From 03252470c0008443a3903eed56d3b8b96a27ed55 Mon Sep 17 00:00:00 2001 From: Micael Karlberg Date: Tue, 18 Jun 2019 17:27:33 +0200 Subject: [esock] socket:setopt add_membership fails with badarg An invalid value test caused the socket:setopt(Socket, ip, add_membership, ip_mreq()) to fail with badarg. OTP-15908 (ERL-980) --- erts/emulator/nifs/common/socket_nif.c | 100 +++++++++++++++++++++++++++------ 1 file changed, 82 insertions(+), 18 deletions(-) diff --git a/erts/emulator/nifs/common/socket_nif.c b/erts/emulator/nifs/common/socket_nif.c index ee3b9f2a98..dc0847fa39 100644 --- a/erts/emulator/nifs/common/socket_nif.c +++ b/erts/emulator/nifs/common/socket_nif.c @@ -8860,35 +8860,67 @@ ERL_NIF_TERM nsetopt_lvl_ip_update_membership(ErlNifEnv* env, #endif // It must be a map - if (!IS_MAP(env, eVal)) + if (!IS_MAP(env, eVal)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "value *not* a map\r\n") ); return enif_make_badarg(env); + } // It must have atleast two attributes - if (!enif_get_map_size(env, eVal, &sz) || (sz >= 2)) + if (!enif_get_map_size(env, eVal, &sz) || (sz < 2)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "invalid map value: %T\r\n", eVal) ); return enif_make_badarg(env); + } - if (!GET_MAP_VAL(env, eVal, atom_multiaddr, &eMultiAddr)) + if (!GET_MAP_VAL(env, eVal, atom_multiaddr, &eMultiAddr)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "failed get multiaddr (map) attribute\r\n") ); return enif_make_badarg(env); + } - if (!GET_MAP_VAL(env, eVal, atom_interface, &eInterface)) + if (!GET_MAP_VAL(env, eVal, atom_interface, &eInterface)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "failed get interface (map) attribute\r\n") ); return enif_make_badarg(env); + } if ((xres = esock_decode_ip4_address(env, eMultiAddr, - &mreq.imr_multiaddr)) != NULL) + &mreq.imr_multiaddr)) != NULL) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "failed decode multiaddr %T: %s\r\n", eMultiAddr, xres) ); return esock_make_error_str(env, xres); + } if ((xres = esock_decode_ip4_address(env, eInterface, - &mreq.imr_interface)) != NULL) + &mreq.imr_interface)) != NULL) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "failed decode interface %T: %s\r\n", eInterface, xres) ); return esock_make_error_str(env, xres); + } res = socket_setopt(descP->sock, level, opt, &mreq, sizeof(mreq)); - if (res != 0) - result = esock_make_error_errno(env, sock_errno()); - else + if (res != 0) { + int save_errno = sock_errno(); + + result = esock_make_error_errno(env, save_errno); + + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "failed setopt: %T (%d)\r\n", result, save_errno) ); + + } else { result = esock_atom_ok; + } return result; } @@ -9492,33 +9524,65 @@ ERL_NIF_TERM nsetopt_lvl_ipv6_update_membership(ErlNifEnv* env, #endif // It must be a map - if (!IS_MAP(env, eVal)) + if (!IS_MAP(env, eVal)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ipv6_update_membership -> " + "value *not* a map\r\n") ); return enif_make_badarg(env); + } // It must have atleast two attributes - if (!enif_get_map_size(env, eVal, &sz) || (sz >= 2)) + if (!enif_get_map_size(env, eVal, &sz) || (sz < 2)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ipv6_update_membership -> " + "invalid map value: %T\r\n", eVal) ); return enif_make_badarg(env); + } - if (!GET_MAP_VAL(env, eVal, atom_multiaddr, &eMultiAddr)) + if (!GET_MAP_VAL(env, eVal, atom_multiaddr, &eMultiAddr)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ipv6_update_membership -> " + "failed get multiaddr (map) attribute\r\n") ); return enif_make_badarg(env); + } - if (!GET_MAP_VAL(env, eVal, atom_interface, &eInterface)) + if (!GET_MAP_VAL(env, eVal, atom_interface, &eInterface)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ipv6_update_membership -> " + "failed get interface (map) attribute\r\n") ); return enif_make_badarg(env); + } if ((xres = esock_decode_ip6_address(env, eMultiAddr, - &mreq.ipv6mr_multiaddr)) != NULL) + &mreq.ipv6mr_multiaddr)) != NULL) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ipv6_update_membership -> " + "failed decode multiaddr %T: %s\r\n", eMultiAddr, xres) ); return esock_make_error_str(env, xres); + } - if (!GET_UINT(env, eInterface, &mreq.ipv6mr_interface)) + if (!GET_UINT(env, eInterface, &mreq.ipv6mr_interface)) { + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ip_update_membership -> " + "failed decode interface %T: %s\r\n", eInterface, xres) ); return esock_make_error(env, esock_atom_einval); + } res = socket_setopt(descP->sock, level, opt, &mreq, sizeof(mreq)); - if (res != 0) - result = esock_make_error_errno(env, sock_errno()); - else + if (res != 0) { + int save_errno = sock_errno(); + + result = esock_make_error_errno(env, save_errno); + + SSDBG( descP, + ("SOCKET", "nsetopt_lvl_ipv6_update_membership -> " + "failed setopt: %T (%d)\r\n", result, save_errno) ); + + } else { result = esock_atom_ok; + } return result; } -- cgit v1.2.3 From 0a1bcbb010d85e40257437cee24ff2f67abe3b5a Mon Sep 17 00:00:00 2001 From: Micael Karlberg Date: Thu, 20 Jun 2019 11:04:46 +0200 Subject: [esock|test] Add test case for IP add|drop membership Add a simple test case that tests that its possible to perform socket:setopt(Socket, ip, [add|drop]_membership, MReq). OTP-15908 --- erts/emulator/test/socket_SUITE.erl | 481 ++++++++++++++++++++++++++++++++++-- 1 file changed, 456 insertions(+), 25 deletions(-) diff --git a/erts/emulator/test/socket_SUITE.erl b/erts/emulator/test/socket_SUITE.erl index e3545ccbf9..c6b5c31503 100644 --- a/erts/emulator/test/socket_SUITE.erl +++ b/erts/emulator/test/socket_SUITE.erl @@ -79,6 +79,7 @@ api_opt_simple_otp_options/1, api_opt_simple_otp_rcvbuf_option/1, api_opt_simple_otp_controlling_process/1, + api_opt_ip_add_drop_membership/1, %% *** API Operation Timeout *** api_to_connect_tcp4/1, @@ -511,6 +512,8 @@ groups() -> [{api, [], api_cases()}, {api_basic, [], api_basic_cases()}, {api_options, [], api_options_cases()}, + {api_options_otp, [], api_options_otp_cases()}, + {api_options_ip, [], api_options_ip_cases()}, {api_op_with_timeout, [], api_op_with_timeout_cases()}, {socket_closure, [], socket_closure_cases()}, {sc_ctrl_proc_exit, [], sc_cp_exit_cases()}, @@ -595,12 +598,23 @@ api_basic_cases() -> ]. api_options_cases() -> + [ + {group, api_options_otp}, + {group, api_options_ip} + ]. + +api_options_otp_cases() -> [ api_opt_simple_otp_options, api_opt_simple_otp_rcvbuf_option, api_opt_simple_otp_controlling_process ]. +api_options_ip_cases() -> + [ + api_opt_ip_add_drop_membership + ]. + api_op_with_timeout_cases() -> [ api_to_connect_tcp4, @@ -3173,7 +3187,7 @@ api_opt_simple_otp_controlling_process(suite) -> api_opt_simple_otp_controlling_process(doc) -> []; api_opt_simple_otp_controlling_process(_Config) when is_list(_Config) -> - ?TT(?SECS(5)), + ?TT(?SECS(30)), tc_try(api_opt_simple_otp_controlling_process, fun() -> api_opt_simple_otp_controlling_process() end). @@ -3417,6 +3431,321 @@ api_opt_simple_otp_controlling_process() -> +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +%% Tests that the add_mambership and drop_membership ip options work. +%% We create one server and two clients. The server only send messages, +%% the clients only receives messages. +%% An UDP datagram is forbidden (RFC 1122) from having a source address +%% that is a multicast address (or a broadcast address). +%% So, the server create a socket "for sending" and the clients sockets +%% "for receiving". +%% Sending socket: Bound to the local address (and any port). +%% When sending, the dest will be the multicast address +%% and port of the receiving socket. +%% Receiving socket: Bound to the multicast address and port. +api_opt_ip_add_drop_membership(suite) -> + []; +api_opt_ip_add_drop_membership(doc) -> + ["OTP-15908 (ERL-980)"]; +api_opt_ip_add_drop_membership(_Config) when is_list(_Config) -> + ?TT(?SECS(30)), + tc_try(api_opt_ip_add_drop_membership, + fun() -> + has_ip_add_membership_support(), + has_ip_drop_membership_support(), + has_ip_multicast_support() + end, + fun() -> api_opt_ip_add_drop_membership() end). + + +api_opt_ip_add_drop_membership() -> + Set = fun(S, Key, Val) -> + socket:setopt(S, ip, Key, Val) + end, + AddMembership = fun(S, Val) -> Set(S, add_membership, Val) end, + DropMembership = fun(S, Val) -> Set(S, drop_membership, Val) end, + + ServerSeq = + [ + %% *** Wait for start order part *** + #{desc => "await start", + cmd => fun(State) -> + {Tester, MSA} = ?SEV_AWAIT_START(), + {ok, State#{tester => Tester, msa => MSA}} + end}, + #{desc => "monitor tester", + cmd => fun(#{tester := Tester} = _State) -> + _MRef = erlang:monitor(process, Tester), + ok + end}, + + %% *** Init part *** + #{desc => "which local address", + cmd => fun(#{domain := Domain} = State) -> + LAddr = which_local_addr(Domain), + LSA = #{family => Domain, addr => LAddr}, + {ok, State#{local_sa => LSA}} + end}, + #{desc => "create socket", + cmd => fun(#{domain := Domain} = State) -> + case socket:open(Domain, dgram, udp) of + {ok, Sock} -> + {ok, State#{sock => Sock}}; + {error, _} = ERROR -> + ERROR + end + end}, + #{desc => "make recv socket reuse addr", + cmd => fun(#{sock := Sock} = _State) -> + case socket:setopt(Sock, socket, reuseaddr, true) of + ok -> + ok; + {error, Reason} = ERROR -> + ?SEV_EPRINT("Failed set reuseaddr: " + "~n ~p", [Reason]), + ERROR + end + end}, + #{desc => "bind recv socket to multicast address", + cmd => fun(#{sock := Sock, msa := MSA} = State) -> + case socket:bind(Sock, MSA) of + {ok, Port} -> + ?SEV_IPRINT("bound to:" + "~n ~p", [Port]), + {ok, State#{msa => MSA#{port => Port}}}; + {error, _} = ERROR -> + ERROR + end + end}, + #{desc => "announce ready (init)", + cmd => fun(#{tester := Tester}) -> + ?SEV_ANNOUNCE_READY(Tester, init), + ok + end}, + + %% The actual test + #{desc => "await continue (add_membership)", + cmd => fun(#{tester := Tester} = _State) -> + ?SEV_AWAIT_CONTINUE(Tester, tester, add_membership) + end}, + #{desc => "add membership", + cmd => fun(#{sock := Sock, + msa := #{addr := MAddr}, + local_sa := #{addr := Addr}} = State) -> + MReq = #{multiaddr => MAddr, + interface => Addr}, + ?SEV_IPRINT("try add membership to:" + "~n ~p", [MReq]), + case AddMembership(Sock, MReq) of + ok -> + ?SEV_IPRINT("membership added"), + {ok, State#{mreq => MReq}}; + {error, Reason} = ERROR -> + ?SEV_EPRINT("Failed adding membership to: " + "~n ~p" + "~n Reason: ~p", + [MReq, Reason]), + ERROR + end + end}, + #{desc => "announce ready (add-membership)", + cmd => fun(#{tester := Tester}) -> + ?SEV_ANNOUNCE_READY(Tester, add_membership), + ok + end}, + + #{desc => "await continue (drop_membership)", + cmd => fun(#{tester := Tester} = _State) -> + ?SEV_AWAIT_CONTINUE(Tester, tester, drop_membership) + end}, + #{desc => "drop membership", + cmd => fun(#{sock := Sock, + mreq := MReq} = State) -> + ?SEV_IPRINT("try drop membership from:" + "~n ~p", [MReq]), + case DropMembership(Sock, MReq) of + ok -> + ?SEV_IPRINT("membership dropped"), + {ok, maps:remove(mreq, State)}; + {error, Reason} = ERROR -> + ?SEV_EPRINT("Failed drop membership from: " + "~n ~p" + "~n Reason: ~p", + [MReq, Reason]), + ERROR + end + end}, + #{desc => "announce ready (drop-membership)", + cmd => fun(#{tester := Tester}) -> + ?SEV_ANNOUNCE_READY(Tester, drop_membership), + ok + end}, + + + %% Termination + #{desc => "await terminate (from tester)", + cmd => fun(#{tester := Tester} = State) -> + case ?SEV_AWAIT_TERMINATE(Tester, tester) of + ok -> + {ok, maps:remove(tester, State)}; + {error, _} = ERROR -> + ERROR + end + end}, + #{desc => "close socket", + cmd => fun(#{sock := Sock} = State) -> + socket:close(Sock), + {ok, maps:remove(sock, State)} + end}, + + %% *** We are done *** + ?SEV_FINISH_NORMAL + ], + + + TesterSeq = + [ + %% *** Init part *** + #{desc => "monitor server", + cmd => fun(#{server := Server} = _State) -> + _MRef = erlang:monitor(process, Server), + ok + end}, + + %% Start the server + #{desc => "order server start", + cmd => fun(#{server := Pid, msa := MSA} = _State) -> + ?SEV_ANNOUNCE_START(Pid, MSA), + ok + end}, + #{desc => "await server ready (init)", + cmd => fun(#{server := Pid} = _State) -> + case ?SEV_AWAIT_READY(Pid, server, init) of + ok -> + ok; + {error, Reason} = ERROR -> + ?SEV_EPRINT("Start of server failed: " + "~n ~p", [Reason]), + ERROR + end + end}, + + + %% *** The actual test *** + #{desc => "order server to continue (add-membership)", + cmd => fun(#{server := Server} = _State) -> + ?SEV_ANNOUNCE_CONTINUE(Server, add_membership), + ok + end}, + #{desc => "await server ready (add-membership)", + cmd => fun(#{server := Server} = _State) -> + ?SEV_AWAIT_READY(Server, server, add_membership) + end}, + + #{desc => "order server to continue (drop-membership)", + cmd => fun(#{server := Server} = _State) -> + ?SEV_ANNOUNCE_CONTINUE(Server, drop_membership), + ok + end}, + #{desc => "await server ready (drop-membership)", + cmd => fun(#{server := Server} = _State) -> + ?SEV_AWAIT_READY(Server, server, drop_membership) + end}, + + ?SEV_SLEEP(?SECS(1)), + + %% *** Termination *** + #{desc => "order server terminate", + cmd => fun(#{server := Server} = _State) -> + ?SEV_ANNOUNCE_TERMINATE(Server), + ok + end}, + #{desc => "await server termination", + cmd => fun(#{server := Server} = State) -> + ?SEV_AWAIT_TERMINATION(Server), + {ok, maps:remove(server, State)} + end}, + + %% *** We are done *** + ?SEV_FINISH_NORMAL + ], + + + i("get multicast address"), + Domain = inet, + MAddr = which_ip_multicast_address(), + MSA = #{family => Domain, addr => MAddr}, + + i("start server evaluator"), + ServerInitState = #{domain => Domain}, + Server = ?SEV_START("server", ServerSeq, ServerInitState), + + i("start tester evaluator"), + TesterInitState = #{domain => Domain, + msa => MSA, + server => Server#ev.pid}, + Tester = ?SEV_START("tester", TesterSeq, TesterInitState), + + i("await evaluator(s)"), + ok = ?SEV_AWAIT_FINISH([Tester, Server]). + + + +which_ip_multicast_address() -> + which_multicast_address(inet). + +which_multicast_address(Domain) -> + case os:type() of + {unix, linux} -> + WhichMAddr = fun([_, _, MAddr]) -> MAddr end, + which_multicast_address2(Domain, WhichMAddr); + + {unix, sunos} -> + WhichMAddr = fun([_, MAddr, _]) -> MAddr end, + which_multicast_address2(Domain, WhichMAddr); + + Type -> + not_supported({multicast, Type}) + end. + +%% Note that the 'netstat -g' table looks different on linux and SunOS +%% Linux: IfName - RefCnt - Group +%% SunOS: IfName - Group - RefCnt + +which_multicast_address2(Domain, WhichMAddr) -> + IfName = which_local_host_ifname(Domain), + NetstatGroupsStr = os:cmd("netstat -g | grep " ++ IfName), + NetstatGroups0 = string:tokens(NetstatGroupsStr, [$\n]), + NetstatGroups = [string:tokens(G, [$ ]) || G <- NetstatGroups0], + MAddrs = [WhichMAddr(NetstatGroup) || NetstatGroup <- + NetstatGroups], + which_multicast_address3(Domain, MAddrs). + +which_multicast_address3(_Domain, []) -> + not_supported({multicast, no_valid_addrs}); +which_multicast_address3(Domain, [MAddrStr|MAddrs]) -> + %% Even on linux some of these are not actually addresses, but + %% "host names", such as all-systems.mcast.net. But both + %% address strings, such as "224.0.0.251" and host name strings + %% gets translated into an address by the inet:inet:getaddr/2. + case inet:getaddr(MAddrStr, Domain) of + {ok, MAddr} -> + MAddr; + {error, _} -> + which_multicast_address3(Domain, MAddrs) + end. + +which_local_host_ifname(Domain) -> + case which_local_host_info(Domain) of + {ok, {Name, _Addr, _Flags}} -> + Name; + {error, Reason} -> + not_supported({multicast, Reason}) + end. + + + %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% %% @@ -11304,7 +11633,7 @@ traffic_ping_pong_send_and_receive_udp2(InitState) -> LSA = #{family => Domain, addr => LAddr}, {ok, State#{local_sa => LSA}} end}, - #{desc => "create listen socket", + #{desc => "create socket", cmd => fun(#{domain := Domain} = State) -> case socket:open(Domain, dgram, udp) of {ok, Sock} -> @@ -17899,47 +18228,146 @@ local_host() -> end. + + %% This gets the local address (not 127.0...) %% We should really implement this using the (new) net module, %% but until that gets the necessary functionality... which_local_addr(Domain) -> - case inet:getifaddrs() of - {ok, IFL} -> - which_addr(Domain, IFL); + case which_local_host_info(Domain) of + {ok, {_Name, _Flags, Addr}} -> + Addr; {error, Reason} -> ?FAIL({inet, getifaddrs, Reason}) end. -which_addr(_Domain, []) -> +%% which_addr(_Domain, []) -> +%% ?FAIL(no_address); +%% which_addr(Domain, [{"lo" ++ _, _}|IFL]) -> +%% which_addr(Domain, IFL); +%% which_addr(Domain, [{"docker" ++ _, _}|IFL]) -> +%% which_addr(Domain, IFL); +%% which_addr(Domain, [{"br-" ++ _, _}|IFL]) -> +%% which_addr(Domain, IFL); +%% which_addr(Domain, [{_Name, IFO}|IFL]) -> +%% case which_addr2(Domain, IFO) of +%% {ok, Addr} -> +%% Addr; +%% {error, no_address} -> +%% which_addr(Domain, IFL) +%% end; +%% which_addr(Domain, [_|IFL]) -> +%% which_addr(Domain, IFL). + +%% which_addr2(_Domain, []) -> +%% {error, no_address}; +%% which_addr2(inet = _Domain, [{addr, Addr}|_IFO]) when (size(Addr) =:= 4) -> +%% {ok, Addr}; +%% which_addr2(inet6 = _Domain, [{addr, Addr}|_IFO]) when (size(Addr) =:= 8) -> +%% {ok, Addr}; +%% which_addr2(Domain, [_|IFO]) -> +%% which_addr2(Domain, IFO). + + +%% Returns the interface (name), flags and address (not 127...) +%% of the local host. +which_local_host_info(Domain) -> + case inet:getifaddrs() of + {ok, IFL} -> + which_local_host_info(Domain, IFL); + {error, _} = ERROR -> + ERROR + end. + +which_local_host_info(_Domain, []) -> ?FAIL(no_address); -which_addr(Domain, [{"lo" ++ _, _}|IFL]) -> - which_addr(Domain, IFL); -which_addr(Domain, [{_Name, IFO}|IFL]) -> - case which_addr2(Domain, IFO) of - {ok, Addr} -> - Addr; - {error, no_address} -> - which_addr(Domain, IFL) +which_local_host_info(Domain, [{"lo" ++ _, _}|IFL]) -> + which_local_host_info(Domain, IFL); +which_local_host_info(Domain, [{"docker" ++ _, _}|IFL]) -> + which_local_host_info(Domain, IFL); +which_local_host_info(Domain, [{"br-" ++ _, _}|IFL]) -> + which_local_host_info(Domain, IFL); +which_local_host_info(Domain, [{Name, IFO}|IFL]) -> + case which_local_host_info2(Domain, IFO) of + {ok, {Flags, Addr}} -> + {ok, {Name, Flags, Addr}}; + {error, _} -> + which_local_host_info(Domain, IFL) end; -which_addr(Domain, [_|IFL]) -> - which_addr(Domain, IFL). +which_local_host_info(Domain, [_|IFL]) -> + which_local_host_info(Domain, IFL). + +which_local_host_info2(Domain, IFO) -> + case lists:keysearch(flags, 1, IFO) of + {value, {flags, Flags}} -> + which_local_host_info2(Domain, IFO, Flags); + false -> + {error, no_flags} + end. -which_addr2(_Domain, []) -> +which_local_host_info2(_Domain, [], _Flags) -> {error, no_address}; -which_addr2(inet = _Domain, [{addr, Addr}|_IFO]) when (size(Addr) =:= 4) -> - {ok, Addr}; -which_addr2(inet6 = _Domain, [{addr, Addr}|_IFO]) when (size(Addr) =:= 8) -> - {ok, Addr}; -which_addr2(Domain, [_|IFO]) -> - which_addr2(Domain, IFO). +which_local_host_info2(inet = _Domain, [{addr, Addr}|_IFO], Flags) + when (size(Addr) =:= 4) andalso (element(1, Addr) =/= 127) -> + {ok, {Flags, Addr}}; +which_local_host_info2(inet6 = _Domain, [{addr, Addr}|_IFO], Flags) + when (size(Addr) =:= 8) andalso + (element(1, Addr) =/= 0) andalso + (element(1, Addr) =/= 16#fe80) -> + {ok, {Flags, Addr}}; +which_local_host_info2(Domain, [_|IFO], Flags) -> + which_local_host_info2(Domain, IFO, Flags). + + + + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +%% Here are all the *general* test case condition functions. + +%% We also need (be able) to figure out the the multicast address, +%% which we only support for some platforms (linux and sunos). +%% We don't do that here, but since we can only do that (find a +%% multicast address) for specific platforms, we check that we are +%% on of those platforms here. +has_ip_multicast_support() -> + case os:type() of + {unix, OsName} when (OsName =:= linux) orelse + (OsName =:= sunos) -> + case which_local_host_info(inet) of + {ok, {_Name, Flags, _Addr}} -> + case lists:member(multicast, Flags) of + true -> + ok; + false -> + not_supported(multicast) + end; + {error, Reason} -> + not_supported({multicast, Reason}) + end; + Type -> + not_supported({multicast, Type}) + end. +has_ip_add_membership_support() -> + has_socket_option_ip_support(add_membership). +has_ip_drop_membership_support() -> + has_socket_option_ip_support(drop_membership). +has_socket_option_ip_support(Opt) -> + has_socket_option_support(ip, Opt). + +has_socket_option_support(Level, Option) -> + case socket:supports(options, Level, Option) of + true -> + ok; + false -> + not_supported({options, Level, Option}) + end. -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% Here are all the *general* test vase condition functions. %% The idea is that this function shall test if the test host has %% support for IPv6. If not, there is no point in running IPv6 tests. @@ -17957,6 +18385,9 @@ has_support_ipv6() -> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +not_supported(What) -> + skip({not_supported, What}). + not_yet_implemented() -> skip("not yet implemented"). -- cgit v1.2.3