%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 1997-2017. 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. %% You may obtain a copy of the License at %% %% http://www.apache.org/licenses/LICENSE-2.0 %% %% Unless required by applicable law or agreed to in writing, software %% distributed under the License is distributed on an "AS IS" BASIS, %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %% See the License for the specific language governing permissions and %% limitations under the License. %% %% %CopyrightEnd% %% -module(inet_SUITE). -include_lib("common_test/include/ct.hrl"). -include_lib("kernel/include/inet.hrl"). -include_lib("kernel/src/inet_dns.hrl"). -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, init_per_group/2,end_per_group/2, t_gethostbyaddr/0, t_gethostbyaddr/1, t_getaddr/0, t_getaddr/1, t_gethostbyname/0, t_gethostbyname/1, t_gethostbyaddr_v6/0, t_gethostbyaddr_v6/1, t_getaddr_v6/0, t_getaddr_v6/1, t_gethostbyname_v6/0, t_gethostbyname_v6/1, ipv4_to_ipv6/0, ipv4_to_ipv6/1, host_and_addr/0, host_and_addr/1, t_gethostnative/1, gethostnative_parallell/1, cname_loop/1, gethostnative_soft_restart/0, gethostnative_soft_restart/1, gethostnative_debug_level/0, gethostnative_debug_level/1, 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, 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, kill_gethost/0, parallell_gethost/0, test_netns/0]). -export([init_per_testcase/2, end_per_testcase/2]). suite() -> [{ct_hooks,[ts_install_cth]}, {timetrap,{minutes,1}}]. all() -> [t_gethostbyaddr, t_gethostbyname, t_getaddr, t_gethostbyaddr_v6, t_gethostbyname_v6, t_getaddr_v6, ipv4_to_ipv6, host_and_addr, {group, parse}, t_gethostnative, gethostnative_parallell, cname_loop, gethostnative_debug_level, gethostnative_soft_restart, lookup_bad_search_option, getif, getif_ifr_name_overflow, getservbyname_overflow, getifaddrs, parse_strict_address, simple_netns, simple_netns_open, simple_bind_to_device, simple_bind_to_device_open]. groups() -> [{parse, [], [parse_hosts, parse_address]}]. %% Required configuaration required(v4) -> [{require, test_host_ipv4_only}, {require, test_dummy_host}]; required(v6) -> [{require, test_host_ipv6_only}, {require, test_dummy_ipv6_host}]; required(hosts) -> case os:type() of {OS, _} when OS =:= win32 -> [{require, hardcoded_hosts}, {require, hardcoded_ipv6_hosts}]; _Else -> [{require, test_hosts}] end. init_per_suite(Config) -> Config. end_per_suite(_Config) -> ok. init_per_group(_GroupName, Config) -> Config. end_per_group(_GroupName, Config) -> Config. init_per_testcase(lookup_bad_search_option, Config) -> Db = inet_db, Key = res_lookup, %% The bad option can not enter through inet_db:set_lookup/1, %% but through e.g .inetrc. Prev = ets:lookup(Db, Key), ets:delete(Db, Key), ets:insert(Db, {Key,[lookup_bad_search_option]}), io:format("Misconfigured resolver lookup order", []), [{Key,Prev}|Config]; init_per_testcase(_Func, Config) -> Config. end_per_testcase(lookup_bad_search_option, Config) -> Db = inet_db, Key = res_lookup, Prev = proplists:get_value(Key, Config), ets:delete(Db, Key), ets:insert(Db, Prev), io:format("Restored resolver lookup order", []); end_per_testcase(_Func, _Config) -> ok. t_gethostbyaddr() -> required(v4). %% Test the inet:gethostbyaddr/1 function. t_gethostbyaddr(Config) when is_list(Config) -> {Name,FullName,IPStr,{A,B,C,D}=IP,Aliases,_,_} = ct:get_config(test_host_ipv4_only), Rname = integer_to_list(D) ++ "." ++ integer_to_list(C) ++ "." ++ integer_to_list(B) ++ "." ++ integer_to_list(A) ++ ".in-addr.arpa", {ok,HEnt} = inet:gethostbyaddr(IPStr), {ok,HEnt} = inet:gethostbyaddr(IP), {error,Error} = inet:gethostbyaddr(Name), ok = io:format("Failure reason: ~p: ~s", [error,inet:format_error(Error)]), HEnt_ = HEnt#hostent{h_addrtype = inet, h_length = 4, h_addr_list = [IP]}, 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. check_elems([{HEnt#hostent.h_name,[Name,FullName]}]), io:format("Buggy alias list: ~p", [HEnt#hostent.h_aliases]), ok; _ -> io:format("alias list: ~p", [HEnt#hostent.h_aliases]), io:format( "check alias list: ~p", [[Aliases,tl(Aliases),[Rname]]]), io:format("name: ~p", [HEnt#hostent.h_name]), io:format("check name: ~p", [[Name,FullName]]), check_elems( [{HEnt#hostent.h_name,[Name,FullName]}, {HEnt#hostent.h_aliases,[[],Aliases,tl(Aliases),[Rname]]}]) end, {_DName, _DFullName, DIPStr, DIP, _, _, _} = ct:get_config(test_dummy_host), {error,nxdomain} = inet:gethostbyaddr(DIPStr), {error,nxdomain} = inet:gethostbyaddr(DIP), ok. t_gethostbyaddr_v6() -> required(v6). %% Test the inet:gethostbyaddr/1 inet6 function. t_gethostbyaddr_v6(Config) when is_list(Config) -> {Name6, FullName6, IPStr6, IP6, Aliases6} = ct:get_config(test_host_ipv6_only), 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} -> {ok,HEnt6} = inet:gethostbyaddr(IP6), {error,Error6} = inet:gethostbyaddr(Name6), ok = io:format("Failure reason: ~p: ~s", [Error6, inet:format_error(Error6)]), HEnt6_ = HEnt6#hostent{h_addrtype = inet6, h_length = 16, h_addr_list = [IP6]}, HEnt6_ = HEnt6, check_elems( [{HEnt6#hostent.h_name,[Name6,FullName6]}, {HEnt6#hostent.h_aliases,[[],Aliases6,tl(Aliases6)]}]), {_DName6, _DFullName6, DIPStr6, DIP6, _} = ct:get_config(test_dummy_ipv6_host), {error,nxdomain} = inet:gethostbyaddr(DIPStr6), {error,nxdomain} = inet:gethostbyaddr(DIP6), ok end. t_gethostbyname() -> required(v4). %% Test the inet:gethostbyname/1 function. t_gethostbyname(Config) when is_list(Config) -> {Name,FullName,IPStr,IP,Aliases,IP_46_Str,_} = ct:get_config(test_host_ipv4_only), {ok,_} = inet:gethostbyname(IPStr), {ok,HEnt} = inet:gethostbyname(Name), {ok,HEnt} = inet:gethostbyname(list_to_atom(Name)), HEnt_ = HEnt#hostent{h_addrtype = inet, h_length = 4, h_addr_list = [IP]}, HEnt_ = HEnt, check_elems([{HEnt#hostent.h_name,[Name,FullName]}, {HEnt#hostent.h_aliases,[[],Aliases,tl(Aliases)]}]), {ok,HEntF} = inet:gethostbyname(FullName), HEntF_ = HEntF#hostent{h_name = FullName, h_addrtype = inet, h_length = 4, h_addr_list = [IP]}, HEntF_ = HEntF, check_elems([{HEnt#hostent.h_aliases,[[],Aliases,tl(Aliases)]}]), %% FullNameU = toupper(FullName), {ok,HEntU} = inet:gethostbyname(FullNameU), FullNameU = toupper(HEntU#hostent.h_name), #hostent{ h_addrtype = inet, h_length = 4, h_addr_list = [IP]} = HEntU, check_elems( [{[toupper(H) || H <- HEntU#hostent.h_aliases], [[],[toupper(A) || A <- Aliases]]}]), {DName, _DFullName, _DIPStr, _DIP, _, _, _} = ct:get_config(test_dummy_host), {error,nxdomain} = inet:gethostbyname(DName), {error,nxdomain} = inet:gethostbyname(IP_46_Str), ok. t_gethostbyname_v6() -> required(v6). %% Test the inet:gethostbyname/1 inet6 function. t_gethostbyname_v6(Config) when is_list(Config) -> {Name, FullName, IPStr, IP, Aliases} = ct:get_config(test_host_ipv6_only), case inet:gethostbyname(Name, inet6) of {ok,HEnt} -> {ok,_} = inet:gethostbyname(IPStr, inet6), {ok,HEnt} = inet:gethostbyname(list_to_atom(Name), inet6), case HEnt#hostent.h_addr_list of [IP] -> % IPv6 address #hostent{h_addrtype = inet6, h_length = 16} = HEnt, check_elems( [{HEnt#hostent.h_name,[Name,FullName]}, {HEnt#hostent.h_aliases,[[],Aliases,tl(Aliases)]}]); [IP46] -> % IPv4 compatible address {ok,HEnt4} = inet:gethostbyname(Name, inet), #hostent{h_addrtype = inet, h_length = 4, h_addr_list = [IP4]} = HEnt4, {ok,IP46} = inet_parse:ipv6_address( "::ffff:" ++ inet:ntoa(IP4)), check_elems( [{HEnt#hostent.h_name,[Name,FullName]}]) end, {ok,HEntF} = inet:gethostbyname(FullName, inet6), case HEntF#hostent.h_addr_list of [IP] -> % IPv6 address #hostent{h_name = FullName, h_addrtype = inet6, h_length = 16} = HEntF, check_elems( [{HEnt#hostent.h_aliases,[[],Aliases,tl(Aliases)]}]); [IP46F] -> % IPv4 compatible address {ok,HEnt4F} = inet:gethostbyname(FullName, inet), #hostent{h_addrtype = inet, h_length = 4, h_addr_list = [IP4F]} = HEnt4F, {ok,IP46F} = inet_parse:ipv6_address( "::ffff:" ++ inet:ntoa(IP4F)), check_elems( [{HEntF#hostent.h_name,[Name,FullName]}]) end; _ -> {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) -> ct:fail({no_match,Val,Tests0}). t_getaddr() -> required(v4). %% Test the inet:getaddr/2 function. t_getaddr(Config) when is_list(Config) -> {Name,FullName,IPStr,IP,_,IP_46_Str,IP46} = ct:get_config(test_host_ipv4_only), {ok,IP} = inet:getaddr(list_to_atom(Name), inet), {ok,IP} = inet:getaddr(Name, inet), {ok,IP} = inet:getaddr(FullName, inet), {ok,IP} = inet:getaddr(IP, inet), {ok,IP} = inet:getaddr(IPStr, inet), {error,nxdomain} = inet:getaddr(IP_46_Str, inet), {error,eafnosupport} = inet:getaddr(IP46, inet), {DName, DFullName, DIPStr, DIP, _, _, _} = ct:get_config(test_dummy_host), {error,nxdomain} = inet:getaddr(DName, inet), {error,nxdomain} = inet:getaddr(DFullName, inet), {ok,DIP} = inet:getaddr(DIPStr, inet), {ok,DIP} = inet:getaddr(DIP, inet), ok. t_getaddr_v6() -> required(v4) ++ required(v6). %% Test the inet:getaddr/2 function. t_getaddr_v6(Config) when is_list(Config) -> {Name,FullName,IPStr,IP,_} = ct:get_config(test_host_ipv6_only), case inet:getaddr(Name, inet6) of {ok,Addr} -> IP = Addr, {ok,IP} = inet:getaddr(toupper(Name), inet6), {ok,IP} = inet:getaddr(list_to_atom(Name), inet6), {ok,IP} = inet:getaddr(list_to_atom(toupper(Name)), inet6), {ok,IP} = inet:getaddr(FullName, inet6), {ok,IP} = inet:getaddr(toupper(FullName), inet6), {ok,IP} = inet:getaddr(IP, inet6), {ok,IP} = inet:getaddr(IPStr, inet6), %% {DName,DFullName,DIPStr,DIP,_} = ct:get_config(test_dummy_ipv6_host), {error,nxdomain} = inet:getaddr(DName, inet6), {error,nxdomain} = inet:getaddr(DFullName, inet6), {ok,DIP} = inet:getaddr(DIPStr, inet6), {ok,DIP} = inet:getaddr(DIP, inet6), ok; _ -> {skip, "IPv6 is not supported on this host"} end. ipv4_to_ipv6() -> required(v4). %% Test if IPv4 address is converted to IPv6 address. 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. {_Name,_FullName,IPStr,_IP,Aliases,IP_46_Str,IP_46} = ct:get_config(test_host_ipv4_only), 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 -> ct:fail({ipv4_to_ipv6_lookup_failed,Other}) end, case {IP4to6Res,inet:gethostbyname(IPStr, inet6)} of {true,{ok,HEnt}} -> HEnt_ = HEnt#hostent{h_addrtype = inet6, h_length = 16, h_addr_list = [IP_46]}, HEnt_ = HEnt, check_elems([{HEnt#hostent.h_name,[IP_46_Str,IPStr]}, {HEnt#hostent.h_aliases,[[],Aliases,tl(Aliases)]}]); {_,IP4to6Res} -> ok end, ok. host_and_addr() -> [{timetrap,{minutes,5}}|required(hosts)]. %% Test looking up hosts and addresses. Use 'ypcat hosts' %% or the local eqivalent to find all hosts. host_and_addr(Config) when is_list(Config) -> lists:foreach(fun try_host/1, get_hosts(Config)), ok. try_host({Ip0, Host}) -> {ok,Ip} = inet:getaddr(Ip0, inet), {ok,{hostent, _, _, inet, _, Ips1}} = inet:gethostbyaddr(Ip), {ok,{hostent, _, _, inet, _, _Ips2}} = inet:gethostbyname(Host), 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, ct:get_config(test_hosts)), Cmd = "ypmatch "++List++" hosts.byname", HostFile = os:cmd(Cmd), get_hosts(HostFile, [], [], []); _ -> ct:get_config(hardcoded_hosts) end. get_ipv6_hosts(_Config) -> case os:type() of {unix, _} -> List = lists:map(fun(X) -> atom_to_list(X)++" " end, ct:get_config(ipv6_hosts)), Cmd = "ypmatch "++List++" ipnodes.byname", HostFile = os:cmd(Cmd), get_hosts(HostFile, [], [], []); _ -> ct:get_config(hardcoded_ipv6_hosts) 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_hosts(Config) when is_list(Config) -> DataDir = proplists:get_value(data_dir,Config), HostFile = filename:join(DataDir, "hosts"), inet_parse:hosts(HostFile), HostFileErr1 = filename:join(DataDir, "hosts_err1"), inet_parse:hosts(HostFileErr1), Resolv = filename:join(DataDir,"resolv.conf"), inet_parse:resolv(Resolv), ResolvErr1 = filename:join(DataDir,"resolv.conf.err1"), inet_parse:resolv(ResolvErr1). parse_address(Config) when is_list(Config) -> V4Reversable = [{{0,0,0,0},"0.0.0.0"}, {{1,2,3,4},"1.2.3.4"}, {{253,252,251,250},"253.252.251.250"}, {{1,2,255,254},"1.2.255.254"}], V6Reversable = [{{0,0,0,0,0,0,0,0},"::"}, {{0,0,0,0,0,0,0,1},"::1"}, {{0,0,0,0,0,0,0,2},"::0.0.0.2"}, {{15,0,0,0,0,0,0,2},"f::2"}, {{15,16#f11,0,0,0,0,256,2},"f:f11::100:2"}, {{16#700,0,0,0,0,0,0,0},"700::"}, {{0,0,0,0,0,0,2,1},"::0.2.0.1"}, {{0,0,0,0,0,3,2,1},"::3:2:1"}, {{0,0,0,0,4,3,2,1},"::4:3:2:1"}, {{0,0,0,5,4,3,2,1},"::5:4:3:2:1"}, {{0,0,6,5,4,3,2,1},"::6:5:4:3:2:1"}, {{0,7,6,5,4,3,2,1},"0:7:6:5:4:3:2:1"}, {{7,0,0,0,0,0,0,0},"7::"}, {{7,6,0,0,0,0,0,0},"7:6::"}, {{7,6,5,0,0,0,0,0},"7:6:5::"}, {{7,6,5,4,0,0,0,0},"7:6:5:4::"}, {{7,6,5,4,3,0,0,0},"7:6:5:4:3::"}, {{7,6,5,4,3,2,0,0},"7:6:5:4:3:2::"}, {{7,6,5,4,3,2,1,0},"7:6:5:4:3:2:1:0"}, {{0,0,6,5,4,3,0,0},"::6:5:4:3:0:0"}, {{0,0,6,5,4,0,0,0},"0:0:6:5:4::"}, {{8,0,0,5,4,0,0,1},"8::5:4:0:0:1"}, {{8,0,0,5,0,0,0,1},"8:0:0:5::1"}, {{0,7,6,5,4,3,2,0},"0:7:6:5:4:3:2:0"}, {{0,0,6,5,4,3,0,0},"::6:5:4:3:0:0"}, {{0,0,0,5,4,0,0,0},"::5:4:0:0:0"}, {{0,0,0,0,4,0,0,0},"::4:0:0:0"}, {{0,0,0,5,0,0,0,0},"0:0:0:5::"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,16#c66c,16#77,16#88}, "c11:c22:5c33:c440:55c0:c66c:77:88"}, {{0,16#c22,16#5c33,16#c440,16#55c0,16#c66c,16#77,16#88}, "0:c22:5c33:c440:55c0:c66c:77:88"}, {{16#c11,0,16#5c33,16#c440,16#55c0,16#c66c,16#77,16#88}, "c11:0:5c33:c440:55c0:c66c:77:88"}, {{16#c11,16#c22,0,16#c440,16#55c0,16#c66c,16#77,16#88}, "c11:c22:0:c440:55c0:c66c:77:88"}, {{16#c11,16#c22,16#5c33,0,16#55c0,16#c66c,16#77,16#88}, "c11:c22:5c33:0:55c0:c66c:77:88"}, {{16#c11,16#c22,16#5c33,16#c440,0,16#c66c,16#77,16#88}, "c11:c22:5c33:c440:0:c66c:77:88"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,0,16#77,16#88}, "c11:c22:5c33:c440:55c0:0:77:88"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,16#c66c,0,16#88}, "c11:c22:5c33:c440:55c0:c66c:0:88"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,16#c66c,16#77,0}, "c11:c22:5c33:c440:55c0:c66c:77:0"}, {{0,0,16#5c33,16#c440,16#55c0,16#c66c,16#77,16#88}, "::5c33:c440:55c0:c66c:77:88"}, {{16#c11,0,0,16#c440,16#55c0,16#c66c,16#77,16#88}, "c11::c440:55c0:c66c:77:88"}, {{16#c11,16#c22,0,0,16#55c0,16#c66c,16#77,16#88}, "c11:c22::55c0:c66c:77:88"}, {{16#c11,16#c22,16#5c33,0,0,16#c66c,16#77,16#88}, "c11:c22:5c33::c66c:77:88"}, {{16#c11,16#c22,16#5c33,16#c440,0,0,16#77,16#88}, "c11:c22:5c33:c440::77:88"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,0,0,16#88}, "c11:c22:5c33:c440:55c0::88"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,16#c66c,0,0}, "c11:c22:5c33:c440:55c0:c66c::"}, {{0,0,0,16#c440,16#55c0,16#c66c,16#77,16#88}, "::c440:55c0:c66c:77:88"}, {{16#c11,0,0,0,16#55c0,16#c66c,16#77,16#88}, "c11::55c0:c66c:77:88"}, {{16#c11,16#c22,0,0,0,16#c66c,16#77,16#88}, "c11:c22::c66c:77:88"}, {{16#c11,16#c22,16#5c33,0,0,0,16#77,16#88}, "c11:c22:5c33::77:88"}, {{16#c11,16#c22,16#5c33,16#c440,0,0,0,16#88}, "c11:c22:5c33:c440::88"}, {{16#c11,16#c22,16#5c33,16#c440,16#55c0,0,0,0}, "c11:c22:5c33:c440:55c0::"}, {{0,0,0,0,16#55c0,16#c66c,16#77,16#88}, "::55c0:c66c:77:88"}, {{16#c11,0,0,0,0,16#c66c,16#77,16#88}, "c11::c66c:77:88"}, {{16#c11,16#c22,0,0,0,0,16#77,16#88}, "c11:c22::77:88"}, {{16#c11,16#c22,16#5c33,0,0,0,0,16#88}, "c11:c22:5c33::88"}, {{16#c11,16#c22,16#5c33,16#c440,0,0,0,0}, "c11:c22:5c33:c440::"}, {{0,0,0,0,0,16#c66c,16#77,16#88}, "::c66c:77:88"}, {{16#c11,0,0,0,0,0,16#77,16#88}, "c11::77:88"}, {{16#c11,16#c22,0,0,0,0,0,16#88}, "c11:c22::88"}, {{16#c11,16#c22,16#5c33,0,0,0,0,0}, "c11:c22:5c33::"}, {{0,0,0,0,0,65535,258,65534},"::ffff:1.2.255.254"}, {{16#fe80,12345,0,0,0,0,0,16#12},"fe80::12%012345"}, {{16#ffff,16#ffff,16#ffff,16#ffff,16#ffff,16#ffff,16#ffff,16#ffff}, "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"} |[{list_to_tuple(P++[(D1 bsl 8) bor D2,(D3 bsl 8) bor D4]), Q++S} || {{D1,D2,D3,D4},S} <- tl(V4Reversable), {P,Q} <- [{[0,0,0,0,0,16#ffff],"::ffff:"}, {[0,0,0,0,0,0],"::"}]]], V4Sloppy = [{{10,1,16#98,16#76},"10.0x019876"}, {{8#12,1,8#130,8#321},"012.01.054321"}, {{252,253,254,255},"252.253.254.0377"}, {{252,253,254,255},"0Xfc.000000000375.0x0000fe.255"}, {{252,253,254,255},"252.253.65279"}, {{252,253,254,255},"252.0xFD.0177377"}, {{252,253,254,255},"252.16645887"}, {{252,253,254,255},"00374.0XFDFEFF"}, {{252,253,254,255},"4244504319"}, {{252,253,254,255},"0xfcfdfeff"}, {{252,253,254,255},"00000000000037477377377"}, {{16#12,16#34,16#56,16#78},"0x12345678"}, {{16#12,16#34,16#56,16#78},"0x12.0x345678"}, {{16#12,16#34,16#56,16#78},"0x12.0X34.0x5678"}, {{16#12,16#34,16#56,16#78},"0x12.0X34.0x56.0X78"}, {{0,0,0,0},"0"}, {{0,0,0,0},"00"}, {{0,0,0,0},"0.0"}, {{0,0,0,0},"00.00.00"}, {{0,0,0,0},"0.00.0.0"}, {{0,0,0,0},"0.0.000000000000.0"}], V6Sloppy = [{{16#a,16#b,16#c,16#0,16#0,16#d,16#e,16#f},"A:B:C::d:e:f"}, {{16#fe80,0,0,0,0,0,0,16#12},"fe80::12%XXXXXXX"}] ++ [{{P,0,0,0,0,D2,(D1 bsl 8) bor D2,(D3 bsl 8) bor D4}, Q++erlang:integer_to_list(D2, 16)++":"++S} || {{D1,D2,D3,D4},S} <- V4Reversable, {P,Q} <- [{16#2001,"2001::"},{16#177,"177::"},{16#ff0,"Ff0::"}]], V4Err = ["0.256.0.1", "1.2.3.4.5", "256.255.65535", "4294967296", "0x100000000", "040000000000", "1.2.3.-4", "1.2.-3.4", "1.-2.3.4", "-1.2.3.4", "10.", "172.16.", "198.168.0.", "127.0.0.1."], V6Err = [":::", "f:::2", "::-1", "::g", "f:f11::10100:2", "f:f11::01100:2", "::17000", "::01700", "10000::", "01000::", "::8:7:6:5:4:3:2:1", "8:7:6:5:4:3:2:1::", "8:7:6:5:4::3:2:1", "::1.2.3.4.5", "::1.2.3.04", "::1.256.3.4", "::-5.4.3.2", "::5.-4.3.2", "::5.4.-3.2", "::5.4.3.-2", "::FFFF:1.2.3.4.5", "::10.", "::FFFF:172.16.", "fe80::198.168.0.", "fec0::fFfF:127.0.0.1."], t_parse_address (parse_ipv6_address, false, V6Reversable++V6Sloppy++V6Err++V4Err), t_parse_address (parse_ipv6strict_address, true, V6Reversable++V6Err++V4Err), t_parse_address (parse_ipv4_address, false, V4Reversable++V4Sloppy++V4Err++V6Err++[S || {_,S} <- V6Reversable]), t_parse_address (parse_ipv4strict_address, true, V4Reversable++V4Err++V6Err++[S || {_,S} <- V4Sloppy++V6Reversable]). t_parse_address(Func, _Reversable, []) -> io:format("~p done.~n", [Func]), ok; t_parse_address(Func, Reversable, [{Addr,String}|L]) -> io:format("~p = ~p.~n", [Addr,String]), {ok,Addr} = inet:Func(String), case Reversable of true ->String = inet:ntoa(Addr); false -> ok end, t_parse_address(Func, Reversable, L); t_parse_address(Func, Reversable, [String|L]) -> io:format("~p.~n", [String]), {error,einval} = inet:Func(String), t_parse_address(Func, Reversable, L). parse_strict_address(Config) when is_list(Config) -> {ok, {127,0,0,1}} = inet:parse_strict_address("127.0.0.1"), {ok, {3089,3106,23603,50240,21952,50796,119,136}} = inet:parse_strict_address("c11:0c22:5c33:c440:55c0:c66c:77:0088"), {ok, {3089,3106,23603,50240,0,0,119,136}} = inet:parse_strict_address("c11:0c22:5c33:c440::077:0088"). 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 inet_gethost_native:gethostbyname( "a23456789012345678901234") of {error,notfound} -> ok; {error,no_data} -> ok end. %% Check that the emulator survives crashes in gethost_native. gethostnative_parallell(Config) when is_list(Config) -> {ok,Hostname} = inet:gethostname(), {ok,_} = inet:gethostbyname(Hostname), case whereis(inet_gethost_native) of Pid when is_pid(Pid) -> do_gethostnative_parallell(); _ -> {skipped, "Not running native gethostbyname"} end. do_gethostnative_parallell() -> PA = filename:dirname(code:which(?MODULE)), {ok,Node} = test_server:start_node(gethost_parallell, slave, [{args, "-pa " ++ PA}]), ok = rpc:call(Node, ?MODULE, parallell_gethost, []), receive after 10000 -> ok end, pong = net_adm:ping(Node), test_server: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. %% Check that the resolver handles a CNAME loop. cname_loop(Config) when is_list(Config) -> %% getbyname (hostent_by_domain) ok = inet_db:add_rr("mydomain.com", in, ?S_CNAME, ttl, "mydomain.com"), {error,nxdomain} = inet_db:getbyname("mydomain.com", ?S_A), 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]}, {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() -> required(hosts). %% Check that no name lookups fails during soft restart %% of inet_gethost_native. gethostnative_soft_restart(Config) when is_list(Config) -> gethostnative_control(Config, #gethostnative_control{ control_seq=[soft_restart]}). gethostnative_debug_level() -> required(hosts). %% Check that no name lookups fails during debug level change %% of inet_gethost_native. gethostnative_debug_level(Config) when is_list(Config) -> gethostnative_control(Config, #gethostnative_control{ control_seq=[{debug_level,1}, {debug_level,0}]}). gethostnative_control(Config, Optrec) -> case inet_db:res_option(lookup) of [native] -> case whereis(inet_gethost_native) of Pid when is_pid(Pid) -> gethostnative_control_1(Config, Optrec); _ -> {skipped, "Not running native gethostbyname"} end; _ -> {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}) -> {ok, Hostname} = inet:gethostname(), {ok, _} = inet:gethostbyname(Hostname), 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. TrapExit = process_flag(trap_exit, true), gethostnative_control_2([undefined], Interval, Delay, Cnt, N, Hosts), io:format( "First intermission: now starting control sequence ~w\n", [Seq]), erlang:display(first_intermission), gethostnative_control_2(Seq, Interval, Delay, Cnt, N, Hosts), erlang:display(second_intermission), io:format( "Second intermission: now stopping control sequence ~w\n", [Seq]), gethostnative_control_2([undefined], Interval, Delay, Cnt, N, Hosts), true = process_flag(trap_exit, TrapExit), ok. gethostnative_control_2(Seq, Interval, Delay, Cnt, N, Hosts) -> Tag = make_ref(), Parent = self(), Lookupers = [spawn_link( fun () -> 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} -> 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) -> receive {'EXIT',Pid,Reason} -> case Reason of Tag -> % Done control_loop_1 (Op, Interval, Tag, lists:delete(Pid, Lookupers)); _ -> io:format("Lookuper ~p died: ~p", [Pid,Reason]), ct:fail("Lookuper died") end after Interval -> if Op =/= undefined -> ok = inet_gethost_native:control(Op); true -> ok end, 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 -> io:format("Name lookup error for ~p for ~p: ~p", [self(),H,Error]), Parent ! {Tag,Error} end, receive after rand:uniform(Delay) -> lookup_loop(Hs, Delay, Tag, Parent, Cnt-1, Hosts) end. %% Test lookup with erroneously configured lookup option (OTP-12133). lookup_bad_search_option(Config) when is_list(Config) -> %% Manipulation of resolver config is done in init_per_testcase %% and end_per_testcase to ensure cleanup. {ok,Hostname} = inet:gethostname(), {ok,_Hent} = inet:gethostbyname(Hostname), % Will hang loop for this bug ok. %% Tests basic functionality of getiflist, getif, and ifget. getif(Config) when is_list(Config) -> case os:type() of {unix,Osname} -> do_getif(Osname); {_,_} -> {skip,"inet:getif/0 probably not supported"} end. do_getif(Osname) -> {ok,Hostname} = inet:gethostname(), {ok,Address} = inet:getaddr(Hostname, inet), {ok,Loopback} = inet:getaddr("localhost", inet), {ok,Interfaces} = inet:getiflist(), HWAs = lists:sort( lists:foldl( fun (I, Acc) -> case inet:ifget(I, [hwaddr]) of {ok,[{hwaddr,A}]} -> [A|Acc]; {ok,[]} -> Acc end end, [], Interfaces)), io:format("HWAs = ~p~n", [HWAs]), (Osname =/= sunos) andalso ((length(HWAs) > 0) orelse (ct:fail(no_HWAs))), Addresses = lists:sort( lists:foldl( fun (I, Acc) -> case inet:ifget(I, [addr]) of {ok,[{addr,A}]} -> [A|Acc]; {ok,[]} -> Acc end end, [], Interfaces)), {ok,Getif} = inet:getif(), Addresses = lists:sort([A || {A,_,_} <- Getif]), true = ip_member(Address, Addresses), true = ip_member(Loopback, Addresses), ok. %% Test long interface names do not overrun buffer. getif_ifr_name_overflow(Config) when is_list(Config) -> case os:type() of {unix,Osname} -> do_getif_ifr_name_overflow(Osname); {_,_} -> {skip,"inet:ifget/2 probably not supported"} end. do_getif_ifr_name_overflow(_) -> %% emulator should not crash {ok,[]} = inet:ifget(lists:duplicate(128, "x"), [addr]), ok. %% Test long service names do not overrun buffer. getservbyname_overflow(Config) when is_list(Config) -> %% emulator should not crash {error,einval} = inet:getservbyname(list_to_atom(lists:flatten(lists:duplicate(128, "x"))), tcp), ok. %% Test inet:gifaddrs/0. getifaddrs(Config) when is_list (Config) -> {ok,IfAddrs} = inet:getifaddrs(), io:format("IfAddrs = ~p.~n", [IfAddrs]), case {os:type(), [If || {If,Opts} <- IfAddrs, lists:keymember(hwaddr, 1, Opts)]} of {{unix,sunos},[]} -> ok; {OT,[]} -> ct:fail({should_have_hwaddr,OT}); _ -> ok end, Addrs = [element(1, A) || A <- ifaddrs(IfAddrs)], io:format("Addrs = ~p.~n", [Addrs]), [check_addr(Addr) || Addr <- Addrs], ok. check_addr({addr,Addr}) when tuple_size(Addr) =:= 8, element(1, Addr) band 16#FFC0 =:= 16#FE80 -> io:format("Addr: ~p link local; SKIPPED!~n", [Addr]), ok; check_addr({addr,Addr}) -> io:format("Addr: ~p.~n", [Addr]), Ping = "ping", Pong = "pong", {ok,L} = gen_tcp:listen(0, [{ip,Addr},{active,false}]), {ok,P} = inet:port(L), {ok,S1} = gen_tcp:connect(Addr, P, [{active,false}]), {ok,S2} = gen_tcp:accept(L), ok = gen_tcp:send(S2, Ping), {ok,Ping} = gen_tcp:recv(S1, length(Ping)), ok = gen_tcp:send(S1, Pong), ok = gen_tcp:close(S1), {ok,Pong} = gen_tcp:recv(S2, length(Pong)), ok = gen_tcp:close(S2), ok = gen_tcp:close(L). -record(ifopts, {name,flags,addrs=[],hwaddr}). ifaddrs([]) -> []; ifaddrs([{If,Opts}|IOs]) -> #ifopts{flags=F} = Ifopts = check_ifopts(Opts, #ifopts{name=If}), case F of {flags,Flags} -> case lists:member(running, Flags) of true -> Ifopts#ifopts.addrs; false -> [] end ++ ifaddrs(IOs); undefined -> ifaddrs(IOs) end. check_ifopts([], #ifopts{flags=F,addrs=Raddrs}=Ifopts) -> Addrs = lists:reverse(Raddrs), R = Ifopts#ifopts{addrs=Addrs}, io:format("~p.~n", [R]), %% See how we did... {flags,Flags} = F, case lists:member(broadcast, Flags) of true -> [case A of {{addr,_},{netmask,_},{broadaddr,_}} -> A; {{addr,T},{netmask,_}} when tuple_size(T) =:= 8 -> A end || A <- Addrs]; false -> case lists:member(pointtopoint, Flags) of true -> [case A of {{addr,_},{netmask,_},{dstaddr,_}} -> A end || A <- Addrs]; false -> [case A of {{addr,_},{netmask,_}} -> A end || A <- Addrs] end end, R; check_ifopts([{flags,_}=F|Opts], #ifopts{flags=undefined}=Ifopts) -> check_ifopts(Opts, Ifopts#ifopts{flags=F}); check_ifopts([{flags,_}=F|Opts], #ifopts{flags=Flags}=Ifopts) -> case F of Flags -> check_ifopts(Opts, Ifopts); _ -> ct:fail({multiple_flags,F,Ifopts}) end; check_ifopts( [{addr,_}=A,{netmask,_}=N,{dstaddr,_}=D|Opts], #ifopts{addrs=Addrs}=Ifopts) -> check_ifopts(Opts, Ifopts#ifopts{addrs=[{A,N,D}|Addrs]}); check_ifopts( [{addr,_}=A,{netmask,_}=N,{broadaddr,_}=B|Opts], #ifopts{addrs=Addrs}=Ifopts) -> check_ifopts(Opts, Ifopts#ifopts{addrs=[{A,N,B}|Addrs]}); check_ifopts( [{addr,_}=A,{netmask,_}=N|Opts], #ifopts{addrs=Addrs}=Ifopts) -> check_ifopts(Opts, Ifopts#ifopts{addrs=[{A,N}|Addrs]}); check_ifopts([{addr,_}=A|Opts], #ifopts{addrs=Addrs}=Ifopts) -> check_ifopts(Opts, Ifopts#ifopts{addrs=[{A}|Addrs]}); check_ifopts([{hwaddr,Hwaddr}=H|Opts], #ifopts{hwaddr=undefined}=Ifopts) when is_list(Hwaddr) -> check_ifopts(Opts, Ifopts#ifopts{hwaddr=H}); check_ifopts([{hwaddr,_}=H|_], #ifopts{}=Ifopts) -> ct:fail({multiple_hwaddrs,H,Ifopts}). %% 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. %% Case fold to upper case according to RFC 4343 %% toupper([C|Cs]) when is_integer(C) -> if $a =< C, C =< $z -> [(C - $a + $A)|toupper(Cs)]; true -> [C|toupper(Cs)] end; toupper([]) -> []. simple_netns(Config) when is_list(Config) -> {ok,U} = gen_udp:open(0), case inet:setopts(U, [{netns,""}]) of ok -> jog_netns_opt(U), ok = gen_udp:close(U), %% {ok,L} = gen_tcp:listen(0, []), jog_netns_opt(L), ok = gen_tcp:close(L), %% case gen_sctp:open() of {ok,S} -> jog_netns_opt(S), ok = gen_sctp:close(S); {error,eprotonosupport} -> ok end; {error,einval} -> {skip,"setns() not supported"} end. jog_netns_opt(S) -> %% This is just jogging the option mechanics ok = inet:setopts(S, [{netns,""}]), {ok,[{netns,""}]} = inet:getopts(S, [netns]), ok = inet:setopts(S, [{netns,"/proc/self/ns/net"}]), {ok,[{netns,"/proc/self/ns/net"}]} = inet:getopts(S, [netns]), ok. %% Smoke test netns support. simple_netns_open(Config) when is_list(Config) -> %% Note: {error,enoent} will be returned if the run-time executable %% has support for netns, but /proc/self/ns/net is missing. case gen_udp:open(0, [binary,{netns,"/"},inet]) of {ok,U} -> ok = gen_udp:close(U); {error,E1} when E1 =:= einval; E1 =:= eperm; E1 =:= enoent -> ok end, case gen_tcp:listen(0, [binary,{netns,"/"},inet]) of {ok,T} -> ok = gen_tcp:close(T); {error,E2} when E2 =:= einval; E2 =:= eperm; E2 =:= enoent -> ok end, try gen_sctp:open(0, [binary,{netns,"/"},inet]) of {ok,S} -> ok = gen_sctp:close(S); {error,E3} when E3 =:= einval; E3 =:= eperm; E3 =:= enoent; E3 =:= eprotonosupport -> ok catch error:badarg -> %% Some older platforms does not allow netns for sctp ok end. %% Manual test to be run outside test_server in an emulator %% started by root, in a machine with setns() support... test_netns() -> DefaultIF = v1, DefaultIP = {192,168,1,17}, Namespace = "test", NamespaceIF = v2, NamespaceIP = {192,168,1,18}, %% DefaultIPString = inet_parse:ntoa(DefaultIP), NamespaceIPString = inet_parse:ntoa(NamespaceIP), cmd("ip netns add ~s", [Namespace]), cmd("ip link add name ~w type veth peer name ~w netns ~s", [DefaultIF,NamespaceIF,Namespace]), cmd("ip netns exec ~s ip addr add ~s/30 dev ~w", [Namespace,NamespaceIPString,NamespaceIF]), cmd("ip netns exec ~s ip link set ~w up", [Namespace,NamespaceIF]), cmd("ip addr add ~s/30 dev ~w", [DefaultIPString,DefaultIF]), cmd("ip link set ~w up", [DefaultIF]), try test_netns( {DefaultIF,DefaultIP}, filename:join("/var/run/netns/", Namespace), {NamespaceIF,NamespaceIP}) of Result -> io:put_chars(["#### Test done",io_lib:nl()]), Result after cmd("ip link delete ~w type veth", [DefaultIF]), cmd("ip netns delete ~s", [Namespace]) end. test_netns({DefaultIF,DefaultIP}, Namespace, {NamespaceIF,NamespaceIP}) -> {ok,ListenSocket} = gen_tcp:listen(0, [{active,false}]), {ok,[{addr,DefaultIP}]} = inet:ifget(ListenSocket, DefaultIF, [addr]), {ok,ListenPort} = inet:port(ListenSocket), {ok,ConnectSocket} = gen_tcp:connect( DefaultIP, ListenPort, [{active,false},{netns,Namespace}], 3000), {ok,[{addr,NamespaceIP}]} = inet:ifget(ConnectSocket, NamespaceIF, [addr]), {ok,ConnectPort} = inet:port(ConnectSocket), {ok,AcceptSocket} = gen_tcp:accept(ListenSocket, 0), {ok,AcceptPort} = inet:port(AcceptSocket), {ok,{NamespaceIP,ConnectPort}} = inet:peername(AcceptSocket), {ok,{DefaultIP,AcceptPort}} = inet:peername(ConnectSocket), ok = gen_tcp:send(ConnectSocket, "data"), ok = gen_tcp:close(ConnectSocket), {ok,"data"} = gen_tcp:recv(AcceptSocket, 4, 1000), {error,closed} = gen_tcp:recv(AcceptSocket, 1, 1000), ok = gen_tcp:close(AcceptSocket), ok = gen_tcp:close(ListenSocket). cmd(Cmd, Args) -> cmd(io_lib:format(Cmd, Args)). %% cmd(CmdString) -> io:put_chars(["# ",CmdString,io_lib:nl()]), io:put_chars([os:cmd(CmdString++" ; echo ' =>' $?")]), ok. -define(CAP_NET_RAW, 13). %% from /usr/include/linux/capability.h can_bind_to_device({unix, linux}, {Major, _, _}) when Major > 2 -> Status = os:cmd("cat /proc/self/status | grep CapEff"), [_, CapEffStr] = string:tokens(Status, [$\n, $\t]), CapEff = list_to_integer(CapEffStr, 16), if CapEff band (1 bsl ?CAP_NET_RAW) =/= 0 -> ok; true -> {skip,"insufficient capabilities, CAP_NET_RAW not granted"} end; can_bind_to_device(_OS, _Version) -> {skip,"socket option bind_to_device not supported on this OS or version"}. simple_bind_to_device(Config) when is_list(Config) -> case can_bind_to_device(os:type(), os:version()) of ok -> {ok,U} = gen_udp:open(0), jog_bind_to_device_opt(U), ok = gen_udp:close(U), %% {ok,L} = gen_tcp:listen(0, []), jog_bind_to_device_opt(L), ok = gen_tcp:close(L), %% case gen_sctp:open() of {ok,S} -> jog_bind_to_device_opt(S), ok = gen_sctp:close(S); {error,eprotonosupport} -> ok end; Other -> Other end. %% Smoke test bind_to_device support. simple_bind_to_device_open(Config) when is_list(Config) -> case can_bind_to_device(os:type(), os:version()) of ok -> {ok,U} = gen_udp:open(0, [binary,{bind_to_device,<<"lo">>},inet]), ok = gen_udp:close(U), {ok,T} = gen_tcp:listen(0, [binary,{bind_to_device,<<"lo">>},inet]), ok = gen_tcp:close(T), case gen_sctp:open(0, [binary,{bind_to_device,<<"lo">>},inet]) of {ok,S} -> ok = gen_sctp:close(S); {error,eprotonosupport} -> ok end; Other -> Other end. jog_bind_to_device_opt(S) -> %% This is just jogging the option mechanics ok = inet:setopts(S, [{bind_to_device,<<>>}]), {ok,[{bind_to_device,<<>>}]} = inet:getopts(S, [bind_to_device]), ok = inet:setopts(S, [{bind_to_device,<<"lo">>}]), {ok,[{bind_to_device,<<"lo">>}]} = inet:getopts(S, [bind_to_device]), ok.