diff options
Diffstat (limited to 'erts/preloaded/src/socket.erl')
| -rw-r--r-- | erts/preloaded/src/socket.erl | 106 |
1 files changed, 104 insertions, 2 deletions
diff --git a/erts/preloaded/src/socket.erl b/erts/preloaded/src/socket.erl index c388fc2849..acf5e18cec 100644 --- a/erts/preloaded/src/socket.erl +++ b/erts/preloaded/src/socket.erl @@ -27,6 +27,7 @@ -export([ on_load/0, on_load/1, info/0, + supports/0, supports/1, supports/2, supports/3, ensure_sockaddr/1 ]). @@ -733,8 +734,8 @@ %% -define(SOCKET_OPT_IPV6_CHECKSUM, 5). % FreeBSD -define(SOCKET_OPT_IPV6_DROP_MEMBERSHIP, 6). -define(SOCKET_OPT_IPV6_DSTOPTS, 7). -%% -define(SOCKET_OPT_IPV6_ESP_TRANS_LEVEL, 8). % FreeBSD -%% -define(SOCKET_OPT_IPV6_ESP_NETWORK_LEVEL, 9). % FreeBSD +%% -define(SOCKET_OPT_IPV6_ESP_NETWORK_LEVEL, 8). % FreeBSD +%% -define(SOCKET_OPT_IPV6_ESP_TRANS_LEVEL, 9). % FreeBSD %% -define(SOCKET_OPT_IPV6_FAITH, 10). % FreeBSD -define(SOCKET_OPT_IPV6_FLOWINFO, 11). -define(SOCKET_OPT_IPV6_HOPLIMIT, 12). @@ -816,6 +817,10 @@ -define(SOCKET_SHUTDOWN_HOW_READ_WRITE, 2). +-define(SOCKET_SUPPORTS_OPTIONS, 16#0001). +-define(SOCKET_SUPPORTS_SCTP, 16#0002). +-define(SOCKET_SUPPORTS_IPV6, 16#0003). + %% =========================================================================== %% @@ -846,6 +851,100 @@ info() -> %% =========================================================================== %% +%% supports - get information about what the platform "supports". +%% +%% Generates a list of various info about what the plaform can support. +%% The most obvious case is 'options'. +%% +%% Each item in a 'supports'-list will appear only *one* time. +%% +%% =========================================================================== + +-type supports_options_socket() :: [{socket_option(), boolean()}]. +-type supports_options_ip() :: [{ip_socket_option(), boolean()}]. +-type supports_options_ipv6() :: [{ipv6_socket_option(), boolean()}]. +-type supports_options_tcp() :: [{tcp_socket_option(), boolean()}]. +-type supports_options_udp() :: [{udp_socket_option(), boolean()}]. +-type supports_options_sctp() :: [{sctp_socket_option(), boolean()}]. +-type supports_options() :: [{socket, supports_options_socket()} | + {ip, supports_options_ip()} | + {ipv6, supports_options_ipv6()} | + {tcp, supports_options_tcp()} | + {udp, supports_options_udp()} | + {sctp, supports_options_sctp()}]. + +-spec supports() -> [{options, supports_options()} | + {sctp, boolean()} | + {ipv6, boolean()}]. + +supports() -> + [{options, supports(options)}, + {sctp, supports(sctp)}, + {ipv6, supports(ipv6)}]. + + +-spec supports(options) -> supports_options(); + (sctp) -> boolean(); + (ipv6) -> boolean(); + (Key1) -> false when + Key1 :: term(). + +supports(options) -> + nif_supports(?SOCKET_SUPPORTS_OPTIONS); +supports(sctp) -> + nif_supports(?SOCKET_SUPPORTS_SCTP); +supports(ipv6) -> + nif_supports(?SOCKET_SUPPORTS_IPV6); +supports(_Key1) -> + false. + +-spec supports(options, socket) -> supports_options_socket(); + (options, ip) -> supports_options_ip(); + (options, ipv6) -> supports_options_ipv6(); + (options, tcp) -> supports_options_tcp(); + (options, udp) -> supports_options_udp(); + (options, sctp) -> supports_options_sctp(); + (Key1, Key2) -> false when + Key1 :: term(), + Key2 :: term(). + +supports(options, Level) -> + proplists:get_value(Level, supports(options), false); +supports(_Key1, _Level) -> + false. + + +-spec supports(options, socket, Opt) -> boolean() when + Opt :: socket_option(); + (options, ip, Opt) -> boolean() when + Opt :: ip_socket_option(); + (options, ipv6, Opt) -> boolean() when + Opt :: ipv6_socket_option(); + (options, tcp, Opt) -> boolean() when + Opt :: tcp_socket_option(); + (options, udp, Opt) -> boolean() when + Opt :: udp_socket_option(); + (options, sctp, Opt) -> boolean() when + Opt :: sctp_socket_option(); + (Key1, Key2, Key3) -> false when + Key1 :: term(), + Key2 :: term(), + Key3 :: term(). + +supports(options, Level, Opt) -> + case supports(options, Level) of + S when is_list(S) -> + proplists:get_value(Opt, S, false); + _ -> + false + end; +supports(_Key1, _Key2, _Key3) -> + false. + + + +%% =========================================================================== +%% %% The proper socket API %% %% =========================================================================== @@ -3417,6 +3516,9 @@ error(Reason) -> nif_info() -> erlang:nif_error(undef). +nif_supports(_Key) -> + erlang:nif_error(undef). + nif_open(_Domain, _Type, _Protocol, _Extra) -> erlang:nif_error(undef). |