hosts, Config)),
Cmd = "ypmatch "++List++" ipnodes.byname",
HostFile = os:cmd(Cmd),
get_hosts(HostFile, [], [], []);
_ ->
?config(hardcoded_ipv6_hosts, Config)
end.
get_hosts([$\t|Rest], Cur, Ip, Result) when Ip /= [] ->
get_hosts(Rest, Cur, Ip, Result);
get_hosts([$\t|Rest], Cur, _Ip, Result) ->
get_hosts(Rest, [], lists:reverse(Cur), Result);
get_hosts([$\r|Rest], Cur, Ip, Result) ->
get_hosts(Rest, Cur, Ip, Result);
get_hosts([$\n|Rest], Cur, Ip, Result) ->
[First|_] = string:tokens(lists:reverse(Cur), " "),
Ips = string:tokens(Ip, ","),
Hosts = [{I, First} || I <- Ips],
get_hosts(Rest, [], [], Hosts++Result);
get_hosts([C|Rest], Cur, Ip, Result) ->
get_hosts(Rest, [C|Cur], Ip, Result);
get_hosts([], _, _, Result) ->
Result.
parse(suite) -> [parse_hosts];
parse(doc) -> ["Test that parsing of the hosts file or equivalent works,",
"and that erroneous lines are skipped"].
parse_hosts(Config) when is_list(Config) ->
?line DataDir = ?config(data_dir,Config),
?line HostFile = filename:join(DataDir, "hosts"),
?line inet_parse:hosts(HostFile),
?line HostFileErr1 = filename:join(DataDir, "hosts_err1"),
?line inet_parse:hosts(HostFileErr1),
?line Resolv = filename:join(DataDir,"resolv.conf"),
?line inet_parse:resolv(Resolv),
?line ResolvErr1 = filename:join(DataDir,"resolv.conf.err1"),
?line inet_parse:resolv(ResolvErr1).
t_gethostnative(suite) ->[];
t_gethostnative(doc) ->[];
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
%% OTP-2555
case os:type() of
vxworks ->
{skipped, "VxWorks has no native gethostbyname()"};
_ ->
?line case inet_gethost_native:gethostbyname(
"a23456789012345678901234") of
{error,notfound} ->
?line ok;
{error,no_data} ->
?line ok
end
end.
gethostnative_parallell(suite) ->
[];
gethostnative_parallell(doc) ->
["Check that the emulator survives crashes in gethost_native"];
gethostnative_parallell(Config) when is_list(Config) ->
?line {ok,Hostname} = inet:gethostname(),
?line {ok,_} = inet:gethostbyname(Hostname),
case whereis(inet_gethost_native) of
Pid when is_pid(Pid) ->
?line do_gethostnative_parallell();
_ ->
?line {skipped, "Not running native gethostbyname"}
end.
do_gethostnative_parallell() ->
?line PA = filename:dirname(code:which(?MODULE)),
?line {ok,Node} = ?t:start_node(gethost_parallell, slave,
[{args, "-pa " ++ PA}]),
?line ok = rpc:call(Node, ?MODULE, parallell_gethost, []),
?line receive after 10000 -> ok end,
?line pong = net_adm:ping(Node),
?line ?t:stop_node(Node),
ok.
parallell_gethost() ->
{ok,Hostname} = inet:gethostname(),
process_flag(trap_exit,true),
parallell_gethost_loop(10, Hostname).
parallell_gethost_loop(0, _) -> ok;
parallell_gethost_loop(N, Hostname) ->
case whereis(inet_gethost_native) of
Pid when is_pid(Pid) ->
true = exit(Pid,kill);
_ ->
ok
end,
L = spawn_gethosters(Hostname, 10),
release_gethosters(L),
collect_gethosters(10),
parallell_gethost_loop(N-1, Hostname).
spawn_gethosters(_, 0) ->
[];
spawn_gethosters(Hostname, N) ->
Collector = self(),
[spawn(fun() ->
receive
go ->
case (catch inet:gethostbyname(Hostname)) of
{ok,_} ->
Collector ! ok;
Else ->
Collector ! {error,Else}
end
end
end) |
spawn_gethosters(Hostname, N-1)].
release_gethosters([]) ->
ok;
release_gethosters([H|T]) ->
H ! go,
release_gethosters(T).
collect_gethosters(0) ->
ok;
collect_gethosters(N) ->
receive
ok ->
collect_gethosters(N-1);
Else ->
{failed, {unexpected, Else}}
after 2000 ->
{failed, {missing, N}}
end.
kill_gethost() ->
kill_gethost(20).
kill_gethost(0) ->
ok;
kill_gethost(N) ->
put(kill_gethost_n,N),
Pid = wait_for_gethost(10),
true = exit(Pid,kill),
wait_for_dead_gethost(10),
kill_gethost(N-1).
wait_for_dead_gethost(0) ->
exit({not_dead,inet_gethost_native});
wait_for_dead_gethost(N) ->
case whereis(inet_gethost_native) of
Pid when is_pid(Pid) ->
receive after 1000 ->
ok
end,
wait_for_dead_gethost(N-1);
undefined ->
ok
end.
wait_for_gethost(0) ->
exit(gethost_not_found);
wait_for_gethost(N) ->
{ok,Hostname} = inet:gethostname(),
case (catch inet:gethostbyname(Hostname)) of
{ok,_} ->
ok;
Otherwise ->
%% This is what I call an exit tuple :)
exit({inet,gethostbyname, returned, Otherwise, 'when',
'N','=',N,'and','hostname','=',Hostname,'and',
kill_gethost_n,'=',get(kill_gethost_n)})
end,
case whereis(inet_gethost_native) of
Pid when is_pid(Pid) ->
Pid;
_ ->
receive
after 1000 ->
ok
end,
wait_for_gethost(N-1)
end.
cname_loop(suite) ->
[];
cname_loop(doc) ->
["Check that the resolver handles a CNAME loop"];
cname_loop(Config) when is_list(Config) ->
%% getbyname (hostent_by_domain)
?line ok = inet_db:add_rr("mydomain.com", in, ?S_CNAME, ttl, "mydomain.com"),
?line {error,nxdomain} = inet_db:getbyname("mydomain.com", ?S_A),
?line ok = inet_db:del_rr("mydomain.com", in, ?S_CNAME, "mydomain.com"),
%% res_hostent_by_domain
RR = #dns_rr{domain = "mydomain.com",
class = in,
type = ?S_CNAME,
data = "mydomain.com"},
Rec = #dns_rec{anlist = [RR]},
?line {error,nxdomain} = inet_db:res_hostent_by_domain("mydomain.com", ?S_A, Rec),
ok.
%% These must be run in the whole suite since they need
%% the host list and require inet_gethost_native to be started.
%%
-record(gethostnative_control, {control_seq,
control_interval=100,
lookup_delay=10,
lookup_count=300,
lookup_processes=20}).
gethostnative_soft_restart(suite) ->
[];
gethostnative_soft_restart(doc) ->
["Check that no name lookups fails during soft restart "
"of inet_gethost_native"];
gethostnative_soft_restart(Config) when is_list(Config) ->
?line gethostnative_control(Config,
#gethostnative_control{
control_seq=[soft_restart]}).
gethostnative_debug_level(suite) ->
[];
gethostnative_debug_level(doc) ->
["Check that no name lookups fails during debug level change "
"of inet_gethost_native"];
gethostnative_debug_level(Config) when is_list(Config) ->
?line gethostnative_control(Config,
#gethostnative_control{
control_seq=[{debug_level,1},
{debug_level,0}]}).
gethostnative_control(Config, Optrec) ->
?line case inet_db:res_option(lookup) of
[native] ->
case whereis(inet_gethost_native) of
Pid when is_pid(Pid) ->
?line gethostnative_control_1(Config, Optrec);
_ ->
?line {skipped, "Not running native gethostbyname"}
end;
_ ->
?line {skipped, "Native not only lookup metod"}
end.
gethostnative_control_1(Config,
#gethostnative_control{
control_seq=Seq,
control_interval=Interval,
lookup_delay=Delay,
lookup_count=Cnt,
lookup_processes=N}) ->
?line {ok, Hostname} = inet:gethostname(),
?line {ok, _} = inet:gethostbyname(Hostname),
?line Hosts =
[Hostname|[H || {_,H} <- get_hosts(Config)]
++[H++D || H <- ["www.","www1.","www2.",""],
D <- ["erlang.org","erlang.se"]]
++[H++"cslab.ericsson.net" || H <- ["morgoth.","hades.","styx."]]],
%% Spawn some processes to do parallel lookups while
%% I repeatedly do inet_gethost_native:control/1.
?line TrapExit = process_flag(trap_exit, true),
?line gethostnative_control_2([undefined], Interval, Delay, Cnt, N, Hosts),
?line test_server:format(
"First intermission: now starting control sequence ~w\n",
[Seq]),
?line erlang:display(first_intermission),
?line gethostnative_control_2(Seq, Interval, Delay, Cnt, N, Hosts),
?line erlang:display(second_intermission),
?line test_server:format(
"Second intermission: now stopping control sequence ~w\n",
[Seq]),
?line gethostnative_control_2([undefined], Interval, Delay, Cnt, N, Hosts),
?line true = process_flag(trap_exit, TrapExit),
?line ok.
gethostnative_control_2(Seq, Interval, Delay, Cnt, N, Hosts) ->
?line Tag = make_ref(),
?line Parent = self(),
?line Lookupers =
[spawn_link(
fun () ->
random:seed(),
lookup_loop(Hosts, Delay, Tag, Parent, Cnt, Hosts)
end)
|| _ <- lists:seq(1, N)],
control_loop(Seq, Interval, Tag, Lookupers, Seq),
gethostnative_control_3(Tag, ok).
gethostnative_control_3(Tag, Reason) ->
receive
{Tag,Error} ->
?line gethostnative_control_3(Tag, Error)
after 0 ->
Reason
end.
control_loop([], _Interval, _Tag, [], _Seq) ->
ok;
control_loop([], Interval, Tag, Lookupers, Seq) ->
control_loop(Seq, Interval, Tag, Lookupers, Seq);
control_loop([Op|Ops], Interval, Tag, Lookupers, Seq) ->
control_loop(Ops, Interval, Tag,
control_loop_1(Op, Interval, Tag, Lookupers),
Seq).
control_loop_1(Op, Interval, Tag, Lookupers) ->
?line
receive
{'EXIT',Pid,Reason} ->
?line case Reason of
Tag -> % Done
?line control_loop_1
(Op, Interval, Tag,
lists:delete(Pid, Lookupers));
_ ->
?line io:format("Lookuper ~p died: ~p",
[Pid,Reason]),
?line test_server:fail("Lookuper died")
end
after Interval ->
?line if Op =/= undefined ->
?line ok = inet_gethost_native:control(Op);
true ->
?line ok
end,
?line Lookupers
end.
lookup_loop(_, _Delay, Tag, _Parent, 0, _Hosts) ->
exit(Tag);
lookup_loop([], Delay, Tag, Parent, Cnt, Hosts) ->
lookup_loop(Hosts, Delay, Tag, Parent, Cnt, Hosts);
lookup_loop([H|Hs], Delay, Tag, Parent, Cnt, Hosts) ->
case inet:gethostbyname(H) of
{ok,_Hent} -> ok;
{error,nxdomain} -> ok;
Error ->
?line io:format("Name lookup error for ~p for ~p: ~p",
[self(),H,Error]),
Parent ! {Tag,Error}
end,
receive
after random:uniform(Delay) ->
lookup_loop(Hs, Delay, Tag, Parent, Cnt-1, Hosts)
end.
getif(suite) ->
[];
getif(doc) ->
["Tests basic functionality of getiflist, getif, and ifget"];
getif(Config) when is_list(Config) ->
?line {ok,Hostname} = inet:gethostname(),
?line {ok,Address} = inet:getaddr(Hostname, inet),
?line {ok,Loopback} = inet:getaddr("localhost", inet),
?line {ok,Interfaces} = inet:getiflist(),
?line Addresses =
lists:sort(
lists:foldl(
fun (I, Acc) ->
case inet:ifget(I, [addr]) of
{ok,[{addr,A}]} -> [A|Acc];
{ok,[]} -> Acc
end
end, [], Interfaces)),
?line {ok,Getif} = inet:getif(),
?line Addresses = lists:sort([A || {A,_,_} <- Getif]),
?line true = ip_member(Address, Addresses),
?line true = ip_member(Loopback, Addresses),
?line ok.
%% Works just like lists:member/2, except that any {127,_,_,_} tuple
%% matches any other {127,_,_,_}. We do this to handle Linux systems
%% that use (for instance) 127.0.1.1 as the IP address for the hostname.
ip_member({127,_,_,_}, [{127,_,_,_}|_]) -> true;
ip_member(K, [K|_]) -> true;
ip_member(K, [_|T]) -> ip_member(K, T);
ip_member(_, []) -> false.
